USRE35916E - Cellular telephone system that uses position of a mobile unit to make call management decisions - Google Patents
Cellular telephone system that uses position of a mobile unit to make call management decisionsDownload PDFInfo
- Publication number
- USRE35916E USRE35916EUS08/552,486US55248695AUSRE35916EUS RE35916 EUSRE35916 EUS RE35916EUS 55248695 AUS55248695 AUS 55248695AUS RE35916 EUSRE35916 EUS RE35916E
- Authority
- US
- United States
- Prior art keywords
- mobile unit
- cell site
- geographic location
- mtso
- call
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001413cellular effectEffects0.000titleclaimsabstractdescription41
- 238000007726management methodMethods0.000claimsdescription17
- 238000000034methodMethods0.000claimsdescription11
- 238000004891communicationMethods0.000claimsdescription9
- 238000013500data storageMethods0.000claimsdescription2
- 238000004519manufacturing processMethods0.000claimsdescription2
- 238000012544monitoring processMethods0.000claimsdescription2
- 230000010267cellular communicationEffects0.000claims15
- 238000010586diagramMethods0.000description6
- 230000005540biological transmissionEffects0.000description5
- 230000008569processEffects0.000description5
- 230000008859changeEffects0.000description2
- 230000007613environmental effectEffects0.000description2
- 230000009467reductionEffects0.000description2
- 239000000969carrierSubstances0.000description1
- 238000010276constructionMethods0.000description1
- 230000007123defenseEffects0.000description1
- 230000000694effectsEffects0.000description1
- 238000004870electrical engineeringMethods0.000description1
- 238000005516engineering processMethods0.000description1
- 230000006870functionEffects0.000description1
- 239000003550markerSubstances0.000description1
- 238000012545processingMethods0.000description1
- 230000004044responseEffects0.000description1
- 230000029305taxisEffects0.000description1
- 238000012360testing methodMethods0.000description1
- 238000012546transferMethods0.000description1
Images
Classifications
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
- H04B7/18541—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection for handover of resources
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
- H04B7/18547—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station
- H04B7/1855—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification
- H04B7/18552—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification using a telephonic control signal and a second ranging satellite
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
Definitions
- the present inventionrelates to the general art of cellular mobile radiotelephone (CMR) technology, and to the particular field of managing the calls in a cellular system.
- CMRcellular mobile radiotelephone
- the typical CMR systemincludes a multiplicity of cells, such as indicated in FIG. 1.
- a particular geographic areais subdivided into a multiplicity of subareas, with each of the subareas being serviced by a stationary transmitter/receiver setup.
- the cellsare set up to carry signals to and from mobile units M in the range of the cell. If one cell becomes too crowded, it can be divided into smaller cells, by a process known as cell splitting.
- any particular geographic areacan become quite complicated with cells overlapping each other, and overlapping cells of other neighboring cellular systems.
- cellularis intended to be a term of convenience, and is not intended to be limiting.
- the present disclosureis intended to encompass any communication system in which an overall area can be divided into one or more subareas such as shown in FIG. 1.
- FIGS. 2 through 7A typical CMR set up is indicated in FIGS. 2 through 7, and will be described so an understanding of the problem to which this invention is directed can be obtained.
- FIGS. 2, 3 and 4show a typical cellular telephone unit 2 having a unique mobile identification number stored in a suitable location such as an electrically erasable programmable read-only memory (not shown). Telephone units of this kind are known to those skilled in this art, and thus will not be described in detail.
- the telephone unit 2includes a handset 4 having a keypad 5 as well as a speaker 6 and a microphone 7.
- a transceiver 8ordinarily built into the telephone unit 2, exchanges signals via an antenna 10 with a mobile telecommunications switching office or MTSO 12 via a cell site 14.
- a duplexer 15connects the antenna to the transceiver.
- the cell site 14includes an antenna 16 connected to a control terminal 17 via a transceiver 18.
- the cell 14is connected to the MTSO via a transmission link 20.
- the mobile unit Mmoves about the geographic areas covered by the various cells as indicated in FIG. 1. As that mobile unit moves about, it decodes the overhead message control signals generated by various cell site control channels. The mobile unit locks onto the cell site that is emitting the strongest signal. The mobile unit rescans channels periodically to update its status. If, for example, a fixed-position land-based telephone T is used to call the mobile unit, a signal is sent via landlines L, to the central office CO of a public/switched telephone system (PTSN) 12A. This system then utilizes the switching network SN associated therewith to call the MTSO 12 via a transmission link L1.
- PTSNpublic/switched telephone system
- the MTSOthen utilizes its own switching network and generates a page request signal to all cell sites via transmission links, such as the transmission link 20.
- the cell site which has been notified of the presence of the mobile unit Msends a signal back to the MTSO via the landlines alerting the MTSO of the presence of the mobile unit.
- the MTSOthen orders the mobile unit, via the notifying cell site, to tune to an assigned channel and receive the call. Billing and other business information are recorded in the MTSO at this time.
- the mobile unitrescans the control channels to determine which is the best server based on signal strength. Upon selecting the best server, the mobile unit transmits call site information on the control channel receive frequency and then receives a voice channel to tune to if the mobile unit is authorized to place a call.
- the MTSOhas a signal strength table ST, and signal strength from the mobile unit is constantly compared to acceptable signal strength levels in the table. Such a table can be located in each cell site if desired.
- the MTSOShould signal strength diminish below a preset range, the MTSO generates a "locate request" signal to all cell sites that neighbor the original cell site. Each of such neighboring cell sites receiving a signal from the mobile unit signals the MTSO, and the signal strength from such neighboring cell sites are checked against the signal strength table. The MTSO makes a decision as to which cell site should control the call, and notifies the original cell site to order the mobile unit to retune to a voice channel of the new cell site.
- the mobile unitcompletes the call via the new cell site channel. This transfer of control is known as a handoff.
- a mobile unitmay use a cell that is located far from the mobile unit rather than a cell located immediately adjacent to that mobile unit.
- Hilly terrainis a common example of this problem. While this may not be a technical problem, it is important because a cellular company cannot assess long distance charges and/or message units to the calls. This deprives the cellular company of income that it could otherwise receive and customers of optimum service. Communities are also deprived of tax income that might be assessed against such calls as well.
- a cellular systemthat can provide consistently high quality service, yet can do so with a minimum number of cell sites in a particular geographic area. Still further, there is a need for a cellular system that can accurately assess charges for all CMR services including message units for calls covering a certain distance within the geographic area.
- GPSGlobal Positioning System
- LORANLO Radio Access
- the NAVSTAR global positioning system, or GPSis a system employing ultimately eighteen satellites in twelve hour orbits of 55° inclination. The system is being implemented by the Department of Defense for military use. However, it has a "clear access" (C/A) channel that is available for general civil use.
- the GPSis a passive navigation system on the part of the user, in that only reception of satellite-transmitted signals is required by the user to compute position.
- the GPSprovides a capability for continuous position determination, and a position can be computed on the order of every second of time, and thus provides a capability of determining the position of a highly mobile vehicle.
- a full discussion of the GPSis presented in textbooks, such as "Handbook of Modern Electronics and Electrical Engineering,” edited by Charles Belove and published in 1986 by Wiley-Interscience (see chapter 54 thereof, the disclosure of which is incorporated herein by reference), and includes a satellite positioned in a geostationary orbit and communicating with ground-based receivers. Based on the signals received from the satellite, the exact position in longitude and latitude, of the ground-based receiver can be determined with an extremely high degree of accuracy and precision.
- the exact longitude and latitude of the mobile unitis then communicated to the MTSO, and the cell site that services that particular position is signalled by the MTSO to carry the call associated with the mobile unit.
- the position of the mobile unitis constantly updated, and call management decisions, such as handoffs, can be made based on the location of the mobile unit rather than the strength of the signal associated with that unit.
- the MTSOhas a look-up table in its data storage facilities that compares positional data from the mobile units to data associated with cell site coverage areas. Based on a look up in this table, the MTSO can select the cell site most appropriate to a call.
- call management decisionsare made based on position of the mobile unit, the number of cell sites can be reduced as communication is not subject to vagaries of weather or the like to the degree that call management decisions based on signal strength are. Even with the reduced number of cell sites, the quality of calls using such a system is improved due to proper handoff.
- the systemis quite flexible, and cell site placement and frequency reuse are extremely efficient since call management is much more precise than in systems that use signal strength to make call management decisions.
- the cellular system of the present inventionin which call management decisions are made based on position of the mobile unit can reduce or eliminate the provision of cellular service beyond the authorized area, in effect reducing the interference to and from neighboring cellular carriers (reduction of inter-system interference) and more precisely define the inter-system service boundaries and handoff parameters.
- This systemalso permits precise definition of service boundaries for individual cell sites thereby allowing for greater system control and the reduction of intra-system interference.
- accurate and detailed cell site usage and traffic pattern datacan be developed in the present system, thereby enabling accurate and precise control of system growth.
- the present cellular systemcan also be real-time tailored based on current cellular use.
- FIG. 1illustrates a geographic area divided into a multiplicity of cells.
- FIG. 2illustrates a typical prior art mobile cellular telephone and its link with a fixed cell site and an MTSO.
- FIG. 3illustrates the mobile unit of the cellular telephone system shown in FIG. 2.
- FIG. 4illustrates a typical prior art cellular system in which a mobile unit can be connected with a fixed-position unit.
- FIG. 4Ais a block diagram showing systems included in the MTSO shown in FIG. 4.
- FIG. 5is a flow diagram of a call originated by the PTSN (public service telephone network) and a mobile unit using a prior art cellular system.
- PTSNpublic service telephone network
- FIG. 6is a block diagram of a mobile unit of a cellular telephone system which incorporates a GPS location determining system embodying the present invention.
- FIG. 7illustrates a cellular system incorporating a GPS position locating system for a mobile unit communicating with other units, such as the fixed-position unit shown.
- FIG. 7Ais a block diagram showing systems included in the MTSO shown in FIG. 7.
- FIG. 8is a block diagram illustrating the cellular system embodying the present invention.
- FIG. 9illustrates a look-up table that is incorporated into the MTSO of the present invention to make call management decisions based on the location of a mobile unit.
- FIG. 10is a block diagram illustrating a landline-to-mobile unit call in which position data are exchanged between the mobile unit and the MTSO.
- FIG. 11A and 11Bcomprise a flow chart illustrating a call sequence between a mobile unit and another unit in which switching decisions are made based on the position of the mobile unit rather than the strength of the signal associated with the mobile unit.
- FIGS. 6, 7 and 7AShown in FIGS. 6, 7 and 7A is a cellular system 20 embodying the present invention.
- the cellular system 20uses positional data associated with the mobile unit M' to make call management decisions.
- the cellular system 20while similar in all other respects to the cellular system illustrated in FIGS. 2 and 3, includes means for accurately and precisely determining the exact position of the mobile unit M', and then further includes means for using this positional information to determine which cell site is best suited to handle a call associated with that mobile unit M'.
- the means for accurately determining the precise position of the mobile unitincludes a Global Positioning System.
- the GPSincludes satellites, such as satellite 22 in geostationary orbit about the earth.
- Each mobile unitfurther includes a GPS receiver 24 located between the duplexer and the logic circuitry 25 of the mobile unit.
- the GPS receivercommunicates with the satellite 22 and the exact longitude and latitude of the mobile unit are determined. This information is sent to the MTSO via a cell site, and the MTSO uses a look-up table such as disclosed in FIG. 9, containing the geographic location of each cell site in the cellular system, to determine which cell site is most appropriate for use by the mobile unit.
- the mobile unitcommunicates with cell sites using unused bits of the aforediscussed overhead messages to send its positional information to the MTSO when the mobile unit is first activated. This positional information is relayed to the MTSO by the first cell site to communicate with the mobile unit. The MTSO then selects the cell site most appropriate for the mobile unit and hands that mobile unit off to that cell site.
- the cell sitestransmit system service boundaries in their overhead messages that are interpreted by mobile units.
- the mobile unitsuse the location information supplied by the GPS receiver as opposed to signal strength to determine which system to originate on. Call termination can utilize the paging process as is currently utilized.
- a response from a mobile unitincludes the location information, and the designated control channel instructs the mobile unit to tune to one of its channels.
- a call in progressutilizes the overhead message of the voice channel to communicate location information. Once a mobile unit that is call processing on a particular site crosses a cell boundary, it is instructed to perform a handoff to the cell that is to service the new location.
- the GPSis used as an example of the preferred source of positional data; however, other sources similar to the GPS can be used without departing from the scope of the present invention. All that is required is that the source of positional data be able to generate precise and accurate locational data on a fixed or a rapidly moving object. It is also helpful, but not absolutely required, that the CMR be only passively involved in the determination of the positional data.
- the handoff processis similar to the present handoff processes, except it will be controlled according to position of the mobile unit instead of signal strength. This position information is used to determine call rating and taxing for billing purposes and call routing to make sure that the proper services for that location are provided.
- a "locate request" signalis not used, since the exact location of the mobile unit is known to the MTSO. However, as indicated in FIG. 8, a signal strength method can also be used in making call management decisions if suitable. Such a process would be used if the mobile unit moves into a prior art cellular system.
- FIG. 11A call using the cellular system of the present invention is illustrated in FIG. 11.
- Initial communication between a mobile unit and the MTSOis established using the overhead communication network described above.
- the mobile unitscans marker channels and initially locks onto the cell site that has the strongest signal. This cell site may not be the most appropriate cell site for use by that mobile unit, but it serves as an entrey into the system.
- the mobile unituses the GPS receiver 24 and GPS satellite 22 and to determine its exact longitude and latitude. This information is then relayed to the MTSO using the originating cell site.
- the MTSOuses this information in conjunction with a look-up table such as shown in FIG. 9 to establish communication between the mobile unit and the cell site most appropriate to that mobile unit.
- the mobile unitis then handed off to that cell site.
- a call initiated by that mobile unitis routed through the appropriate cell site.
- the MTSOcan include a software system in the memory 30 shown in FIG. 8 to use the position controlled system, but to also test signal strength, and to use a signal strength controlled system if a signal still falls below a predetermined value when making call management decisions based on the position of the mobile unit. In this manner, the best of both systems can be obtained.
- the system of the present inventioncan also be used to allow a mobile to place calls only on its home system at the decision of the mobile.
- the mobile locating features of the systemcould also be important in other contexts, such as emergencies or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
The present invention relates to the general art of cellular mobile radiotelephone (CMR) technology, and to the particular field of managing the calls in a cellular system.
CMR is a rapidly growing telecommunications system. The typical CMR system includes a multiplicity of cells, such as indicated in FIG. 1. A particular geographic area is subdivided into a multiplicity of subareas, with each of the subareas being serviced by a stationary transmitter/receiver setup. The cells are set up to carry signals to and from mobile units M in the range of the cell. If one cell becomes too crowded, it can be divided into smaller cells, by a process known as cell splitting. As can be seen from FIG. 1, any particular geographic area can become quite complicated with cells overlapping each other, and overlapping cells of other neighboring cellular systems. It is noted that the term "cellular" is intended to be a term of convenience, and is not intended to be limiting. The present disclosure is intended to encompass any communication system in which an overall area can be divided into one or more subareas such as shown in FIG. 1.
A typical CMR set up is indicated in FIGS. 2 through 7, and will be described so an understanding of the problem to which this invention is directed can be obtained.
FIGS. 2, 3 and 4 show a typicalcellular telephone unit 2 having a unique mobile identification number stored in a suitable location such as an electrically erasable programmable read-only memory (not shown). Telephone units of this kind are known to those skilled in this art, and thus will not be described in detail.
Thetelephone unit 2 includes ahandset 4 having akeypad 5 as well as aspeaker 6 and amicrophone 7. Atransceiver 8, ordinarily built into thetelephone unit 2, exchanges signals via anantenna 10 with a mobile telecommunications switching office or MTSO 12 via acell site 14. Aduplexer 15 connects the antenna to the transceiver. Thecell site 14 includes anantenna 16 connected to acontrol terminal 17 via atransceiver 18. Thecell 14 is connected to the MTSO via atransmission link 20.
Referring to FIGS. 4, 4A and 5, the operation of the CMR can be understood. The mobile unit M moves about the geographic areas covered by the various cells as indicated in FIG. 1. As that mobile unit moves about, it decodes the overhead message control signals generated by various cell site control channels. The mobile unit locks onto the cell site that is emitting the strongest signal. The mobile unit rescans channels periodically to update its status. If, for example, a fixed-position land-based telephone T is used to call the mobile unit, a signal is sent via landlines L, to the central office CO of a public/switched telephone system (PTSN) 12A. This system then utilizes the switching network SN associated therewith to call the MTSO 12 via a transmission link L1. The MTSO then utilizes its own switching network and generates a page request signal to all cell sites via transmission links, such as thetransmission link 20. The cell site which has been notified of the presence of the mobile unit M sends a signal back to the MTSO via the landlines alerting the MTSO of the presence of the mobile unit. The MTSO then orders the mobile unit, via the notifying cell site, to tune to an assigned channel and receive the call. Billing and other business information are recorded in the MTSO at this time.
On the other hand, during call origination, the mobile unit rescans the control channels to determine which is the best server based on signal strength. Upon selecting the best server, the mobile unit transmits call site information on the control channel receive frequency and then receives a voice channel to tune to if the mobile unit is authorized to place a call.
As the mobile unit moves, the signal strength between that mobile unit and the originating cell site changes, and perhaps diminishes. Since signal strength is an inverse function of the square of the distance between the mobile unit and the cell site, signal strength can change rapidly and drastically as the mobile unit moves with respect to the cell site and therefore must be monitored closely. Moreover, signal strength can be strongly affected by terrain, environmental conditions as well as interference from other sources. The MTSO has a signal strength table ST, and signal strength from the mobile unit is constantly compared to acceptable signal strength levels in the table. Such a table can be located in each cell site if desired.
Should signal strength diminish below a preset range, the MTSO generates a "locate request" signal to all cell sites that neighbor the original cell site. Each of such neighboring cell sites receiving a signal from the mobile unit signals the MTSO, and the signal strength from such neighboring cell sites are checked against the signal strength table. The MTSO makes a decision as to which cell site should control the call, and notifies the original cell site to order the mobile unit to retune to a voice channel of the new cell site.
As soon as the mobile unit retunes, the mobile unit completes the call via the new cell site channel. This transfer of control is known as a handoff.
While this method of making switching decisions has worked well in the past, the growth and sophistication of the cellular industry has resulted in severe drawbacks to this method. First, due to uneven terrain, unpredictable environmental conditions, interference and the like, many cellular companies have been required to construct numerous cell sites. These cells often overlap neighboring cell sites and provide redundant coverage. This is extremely expensive, not only from the standpoint of construction costs, but due to monitoring and staffing costs as well. Even at this, conditions can change so rapidly that coverage may still be inconsistent.
Still further, due to idiosyncrasies in terrain and environment, a mobile unit may use a cell that is located far from the mobile unit rather than a cell located immediately adjacent to that mobile unit. Hilly terrain is a common example of this problem. While this may not be a technical problem, it is important because a cellular company cannot assess long distance charges and/or message units to the calls. This deprives the cellular company of income that it could otherwise receive and customers of optimum service. Communities are also deprived of tax income that might be assessed against such calls as well.
Still further, since only signal strength is used to make switching decisions, the location of a caller is not ascertainable. This could be important in keeping track of calls.
Other problems that have been experienced in such cellular systems include the inability to completely control the cell site transmit signal, crosstalk noise interference, dropped calls, overlap and an inability to adequately service areas with undulating terrain without infringing the borders of other cellular territories.
Therefore, there is a need for a cellular system that can provide consistently high quality service, yet can do so with a minimum number of cell sites in a particular geographic area. Still further, there is a need for a cellular system that can accurately assess charges for all CMR services including message units for calls covering a certain distance within the geographic area.
It is a main object of the present invention to provide a cellular system that can provide high quality service using only a minimum number of cell sites within a given geographic area.
It is another object of the present invention to provide a cellular system that can accurately track a mobile unit within the geographic area covered by the cellular system.
It is another object of the present invention to provide a cellular system that can assess charges for calls based on the geographic location of the call.
These, and other, objects are achieved by a cellular system that makes switching and call management decisions based on the location of a mobile unit rather than on the strength of the signal associated with that mobile unit. The exact location of each mobile unit is determined using a Global Positioning System (GPS), LORAN, or other position determining system. The NAVSTAR global positioning system, or GPS, is a system employing ultimately eighteen satellites in twelve hour orbits of 55° inclination. The system is being implemented by the Department of Defense for military use. However, it has a "clear access" (C/A) channel that is available for general civil use. The GPS is a passive navigation system on the part of the user, in that only reception of satellite-transmitted signals is required by the user to compute position. The GPS provides a capability for continuous position determination, and a position can be computed on the order of every second of time, and thus provides a capability of determining the position of a highly mobile vehicle. A full discussion of the GPS is presented in textbooks, such as "Handbook of Modern Electronics and Electrical Engineering," edited by Charles Belove and published in 1986 by Wiley-Interscience (see chapter 54 thereof, the disclosure of which is incorporated herein by reference), and includes a satellite positioned in a geostationary orbit and communicating with ground-based receivers. Based on the signals received from the satellite, the exact position in longitude and latitude, of the ground-based receiver can be determined with an extremely high degree of accuracy and precision.
The exact longitude and latitude of the mobile unit is then communicated to the MTSO, and the cell site that services that particular position is signalled by the MTSO to carry the call associated with the mobile unit. The position of the mobile unit is constantly updated, and call management decisions, such as handoffs, can be made based on the location of the mobile unit rather than the strength of the signal associated with that unit. The MTSO has a look-up table in its data storage facilities that compares positional data from the mobile units to data associated with cell site coverage areas. Based on a look up in this table, the MTSO can select the cell site most appropriate to a call.
Since the position of the mobile unit is known to the MTSO, the assessment of message units, taxes, and other charges can be made. The billing will be more consistent than is possible with present systems. Of course, call routing will be greatly improved in the system of the present invention as compared to prior systems.
Still further, since call management decisions are made based on position of the mobile unit, the number of cell sites can be reduced as communication is not subject to vagaries of weather or the like to the degree that call management decisions based on signal strength are. Even with the reduced number of cell sites, the quality of calls using such a system is improved due to proper handoff. The system is quite flexible, and cell site placement and frequency reuse are extremely efficient since call management is much more precise than in systems that use signal strength to make call management decisions.
The cellular system of the present invention in which call management decisions are made based on position of the mobile unit can reduce or eliminate the provision of cellular service beyond the authorized area, in effect reducing the interference to and from neighboring cellular carriers (reduction of inter-system interference) and more precisely define the inter-system service boundaries and handoff parameters. This system also permits precise definition of service boundaries for individual cell sites thereby allowing for greater system control and the reduction of intra-system interference. Still further, accurate and detailed cell site usage and traffic pattern data can be developed in the present system, thereby enabling accurate and precise control of system growth. The present cellular system can also be real-time tailored based on current cellular use.
FIG. 1 illustrates a geographic area divided into a multiplicity of cells.
FIG. 2 illustrates a typical prior art mobile cellular telephone and its link with a fixed cell site and an MTSO.
FIG. 3 illustrates the mobile unit of the cellular telephone system shown in FIG. 2.
FIG. 4 illustrates a typical prior art cellular system in which a mobile unit can be connected with a fixed-position unit.
FIG. 4A is a block diagram showing systems included in the MTSO shown in FIG. 4.
FIG. 5 is a flow diagram of a call originated by the PTSN (public service telephone network) and a mobile unit using a prior art cellular system.
FIG. 6 is a block diagram of a mobile unit of a cellular telephone system which incorporates a GPS location determining system embodying the present invention.
FIG. 7 illustrates a cellular system incorporating a GPS position locating system for a mobile unit communicating with other units, such as the fixed-position unit shown.
FIG. 7A is a block diagram showing systems included in the MTSO shown in FIG. 7.
FIG. 8 is a block diagram illustrating the cellular system embodying the present invention.
FIG. 9 illustrates a look-up table that is incorporated into the MTSO of the present invention to make call management decisions based on the location of a mobile unit.
FIG. 10 is a block diagram illustrating a landline-to-mobile unit call in which position data are exchanged between the mobile unit and the MTSO.
FIG. 11A and 11B comprise a flow chart illustrating a call sequence between a mobile unit and another unit in which switching decisions are made based on the position of the mobile unit rather than the strength of the signal associated with the mobile unit.
Shown in FIGS. 6, 7 and 7A is acellular system 20 embodying the present invention. Thecellular system 20 uses positional data associated with the mobile unit M' to make call management decisions. To this end, thecellular system 20, while similar in all other respects to the cellular system illustrated in FIGS. 2 and 3, includes means for accurately and precisely determining the exact position of the mobile unit M', and then further includes means for using this positional information to determine which cell site is best suited to handle a call associated with that mobile unit M'.
The means for accurately determining the precise position of the mobile unit includes a Global Positioning System. The GPS includes satellites, such assatellite 22 in geostationary orbit about the earth. Each mobile unit further includes aGPS receiver 24 located between the duplexer and thelogic circuitry 25 of the mobile unit. The GPS receiver communicates with thesatellite 22 and the exact longitude and latitude of the mobile unit are determined. This information is sent to the MTSO via a cell site, and the MTSO uses a look-up table such as disclosed in FIG. 9, containing the geographic location of each cell site in the cellular system, to determine which cell site is most appropriate for use by the mobile unit. The mobile unit communicates with cell sites using unused bits of the aforediscussed overhead messages to send its positional information to the MTSO when the mobile unit is first activated. This positional information is relayed to the MTSO by the first cell site to communicate with the mobile unit. The MTSO then selects the cell site most appropriate for the mobile unit and hands that mobile unit off to that cell site. The cell sites transmit system service boundaries in their overhead messages that are interpreted by mobile units. The mobile units use the location information supplied by the GPS receiver as opposed to signal strength to determine which system to originate on. Call termination can utilize the paging process as is currently utilized. A response from a mobile unit includes the location information, and the designated control channel instructs the mobile unit to tune to one of its channels. A call in progress utilizes the overhead message of the voice channel to communicate location information. Once a mobile unit that is call processing on a particular site crosses a cell boundary, it is instructed to perform a handoff to the cell that is to service the new location. It is understood that the GPS is used as an example of the preferred source of positional data; however, other sources similar to the GPS can be used without departing from the scope of the present invention. All that is required is that the source of positional data be able to generate precise and accurate locational data on a fixed or a rapidly moving object. It is also helpful, but not absolutely required, that the CMR be only passively involved in the determination of the positional data.
The handoff process is similar to the present handoff processes, except it will be controlled according to position of the mobile unit instead of signal strength. This position information is used to determine call rating and taxing for billing purposes and call routing to make sure that the proper services for that location are provided.
A "locate request" signal is not used, since the exact location of the mobile unit is known to the MTSO. However, as indicated in FIG. 8, a signal strength method can also be used in making call management decisions if suitable. Such a process would be used if the mobile unit moves into a prior art cellular system.
A call using the cellular system of the present invention is illustrated in FIG. 11. Initial communication between a mobile unit and the MTSO is established using the overhead communication network described above. The mobile unit scans marker channels and initially locks onto the cell site that has the strongest signal. This cell site may not be the most appropriate cell site for use by that mobile unit, but it serves as an entrey into the system. Once this initial communication is established, the mobile unit uses theGPS receiver 24 andGPS satellite 22 and to determine its exact longitude and latitude. This information is then relayed to the MTSO using the originating cell site. The MTSO uses this information in conjunction with a look-up table such as shown in FIG. 9 to establish communication between the mobile unit and the cell site most appropriate to that mobile unit. The mobile unit is then handed off to that cell site. A call initiated by that mobile unit is routed through the appropriate cell site.
As indicated in FIG. 11, business information associated with the call, can be recorded at the MTSO. As indicated in FIG. 10, the dotted lines represent data transmission that contains GPS information. It is also noted that since both a position controlled system and a signal strength system are included in the cellular system of the present invention, the MTSO can include a software system in thememory 30 shown in FIG. 8 to use the position controlled system, but to also test signal strength, and to use a signal strength controlled system if a signal still falls below a predetermined value when making call management decisions based on the position of the mobile unit. In this manner, the best of both systems can be obtained.
The system of the present invention can also be used to allow a mobile to place calls only on its home system at the decision of the mobile. The mobile locating features of the system could also be important in other contexts, such as emergencies or the like.
It is understood that while certain forms of the present invention have been illustrated and described herein, it is not to be limited to the specific forms or arrangements of parts described and shown.
Claims (15)
1. A cellular communications system that includes one or more cell sites and an MTSO, said system comprising:
A) locating means in a mobile unit of a cellular communications system for determining the exact geographic location of the mobile unit, said locating means including means using a satellite communication system for establishing an exact geographic location of said mobile unit and for emitting a position signal of said exact geographic location;
B) means in the MTSO for receiving the position signal transmitted by the mobile unit and using that position signal to establish the exact geographic location of the mobile unit vis . .e.!. .Iadd.a .Iaddend.vis cell sites in the cellular communications . .network.!. .Iadd.system.Iaddend.; and
C) data storage and comparison means in the MTSO storing cell site location data giving a geographic location for each of the cell sites in the cellular communications . .network.!. .Iadd.system .Iaddend.and effecting a comparison between said position signal and . .said.!. .Iadd.the .Iaddend.cell site location data and selecting a chosen cell site for use by said mobile unit based on said comparison and establishing communication between said mobile unit and said chosen cell site based on the exact geographic location of the mobile unit .Iadd.and using the geographic location of the mobile unit for taxing and billing wherein said taxing and billing is irrespective of cell site geographic location.Iaddend..
2. The cellular communication system defined in claim 1 wherein said locating means includes a means for communicating with a satellite.
3. The cellular communication system defined in claim 2 wherein said means in the MTSO for determining the geographic location of a cell site includes a look-up table.
4. The cellular communication system defined in claim 3 wherein said locating means includes a GPS.
5. The cellular communication system defined in claim 3 wherein said locating means includes a GPS receiver connected to logic circuitry in said mobile unit.
6. The cellular communications system defined in claim 5 wherein said mobile unit includes a duplexer.
7. The cellular communications system defined in claim 6 wherein said mobile unit includes a GPS receiver located between said duplexer and said logic circuitry.
8. The cellular communications system defined in claim 7 further including means for placing location data on voice and data communication signals.
9. The cellular communications system defined in claim 8 further including means for making call management decisions based on signal strength.
10. A cellular communications system that includes one or more cell sites and an MTSO, said system comprising:
A) locating means in a mobile unit in . .a.!. .Iadd.the .Iaddend.cellular communications system for determining the exact geographic location of the mobile unit; and
B) management means in the MTSO for making management decisions based on the geographic location of the mobile unit, said management means including means for storing the geographic location for each cell site in the cellular communications system and for comparing the exact geographic location of the mobile unit to the geographic location of each cell site and for selecting a .Iadd.chosen .Iaddend.cell site for use by the mobile unit based on such .Iadd.comparison and for call routing to provide proper services for the mobile unit.Iaddend..
11. A method of making call management decisions in a cellular telephone system having a plurality of cell sites and an MTSO comprising:
A) establishing a geographic location for a mobile unit;
B) matching the geographic location of the mobile unit to a cell site location; . .and.!.
C) using the cell site matched to the mobile unit to handle calls associated with the mobile unit. ...!. .Iadd.and
D) taxing and billing for the mobile unit irrespective of cell site geographic location..Iaddend.
12. The method defined in claim 11 further including a step of handing off the mobile unit to a second cell site based on the position of the mobile unit.
13. The method defined in claim 12 further including a step of continuously monitoring the position of the mobile unit as the mobile unit moves, and handing off the mobile unit to various cell sites based on the instantaneous location of the mobile unit.
14. The method defined in claim 13 further including assessing message unit charges to a call made from the mobile unit.
15. The method defined in claim 13 wherein said call management decisions include deciding which cell site will initially handle a call to or from a mobile unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/552,486USRE35916E (en) | 1991-12-26 | 1995-11-09 | Cellular telephone system that uses position of a mobile unit to make call management decisions |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/813,494US5235633A (en) | 1991-12-26 | 1991-12-26 | Cellular telephone system that uses position of a mobile unit to make call management decisions |
| US08/552,486USRE35916E (en) | 1991-12-26 | 1995-11-09 | Cellular telephone system that uses position of a mobile unit to make call management decisions |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/813,494ReissueUS5235633A (en) | 1991-12-26 | 1991-12-26 | Cellular telephone system that uses position of a mobile unit to make call management decisions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| USRE35916Etrue USRE35916E (en) | 1998-10-06 |
Family
ID=25212546
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/813,494CeasedUS5235633A (en) | 1991-12-26 | 1991-12-26 | Cellular telephone system that uses position of a mobile unit to make call management decisions |
| US08/552,486Expired - LifetimeUSRE35916E (en) | 1991-12-26 | 1995-11-09 | Cellular telephone system that uses position of a mobile unit to make call management decisions |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/813,494CeasedUS5235633A (en) | 1991-12-26 | 1991-12-26 | Cellular telephone system that uses position of a mobile unit to make call management decisions |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US5235633A (en) |
| AU (1) | AU3414193A (en) |
| WO (1) | WO1993013618A1 (en) |
Cited By (66)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999051038A3 (en)* | 1998-03-31 | 2000-08-31 | Greg A Piccionelli | Communication network based on geographic location |
| US6141548A (en) | 1998-02-02 | 2000-10-31 | Motorola, Inc. | Method and apparatus for location based intercept in a communications system |
| US6144336A (en) | 1997-05-19 | 2000-11-07 | Integrated Data Communications, Inc. | System and method to communicate time stamped, 3-axis geo-position data within telecommunication networks |
| US6289297B1 (en) | 1998-10-09 | 2001-09-11 | Microsoft Corporation | Method for reconstructing a video frame received from a video source over a communication channel |
| US6321092B1 (en) | 1998-11-03 | 2001-11-20 | Signal Soft Corporation | Multiple input data management for wireless location-based applications |
| US6385454B1 (en)* | 1998-10-09 | 2002-05-07 | Microsoft Corporation | Apparatus and method for management of resources in cellular networks |
| US6393293B1 (en)* | 2000-01-21 | 2002-05-21 | Motorola, Inc. | Method for rectangular parameterization of a geographic area using a geolocation algorithm |
| US6400943B1 (en) | 1997-02-03 | 2002-06-04 | Nortel Networks Limited | Method and apparatus for using advanced positioning systems in cellular communication networks |
| US20020093990A1 (en)* | 1997-05-19 | 2002-07-18 | Preston Dan A. | In-band signaling for data communications over digital wireless telecommunications networks |
| US6438136B1 (en) | 1998-10-09 | 2002-08-20 | Microsoft Corporation | Method for scheduling time slots in a communications network channel to support on-going video transmissions |
| US6445701B1 (en) | 1998-10-09 | 2002-09-03 | Microsoft Corporation | Channel access scheme for use in network communications |
| US20020128018A1 (en)* | 2001-03-09 | 2002-09-12 | Bybee Michael F. | Methodology for mobile user terminals in broadband systems |
| US20020172193A1 (en)* | 1997-05-19 | 2002-11-21 | Preston Dan A. | In-band signaling for data communications over digital wireless telecommunications networks |
| US6490455B1 (en) | 1998-10-20 | 2002-12-03 | Samsung Electronics, Co., Ltd. | Apparatus and method for detecting a mobile phone in idle state |
| US6507587B1 (en) | 1998-10-09 | 2003-01-14 | Microsoft Corporation | Method of specifying the amount of bandwidth to reserve for use in network communications |
| US20030013449A1 (en)* | 2001-07-11 | 2003-01-16 | Hose David A. | Monitoring boundary crossings in a wireless network |
| US6519004B1 (en) | 1998-10-09 | 2003-02-11 | Microsoft Corporation | Method for transmitting video information over a communication channel |
| US6529823B1 (en)* | 1999-01-28 | 2003-03-04 | International Business Machines Corporation | Maintaining desired distribution of machines using time multiplexed global positioning system |
| US20030083080A1 (en)* | 2001-11-01 | 2003-05-01 | Airbiquity Inc. | Facility and method for wireless transmission of data |
| US6591103B1 (en) | 1999-06-30 | 2003-07-08 | International Business Machine Corp. | Wireless telecommunications system and method of operation providing users′ carrier selection in overlapping hetergenous networks |
| US6618363B1 (en) | 1998-10-09 | 2003-09-09 | Microsoft Corporation | Method for adapting video packet generation and transmission rates to available resources in a communications network |
| USRE38267E1 (en)* | 1994-06-22 | 2003-10-07 | Verizon Laboratories, Inc. | Cellular network-based geographic coverage area reporting method and apparatus |
| US6681121B1 (en) | 2000-03-21 | 2004-01-20 | Airbiquity Inc. | Circuitry for activating a modem in a cellular telephone |
| US6714789B1 (en)* | 2000-09-18 | 2004-03-30 | Sprint Spectrum, L.P. | Method and system for inter-frequency handoff and capacity enhancement in a wireless telecommunications network |
| US6754266B2 (en) | 1998-10-09 | 2004-06-22 | Microsoft Corporation | Method and apparatus for use in transmitting video information over a communication network |
| US20040203854A1 (en)* | 2002-04-26 | 2004-10-14 | Nowak Steven P. | Formatting location information based on output device specifications |
| US20050020242A1 (en)* | 1999-07-29 | 2005-01-27 | Bryan Holland | Locator system |
| US20050144620A1 (en)* | 2003-12-25 | 2005-06-30 | Fanuc Ltd | Software download system for controller |
| US6952181B2 (en) | 1996-09-09 | 2005-10-04 | Tracbeam, Llc | Locating a mobile station using a plurality of wireless networks and applications therefor |
| US7092722B1 (en) | 2001-07-26 | 2006-08-15 | Sprint Spectrum L.P. | Method and system for establishing mobile station active set based on mobile station location |
| US7260399B1 (en) | 2004-08-30 | 2007-08-21 | Sprint Spectrum L.P. | Method and system for asymmetric handoff of wireless communication sessions |
| US7274332B1 (en) | 1996-09-09 | 2007-09-25 | Tracbeam Llc | Multiple evaluators for evaluation of a purality of conditions |
| US7298327B2 (en) | 1996-09-09 | 2007-11-20 | Tracbeam Llc | Geographic location using multiple location estimators |
| US7349705B1 (en) | 1999-07-29 | 2008-03-25 | Bryan Holland | Wireless remote location system and method |
| US7366492B1 (en) | 2002-05-03 | 2008-04-29 | Verizon Corporate Services Group Inc. | Method and system for mobile location detection using handoff information |
| US7376584B1 (en) | 2001-07-31 | 2008-05-20 | Verizon Corporate Services Group Inc. | Systems and methods for fulfilling orders using location-based abbreviated dialing |
| US20080195306A1 (en)* | 2005-06-15 | 2008-08-14 | Airbiquity Inc. | Remote destination programming for vehicle navigation |
| US20090073032A1 (en)* | 2007-06-12 | 2009-03-19 | Smc Electronics, Ltd. | Apparatus, system and method for global positioning, monitoring, and communication |
| US7714778B2 (en) | 1997-08-20 | 2010-05-11 | Tracbeam Llc | Wireless location gateway and applications therefor |
| US7733853B2 (en) | 2005-01-31 | 2010-06-08 | Airbiquity, Inc. | Voice channel control of wireless packet data communications |
| US7792297B1 (en) | 1998-03-31 | 2010-09-07 | Piccionelli Greg A | System and process for limiting distribution of information on a communication network based on geographic location |
| US20100225472A1 (en)* | 2003-08-01 | 2010-09-09 | Culpepper Jerry W | Method and system for providing tracking services to locate an asset |
| US20100273470A1 (en)* | 2009-04-27 | 2010-10-28 | Airbiquity Inc. | Automatic gain control in a personal navigation device |
| US7881263B1 (en) | 2007-07-31 | 2011-02-01 | Sprint Spectrum L.P. | Method for use of azimuth and bearing data to select a serving sector for a mobile station |
| US7903029B2 (en) | 1996-09-09 | 2011-03-08 | Tracbeam Llc | Wireless location routing applications and architecture therefor |
| US7924934B2 (en) | 2006-04-07 | 2011-04-12 | Airbiquity, Inc. | Time diversity voice channel data communications |
| US7979095B2 (en) | 2007-10-20 | 2011-07-12 | Airbiquity, Inc. | Wireless in-band signaling with in-vehicle systems |
| US7983310B2 (en) | 2008-09-15 | 2011-07-19 | Airbiquity Inc. | Methods for in-band signaling through enhanced variable-rate codecs |
| US8060109B2 (en) | 1997-08-04 | 2011-11-15 | Enovsys Llc | Authorized location reporting mobile communication system |
| US8082096B2 (en) | 2001-05-22 | 2011-12-20 | Tracbeam Llc | Wireless location routing applications and architecture therefor |
| US8135413B2 (en) | 1998-11-24 | 2012-03-13 | Tracbeam Llc | Platform and applications for wireless location and other complex services |
| US8195204B1 (en) | 2007-07-25 | 2012-06-05 | Sprint Spectrum L.P. | Method and apparatus for scanning sectors in order of distance from mobile station |
| US8249865B2 (en) | 2009-11-23 | 2012-08-21 | Airbiquity Inc. | Adaptive data transmission for a digital in-band modem operating over a voice channel |
| US8258942B1 (en) | 2008-01-24 | 2012-09-04 | Cellular Tracking Technologies, LLC | Lightweight portable tracking device |
| US8418039B2 (en) | 2009-08-03 | 2013-04-09 | Airbiquity Inc. | Efficient error correction scheme for data transmission in a wireless in-band signaling system |
| US8478275B1 (en) | 2010-08-05 | 2013-07-02 | Sprint Spectrum L.P. | Conditional assignment of connection identifiers to help avoid communication errors |
| US8594138B2 (en) | 2008-09-15 | 2013-11-26 | Airbiquity Inc. | Methods for in-band signaling through enhanced variable-rate codecs |
| US8670425B1 (en) | 2011-08-09 | 2014-03-11 | Sprint Spectrum L.P. | Use of past duration of stay as trigger to scan for wireless coverage |
| US8694025B2 (en) | 1999-09-24 | 2014-04-08 | Dennis Dupray | Geographically constrained network services |
| US8848825B2 (en) | 2011-09-22 | 2014-09-30 | Airbiquity Inc. | Echo cancellation in wireless inband signaling modem |
| US9134398B2 (en) | 1996-09-09 | 2015-09-15 | Tracbeam Llc | Wireless location using network centric location estimators |
| US9538493B2 (en) | 2010-08-23 | 2017-01-03 | Finetrak, Llc | Locating a mobile station and applications therefor |
| US9875492B2 (en) | 2001-05-22 | 2018-01-23 | Dennis J. Dupray | Real estate transaction system |
| US9924216B2 (en) | 2000-03-21 | 2018-03-20 | Ted R. Rittmaster | System and process for distribution of information on a communication network |
| US10641861B2 (en) | 2000-06-02 | 2020-05-05 | Dennis J. Dupray | Services and applications for a communications network |
| US10684350B2 (en) | 2000-06-02 | 2020-06-16 | Tracbeam Llc | Services and applications for a communications network |
Families Citing this family (291)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5375161A (en) | 1984-09-14 | 1994-12-20 | Accessline Technologies, Inc. | Telephone control system with branch routing |
| US6545589B1 (en) | 1984-09-14 | 2003-04-08 | Aspect Communications Corporation | Method and apparatus for managing telecommunications |
| US5442805A (en)* | 1988-10-05 | 1995-08-15 | Motorola, Inc. | Location-based adaptive radio control |
| US5155689A (en)* | 1991-01-17 | 1992-10-13 | By-Word Technologies, Inc. | Vehicle locating and communicating method and apparatus |
| US5734981A (en)* | 1991-01-17 | 1998-03-31 | Highwaymaster Communications, Inc. | Method and apparatus for call delivery to a mobile unit |
| JP3052405B2 (en)* | 1991-03-19 | 2000-06-12 | 株式会社日立製作所 | Mobile communication system |
| US5315636A (en)* | 1991-06-28 | 1994-05-24 | Network Access Corporation | Personal telecommunications system |
| US10361802B1 (en) | 1999-02-01 | 2019-07-23 | Blanding Hovenweep, Llc | Adaptive pattern recognition based control system and method |
| US8352400B2 (en) | 1991-12-23 | 2013-01-08 | Hoffberg Steven M | Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore |
| US6324404B1 (en)* | 1991-12-26 | 2001-11-27 | Sycord Limited Partnership | Cellular telephone system that uses position of a mobile unit to make call management decisions |
| US5546445A (en)* | 1991-12-26 | 1996-08-13 | Dennison; Everett | Cellular telephone system that uses position of a mobile unit to make call management decisions |
| US5815814A (en)* | 1991-12-26 | 1998-09-29 | Sygnet Communications, Inc. | Cellular telephone system that uses position of a mobile unit to make call management decisions |
| US5454027A (en)* | 1992-01-27 | 1995-09-26 | Hm Holding Corporation | Phantom mobile identification number method and apparatus |
| US5539810A (en) | 1992-01-27 | 1996-07-23 | Highwaymaster Communications, Inc. | Data messaging in a communications network |
| US6009330A (en)* | 1992-01-27 | 1999-12-28 | Highwaymaster Communications, Inc. | Method and apparatus for call delivery to a mobile unit |
| US6295449B1 (en) | 1992-01-27 | 2001-09-25 | @Track Communications, Inc. | Data messaging in a communications network using a feature request |
| US5878345A (en)* | 1992-03-06 | 1999-03-02 | Aircell, Incorporated | Antenna for nonterrestrial mobile telecommunication system |
| US5878346A (en)* | 1992-03-06 | 1999-03-02 | Aircell Incorporated | Nonterrestrial cellular mobile telecommunication network |
| US6408180B1 (en)* | 1992-03-06 | 2002-06-18 | Aircell, Inc. | Ubiquitous mobile subscriber station |
| US5884166A (en)* | 1992-03-06 | 1999-03-16 | Aircell, Incorporated | Multidimensional cellular mobile telecommunication system |
| US5832380A (en)* | 1992-03-06 | 1998-11-03 | Aircell Incorporated | Nonterrestrial cellular mobile telecommunication system |
| US5557656A (en)* | 1992-03-06 | 1996-09-17 | Aircell, Inc. | Mobile telecommunications for aircraft and land based vehicles |
| US5600706A (en)* | 1992-04-08 | 1997-02-04 | U S West, Inc. | Method and system for determining the position of a mobile receiver |
| US5533094A (en)* | 1992-05-12 | 1996-07-02 | Telefonaktiebolaget L M Ericsson, A Corp. Of Sweden | Allocation of paging capacity in cellular applications by storing a set of page request group designations, paging extents and paging priority parameters |
| US5889474A (en)* | 1992-05-18 | 1999-03-30 | Aeris Communications, Inc. | Method and apparatus for transmitting subject status information over a wireless communications network |
| US5396540A (en)* | 1992-07-23 | 1995-03-07 | Rockwell International Corporation | Remote vehicle communications system and method |
| DE4225685A1 (en)* | 1992-08-04 | 1994-02-10 | Philips Patentverwaltung | Cellular mobile radio system |
| US5918183A (en)* | 1992-09-01 | 1999-06-29 | Trimble Navigation Limited | Concealed mobile communications system |
| IL103108A (en)* | 1992-09-08 | 1999-12-22 | Mul T Lock Ltd | Mobile communication systems |
| US7064749B1 (en) | 1992-11-09 | 2006-06-20 | Adc Technology Inc. | Portable communicator |
| IT1264320B (en)* | 1992-12-01 | 1996-09-23 | SYSTEM FOR AUTOMATICALLY DISTRIBUTING CALLS TO RADIOTAXI | |
| US5422813A (en)* | 1992-12-17 | 1995-06-06 | Stanford Telecommunications, Inc. | No-outage GPS/commercial RF positioning system |
| JP2953898B2 (en)* | 1993-02-17 | 1999-09-27 | 日本電気通信システム株式会社 | Premise wireless extension system |
| US6385312B1 (en) | 1993-02-22 | 2002-05-07 | Murex Securities, Ltd. | Automatic routing and information system for telephonic services |
| US5327144A (en)* | 1993-05-07 | 1994-07-05 | Associated Rt, Inc. | Cellular telephone location system |
| WO1994027398A1 (en)* | 1993-05-07 | 1994-11-24 | Everett Dennison | Cellular telephone system that uses position of a mobile unit to make call management decisions |
| JPH0798371A (en)* | 1993-06-08 | 1995-04-11 | Ricoh Co Ltd | Position confirmation system |
| WO1994029995A1 (en)* | 1993-06-14 | 1994-12-22 | Motorola Inc. | Cellular communication system having information retrieval and method therefor |
| GB2317536B (en)* | 1993-07-07 | 1998-07-29 | Mitsubishi Electric Corp | Mobile satellite communication system |
| US5483664A (en)* | 1993-07-26 | 1996-01-09 | Motorola, Inc. | Cellular communications with scheduled handoffs |
| US5983161A (en) | 1993-08-11 | 1999-11-09 | Lemelson; Jerome H. | GPS vehicle collision avoidance warning and control system and method |
| US5594740A (en) | 1993-08-27 | 1997-01-14 | Axion Logistics Corporation | Wireless communications application specific enabling method and apparatus |
| CA2130507A1 (en)* | 1993-11-19 | 1995-05-20 | Bernard M. Snyder | System and method for remotely tripping a switch |
| US5629693A (en) | 1993-11-24 | 1997-05-13 | Trimble Navigation Limited | Clandestine location reporting by a missing vehicle |
| CA2134395A1 (en)* | 1993-11-26 | 1995-05-27 | Keith Andrew Olds | Method and apparatus for management of automatically initiated communication |
| NL9420044A (en)* | 1994-01-03 | 1996-10-01 | Trimble Navigation | Network for differential GPS code phase corrections. |
| US6868270B2 (en)* | 1994-01-11 | 2005-03-15 | Telefonaktiebolaget L.M. Ericsson | Dual-mode methods, systems, and terminals providing reduced mobile terminal registrations |
| US6195555B1 (en)* | 1994-01-11 | 2001-02-27 | Ericsson Inc. | Method of directing a call to a mobile telephone in a dual mode cellular satellite communication network |
| EP0662758B1 (en) | 1994-01-11 | 2000-11-29 | Ericsson Inc. | Position registration for cellular satellite communication systems |
| WO1995021511A1 (en)* | 1994-02-07 | 1995-08-10 | Harold Ii Pace | Mobile location reporting apparatus and methods |
| US5778304A (en)* | 1994-03-10 | 1998-07-07 | Motorola, Inc. | Method for providing communication services based on geographic location |
| US5678194A (en)* | 1994-03-10 | 1997-10-14 | Motorola, Inc. | Method for providing geographic dependent instructions to a user of a communications unit |
| JP3399623B2 (en)* | 1994-03-16 | 2003-04-21 | 富士通株式会社 | Mobile station position acquisition device |
| US6026156A (en) | 1994-03-18 | 2000-02-15 | Aspect Telecommunications Corporation | Enhanced call waiting |
| JPH07264660A (en)* | 1994-03-18 | 1995-10-13 | Fujitsu Ltd | Mobile communication monitor method |
| US5535431A (en)* | 1994-04-05 | 1996-07-09 | Grube; Gary W. | Method of detecting unauthorized use of a communication unit |
| US5649300A (en)* | 1994-04-13 | 1997-07-15 | Rotec, A Nevada General Partnership | Message delivery system and method therefor |
| US5504491A (en)* | 1994-04-25 | 1996-04-02 | Chapman; Robert W. | Global status and position reporting system |
| US5561836A (en)* | 1994-05-02 | 1996-10-01 | Motorola, Inc. | Method and apparatus for qualifying access to communication system services based on subscriber unit location |
| US5504938A (en)* | 1994-05-02 | 1996-04-02 | Motorola, Inc. | Method and apparatus for varying apparent cell size in a cellular communication system |
| US5818385A (en)* | 1994-06-10 | 1998-10-06 | Bartholomew; Darin E. | Antenna system and method |
| US5636245A (en)* | 1994-08-10 | 1997-06-03 | The Mitre Corporation | Location based selective distribution of generally broadcast information |
| US5669061A (en)* | 1994-08-19 | 1997-09-16 | Trimble Navigation Limited | Automatic cellular phone tracking |
| GB9417128D0 (en)* | 1994-08-24 | 1994-10-12 | Plessey Semiconductors Ltd | Wirreless local area network system |
| US5596333A (en)* | 1994-08-31 | 1997-01-21 | Motorola, Inc. | Method and apparatus for conveying a communication signal between a communication unit and a base site |
| US5613209A (en)* | 1994-09-02 | 1997-03-18 | Motorola, Inc. | Method and apparatus for automatically selecting a radio talkgroup |
| US5614914A (en)* | 1994-09-06 | 1997-03-25 | Interdigital Technology Corporation | Wireless telephone distribution system with time and space diversity transmission for determining receiver location |
| US5623535A (en)* | 1994-09-08 | 1997-04-22 | Lucent Technologies Inc. | Operations of cellular communications systems based on mobility and teletraffic statistics collected by mobile units |
| US20040113794A1 (en)* | 1994-10-27 | 2004-06-17 | Dan Schlager | Self-locating personal alarm system equipped parachute |
| US6331825B1 (en) | 1994-10-31 | 2001-12-18 | Peoplenet, Inc. | Mobile locator system |
| US5594425A (en)* | 1994-10-31 | 1997-01-14 | Peoplenet, Inc. | Locator device |
| US6226529B1 (en)* | 1994-12-08 | 2001-05-01 | Itt Manufacturing Enterprises, Inc. | System for providing a simultaneous data and voice channel within a single channel of a portable cellular telephone to provide position-enhanced cellular services (PECS) |
| WO1996020542A1 (en)* | 1994-12-23 | 1996-07-04 | Stanford Telecommunications, Inc. | Position enhanced communication system |
| US5604765A (en)* | 1994-12-23 | 1997-02-18 | Stanford Telecommunications, Inc. | Position enhanced communication system including system for embedding CDMA navigation beacons under the communications signals of a wireless communication system |
| US5867765A (en)* | 1995-03-31 | 1999-02-02 | Telefonaktiebolaget Lm Ericsson | Non-geostationary satellite mobile communication system integration with network principles for terrestrial cellular |
| US5812522A (en)* | 1995-03-31 | 1998-09-22 | Airtouch Communications, Inc. | Location-ruled radio-integrated network |
| US5699275A (en)* | 1995-04-12 | 1997-12-16 | Highwaymaster Communications, Inc. | System and method for remote patching of operating code located in a mobile unit |
| CA2172564C (en)* | 1995-04-28 | 1999-12-28 | Mark Jeffrey Foladare | Call redirection system |
| US5694322A (en)* | 1995-05-09 | 1997-12-02 | Highwaymaster Communications, Inc. | Method and apparatus for determining tax of a vehicle |
| US5778315A (en)* | 1995-05-16 | 1998-07-07 | Teletrac, Inc. | Integrated mobile unit location services and cellular telephone services |
| US5568153A (en)* | 1995-05-30 | 1996-10-22 | Telefonaktiebolaget Lm Ericsson | Individually defined personal home area for subscribers in a cellular telecommunications network |
| US6044265A (en)* | 1995-06-05 | 2000-03-28 | Bellsouth Corporation | Methods and apparatus for cellular set programming |
| WO1996041488A1 (en)* | 1995-06-07 | 1996-12-19 | The Dice Company | Fraud detection system for electronic networks using geographical location coordinates |
| US5678182A (en)* | 1995-06-19 | 1997-10-14 | Trimble Navigation Limited | Self-locating radio system that automatically configures to the radio regulations for the location |
| MX9800265A (en)* | 1995-07-12 | 1998-04-30 | Ericsson Telefon Ab L M | Method and apparatus for providing fixed cellular functionality. |
| US5815809A (en)* | 1996-04-16 | 1998-09-29 | Amsc Subsidiary Corporation | Mobile earth terminal communication device providing voice, data, facsimile, and/or roaming communication features |
| CA2229615C (en)* | 1995-08-15 | 2002-10-29 | Amsc Subsidiary Corporation | Improved mobile earth terminal |
| US5831545A (en)* | 1995-08-25 | 1998-11-03 | Motorola, Inc. | Method and apparatus for adjusting a communication strategy in a radio communication system using location |
| US6411682B1 (en) | 1995-09-21 | 2002-06-25 | Aspect Telecommunications Corporation | Computer controlled paging and telephone communication system and method |
| US5754955A (en)* | 1995-09-22 | 1998-05-19 | Telefonaktiebolaget Lm Ericsson | Providing mobile communications system services in dependence on identification of cell where a mobile-originated call was initiated |
| US6272316B1 (en) | 1995-11-17 | 2001-08-07 | Globalstar L.P. | Mobile satellite user information request system and methods |
| US5812932A (en)* | 1995-11-17 | 1998-09-22 | Globalstar L.P. | Mobile satellite user information request system and methods |
| US5787347A (en)* | 1995-12-11 | 1998-07-28 | Gte Laboratories Incorporated | Method and apparatus for selecting a cellular system for communication with a cellular telephone in a roaming area |
| US5999808A (en)* | 1995-12-12 | 1999-12-07 | Aeris Communications, Inc. | Wireless gaming method |
| US5835907A (en)* | 1995-12-20 | 1998-11-10 | Mci Communications Corporation | Emergency PCS system for identification and notification of a subscriber's location |
| WO1997024010A1 (en)* | 1995-12-22 | 1997-07-03 | Bell Communications Research, Inc. | Personal location services using a personal communication service mobility management infrastructure |
| US5845203A (en)* | 1996-01-25 | 1998-12-01 | Aertis Cormmunications | Remote access application messaging wireless method |
| US7305243B1 (en) | 1996-02-28 | 2007-12-04 | Tendler Cellular, Inc. | Location based information system |
| US6519463B2 (en)* | 1996-02-28 | 2003-02-11 | Tendler Cellular, Inc. | Location based service request system |
| JP2803626B2 (en)* | 1996-04-05 | 1998-09-24 | 日本電気株式会社 | Transmission power control method for mobile radio terminals |
| US5774802A (en)* | 1996-04-10 | 1998-06-30 | Motorola Inc. | Apparatus and method for billing in a wireless communication system |
| US6829484B1 (en) | 1996-04-24 | 2004-12-07 | Fujitsu Limited | Mobile communicating system, and a mobile terminal, an information center and a storage medium used therein |
| JP3370526B2 (en)* | 1996-04-24 | 2003-01-27 | 富士通株式会社 | Mobile communication system and mobile terminal and information center used in the mobile communication system |
| US5901214A (en)* | 1996-06-10 | 1999-05-04 | Murex Securities, Ltd. | One number intelligent call processing system |
| US5926761A (en)* | 1996-06-11 | 1999-07-20 | Motorola, Inc. | Method and apparatus for mitigating the effects of interference in a wireless communication system |
| US5870667A (en)* | 1996-06-14 | 1999-02-09 | Mediaone Group, Inc. | Support system architecture for use in a communications network environment enabling automatic provisioning, change in service and maintenance |
| US5812086A (en)* | 1996-06-27 | 1998-09-22 | Motorola, Inc. | Method and apparatus for providing duplex communication service in geographical areas where conventional services are obstructed |
| US5784028A (en)* | 1996-06-27 | 1998-07-21 | Motorola, Inc. | Method and apparatus for simplex delivery of signals to obstructed geographical areas |
| US5857155A (en)* | 1996-07-10 | 1999-01-05 | Motorola, Inc. | Method and apparatus for geographic based control in a communication system |
| US6199045B1 (en) | 1996-08-15 | 2001-03-06 | Spatial Adventures, Inc. | Method and apparatus for providing position-related information to mobile recipients |
| US6985742B1 (en)* | 1996-08-15 | 2006-01-10 | Spatial Adventures, Inc. | Method and apparatus for providing position-related information to mobile recipients |
| US8526971B2 (en) | 1996-08-15 | 2013-09-03 | Snaptrack, Inc. | Method and apparatus for providing position-related information to mobile recipients |
| US5966658A (en)* | 1996-09-26 | 1999-10-12 | Highwaymaster Communications, Inc. | Automated selection of a communication path |
| US6233456B1 (en)* | 1996-09-27 | 2001-05-15 | Qualcomm Inc. | Method and apparatus for adjacent coverage area handoff in communication systems |
| US5946615A (en)* | 1996-10-08 | 1999-08-31 | At&T Wireless | Mobile network geographic address translation |
| US6512481B1 (en)* | 1996-10-10 | 2003-01-28 | Teratech Corporation | Communication system using geographic position data |
| US5898680A (en)* | 1996-11-05 | 1999-04-27 | Worldspace, Inc. | System for providing location-specific data to a user |
| US5983101A (en)* | 1996-11-26 | 1999-11-09 | Telefonaktiebolaget Lm Ericsson | Point to multipoint radio access system |
| US6011973A (en)* | 1996-12-05 | 2000-01-04 | Ericsson Inc. | Method and apparatus for restricting operation of cellular telephones to well delineated geographical areas |
| US6009355A (en) | 1997-01-28 | 1999-12-28 | American Calcar Inc. | Multimedia information and control system for automobiles |
| GB2321812B (en)* | 1997-02-01 | 2001-02-21 | Ico Services Ltd | User terminal positioning system and method employing external signals |
| US6044261A (en)* | 1997-03-19 | 2000-03-28 | Ericsson, Inc. | Multiple home zone areas within a mobile telecommunications network |
| US5930713A (en)* | 1997-05-28 | 1999-07-27 | Telefonaktiebolaget L M Ericsson (Publ) | Proactive communication of mobile station position information following inter-exchange handoff |
| JPH10336101A (en)* | 1997-05-30 | 1998-12-18 | Oki Electric Ind Co Ltd | Use managing system for portable telephone |
| US6091956A (en)* | 1997-06-12 | 2000-07-18 | Hollenberg; Dennis D. | Situation information system |
| AU3434997A (en)* | 1997-06-17 | 1999-01-04 | Motorola Limited | Wireless device, control system and methods for protected sites with operation according to interference parameters |
| US6055426A (en)* | 1997-06-17 | 2000-04-25 | Highwaymaster Communications, Inc. | Notification of a mobile unit out of coverage |
| US6133853A (en) | 1998-07-30 | 2000-10-17 | American Calcar, Inc. | Personal communication and positioning system |
| US6148261A (en) | 1997-06-20 | 2000-11-14 | American Calcar, Inc. | Personal communication system to send and receive voice data positioning information |
| US6140956A (en)* | 1997-06-25 | 2000-10-31 | Cellutrac, Inc. | Vehicle tracking and security system incorporating simultaneous voice and data communication |
| US6522265B1 (en) | 1997-06-25 | 2003-02-18 | Navox Corporation | Vehicle tracking and security system incorporating simultaneous voice and data communication |
| US6097938A (en)* | 1997-07-11 | 2000-08-01 | Northern Telecom Limited | Authentication and tracking system for a cellular telephone |
| US6230017B1 (en)* | 1997-07-31 | 2001-05-08 | Telefonaktiebolaget Lm Ericsson | Geographical restriction in cellular telecommunications network |
| US6275231B1 (en) | 1997-08-01 | 2001-08-14 | American Calcar Inc. | Centralized control and management system for automobiles |
| FI973663A7 (en)* | 1997-09-11 | 1999-03-12 | Nokia Corp | Mobile phone system |
| US6047183A (en)* | 1997-10-30 | 2000-04-04 | Ericsson Inc. | Selection of positioning handover candidates based on angle |
| SE9704764L (en) | 1997-12-19 | 1999-06-20 | Ericsson Telefon Ab L M | Method and device in a communication network |
| KR100269861B1 (en)* | 1997-12-20 | 2000-10-16 | 김영환 | Frequency hard hand off point determination method for software |
| US5950132A (en)* | 1997-12-21 | 1999-09-07 | Motorola, Inc. | Method and apparatus for providing communication services for communication system users having variable speed |
| US20020176009A1 (en)* | 1998-05-08 | 2002-11-28 | Johnson Sandra Marie | Image processor circuits, systems, and methods |
| US6161015A (en)* | 1998-05-28 | 2000-12-12 | Motorola, Inc. | Method for improving communication coverage in multi-cell communication systems using location information |
| CA2337508A1 (en) | 1998-07-20 | 2000-01-27 | Signalsoft Corp. | Subscriber delivered location-based services |
| WO2000007388A1 (en)* | 1998-07-30 | 2000-02-10 | Mitsubishi Denki Kabushiki Kaisha | Mobile communication system |
| WO2000013336A1 (en)* | 1998-08-26 | 2000-03-09 | Ameritech Corporation | Location system and method |
| WO2000024131A1 (en) | 1998-10-21 | 2000-04-27 | American Calcar, Inc. | Positional camera and gps data interchange device |
| US6442393B1 (en)* | 1998-11-06 | 2002-08-27 | Telefonaktiebolaget L M Ericsson (Publ) | Use of mobile locating and power control for radio network optimization |
| US6266514B1 (en) | 1998-11-06 | 2001-07-24 | Telefonaktiebolaget Lm Ericsson | Poor network coverage mapping |
| US6411826B1 (en) | 1998-11-17 | 2002-06-25 | Ericsson Inc. | Portable radiotelephones including patch antennas having openings therein |
| WO2000035234A1 (en)* | 1998-12-07 | 2000-06-15 | Mitsubishi Denki Kabushiki Kaisha | Mobile communication device and mobile communication system |
| US6218984B1 (en)* | 1998-12-17 | 2001-04-17 | Trimble Navigation Limited | Geo-referencing radio position determination systems using co-located antennas |
| US6466788B1 (en)* | 1998-12-21 | 2002-10-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for transferring position data between terminals in wireless communications systems |
| US6351642B1 (en) | 1998-12-22 | 2002-02-26 | Telefonaktiebolaget Lm Ericsson (Publ) | CDMA soft hand-off |
| US6597906B1 (en)* | 1999-01-29 | 2003-07-22 | International Business Machines Corporation | Mobile client-based station communication based on relative geographical position information |
| US7904187B2 (en) | 1999-02-01 | 2011-03-08 | Hoffberg Steven M | Internet appliance system and method |
| US6304216B1 (en)* | 1999-03-30 | 2001-10-16 | Conexant Systems, Inc. | Signal detector employing correlation analysis of non-uniform and disjoint sample segments |
| US6556553B1 (en)* | 1999-04-12 | 2003-04-29 | Intermec Ip Corp. | Method for determining when a communication device should rate shift or roam in a wireless environment |
| US7196659B1 (en) | 1999-05-07 | 2007-03-27 | Garmin Corporation | Combined global positioning system receiver and radio |
| US6373430B1 (en) | 1999-05-07 | 2002-04-16 | Gamin Corporation | Combined global positioning system receiver and radio |
| US7330150B1 (en) | 1999-05-07 | 2008-02-12 | Garmin Corporation | Combined global positioning system receiver and radio |
| US6372494B1 (en)* | 1999-05-14 | 2002-04-16 | Advanced Tissue Sciences, Inc. | Methods of making conditioned cell culture medium compositions |
| US8065155B1 (en)* | 1999-06-10 | 2011-11-22 | Gazdzinski Robert F | Adaptive advertising apparatus and methods |
| JP3772049B2 (en)* | 1999-06-29 | 2006-05-10 | 富士通株式会社 | Connection control method and apparatus for mobile communication system |
| US7356390B2 (en) | 1999-06-29 | 2008-04-08 | Space Data Corporation | Systems and applications of lighter-than-air (LTA) platforms |
| US7203491B2 (en) | 2001-04-18 | 2007-04-10 | Space Data Corporation | Unmanned lighter-than-air safe termination and recovery methods |
| US6628941B2 (en) | 1999-06-29 | 2003-09-30 | Space Data Corporation | Airborne constellation of communications platforms and method |
| US8255149B2 (en)* | 1999-07-12 | 2012-08-28 | Skybitz, Inc. | System and method for dual-mode location determination |
| US6539230B2 (en)* | 1999-08-19 | 2003-03-25 | Lucent Technologies Inc. | Dynamic maintenance of location dependent operating parameters in a wireless terminal |
| JP2001061176A (en) | 1999-08-20 | 2001-03-06 | Pioneer Electronic Corp | Communication system |
| KR100845568B1 (en) | 1999-10-19 | 2008-07-10 | 아메리칸 캘카어 인코포레이티드 | Technique for effective navigation based on user preferences |
| US7475057B1 (en) | 1999-10-27 | 2009-01-06 | American Calcar, Inc. | System and method for user navigation |
| US6347216B1 (en) | 1999-11-04 | 2002-02-12 | Xm Satellite Radio Inc. | Method and system for providing geographic specific services in a satellite communications network |
| US6876991B1 (en) | 1999-11-08 | 2005-04-05 | Collaborative Decision Platforms, Llc. | System, method and computer program product for a collaborative decision platform |
| US6654362B1 (en) | 1999-11-24 | 2003-11-25 | Lucent Technologies, Inc. | Use of location in handoff in wireless communication systems |
| US6496703B1 (en)* | 1999-12-13 | 2002-12-17 | Lucent Technologies Inc. | System for disabling wireless communication devices |
| US6405034B1 (en) | 2000-01-28 | 2002-06-11 | Leap Wireless International, Inc. | Adaptive communication data retrieval system |
| US6545642B1 (en)* | 2000-02-09 | 2003-04-08 | Ericsson Inc. | Antenna/push-button assembly and portable radiotelephone including the same |
| JP3860381B2 (en)* | 2000-02-29 | 2006-12-20 | 富士通株式会社 | Tourist information system |
| US6721572B1 (en) | 2000-03-24 | 2004-04-13 | International Business Machines Corporation | Mobile communication optimization near wireless dead zone regions |
| CA2405060A1 (en) | 2000-04-11 | 2001-10-18 | American Calcar, Inc. | Gps publication application server |
| JP3512090B2 (en)* | 2000-05-31 | 2004-03-29 | 日本電気株式会社 | System and method for switching reception base station of mobile terminal |
| JP2002044248A (en)* | 2000-06-09 | 2002-02-08 | Internatl Business Mach Corp <Ibm> | Method of calling one or more land telephones or portable telephones selectively based on self-detected position of portable telephone and telephone system |
| US6975874B1 (en)* | 2000-06-09 | 2005-12-13 | International Business Machines Corporation | Portable phone that changes function according to its self-detected geographical position |
| US7062279B2 (en) | 2000-06-22 | 2006-06-13 | Openwave Systems Inc. | Anonymous positioning of a wireless unit for data network location-based services |
| US6847892B2 (en)* | 2001-10-29 | 2005-01-25 | Digital Angel Corporation | System for localizing and sensing objects and providing alerts |
| US6559620B2 (en) | 2001-03-21 | 2003-05-06 | Digital Angel Corporation | System and method for remote monitoring utilizing a rechargeable battery |
| DE10033135C2 (en)* | 2000-07-07 | 2002-05-23 | Microcom Gmbh | Procedure for automatic frequency switching in mobile radio |
| AU2001278953A1 (en)* | 2000-07-28 | 2002-02-13 | American Calcar, Inc. | Technique for effective organization and communication of information |
| US8990367B2 (en)* | 2006-09-29 | 2015-03-24 | Dell Products L.P. | Consistent binding of shared storage across clustered servers |
| EP1328420A4 (en) | 2000-09-21 | 2009-03-04 | American Calcar Inc | TECHNIQUE FOR OPERATING A VEHICLE EFFECTIVELY AND SECURELY |
| US7243075B1 (en)* | 2000-10-03 | 2007-07-10 | Shaffer James D | Real-time process for defining, processing and delivering a highly customized contact list over a network |
| US6895246B2 (en) | 2000-12-14 | 2005-05-17 | Motorola, Inc. | Method and apparatus for optimal system control parameter assignments based on mobile location |
| US6799116B2 (en) | 2000-12-15 | 2004-09-28 | Trimble Navigation Limited | GPS correction methods, apparatus and signals |
| US7130643B2 (en)* | 2001-01-12 | 2006-10-31 | International Business Machines Corporation | Method and system for selectively paging a communication device based on self-detected position of the communication device |
| DE10103272A1 (en)* | 2001-01-25 | 2002-08-01 | Gap Ag Gsm Applikationen Und P | Mobile location device has hybrid radio module that can transmit radio signals according to at least two different transmission standards acceptable to a mobile radio fixed system |
| US7006846B2 (en)* | 2001-03-08 | 2006-02-28 | Northrop Grumman Corporation | Credit card communication system |
| US6973333B1 (en)* | 2001-04-10 | 2005-12-06 | At&T Corp. | Modification of portable communications device operation in vehicles |
| US9632503B2 (en) | 2001-04-18 | 2017-04-25 | Space Data Corporation | Systems and applications of lighter-than-air (LTA) platforms |
| US9643706B2 (en) | 2001-04-18 | 2017-05-09 | Space Data Corporation | Systems and applications of lighter-than-air (LTA) platforms |
| US9908608B2 (en) | 2001-04-18 | 2018-03-06 | Space Data Corporation | Systems and applications of lighter-than-air (LTA) platforms |
| US6985746B2 (en) | 2001-04-30 | 2006-01-10 | Ipr Licensing, Inc. | Wireless communication system having mobility-based content delivery |
| GB2380355B (en)* | 2001-08-03 | 2003-08-06 | Hutchison Whampoa Entpr Ltd | Mobile telephone communications networks |
| US7024220B2 (en)* | 2001-10-09 | 2006-04-04 | Kyocera Wireless Corp. | GPS receiver system and method |
| US7142900B1 (en)* | 2001-11-01 | 2006-11-28 | Garmin Ltd. | Combined global positioning system receiver and radio |
| US7080544B2 (en)* | 2002-08-23 | 2006-07-25 | Firemaster Oilfield Services Inc. | Apparatus system and method for gas well site monitoring |
| US6816782B1 (en) | 2002-10-10 | 2004-11-09 | Garmin Ltd. | Apparatus, systems and methods for navigation data transfer between portable devices |
| US7751826B2 (en)* | 2002-10-24 | 2010-07-06 | Motorola, Inc. | System and method for E911 location privacy protection |
| US6768450B1 (en) | 2002-11-07 | 2004-07-27 | Garmin Ltd. | System and method for wirelessly linking a GPS device and a portable electronic device |
| US9818136B1 (en) | 2003-02-05 | 2017-11-14 | Steven M. Hoffberg | System and method for determining contingent relevance |
| US20050020240A1 (en)* | 2003-02-07 | 2005-01-27 | Darin Minter | Private wireless network |
| GB2407937B (en)* | 2003-11-07 | 2007-08-22 | Excuse Me Invest Ltd | Position locating system |
| US20060167952A1 (en)* | 2004-02-24 | 2006-07-27 | First Data Corporation | Communication point bulk mail |
| US20050187870A1 (en)* | 2004-02-24 | 2005-08-25 | First Data Corporation | System for maintaining balance data |
| US20070237315A1 (en)* | 2004-02-24 | 2007-10-11 | First Data Corporation | System for maintaining type and/or status information for a party - communication point relationship |
| US20050185774A1 (en)* | 2004-02-24 | 2005-08-25 | First Data Corporation | System for maintaining communication point data |
| US20060184585A1 (en)* | 2004-02-24 | 2006-08-17 | First Data Corporation | Communication point delivery instructions |
| US20070239786A1 (en)* | 2004-02-24 | 2007-10-11 | First Data Corporation | System for maintaining regulatory compliance of communication point data |
| US20060184586A1 (en)* | 2004-02-24 | 2006-08-17 | First Data Corporation | Communication point relationship scheduling |
| US7768975B2 (en)* | 2004-03-29 | 2010-08-03 | Telecordia Technologies, Inc. | Fast handoff using GPS technology for mobile telematics |
| US20060079218A1 (en)* | 2004-10-13 | 2006-04-13 | Tylu Wireless Technology, Inc. | Filtered wireless communications |
| SG157355A1 (en)* | 2004-10-29 | 2009-12-29 | Skyhook Wireless Inc | Location beacon database and server, method of building location beacon database, and location based service using same |
| US8369264B2 (en) | 2005-10-28 | 2013-02-05 | Skyhook Wireless, Inc. | Method and system for selecting and providing a relevant subset of Wi-Fi location information to a mobile client device so the client device may estimate its position with efficient utilization of resources |
| US8244272B2 (en) | 2005-02-22 | 2012-08-14 | Skyhook Wireless, Inc. | Continuous data optimization of moved access points in positioning systems |
| US7323982B2 (en) | 2004-11-05 | 2008-01-29 | Wirelesswerx International, Inc. | Method and system to control movable entities |
| US7881733B2 (en) | 2004-11-05 | 2011-02-01 | Wirelesswerx International, Inc. | Method and system to monitor and control devices utilizing wireless media |
| KR101223836B1 (en)* | 2004-12-06 | 2013-01-17 | 알까뗄 루슨트 | System for call setup in mobile terminal |
| US7826835B2 (en)* | 2004-12-16 | 2010-11-02 | Intel Corporation | Mobile phone policy management |
| US7908080B2 (en) | 2004-12-31 | 2011-03-15 | Google Inc. | Transportation routing |
| US8260322B2 (en)* | 2005-02-15 | 2012-09-04 | Trimble Navigation Limited | Method for locating coverage gaps in wireless communication services |
| US7236766B2 (en)* | 2005-03-31 | 2007-06-26 | Tylu Wireless Technologies, Inc. | Filtered wireless communications |
| US20060223542A1 (en)* | 2005-03-31 | 2006-10-05 | Comroe Richard A | Filtered wireless communications |
| US7489939B2 (en)* | 2005-04-13 | 2009-02-10 | Wirelesswerx International, Inc. | Method and system for providing location updates |
| US20060234727A1 (en)* | 2005-04-13 | 2006-10-19 | Wirelesswerx International, Inc. | Method and System for Initiating and Handling an Emergency Call |
| US7684782B2 (en)* | 2005-04-13 | 2010-03-23 | Wirelesswerx International, Inc. | Method and system for initiating and handling an emergency call utilizing geographical zones |
| US7930211B2 (en) | 2005-04-20 | 2011-04-19 | At&T Intellectual Property I, L.P. | System and method of providing advertisements to portable communication devices |
| US8015064B2 (en)* | 2005-04-20 | 2011-09-06 | At&T Intellectual Property I, Lp | System and method of providing advertisements to cellular devices |
| US8027877B2 (en)* | 2005-04-20 | 2011-09-27 | At&T Intellectual Property I, L.P. | System and method of providing advertisements to mobile devices |
| US8054924B2 (en)* | 2005-05-17 | 2011-11-08 | General Motors Llc | Data transmission method with phase shift error correction |
| US7330122B2 (en) | 2005-08-10 | 2008-02-12 | Remotemdx, Inc. | Remote tracking and communication device |
| US9818120B2 (en) | 2015-02-20 | 2017-11-14 | Innovative Global Systems, Llc | Automated at-the-pump system and method for managing vehicle fuel purchases |
| US7117075B1 (en) | 2005-08-15 | 2006-10-03 | Report On Board Llc | Driver activity and vehicle operation logging and reporting |
| US8626377B2 (en) | 2005-08-15 | 2014-01-07 | Innovative Global Systems, Llc | Method for data communication between a vehicle and fuel pump |
| US7327107B2 (en)* | 2005-08-24 | 2008-02-05 | Wayne-Dalton Corp. | System and methods for automatically moving access barriers initiated by mobile transmitter devices |
| US20070046428A1 (en)* | 2005-08-24 | 2007-03-01 | Wayne-Dalton Corporation | System and methods for automatically moving access barriers initiated by mobile transmitter devices |
| US7327108B2 (en)* | 2005-08-24 | 2008-02-05 | Wayne-Dalton Corp. | System and methods for automatically moving access barriers initiated by mobile transmitter devices |
| US8058970B2 (en)* | 2005-08-24 | 2011-11-15 | Homerun Holdings Corporation | System and methods for automatically moving access barriers initiated by mobile transmitter devices |
| US8874477B2 (en) | 2005-10-04 | 2014-10-28 | Steven Mark Hoffberg | Multifactorial optimization system and method |
| US8194779B2 (en)* | 2005-10-24 | 2012-06-05 | General Motors Llc | Method for data communication via a voice channel of a wireless communication network |
| US8194526B2 (en)* | 2005-10-24 | 2012-06-05 | General Motors Llc | Method for data communication via a voice channel of a wireless communication network |
| US8259840B2 (en)* | 2005-10-24 | 2012-09-04 | General Motors Llc | Data communication via a voice channel of a wireless communication network using discontinuities |
| US8594933B2 (en)* | 2006-02-09 | 2013-11-26 | Sap Ag | Transmission of sensor data based on geographical navigation data |
| US20070190950A1 (en)* | 2006-02-15 | 2007-08-16 | General Motors Corporation | Method of configuring voice and data communication over a voice channel |
| US7925320B2 (en) | 2006-03-06 | 2011-04-12 | Garmin Switzerland Gmbh | Electronic device mount |
| US8797210B2 (en) | 2006-07-14 | 2014-08-05 | Securealert, Inc. | Remote tracking device and a system and method for two-way voice communication between the device and a monitoring center |
| US7936262B2 (en) | 2006-07-14 | 2011-05-03 | Securealert, Inc. | Remote tracking system with a dedicated monitoring center |
| US7737841B2 (en) | 2006-07-14 | 2010-06-15 | Remotemdx | Alarm and alarm management system for remote tracking devices |
| US8509728B2 (en)* | 2006-10-31 | 2013-08-13 | Qualcomm Incorporated | Emergency call handling in a wireless communication system |
| US8761718B2 (en)* | 2006-11-30 | 2014-06-24 | West Corporation | Verification of communications network-derived location information |
| EP3177046A1 (en)* | 2007-03-07 | 2017-06-07 | Wirelesswerx International, Inc. | Method and system for providing area specific messaging |
| US9048784B2 (en)* | 2007-04-03 | 2015-06-02 | General Motors Llc | Method for data communication via a voice channel of a wireless communication network using continuous signal modulation |
| US7912149B2 (en)* | 2007-05-03 | 2011-03-22 | General Motors Llc | Synchronization and segment type detection method for data transmission via an audio communication system |
| US8675680B2 (en)* | 2007-07-16 | 2014-03-18 | Sige Semiconductor, Inc. | Jurisdiction based parameter setting for wireless transceivers |
| US8285245B2 (en)* | 2007-08-30 | 2012-10-09 | Wirelesswerx International, Inc. | Messaging in a multi-dimensional space |
| US8612278B1 (en) | 2013-03-06 | 2013-12-17 | Wirelesswerx International, Inc. | Controlling queuing in a defined location |
| US8200186B2 (en) | 2007-08-30 | 2012-06-12 | Wirelesswerx International, Inc. | Emergency control in a multi-dimensional space |
| US8315203B2 (en)* | 2007-08-30 | 2012-11-20 | Wirelesswerx International, Inc. | Mapping in a multi-dimensional space |
| US8428867B2 (en)* | 2007-08-30 | 2013-04-23 | Wirelesswerx International, Inc. | Configuring and using multi-dimensional zones |
| US8232876B2 (en) | 2008-03-07 | 2012-07-31 | Securealert, Inc. | System and method for monitoring individuals using a beacon and intelligent remote tracking device |
| US8155666B2 (en) | 2008-06-16 | 2012-04-10 | Skyhook Wireless, Inc. | Methods and systems for determining location using a cellular and WLAN positioning system by selecting the best cellular positioning system solution |
| US8688144B1 (en)* | 2008-09-09 | 2014-04-01 | Marvell International Ltd. | Method and apparatus to configure mobile communication and applications |
| US20100111035A1 (en)* | 2008-11-05 | 2010-05-06 | Suat Eskicioglu | Location-based handovers from a macrocell to a femtocell using periodic measurement reporting |
| US8862137B2 (en) | 2008-11-05 | 2014-10-14 | Alcatel Lucent | Method for associating a premier femtocell with user equipment |
| US8494695B2 (en) | 2009-09-02 | 2013-07-23 | General Electric Company | Communications system and method for a rail vehicle |
| US8154451B2 (en)* | 2009-09-13 | 2012-04-10 | Robert Mitchell Zimmerman | Adaptive use of polarization as a means of increased wireless channel capacity |
| US8638256B2 (en) | 2009-09-29 | 2014-01-28 | Skyhook Wireless, Inc. | Accuracy and performance of a hybrid positioning system |
| US20110173055A1 (en)* | 2010-01-08 | 2011-07-14 | Saugatuck Media Llc | System and methods for advertising on a mobile electronic device |
| US20110173072A1 (en)* | 2010-01-08 | 2011-07-14 | David Ross | Systems and methods for advertising on a mobile electronic device |
| US8514070B2 (en) | 2010-04-07 | 2013-08-20 | Securealert, Inc. | Tracking device incorporating enhanced security mounting strap |
| US9413836B2 (en) | 2010-04-08 | 2016-08-09 | At&T Intellectual Property I, L.P. | Communication routing based on presence in a confined wireless environment |
| US8792419B2 (en)* | 2010-04-08 | 2014-07-29 | At&T Intellectual Property I, L.P. | Presence-based communication routing service and regulation of same |
| US8965447B1 (en) | 2010-08-24 | 2015-02-24 | Cellco Partnership | Location based network selection |
| US8890746B2 (en) | 2010-11-03 | 2014-11-18 | Skyhook Wireless, Inc. | Method of and system for increasing the reliability and accuracy of location estimation in a hybrid positioning system |
| US8738071B2 (en) | 2010-12-02 | 2014-05-27 | Cellco Partnership | Location based idle mobile frequency selection |
| US8712468B1 (en) | 2011-01-20 | 2014-04-29 | Cellco Partnership | Mobile device mode control based on dual mapping of availability (presence) information |
| US8542097B2 (en) | 2011-04-13 | 2013-09-24 | Jingle Technologies Llc | Systems and methods for transmitting information, alerts, and/or comments to participants based on location information |
| US20130158847A1 (en)* | 2011-12-16 | 2013-06-20 | Continental Automotive Systems, Inc. | Configurable traffic zone control system |
| US9551588B2 (en) | 2014-08-29 | 2017-01-24 | The Nielsen Company, LLC | Methods and systems to determine consumer locations based on navigational voice cues |
| CA2972381A1 (en) | 2014-12-24 | 2016-06-30 | Space Data Corporation | Techniques for intelligent balloon/airship launch and recovery window location |
| CA2972348C (en) | 2014-12-24 | 2023-03-14 | Space Data Corporation | Breaking apart a platform upon pending collision |
| US10059421B2 (en) | 2014-12-30 | 2018-08-28 | Space Data Corporation | Multifunctional balloon membrane |
| US9530141B2 (en)* | 2016-06-22 | 2016-12-27 | Nicolas Garcia | Zoning, license, and position matching to provide service |
| CN117978256A (en)* | 2020-02-11 | 2024-05-03 | Oppo广东移动通信有限公司 | Non-terrestrial communication network NTN switching method, equipment and storage medium |
Citations (65)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR398773A (en)* | 1908-04-06 | 1909-06-14 | Eunice Packer | Device for tracing on fabrics, etc. |
| GB292182A (en)* | 1926-12-15 | 1928-06-15 | Aldenham Press Ltd | Improvements in or relating to paper folding apparatus |
| US4144411A (en)* | 1976-09-22 | 1979-03-13 | Bell Telephone Laboratories, Incorporated | Cellular radiotelephone system structured for flexible use of different cell sizes |
| US4161734A (en)* | 1977-10-17 | 1979-07-17 | General Electric Company | Position surveillance using one active ranging satellite and time of arrival of a signal from an independent satellite |
| US4177466A (en)* | 1977-11-16 | 1979-12-04 | Lo-Jack Corporation | Auto theft detection system |
| US4229620A (en)* | 1978-11-09 | 1980-10-21 | Bell Telephone Laboratories, Incorporated | Mobile radiotelephone station two-way ranging system |
| US4232317A (en)* | 1978-11-01 | 1980-11-04 | Freeny Jr Charles C | Quantized hyperbolic and inverse hyperbolic object location system |
| US4233473A (en)* | 1978-08-31 | 1980-11-11 | Frost Edward G | Comprehensive automatic mobile radio telephone system |
| EP0199266A1 (en)* | 1985-04-17 | 1986-10-29 | Siemens Aktiengesellschaft | Mobile radio system |
| US4700374A (en)* | 1984-07-06 | 1987-10-13 | Alcatel N.V. | Mobile telephone location system |
| US4788711A (en)* | 1985-11-25 | 1988-11-29 | Cellular Communications Corporation | Apparatus and method for a cellular freeway emergency telephone service |
| US4799062A (en)* | 1987-04-27 | 1989-01-17 | Axonn Corporation | Radio position determination method and apparatus |
| US4812852A (en)* | 1987-02-20 | 1989-03-14 | Scientific Development Corporation | Locating system and method |
| US4818998A (en)* | 1986-03-31 | 1989-04-04 | Lo-Jack Corporation | Method of and system and apparatus for locating and/or tracking stolen or missing vehicles and the like |
| US4888593A (en)* | 1987-12-15 | 1989-12-19 | Signal Science, Inc. | Time difference of arrival geolocation method, etc. |
| US4908629A (en)* | 1986-03-31 | 1990-03-13 | Lo-Jack Corporation | Apparatus for locating and/or tracking stolen or missing vehicles and the like |
| US4914651A (en)* | 1988-09-20 | 1990-04-03 | Cellular Data, Inc. | Cellular data system |
| US4939522A (en)* | 1989-05-15 | 1990-07-03 | Bechtel Group, Inc. | Method and system for monitoring vehicle location |
| JPH02210923A (en)* | 1989-02-09 | 1990-08-22 | Sharp Corp | Travelling object communication system |
| US4972456A (en)* | 1989-02-10 | 1990-11-20 | Gte Mobilnet Incorporated | Rural radiotelephone system |
| US4977399A (en)* | 1988-08-09 | 1990-12-11 | At&E Corporation | Mobile radio paging test system |
| US5043736A (en)* | 1990-07-27 | 1991-08-27 | Cae-Link Corporation | Cellular position locating system |
| US5054110A (en)* | 1989-12-29 | 1991-10-01 | Motorola, Inc. | Multi-site dispatching system cell registration |
| US5056109A (en)* | 1989-11-07 | 1991-10-08 | Qualcomm, Inc. | Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system |
| US5081667A (en)* | 1989-05-01 | 1992-01-14 | Clifford Electronics, Inc. | System for integrating a cellular telephone with a vehicle security system |
| US5081703A (en)* | 1990-06-27 | 1992-01-14 | Pactel Corporation | Satellite mobile communication system for rural service areas |
| US5086452A (en)* | 1988-06-13 | 1992-02-04 | Kabushiki Kaisha Toshiba | Radio telephone system and its control method |
| WO1992002105A1 (en)* | 1990-07-25 | 1992-02-06 | British Telecommunications Public Limited Company | Location determination and handover in mobile radio systems |
| US5093925A (en)* | 1990-04-25 | 1992-03-03 | Motorola, Inc. | Three dimensional cellular communication system with coordinate offset and frequency reuse |
| US5155689A (en)* | 1991-01-17 | 1992-10-13 | By-Word Technologies, Inc. | Vehicle locating and communicating method and apparatus |
| US5170490A (en)* | 1990-09-28 | 1992-12-08 | Motorola, Inc. | Radio functions due to voice compression |
| US5187805A (en)* | 1989-10-02 | 1993-02-16 | Motorola, Inc. | Telemetry, tracking and control for satellite cellular communication systems |
| US5214789A (en)* | 1989-11-17 | 1993-05-25 | Uniden America Corporation | Radio channel allocation based on location of mobile users |
| US5218716A (en)* | 1990-11-05 | 1993-06-08 | Motorola, Inc. | Method for locating a communication unit within a multi mode communication system |
| US5222249A (en)* | 1990-11-08 | 1993-06-22 | Motorola, Inc. | Dynamic rf communication resource access by roving mobile units |
| US5223844A (en)* | 1992-04-17 | 1993-06-29 | Auto-Trac, Inc. | Vehicle tracking and security system |
| US5227802A (en)* | 1991-12-23 | 1993-07-13 | Motorola, Inc. | Satellite system cell management |
| US5260968A (en)* | 1992-06-23 | 1993-11-09 | The Regents Of The University Of California | Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering |
| US5278892A (en)* | 1991-07-09 | 1994-01-11 | At&T Bell Laboratories | Mobile telephone system call processing arrangement |
| US5309474A (en)* | 1990-06-25 | 1994-05-03 | Qualcomm Incorporated | System and method for generating signal waveforms in a CDMA cellular telephone system |
| US5311197A (en)* | 1993-02-01 | 1994-05-10 | Trimble Navigation Limited | Event-activated reporting of vehicle location |
| US5315636A (en)* | 1991-06-28 | 1994-05-24 | Network Access Corporation | Personal telecommunications system |
| US5317323A (en)* | 1993-03-05 | 1994-05-31 | E-Systems, Inc. | Passive high accuracy geolocation system and method |
| US5319374A (en)* | 1993-02-02 | 1994-06-07 | Trimble Navigation Limited | Precise universal time for vehicles |
| US5321514A (en)* | 1986-05-14 | 1994-06-14 | Radio Telecom & Technology, Inc. | Interactive television and data transmission system |
| US5327144A (en)* | 1993-05-07 | 1994-07-05 | Associated Rt, Inc. | Cellular telephone location system |
| US5334974A (en)* | 1992-02-06 | 1994-08-02 | Simms James R | Personal security system |
| US5343393A (en)* | 1990-06-04 | 1994-08-30 | Nippondenso Co., Ltd. | Steering angle detecting apparatus for motor vehicles based on the phase difference between a steering angle detection signal and steering angle estimated signal |
| US5343512A (en)* | 1992-03-27 | 1994-08-30 | Motorola, Inc. | Call setup method for use with a network having mobile end users |
| US5361399A (en)* | 1992-06-02 | 1994-11-01 | Pagemart, Inc. | Adaptive communication system for transmitting between base stations and portable transceivers via different data rate communication links |
| US5365451A (en)* | 1991-12-09 | 1994-11-15 | Motorola, Inc. | Mobile unit tracking system |
| US5365450A (en)* | 1992-12-17 | 1994-11-15 | Stanford Telecommunications, Inc. | Hybrid GPS/data line unit for rapid, precise, and robust position determination |
| US5365516A (en)* | 1991-08-16 | 1994-11-15 | Pinpoint Communications, Inc. | Communication system and method for determining the location of a transponder unit |
| US5375140A (en)* | 1992-11-24 | 1994-12-20 | Stanford Telecommunications, Inc. | Wireless direct sequence spread spectrum digital cellular telephone system |
| US5382958A (en)* | 1992-12-17 | 1995-01-17 | Motorola, Inc. | Time transfer position location method and apparatus |
| US5390339A (en)* | 1991-10-23 | 1995-02-14 | Motorola Inc. | Method and apparatus for selecting a serving transceiver |
| US5390124A (en)* | 1992-12-01 | 1995-02-14 | Caterpillar Inc. | Method and apparatus for improving the accuracy of position estimates in a satellite based navigation system |
| US5390125A (en)* | 1990-02-05 | 1995-02-14 | Caterpillar Inc. | Vehicle position determination system and method |
| US5392287A (en)* | 1992-03-05 | 1995-02-21 | Qualcomm Incorporated | Apparatus and method for reducing power consumption in a mobile communications receiver |
| US5396540A (en)* | 1992-07-23 | 1995-03-07 | Rockwell International Corporation | Remote vehicle communications system and method |
| US5410728A (en)* | 1988-10-28 | 1995-04-25 | Motorola, Inc. | Satellite cellular telephone and data communication system |
| US5418537A (en)* | 1992-11-18 | 1995-05-23 | Trimble Navigation, Ltd. | Location of missing vehicles |
| US5430656A (en)* | 1992-09-08 | 1995-07-04 | Dekel; Itzhak | Mobile communications system |
| US5452211A (en)* | 1992-08-10 | 1995-09-19 | Caterpillar Inc. | Method and system for determining vehicle position |
| US5546445A (en)* | 1991-12-26 | 1996-08-13 | Dennison; Everett | Cellular telephone system that uses position of a mobile unit to make call management decisions |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243854A (en)* | 1988-08-04 | 1990-02-14 | Toshiba Corp | Radio telephone set |
- 1991
- 1991-12-26USUS07/813,494patent/US5235633A/ennot_activeCeased
- 1992
- 1992-12-23AUAU34141/93Apatent/AU3414193A/ennot_activeAbandoned
- 1992-12-23WOPCT/US1992/010887patent/WO1993013618A1/enactiveApplication Filing
- 1995
- 1995-11-09USUS08/552,486patent/USRE35916E/ennot_activeExpired - Lifetime
Patent Citations (69)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR398773A (en)* | 1908-04-06 | 1909-06-14 | Eunice Packer | Device for tracing on fabrics, etc. |
| GB292182A (en)* | 1926-12-15 | 1928-06-15 | Aldenham Press Ltd | Improvements in or relating to paper folding apparatus |
| US4144411A (en)* | 1976-09-22 | 1979-03-13 | Bell Telephone Laboratories, Incorporated | Cellular radiotelephone system structured for flexible use of different cell sizes |
| US4161734A (en)* | 1977-10-17 | 1979-07-17 | General Electric Company | Position surveillance using one active ranging satellite and time of arrival of a signal from an independent satellite |
| US4177466A (en)* | 1977-11-16 | 1979-12-04 | Lo-Jack Corporation | Auto theft detection system |
| US4233473A (en)* | 1978-08-31 | 1980-11-11 | Frost Edward G | Comprehensive automatic mobile radio telephone system |
| US4232317A (en)* | 1978-11-01 | 1980-11-04 | Freeny Jr Charles C | Quantized hyperbolic and inverse hyperbolic object location system |
| US4229620A (en)* | 1978-11-09 | 1980-10-21 | Bell Telephone Laboratories, Incorporated | Mobile radiotelephone station two-way ranging system |
| US4700374A (en)* | 1984-07-06 | 1987-10-13 | Alcatel N.V. | Mobile telephone location system |
| EP0199266A1 (en)* | 1985-04-17 | 1986-10-29 | Siemens Aktiengesellschaft | Mobile radio system |
| US4788711A (en)* | 1985-11-25 | 1988-11-29 | Cellular Communications Corporation | Apparatus and method for a cellular freeway emergency telephone service |
| US4818998A (en)* | 1986-03-31 | 1989-04-04 | Lo-Jack Corporation | Method of and system and apparatus for locating and/or tracking stolen or missing vehicles and the like |
| US4908629A (en)* | 1986-03-31 | 1990-03-13 | Lo-Jack Corporation | Apparatus for locating and/or tracking stolen or missing vehicles and the like |
| US5321514A (en)* | 1986-05-14 | 1994-06-14 | Radio Telecom & Technology, Inc. | Interactive television and data transmission system |
| US4812852A (en)* | 1987-02-20 | 1989-03-14 | Scientific Development Corporation | Locating system and method |
| US4799062A (en)* | 1987-04-27 | 1989-01-17 | Axonn Corporation | Radio position determination method and apparatus |
| US4888593A (en)* | 1987-12-15 | 1989-12-19 | Signal Science, Inc. | Time difference of arrival geolocation method, etc. |
| US5086452A (en)* | 1988-06-13 | 1992-02-04 | Kabushiki Kaisha Toshiba | Radio telephone system and its control method |
| US4977399A (en)* | 1988-08-09 | 1990-12-11 | At&E Corporation | Mobile radio paging test system |
| US4914651A (en)* | 1988-09-20 | 1990-04-03 | Cellular Data, Inc. | Cellular data system |
| US5410728A (en)* | 1988-10-28 | 1995-04-25 | Motorola, Inc. | Satellite cellular telephone and data communication system |
| JPH02210923A (en)* | 1989-02-09 | 1990-08-22 | Sharp Corp | Travelling object communication system |
| US4972456A (en)* | 1989-02-10 | 1990-11-20 | Gte Mobilnet Incorporated | Rural radiotelephone system |
| US5081667A (en)* | 1989-05-01 | 1992-01-14 | Clifford Electronics, Inc. | System for integrating a cellular telephone with a vehicle security system |
| US4939522A (en)* | 1989-05-15 | 1990-07-03 | Bechtel Group, Inc. | Method and system for monitoring vehicle location |
| US5187805A (en)* | 1989-10-02 | 1993-02-16 | Motorola, Inc. | Telemetry, tracking and control for satellite cellular communication systems |
| US5056109A (en)* | 1989-11-07 | 1991-10-08 | Qualcomm, Inc. | Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system |
| US5214789A (en)* | 1989-11-17 | 1993-05-25 | Uniden America Corporation | Radio channel allocation based on location of mobile users |
| US5054110A (en)* | 1989-12-29 | 1991-10-01 | Motorola, Inc. | Multi-site dispatching system cell registration |
| US5390125A (en)* | 1990-02-05 | 1995-02-14 | Caterpillar Inc. | Vehicle position determination system and method |
| US5093925A (en)* | 1990-04-25 | 1992-03-03 | Motorola, Inc. | Three dimensional cellular communication system with coordinate offset and frequency reuse |
| US5343393A (en)* | 1990-06-04 | 1994-08-30 | Nippondenso Co., Ltd. | Steering angle detecting apparatus for motor vehicles based on the phase difference between a steering angle detection signal and steering angle estimated signal |
| US5309474A (en)* | 1990-06-25 | 1994-05-03 | Qualcomm Incorporated | System and method for generating signal waveforms in a CDMA cellular telephone system |
| US5081703A (en)* | 1990-06-27 | 1992-01-14 | Pactel Corporation | Satellite mobile communication system for rural service areas |
| WO1992002105A1 (en)* | 1990-07-25 | 1992-02-06 | British Telecommunications Public Limited Company | Location determination and handover in mobile radio systems |
| US5043736A (en)* | 1990-07-27 | 1991-08-27 | Cae-Link Corporation | Cellular position locating system |
| US5043736B1 (en)* | 1990-07-27 | 1994-09-06 | Cae Link Corp | Cellular position location system |
| US5170490A (en)* | 1990-09-28 | 1992-12-08 | Motorola, Inc. | Radio functions due to voice compression |
| US5218716A (en)* | 1990-11-05 | 1993-06-08 | Motorola, Inc. | Method for locating a communication unit within a multi mode communication system |
| US5222249A (en)* | 1990-11-08 | 1993-06-22 | Motorola, Inc. | Dynamic rf communication resource access by roving mobile units |
| US5155689A (en)* | 1991-01-17 | 1992-10-13 | By-Word Technologies, Inc. | Vehicle locating and communicating method and apparatus |
| US5398190A (en)* | 1991-01-17 | 1995-03-14 | Hm Holding Corporation | Vehicle locating and communicating method and apparatus |
| US5299132A (en)* | 1991-01-17 | 1994-03-29 | By-Word Technologies, Inc. | Vehicle locating and communicating method and apparatus using cellular telephone network |
| US5315636A (en)* | 1991-06-28 | 1994-05-24 | Network Access Corporation | Personal telecommunications system |
| US5278892A (en)* | 1991-07-09 | 1994-01-11 | At&T Bell Laboratories | Mobile telephone system call processing arrangement |
| US5365516A (en)* | 1991-08-16 | 1994-11-15 | Pinpoint Communications, Inc. | Communication system and method for determining the location of a transponder unit |
| US5390339A (en)* | 1991-10-23 | 1995-02-14 | Motorola Inc. | Method and apparatus for selecting a serving transceiver |
| US5365451A (en)* | 1991-12-09 | 1994-11-15 | Motorola, Inc. | Mobile unit tracking system |
| US5227802A (en)* | 1991-12-23 | 1993-07-13 | Motorola, Inc. | Satellite system cell management |
| US5546445A (en)* | 1991-12-26 | 1996-08-13 | Dennison; Everett | Cellular telephone system that uses position of a mobile unit to make call management decisions |
| US5334974A (en)* | 1992-02-06 | 1994-08-02 | Simms James R | Personal security system |
| US5392287A (en)* | 1992-03-05 | 1995-02-21 | Qualcomm Incorporated | Apparatus and method for reducing power consumption in a mobile communications receiver |
| US5343512A (en)* | 1992-03-27 | 1994-08-30 | Motorola, Inc. | Call setup method for use with a network having mobile end users |
| US5223844B1 (en)* | 1992-04-17 | 2000-01-25 | Auto Trac Inc | Vehicle tracking and security system |
| US5223844A (en)* | 1992-04-17 | 1993-06-29 | Auto-Trac, Inc. | Vehicle tracking and security system |
| US5361399A (en)* | 1992-06-02 | 1994-11-01 | Pagemart, Inc. | Adaptive communication system for transmitting between base stations and portable transceivers via different data rate communication links |
| US5260968A (en)* | 1992-06-23 | 1993-11-09 | The Regents Of The University Of California | Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering |
| US5396540A (en)* | 1992-07-23 | 1995-03-07 | Rockwell International Corporation | Remote vehicle communications system and method |
| US5452211A (en)* | 1992-08-10 | 1995-09-19 | Caterpillar Inc. | Method and system for determining vehicle position |
| US5430656A (en)* | 1992-09-08 | 1995-07-04 | Dekel; Itzhak | Mobile communications system |
| US5418537A (en)* | 1992-11-18 | 1995-05-23 | Trimble Navigation, Ltd. | Location of missing vehicles |
| US5375140A (en)* | 1992-11-24 | 1994-12-20 | Stanford Telecommunications, Inc. | Wireless direct sequence spread spectrum digital cellular telephone system |
| US5390124A (en)* | 1992-12-01 | 1995-02-14 | Caterpillar Inc. | Method and apparatus for improving the accuracy of position estimates in a satellite based navigation system |
| US5382958A (en)* | 1992-12-17 | 1995-01-17 | Motorola, Inc. | Time transfer position location method and apparatus |
| US5365450A (en)* | 1992-12-17 | 1994-11-15 | Stanford Telecommunications, Inc. | Hybrid GPS/data line unit for rapid, precise, and robust position determination |
| US5311197A (en)* | 1993-02-01 | 1994-05-10 | Trimble Navigation Limited | Event-activated reporting of vehicle location |
| US5319374A (en)* | 1993-02-02 | 1994-06-07 | Trimble Navigation Limited | Precise universal time for vehicles |
| US5317323A (en)* | 1993-03-05 | 1994-05-31 | E-Systems, Inc. | Passive high accuracy geolocation system and method |
| US5327144A (en)* | 1993-05-07 | 1994-07-05 | Associated Rt, Inc. | Cellular telephone location system |
Non-Patent Citations (8)
| Title |
|---|
| "Billing Systems: they aren't just for billing anymore," Cellular Business, v9, n12, p. 24, Nov., 1992. |
| "Real Time," Billing World, Jul. Aug. 1995, pp. 39-40. |
| "The Psuedo-Synchronisation, A Costless Feature To Obtain The Gains Of A Synchronised Cellular Network," Nov., 1991, Nice, Valbonne, FR. |
| AT&T 92 TNT 203 29, Oct. 7, 1992, pp. 17 39, Jun., 1995.* |
| AT&T 92 TNT 203-29, Oct. 7, 1992, pp. 17-39, Jun., 1995. |
| Billing Systems: they aren t just for billing anymore, Cellular Business, v9, n12, p. 24, Nov., 1992.* |
| Real Time, Billing World, Jul. Aug. 1995, pp. 39 40.* |
| The Psuedo Synchronisation, A Costless Feature To Obtain The Gains Of A Synchronised Cellular Network, Nov., 1991, Nice, Valbonne, FR.* |
Cited By (129)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE44378E1 (en) | 1994-06-22 | 2013-07-16 | Verizon Laboratories Inc. | Cellular network-based location system |
| USRE38267E1 (en)* | 1994-06-22 | 2003-10-07 | Verizon Laboratories, Inc. | Cellular network-based geographic coverage area reporting method and apparatus |
| US7274332B1 (en) | 1996-09-09 | 2007-09-25 | Tracbeam Llc | Multiple evaluators for evaluation of a purality of conditions |
| US8032153B2 (en) | 1996-09-09 | 2011-10-04 | Tracbeam Llc | Multiple location estimators for wireless location |
| US9134398B2 (en) | 1996-09-09 | 2015-09-15 | Tracbeam Llc | Wireless location using network centric location estimators |
| US7812766B2 (en) | 1996-09-09 | 2010-10-12 | Tracbeam Llc | Locating a mobile station and applications therefor |
| US7903029B2 (en) | 1996-09-09 | 2011-03-08 | Tracbeam Llc | Wireless location routing applications and architecture therefor |
| US9277525B2 (en) | 1996-09-09 | 2016-03-01 | Tracbeam, Llc | Wireless location using location estimators |
| US9060341B2 (en) | 1996-09-09 | 2015-06-16 | Tracbeam, Llc | System and method for hybriding wireless location techniques |
| US7298327B2 (en) | 1996-09-09 | 2007-11-20 | Tracbeam Llc | Geographic location using multiple location estimators |
| US6952181B2 (en) | 1996-09-09 | 2005-10-04 | Tracbeam, Llc | Locating a mobile station using a plurality of wireless networks and applications therefor |
| US7764231B1 (en) | 1996-09-09 | 2010-07-27 | Tracbeam Llc | Wireless location using multiple mobile station location techniques |
| US7525484B2 (en) | 1996-09-09 | 2009-04-28 | Tracbeam Llc | Gateway and hybrid solutions for wireless location |
| US9237543B2 (en) | 1996-09-09 | 2016-01-12 | Tracbeam, Llc | Wireless location using signal fingerprinting and other location estimators |
| US8994591B2 (en) | 1996-09-09 | 2015-03-31 | Tracbeam Llc | Locating a mobile station and applications therefor |
| US6400943B1 (en) | 1997-02-03 | 2002-06-04 | Nortel Networks Limited | Method and apparatus for using advanced positioning systems in cellular communication networks |
| US7151768B2 (en) | 1997-05-19 | 2006-12-19 | Airbiquity, Inc. | In-band signaling for data communications over digital wireless telecommunications networks |
| US6690681B1 (en) | 1997-05-19 | 2004-02-10 | Airbiquity Inc. | In-band signaling for data communications over digital wireless telecommunications network |
| US6493338B1 (en) | 1997-05-19 | 2002-12-10 | Airbiquity Inc. | Multichannel in-band signaling for data communications over digital wireless telecommunications networks |
| US20020093990A1 (en)* | 1997-05-19 | 2002-07-18 | Preston Dan A. | In-band signaling for data communications over digital wireless telecommunications networks |
| US7206305B2 (en) | 1997-05-19 | 2007-04-17 | Airbiquity, Inc. | Software code for improved in-band signaling for data communications over digital wireless telecommunications networks |
| US7747281B2 (en) | 1997-05-19 | 2010-06-29 | Airbiquity Inc. | Method for in-band signaling of data over digital wireless telecommunications networks |
| US20020172193A1 (en)* | 1997-05-19 | 2002-11-21 | Preston Dan A. | In-band signaling for data communications over digital wireless telecommunications networks |
| US6144336A (en) | 1997-05-19 | 2000-11-07 | Integrated Data Communications, Inc. | System and method to communicate time stamped, 3-axis geo-position data within telecommunication networks |
| US20100197322A1 (en)* | 1997-05-19 | 2010-08-05 | Airbiquity Inc | Method for in-band signaling of data over digital wireless telecommunications networks |
| US7317696B2 (en) | 1997-05-19 | 2008-01-08 | Airbiquity Inc. | Method for in-band signaling of data over digital wireless telecommunications networks |
| US7221669B2 (en) | 1997-05-19 | 2007-05-22 | Airbiquity, Inc. | Cellular telephone having improved in-band signaling for data communications over digital wireless telecommunications networks |
| US20020093924A1 (en)* | 1997-05-19 | 2002-07-18 | Integrated Data Communications, Inc. | In-band signaling for data communications over digital wireless telecommunications networks |
| US8559942B2 (en) | 1997-08-04 | 2013-10-15 | Mundi Fomukong | Updating a mobile device's location |
| US8195188B2 (en) | 1997-08-04 | 2012-06-05 | Enovsys Llc | Location reporting satellite paging system with optional blocking of location reporting |
| US8060109B2 (en) | 1997-08-04 | 2011-11-15 | Enovsys Llc | Authorized location reporting mobile communication system |
| US8706078B2 (en) | 1997-08-04 | 2014-04-22 | Enovsys Llc | Location reporting satellite paging system with privacy feature |
| US7714778B2 (en) | 1997-08-20 | 2010-05-11 | Tracbeam Llc | Wireless location gateway and applications therefor |
| US6141548A (en) | 1998-02-02 | 2000-10-31 | Motorola, Inc. | Method and apparatus for location based intercept in a communications system |
| US6154172A (en) | 1998-03-31 | 2000-11-28 | Piccionelli; Gregory A. | System and process for limiting distribution of information on a communication network based on geographic location |
| WO1999051038A3 (en)* | 1998-03-31 | 2000-08-31 | Greg A Piccionelli | Communication network based on geographic location |
| US7792297B1 (en) | 1998-03-31 | 2010-09-07 | Piccionelli Greg A | System and process for limiting distribution of information on a communication network based on geographic location |
| US7286522B2 (en) | 1998-05-19 | 2007-10-23 | Airbiquity, Inc. | Synchronizer for use with improved in-band signaling for data communications over digital wireless telecommunications networks |
| US8068792B2 (en) | 1998-05-19 | 2011-11-29 | Airbiquity Inc. | In-band signaling for data communications over digital wireless telecommunications networks |
| US20060088048A1 (en)* | 1998-10-09 | 2006-04-27 | Microsoft Corporation | Channel access scheme for use in network communications |
| US6618363B1 (en) | 1998-10-09 | 2003-09-09 | Microsoft Corporation | Method for adapting video packet generation and transmission rates to available resources in a communications network |
| US6519004B1 (en) | 1998-10-09 | 2003-02-11 | Microsoft Corporation | Method for transmitting video information over a communication channel |
| US6385454B1 (en)* | 1998-10-09 | 2002-05-07 | Microsoft Corporation | Apparatus and method for management of resources in cellular networks |
| US6507587B1 (en) | 1998-10-09 | 2003-01-14 | Microsoft Corporation | Method of specifying the amount of bandwidth to reserve for use in network communications |
| US7075943B2 (en) | 1998-10-09 | 2006-07-11 | Microsoft Corporation | Channel access scheme for use in network communications |
| US7009994B2 (en) | 1998-10-09 | 2006-03-07 | Microsoft Corporation | Channel access scheme for use in network communications |
| US6445701B1 (en) | 1998-10-09 | 2002-09-03 | Microsoft Corporation | Channel access scheme for use in network communications |
| US6754266B2 (en) | 1998-10-09 | 2004-06-22 | Microsoft Corporation | Method and apparatus for use in transmitting video information over a communication network |
| US6289297B1 (en) | 1998-10-09 | 2001-09-11 | Microsoft Corporation | Method for reconstructing a video frame received from a video source over a communication channel |
| US6438136B1 (en) | 1998-10-09 | 2002-08-20 | Microsoft Corporation | Method for scheduling time slots in a communications network channel to support on-going video transmissions |
| US6490455B1 (en) | 1998-10-20 | 2002-12-03 | Samsung Electronics, Co., Ltd. | Apparatus and method for detecting a mobile phone in idle state |
| US20070213074A1 (en)* | 1998-11-03 | 2007-09-13 | Openwave Systems, Inc. | Interface for wireless location information |
| US6321092B1 (en) | 1998-11-03 | 2001-11-20 | Signal Soft Corporation | Multiple input data management for wireless location-based applications |
| US7522927B2 (en) | 1998-11-03 | 2009-04-21 | Openwave Systems Inc. | Interface for wireless location information |
| US8135413B2 (en) | 1998-11-24 | 2012-03-13 | Tracbeam Llc | Platform and applications for wireless location and other complex services |
| US6529823B1 (en)* | 1999-01-28 | 2003-03-04 | International Business Machines Corporation | Maintaining desired distribution of machines using time multiplexed global positioning system |
| US6591103B1 (en) | 1999-06-30 | 2003-07-08 | International Business Machine Corp. | Wireless telecommunications system and method of operation providing users′ carrier selection in overlapping hetergenous networks |
| US20050020242A1 (en)* | 1999-07-29 | 2005-01-27 | Bryan Holland | Locator system |
| US20080268875A1 (en)* | 1999-07-29 | 2008-10-30 | Bryan Holland | Locator system |
| US8285247B2 (en) | 1999-07-29 | 2012-10-09 | Bryan Holland | Locator system |
| US8543083B2 (en) | 1999-07-29 | 2013-09-24 | Bryan Holland | Locator system |
| US20080220794A1 (en)* | 1999-07-29 | 2008-09-11 | Bryan Holland | Wireless remote location system and method |
| US8238934B2 (en) | 1999-07-29 | 2012-08-07 | Bryan Holland | Wireless remote location system and method |
| US7379729B2 (en) | 1999-07-29 | 2008-05-27 | Bryan Holland | Locator system |
| US9807556B2 (en) | 1999-07-29 | 2017-10-31 | Bryan Holland | Locator system |
| US7349705B1 (en) | 1999-07-29 | 2008-03-25 | Bryan Holland | Wireless remote location system and method |
| US11765545B2 (en) | 1999-09-24 | 2023-09-19 | Dennis Dupray | Network services dependent on geographical constraints |
| US9078101B2 (en) | 1999-09-24 | 2015-07-07 | Dennis Dupray | Geographically constrained network services |
| US9699609B2 (en) | 1999-09-24 | 2017-07-04 | Dennis J. Dupray | Network services dependent upon geographical constraints |
| US8694025B2 (en) | 1999-09-24 | 2014-04-08 | Dennis Dupray | Geographically constrained network services |
| US10455356B2 (en) | 1999-09-24 | 2019-10-22 | Dennis J. Dupray | Network services dependent upon geographical constraints |
| US6393293B1 (en)* | 2000-01-21 | 2002-05-21 | Motorola, Inc. | Method for rectangular parameterization of a geographic area using a geolocation algorithm |
| US6681121B1 (en) | 2000-03-21 | 2004-01-20 | Airbiquity Inc. | Circuitry for activating a modem in a cellular telephone |
| US9924216B2 (en) | 2000-03-21 | 2018-03-20 | Ted R. Rittmaster | System and process for distribution of information on a communication network |
| US10641861B2 (en) | 2000-06-02 | 2020-05-05 | Dennis J. Dupray | Services and applications for a communications network |
| US10684350B2 (en) | 2000-06-02 | 2020-06-16 | Tracbeam Llc | Services and applications for a communications network |
| US11971491B2 (en) | 2000-06-02 | 2024-04-30 | Mobile Maven Llc | Services and applications for a communications network |
| US6714789B1 (en)* | 2000-09-18 | 2004-03-30 | Sprint Spectrum, L.P. | Method and system for inter-frequency handoff and capacity enhancement in a wireless telecommunications network |
| US20020128018A1 (en)* | 2001-03-09 | 2002-09-12 | Bybee Michael F. | Methodology for mobile user terminals in broadband systems |
| WO2002073830A3 (en)* | 2001-03-09 | 2003-03-20 | Hughes Electronics Corp | Method for establishing a connection to a broadband communication platform |
| US7020463B2 (en) | 2001-03-09 | 2006-03-28 | The Directv Group, Inc. | Methodology for mobile user terminals in broadband systems |
| US8082096B2 (en) | 2001-05-22 | 2011-12-20 | Tracbeam Llc | Wireless location routing applications and architecture therefor |
| US11610241B2 (en) | 2001-05-22 | 2023-03-21 | Mobile Maven Llc | Real estate transaction system |
| US9875492B2 (en) | 2001-05-22 | 2018-01-23 | Dennis J. Dupray | Real estate transaction system |
| US20050272443A1 (en)* | 2001-07-11 | 2005-12-08 | Openwave Systems Inc. | Monitoring boundary crossings in a wireless network |
| US20030013449A1 (en)* | 2001-07-11 | 2003-01-16 | Hose David A. | Monitoring boundary crossings in a wireless network |
| US7133685B2 (en) | 2001-07-11 | 2006-11-07 | Openwave Systems Inc. | Monitoring boundary crossings in a wireless network |
| US7092722B1 (en) | 2001-07-26 | 2006-08-15 | Sprint Spectrum L.P. | Method and system for establishing mobile station active set based on mobile station location |
| US7376584B1 (en) | 2001-07-31 | 2008-05-20 | Verizon Corporate Services Group Inc. | Systems and methods for fulfilling orders using location-based abbreviated dialing |
| US20030083080A1 (en)* | 2001-11-01 | 2003-05-01 | Airbiquity Inc. | Facility and method for wireless transmission of data |
| US20070072625A1 (en)* | 2001-11-01 | 2007-03-29 | Airbiquity Inc. | Remote method for wireless transmission of location data |
| US7848763B2 (en) | 2001-11-01 | 2010-12-07 | Airbiquity Inc. | Method for pulling geographic location data from a remote wireless telecommunications mobile unit |
| US7215965B2 (en) | 2001-11-01 | 2007-05-08 | Airbiquity Inc. | Facility and method for wireless transmission of location data in a voice channel of a digital wireless telecommunications network |
| US7509134B2 (en) | 2001-11-01 | 2009-03-24 | Airbiquity Inc. | Remote method for wireless transmission of location data |
| US20040203854A1 (en)* | 2002-04-26 | 2004-10-14 | Nowak Steven P. | Formatting location information based on output device specifications |
| US7366492B1 (en) | 2002-05-03 | 2008-04-29 | Verizon Corporate Services Group Inc. | Method and system for mobile location detection using handoff information |
| US7944350B2 (en) | 2003-08-01 | 2011-05-17 | Spectrum Tracking Systems, Inc. | Method and system for providing tracking services to locate an asset |
| US20100225472A1 (en)* | 2003-08-01 | 2010-09-09 | Culpepper Jerry W | Method and system for providing tracking services to locate an asset |
| US8049617B2 (en) | 2003-08-01 | 2011-11-01 | Spectrum Tracking Systems, Inc. | Method and system for providing tracking services to locate an asset |
| US20050144620A1 (en)* | 2003-12-25 | 2005-06-30 | Fanuc Ltd | Software download system for controller |
| US7260399B1 (en) | 2004-08-30 | 2007-08-21 | Sprint Spectrum L.P. | Method and system for asymmetric handoff of wireless communication sessions |
| US7733853B2 (en) | 2005-01-31 | 2010-06-08 | Airbiquity, Inc. | Voice channel control of wireless packet data communications |
| US8036201B2 (en) | 2005-01-31 | 2011-10-11 | Airbiquity, Inc. | Voice channel control of wireless packet data communications |
| US8014942B2 (en) | 2005-06-15 | 2011-09-06 | Airbiquity, Inc. | Remote destination programming for vehicle navigation |
| US20080195306A1 (en)* | 2005-06-15 | 2008-08-14 | Airbiquity Inc. | Remote destination programming for vehicle navigation |
| US7924934B2 (en) | 2006-04-07 | 2011-04-12 | Airbiquity, Inc. | Time diversity voice channel data communications |
| US20090073032A1 (en)* | 2007-06-12 | 2009-03-19 | Smc Electronics, Ltd. | Apparatus, system and method for global positioning, monitoring, and communication |
| US8195204B1 (en) | 2007-07-25 | 2012-06-05 | Sprint Spectrum L.P. | Method and apparatus for scanning sectors in order of distance from mobile station |
| US9572074B2 (en) | 2007-07-25 | 2017-02-14 | Sprint Spectrum L.P. | Method and apparatus for scanning sectors in order of distance from mobile station |
| US7881263B1 (en) | 2007-07-31 | 2011-02-01 | Sprint Spectrum L.P. | Method for use of azimuth and bearing data to select a serving sector for a mobile station |
| US8369393B2 (en) | 2007-10-20 | 2013-02-05 | Airbiquity Inc. | Wireless in-band signaling with in-vehicle systems |
| US7979095B2 (en) | 2007-10-20 | 2011-07-12 | Airbiquity, Inc. | Wireless in-band signaling with in-vehicle systems |
| US8258942B1 (en) | 2008-01-24 | 2012-09-04 | Cellular Tracking Technologies, LLC | Lightweight portable tracking device |
| US8594138B2 (en) | 2008-09-15 | 2013-11-26 | Airbiquity Inc. | Methods for in-band signaling through enhanced variable-rate codecs |
| US7983310B2 (en) | 2008-09-15 | 2011-07-19 | Airbiquity Inc. | Methods for in-band signaling through enhanced variable-rate codecs |
| US20100273470A1 (en)* | 2009-04-27 | 2010-10-28 | Airbiquity Inc. | Automatic gain control in a personal navigation device |
| US8346227B2 (en) | 2009-04-27 | 2013-01-01 | Airbiquity Inc. | Automatic gain control in a navigation device |
| US8036600B2 (en) | 2009-04-27 | 2011-10-11 | Airbiquity, Inc. | Using a bluetooth capable mobile phone to access a remote network |
| US8073440B2 (en) | 2009-04-27 | 2011-12-06 | Airbiquity, Inc. | Automatic gain control in a personal navigation device |
| US8195093B2 (en) | 2009-04-27 | 2012-06-05 | Darrin Garrett | Using a bluetooth capable mobile phone to access a remote network |
| US8452247B2 (en) | 2009-04-27 | 2013-05-28 | Airbiquity Inc. | Automatic gain control |
| US8418039B2 (en) | 2009-08-03 | 2013-04-09 | Airbiquity Inc. | Efficient error correction scheme for data transmission in a wireless in-band signaling system |
| US8249865B2 (en) | 2009-11-23 | 2012-08-21 | Airbiquity Inc. | Adaptive data transmission for a digital in-band modem operating over a voice channel |
| US8478275B1 (en) | 2010-08-05 | 2013-07-02 | Sprint Spectrum L.P. | Conditional assignment of connection identifiers to help avoid communication errors |
| US9538493B2 (en) | 2010-08-23 | 2017-01-03 | Finetrak, Llc | Locating a mobile station and applications therefor |
| US10849089B2 (en) | 2010-08-23 | 2020-11-24 | Finetrak, Llc | Resource allocation according to geolocation of mobile communication units |
| US12156165B2 (en) | 2010-08-23 | 2024-11-26 | Finetrak, Llc | Resource allocation according to geolocation of mobile communication units related applications |
| US8670425B1 (en) | 2011-08-09 | 2014-03-11 | Sprint Spectrum L.P. | Use of past duration of stay as trigger to scan for wireless coverage |
| US8848825B2 (en) | 2011-09-22 | 2014-09-30 | Airbiquity Inc. | Echo cancellation in wireless inband signaling modem |
Also Published As
| Publication number | Publication date |
|---|---|
| US5235633A (en) | 1993-08-10 |
| AU3414193A (en) | 1993-07-28 |
| WO1993013618A1 (en) | 1993-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE35916E (en) | Cellular telephone system that uses position of a mobile unit to make call management decisions | |
| US5946611A (en) | Cellular telephone system that uses position of a mobile unit to make call management decisions | |
| US5815814A (en) | Cellular telephone system that uses position of a mobile unit to make call management decisions | |
| US6847822B1 (en) | Cellular telephone system that uses position of a mobile unit to make call management decisions | |
| EP0655871B1 (en) | Method and apparatus for management of automatically initiated communication | |
| AU738951B2 (en) | Method and apparatus for performing position- and preference-based service selection in a mobile telephone system | |
| US6424840B1 (en) | Method and system for dynamic location-based zone assignment for a wireless communication network | |
| US5946618A (en) | Method and apparatus for performing position-based call processing in a mobile telephone system using multiple location mapping schemes | |
| US6216002B1 (en) | Method for selecting base transceiver stations for gathering data to determine a mobile station's location in a wireless network | |
| US6868270B2 (en) | Dual-mode methods, systems, and terminals providing reduced mobile terminal registrations | |
| US6909902B1 (en) | Radio base station equipment and mobile station equipment determining location of mobile station by associating with another radio base station or mobile station in a mobile communication system | |
| CA2286161C (en) | Determining the location of a subscriber unit in a mobile communication system | |
| US6011973A (en) | Method and apparatus for restricting operation of cellular telephones to well delineated geographical areas | |
| US5918176A (en) | Method and apparatus for controlling link quality in a wireless communication system | |
| KR100310712B1 (en) | Method and apparatus for geographic based control in a communication system | |
| CN1345481B (en) | Position reporting satellite paging system with position reporting selection blocking | |
| WO1994027398A1 (en) | Cellular telephone system that uses position of a mobile unit to make call management decisions | |
| US6654362B1 (en) | Use of location in handoff in wireless communication systems | |
| JPS63299532A (en) | Moving transmitter and receiver and communication system | |
| US6516195B1 (en) | Method and system for optimizing a telecommunications utilizing positioning information in network recording programs | |
| US5809396A (en) | Radio telecommunication network with selectable ring signal coverage | |
| JP2514085B2 (en) | Method for registering mobile radio telephone in networked cellular radio telephone system and method for paging the mobile radio telephone | |
| JP3428850B2 (en) | Wireless communication system | |
| CA2143776C (en) | Communication network with incoming calls directed through moving cells and method for operating same | |
| EP1235451A1 (en) | Optimisation of cellular communications network performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FEPP | Fee payment procedure | Free format text:ENTITY STATUS SET TO SMALL (ORIGINAL EVENT CODE: SMAL); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY | |
| FPAY | Fee payment | Year of fee payment:8 | |
| AS | Assignment | Owner name:SYCORD LIMITED PARTNERSHIP, NEVADA Free format text:ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SYGNET WIRELESS, INC. AND ITS WHOLLY OWNED SUBSIDIARY, SYGNET COMMUNICATIONS, INC.;DENNISON, EVERETT;DUFFY, TIMOTHY J.;AND OTHERS;REEL/FRAME:013887/0859;SIGNING DATES FROM 19980506 TO 19980605 Owner name:SYCORD LIMITED PARTNERSHIP, NEVADA Free format text:ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SYGNET WIRELESS, INC. AND ITS WHOLLY OWNED SUBSIDIARY, SYGNET COMMUNICATIONS, INC.;DENNISON, EVERETT;DUFFY, TIMOTHY J.;AND OTHERS;SIGNING DATES FROM 19980506 TO 19980605;REEL/FRAME:013887/0859 | |
| FEPP | Fee payment procedure | Free format text:PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY | |
| FPAY | Fee payment | Year of fee payment:12 | |
| AS | Assignment | Owner name:EMSAT ADVANCED GEO-LOCATION TECHNOLOGY, LLC, OHIO Free format text:ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SYCORD LIMITED PARTNERSHIP (A/K/A SYCORD LP);REEL/FRAME:019254/0455 Effective date:20070507 | |
| AS | Assignment | Owner name:SYGNET COMMUNICATIONS, INC., OHIO Free format text:ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DENNISON, EVERETT;NASS, EDWIN L.;DUFFY, TIMOTHY J.;AND OTHERS;REEL/FRAME:022520/0350;SIGNING DATES FROM 19911221 TO 19911223 |