Background technology
Along with the development of the communication technology to mobility, broadband direction, the power saving of portable terminal is subjected to extensive concern.A lot of communication standardizations are organized in the consideration that has all added when formulating relevant criterion power saving.Especially, the access network of future mobile communication system all will carry out transfer of data based on the IP technology, and the burst characteristic of IP packet and the transmission channel sharing characteristic between the user makes that the data that arrive subscriber equipment are discontinuous, therefore, (userequipment, energy consumption UE) seems more important how to save subscriber equipment.
Third generation partner program (3RdGeneration Partnership Project, 3GPP) vital tissue as moving communicating field has greatly promoted 3G (Third Generation) Moblie technology (TheThird Generation, standardization progress 3G), formulate a series of Wideband Code Division Multiple Access (WCDMA) that comprise and inserted (Wide Code Division Multiple Access, WCDMA), high speed downlink packet inserts (HighSpeed Downlink Packet Access, HSDPA), (High Speed Uplink Packet Access HSUPA) waits in interior communication system standard in the high speed uplink packet access.In order to tackle the challenge of broadband access technology, and satisfy the demand of growing novel business, 3GPP will have started 3G Long Term Evolution (Long Term Evolution in the end of the year 2004, LTE) standardization effort of technology, wish further to improve spectrum efficiency, improve the performance of Cell Edge User, reduce system delay, the access service of higher rate etc. is provided for the high-speed mobile user.
In mobile communication system, since between subscriber equipment and the base station information alternately based on the supply of both sides' energy, and for such as mobile phone, notebook computer, the most battery-powered portable terminals of PDA(Personal Digital Assistant) and so on, its energy reserve is limited.In addition, because the different UEs asynchronism(-nization) that enters network, their remaining utilisable energy is difference to some extent also.Under identical network condition, the UE that utilisable energy is lower is forced to shutdown in advance with the UE comparatively more abundant than utilisable energy, thereby can not continue to be served by network.And from user's angle, the user that utilisable energy is lower wishes further to save its electric quantity consumption, thereby prolongs its stand-by time, up to the condition that can possess charging.Therefore, be necessary to consider the difference of UE residue utilisable energy, the lower UE of utilisable energy is different from the operation of the UE of energy abundance, thereby improve because the situation of the network service disruption that energy shortage brings.
In order to reduce energy consumption to prolong standby and the service time of UE, adopted discontinuous reception (Discontinuous Reception in the standard of 3GPP, DRX) pattern, by making UE monitor channel and receive downlink business in the special time period of appointing with the base station, can reduce the time of unnecessary monitor channel, reduce the energy consumption of UE.This DRX pattern is adopted by LTE equally, and can be employed under Radio Resource control idle (RRC_IDLE) and Radio Resource control connection (RRC_CONNECTED) state.For example, under the RRC_IDLE state, the user is with monitoring seek channel (PCH, Paging CHannel) at intervals of predetermined cycle.Network is also only in the information of these specific calling time broadcasting at this UE.UE is receiving after the destination points to own paging information, the preparation access network and connecting of waking up.If UE does not receive the destination and points to the paging information of oneself, then enter sleep period to save energy.
By this discontinuous reception, UE can reduce the time of monitor channel, thereby saves energy, prolongs standby and service time.Yet, being in the sleep period at this UE and arriving if point to the paging information of certain UE, network will wait until that the next calling time of this UE can send this paging information to this UE, causes the delay of paging information thus so.Therefore, the length of one's sleep under the discontinuous reception modes and the delay of paging information are interactive two aspects, should compromise between the two.Consider the remaining utilisable energy difference of UE, can be set the long length of one's sleep the lower UE of dump energy.Though this can increase the delay of paging information, therefore UE has saved energy, prolongs standby and the purpose of service time thereby reach.
On the other hand, when UE enters network with before using corresponding service, need register its positional information at a registration area.A trace regions (Tracking Area, TA) in, UE can roam and not need the operation of location registration.The coverage of trace regions is a compromise product between amount of system information and the Location Registration number of times.Trace regions is big more, and UE can move in the larger context and not need to carry out Location Registration, thereby reduces energy consumption; And bigger trace regions is made up of plurality purpose sub-district, like this system need be in these sub-districts all will be to the information of this UE broadcasting such as beep-page message.That is to say that the beep-page message that points to this UE will take the Radio Resource of a plurality of sub-districts.Therefore,, can consider to register, thereby enlarge the tracked scope of this user, reduce the energy consumption of bringing at most owing to the Location Registration number of times, so that prolong standby and service time to a plurality of trace regions for the lower UE of dump energy.
Embodiment
With reference to the accompanying drawings embodiments of the invention are elaborated, having omitted in the description process is unnecessary details and function for the present invention, obscures to prevent that the understanding of the present invention from causing.
In wireless communication system, such as mobile phone, notebook computer, the most battery-powered subscriber equipmenies of PDA(Personal Digital Assistant) and so on, its energy reserve is limited.For the user, when utilisable energy was low, its electric quantity consumption can be further saved in the common hope of user, thereby prolongs its standby and service time.In this case, though cause the delay of paging information arbitrarily, always good than be forced to the interrupt network service because of electric weight is not enough.Therefore, need a kind of standby and service time method that can as far as possible prolong UE, so that the user can find the condition of charging if having time.Made the present invention to achieve these goals.
Fig. 1 is that expression is provided with the UE running parameter according to the embodiment of the invention based on the available power of UE, with the standby that prolongs UE and the allocation plan of the device of service time.According to present embodiment, as shown in Figure 1, at network side (eNB: the base station) dispose subscriber equipment (UE)energy matching unit 11, parameter adjustment and indicatingmember 12, with transmitter/receiver unit 13, and dispose transmitter/receiver unit 14, utilisableenergy detecting unit 15 andparameter adjustment unit 16 in subscriber equipment (UE) side.
In the UE side, utilisableenergy detecting unit 15 is used to detect the utilisable energy of this UE, and the result that will detect sends to the base station by transmitter/receiver unit 14 (can be used as first transmitter/receiver unit).Be noted that utilisableenergy detecting unit 15 can be according to the predetermined space of base station appointment, or select to detect the interval of utilisable energy according to the dump energy grade of self.As an alternative, utilisableenergy detecting unit 15 can prolong its interval of detecting utilisable energy along with the reduction of utilisable energy, so that further reduce energy consumption.Parameter adjustment unit 16 changes UE corresponding work parameter according to the testing result that transmits from transmitter/receiver unit 14, thereby changes the operation of UE.As an example,parameter adjustment unit 16 can shorten active period by prolonging the length of one's sleep of UE, increases paging cycle, increases and measures at interval, and the modes such as times of registration that reduce UE further reduce the energy consumption of UE.Transmitter/receiver unit 14 receives various information by wave point to the base station side emission and/or from base station side.At this, measuring is the interval that alien-frequency district and different radio access technologies sub-district are measured at interval.
In base station side, user's energy matchingunit 11 receives the utilisable energy information from UE, and set up according to base station side, with the corresponding relation of UE utilisable energy information, with this information matches on relevant parameters.Parameter adjustment and indicatingmember 12 are according to the result of user's energy matchingunit 11 couplings, promptly, various parameters with the utilisable energy information matches, adjust utilisable energy corresponding parameters with this UE, and this parameter sent to this UE by transmitter/receiver unit 13 (can be used as second transmitter/receiver unit), and the base station can be supported to carry out parameter configuration or send the information that allows subscriber equipment to report its utilisable energy when needed according to the utilisable energy of subscriber equipment.Transmitter/receiver unit 13 is received various information by wave point to the emission of UE side and/or from the UE side joint.
Fig. 2 show according to the embodiment of the invention by the UE side based on the available power of UE the flow chart of UE running parameter is set.The operation of UE side is described below with reference to Fig. 2.In the UE side, the utilisableenergy detecting unit 15 that comprises among the UE detects this UE current available energy (step S201).If powered to UE by power supply, for example, to such as mobile phone, notebook computer during the subscriber equipment charging of PDA and so on, can suppose that the UE current available energy is for infinitely great.And when with battery when UE powers, the UE current available energy is the dump energy of battery.As an example, the ratio that can account for the battery gross energy with the dump energy of battery is represented the UE current available energy, or represents the UE current available energy with the up duration of battery, and wherein up duration can be represented with stand-by time.
Usually, present portable terminal can show the dump energy of battery on display screen.For example, show that ondisplay screen 1/3rd battery electric quantity can be used in addition.Report the expense that its dump energy is shared in order to reduce UE to the base station, can carry out classification, make UE only report the rank that it is current the energy of UE.
Fig. 3 a shows the example of direct representation utilisable energy, can come classification with the ratio that utilisable energy accounts for gross energy.As an example, utilisable energy can be divided into level Four, the ratio of utilizing utilisable energy to account for battery total capacity is indicated the grade of utilisable energy.For example, when utilisable energy was the total capacity of battery, the ratio of utilisable energy and battery total capacity was 1 o'clock, can represent with two bits " 00 "; When utilisable energy be battery total capacity 3/4 the time, can represent that utilisable energy is 3/4 of a battery total capacity with bit " 01 "; When utilisable energy be batterytotal capacity 1/2 the time, can represent that utilisable energy is 1/2 of a battery total capacity with bit " 10 "; When utilisable energy drop tototal capacity 1/4 the time, represent that with bit " 01 " utilisable energy is 1/4 of a battery total capacity.Be noted that energy cascade of the present invention is not limited to level Four, but can carry out diversity to utilisable energy according to concrete operating position or environment.Correspondingly, can adopt different bits to represent the ratio of utilisable energy and battery total capacity.In addition, the utilisable energy that can also represent user's battery with the available stand-by time of battery, such as battery can with stand-by time greater than one hour be the 1st grade, battery can be the 2nd grade within half an hour and one hour with stand-by time, half an hour with interior be 3rd level, by that analogy.The threshold value of stand-by time of classification of being used for here can be set by network.
Return Fig. 2,, detect as UE and further detect utilisable energy after the rank of utilisable energy and whether changed a utilisable energy grade at step S202.If determine that at step S202 utilisable energy does not change a grade, flow process then rotates back into step S201, and this UE continues to detect its utilisable energy according to predetermined space.If determine that at step S202 utilisable energy has changed a grade, this UE is then with testing result, and just the grade of current available energy sends to base station (step S203) by transmitter/receiver unit 14.Next, at step S204, after UE sent to the base station to new testing result, UE detected whether receive the new parameter configuration corresponding with new testing result from the base station by transmitter/receiver unit 14.At this, corresponding parameters can be new paging cycle, perhaps allows to insert the information (describing in detail in the back) of a plurality of TA.Do not receive new parameter setting from the base station if UE judges at step S204, UE does not change the parameter setting of oneself, and returns step S201 and continue to operate based on original parameter equipment.Receive new parameter setting from the base station if UE judges to have at step S204, so UE at step S205 according to its operation of changing parameter that newly receives.After this continue its utilisable energy of detection to be set according to new parameter.
Send in the step 203 of testing result of current utilisable energy to the base station at UE,, can also represent the variation of UE utilisable energy with 1 bit in order further to reduce the expense of indication testing result, and without the direct representation utilisable energy.Shown in Fig. 3 b, can represent other variation of energy level with 1 bit.The energy that can suppose UE is divided into N rank, and rank is that 1 expression utilisable energy is the total utilisable energy of battery or is powered by power supply.Rank of the every rising of rank is represented an energy decreases part, and rank is that N represents that the energy of UE is about to be exhausted.In this case, can be set to 1 by this bit during rank of the every decline of the utilisable energy of UE.Otherwise if to the UE charging, the utilisable energy of UE can be set to 0 by this bit when constantly increasing, and expression user utilisable energy returns to maximum, and vice versa.That is to say that when the utilisable energy of UE descended a rank, it was the indication information of " 1 " that UE sends bit to the base station, and when the utilisable energy of UE rose a rank, it was the indication information of " 0 " that UE sends bit to the base station.Like this, the base station can be based on the variation indication information of the utilisable energy that receives from UE, according to the rank of the utilisable energy that stores this UE in the base station, the utilisable energy of UE is reduced or increase a rank, judge UE present located utilisable energy rank thus.Equally, so that reduce energy consumption, Cai UE can send the utilisable energy reduction or the indication of rising to the base station when utilisable energy descends or rises a rank.
Fig. 4 shows the flow chart that the UE running parameter is set based on the available power of UE by base station (eNB) according to the embodiment of the invention.As shown in Figure 4, at step S401, the base station receives the information from UE, and detects the information relevant with the utilisable energy of UE of whether receiving at step S402.The information relevant with the utilisable energy of UE can be the utilisable energy rank shown in Fig. 3 a, also can be other variation of utilisable energy level shown in Fig. 3 b.Do not receive the information relevant with the utilisable energy of UE if the base station is judged at step S402, flow process is then returned step S401, continues to receive the information from UE.Receive the information relevant with the utilisable energy of UE if the base station is judged at step S402, flow process then proceeds to step S403, and the running parameter that these UE needs upgrade is determined according to the UE current available energy in the base station.After this, at step S404, the running parameter of UE is adjusted according to definite result of step S403 in the base station, by transmitter/receiver unit 13 new running parameter is sent to this UE.After this, step S401 is returned in this base station, continues to receive user profile.
In above-mentioned steps S403, the determined parameter in base station can comprise paging cycle, measures at interval, perhaps the number of TA registration etc.In order to realize reconfiguring of parameter, base station side need be mated between the rank of the UE utilisable energy that receives and parameter changed factor.Fig. 5 shows the schematic diagram of base station with an example of the utilisable energy of UE and parameter changed factor coupling.The matching relationship of the utilisable energy and the parameter transformation factor is described below with reference to Fig. 5.
For each utilisable energy rank i, one and rank i corresponding parameters changed factor ki are all arranged in base station side.Can be maximum available energy with energy, just the utilisable energy rank be that 1 o'clock parameter changed factor is set to 1.If current updated parameters is the paging cycle to UE, paging cycle that can supposing the system is Tp.Under the situation of the utilisable energy of considering UE, can be that the paging cycle of the UE of i can be set to Tp/ki with the utilisable energy rank.As an example, can set ki=1-i/N (wherein i≤N, N is a natural number).In this case, along with the minimizing of UE utilisable energy, the rank i of utilisable energy will increase thereupon, and parameter changed factor ki=1-i/N then increases gradually.Therefore, the paging cycle Tp/ki of UE will constantly increase.Like this, by further reducing its energy consumption the length of one's sleep that prolongs UE.
Similarly, if updated parameters also can adopt above-mentioned set-up mode for measuring at interval, lower UE disposes long measurement at interval to utilisable energy, reduces the number of times that UE wakes up and measures.Be noted that to the invention is not restricted to the undated parameter that provides in the top example, but can upgrade any parameter of the energy consumption that can reduce UE according to thought of the present invention.
For example, if the number that updated parameters is UE to be registered in TA can be set to i, the number of the TA that expression UE can register by parameter changed factor ki so when coupling.For example, when the utilisable energy of UE is the i level, can register i TA simultaneously.In this case, by in a plurality of TA broadcasting this UE information, avoided UE in roam procedure for the positional information of upgrading oneself often sends log-on message, thereby the minimizing UE energy consumption.For this parameter,, therefore do not need the base station that the parameter after upgrading is reinformed to UE, so can save step S404 among Fig. 4 owing to be to be responsible for registered location information and to determine UE can register the number of TA by the base station.The base station can change the trace regions registration number of described subscriber equipment according to Tp * ki.At this, Tp represents to register the number of TA.
Fig. 6 shows according to the embodiment of the invention for a change paging cycle of UE and the flow chart of the information interaction of carrying out between base station and UE.With the information interaction among the LTE is example, and its other information of current available energy level can be reported by indication UE in the base station in system information (System Information) or trace regions renewal (Tracking Area Update) message.UE receive include other information of the own report of indication utilisable energy level after, when the rank of its utilisable energy changes, report the rank (shown in Fig. 3 a) of its utilisable energy or report utilisable energy other variation of level (shown in Fig. 3 b).These report informations can be included in and issue the base station in the measurement report.The base station is that this UE calculates new running parameter according to the utilisable energy information of oneself and the matching result of parameter changed factor after the information that receives from user's utilisable energy.Be shown in Fig. 6 that UE calculates paging cycle, and the paging cycle of this renewal reshuffled (RCC RECONFIGURATION) message by RRC issue and send UE.Be appreciated that to the invention is not restricted to this, also can calculate other parameter that can reduce energy consumption for UE.
In addition, also can reduce the energy consumption of UE by the number that changes UE registration TA.Fig. 7 illustrates the flow chart of the information interaction of carrying out according to the number of embodiment of the invention UE registration for a change TA between base station and UE.Be example with the information interaction among the LTE still, when UE detected its utilisable energy variation, UE can report its utilisable energy rank to the base station in the TA updating message.UE can adopt the mode shown in Fig. 3 a or the 3b to report the variation of its utilisable energy rank or utilisable energy to the base station.The base station judges that according to the utilisable energy rank of this UE this UE will register with several TA after the utilisable energy information that receives from UE, and this UE is registered to corresponding TA.Be noted that UE also can report the variation of its utilisable energy rank or utilisable energy to the base station when its utilisable energy descends or rises to predetermined threshold value in order to save the energy consumption of UE.The base station judges that according to the utilisable energy rank of this UE this UE will register with several TA, and this UE is registered to corresponding TA.
The present invention is provided with the running parameter of UE by the utilisable energy according to UE, make that the lower UE of utilisable energy can be by prolonging the length of one's sleep, reducing Location Registration and further reduce energy consumption, thereby further prolong the low user's of user, particularly utilisable energy standby and service time.
So far invention has been described in conjunction with the preferred embodiments.It should be appreciated by those skilled in the art that under the situation that does not break away from the spirit and scope of the present invention, can carry out various other change, replacement and interpolations.Therefore, scope of the present invention should not be understood that to be limited to above-mentioned specific embodiment, and should be limited by claims.