CN102281641B

CN102281641B - Method and device for identifying user equipment and method for transmitting and allocating temporary identity

Info

Publication number: CN102281641B
Application number: CN201110255576.9A
Authority: CN
Inventors: 郭小龙; 李明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd; Shanghai Huawei Technologies Co Ltd
Priority date: 2007-07-27
Filing date: 2007-07-27
Publication date: 2015-05-06
Anticipated expiration: 2027-07-27
Also published as: CN102281641A

Abstract

The embodiment of the invention relates to a method and a device for identifying user equipment (UE) in an evolved network, and a mobility management entity (MME). The method comprises the following steps of: receiving a system architecture evolved-temporary mobile subscriber identity (S-TMSI) which is allocated for the UE accessing the evolved network, wherein the S-TMSI comprises a resource pool identity, an MME identity and a temporary identity of the UE; and temporarily identifying the UE in the evolved network by using the S-TMSI. The device comprises a receiving unit and a temporary identification unit. The MME comprises a temporary identity allocation unit. In addition, the invention also provides a method for transmitting and allocating the temporary identity and a method for receiving and transmitting information according to the temporary identity. By setting the resource pool identity on the S-TMSI, the aim of accelerating the updating and the processing of access equipment is fulfilled, the configuration of network resources of operators is simplified, and radio null interface resources are saved at the same time.

Description

Identify the method and apparatus of subscriber equipment and temporary mark transmission and distribution method

Technical field

The present invention relates to the communication technology, particularly relate to interim mobile user identification.

Background technology

Along with the development of network, in 3 gpp, each manufacturer active research long-term evolving network (LTE, LongTerm Evolved)/System Architecture Evolution network (SAE, System Architecture Evolved), its structural representation as shown in Figure 1, comprising:

Mobility Management Entity 11 (MME, Mobility Management Entity) function be preserve the MM Context of UE, as the mark of user, mobility management states, positional information etc., and to Non-Access Stratum (NAS, Non Access Stratum) signaling processes, and is responsible for the safety etc. of NAS signaling.

SAE gateway 12 (SAE GW) comprises gateway 121 (S-GW, Serving Gateway) and grouped data network gateway 122 (P-GW, PDN Gateway).S-GW and P-GW is two logic entities, may reside on same or different physical entities.

This S-GW preserves the user face context of UE, as IP address and the routing iinformation of UE, perform Lawful Interception, packet routing function etc.Interface S11 between S-GW and MME, is responsible for communicating between MME, S-GW, and the mobility management information carrying out UE and session control information etc. are alternately.

MME11 by S1-MME, S-GW by S1-U respectively with evolved universal terrestrial wireless access network E-UTRAN, (Evolved-Universal Terrestrial Radio Access Network) is responsible for the connection in chain of command and user face.Simultaneously MME11 is by S3 interface, and S-GW is connected with 2G/3GSGSN respectively by S4 interface, respectively the mobility chain of command anchor point of responsible UE between 3G and SAE network and user face anchor point function.

This P-GW122 is responsible for the user face anchor point function that UE is linked into Packet Data Network, communicated with external packet data net by SGi reference point, there is the function of Packet routing and forwarding, and be responsible for policy, billing and strengthen function, packet filtering function etc. based on each user.P-GW122 is connected with S-GW121 by S5 interface, transmits carrying foundation/amendment/deletion and waits control information, and packet routing etc.

Policy charging rule function 13 (PCRF, Policy and Charging Rules Function) transmits QoS and charging policy control information etc. by S7 interface to P-GW.

The concept of Temporary Mobile Subscriber Identity TMSI (TemporaryMobile Subscriber Identity) is related in this system evolved network architecture.In existing UMTS system, also relate to TMSI concept.TMSI is called under CS territory, packet TMSI P-TMSI (PacketTMSI) is called under PS territory, its object introduced prevents IMSI International Mobile Subscriber Identity IMSI (International MobileSubscriber Identity) from causing being followed the tracks of by people eating dishes without rice or wine to expose, and reveals the privacy of user.Therefore, after user's attach to network, SGSN or MSC can distribute to UE TMSI or P-TMSI, such as, service universal packet wireless business business GPRS (General Packet Radio Service) support node SGSN (Serving GPRS Supporting Node) distributes P-TMSI to UE, and moving exchanging center MSC (Mobile Switching Centre) is to UE distribution T MSI.This TMSI is unique at the lane place (LA, Location Area) of UE or this P-TMSI at Lu Youqu (RA, Routing Area), and wherein, a LA can have several RA.When user access network, meeting TMSI or P-TMSI is used as the mark of user, when user has downlink page, also carrys out paging UE by TMSI or P-TMSI, if UE finds the paging information of TMSI or P-TMSI comprising oneself on the paging channel, just initiate access.

In addition, the effect of this TMSI/P-TMSI also has when UE accesses new core net node, under the concept not introducing Iu-flex, new node searches by LAI or RAI (LA or RA mark) context that old node obtains UE, due to the existence of Iu-flex, it is inadequate for only searching old node by LAI/RAI, therefore also will by determining old node together in conjunction with TMSI/P-TMSI.Wherein, namely over the iu interface, there is the corresponding relation of multi-to-multi between access network device and equipment of the core network in this Iu-flex, and such as, a RNC connects multiple SGSN, and a SGSN also can access multiple RNC.The plurality of SGSN is a composition resource pool (Pool) just, in a Pool, there are multiple core net node (as SGSN) and all wireless access network (RAN in Pool, Radio Access Network) node (as RNC) is connected, instead of traditional mode access network node can only connect a core net node.

In addition, the TMSI/P-TMSI node that UE can also be found by RAN to register according to the information in TMSI/P-TMSI when Iu-flex.Specific implementation process is:

0 to 10 configurable bit are had to represent network resource identifier (NRI in TMSI/P-TMSI, NetworkResource Identifier), NRI is used for distinguishing different core net nodes in resource pool (Pool), like this, as UE first time access Pool, RAN node is by NAS node selection function (NNSF, NAS node selection Function), a suitable core net node is selected according to principles such as load balancings, move in this Pool, this UE can not change this node all the time, its principle is exactly, core net node distributes TMSI or P-TMSI to UE, wherein carry the NRI representing this core net node, like this, when UE is when accessing, TMSI or P-TMSI is carried in the initial direct-sending message sent to RAN (Initial Direct Transfer), RAN node is according to the NRI received in TMSI/P-TMSI, directly select on the core net node of the original registration that NRI is corresponding, so just achieve the mobile object not changing core net node in Pool.Certainly, after UE moves out Pool, because RAN node can not find corresponding NRI, therefore can reselect new core net node, UE is mobile in new Pool still can not change this node.

Wherein, the composition 32bit altogether of existing TMSI/P-TMSI, comprise: other bit that PS/CS (being generally two), configurable 0 to 10bit is used for NRI (0 represents do not have flex), some positions are used for restarting (restart) mark and some for distinguishing of some bit, wherein, this bit can carry out ecad distribution according to network design situation.

Such as, in a TMSI/P-TMSI, wherein 2bit is used for differentiation is TMSI or P-TMSI; 5bit is used for restart mark, and the main purpose of this mark is the TMSI preventing from node from restarting causing distribution to distribute, and causes TMSI to distribute and repeats; In addition, 7bit is also had to can be used as the mark of each equipment of the core network distribution UE for NRI, remaining 18bit.

For another example, at present, prior art designs the schematic diagram of TMSI/P-TMSI in Pool, as shown in Figure 2, comprises Pool21, Pool22, Pool23, Pool24, Pool25 and Pool26.Wherein, the NRI of Pool21 comprises 16 to 20; The NRI of Pool22 comprises 11 to 15; The NRI of Pool23 comprises 1; The NRI of Pool24 comprises 6 to 10; The NRI of Pool25 comprises 1 to 5; The NRI of Pool26 comprises 11.Its process is: as shown in the figure, if network condition is: Pool21, Pool22, Pool24 and Pool25 have lap, 5 equipments of the core network are had in each Pool, the different NRI of this equipment distinguishes, in non-conterminous Pool, the NRI of repetition can be used, because NAS node selection function and the UE uniqueness at paging domain TMSI can not be affected.Suppose that each equipment of the core network is maximum and can adhere to 100 general-purpose families, and have 1200 general-purpose families in Pool overlapping region, the number of users in other regions is less.

In the network, 20 equipments of the core network enough adhere to 1200 general-purpose families.NRI can be set to 5bit (because 2^5=32, can identify for 32 equipments of the core network), the independent allocation of each equipment be designated 21bit (1,000,000=2^20,200 general-purpose families can be supplied), 2bit is that PS/CS distinguishes use, and remaining 32-5-21-2=4bit is used as restart and uses.

In SAE network, still the design of Flex is had, similar existing method, in a Pool, have multiple CN node (as MME) to be connected with all RAN node (as ENB) in Pool, when a UE initially enters pool, RAN node can select a CN node according to load balancing principle etc., such UE moves or accesses in this pool, is anchored on selected CN node all the time.And owing to there are MME with S-GW two nodes be connected with ENB in SAE network, just there are MME Pool and S-GW Pool two concepts, and in SAE network, also the Overlapping (overlap) of Pool is allowed, in addition, SAE network provision, MME Pool or S-GW Pool comprises the complete band of position (TA, Track area).TA is the concept of LA/RA in similar UMTS network.

Refer to Fig. 3, for MME Pool in prior art is the schematic diagram that in overlapping region, interim subscriber identity distributes, in the figure, suppose UE every sub-distribution TA, UE first time enters MME Pool1, as UE enters ENB1, then from MME Pool 1 (being called for short MP1), select a MME, do not need to change MME to ENB3 in moving process from ENB1 to ENB2, until enter ENB4, because this ENB and source MME does not have interface (this ENB4 only belongs to MP2), then need the MME reselected in MP2.In figure, ENB2 and ENB3 belongs to two MME Pool, namely has interface with all MME in two Pool, so ENB2 and ENB3 is exactly overlap (overlapping) part of MME Pool 1 and 2.The benefit of this Overlapping is, when UE returns ENB3 again from ENB4, because ENB3 and MME Pool2 has connection, therefore do not need to reselect MME, until enter ENB1 just again can select MME, namely overlapping avoids ping-pong (relocation).If just think, ENB3 and MME Pool2 does not have interface, and so UE moves around between ENB3 and ENB4, then will initiate ping-pong.

For TA concept, SAE network allows to distribute to UE many TA, and this is different from UMTS network, and under UTMS network, network can only distribute to UE LA or RA.If UE registers at Pool in upper like this figure, and distribution T A list is TA1 and TA2, then UE moves around between ENB1 and ENB2 does not need initiation have updated yet, and does not need initiation to upgrade when namely UE moves in the TA list distributed.

In the prior art, when in Pool for access user equipment add, amendment or delete core net node NRI in, all need the situation considering other adjacent Pool, NRI is avoided to repeat, if be the user equipment allocation NRI of access, also need the Pool notifying other, prevent from duplicating NRI in adjacent Pool.In addition, in the access network process of mobile subscriber, need traversal all-network resource identification, its complex disposal process, processing speed is slow, and the satisfaction of user is low.

In addition, in existing UMTS, direct-sending message (Initial Direct Transfer) is at the beginning carried in the radio resource control RRC message sent when UE accesses RAN, comprise non-access stratum node in a territory at this Initial Direct Transfer and select (Intra Domain NAS Node Selector) field, wherein can comprise P-TMSI.In addition, in Initial Direct Transfer message, NAS field can also be carried, NAS is the message that UE directly arrives core net, as RAU or Attach Request, in RAU or AttachRequest, also can comprise P-TMSI, therefore P-TMSI exists 2 in Initial Direct Transfer.Like this for radio open, the wasting of resources is more.

Summary of the invention

The embodiment of the present invention provides the method and device that identify subscriber equipment in a kind of evolvement network, by arranging resource pool mark at S-TMSI, with accelerate that access device upgrades with process problem, and simplify the configuration to Internet resources of operator.

Another technical problem that the embodiment of the present invention solves is to provide Mobility Management Entity in a kind of evolvement network, S-TMSI transmits and distribution method and the method for receiving and sending messages according to S-TMSI, to reduce the waste of radio open resource.

For solving the problem, the embodiment of the present invention provides a kind of method identifying subscriber equipment in evolvement network, and described method comprises step:

When subscriber equipment cut-in evolution network, described evolvement network is the Temporary Mobile Subscriber Identity S-TMSI of this user equipment allocation System Architecture Evolution, and described S-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment;

Utilize described S-TMSI to identify subscriber equipment in cut-in evolution network temporarily.

The embodiment of the present invention also provides the device identifying subscriber equipment in a kind of evolvement network, and described device comprises:

Receiving element, for receiving the access request of the Temporary Mobile Subscriber Identity S-TMSI of the user equipment allocation System Architecture Evolution of carrying cut-in evolution network, described S-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment;

Interim recognition unit, identifies subscriber equipment in cut-in evolution network for utilizing described S-TMSI temporarily.

The embodiment of the present invention also provides the Mobility Management Entity in a kind of evolvement network, comprising:

Temporary mark allocation units, when subscriber equipment cut-in evolution network, for the Temporary Mobile Subscriber Identity S-TMSI for this user equipment allocation System Architecture Evolution, described S-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment.

The embodiment of the present invention is a kind of S-TMSI transmission method also, is applicable to subscriber equipment and transmits S-TMSI to core net, comprise step:

When subscriber equipment access network, send the Radio Resource Control request message of carrying initial direct-sending message to wireless access network, this request message comprises S-TMSI and non-access layer information, does not carry S-TMSI in this non-access layer information;

The interface S1 of described wireless access network between Mobility Management Entity sets up signaling when being connected, and by interface S1, described S-TMSI is put into initial user equipment message, and by initial user equipment message, S-TMSI is supplied to core net node.

The embodiment of the present invention reoffers the distribution method of a kind of S-TMSI, comprises step:

Dispensed S-TMSI, wherein, described S-TMSI meets: consistent with the paging group calculated according to IMSI International Mobile Subscriber Identity according to the paging group that described S-TMSI calculates;

When calling user device, the beep-page message carrying S-TMSI is sent to wireless access network, in described beep-page message, does not carry IMSI International Mobile Subscriber Identity;

Described wireless access network calculates the paging group of subscriber equipment according to S-TMSI, and carries out paging to subscriber equipment.

The embodiment of the present invention provides again a kind of method of receiving and sending messages according to S-TMSI, comprises step:

If S-TMSI is unique in Mobility Management Entity, then in attachment flow, new Mobility Management Entity sends identification request message or the context request message of carrying S-TMSI to old Mobility Management Entity, do not carry old area identification in described request message; Or in the position updating process of Mobility Management Entity, new Mobility Management Entity obtains the request message of customer equipment context to old Mobility Management Entity, and described request message comprises S-TMSI, does not carry old station location marker information;

When the Mobility Management Entity receiving this message is not the old Mobility Management Entity of this subscriber equipment, described Mobility Management Entity is resolved to the address of real old Mobility Management Entity according to the S-TMSI in described message.

As shown from the above technical solution, the embodiment of the present invention by arranging different marks in S-TMSI, the i.e. temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment, when subscriber equipment cut-in evolution network, for S-TMSI described in this user equipment allocation, and utilize described S-TMSI to identify subscriber equipment in cut-in evolution network temporarily.The present embodiment, owing to being configured with resource pool mark in S-TMSI, when in subscriber equipment cut-in evolution network, being accelerated renewal and the processing procedure of this subscriber equipment, be also simplify the configuration of operator to Internet resources simultaneously, thus also improve the satisfaction of user.In addition, the embodiment of the present invention only carries S-TMSI in the described message sent, and need not carry old area identification, thus saves radio open resource.

Accompanying drawing explanation

Fig. 1 is prior art medium-term and long-term evolvement network/System Architecture Evolution schematic network structure;

Fig. 2 is the schematic diagram that prior art designs TMSI/P-TMSI in Pool;

Fig. 3 is that in prior art, MME Pool is the interim schematic diagram distributed by mark in overlapping region;

Fig. 4 is the method flow diagram identifying subscriber equipment in the embodiment of the present invention in evolvement network;

Fig. 5 is that the embodiment of the present invention arranges the unique schematic diagram of Pool-id in PLMN;

Fig. 6 is the flow chart that in the embodiment of the present invention, mobile management entity reselects;

Fig. 7 is the flow chart of the first application example that embodiment of the present invention S-TMSI redistributes;

Fig. 8 is the flow chart of the second application example that embodiment of the present invention S-TMSI redistributes;

Fig. 9 is the flow chart of the 3rd application example that embodiment of the present invention S-TMSI redistributes;

Figure 10 is the flow chart of embodiment of the present invention S-TMSI transmission method;

Figure 11 is the flow chart of embodiment of the present invention S-TMSI distribution method;

Figure 12 is the concrete signaling process figure of this S-TMSI distribution method of Figure 11;

The flow chart of the method that Figure 13 embodiment of the present invention is received and sent messages according to S-TMSI;

Figure 14 is the structural representation of the device identifying subscriber equipment in the embodiment of the present invention in evolvement network;

Figure 15 is the structural representation of the Mobility Management Entity in the embodiment of the present invention in evolvement network.

Embodiment

Below in conjunction with drawings and Examples, the present invention is described in detail.

Refer to Fig. 4, for identifying the method flow diagram of subscriber equipment in embodiment of the present invention evolvement network, the method comprises:

Step 401: the Temporary Mobile Subscriber Identity S-TMSI being received as the System Architecture Evolution of the user equipment allocation of cut-in evolution network, this S-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment;

Wherein, subscriber equipment is assigned with new S-TMSI at access procedure, generally exists: UE first time access network, or UE enters new Pool region from other Pool, or under UE launch position renewal process network determines to distribute the situations such as new S-TMSI to UE.

Step 402: utilize this S-TMSI temporarily to identify subscriber equipment in cut-in evolution network.

That is, the embodiment of the present invention is at the Temporary Mobile Subscriber Identity (SAE-TMSI of System Architecture Evolution, System Architecture Evolved-Temporary Mobile Subscriber Identity, following abbreviation S-TMSI) the middle temporary mark (UE temporary id) increasing resource pool mark (Pool-id), Mobility Management Entity mark (MME-id) and subscriber equipment.Wherein, this Pool-id is the id configured in Pool, can at Public Land Mobile Nerwork (PLMN, Public Land MobileNetwork) interior unique, also can repeat in PLMN, but adjacent have Pool-id in the Pool of overlapping part and can not repeat, and the real-time mode of its best is: adjacent and do not have the Pool-id arranged in the Pool of overlapping part also not repeat; This MME-id is the id of MME in Pool, unique in this Pool; This UE temporary id is unique id that each MME can distribute to UE.

Preferably, in the present embodiment, can also increase in this S-TMSI and restart mark (restart-id), namely the field of S-TMSI comprises: Pool-id, MME-id, UE temporary id and restart-id, and the set-up mode of its best adds with this mode order in this S-TMSI byte.Wherein, cause distributing the mark repeated when this restart-id is and prevents MME from restarting, this restart-id can, according to restarting number of times increasing or decreasing, also can be the free numerical value of band.

Preferably, in the present embodiment, can also increase in this S-TMSI: the mark distinguishing communication system types.Such as, distinguish universal mobile telecommunications system UMTS/ grid evolution architecture SAE or the mark for distinguishing other different system, namely the field of S-TMSI comprises: the id of Pool-id, MME-id, UEtemporary id and difference UMTS/SAE, certainly, also can comprise and just distinguish outside UMTS/SAE, the id of other different system.The set-up mode of its best adds with this mode order in this S-TMSI byte.The id of this differentiation UMTS/SAE (or other system), generally when S-TMSI and TMSI/P-TMSI uses the same bit figure place (i.e. 32bit position), the PS/CS position of reusable TMSI/P-TMSI, as 00/01 represents CS; 10 represent SAE, and 11 represent PS etc.

Preferably, in the present embodiment, can also increase in this S-TMSI: the id of restart-id and difference UMTS/SAE (or other system) simultaneously.Namely the field of S-TMSI comprises: the id of Pool-id, MM E-id, UE temporary id, restart-id and difference UMTS/SAE (or other system).The set-up mode of its best adds with this mode order in this S-TMSI byte.

Needs illustrate, the length of the id involved by the embodiment of the present invention, its id can be configured according to real network situation.But the design for this S-TMSI is not limited to above-mentioned disclosed mode, also can comprise other corresponding mode, in this no longer detailed description.

In S-TMSI, increase the id of Pool-id, MME-id, UE temporary id and/or restart-id and/or difference UMTS/SAE (or other system) in the embodiment of the present invention, it uses the advantage of S-TMSI to illustrate to comprise Pool-id, MME-id and UE temporary id at S-TMSI:

Owing to including Pool-id in S-TMSI, it can configuring MME-id voluntarily in Pool, and need not consider the configuring condition of the MME of adjacent Pool.This and prior art are significantly different, in the prior art (than as shown in Figure 2), (this NRI is equivalent to the MME id in the embodiment of the present invention can not to distribute identical Internet resources NRI in 4 adjacent Pool, because the two is in different networks, (NRI is in UMTS system, and MME id is in SAE), therefore title is also different), because, if distribute identical NRI, to cause multiple UE may being had to be assigned to identical TMSI/P-TMSI in overlapping (overlapping) region, cause confusion, cannot paging to suitable UE; That is, in the prior art, as the NRI of interpolation/amendment/deletion core net node configuration, need the situation considering other adjacent Pool, avoid duplicating; After setting the NRI of certain core net node, also need to notify that other Pool prevent from repeating identical NRI.And for the embodiment of the present invention, owing to being configured with Pool-id in Pool, the Pool-id that its adjacent Pool is arranged is different, on this basis, add in Pool inside/amendment/delete MME node, when MME-id is set, voluntarily MME-id can be set in Pool, as long as avoid occurring identical MME-id in this Pool, do not need the situation considering other Pool.Namely the embodiment of the present invention owing to being configured with Pool-id in Pool, can not consider the configuring condition of adjacent Pool in this Pool during configuring MME.

For the embodiment of the present invention, when UE accesses ENB, owing to carrying S-TMSI, and this S-TMSI at least comprises: Pool-id, MME-id and UE temporary id; When this ENB receives S-TMSI, first judging that UE accesses according to Pool-id is wherein that Pool, if there is the configuration of this Pool-id in current Pool, then selects corresponding MME according to MME-id again, and selects this MME for this UE, completes the access of UE.If when not configuring this Pool-id in ENB, directly can carry out reselecting of new MME, and all NRI need not be traveled through.

In addition, for the embodiment of the present invention, the benefit arranging unique Pool-id in full PLMN is:

If in full PLMN, Pool-id arranges and does not repeat, then S-TMSI is unique at PLMN, old MME can be directly found by S-TMSI, this is because, when UE accesses new core network entity, Pool-id and MME-id that new core network entity carries in S-TMSI according to this UE can find former core network entity.And prior art just must can find the core network entity of original subscriber's equipment access by binding site area identification TAI.The implementation procedure of the embodiment of the present invention is simpler than prior art process, saves Internet resources.

When Pool-id is when full PLMN is unique, UE is when access network, just do not need to provide Old TAI to identify, as in the non-access layer informations such as Attach Request (Attach Request) or position updating request (TAU Request) message, do not need to carry Old TAI information.

Certainly, when UE access network, RAN also can add the old LAI/RAI information of UE in initial UE message (Initial UE Message), its objective is and distribute identical TMSI/P-TMSI to distinguish in diverse location district, core net node is allowed uniquely to determine UE by TMSI in conjunction with LAI, therefore, TAI current for UE also can not add in initial UE message by the embodiment of the present invention.

That is, when the resource pool in S-TMSI be identified at Public Land Mobile Nerwork unique time, access new Mobility Management Entity at subscriber equipment, the resource pool mark in the S-TMSI that new Mobility Management Entity carries from this subscriber equipment and Mobility Management Entity mark obtain the address information of former Mobility Management Entity; Or when the resource pool in S-TMSI to be identified in Public Land Mobile Nerwork as time multiple, then to utilize the old location area of this subscriber equipment or this old location area in conjunction with S-TMSI, obtain the address information of former Mobility Management Entity.

Because the S-TMSI in a MME is unique, adhere in (UE attach) process at UE, new MME gets in the identification request (Identification Request) of UE IMSI to old MME need not carry old TAI information.But in flex situation, new MME obtains the address information of old MME (if S-TMSI is unique at full PLMN by old TAI, S-TMSI, then new MME just can obtain the address information of oldMME by S-TMSI), if the old MME address information that new MME obtains not is real oldMME, then this MME can forward Identification Request to real old MME by S-TMSI.And under existing UMTS, why to carry old RAI information, be to uniquely determine UE together with P-TMSI.Because in a SGSN, the P-TMSI that may duplicate, but be unique P-TMSI certainly in a RAI.Namely UE is in attaching process, IMSI mark is asked from new MME to old MME, because new MME to have obtained the address information of old MME according to old TAI and/or S-TMSI, then when this oldMME sends identification request, only need carry S-TMSI parameter and old TAI information need not be carried again, when this old MME be exactly UE originally registered MME time, old MME is according to the IMSI of S-TMSI information retrieval UE and return to new MME by identification response message, if during the MME the receiving identification request old MME that not to be UE real, this message is transmitted to real old MME according to S-TMSI by this MME, old MME retrieves IMSI according to S-TMSI again and feeds back to new MME.And in existing UMTS system, IMSI needs to combine according to S-TMSI and TAI to determine together.

In embodiments of the present invention, S-TMSI can be made to be at least unique in Pool, because band of position concept (TA concept) uses the multiple or multiple band of position to register the mode of (multi-TA registration), if the band of position list (TA list) that UE distributes can be different, then to ensure can not there is repetition S-TMSI in identical TA in the TA list distributed at each UE, therefore, most preferred embodiment of the present invention is that S-TMSI is unique in Pool, in addition, between the Pool having overlap (Overlapping), identical S-TMSI can not be had, otherwise the S-TMSI that may duplicate in overlapping part.But being not limited to this mode, also can be other mode, in this no longer detailed description.

For convenience of explanation, refer to Fig. 5, for the embodiment of the present invention arranges the not unique schematic diagram of Pool-id in PLMN.In the figure, 6 Pool are had in a region, each Pool arranges a Pool-id, and the setting of Pool-id is not unique, namely identical Pool-id can be configured in non-adjacent Pool, namely label be 51 and 55 Pool-id be all set to 1, the Pool-id=2 of label 53 and 56, the Pool-id=3 of label 52, the Pool-id=4 of label 54, reusable PLMN-id in PLMN like this, thus save bit position, but between the Pool having overlapping, the Pool-id of repeated configuration can not be used, in order to prevent the S-TMSI duplicated in overlapping part.Namely be to allow the S-TMSI of repetition to occur in non-conterminous Pool, because therefore the TA list distributing to a UE across Pool, can not there will not be the situation of the S-TMSI having repetition in identical region.Between the adjacent Pool not having overlapping, the Pool-id of repetition can be distributed in principle, but generally not advise that this configures.Because the UE of free time (idle) state enters adjacent Pool from a Pool, TAU process can be initiated, if these two Pool distribute the Pool-id repeated, the ENB that this UE then may be caused to access directly selects the MME of the corresponding MME-id in adjacent Pool, can not trigger new MME and select; MME-id in other words in the S-TMSI of UE at two Pool sometimes, also can not trigger new MME and select.

See also Fig. 3 and Fig. 5, suppose the Pool-id=1 of MME Pool1, the Pool-id=2 of MME Pool2, use this technical scheme of the embodiment of the present invention, enter Pool when UE first time, access ENB1, ENB1 finds that the Pool-id in its S-TMSI does not configure, or be not equal to 1, then directly carry out the selection of new MME, a MME can be selected according to principles such as load balances.When UE moves to ENB2, and when initiating access, ENB2, according to Pool-id and MME-id in S-TMSI, directly chooses on original MME.When UE moves to ENB4, trigger TAU process, ENB4 finds that Pool-id does not configure (ENB4 only configures Pool-id=2), then directly carry out the selection course of new MME.Change MME time, new MME will get the Context of UE to old MME, when the Pool-id of S-TMSI be full PLMN unique time, newMME directly can obtain the address information of old MME according to Pool-id and MME-id in the S-TMSI of UE.When Pool-id is not unique in full PLMN, new MME will obtain the address information of oldMME according to the old TAI of UE.When flex, the address information of oldMME also together to be determined in conjunction with the information in S-TMSI.

In addition, when occurring in network: when the adjacent Pool without Overlapping region configures identical Pool-id, TAU is initiated when a UE moves to the Pool of its adjacent same Pool-id from a Pool, initial direct-sending message arrives RAN (wireless access network, generally refer to ENB) side, Pool-id and MME-id (supposing that this MME-id also exists at new Pool) in the S-TMSI that RAN node is carried according to UE, then can not trigger new MME selection course, because TAU request be sent on the identical MME of Pool-id and MME-id, (in fact this MME is the MME of new Pool, not original MME), also has another situation, adjacent or non-conterminous Pool configures identical Pool-id, as UE detach, original S-TMSI is preserved, when moving to new Pool attach again after UE detach, as new Pool and UE detach, the Pool-id of Pool is identical, and when new Pool also exists the MME-id in the S-TMSI of UE, MME selection course new equally also can not trigger.In this case, the MME of access is not necessarily optimal, preferably can trigger the selection course of new MME.For this reason, the present invention reselects the flow process of MME under also proposing a kind of above-mentioned situation.Idiographic flow is with reference to figure 6.This Fig. 6 triggers the flow chart that mobile management entity reselects in the embodiment of the present invention; In the figure, owing to may there is the situation that Pool-id and MME-id but actual MME identical with Pool-id and MME-id in S-TMSI changes, the present embodiment illustrates for TAU, and the process of concrete reselection procedure is:

Step 601:UE sends initial DT message (Initial DT Message) to ENB, and this message comprises: non-access layer information (NAS Non-Access Stadium) TAU Request, S-TMSI; Also TAI may be comprised in TAURequest;

Step 602: after this ENB receives this initial DT message, ENB, according to Pool-id and MME-id carried in S-TMSI, selects the MME (be such as MME1) identical with Pool-id with MME-id;

Step 603: this ENB sends Initial UE Message to this MME1, carries TAURequest message in this information;

According to TAI information, step 604: after this MME1 receives TAU Request, learns that MME1 is not the original MME (except TAI, also may determine original MME together according to the S-TMSI in NAS when flex) of UE; So MME1 may determine that carrying out new MME selects, triggering following 605 to 607 step.

Step 605: this MME1 feeds back heavy-route order (Reroute Command) to ENB;

Step 606: after this ENB receives heavy-route order, execution reselects, the new MME as selected is MME2;

Step 607: this ENB sends Initial DT Message to MME2.

Certainly, the Attach sent in reality for the embodiment of the present invention or other processes also may occur that, such as, when the MME (such as MME1) selected finds not to be the original MME of UE information such as (learn original MME) the old TAI that can carry according to UE, the MME1 of this selection can trigger the selection of new MME (such as MME2), also can be the selection that ENB directly carries out new MME (such as MME2), and by network access server (NAS, Network Access Server) message is given to new MME2, the MME1 of this selection sends Reroute Command message to RAN, RAN is allowed to carry out the selection of new MME2 and message to be again dealt on new MME2, can also be that the MME1 selected reselects new MME2, NAS message is directly given to new MME2, can also be that the MME1 selected reselects new MME2, and the message notice RAN of new MME2, RAN are initiated access to new MME2 further.Trigger new MME2 and send Reroute Command; Or the prerequisite of selection triggering new MME2 also can be that the load of the MME1 selected exceedes certain thresholding and is not suitable for carrying new UE; Or the MME1 selected finds that this request is the NAS request that the non-delay requirements such as TAU or Attach are high, otherwise new MME2 selection course may not be triggered.

In addition, the embodiment of the present invention can also avoid the phenomenon of reselection procedure to occur by following process, as when UE accesses RAN, except S-TMSI is reported, also old TAI is also offered RAN node, when RAN node finds that this TAI does not belong to this Pool, the selection of new core net node directly can be carried out.Namely the Intra Domain NASNode Selector in the Initial Direct Transfer message sent when UE accesses RAN also comprises TAI.

In addition, the embodiment of the present invention can also carry out each id configuration in S-TMSI according to real network situation.Such as: often economize a Pool when arranging, the capacity of each MME is 100 general-purpose families, often economizes maximum 6 adjacent Pool, often economizes the words of maximum 100,000,000 users.S-TMSI can be set to: UE temporary id is 21bit (every MME maximum confession 200 general-purpose family), Pool-id is that 3bit is (reusable, maximum confession 8 adjacent Pool), 100 MME (100,000,000 users/1,000,000) are needed in each Pool, MME-id needs 7bit (maximum confession 128 MME), (S-TMSI of SAE may expand to suppose to be fixed as 36bit by S-TMSI, suppose that S-TMSI consists of S-TMSI=Pool-id+MME-id+UE temporary id+restart-id), then can be left 5bit for restart.

When network condition is, as Beijing network, maximum 2000 general-purpose families, Beijing, the heap(ed) capacity of every MME is 250 general-purpose families, and often economizing needs unique Pool-id.Then Pool-id is that 6bit is (for 64 Pool, often economize unique one also much of that), UE temporary id is 22bit (can supply 400 general-purpose families), MME in Pool is 8, MME-id is 3bit or 4bit (for convenience of expansion), can be left 36-6-22-4=4bit like this for restart-id.

Above-mentioned example is when being fixing with S-TMSI, and each id can carry out the example of flexible configuration according to network condition.

In addition, the embodiment of the present invention also provides when meeting the predetermined condition of code reassignment, and this evolvement network redistributes S-TMSI for this subscriber equipment.

Referring to Fig. 7, is the flow chart of the first application example that this S-TMSI of the embodiment of the present invention redistributes.

Due to S-TMSI on a large scale in be unique, S-TMSI may can not change in a long time, but for the consideration of privacy, S-TMSI should regularly change, network can carry out S-TMSIreallocation (S-TMSI redistributes), and the predetermined condition of this code reassignment can be that reallocation is by after periodic location update n time, or after changing MME, or trigger after changing n MME.As MME designs a counter (counter), when the every access network of UE or periodically update, counter adds 1, and when arriving thresholding n, S-TMSI redistributes, and sends to UE, and counter resets simultaneously.Its concrete implementation procedure is:

Step 701: when UE accesses MME, namely send position updating request to MME;

Step 702:MME receiving position update request, by the number of times of counter records location updating, when the number of times of counter records reaches certain thresholding, performs step 703

Step 703:MME is the S-TMSI that this user equipment allocation is new, and by counter resets;

Step 704: meanwhile, MME accepts message to this user feedback location updating, carries new S-TMSI in this message.

That is, when the Counter arrival thresholding (such as counter every UE access increases progressively or every UE change MME increases progressively or every UE initiation TAU increases progressively) of MME, then MME distributes new S-TMSI, and sends to UE, and Counter resets afterwards.

Also referring to Fig. 8, is the flow chart of the second application example that this S-TMSI of the embodiment of the present invention redistributes.In addition, network can also according to timer (timer), when timer expires, then carry out redistributing of S-TMSI, when timer expires, if UE is in idle state, the distribution of S-TMSI can be carried out when UE access network next time, or network carries out paging to UE, carry out the reallocation of S-TMSI.Concrete implementation procedure is:

Step 801: by opening timing device Timer after MME distributes S-TMSI to UE, when timer reaches the predetermined time limit; Perform step 802;

Step 802:MME sends Paging to UE, namely carries out paging to UE;

Step 803:UE sends service request information to MME, carries new S-TMSI in this message;

Step 804:MME is that this user distributes new S-TMSI, and to timer reset;

Step 805:MME sends S-TMSI assignment messages (S-TMSI Reallocation) to this UE, and this message comprises new S-TMSI;

Step 806:UE feeds back S-TMSI Reallocation to MME and accepts message.

In fig. 8, by opening timing device Timer after MME distributes S-TMSI to UE, and when Timer is to after date, MME should distribute new S-TMSI to UE and issue UE, that Timer is to after date in upper example, if UE is in Idle state, then MME carries out paging to UE, distributes new S-TMSI after UE access to UE.When UE is in Active state, can directly performs step 805 and 806, the S-TMSI of distribution is sent to UE, need not paging UE.Also can be Timer to after date, distribute new S-TMSI to UE, step similar Fig. 8 during UE access next time, but there is no paging.

Referring to Fig. 9 again, is the flow chart of the 3rd application example that this S-TMSI of the embodiment of the present invention redistributes.Carry out maintenance class like Timer and Counter above by UE side, at Timer or Counter to after date, UE initiatively initiates the flow process of S-TMSI Reallocation, and detailed process comprises:

In fig .9, whether UE self maintained S-TMSI should distribute, and expires as UE arranges Timer, then initiate TAU request, wherein comprise the request that requirement network redistributes S-TMSI.After network receives request, distribute new S-TMSI and send to UE.Concrete implementation procedure is:

Step 901: when the time of subscriber equipment is to after date; Send TAU request to MME, this request comprises request mark (i.e. step 902) that S-TMSI redistributes;

Step 903:MME is that this user distributes new S-TMSI, and accepts message feedback to this subscriber equipment (i.e. step 904) by location updating;

Step 905: this UE sends location updating to MME and completes message.

In addition, about the method for Access Network identification S-TMSI, in existing UMTS, Initial Direct Transfer is carried in the RRC information sent when UE accesses RAN, comprise an Intra Domain NAS Node Selector field at this Initial Direct Transfer, wherein can comprise P-TMSI.In addition, in Initial Direct Transfer message, NAS field can also be carried, NAS is the message that UE directly arrives core net, as RAU or Attach Request, in RAU or Attach Request, also can comprise P-TMSI, therefore P-TMSI exists 2 in Initial Direct Transfer.Like this for radio open, the wasting of resources is more.Two kinds of modes are had to solve this problem at present.

In addition, the embodiment of the present invention also provides a kind of S-TMSI transmission method, and the method is applicable to subscriber equipment and transmits S-TMSI to core net, and its structural representation refers to Figure 10, and the method comprises:

Step 100: when subscriber equipment access network, send the Radio Resource Control request message of carrying initial direct-sending message to wireless access network, this request message comprises S-TMSI and non-access layer information, does not carry S-TMSI in this non-access layer information;

Namely when subscriber equipment access Radio Access Network, the Radio Resource Control request message of carrying initial direct-sending message is sent to wireless access network, comprise within the message and carry S-TMSI and non-access layer information NAS, in this NAS message (as Attach, TAU request etc.) then do not need to carry S-TMSI again.

Step 101: the interface S1 of this wireless access network between Mobility Management Entity sets up signaling when being connected, and by interface S1, this S-TMSI is put into initial user equipment message, and by initial user equipment message, S-TMSI is supplied to core net node.

Namely core net obtains this S-TMSI information by the S-TMSI carried in initial user equipment message, instead of obtain this S-TMSI information by the S-TMSI carried in NAS message, thus save the expense of again carrying S-TMSI in NAS, reduce and eat dishes without rice or wine and the resource overhead of S1 interface.

The present embodiment that is, in SAE system, S-TMSI is included in the RRC part of Initial Direct Transfer, as in Intra Domain NAS Node Selector field, S-TMSI, when connecting S1-MME further and connecting, is put into the message setting up S1-AP by RAN node.Namely Initial NAS message carried respectively at RRC and S1-AP originally, P-TMSI originally is directly supplied to core net node by NAS by UE, and in the present embodiment, this S-TMSI only provides once, do not carry in NAS, only carry in RRC, be supplied to RAN by UE, RAN initially sets up message by S1-AP again and is supplied to core net node.

The embodiment of the present invention reoffers the distribution method of a kind of S-TMSI, and as shown in figure 11, the method comprises the flow chart of the method:

Step 110: the S-TMSI of dispensed, wherein, this S-TMSI meets: consistent with the paging group calculated according to IMSI International Mobile Subscriber Identity according to the paging group that this S-TMSI calculates;

Step 111: when calling user device, is sent to wireless access network by the beep-page message carrying S-TMSI, and does not carry IMSI International Mobile Subscriber Identity in this beep-page message;

Step 112: this wireless access network calculates the paging group of subscriber equipment according to S-TMSI, and carries out paging to subscriber equipment.

That is, the present embodiment requirement MME is that the paging group that the S-TMSI of user equipment allocation makes by certain algorithm to calculate according to S-TMSI is consistent with the paging group calculated according to IMSI, if the two is consistent, then in distributing paging, MME only needs carry S-TMSI and need not carry IMSI to RAN side again, and RAN calculates the paging group of UE according to S-TMSI and carries out paging to UE.

In the method, MME distributes S-TMSI and the paging group calculated according to S-TMSI will be made consistent with the paging group calculated according to IMSI by certain algorithm, like this when using DRX (discontinuous reception) technology, in distributing paging, MME only needs carry S-TMSI and need not carry IMSI to RAN side again, the paging group that RAN calculates according to S-TMSI is consistent with IMSI, therefore RAN will be issued to by IMSI, save radio open resource, and it also avoid IMSI and expose in RAN side.

This calculating paging group specific algorithm does not limit, such as pass through modulo operation, if network needs 12 paging groups, the paging group of each IMSI is calculated, by IMSI as numeral, divided by 12 according to (IMSI mod 12)+1, obtain its remainder (from 0 to 11), remainder is 0 expression paging group 1, and remainder is 1 expression paging group 2, the like.The present embodiment is act simple algorithm, does not limit specific algorithm.On this special algorithm basis, as long as it is consistent with the paging group that IMSI calculates to ensure that the S-TMSI of network generation meets the paging group drawn according to this algorithm.

The present embodiment is concrete as in Figure 12, user equipment (UE) sends to evolution base station ENB initial direct-sending (Initial DT) message that air-link resources controls RRC information, NAS message is carried for attachment request (Attach Request) in this initial direct-sending message, in order to saving resource in this NAS message, S-TMSI information can not be carried, and in RRC information, only carry S-TMSI; After ENB receives this message, carry out the selected of MME according to the S-TMSI in RRC or reselect, then being carried in the initial UE message of S1-AP message of ENB to MME by NAS message and S-TMSI, such MME obtains NAS message and S-TMSI.That is, send initial user equipment message to MME, this message comprises: S-TMSI and attachment request; Also may send identification request to old MME afterwards, this identification request comprises S-TMSI (be somebody's turn to do as front, can carry old TAI), and this old MME responds to new MME feedback indicator, as shown in phantom in Figure 12.For other implementation procedure of attachment, do not repeat them here.

In addition, the embodiment of the present invention also provides a kind of method of receiving and sending messages according to S-TMSI, and the flow chart of the method as shown in figure 13.New Mobility Management Entity sends in identification request or context request to old Mobility Management Entity in the method, need not carry old area identification, specifically comprise:

Step 131: if S-TMSI is unique in Mobility Management Entity, then in attachment flow, new Mobility Management Entity sends identification request message or the context request message of carrying S-TMSI to old Mobility Management Entity, do not carry old area identification in this request message; Or in the position updating process of Mobility Management Entity, new Mobility Management Entity obtains in the request message of customer equipment context to old Mobility Management Entity, and this request message comprises S-TMSI, does not carry old station location marker information;

Step 132: when the Mobility Management Entity receiving this message is not the old Mobility Management Entity of this subscriber equipment, this Mobility Management Entity is resolved to the address of old Mobility Management Entity according to the S-TMSI in this message.

The embodiment of the present invention also provides the device identifying subscriber equipment in a kind of evolvement network, and its structural representation as shown in figure 14.This device comprises: receiving element 141 and interim recognition unit 142.Wherein, this receiving element 141, for being received as the Temporary Mobile Subscriber Identity S-TMSI of the user equipment allocation System Architecture Evolution of cut-in evolution network, this S-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment; This interim recognition unit 142, identifies subscriber equipment in cut-in evolution network for utilizing this S-TMSI temporarily.

Wherein, this interim recognition unit 142 comprises: judgment sub-unit 1421, chooser unit 1422 and reselect subelement 1423 (in figure shown in dotted line).This judgment sub-unit 1421, for judge the access request of this subscriber equipment carry resource pool mark in S-TMSI and Mobility Management Entity identify whether with configure in current resource pool identical, and the judged result being is sent to chooser unit 1422, no judged result is sent and reselects subelement 1423; This chooser unit 1422, the judged result for according to this being is that corresponding Mobility Management Entity selected by this subscriber equipment; This reselects subelement 1423, for according to should otherwise judged result, load balance principle and S-TMSI in resource pool whether to be uniquely identified in Public Land Mobile Nerwork, reselect corresponding Mobility Management Entity.

This device can be integrated in evolution radio access network entity.

The embodiment of the present invention also provides the Mobility Management Entity in a kind of evolvement network, and its structural representation refers to Figure 15, and this device comprises: temporary mark allocation units 151 and/or temporary mark code reassignment unit 152.Wherein these temporary mark allocation units 151, when subscriber equipment cut-in evolution network, for the Temporary Mobile Subscriber Identity S-TMSI for this user equipment allocation System Architecture Evolution, this S-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment.Temporary mark code reassignment unit 152, redistributes S-TMSI for the predetermined condition subscriber equipment for meeting code reassignment.Wherein, this temporary mark code reassignment unit 152 at least comprises one: predetermined threshold code reassignment subelement 1521 and/or timer code reassignment subelement 1522 and/or location updating code reassignment subelement 1523 and/or code reassignment subelement 1524.This predetermined threshold code reassignment subelement 1521, for Mobility Management Entity more New count reaches predetermined threshold time, for S-TMSI redistributed by this subscriber equipment; This timer code reassignment subelement 1522, for distributing the timer opened after S-TMSI at Mobility Management Entity to after date, for S-TMSI redistributed by this subscriber equipment; This location updating code reassignment subelement 1523, the timer arranged for receiving subscriber equipment expires, during the position updating request with S-TMSI of transmission, for S-TMSI redistributed by this subscriber equipment.This code reassignment subelement 1524, for be received in the band of position that subscriber equipment record upgrades or counting in the unit interval reach predetermined threshold time, initiate with the position updating request of S-TMSI or the request of S-TMSI code reassignment, and redistribute S-TMSI for this subscriber equipment.

Preferably, temporary mark allocation units 151 in the present embodiment can be connected with the receiving element 141 in Figure 14, and predetermined threshold code reassignment subelement 1521 in the present embodiment, timer code reassignment subelement 1522, location updating code reassignment subelement 1523 and code reassignment subelement 1524 or can reselect subelement 143 and are connected respectively with the chooser unit 142 in Figure 14.

As can be seen here, the embodiment of the present invention by arranging different marks in S-TMSI, and this S-TMSI, in conjunction with the feature of SAE network, adds Pool-id.Because TA concept adopts the mode of Multi-TA Registration, each UE can distribute multiple TA, for ensureing not occur there is identical S-TMSI in TA, then needs S-TMSI unique in Pool.And the adjacent Pool with Overlapping also should not occur identical S-TMSI, the differentiation therefore carrying out Pool by Pool-id can ensure the registration area uniqueness at UE of S-TMSI.Pool-id can be unique in whole PLMN, such S-TMSI is unique at whole PLMN, such advantage is that new MME can find old MME to obtain UE context by the S-TMSI of UE, and do not needed in conjunction with TAI, therefore UE there is no need to carry TAI.Certainly, Pool-id also can be unique in PLMN, can repeat between the Pool without Overlapping, but arrange between adjacent Pool as far as possible and do not repeat, to prevent from triggering new MME selection; Which can save the bit position of S-TMSI, but new MME needs in conjunction with TAI to find old MME.

This is only the preferred embodiment of the present invention above; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. a method of optional m igration management entity MME in evolvement network, is characterized in that, comprise step:

Evolution base station (ENB) is received as the radio resource control RRC message that user equipment (UE) sends,

When subscriber equipment access evolution radio access network entity, from the resource pool that described evolution radio access network entity is corresponding, according to the resource pool mark in RRC information, Mobility Management Entity mark, select corresponding Mobility Management Entity;

If in the resource pool that described evolution radio access network entity is corresponding, not do not identify with the resource pool in RRC, Mobility Management Entity identify corresponding to Mobility Management Entity, or when described evolution radio access network entity finds that the old location area of described subscriber equipment does not belong to described resource pool, then select new Mobility Management Entity for described subscriber equipment.

2. identify the method for subscriber equipment according to claim 1 in evolvement network, it is characterized in that, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique.

3. identify the method for subscriber equipment according to claim 1 in evolvement network, it is characterized in that, describedly select corresponding Mobility Management Entity to be specially:

If in the resource pool that described evolution radio access network entity is corresponding, have identify with the resource pool in RRC, Mobility Management Entity identify corresponding to Mobility Management Entity; ENB selects the Mobility Management Entity of described correspondence.

4. identify the method for subscriber equipment according to claim 3 in evolvement network, it is characterized in that, during the new Mobility Management Entity of described selection:

New Mobility Management Entity is selected according to load balance and/or network topology and/or location of user equipment principle.

5. identify the method for subscriber equipment according to claim 3 in evolvement network, it is characterized in that, when the resource pool in RRC information be identified at Public Land Mobile Nerwork unique time, do not carry old tracking area identification during described subscriber equipment access.

6. identify the method for subscriber equipment according to claim 3 in evolvement network, it is characterized in that, comprise further after the Mobility Management Entity that described selection is new:

New Mobility Management Entity obtains the address information of the old Mobility Management Entity of described equipment;

According to described address information, obtain the context of described equipment to old Mobility Management Entity.

7. a choice device of optional m igration management entity MME in evolvement network, is characterized in that, comprising:

Receiving element, for receiving the radio resource control RRC message that user equipment (UE) sends,

Chooser unit or reselect subelement, when subscriber equipment access evolution radio access network entity, from the resource pool that described evolution radio access network entity is corresponding, according to the resource pool mark in RRC information, Mobility Management Entity mark, select corresponding Mobility Management Entity;

8. identify the device of subscriber equipment according to claim 7 in evolvement network, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique; .

9. identify the device of subscriber equipment according to claim 7 in evolvement network, it is characterized in that,

The described Mobility Management Entity of correspondence of selecting is specially:

10. identify the device of subscriber equipment according to claim 7 in evolvement network, during the new Mobility Management Entity of described selection:

New Mobility Management Entity is selected according to load balance and/or network topology and/or location of user equipment principle

Identify the method for subscriber equipment in 11. 1 kinds of evolvement networks, it is characterized in that, comprise step:

Mobility Management Entity MME is the Temporary Mobile Subscriber Identity SAE-TMSI of the System Architecture Evolution of the user equipment allocation of cut-in evolution network; Wherein SAE-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment;

When access initiated by described subscriber equipment, Mobility Management Entity utilizes the subscriber equipment in described SAE-TMSI identification evolvement network.

12. methods according to claim 11, is characterized in that, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique; The temporary mark of described subscriber equipment is unique in Mobility Management Entity.

13., according to the method identifying subscriber equipment in evolvement network described in claim 11, is characterized in that, described Mobility Management Entity utilizes the subscriber equipment in described S-TMSI identification evolvement network to comprise further:

According to described address information, obtain the context of described equipment to old Mobility Management Entity

New Mobility Management Entity identifies the subscriber equipment in evolvement network according to SAE-TMSI.

14. methods according to claim 11, it is characterized in that, the method comprises further, when access initiated by this subscriber equipment, evolvement network identifies according to the resource pool that described subscriber equipment carries in SAE-TMSI and Mobility Management Entity is designated this subscriber equipment optional m igration management entity.

15. methods according to claim 14, is characterized in that, the process of described optional m igration management entity is:

When subscriber equipment access evolution radio access network entity, from the resource pool that described evolution radio access network entity is corresponding, according to the resource pool mark in described SAE-TMSI, Mobility Management Entity mark, select corresponding Mobility Management Entity;

If in the resource pool that described evolution radio access network entity is corresponding, not do not identify with the resource pool in described SAE-TMSI, Mobility Management Entity identify corresponding to Mobility Management Entity, or when described evolution radio access network entity finds that the old location area of described subscriber equipment does not belong to described resource pool, then for new Mobility Management Entity selected by subscriber equipment.

16. methods according to claim 15, is characterized in that, during the new Mobility Management Entity of described selection:

Mobility Management Entity in 17. 1 kinds of evolvement networks, is characterized in that, comprising:

Temporary mark allocation units, when subscriber equipment cut-in evolution network, for the Temporary Mobile Subscriber Identity SAE-TMSI for described user equipment allocation System Architecture Evolution, described SAE-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment;

18. devices according to claim 16, is characterized in that, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique; The temporary mark of described subscriber equipment is unique in Mobility Management Entity.

The method of optional m igration management entity MME in 19. 1 kinds of evolvement networks, is characterized in that, comprise step:

Subscriber equipment sends radio resource control RRC message to evolution base station (ENB), and described RRC information comprises resource pool mark, Mobility Management Entity mark;

When described subscriber equipment access evolution radio access network entity, described resource pool mark, Mobility Management Entity mark select corresponding Mobility Management Entity in order to ENB from resource pool corresponding to described evolution radio access network entity;

20. methods according to claim 19, is characterized in that, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique; The temporary mark of described subscriber equipment is unique in Mobility Management Entity.

The device of optional m igration management entity MME in 21. 1 kinds of evolvement networks, is characterized in that, comprising:

Subscriber equipment is used for sending radio resource control RRC message to evolution base station (ENB), and described RRC information comprises resource pool mark, Mobility Management Entity mark;

When described subscriber equipment access evolution radio access network entity, described resource pool mark, Mobility Management Entity mark select corresponding Mobility Management Entity in order to evolution base station (ENB) from resource pool corresponding to described evolution radio access network entity;

22. devices according to claim 21, is characterized in that, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique; The temporary mark of described subscriber equipment is unique in Mobility Management Entity.

The device be identified in 23. 1 kinds of evolvement networks, is characterized in that, comprising:

It is the module of the Temporary Mobile Subscriber Identity SAE-TMSI of the System Architecture Evolution that it distributes for receiving mobility management entity MME;

For described SAE-TMSI being sent to the module of evolution base station (ENB), wherein said SAE-TMSI comprises the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment,

Wherein said SAE-TMIS is used for the interim subscriber equipment identified in evolvement network.

24. devices according to claim 23, is characterized in that, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique; The temporary mark of described subscriber equipment is unique in Mobility Management Entity.

Identify the method for subscriber equipment in 25. 1 kinds of evolvement networks, it is characterized in that, comprise step:

The Temporary Mobile Subscriber Identity SAE-TMSI of the System Architecture Evolution that subscriber equipment receiving mobility management entity MME distributes; Wherein SAE-TMSI comprises: the temporary mark of resource pool mark, Mobility Management Entity mark and subscriber equipment;

When access initiated by subscriber equipment, described SAE-TMIS utilizes the subscriber equipment in described SAE-TMSI identification evolvement network in order to Mobility Management Entity.

26. methods according to claim 23, is characterized in that, described resource pool is identified in Public Land Mobile Nerwork unique; Or repeat in non-overlapping resource pool; Described Mobility Management Entity is identified in this resource pool unique; The temporary mark of described subscriber equipment is unique in Mobility Management Entity.