CN101072421A

Movatterモバイル変換

Info

Publication number: CN101072421A
Application number: CNA2006100118808A
Authority: CN
Inventors: 史宏逵; 喻丹; 郦辉
Original assignee: Siemens Networks Technology Beijing Co Ltd
Current assignee: Siemens Networks Technology Beijing Co Ltd
Priority date: 2006-05-12
Filing date: 2006-05-12
Publication date: 2007-11-14

Abstract

The invention is related to communication network area, concretely, to method and system for allotting position domain in cellular network dynamically. The invention includes following steps: (1) network device collects information of mobile station in real time; (2) based on information of mobile station (MS), the network station works out a sector list of aiming at position domain of the mobile station, and returns the sector list in the position domain to MS; (3) when MS moves to new sector, the method detects whether the new sector is in the sector list of position domain; if yes, then returning back to step (1), and updating the sector list of position domain of MS; if not, then MS sends out request for updating position, and updates the sector list of position domain of MS. Advantages are: MS does not need to send out login request frequently so as to lighten load of network, and to be in favor of communication effect of users.

Description

The method and system of position field dynamic assignment in a kind of cellular network

Technical field

The present invention relates to communication network field, particularly the communication network of cellular topology structure is the method and system of position field dynamic assignment in a kind of cellular network concretely.

Background technology

Travelling carriage in mobile radio network (MS) can move freely in whole network.But the convenient user terminal of this mode still but makes the network operators face huge challenge.In mobile radio telecommunications, main work just is that travelling carriage manages movably, and this management mainly solves travelling carriage location of mobile station when mobile in network, and for the problems such as route data between travelling carriage and the core net (CN).

The positional information of travelling carriage comprises in cellular network, to the information of position field (RA:registration area) location registers and paging in position field (paging).In traditional position update scheme, the scope of position field just has been prescribed at network design phase, and the configuration information of position field also is stored in network.All be the same all users in a position field.A lot of problems have been produced because of fixing configuration information.If mobile node (MN) does not often move, and paging (paging) is still broadcasted to whole position field, the efficient of this system is very low like this.On the contrary, if position field is very little or the user roams between two position fields through being everlasting, the overhead that then relevant registration signal produces can be very heavy.The position domain list is by network operation in the prior art, and network is divided into the position field sub-district that does not much overlap each other.Travelling carriage can often be monitored signal of base station.The broadcasting the inside of base station has position field ID and sub-district ID.The position field ID that hears when subscriber station is current with heard in the past different the time, subscriber station will be initiated new register requirement.

People place hope on future network are configured to higher frequency spectrum.And the radio wave of higher frequency will have lower penetrability and refractiveness, and the area of sub-district will be reduced like this, and above-mentioned mobility problem will be more serious.

The problem of the inefficiency that can be brought by the territory, solution fixed position of expanded ring paging (expanding ring paging) technology part at present.At first the user sub-district of call network perception last time is that the center from coil to coil is outwards expanded with this sub-district then, and this expanded ring paging technique is realized by the delay performance (latency performance) of sacrificing in the paging.

Chinese patent application number is that 02153197.8 " portable terminal dispatching method in a kind of hierarchical cellular system " discloses be no less than two sub-districts a kind of being divided in hierarchical cellular system, speed to portable terminal is measured, if terminal is in high-speed moving state, judge whether that more high-rise sub-district covers, if have portable terminal is switched in the higher level Target cell, be assigned to the more sub-district of low level if translational speed is very low, but this scheme is just microzonation to be divided into different levels when networking, its position field is fixed, still want frequent switching position territory if portable terminal is paced up and down between two position fields, caused offered load very heavy.

Chinese patent 200410057981.X " portable terminal, location management device and location registering method ", disclose and a kind ofly in different sub-districts portable terminal has been carried out process registration in advance among the territory, fixed position, the switching of this method between fixing position field caused a lot of network performance losses too.

Summary of the invention

In order to overcome the above problems, the object of the present invention is to provide one in cellular network the method and system of position field dynamic assignment, the motion state by travelling carriage dynamically updates the position field cell list to realize reducing the offered load of frequent updating position field.

The method of position field dynamic assignment comprises the steps: in a kind of cellular network

Step 1, travelling carriage returns this travelling carriage mobile message in real time to the network equipment;

Step 2, the described network equipment be according to the mobile message of travelling carriage, makes a position field cell list that is directed to this travelling carriage, and described position field cell list is returned to travelling carriage;

Step 3, when described travelling carriage moves to new sub-district, detect this new sub-district whether in the position field cell list, if in the position field cell list then return step 1, and upgrade this location of mobile station territory cell list, if not in the position field cell list, then this travelling carriage sends position updating request, and upgrade this location of mobile station territory cell list.

In the described step 1, described travelling carriage mails to the described network equipment and storage with described new sub-district ID record, and the described network equipment is united the cell history record that this travelling carriage moves through and carried out the calculating of this travelling carriage mobile message.

The described network equipment obtains the mobile message of this travelling carriage by the global positioning system on the travelling carriage.

If when the translational speed of travelling carriage is scheduled to first speed less than one in described step 2, then include only this travelling carriage place sub-district ID in the position field cell list of Zhi Dinging.

When if the translational speed of travelling carriage is more than or equal to predetermined first speed in described step 2, then the position field cell list of Zhi Dinging comprise this travelling carriage place sub-district ID and with the peripheral adjacent sub-district ID in this sub-district.

When if the translational speed of travelling carriage is scheduled to second speed greater than one in described step 2, and obtained the direction of motion information of this travelling carriage, then the position field cell list of Zhi Dinging comprises, this travelling carriage place sub-district ID and the sub-district ID on the described direction of motion of this travelling carriage.

When if the translational speed of travelling carriage is scheduled to third speed greater than one in described step 2, and obtained the direction of motion information of this travelling carriage, then the position field cell list of Zhi Dinging comprises, this travelling carriage place sub-district ID and the sub-district ID on the described direction of motion of this travelling carriage, also comprise with the described direction of motion of this travelling carriage on the adjacent sub-district ID in sub-district.

Described first speed＜=second speed＜=third speed.

If detect this new sub-district in described step 3 not in the position field cell list, then this travelling carriage sends position updating request, and returns step 1, upgrades this location of mobile station territory cell list.

Described travelling carriage mobile message comprises: the translational speed of travelling carriage and/or moving direction and/or change the travelling carriage present position.

The described network equipment is: base station controller or radio network controller or Location Registration server.

The system of position field dynamic assignment comprises in a kind of cellular network,

Travelling carriage sends its information to the network equipment, and sends the position field update request according to the position field cell list;

The network equipment according to the information of described travelling carriage, is formulated and the corresponding position field cell list of described travelling carriage, and is sent to described travelling carriage.

Described travelling carriage also comprises a GPS module, uses this module to obtain the information of described travelling carriage, sends to the described network equipment by described travelling carriage.

The described network equipment also comprises a processing module, is used for according to the translational speed and/or the moving direction of described travelling carriage and/or changes the position field cell list that travelling carriage present position information is formulated this travelling carriage.

Beneficial effect of the present invention is, can generate the position field sub-district dynamically according to the motion state (comprising movement velocity, state or geographical position) of travelling carriage, make travelling carriage not need the frequent register requirement of sending, alleviate offered load, and helped the user's communications effect.

Description of drawings

The initial dynamic position territory schematic diagram that Fig. 1 distributes for the present invention;

The position field schematic diagram that Fig. 2 is distributed in the high-speed motion process on either direction for travelling carriage of the present invention;

Fig. 3 is the distribution locations territory schematic diagram of travelling carriage of the present invention high-speed motion on a fixed-direction;

Fig. 4 is close to the position field schematic diagram that static state distributes down for travelling carriage of the present invention;

Fig. 5 is the inventive method signal flow graph.

Embodiment

Below, carry out following detailed description for the present invention in conjunction with the accompanying drawings.

1. travelling carriage obtains the translational speed of itself (perhaps as preferred embodiment by global positioning system (GPS), obtain speed, can pass through gps system, perhaps can obtain speed and the direction and the residing geographical position of this portable terminal by utilizing mutual information between travelling carriage and the several base station, market for example, highway etc.), perhaps by the auxiliary method of measurement of cellular network, perhaps by this travelling carriage having passed through the quantity of base station in the recent period, perhaps can be a predefined value.

2. when above-mentioned information is upgraded when mobile station login oneself or trigger position, be sent out the equipment in network, for example base station controller or RNC (Radio Network Controller) perhaps have the terminal of disposal ability in the network such as Location Registration server.If by the above-mentioned translational speed information that the subsidiary means in the cellular network are obtained, then translational speed information may be in network, so can omit this step.

3. according to after receiving above-mentioned information, the processor of the described network equipment is carried out a treatment step, lane place management server for example, generally be integrated on base station controller or the radio network controller (RNC) (Radio Network Controller), draw the needed position field of current mobile station, and generate the cell list of this position field, and send this cell list to travelling carriage, wherein, this cell list is not included in position renewal acceptance (Location Update Accept) information of traditional location territory scheme.The ID that has comprised some sub-districts in this cell list, these sub-districts have constituted the dynamic position territory (upgrading acceptance as the position among Fig. 5) of travelling carriage.

4. cell list is stored in the memory of travelling carriage, so that later reference.

5. no matter when travelling carriage moves in the new sub-district, and it writes down the estimation (that is, sub-district ID in Fig. 5 broadcasting) of new sub-district ID to be used for speed/rate.

6. in new sub-district, the sub-district ID that travelling carriage sends this cell base station is contrasting dynamic position territory cell list and is detecting.

If a. new sub-district is not in the cell list in dynamic position territory, travelling carriage executing location immediately upgrades operation, to such an extent as to the network equipment can track this travelling carriage.(for example position updating request between travelling carriage and the base station 3 in the accompanying drawing 5).

B. otherwise do not need the enable position renewal process, in any case can ask network to upgrade the cell list in dynamic position territory equally.If the sub-district of being passed can be notified to network, then can form a better dynamic position territory and send travelling carriage to, because can predict the direction of motion of travelling carriage like this.

Determining of band of position indications in traditional position field scheme (LAI:Location Area Identifier), in the scheme of described dynamic position territory, no longer must follow, because when the border that each travelling carriage is passed through position field is detected, all be based on by the cell list of the position field at travelling carriage place inquired about and undertaken.

The distribution in dynamic position territory can be according to the mobile message of travelling carriage, comprise speed, direction, scrambling is passed sub-district (knowledge of passing the sub-district can help the lane place server to predict possible the moving of mobile radio station better), and/or the landform prompting (comprises the sub-district area, highway, shopping center or the like), and/or from the statistical information of network radio resources (comprise, traffic conditions, cell capacity).

As shown in Figure 1, the initial dynamic position territory schematic diagram that distributes for the present invention.When the sub-district that travelling carriage is arranged in cellular network is in low-speed motion, for example speed is lower than 5 meter per seconds, the judgment value of this speed can change according to the setting of operator, distribute a dynamic position territory by the network equipment to travelling carriage, this dynamic position territory is made up of a plurality of sub-districts, and send a cell list to travelling carriage by the network equipment, sub-district ID in this cell list is travelling carriage place sub-district ID and the sub-district ID that is adjacent, be labeled as the sub-district of " # " in the drawings, like this when travelling carriage can be not frequent when moving out a sub-district to network equipment registration updating information.

The position field schematic diagram that Fig. 2 is distributed in the high-speed motion process on either direction for travelling carriage of the present invention.If travelling carriage is with high-speed motion, for example speed is higher than 10 meter per seconds, and in common block, move on the urban road, the direction that this means travelling carriage may change at any time, then distribute to the wider position field of travelling carriage one scope, as shown in the figure, not only sub-district in one direction, but the sub-district in the certain limit all is defined as the position field of this travelling carriage on every side, this scope is arbitrarily, can be provided with according to the network environment or the geographical position of locality, if local for not blocking up, and rather spacious highway section, and the movement velocity of travelling carriage is very fast, then can distribute several sub-districts of being correlated with around this travelling carriage as position field, be labeled as the sub-district of " # " in the drawings.

Fig. 3 is the distribution locations territory schematic diagram of travelling carriage of the present invention high-speed motion on a fixed-direction.If travelling carriage is on the highway this travelling carriage the very big change of the general unlikely generation of moving direction, the network equipment detects travelling carriage residing position movement velocity and direction, then formulate a position field cell list as shown in the figure and send to travelling carriage, be labeled as the sub-district of " # " in the drawings, in the moving process of travelling carriage, just the problem in frequent switching position of the prior art territory can not take place.

Fig. 4 is close to the position field schematic diagram that static state distributes down for travelling carriage of the present invention.If travelling carriage is in fixed area such as market or cinema, and speed is very low or transfixion then the network equipment formulate one and have only a sub-district at interior position field cell list, be labeled as the sub-district of " # " in the drawings, save Internet resources like this, and also adapted to the demand of travelling carriage.

Fig. 5 is the inventive method signal flow graph.At first travelling carriage (can comprise moving direction in the translational speed that also can send this travelling carriage when base station 1 sends position updating request simultaneously, other parameters such as geographical position), because velocity information is to change constantly, so but energy measurement is inaccurate, and if geographical location information is just relatively accurate, if this moment, travelling carriage sent to base station 1 with its geographical location information, be in the cinema or in the market and this geography information shows this travelling carriage, the translational speed that then can not need this travelling carriage, just can be determining distribute to which type of position field cell list of this travelling carriage, the log-on message of this travelling carriage is accepted in base station 1, and according to the translational speed of travelling carriage (perhaps direction, information such as geographical position) formulate a rational position field cell list, this position field cell list comprises the ID of related cell, comprise base station 1 and base station 2 in this example, but do not comprise base station 3.When travelling carriage moves in the sub-district at 2 places, base station, the ID of this sub-district is broadcasted in base station 2 in the sub-district, after travelling carriage receives this Cell Broadcast CB signal, detect this sub-district ID whether in the position field cell list, as mentioned above, the sub-district ID at 2 places, base station is in this location of mobile station territory cell list in this example, the position updating request that does not then need the trigger position territory, but need to upgrade the position field cell list equally, base station 2 according to travelling carriage storage by way of the sub-district record or the information of GPS, calculate data such as the movement velocity of this travelling carriage and/or direction, and carry out the renewal of this location of mobile station territory cell list according to these data.If travelling carriage does not carry out the renewal of position field cell list in a period of time, ought move to so in the 3 residing sub-districts, base station, check this sub-district whether in the position field cell list, these 3 residing sub-districts, base station are not in cell list in this example.Travelling carriage sends the position field position updating request to base station 3, and comprises information (if still needing dynamic distribution locations territory) such as translational speed.Base station 3 is accepted travelling carriage and is sent the register update request, and formulates a suitable dynamic position territory cell list according to the corresponding informations such as travelling carriage translational speed that together send over and send to travelling carriage.

Beneficial effect of the present invention is, travelling carriage is to base station real-time report motion state, and obtain dynamic position field cell list, this dynamic cell list of storage in travelling carriage, can effectively alleviate travelling carriage and in rapid movement, pass through the sub-district, the offered load in frequent switching position territory when perhaps being in the low-speed motion state, the performance of raising travelling carriage and network.

Above embodiment only is used to illustrate the present invention, but not is used to limit the present invention.

Claims

1. the method for position field dynamic assignment in the cellular network is characterized in that comprising the steps:

2. the method for position field dynamic assignment in a kind of cellular network according to claim 1, it is characterized in that in the described step 1, described travelling carriage mails to the described network equipment and storage with described new sub-district ID record, and the described network equipment is united the cell history record that this travelling carriage moves through and carried out the calculating of this travelling carriage mobile message.

3. the method for position field dynamic assignment is characterized in that in a kind of cellular network according to claim 1, and the described network equipment obtains the mobile message of this travelling carriage by the global positioning system on the travelling carriage.

4. the method for position field dynamic assignment in a kind of cellular network according to claim 1, it is characterized in that, if when the translational speed of travelling carriage is scheduled to first speed less than one in described step 2, then include only this travelling carriage place sub-district ID in the position field cell list of Zhi Dinging.

5. the method for position field dynamic assignment in a kind of cellular network according to claim 1, it is characterized in that, when if the translational speed of travelling carriage is more than or equal to predetermined first speed in described step 2, then the position field cell list of Zhi Dinging comprise this travelling carriage place sub-district ID and with the peripheral adjacent sub-district ID in this sub-district.

6. the method for position field dynamic assignment in a kind of cellular network according to claim 1, it is characterized in that, when if the translational speed of travelling carriage is scheduled to second speed greater than one in described step 2, and obtained the direction of motion information of this travelling carriage, then the position field cell list of Zhi Dinging comprises, this travelling carriage place sub-district ID and the sub-district ID on the described direction of motion of this travelling carriage.

7. the method for position field dynamic assignment in a kind of cellular network according to claim 1, it is characterized in that, when if the translational speed of travelling carriage is scheduled to third speed greater than one in described step 2, and obtained the direction of motion information of this travelling carriage, then the position field cell list of Zhi Dinging comprises, this travelling carriage place sub-district ID and the sub-district ID on the described direction of motion of this travelling carriage, also comprise with the described direction of motion of this travelling carriage on the adjacent sub-district ID in sub-district.

8. according to the method for position field dynamic assignment in claim 4 or 5 or the 6 or 7 described a kind of cellular networks, it is characterized in that, described first speed smaller or equal to second speed smaller or equal to third speed.

9. the method for position field dynamic assignment in a kind of cellular network according to claim 1, it is characterized in that, if in described step 3, detect this new sub-district not in the position field cell list, then this travelling carriage sends position updating request, and return step 1, upgrade this location of mobile station territory cell list.

10. the method for position field dynamic assignment in a kind of cellular network according to claim 1 is characterized in that described travelling carriage mobile message comprises: the translational speed of travelling carriage and/or moving direction and/or change the travelling carriage present position.

11. the method for position field dynamic assignment in a kind of cellular network according to claim 1 is characterized in that the described network equipment is: base station controller or radio network controller or Location Registration server.

12. the system of position field dynamic assignment is characterized in that comprising in the cellular network,

13. the system of position field dynamic assignment in a kind of cellular network according to claim 12, it is characterized in that, described travelling carriage also comprises a GPS module, uses this module to obtain the information of described travelling carriage, sends to the described network equipment by described travelling carriage.

14. the system of position field dynamic assignment in a kind of cellular network according to claim 12, it is characterized in that, the described network equipment also comprises a processing module, is used for according to the translational speed and/or the moving direction of described travelling carriage and/or changes the position field cell list that travelling carriage present position information is formulated this travelling carriage.

15. the system according to position field dynamic assignment in claim 12 or the 13 or 14 described a kind of cellular networks is characterized in that the described network equipment is: base station controller or radio network controller or Location Registration server.