WO2009015595A1 - Method and device for identifying user device and method for transmitting and allocating temporary identity - Google Patents

Method and device for identifying user device and method for transmitting and allocating temporary identity Download PDF

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Publication number
WO2009015595A1
WO2009015595A1 PCT/CN2008/071780 CN2008071780W WO2009015595A1 WO 2009015595 A1 WO2009015595 A1 WO 2009015595A1 CN 2008071780 W CN2008071780 W CN 2008071780W WO 2009015595 A1 WO2009015595 A1 WO 2009015595A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
mobile subscriber
subscriber identity
temporary mobile
sae system
Prior art date
Application number
PCT/CN2008/071780
Other languages
English (en)
French (fr)
Inventor
Xiaolong Guo
Ming Li
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40303899&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009015595(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to ES08783773T priority Critical patent/ES2397964T3/es
Priority to EP21182324.0A priority patent/EP3952372A1/en
Priority to PL19191874T priority patent/PL3637812T3/pl
Priority to EP13164621.8A priority patent/EP2621204B1/en
Priority to EP19191874.7A priority patent/EP3637812B1/en
Priority to EP08783773A priority patent/EP2161963B1/en
Priority to JP2010517260A priority patent/JP5010029B2/ja
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009015595A1 publication Critical patent/WO2009015595A1/zh
Priority to US12/691,137 priority patent/US8238909B2/en
Priority to US13/253,704 priority patent/US8200220B2/en
Priority to US13/540,331 priority patent/US8428590B2/en
Priority to US13/849,299 priority patent/US8903389B2/en
Priority to US14/049,990 priority patent/US9288779B2/en
Priority to US14/050,004 priority patent/US11363442B2/en
Priority to US15/004,134 priority patent/US11363443B2/en
Priority to US17/827,717 priority patent/US11979938B2/en
Priority to US17/827,718 priority patent/US11991777B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/088—Load balancing or load distribution among core entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/34—Network arrangements or protocols for supporting network services or applications involving the movement of software or configuration parameters 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Definitions

  • the present invention relates to communication technologies, and more particularly to a method and apparatus for identifying user equipment and a method of temporary identification transmission and distribution.
  • LTE Long Term Evolved
  • SAE System Architecture Evolved
  • the function of the mobility management entity 11 is to store the mobility management context of the UE, such as the identity of the user, mobility management status, location information, etc., and to the non-access stratum (NAS, Non Access Stratum). Signaling is processed, which is responsible for the security of NAS signaling.
  • MME Mobility Management Entity
  • NAS Non Access Stratum
  • the SAE Gateway includes a Serving Gateway 121 (S-GW, Serving Gateway) and a Packet Data Network Gateway 122 (P-GW, PDN Gateway).
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • the S-GW and the P-GW are two logical entities that can exist on the same or different physical entities.
  • the S-GW saves the user plane context of the UE, such as the IP address and routing information of the UE, and performs lawful interception, packet data routing, and the like.
  • the interface S11 between the S-GW and the MME is responsible for communication between the MME and the S-GW, and performs interaction between the mobility management information of the UE and the session control information.
  • the MME 11 is responsible for the connection between the control plane and the user plane through the S 1 -U and the E-UTRAN (Evolved-Universal Terrestrial Radio Access Network) through the S 1 -MME and the S-GW.
  • the MME11 is connected to the 2G/3G SGSN through the S3 interface, and the S-GW is responsible for the mobility control plane anchor and the user plane anchor function between the 3G and the SAE network.
  • the P-GW 122 is responsible for the user plane anchor function of the UE accessing the packet data network, communicates with the external packet data network through the SGi reference point, has the function of packet routing and forwarding, and is responsible for the policy charging enhancement function, based on each User's packet filtering function, etc.
  • the P-GW 122 is connected to the S-GW 121 through an interface of S5 or S8 (in the case of roaming), and transmits control information such as bearer establishment/modification/deletion, and Group data routing, etc.
  • the Policy and Charging Rules Function provides the QoS and charging policy control information to the P-GW through the S7 interface.
  • TMSI Temporary Mobile Subscriber Identity
  • CS domain the packet temporary mobile subscriber identity
  • P-TMSI Packet TMSI
  • IMSI International Mobile Subscriber Identity
  • the SGSN or MSC allocates to the UE-TMSI or P-TMSI, for example, the GPRS (General Packet Radio Service) SGSN (Serving GPRS Supporting Node) allocates P to the UE.
  • - TMSI Mobile Switching Centre (MSC) assigns TMSI to the UE.
  • the TMSI is unique in the location area (LA, Location Area) of the UE or the P-TMSI in the routing area (RA, Routing Area), where one LA may have several RAs.
  • the TMSI or P-TMSI is used as the identifier of the user.
  • the UE When the user has the downlink paging, the UE is also paged through the TMSI or the P-TMSI. If the UE finds itself on the paging channel, The paging information of the TMSI or P-TMSI initiates the access.
  • the role of the TMSI/P-TMSI is also when the UE accesses the new core network node.
  • the new node searches for the old one through LAI or RAI (LA or RA identification).
  • LAI or RAI LA or RA identification
  • the node is to obtain the context of the UE. Due to the existence of Iu-flex, it is not enough to find the old node only through LAI/RAI. Therefore, the old node is determined together by combining TMSI/P-TMSI.
  • the Iu-flex that is, on the Iu interface, has a many-to-many correspondence between the access network device and the core network device. For example, one RNC connects multiple SGSNs, and one SGSN can also access multiple RNCs.
  • the plurality of SGSNs form a pool of resources.
  • multiple core network nodes such as SGSNs
  • RAN Radio Access Network
  • RNCs Radio Access Network
  • the TMSI/P-TMSI can also find the node registered by the UE according to the information in the TMSI/P-TMSI in the case of Iu-flex.
  • the specific implementation process is:
  • NRI Network Resource Identifier
  • the principle is that the core network node allocates a TMSI or a P-TMSI to the UE, where the NRI is carried on behalf of the core network node, so that when the UE is accessing, Carrying TMSI or P-TMSI in the initial Direct Transfer message sent to the RAN, and the RAN node directly selects the original registered core network node corresponding to the NRI according to the NRI received in the TMSI/P-TMSI.
  • This achieves the purpose of moving within the pool without changing the core network node.
  • the new core network node is reselected, and the UE does not change the node after moving in the new pool.
  • the existing TMSI/P-TMSI has a total of 32 bits, including: several bits for distinguishing PS/CS (generally two bits), configurable 0 to 10 bits for NRI (0 means no flex), several The bit is used to restart the tag and other bits of several bits, where the bit can be adaptively allocated according to the network deployment.
  • restart flag 5 bits are used for the restart flag.
  • the main purpose of this flag is to prevent the node from being restarted and causing the allocated TMSI to be allocated, resulting in duplicate TMSI allocation.
  • NRI 7 bits for NRI, and the remaining 18 bits can be used as the UE for each core network device.
  • the prior art designs a schematic diagram of TMSI/P-TMSI in the Pool, as shown in FIG. 2, including Pool21, Pool22, Pool23, Pool24, Pool25 and Pool26.
  • Pool21's NRI includes 16 to 20; Pool22's NRI includes 11 to 15; Pool23's NRI includes 1; Pool24's NRI includes 6 to 10; Pool25's NRI includes 1 to 5; Pool26's NRI includes 11.
  • the process is as follows: If the network status is: Pool21, Pool22, Pool24 and Pool25 have overlapping parts, there are 5 core network devices in each pool, the devices are distinguished by different NRIs, and are not adjacent.
  • a Reuse NRI can be used because it does not affect the NAS node selection function and the UE's uniqueness in the paging area TMSI.
  • Each core network device can be attached to a maximum of 1 million users, while there are 12 million users in the pool overlap area, and the number of users in other areas is small.
  • FIG. 3 is a schematic diagram of the MME Pool being allocated to the temporary user identity in the overlapping area in the prior art.
  • the UE allocates one TA at a time, and the UE enters the MME Pool1 for the first time. If the UE enters the ENB1, Selecting an MME from MME Pool l (MP1 for short) does not require a more MME from ENB 1 to ENB2 to ENB3 during the move until it enters ENB4 because the ENB4 has no interface with the MME in the source MP1 (the ENB4 belongs only to MP2), you need to re-select the MME in MP2.
  • MP1 Mobility Management Entity
  • ENB2 and ENB3 belong to two MME Pools, that is, they interface with all MMEs in the two pools, so ENB2 and ENB3 are the overlapping parts of MME Pool 1 and 2.
  • the benefit of the Overlapping is that when the UE returns from ENB4 to ENB3, since ENB3 is connected to MME Pool2, there is no need to reselect the MME, and the MME is not selected again until entering ENB1, that is, overlapping avoids the ping-pong effect (ie, ping ping pong relocation) ).
  • ENB3 does not have an interface with MME Pool2, then the UE moves back and forth between ENB3 and ENB4 to initiate a ping-pong effect.
  • the SAE network allows multiple TAs to be allocated to the UE, which is different from the UMTS network.
  • the network can only be assigned to the UE-LA or RA.
  • the UE if the UE is registered in the pool in the above figure, and the TA list is assigned to TA1 and TA2, the UE does not need to initiate an update to move back and forth between ENB1 and ENB2, that is, the UE does not need to initiate an update when moving within the allocated TA list. of.
  • An embodiment of the present invention provides a method and an apparatus for identifying a user equipment in an evolved network, by setting a resource pool identifier in a SAE-TMSI (System Architecture Evolved-Temporary Mobile Subscriber Identity) to speed up the connection.
  • SAE-TMSI System Architecture Evolved-Temporary Mobile Subscriber Identity
  • Another technical problem to be solved by the embodiments of the present invention is to provide a mobility management entity in an evolved network, a temporary mobile subscriber identity delivery and allocation method of the SAE system, and a method for transmitting and receiving information according to the temporary mobile subscriber identity of the SAE system, Reduce the waste of wireless air interface resources.
  • an embodiment of the present invention provides a method for identifying a user equipment in an evolved network, where the method includes the following steps:
  • the evolved network allocates the temporary mobile subscriber identity of the SAE system to the user equipment, and the temporary mobile subscriber identity of the SAE system includes at least: the resource pool identifier, the mobility management entity identifier, and the user equipment.
  • the user equipment in the evolved network is temporarily identified by using the temporary mobile subscriber identity of the SAE system.
  • An embodiment of the present invention further provides an apparatus for identifying a user equipment in an evolved network, where the apparatus includes:
  • the receiving unit is configured to receive, by the user equipment that accesses the evolved network, an access request of the temporary mobile subscriber identity of the SAE system, where the temporary mobile subscriber identity of the SAE system includes at least: a resource pool identifier, a mobility management entity identifier, and a user Temporary identification of the equipment;
  • the temporary identification unit is configured to temporarily identify the user equipment in the evolved network by using the temporary mobile subscriber identity of the SAE system.
  • the embodiment of the present invention further provides a mobility management entity in an evolved network, including:
  • a temporary identifier allocation unit configured to allocate a temporary mobile subscriber identity of the SAE system to the user equipment accessing the evolved network, where the temporary mobile subscriber identity of the SAE system includes at least: a resource pool identifier, a mobility management entity identifier, and a temporary of the user equipment Logo.
  • the embodiment of the present invention further includes a method for transmitting a temporary mobile subscriber identity of the SAE system, which is applicable to the user equipment transmitting the temporary mobile subscriber identity of the SAE system to the core network, including the following steps:
  • the temporary mobile subscriber identity and the non-access stratum message of the SAE system does not carry the temporary mobile subscriber identity of the SAE system;
  • the evolved radio access network entity establishes a signaling connection with the mobility management entity through the interface S1.
  • the temporary mobile subscriber identity of the SAE system is placed in the initial user equipment message through the interface SI, and the temporary mobile subscriber identity of the SAE system is provided to the core network node by using the initial user equipment message.
  • the embodiment of the present invention further provides a method for allocating a temporary mobile user identifier of a SAE system, including the following steps:
  • a paging group calculated according to the temporary mobile subscriber identity of the SAE system and an international mobile subscriber identity (IMSI) The calculated paging group is consistent;
  • the paging message carrying the temporary mobile subscriber identity of the SAE system is sent to the evolved radio access network entity, and the paging message does not carry the international mobile subscriber identity;
  • the evolved radio access network entity calculates a paging group of the user equipment according to the temporary mobile subscriber identity of the SAE system, and pages the user equipment.
  • the embodiment of the invention further provides a method for transmitting and receiving information according to the temporary mobile subscriber identity of the SAE system, including the steps of:
  • the new mobility management entity sends an identity request message or a context request message carrying the temporary mobile subscriber identity of the SAE system to the old mobility management entity.
  • the request message does not carry the old area identifier; or, in the location update process of the mobility management entity, the new mobility management entity acquires a request message of the user equipment context from the old mobility management entity, where the request message includes The temporary mobile subscriber identity of the SAE system does not carry the old location identification information;
  • the mobility management entity that receives the message is not the old mobility management entity of the user equipment, the mobility management entity resolves to the real old mobility management entity according to the temporary mobile user identity of the SAE system in the message. the address of.
  • FIG. 1 is a schematic structural diagram of a long-term evolution network/system architecture evolution network (SAE) in the prior art
  • FIG. 2 is a schematic diagram of designing a TMSI/P-TMSI in a pool in the prior art
  • FIG. 3 is a schematic diagram of an MME Pool allocation for a temporary mobile subscriber identity in an overlapping area in the prior art
  • FIG. 4 is a flowchart of a method for identifying a user equipment in an evolved network according to an embodiment of the present invention
  • 5 is a schematic diagram of setting a Pool-id non-unique in a PLMN according to an embodiment of the present invention
  • FIG. 6 is a flowchart of reselecting a mobility management entity according to an embodiment of the present invention
  • FIG. 7 is a flowchart of a first application example of reassigning a temporary mobile subscriber identity of a SAE system according to an embodiment of the present invention
  • FIG. 8 is a flowchart of a second application example of reassigning a temporary mobile subscriber identity of a SAE system according to an embodiment of the present invention
  • FIG. 9 is a flowchart of a third application example of reassigning a temporary mobile subscriber identity of a SAE system according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a temporary mobile subscriber identity transmission method of an SAE system according to an embodiment of the present invention
  • FIG. 11 is a flowchart of a temporary mobile subscriber identity allocation method of an SAE system according to an embodiment of the present invention
  • FIG. 12 is a temporary diagram of the SAE system of FIG. Specific signaling flow chart of the mobile subscriber identity allocation method
  • FIG. 13 is a flowchart of a method for transmitting and receiving information according to a temporary mobile subscriber identity of a SAE system according to an embodiment of the present invention
  • FIG. 14 is a schematic structural diagram of an apparatus for identifying a user equipment in an evolved network according to an embodiment of the present invention
  • FIG. 15 is a schematic structural diagram of a mobility management entity in an evolved network according to an embodiment of the present invention. detailed description
  • FIG. 4 it is a flowchart of a method for identifying a user equipment in an evolved network according to an embodiment of the present invention, where the method includes:
  • Step 401 Receive a temporary mobile subscriber identity of the SAE system allocated to the user equipment of the access network, where the temporary mobile subscriber identity of the SAE system includes at least: a resource pool identifier, a mobility management entity identifier, and a temporary identifier of the user equipment;
  • the user equipment is assigned a temporary mobile subscriber identity of the new SAE system in the access process, generally: the UE accesses the network for the first time, or the UE enters a new pool area from another pool, or the UE initiates a location update process network decision.
  • the UE is assigned a temporary mobile subscriber identity of the new SAE system, and the like.
  • Step 402 Temporarily identify the user equipment in the access evolved network by using the temporary mobile subscriber identity of the SAE system. That is, the temporary mobile subscriber identity evolved in the system architecture in the embodiment of the present invention.
  • SAE-TMSI System Architecture Evolved -Temporary Mobile Subscriber Identity
  • Pool-id resource pool identifier
  • MME-id mobility management entity identifier
  • UE temporary id temporary identifier
  • the pool-id is an id configured for the pool, and may be unique within the Public Land Mobile Network (PLMN) or may be repeated within the PLMN, but adjacent to the pool with the overlapping portion of the Pool-
  • PLMN Public Land Mobile Network
  • the id cannot be repeated, and the best implementation manner is that the pool-id set in the pool adjacent to the overlapping part is not repeated;
  • the MME-id is the id of the MME in the pool, and is unique within the pool;
  • the UE temporary id is a unique id that each MME can allocate to the UE.
  • the temporary mobile user identifier of the SAE system may further include a restart identifier (restart-id), that is, the field of the temporary mobile subscriber identifier of the SAE system includes: Pool-id, MME-id, The UE temporary id and restart-id are optimally set in the manner described above in the temporary mobile subscriber identity byte of the SAE system.
  • the restart-id is an identifier that prevents duplicate allocation when the MME restarts.
  • the restart-id can be incremented or decremented according to the number of restarts, or it can be a time value.
  • the temporary mobile subscriber identity of the SAE system may further include: an identifier that distinguishes the type of the communication system.
  • an identifier that distinguishes the type of the communication system.
  • distinguishing the universal mobile communication system UMTS/system network evolution architecture SAE or the identifier for distinguishing other different systems, that is, the field of the temporary mobile subscriber identity of the SAE system includes: Pool-id, MME-id, UE temporary id and difference
  • the id of the UMTS/SAE may also include the id of a different system than the UMTS/SAE. The best way to set it up is to add them in the manner described above in the temporary mobile subscriber identity bytes of the SAE system.
  • UMTS/SAE when the temporary mobile subscriber identity of the SAE system is the same as the number of bits used by TMSI/P-TMSI (ie 32 bits), the PSSI of the TMSI/P-TMSI can be reused.
  • CS bit such as 00/01 for CS; 10 for SAE, 11th generation ⁇ PS, etc.
  • the temporary mobile user identifier of the SAE system may also be added: restart-id and the id of the UMTS/SAE (or other system). That is, the fields of the temporary mobile subscriber identity of the SAE system include: Pool-id, MM E-id, UE temporary id, restart-id, and the id of the UMTS/SAE (or other system). The best way to set it up is to add them in this way in the temporary mobile subscriber identity byte of the SAE system.
  • the Pool-id can also carry a PLMN-id, that is, the Pool-id is composed of the identifiers of the Pools inside the MCC and the MNC and the PLMN.
  • the length of the id may be configured according to actual network conditions.
  • the design of the temporary mobile subscriber identity for the SAE system is not limited to the manner disclosed above, and may include other corresponding manners, and will not be described in detail herein.
  • the booster port, the MME-id, and the UE temporary id in the temporary mobile subscriber identity of the SAE system may also include a restart-id and/or an id of the UMTS/SAE (or other system).
  • the advantages of the temporary mobile subscriber identity of the SAE system are as follows: The following is an example of the pool-id, MME-id, and UE temporary id included in the temporary mobile subscriber identity of the SAE system:
  • the MME-id can be configured in the pool, regardless of the configuration of the MME of the adjacent pool. This is obviously different from the prior art.
  • the same network resource NRI cannot be allocated in the adjacent four pools (the NRI is equivalent to the MME id in the embodiment of the present invention, Since the two are in different networks (the NRI is in the UMTS system and the wake-up Eid is in the SAE), the names are different, because if the same NRI is assigned, there will be multiple UEs assigned to the same in the overlapping area.
  • TMSI/P-TMSI causing confusion, unable to page to the appropriate UE; that is, in the prior art, when adding/modifying/deleting the NRI configured by the core network node, it is necessary to consider other adjacent pools.
  • the core network node is added, modified, or deleted for the access user equipment in the pool.
  • NRI you need to consider the situation of other neighboring pools to avoid the recurrence of NRI. If you assign NRI to the connected user equipment, you need to notify other Pool, to prevent duplicate NRIs in adjacent pools.
  • all network resource identifiers need to be traversed. The processing is complicated, the processing speed is slow, and the user's satisfaction is low.
  • the Pool-id is configured in the pool, and the Pool-id of the adjacent pool is different.
  • the MME node is added/modified/deleted inside the Pool, and the MME is set. If the id is set, you can set the MME-id in the pool. You only need to avoid the same MME-id in the pool. You do not need to consider other pools. That is, in the embodiment of the present invention, the pool-id is configured in the pool, and the configuration of the adjacent pool may be disregarded when the MME is configured in the pool.
  • the temporary movement of the SAE system is carried.
  • the mobile subscriber identity, and the temporary mobile subscriber identity of the SAE system includes at least: a pool-id, an MME-id, and a UE temporary id; when the ENB receives the temporary mobile subscriber identity of the SAE system, first determines the UE according to the pool-id thereof The access is the pool. If the configuration of the pool-id exists in the current pool, the MME-id selects the corresponding MME, and selects the MME for the UE to complete the access of the UE. If the pool-id is not configured in the ENB, the new MME can be directly re-selected without having to traverse all the NRIs.
  • the benefits of setting a unique Pool-id within a full PLMN are:
  • the temporary mobile subscriber identity of the SAE system is unique in the PLMN, and the old MME can be directly found through the temporary mobile subscriber identity of the SAE system, because when the UE accesses the new In the case of the core network entity, the new core network entity can find the original core network entity according to the Pool-id and MME-id in the temporary mobile subscriber identity of the UE carrying the SAE system.
  • the prior art must identify the core network entity accessed by the original user equipment by combining the location area identifier TAI. It can be seen that the implementation process of the embodiment of the present invention is simpler than the prior art, and saves network resources.
  • the UE When the pool-id is unique in the full PLMN, the UE does not need to provide the Old TAI identifier when accessing the network, such as in a non-access stratum message such as an Attach Request or a Location Update Request (TAU Request) message. , do not need to carry Old TAI information.
  • a non-access stratum message such as an Attach Request or a Location Update Request (TAU Request) message.
  • the RAN adds the old LAI/RAI information of the UE in the Initial UE Message, the purpose of which is to distinguish the same TMSI/P-TMSI in different location areas, so that The core network node uniquely determines the UE by using the TSI in conjunction with the LAI. Therefore, the embodiment of the present invention may not add the current TAI of the UE to the initial UE message.
  • the user equipment accesses the new mobility management entity, and the SAE system carried by the new mobility management entity from the user equipment
  • the resource pool identifier and the mobility management entity identifier in the temporary mobile subscriber identity obtain the address information of the original mobility management entity; or when the resource pool identifier in the temporary mobile subscriber identity of the SAE system is multiple in the public land mobile network And obtaining the address information of the original mobility management entity by using the old location area identifier of the user equipment or the old location area identifier combined with the temporary mobile subscriber identity of the SAE system.
  • the new MME Since the temporary mobile subscriber identity of the SAE system in one MME is unique, in the UE attach procedure, the new MME does not need to carry the old TAI information in the identification request of the UE IMSI to the old MME. However, in the case of the flex, the new MME obtains the address information of the old MME through the temporary mobile subscriber identity of the old TAI and the SAE system (if the temporary mobile subscriber identity of the SAE system is unique in the full PLMN, the new MME passes the temporary mobile subscriber of the SAE system. The MME obtains the address information of the old MME.
  • the MME can forward the Identification Request to the real old MME through the temporary mobile subscriber identity of the SAE system.
  • the reason why the existing UMTS is to carry the old RAI information is to uniquely identify the UE with the P-TMSI.
  • the old MME retrieves the IMSI of the UE according to the temporary mobile subscriber identity information of the SAE system and returns it to the new MME through the identity response message. If the MME that receives the identity request is not the true old MME of the UE, the MME is based on the MME. The temporary mobile subscriber identity of the SAE system forwards the message to the real old MME, which then retrieves the IMSI based on the temporary mobile subscriber identity of the SAE system and feeds back to the new MME. In the existing UMTS system, IMSI needs to be determined together with the TAI according to the temporary mobile subscriber identity of the SAE system.
  • the temporary mobile user identity of the SAE system may be made unique at least in the pool, because the TA concept uses multiple or multiple location registration (multi-TA registration) methods. If the location list (TA list) allocated by the UE may be different, it is ensured that the temporary mobile subscriber identity of the duplicate SAE system cannot exist in the same TA in the TA list allocated by each UE. Therefore, the preferred embodiment of the present invention is SAE.
  • the temporary mobile subscriber identity of the system is unique within the pool.
  • the temporary mobile subscriber identity of the same SAE system cannot exist between the Pools with Overlapping. Otherwise, the temporary mobile subscriber identity of the repeated SAE system may appear in the overlapping part.
  • FIG. 5 is a method for setting a Pool-id in a PLMN according to an embodiment of the present invention.
  • FIG. 5 A schematic diagram of one. In the figure, there are 6 pools in an area, each pool has a pool-id, and the pool-id setting is not unique.
  • duplicate Pool-ids can be assigned between adjacent pools without overlapping, but this configuration is generally not recommended. If an idle state UE enters a neighboring pool from a pool, a TAU process is initiated. If the two pools are assigned a duplicate pool ID, the ENB accessing the UE may directly select the adjacent pool.
  • the MME corresponding to the MME-id does not trigger a new MME selection; or when the MME-id in the temporary mobile subscriber identity of the SAE system of the UE is in both pools, the new MME selection is not triggered. Therefore, if the Pool-id numbered 55 is set to 5, and the Pool-id numbered 56 is set to 6, that is, there is no duplicate Pool-id in the PLMN, it is a preferred embodiment of the present invention, such that when the UE Entering other pools will always initiate a new MME selection.
  • the MME Pool1 has a Pool-id of 1 and the MME Pool 2 has a Pool-id of 2, and the technical solution of the embodiment of the present invention is used.
  • the UE enters Poo 1 for the first time, the UE is accessed. 1 , ENB 1 finds that the pool-id in the temporary mobile subscriber identity of the SAE system is not configured, or is not equal to 1, then directly selects a new MME, and can select an MME according to the principle of load balancing.
  • the ENB2 directly selects the original MME according to the Pool-id and MME-id in the temporary mobile subscriber identity of the SAE system.
  • the new MME needs to obtain the address information of the old MME according to the old TAI of the UE. In the case of flex, it also determines the old information together with the information in the temporary mobile subscriber identity of the SAE system. Address information of the MME.
  • a UE initiates a TAU when it moves from a Pool to its Pool with the same Pool-id, and the initial direct message is sent.
  • the RAN node does not trigger according to the Pool-id and MME-id in the temporary mobile subscriber identity of the SAE system carried by the UE (assuming that the MME-id also exists in the new pool)
  • ENB the RAN node
  • the new MME selection procedure because the TAU request is sent to the same MME as the Pool-id and the MME-id (actually the MME is the MME of the new Pool, not the original MME); there is another case, adjacent or If the UE is detached, the temporary mobile user ID of the original SAE system is saved.
  • the UE When the UE detaches, it moves to the new pool and attaches again.
  • the Pool is the same as the Pool-id of the Pool when the UE is detached, and the new Pool also has the MME-id in the temporary mobile subscriber identity of the UE's SAE system, the same new MME selection process will not be triggered.
  • the accessed MME is not necessarily the most suitable, and it is preferable to trigger the selection process of the new MME.
  • the present invention also proposes a process of reselecting the MME in the above case. Refer to Figure 6 for the specific process. FIG.
  • FIG. 6 is a flowchart of triggering a re-selection of a mobility management entity according to an embodiment of the present invention.
  • Pool-id and MME-id in a temporary mobile subscriber identity of a pool-id, MME-id, and SAE system may occur.
  • this embodiment uses the TAU as an example to illustrate the specific re-selection process:
  • Step 601 The UE sends an initial DT message to the ENB.
  • the initial DT message includes: a NAS message, where the NAS message includes: a TAU Request, a temporary mobile user identifier of the SAE system; and further, the TAU Request May include TAI;
  • Step 602 After the ENB receives the initial DT message, the ENB selects the same MME as the Pool-id and the MME-id according to the Pool-id and MME-id carried in the temporary mobile user identifier of the SAE system (t ⁇ : ⁇ is MME1);
  • Step 603 The ENB sends an Initial UE Message to the MME1, where the information carries a TAU Request message.
  • Step 604 After receiving the TAU Request, the MME 1 knows that the MME1 is not the original MME of the UE according to the TAI information (except for the TAI, and may also be based on the SAE system in the NAS in the case of flex) The temporary temporary mobile subscriber identity together determines the original MME); then MME1 may decide to make a new MME selection, triggering the subsequent steps 605 to 607.
  • Step 605 The MME1 feeds back a rerouting command (Reroute Command) to the ENB;
  • Step 607 The ENB sends an Initial DT Message to the MME2.
  • Step 608 The remaining process of the TAU. This remaining process is a known process for those skilled in the art and will not be described herein.
  • an Attach or other process may be actually sent.
  • the selected MME such as MME1
  • the information may be obtained according to information such as the old TAI carried by the UE. Knowing the original MME), the selected MME1 may trigger the selection of a new MME (such as MME2), or the ENB may directly select a new MME (such as MME2), and insert the network into the server (NAS, Network Access).
  • the message is forwarded to the new MME2, and the selected MME1 sends a Reroute Command message to the RAN, causes the RAN to perform a new MME2 selection and resends the message to the new MME2, and may also select the MME1 to reselect the new MME2.
  • the NAS message is directly forwarded to the new MME2; or the selected MME1 reselects the new MME2, and the new MME2 information is notified to the RAN, and the RAN further initiates access to the new MME2.
  • triggering the new MME2 to send the Reroute Command; or triggering the selection of the new MME2 may also be that the selected MME1 load exceeds a certain threshold and is not suitable for carrying the new UE; or the selected MME1 finds that the request is a non-delay such as TAU or Attach. A high NAS request is required, otherwise the new MME2 selection process may not be triggered.
  • the embodiment of the present invention can also avoid the phenomenon of reselection by using the following process. For example, when the UE accesses the RAN, in addition to the temporary mobile subscriber identity of the SAE system, the old TAI is also reported to the RAN node. When the RAN node finds that the TAI does not belong to the current pool, the RAN node can directly select a new core network node. That is, the Intra Domain NAS Node Selector in the Initial Direct Transfer message sent when the UE accesses the RAN also includes the TAI.
  • each id configuration in the temporary mobile subscriber identity of the SAE system may be performed according to actual network conditions. For example: If you set up one pool per province, each MME has a capacity of 1 million users, and the pool in each province has a maximum of 6 adjacent pools, and each province has a maximum of 100 million users.
  • each id can be flexibly configured according to the network conditions.
  • the embodiment of the present invention further provides that the evolved network re-allocates the temporary mobile subscriber identity of the SAE system for the user equipment when the predetermined condition of the reallocation is satisfied.
  • FIG. 7 is a flowchart of a first application example of reassigning a temporary mobile subscriber identity of the SAE system according to an embodiment of the present invention.
  • the network can perform the temporary mobile subscriber identity reallocation of the SAE system (the temporary mobile subscriber identity reassignment of the SAE system).
  • the predetermined condition of the reallocation can be that the reallocation can be updated n times after the periodic location, or After changing the MME, or after changing the MME for n times, it triggers.
  • the MME designs a counter. When the UE accesses the network or periodically updates, the counter adds 1. When the threshold n is reached, the temporary mobile user identity of the SAE system is reassigned and sent to the UE, and the counter is reset.
  • Step 701 When the UE accesses the MME, the location update request is sent to the MME.
  • Step 702 The MME receives the location update request, and records the number of times of the location update by the counter. When the number of times the counter records reaches a certain threshold, step 703 is performed. Step 703: The MME allocates a temporary mobile subscriber identity of the new SAE system to the user equipment, and resets the counter.
  • Step 704 At the same time, the MME feeds back a location update accept message to the user, where the message carries the temporary mobile subscriber identity of the new S AE system.
  • the MME allocates the temporary mobile subscriber identity of the new SAE system, and sends the temporary mobile subscriber identity to the UE. Then the Counter is reset.
  • the threshold for example, the counter per UE access is incremented or the UE changes the MME increment or the UE initiates the TAU increment
  • FIG. 8 is a flowchart of a second application example of reassigning a temporary mobile subscriber identity of the SAE system according to an embodiment of the present invention.
  • the network may also be based on a timer. When the timer expires, the temporary mobile subscriber identity of the SAE system is re-allocated. When the timer expires, if the UE is in the idle state, the UE may access the network next time. Performing the allocation of the temporary mobile subscriber identity of the SAE system, or paging the UE to the reallocation of the temporary mobile subscriber identity of the SAE system, the specific implementation process is:
  • Step 801 When the MME allocates the temporary mobile subscriber identity of the SAE system to the UE, the timer timer is started, when the timer reaches the predetermined deadline; step 802;
  • Step 802 The MME sends the Paging information to the UE, that is, the paging is performed on the UE.
  • Step 803 The UE sends a service request message to the MME, where the message carries the temporary mobile subscriber identity requesting the new SAE system.
  • Step 804 The MME allocates a temporary mobile subscriber identity of the new SAE system to the user, and resets the timer.
  • Step 805 The MME sends a temporary mobile subscriber identity allocation message (a temporary mobile subscriber identity of the SAE system) of the SAE system to the UE, where the message includes a temporary mobile subscriber identity of the new SAE system.
  • a temporary mobile subscriber identity allocation message (a temporary mobile subscriber identity of the SAE system) of the SAE system to the UE, where the message includes a temporary mobile subscriber identity of the new SAE system.
  • Step 806 The UE feeds back to the MME the temporary mobile subscriber identity Reallocation accept message of the SAE system.
  • the MME when the MME allocates the temporary mobile subscriber identity of the SAE system to the UE, the timer Timer is started, and after the timer expires, the MME should allocate the temporary mobile subscriber identity of the new SAE system to the UE and send it to the UE.
  • the timer expires, if the UE is in the Idle state, the MME pages the UE, and after the UE accesses, allocates the temporary mobile subscriber identity of the new SAE system to the UE. If UE In the active state, steps 805 and 806 can be directly performed, and the temporary mobile user identity assigned to the new SAE system is sent to the UE without paging the UE. It may also be that after the Timer expires, the UE allocates the temporary mobile subscriber identity of the new SAE system to the UE when the UE accesses next time, and the process is similar to FIG. 8, but there is no paging process.
  • FIG. 9 is a flowchart of a third application example of reassigning a temporary mobile subscriber identity of the SAE system according to an embodiment of the present invention.
  • the UE side maintains the Timer and Counter similar to the above. After the Timer or Counter expires, the UE initiates the process of the temporary mobile subscriber identity Reallocation of the SAE system.
  • the specific process includes:
  • the UE itself maintains whether the temporary mobile subscriber identity of the SAE system should be allocated. If the UE sets the Timer expiration, it initiates a TAU request, which includes a request for the network to reassign the temporary mobile subscriber identity of the SAE system. After receiving the TAU request, the network allocates a temporary mobile subscriber identity of the new SAE system to the UE and sends it to the UE.
  • TAU request includes a request for the network to reassign the temporary mobile subscriber identity of the SAE system.
  • the network allocates a temporary mobile subscriber identity of the new SAE system to the UE and sends it to the UE.
  • the specific implementation process is:
  • Step 901 After the time of the user equipment expires, send a TAU request to the MME, where the TAU request includes a request for reallocating the temporary mobile subscriber identity of the SAE system (ie, step 902);
  • Step 903 The MME allocates a temporary mobile subscriber identity of the new SAE system to the user, and feeds back to the user equipment by using a location update accept message (ie, step 904);
  • Step 905 The UE sends a location update complete message to the MME.
  • the method for the access network to identify the temporary mobile subscriber identity of the SAE system in the existing UMTS, carries the Initial Direct Transfer in the RRC message sent by the UE when accessing the RAN, where the Initial Direct Transfer includes an Intra Domain NAS Node. Selector field, which can include P-TMSI.
  • the NAS field may also be carried.
  • the NAS is a message that the UE directly goes to the core network, such as a RAU or an Attach Request, and may also include a P-TMSI in the RAU or Attach Request, so the P-TMSI is in the Initial. There are 2 in Direct Transfer. In this way, for wireless air interface, resources are wasted more.
  • the Radio Resource Control (RRC) message transmitted when the UE accesses the RAN carries the Initial Direct Transfer
  • the Initial Direct Transfer includes an in-domain non-access stratum node selection (Intra Domain NAS Node). Selector) field, which may include P-TMSI.
  • the NAS field may also be included.
  • the NAS is a message that the UE directly goes to the core network, such as a RAU or an Attach Request, and may also include a P-TMSI in the RAU or Attach Request, so the P-TMSI There are 2 in Initial Direct Transfer. This way In terms of wireless air interface, resources are wasted more.
  • the present invention provides two embodiments to solve this problem in the case of a current waste of resources, including:
  • An embodiment of the present invention provides a method for transmitting a temporary mobile subscriber identity of a SAE system, where the method is applicable to a user equipment transmitting a temporary mobile subscriber identity of a SAE system to a core network, and a flowchart thereof is shown in FIG. 10, and the method includes:
  • Step 100 Send, when the user equipment accesses the evolved network, the radio resource control request message that carries the initial direct transmission message to the evolved radio access network entity in the evolved network, where the request message includes
  • the temporary mobile subscriber identity and the non-access stratum message of the SAE system does not carry the temporary mobile subscriber identity of the SAE system;
  • the radio resource control request message carrying the initial direct transmission message is sent to the evolved radio access network entity, where the message includes the temporary mobile subscriber identity carrying the SAE system and the non-connection Incoming message NAS, and in the NAS message (such as Attach,
  • the TAU request, etc. does not need to carry the temporary mobile subscriber identity of the SAE system.
  • the core network obtains the temporary mobile subscriber identity information of the SAE system by using the temporary mobile subscriber identity of the SAE system carried in the initial user equipment message.
  • the temporary mobile subscriber identity information of the S AE system is not required to be acquired by the S-TMS carried in the NAS message.
  • Step 101 The evolved radio access network entity establishes a signaling connection with the mobility management entity through the interface S1, and puts the temporary mobile user identifier of the SAE system into the initial user equipment message through the interface S1, and passes the initial user equipment.
  • the message provides the temporary mobile subscriber identity of the SAE system to the core network node.
  • the core network node obtains the temporary mobile subscriber identity information of the SAE system by using the temporary mobile subscriber identity of the SAE system carried in the initial user equipment message, instead of obtaining the SAE system by using the temporary mobile subscriber identity of the SAE system carried in the NAS message.
  • Temporarily moving the user identification information thereby saving the overhead of temporarily carrying the temporary mobile subscriber identity of the SAE system in the NAS, and reducing the resource overhead of the air interface and the S1 interface.
  • the temporary mobile subscriber identity of the SAE system is included in the RRC part of the Initial Direct Transfer, such as the Intra Domain NAS Node Selector field, and the RAN node will connect the SAE when further connecting to the SI-MME connection.
  • the system's temporary mobile user ID is placed Create a message for the Sl-AP. That is, the initial NAS message is originally carried in the RRC and the S1-AP, and the original P-TMSI is directly provided by the UE to the core network node through the NAS.
  • the temporary mobile user identifier of the SAE system only needs to be It is provided once, that is, it is not carried in the NAS message, and is only carried in the RRC, and is provided by the UE to the RAN, and the RAN is further provided to the core network node through the S1-AP initial setup message.
  • the embodiment of the present invention further provides a method for allocating a temporary mobile user identifier of a SAE system.
  • the flowchart of the method is as shown in FIG. 11, and the method includes:
  • Step 110 Calculate the temporary mobile subscriber identity of the assigned SAE system, where the temporary mobile subscriber identity of the SAE system satisfies: ⁇
  • the paging group calculated by the temporary mobile subscriber identity of the SAE system is calculated according to the international mobile subscriber identity. The paging group is consistent;
  • Step 111 When paging the user equipment, send a paging message carrying the temporary mobile subscriber identity of the SAE system to the evolved radio access network entity, and the paging message does not carry the international mobile subscriber identity;
  • Step 112 The evolved radio access network entity calculates a paging group of the user equipment according to the temporary mobile subscriber identity of the SAE system, and pages the user equipment.
  • the temporary mobile subscriber identity of the SAE system allocated by the MME for the user equipment is determined by an algorithm to make the paging group calculated according to the temporary mobile subscriber identity of the SAE system consistent with the paging group calculated by the IMSI. If the two are consistent, the MME only needs to carry the temporary mobile subscriber identity of the SAE system without carrying the IMSI to the RAN side.
  • the RAN calculates the paging group of the UE and the UE according to the temporary mobile subscriber identity of the SAE system. Paging.
  • the MME allocates the temporary mobile subscriber identity of the SAE system to use an algorithm to make the paging group calculated according to the temporary mobile subscriber identity of the SAE system consistent with the paging group calculated according to the IMSI, thus using DRX (
  • the MME only needs to carry the temporary mobile subscriber identity of the SAE system without having to carry the IMSI to the RAN side, and the RAN calculates the paging group calculated according to the temporary mobile subscriber identity of the SAE system. It is consistent with the IMSI, so it is not necessary to deliver the IMSI to the RAN, which saves the wireless air interface resources, and also avoids the IMSI exposure on the RAN side.
  • the specific algorithm for calculating the paging group is not limited. For example, by using a modulo operation, if the network needs 12 paging groups, the paging group of each IMSI is calculated according to (IMSI mod 12) +1, that is, the IMSI. As a number, divide by 12 to get the rest (from 0 to 11), a remainder of 0 for paging group 1, a remainder of 1 for paging group 2, and so on.
  • This embodiment is only a simple algorithm, and there is no limitation on the specific algorithm. On the basis of the specific algorithm, it is only necessary to ensure that the temporary mobile subscriber identity of the SAE system generated by the network satisfies the paging group obtained according to the algorithm and is consistent with the paging group calculated by the IMSI.
  • this embodiment specifically includes:
  • the user equipment UE sends an initial direct transmission (Initial DT) message of the RRC message to the ENB, where the initial direct transmission message carries the NAS message as an Attach Request, and in order to save resources, the NAS message does not carry the temporary mobility of the SAE system.
  • Initial DT initial direct transmission
  • SAE-TMSI User identification
  • the MME selects or reselects according to the temporary mobile subscriber identity of the SAE system in the RRC, and after determining the new MME, the ENB then relocates the NAS message and the temporary mobile subscriber of the SAE system.
  • the initial UE message carrying the S1-AP message sent to the new MME is identified; thus the new MME acquires the NAS message and the temporary mobile subscriber identity of the SAE system. That is, after receiving the Initial DT sent by the UE, the ENB sends an initial UE message to the new MME, where the message includes: a temporary mobile subscriber identity and an attach request of the SAE system;
  • the new MME may also send an identifier request to the old MME, where the identifier request includes the temporary mobile subscriber identity of the SAE system (you may not need to carry the old TAI), as shown by the dashed line in FIG. 12;
  • the embodiment of the present invention further provides a method for transmitting and receiving information according to a temporary mobile subscriber identity of a SAE system, and a flowchart of the method is shown in FIG.
  • the new mobility management entity sends an identity request or a context request to the old mobility management entity, and does not need to carry the old area identifier, including:
  • Step 131 If the temporary mobile subscriber identity of the SAE system is unique within the mobility management entity, in the attach procedure, the new mobility management entity sends an identifier request message carrying the temporary mobile subscriber identity of the SAE system to the old mobility management entity or a context request message, the request message does not carry the old area identifier; or, in the location update process of the mobility management entity, the new mobility management entity obtains the user equipment context request message from the old mobility management entity, the request Included in the message The temporary mobile subscriber identity of the SAE system does not carry the old location identification information;
  • Step 132 When the mobility management entity that receives the message is not the old mobility management entity of the user equipment, the mobility management entity resolves to the old mobility management entity according to the temporary mobile user identifier of the SAE system in the message. address.
  • An embodiment of the present invention further provides an apparatus for identifying a user equipment in an evolved network, and a schematic structural diagram thereof is shown in FIG. 14.
  • the apparatus includes: a receiving unit 141 and a temporary identifying unit 142.
  • the receiving unit 141 is configured to receive, by the user equipment that accesses the evolved network, a temporary mobile subscriber identity of the temporary mobile subscriber identity SAE system that is evolved by the system architecture.
  • the temporary mobile subscriber identity of the SAE system includes at least: a resource pool identifier, The mobility management entity identifier and the temporary identifier of the user equipment; the temporary identification unit 142 is configured to temporarily identify the user equipment in the access evolution network by using the temporary mobile subscriber identity of the SAE system.
  • the temporary identification unit 142 includes: a determining subunit 1421, a selecting subunit 1422, and a reselecting subunit 1423 (shown by a broken line in the figure).
  • the determining sub-unit 1421 is configured to determine whether the resource pool identifier and the mobility management entity identifier in the temporary mobile subscriber identity of the SAE system of the access request of the user equipment are the same as the configuration in the current resource pool, and the determination is yes.
  • the result is sent to the selection sub-unit 1422, and the result of the determination is sent to the re-selection sub-unit 1423.
  • the selection sub-unit 1422 is configured to select a corresponding mobility management entity for the user equipment according to the determination result of the yes; the re-selection The unit 1423 is configured to re-select a new mobility management entity for the user equipment according to the result of the judgment, or the load balancing principle and the resource pool identifier in the temporary mobile subscriber identity of the SAE system are unique in the public land mobile network. .
  • the device can be integrated in an evolved radio access network entity.
  • the embodiment of the present invention further provides a mobility management entity in an evolved network.
  • the structure of the mobility management entity is shown in FIG. 15.
  • the device includes: a temporary identifier allocation unit 151 and/or a temporary identifier redistribution unit 152.
  • the temporary identifier allocation unit 151 is configured to allocate, to the user equipment accessing the evolved network, a temporary mobile subscriber identity of the temporary mobile subscriber identity SAE system of the system architecture evolution, where the temporary mobile subscriber identity of the SAE system includes at least: a resource pool identifier, The mobility management entity identifier and the temporary identity of the user equipment.
  • the temporary identifier redistribution unit 152 is configured to reallocate the temporary mobile subscriber identity of the SAE system for the user equipment that satisfies the predetermined condition of the reallocation.
  • the temporary identifier redistribution unit 152 includes at least one of: a predetermined threshold redistribution subunit 1521 and/or a timer reallocation subunit 1522 and / Or location update redistribution sub-unit 1523 and/or redistribution sub-unit 1524.
  • the predetermined threshold re-allocation sub-unit 1521 is configured to re-allocate the temporary mobile subscriber identity of the SAE system for the user equipment when the update count of the mobility management entity reaches a predetermined threshold; the timer re-allocation sub-unit 1522, for moving After the expiration of the timer opened by the sexual management entity to allocate the temporary mobile subscriber identity of the SAE system, the user equipment is reassigned the temporary mobile subscriber identity of the SAE system; the location update re-allocation sub-unit 1523 is configured to receive the user equipment setting. When the timer expires and the location update request with the temporary mobile subscriber identity of the SAE system is sent, the temporary mobile subscriber identity of the SAE system is reassigned to the user equipment.
  • the re-allocation sub-unit 1524 is configured to: initiate a location update request with a temporary mobile subscriber identity of the SAE system or a temporary mobile subscriber of the SAE system when the location area of the user equipment record update or the count of the unit time reaches a predetermined threshold Identify the redistribution request and reassign the temporary mobile subscriber identity of the SAE system for the user equipment.
  • the temporary identifier assigning unit 151 in this embodiment may be connected to the receiving unit 141 in FIG. 14, but the predetermined threshold reallocating subunit 1521, the timer reallocating subunit 1522, and the location update reassigning subroutine in this embodiment.
  • Unit 1523 and redistribution subunit 1524 may be coupled to selection subunit 142 or reselection subunit 143 of FIG. 14, respectively.
  • the embodiment of the present invention sets different identifiers in the temporary mobile subscriber identity of the SAE system, and the temporary mobile subscriber identity of the SAE system combines with the characteristics of the SAE network to enter the pool-id. Since the multi-TA registration method is adopted, each UE can allocate multiple TAs. To ensure that there is no temporary mobile subscriber identity of the same SAE system in the TA, the temporary mobile subscriber identity of the SAE system needs to be unique within the pool. . The neighboring pools with the Overlapping should not have the same temporary mobile subscriber identity of the SAE system. Therefore, the Pool-id pooling can ensure the uniqueness of the registration area of the temporary mobile subscriber identity of the SAE system.
  • the Pool-id can be only in the entire PLMN, so that the temporary mobile subscriber identity of the SAE system is unique throughout the PLMN.
  • the advantage is that the new MME can find the old one through the temporary mobile subscriber identity of the UE's SAE system.
  • the MME acquires the UE context, and does not need to combine the TAI, so the UE does not need to carry the TAI.
  • the Pool-id can also be unique within the PLMN, and can be repeated between the Pools without Overlapping, but try to set the adjacent pools to be non-repeating to prevent the new MME selection from being triggered; this method can save the temporary of the SAE system.
  • the bit of the mobile subscriber identity is moved, but the new MME needs to combine the TAI to find the old MME.
  • the embodiment of the present invention passes the temporary mobile user standard in the SAE system.
  • a different identifier is set in the identification, that is, a temporary identifier that is not limited to the resource pool identifier, the mobility management entity identifier, and the user equipment.
  • the temporary mobile user of the SAE system is allocated to the user equipment.
  • the resource pool identifier is configured in the temporary mobile subscriber identity of the SAE system.
  • the embodiment of the present invention can carry only the temporary mobile user identifier of the SAE system in the sent message, and does not need to carry the old area identifier, thereby saving transmission resources.

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Description

识别用户设备的方法和装置及临时标识传递和分配方法 本申请要求于 2007 年 7 月 27 日提交中国专利局、 申请号为 200710137637.5、 发明名称为"识别用户设备的方法和装置及临时标识传递和 分配方法"的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术 ,特别是涉及识别用户设备的方法和装置及临时标识 传递和分配方法。
背景技术
随着网络的发展， 在 3GPP中， 各厂商积极研究长期演进网络（LTE, Long Term Evolved ) /***架构演进网络 ( SAE, System Architecture Evolved )， 其结 构示意图如图 1所示， 包括：
移动性管理实体 11 ( MME , Mobility Management Entity )的功能是保存 UE 的移动性管理上下文， 如用户的标识， 移动性管理状态、 位置信息等， 并对非 接入层 （NAS， Non Access Stratum)信令进行处理， 负责 NAS信令的安全等。
SAE网关 (SAE GW)包括服务网关 121(S-GW, Serving Gateway)和分组数据 网络网关 122 ( P-GW, PDN Gateway )。 S-GW与 P-GW是两个逻辑实体， 可以 存在于同一个或不同的物理实体上。
该 S-GW上保存 UE的用户面上下文， 如 UE的 IP地址和路由信息， 执行合法 监听、分组数据路由功能等。 S-GW与 MME之间的接口 S11 , 负责 MME、 S-GW 之间通信， 进行 UE的移动性管理信息与会话控制信息等交互。
MME 11通过 S 1 -MME , S-GW通过 S 1 -U分别与演进通用陆地无线接入网 ( E-UTRAN, Evolved-Universal Terrestrial Radio Access Network ) 负责控制面 和用户面的连接。 同时 MME11通过 S3接口， S-GW通过 S4接口分别与 2G/3G SGSN连接，分别负责 UE在 3G和 SAE网络之间的移动性控制面锚点和用户面锚 点功能。
该 P-GW122负责 UE接入到分组数据网的用户面锚点功能，通过 SGi参考点 与外部分组数据网进行通信，具有分组路由和转发的功能， 并负责策略计费增 强功能、 基于每个用户的分组过滤功能等。 P-GW122通过 S5或 S8 (漫游情况 下）接口与 S-GW121进行相连， 传递承载建立 /修改 /删除等控制信息， 以及分 组数据路由等。
策略计费规则功能 13 (PCRF , Policy and Charging Rules Function)通过 S7接 口向 P-GW传递 QoS和计费策略控制信息等。
在该***演进网络架构中涉及到临时移动用户标识 TMSI ( Temporary Mobile Subscriber Identity )的概念。在现有 UMTS***中 ,也涉及到 TMSI概念。 在 CS域下称为 TMSI, 在 PS域下称为分组临时移动用户标识 P-TMSI ( Packet TMSI ) ， 其引入的目的是防止国际移动用户标识 IMSI ( International Mobile Subscriber Identity )在空口暴露而导致被人跟踪等， 泄露用户的私密性。 因此， 在用户附着网络后， SGSN或 MSC会分配给 UE—个 TMSI或 P-TMSI, 比如， 服 务通用分组无线业务 GPRS ( General Packet Radio Service ) 支持节点 SGSN ( Serving GPRS Supporting Node )给 UE分配 P-TMSI, 移动交换中心 MSC ( Mobile Switching Centre )给 UE分配 TMSI。 该 TMSI在 UE的位置区 （ LA， Location Area )或该 P-TMSI在路由区 （RA, Routing Area )是唯一的， 其中， 一个 LA可以有若干个 RA。 当用户接入网络时， 会用 TMSI或 P-TMSI来作为用 户的标识， 当用户有下行寻呼时， 也通过 TMSI或 P-TMSI来寻呼 UE, 若 UE在 寻呼信道上发现包含自己的 TMSI或 P-TMSI的寻呼信息， 就发起接入。
此外， 该 TMSI/P-TMSI的作用还有在 UE接入新的核心网结点时， 在未引入 Iu-flex的概念下， 新的节点通过 LAI或 RAI ( LA或 RA标识）来查找旧的节点来 获取 UE的上下文，由于 Iu-flex的存在，只通过 LAI/RAI来查找旧节点是不够的， 因此还要通过结合 TMSI/P-TMSI来一起确定旧节点。 其中， 该 Iu-flex, 即在 Iu 接口上， 存在接入网络设备和核心网设备之间多对多的对应关系， 比如， 一个 RNC连接多个 SGSN, 而一个 SGSN也可以接入多个 RNC。 该多个 SGSN就组成 一个资源池（Pool ) , 在一个 Pool内， 有多个核心网节点 （如 SGSN )与 Pool 内的所有无线接入网 （RAN, Radio Access Network )节点 （如 RNC )相连， 而不是传统模式的一个接入网节点只能连接一个核心网节点。
另外 , TMSI/P-TMSI还可以在 Iu-flex的情况下由 RAN根据 TMSI/P-TMSI中 的信息来找到 UE注册的节点。 具体实现过程为：
TMSI/P-TMSI中有 0到 10可配置的 bit来表示网络资源标识（ NRI, Network Resource Identifier ) , NRI是在资源池（ Pool ) 内用来区别不同的核心网节点 的， 这样， 当 UE第一次接入 Pool时， 由于 RAN节点无法通过 NAS节点选择功 能（ NNSF, NAS Node Selection Function )找到对应 NAS， 则根据负载分担等 原则选择一个合适的核心网节点， 在该 Pool内移动， 该 UE始终不会更改该节 点， 其原理就是， 核心网节点给 UE分配一个 TMSI或 P-TMSI, 其中携带代表该 核心网节点的 NRI,这样，当 UE在接入时，在向 RAN发送的初始直传消息（ Initial Direct Transfer ) 中携带 TMSI或 P-TMSI , RAN节点根据接收到 TMSI/P-TMSI 中的 NRI,直接选择 NRI对应的原来注册的核心网结点上，这样就实现了在 Pool 内移动不改变核心网节点的目的。 当然， 在 UE移动出 Pool后， 由于 RAN节点 找不到对应的 NRI, 因此会重新选择新的核心网节点， UE在新的 Pool内移动仍 然不会改变该节点。
其中，现有的 TMSI/P-TMSI的组成共 32bit， 包括： 若干 bit的用于区分 PS/CS (一般为两位） 、 可配置的 0到 lObit用于 NRI ( 0表示没有 flex ) 、 若干位用于 重启动 （restart )标记和若干位的其他 bit, 其中， 该 bit可以根据网络部署情况 进行适应型分配。
例如， 在一个 TMSI/P-TMSI中， 其中 2bit用来区分是 TMSI还是 P-TMSI;
5bit用于 restart标记， 该标记的主要目的是防止节点重起引起分配已经分配的 TMSI, 导致 TMSI分配重复； 此外， 还有 7bit用于 NRI, 剩下 18bit可用作每个核 心网设备分配 UE的标识。
再比如， 目前，现有技术在 Pool内设计 TMSI/P-TMSI的示意图，如图 2所示， 包括 Pool21， Pool22、 Pool23、 Pool24、 Pool25和 Pool26。 其中， Pool21的 NRI 包括 16至 20; Pool22的 NRI包括 11至 15; Pool23的 NRI包括 1; Pool24的 NRI包 括 6至 10; Pool25的 NRI包括 1至 5; Pool26的 NRI包括 11。其过程为：如图所示， 假如网络状况为： Pool21、 Pool22、 Pool24和 Pool25有重叠部分， 每个 Pool中 有 5个核心网设备， 该设备用不同的 NRI来区别， 在不相邻的 Pool中， 可以使用 重复（ Reuse )的 NRI, 因为不会影响 NAS节点选择功能和 UE在寻呼区域 TMSI 的唯一性。 支设每个核心网设备最大能附着 100万用户， 而 Pool重叠区域中有 1200万用户， 其他区域的用户数较少。
在该网络中， 20个核心网设备足够附着 1200万用户。 NRI可设为 5bit (因 为 25=32,可供 32个核心网设备标识），每个设备的独立分配的标识为 21bit( 100 万 =22G, 可供 200万用户）， 2bit为 PS/CS区别用， 剩下 32-5-2 l-2=4bit用作 restart 使用。
在 SAE网络中， 仍然有 Flex的设计， 类似现有方法， 在一个 Pool内， 有 多个 CN节点（如 MME )与 Pool内的所有 RAN节点（如 ENB )相连， 当一 个 UE初始进入 pool, RAN节点能够根据负载分担原则等选择一个 CN节点， 这样 UE在这个 pool内移动或接入，始终锚定在选定的 CN节点。而由于 SAE 网络中存在 MME和 S-GW两个与 ENB连接的节点 ,就有 MME Pool和 S-GW Pool两个概念， 且在 SAE网络中， 也允许 Pool的 Overlapping (重叠）， 此外， SAE网络规定 , MME Pool或 S-GW Pool包含完整的位置区域（ TA, Track area )。 TA是类似 UMTS网络中 LA/RA的概念。
请参阅图 3 , 为现有技术中 MME Pool为重叠区域内临时用户标识分配的示 意图， 在该图中， 假设 UE每次分配一个 TA, UE第一次进入 MME Pooll , 如 UE进入 ENB1 , 则从 MME Pool l (简称 MP1 ) 中选择一个 MME, 在移动过程 中从 ENB 1到 ENB2到 ENB3都不需要更 MME , 直到进入 ENB4 , 由于该 ENB4 与源 MP1中的 MME没有接口 （该 ENB4只属于 MP2 ) , 则需要重新选择 MP2中 的 MME。 图中ENB2和ENB3属于两个MME Pool, 即与两个 Pool中的所有 MME 都有接口， 于是 ENB2和 ENB3就是 MME Pool 1和 2 的 overlapping部分。 该 Overlapping的益处在于 , 当 UE从 ENB4再返回 ENB3 , 由于 ENB3与 MME Pool2 有连接， 因此不需要重新选择 MME, 直到进入 ENB1才会再次选择 MME, 即 overlapping避免了乒乓效应（即 MME的乒乓 relocation )。试想如果 ENB3与 MME Pool2没有接口， 那么 UE在 ENB3和 ENB4之间来回移动 , 则要发起乒乓效应。
对于 TA概念， SAE网络允许分配给 UE多个 TA,这与 UMTS网络是不同的， UTMS网络下 , 网络只能分配给 UE—个 LA或 RA。 这样如果上图中 UE在 Pool 注册， 且分配 TA list为 TA1和 TA2, 则 UE在 ENB1和 ENB2之间来回移动也不需 要发起更新了， 即 UE在分配的 TA list内移动时不需要发起更新的。
发明内容
本发明实施例提供一种演进网络中识别用户设备的方法及装置 , 通过在 SAE ***的临时移动用户标识 ( SAE-TMSI, System Architecture Evolved- Temporary Mobile Subscriber Identity ) 中设置资源池标识， 以加快接入设备更 新的与处理问题， 并简化运营商的对网络资源的配置。
本发明实施例解决的另一技术问题是提供一种演进网络中的移动性管理 实体、 SAE***的临时移动用户标识传递和分配方法以及才 据 SAE***的临 时移动用户标识收发信息的方法， 以减少无线空口资源的浪费。
为解决上述问题， 本发明实施例提供一种演进网络中识别用户设备的方 法， 所述方法包括步骤：
当用户设备接入演进网络时， 所述演进网络为该用户设备分配 SAE*** 的临时移动用户标识， 所述 SAE***的临时移动用户标识至少包括： 资源池 标识、 移动性管理实体标识和用户设备的临时标识；
利用所述 SAE***的临时移动用户标识临时识别接入演进网络内的用户 设备。
本发明实施例还提供一种演进网络中识别用户设备的装置 , 所述装置包 括：
接收单元， 用于接收携带接入演进网络的用户设备分配 SAE***的临时 移动用户标识的接入请求， 所述 SAE***的临时移动用户标识至少包括： 资 源池标识、 移动性管理实体标识和用户设备的临时标识；
临时识别单元， 用于利用所述 SAE***的临时移动用户标识临时识别接 入演进网络内的用户设备。
本发明实施例还提供一种演进网络中的移动性管理实体， 包括：
临时标识分配单元， 用于为接入演进网络的用户设备分配 SAE***的临 时移动用户标识， 所述 SAE***的临时移动用户标识至少包括： 资源池标识、 移动性管理实体标识和用户设备的临时标识。
本发明实施例还包括一种 SAE***的临时移动用户标识传递方法， 适用 于用户设备向核心网传递 SAE***的临时移动用户标识， 包括步骤：
在用户设备接入 SAE演进网络时， 向 SAE演进网络中的演进无线接入网 络实体发送携带初始直传消息的无线资源控制请求消息， 该请求消息中包括
SAE***的临时移动用户标识和非接入层消息， 该非接入层消息中不携带 SAE ***的临时移动用户标识；
所述演进无线接入网络实体通过接口 S1与移动性管理实体建立信令连接 时， 通过接口 SI将所述 SAE***的临时移动用户标识放入初始用户设备消息 中，并通过初始用户设备消息将 SAE***的临时移动用户标识提供给核心网节 点。
本发明实施例再提供一种 SAE***的临时移动用户标识的分配方法， 包 括步骤：
计算分配的 SAE***的临时移动用户标识， 其中， 所述 SAE***的临时 移动用户标识满足： 根据所述 SAE***的临时移动用户标识计算的寻呼组与 才艮据国际移动用户标识（IMSI )计算的寻呼组一致；
当寻呼用户设备时， 将携带 SAE***的临时移动用户标识的寻呼消息发 送到演进无线接入网络实体， 所述寻呼消息中不携带国际移动用户标识；
所述演进无线接入网络实体根据 SAE***的临时移动用户标识计算用户 设备的寻呼组， 并对所述用户设备进行寻呼。
本发明实施例又提供一种根据 SAE***的临时移动用户标识收发信息的 方法， 包括步骤：
若 SAE***的临时移动用户标识在移动性管理实体内唯一，则在附着中， 新移动性管理实体向旧移动性管理实体发送携带 SAE***的临时移动用户标 识的标识请求消息或上下文请求消息， 所述请求消息中不携带旧的区域标识； 或者，在移动性管理实体的位置更新过程中，新移动性管理实体向旧移动性管 理实体获取用户设备上下文的请求消息， 所述请求消息中包括 SAE***的临 时移动用户标识， 不携带旧的位置标识信息；
当接收到该消息的移动性管理实体不是该用户设备的旧移动性管理实体 时， 所述移动性管理实体根据所述消息中的 SAE***的临时移动用户标识解 析到真正的旧移动性管理实体的地址。
附图说明
图 1为现有技术中长期演进网络 /***架构演进网络（SAE )结构示意图； 图 2为现有技术在 Pool内设计 TMSI/P-TMSI的示意图；
图 3为现有技术中 MME Pool为重叠区域内临时移动用户标识分配的示意 图；
图 4为本发明实施例中演进网络中识别用户设备的方法流程图； 图 5为本发明实施例在 PLMN内设置 Pool-id非唯一的示意图； 图 6为本发明实施例中移动管理实体重新选择的流程图；
图 7为本发明实施例 SAE***的临时移动用户标识重新分配的第一应用 实例的流程图；
图 8为本发明实施例 SAE***的临时移动用户标识重新分配的第二应用 实例的流程图；
图 9为本发明实施例 SAE***的临时移动用户标识重新分配的第三应用 实例的流程图；
图 10为本发明实施例 SAE***的临时移动用户标识传递方法的流程图； 图 11为本发明实施例 SAE***的临时移动用户标识分配方法的流程图； 图 12为图 11该 SAE***的临时移动用户标识分配方法的具体信令流程 图；
图 13本发明实施例根据 SAE***的临时移动用户标识收发信息的方法的 流程图；
图 14为本发明实施例中演进网络中识别用户设备的装置的结构示意图； 图 15为本发明实施例中演进网络中的移动性管理实体的结构示意图。 具体实施方式
下面结合附图及实施例对本发明作详细的说明。
请参阅图 4, 为本发明实施例演进网络中识别用户设备的方法流程图， 该 方法包括：
步骤 401 : 接收为接入演进网络的用户设备分配的 SAE ***的临时移动 用户标识， 该 SAE***的临时移动用户标识至少包括： 资源池标识、 移动性 管理实体标识和用户设备的临时标识；
其中， 用户设备在接入过程被分配新的 SAE***的临时移动用户标识， 一般在： UE第一次接入网络， 或 UE从其他 Pool进入新的 Pool区域， 或 UE 发起位置更新过程网络决定给 UE分配新的 SAE***的临时移动用户标识等 情况下。
步骤 402: 利用该 SAE ***的临时移动用户标识临时识别接入演进网络 内的用户设备。 也就是说， 本发明实施例在***架构演进的临时移动用户标识
(SAE-TMSI， System Architecture Evolved -Temporary Mobile Subscriber Identity,) 中增加资源池标识（Pool-id )、 移动性管理实体标识（MME-id )和用户设备的 临时标识（ UE temporary id )。 其中， 该 Pool-id是为该 Pool配置的 id, 可以在 公共陆地移动网（ PLMN, Public Land Mobile Network )内唯一，也可以在 PLMN 内重复，但相邻的具有 overlapping部分的 Pool中 Pool-id不能重复，其最佳的 实施方式是：在相邻且没有 overlapping部分的 Pool中设置的 Pool-id也不重复； 该 MME-id是在 Pool内 MME的 id, 在该 Pool内唯一； 该 UE temporary id是 每个 MME可分配给 UE的唯一 id。
优选的， 在本实施例中， 该 SAE***的临时移动用户标识中还可以增加重 启标识（restart-id ) , 即 SAE***的临时移动用户标识的字段中包括： Pool-id、 MME-id, UE temporary id和 restart-id, 其最佳的设置方式是在该 SAE***的临 时移动用户标识字节中以所述的方式顺序添加。其中，该 restart-id是防止 MME 重启时导致分配重复的标识， 该 restart-id可以根据重启次数递增或递减， 也可 以是带有时间数值。
优选的， 在本实施例中， 该 SAE***的临时移动用户标识中还可以增加： 区分通信***类型的标识。 比如， 区分通用移动通信*** UMTS/***网络演进 架构 SAE或用于区分其它不同***的标识， 即 SAE***的临时移动用户标识的 字段中包括： Pool-id, MME-id, UE temporary id和区别 UMTS/SAE的 id, 当然， 也可以包括除区别 UMTS/SAE外的其它不同***的 id。 其最佳的设置方式是在 该 SAE***的临时移动用户标识字节中以所述的方式顺序添加。 该区分
UMTS/SAE (或其它***） 的 id, —般在 SAE***的临时移动用户标识与 TMSI/P-TMSI使用一样 bit位数（即 32bit位） 时， 可重复使用 TMSI/P-TMSI的 PS/CS位， 如 00/01代表 CS; 10代表 SAE, 11代 ^PS等。
优选的， 在本实施例中， 该 SAE***的临时移动用户标识中还可以同时增 加： restart-id和区别 UMTS/SAE (或其它***） 的 id。 即 SAE***的临时移动 用户标识的字段中包括： Pool-id、 MM E-id, UE temporary id, restart-id和区 别 UMTS/SAE (或其它***） 的 id。 其最佳的设置方式是在该 SAE***的临时 移动用户标识字节中以该的方式顺序添加。 优选的， 所述 Pool-id还可以携带 PLMN-id, 即 Pool-id是由 MCC和 MNC和 PLMN内部的 Pool的标识组成。 需要说明的， 本发明实施例所涉及到的 id, 其 id的长度可以根据实际网络情况进行配置。 但是， 对于该 SAE***的临时移动 用户标识的设计并不限于上述公开的方式，也可以包括其它相应的方式，在此 不再伴细的说明。
本发明实施例中在 SAE***的临时移动用户标识中增力口 Pool-id、 MME-id, UE temporary id , 还可以包^ restart-id和 /或区别 UMTS/SAE (或其他***） 的 id, 其使用 SAE***的临时移动用户标识的优点， 下面以 SAE***的临时移动 用户标识中包括的 Pool-id、 MME-id和 UE temporary id为例来说明：
由于在 SAE***的临时移动用户标识中包括有 Pool-id，其在 Pool内可以自 行配置 MME-id， 而不用考虑相邻 Pool的 MME的配置情况。 这与现有技术明显的 不同， 在现有技术中（比如图 2所示）， 相邻的 4个 Pool中不能分配相同的网络 资源 NRI (该 NRI相当于本发明实施例中的 MME id, 由于二者处于不同的网络 ( NRI处于 UMTS***， 而醒 E id处于 SAE中） 中， 因此名称也不同， 因为， 如果 分配相同的 NRI ,将导致在 overlapping区域可能有多个 UE分配到相同的 TMSI/P -TMSI , 导致混乱， 无法寻呼到合适的 UE; 也就是说， 在现有技术中， 当添加 / 修改 /删除核心网节点配置的 NRI时， 需要考虑其他相邻 Pool的情况，避免出现 重复； 设置好某核心网节点的 NRI后， 也需要通知其他 Pool防止重复出现相同 的 NRI。 即在现有技术中， 当在 Pool内为接入用户设备添加、 修改或删除核心 网节点的 NRI中， 都需要考虑其它相邻 Pool的情况， 避免 NRI重复出现， 如果 为接入的用户设备分配 NRI , 也需要通知其它的 Pool , 防止在相邻的 Pool中出 现重复 NRI。 另外， 在移动用户的接入网络过程中， 需要遍历所有网络资源标 识， 其处理过程复杂， 处理速度慢， 用户的满意度低。
而对于本发明实施例来说， 由于在 Pool内配置了 Pool-id， 其相邻的 Pool设 置的 Pool-id不同， 在此基础上， 在 Pool内部添加 /修改 /删除 MME节点， 设置 MME-id时， 可自行在 Pool内设置 MME-id , 只要在本 Pool内避免出现相同的 MME-id即可， 不需要考虑其他 Pool的情况。 即本发明实施例由于在 Pool内配 置了 Pool-id, 在本 Pool内配置 MME时可以不考虑相邻 Pool的配置情况。
对于本发明实施例来说， 在 UE接入 ENB时， 由于携带 SAE***的临时移 动用户标识， 且该 SAE***的临时移动用户标识至少包括： Pool-id, MME-id 和 UE temporary id; 当该 ENB接收 SAE***的临时移动用户标识时， 首先根据 其中的 Pool-id判断 UE接入是那个 Pool ,如果在当前的 Pool中存在该 Pool-id的配 置，则再 MME-id选择对应 MME,并为该 UE选择该 MME,完成 UE的接入。 如果在 ENB中没有配置该 Pool-id时， 可直接进行新的 MME的重新选择， 而不 必遍历所有 NRI。
另外， 对于本发明实施例来说， 在全 PLMN内设置唯一的 Pool-id的好处在 于：
如果在全 PLMN内， Pool-id设置不重复， 则 SAE***的临时移动用户标识 在 PLMN唯一 , 通过 SAE***的临时移动用户标识可以直接查找到 old MME , 这是因为， 当 UE接入新的核心网实体时， 新的核心网实体根据该 UE携带 SAE ***的临时移动用户标识中的 Pool-id和 MME-id即可查找到原核心网实体。 而 现有技术必须通过结合位置区域标识 TAI才能找到原用户设备接入的核心网 实体。 由此可见， 本发明实施例的实现过程比现有技术处理简单， 节省网络资 源。
当 Pool-id在全 PLMN唯一时， UE在接入网络时， 就不需要提供 Old TAI标识 了， 如在附着请求（ Attach Request )或位置更新请求（TAU Request ) 消息等 非接入层消息中， 不需要携带 Old TAI信息。
当然， 当 UE接入旧有网络时， RAN在初始 UE消息（ Initial UE Message )中 添加 UE的旧 LAI/RAI信息， 其目的是为了区别不同位置区中分配相同的 TMSI/P-TMSI, 让核心网节点通过 TMSI结合 LAI来唯一确定 UE, 因此， 本发 明实施例也可以不将 UE当前的 TAI加入初始 UE消息中。
也就是说， 当 SAE***的临时移动用户标识中的资源池标识在公共陆地移 动网唯一时，在用户设备接入新移动性管理实体，新移动性管理实体从该用户 设备中携带的 SAE***的临时移动用户标识中的资源池标识和移动性管理实 体标识获取原移动性管理实体的地址信息；或者当 SAE***的临时移动用户标 识中的资源池标识在公共陆地移动网中为多个时，则利用该用户设备的旧的位 置区域标识或该旧的位置区域标识结合 SAE***的临时移动用户标识，来获取 原移动性管理实体的地址信息。 由于一个 MME内的 SAE***的临时移动用户标识唯一， 在 UE附着 （ UE attach )过程中， new MME向 old MME取 UE IMSI的标识请求（Identification Request ) 中不必携带 old TAI信息。 但在 flex情况下， new MME通过 old TAI、 SAE***的临时移动用户标识来获取 old MME的地址信息（如果 SAE***的临 时移动用户标识在全 PLMN唯一 ,则 new MME通过 SAE***的临时移动用户标 识就可获取 old MME的地址信息） , 如果 new MME获取的 old MME地址信息 并不是真正的 old MME, 则该 MME通过 SAE***的临时移动用户标识能向真 正的 old MME转发 Identification Request。 而现有的 UMTS下之所以要携带 old RAI信息， 是为了与 P-TMSI—起唯一确定 UE。 因为在一个 SGSN内， 可能出现 重复的 P-TMSI, 但一个 RAI内肯定是唯一的 P-TMSL 即 UE在附着过程中， 从 新 MME向旧的 MME请求 IMSI标识 , 由于新 MME根据 old TAI和 /或 SAE***的 临时移动用户标识已获取 old MME的地址信息 ,则向该 old MME发送标识请求 时只需携带 SAE***的临时移动用户标识参数而不用再携带 old TAI信息，当该 old MME就是 UE原来注册的 MME时 , old MME根据 SAE***的临时移动用户 标识信息检索 UE的 IMSI并通过标识响应消息返回给新的 MME,如果收到标识 请求的 MME不是 UE真正的 old MME时 ,该 MME根据 SAE***的临时移动用户 标识将该消息转发给真正的 old MME, old MME再根据 SAE***的临时移动用 户标识检索 IMSI并反馈给 new MME。 而在现有的 UMTS***中， IMSI需要根 据 SAE***的临时移动用户标识与 TAI结合起来一起确定。
在本发明实施例中， 可以使得 SAE***的临时移动用户标识至少在 Pool内 是唯一的， 由于位置区域概念 ( TA concept )使用多个或多种位置区域注册 ( multi-TA registration )的方式， 如果 UE分配的位置区域列表（ TA list )可以 不同， 则要保证在各 UE分配的 TA list中相同 TA中不能存在重复 SAE***的临 时移动用户标识， 因此， 本发明的最佳实施例是 SAE***的临时移动用户标识 在 Pool内唯一， 此外， 在有 Overlapping的 Pool之间， 也不能有相同的 SAE*** 的临时移动用户标识， 否则可能在 overlapping部分出现重复的 SAE***的临时 移动用户标识。 但并不限于这种方式， 也可以是其它的方式， 在此不再详细的 说明。
为了便于说明， 请参阅图 5， 为本发明实施例在 PLMN内设置 Pool-id不唯 一的示意图。 在该图中， 在一个区域内有 6个 Pool, 每个 Pool设置一个 Pool-id, 且 Pool-id的设置不唯一， 即非相邻的 Pool中可以配置相同的 Pool-id, 但并不限 于此，即标号为 51和 55的 Pool-id都设置为 1 ( Pool-id = 1 ) ,标号 53和 56的 Pool-id 设置为 2( Pool-id = 2 ) ,标号 52的 Pool-id设置为 3 ( Pool-id = 3 ) ,标号 54的 Pool-id = 4 ( Pool-id = 4 ) , 这样在 PLMN内可重复使用 PLMN-id, 从而节省了 bit位， 但在有 overlapping的 Pool之间 , 不能使用重复配置的 Pool-id , 为了防止在 overlapping部分出现重复的 SAE***的临时移动用户标识。 即在不相邻的 Pool 内是可以允许有重复的 SAE***的临时移动用户标识出现的 , 因为分配给一个 UE的 TA list是不会跨 Pool的， 因此不会出现相同的区域内有重复的 SAE***的 临时移动用户标识的情况。 在没有 overlapping的相邻 Pool之间， 原则上可以分 配重复的 Pool-id, 但一般情况下不建议此配置。 因为一个空闲 （idle )状态的 UE从一个 Pool进入相邻 Pool, 会发起 TAU过程， 如果这两个 Pool分配重复的 Pool-id, 则可能导致该 UE接入的 ENB直接选择相邻 Pool中的对应 MME-id的 MME, 不会触发新的 MME选择； 或者说当 UE的 SAE***的临时移动用户标识 中的 MME-id在两个 Pool都有时， 也不会触发新的 MME选择。 因此， 如果将标 号为 55的 Pool-id设置为 5， 标号为 56的 Pool-id设置为 6， 即 PLMN内不存在重复 的 Pool-id, 则为本发明的最佳实施例， 这样当 UE进入其它 Pool, 总会发起新的 MME选择。
请一并参阅图 3和图 5， 假设 MME Pooll的 Pool-id = 1 , MME Pool2的 Pool-id = 2,使用本发明实施例该技术方案， 当 UE第一次进入 Poo 1 ,接入 ENB 1 , ENB 1 发现其 SAE***的临时移动用户标识内的 Pool-id没有配置， 或不等于 1， 则直 接进行新的 MME的选择，可以根据负载平衡等原则选择一个 MME。 当 UE移动 到 ENB2, 并发起接入时， ENB2根据 SAE***的临时移动用户标识中的 Pool-id 和 MME-id,直接选择到原来的 MME上。 当 UE移动到 ENB4时，触发 TAU过程， ENB4发现 Pool-id没有配置 （ ENB4只配置 Pool-id=2 ) , 则直接进行新的 MME 的选择过程。在更换 MME时， new MME要向 old MME取 UE的上下文（Context ) 信息或标识信息，当 SAE***的临时移动用户标识的 Pool-id为全 PLMN唯一时， new MME直接根据 UE的 SAE***的临时移动用户标识中的 Pool-id和 MME-id (可能还参考 MCC和 MNC信息， 即 PLMN信息） 即可获取 old MME的地址信 息。 当 Pool-id在全 PLMN中不唯一时 , new MME要根据 UE的 old TAI来获取 old MME的地址信息， 在 flex的情况下， 还要结合 SAE***的临时移动用户标识中 的信息一同确定 old MME的地址信息。
另夕卜，当网络中出现： 当相邻的无 Overlapping区域的 Pool配置相同的 Pool-id 时， 一个 UE从一个 Pool移动到其相邻同 Pool-id的 Pool时发起 TAU,初始直传消 息到达 RAN (—般是指 ENB )侧， RAN节点根据 UE携带的 SAE***的临时移 动用户标识中的 Pool-id与 MME-id (假设该 MME-id在新 Pool也存在） ， 则不会 触发新的 MME选择过程 , 因为将 TAU请求发送到 Pool-id与 MME-id相同的 MME上（实际上该 MME是新 Pool的 MME, 不是原来的 MME ) ； 还有另外一 种情况， 相邻或不相邻的 Pool配置相同的 Pool-id， 当 UE分离 （detach ) 时， 将 原来的 SAE***的临时移动用户标识保存下来， 当 UE detach后移动到新的 Pool 再次附着 （attach ) , 当新的 Pool与 UE detach时 Pool的 Pool-id相同， 且新 Pool 也存在 UE的 SAE***的临时移动用户标识中的 MME-id时，同样新的 MME选择 过程也不会触发。 在这种情况下， 接入的 MME不一定是最适合的， 最好能触 发新的 MME的选择过程。 为此， 本发明还提出一种上述情况下重新选择 MME 的流程。具体流程参考图 6。该图 6为本发明实施例中触发移动管理实体重新选 择的流程图； 在该图中， 由于可能出现 Pool-id与 MME-id与 SAE***的临时移 动用户标识中 Pool-id与 MME-id相同但实际 MME发生改变的情况，本实施例以 TAU为例来说明， 具体重选择的过程为：
步骤 601 : UE向 ENB发送初始 DT消息（Initial DT Message ) , 该初始 DT消 息中包括： NAS消息， 该 NAS消息中包括： TAU Request, SAE***的临时移 动用户标识； 进一步， 所述 TAU Request中可能包括 TAI;
步骤 602： 当该 ENB接收到该初始 DT消息后 , ENB根据 SAE***的临时移 动用户标识中携带的 Pool-id和 MME-id , 选择与 Pool-id和 MME-id相同的 MME ( t匕:^为 MME1 ) ；
步骤 603: 该 ENB向该 MME1发送 Initial UE Message , 该信息中携带 TAU Request消息；
步骤 604: 该 MME 1收到 TAU Request后， 根据 TAI信息得知 MME1并不是 UE的原来接入的 MME (除了 TAI, 在 flex的情况下可能还根据 NAS中的 SAE系 统的临时移动用户标识一起确定原来的 MME ) ； 于是 MME1可能决定进行新 的 MME选择， 触发后续 605至 607步骤。
步骤 605: 该 MME1向 ENB反馈重路由命令 ( Reroute Command ) ； 步骤 606: 该 ENB收到重路由命令后， 执行重新选择， 如选择的新的 MME 为 MME2;
步骤 607: 该 ENB向 MME2发送 Initial DT Message;
步骤 608: TAU的剩余过程。 该剩余过程对于本领域技术人员为已知过程， 在此不再赘述。
当然， 对于本发明实施例在实际发送的 Attach或其他过程也可能出现这样 的情况， 比如， 当选择的 MME (比如 MME1 )发现不是 UE原来的 MME时（可 以根据 UE携带的 old TAI等信息得知原来的 MME ) , 该选择的 MME1可触发新 的 MME(比如 MME2 )的选择，也可以是 ENB直接进行新的 MME(比如 MME2 ) 的选择， 并将网 ^矣入服务器（NAS， Network Access Server ) 消息转给新的 MME2, 该选择的 MME1发送 Reroute Command消息到 RAN, 让 RAN进行新的 MME2的选择并将消息重新发到新的 MME2上； 还可以是选择的 MME1重新选 择新的 MME2, 将 NAS消息直接转给新的 MME2; 还可以是选择的 MME1重新 选择新的 MME2, 并将新的 MME2的信息通知 RAN, RAN进一步向新的 MME2 发起接入。 触发新的 MME2发送 Reroute Command; 或触发新的 MME2的选择 的前提也可以是选择的 MME1的负载超过一定门限不适合承载新的 UE; 或选 择的 MME1发现该请求为 TAU或 Attach等非时延要求高的 NAS请求， 否则可能 不触发新的 MME2选择过程。
另外， 本发明实施例还可以通过下述过程避免重选择的现象发生， 如在 UE接入 RAN时， 除了将 SAE***的临时移动用户标识上 以外， 还将 old TAI 也报给 RAN节点， 当 RAN节点发现该 TAI不属于本 Pool时， 即可直接进行新的 核心网节点的选择。 即在 UE接入 RAN时发送的 Initial Direct Transfer消息中的 Intra Domain NAS Node Selector还包括 TAI。
此外， 本发明实施例还可以根据实际网络情况进行 SAE***的临时移动用 户标识中的各 id配置。 比如： 如果设置每省一个 Pool, 每个 MME的容量为 100 万用户， 每省中的 Pool最多有 6个相邻 Pool, 每省最多 1亿用户的话。 SAE*** 的临时移动用户标识可设置为： UE temporary id 为 21bit (每 MME最大供 200 万用户） , Pool-id为 3bit (可重复使用， 最大供 8个相邻 Pool ) , 每个 Pool中需 要 100个 MME (—亿用户 /100万） , MME-id需 7bit (最大供 128个 MME ) , 假 设 SAE***的临时移动用户标识固定为 36bit ( SAE的 SAE***的临时移动用户 标识可能会扩展，假设 SAE***的临时移动用户标识组成为 SAE***的临时移 动用户标识 = Pool-id + MME-id + UE temporary id + restart-id ) , 则可剩下 5bit 用于 restart；。
当网络情况为， 如北京网络， 北京最多 2000万用户， 每 MME的最大容量为 250万用户， 每省需要唯一的 Pool-id。 则 Pool-id为 6bit (供 64个 Pool, 每省唯一 一个也够了） , UE temporary id为 22bit (可供 400万用户） , Pool内的 MME为 8 个， MME-id为 3bit或 4bit (为方便扩展） , 这样可剩下 36-6-22-4=4bit用于 restart-id。
上述例子是以 SAE***的临时移动用户标识为固定的情况下， 各 id可根据 网络情况进行灵活配置的例子。
此外，本发明实施例还提供当满足重分配的预定条件时，该演进网络为该 用户设备重新分配 SAE***的临时移动用户标识。
请参阅图 7，为本发明实施例该 SAE***的临时移动用户标识重新分配的第 一应用实例的流程图。
由于 SAE***的临时移动用户标识在大范围内是唯一的， SAE***的临时 移动用户标识可能在较长时间内都可以不发生改变， 但出于私密性的考虑， SAE***的临时移动用户标识应该定期发生变化， 网络可进行 SAE***的临时 移动用户标识 reallocation ( SAE***的临时移动用户标识 重新分配） , 该重 分配的预定条件可以是, reallocation可通过在周期性位置更新 n次后，或换 MME 后， 或换 n次 MME后触发等。 如 MME设计一个 counter (计数器） , 当 UE每接 入网络或周期性更新， counter加 1， 当到达门限 n时， SAE***的临时移动用户 标识重新分配， 并发送给 UE, 同时 counter复位。 其具体的实现过程为：
步骤 701 : 当 UE接入 MME, 即向 MME发送位置更新请求；
步骤 702: MME接收位置更新请求， 通过计数器记录位置更新的次数， 当 计数器记录的次数达到一定的门限时， 执行步骤 703 步骤 703: MME为该用户设备分配新的 SAE***的临时移动用户标识， 并 将计数器复位；
步骤 704: 同时， MME向该用户反馈位置更新接受消息， 该消息中携带新 的 S AE***的临时移动用户标识。
也就是说 , 当 MME的 Counter到达门限（比如 counter每 UE接入递增或每 UE 改变 MME递增或每 UE发起 TAU递增） , 则 MME分配新的 SAE***的临时移动 用户标识， 并发送给 UE, 之后 Counter复位。
还请参阅图 8，为本发明实施例该 SAE***的临时移动用户标识重新分配的 第二应用实例的流程图。 此外， 网络还可以根据 timer (计时器） ， 当 timer到 期， 则进行 SAE***的临时移动用户标识的重新分配， 当 timer到期， 如果 UE 处于 idle状态， 可以在 UE下次接入网络时进行 SAE***的临时移动用户标识的 分配， 或者网络对 UE进行寻呼， 来进行 SAE***的临时移动用户标识的 reallocation 具体的实现过程为：
步骤 801： 当 MME给 UE分配 SAE***的临时移动用户标识后将开启定时器 Timer, 当 timer达到预定的期限时； 执行步骤 802;
步骤 802: MME向 UE发送调度（Paging )信息， 即对 UE进行寻呼； 步骤 803: UE向 MME发送服务请求消息， 该消息中携带请求新的 SAE*** 的临时移动用户标识；
步骤 804: MME为该用户分配新的 SAE***的临时移动用户标识， 并对计 时器复位；
步骤 805: MME向该 UE发送 SAE***的临时移动用户标识分配消息 （ SAE ***的临时移动用户标识 Reallocation ) , 该消息中包括 new SAE***的临时 移动用户标识；
步骤 806: UE向 MME反馈 SAE***的临时移动用户标识 Reallocation接受 消息。
在图 8中，当 MME给 UE分配 SAE***的临时移动用户标识后将开启定时器 Timer, 且当 Timer到期后， MME应该给 UE分配新的 SAE***的临时移动用户 标识并发给 UE, 上例中是 Timer到期后， 如果 UE处于 Idle状态， 则 MME对 UE 进行寻呼， 在 UE接入后给 UE分配新的 SAE***的临时移动用户标识。 如果 UE 处于 Active状态， 可直接执行步骤 805和 806， 将分配新的 SAE***的临时移动 用户标识发送给 UE, 不必寻呼 UE。 也可以是 Timer到期后， UE下次接入时分 配新的 SAE***的临时移动用户标识给 UE, 过程类似图 8， 但没有寻呼过程。
再请参阅图 9 , 为本发明实施例该 SAE***的临时移动用户标识重新分配 的第三应用实例的流程图。由 UE侧来维护类似上面的 Timer和 Counter,在 Timer 或 Counter到期后， UE主动发起 SAE***的临时移动用户标识 Reallocation的流 程， 具体过程包括：
在图 9中， UE自身维护 SAE***的临时移动用户标识是否应该分配， 如 UE设置 Timer到期， 则发起 TAU请求， 其中包含要求网络重新分配 SAE***的 临时移动用户标识的请求。 网络收到 TAU请求后， 为该 UE分配新的 SAE*** 的临时移动用户标识并发送给 UE。 具体的实现过程为：
步骤 901 : 当用户设备的时间到期后； 向 MME发送 TAU请求， 该 TAU请 求中包括重新分配 SAE***的临时移动用户标识的请求（即步骤 902 ) ；
步骤 903: MME为该用户分配新的 SAE***的临时移动用户标识， 并通 过位置更新接受消息反馈给该用户设备 (即步骤 904 ) ；
步骤 905: 该 UE向 MME发送位置更新完成消息。
此外， 关于接入网识别 SAE ***的临时移动用户标识的方法， 在现有 UMTS中， 在 UE接入 RAN时发送的 RRC消息中携带 Initial Direct Transfer, 在该 Initial Direct Transfer包括一个 Intra Domain NAS Node Selector字段， 其 中可以包括 P-TMSI。 此外， 在 Initial Direct Transfer消息中， 还可以携带 NAS 字段， NAS为 UE直接到核心网的消息， 如 RAU或 Attach Request, 在 RAU 或 Attach Request中也可以包括 P-TMSI, 因此 P-TMSI在 Initial Direct Transfer 中存在 2个。 这样对无线空口而言， 资源浪费较多。 即在现有 UMTS中， 在 UE接入 RAN时发送的无线资源控制（ RRC, Radio Resource Control)消息中 携带 Initial Direct Transfer, 该 Initial Direct Transfer包括一个域内非接入层节 点选择（ Intra Domain NAS Node Selector )字段， 其中可以包括 P-TMSI。 此 夕卜 , 在 Initial Direct Transfer消息中 , 还可以包括 NAS字段， NAS为 UE直接 到核心网的消息 , 如 RAU或 Attach Request, 在 RAU或 Attach Request中也 可以包括 P-TMSI, 因此 P-TMSI在 Initial Direct Transfer中存在 2个。 这样对 无线空口而言， 资源浪费较多。
对于目前浪费资源较多的情况，本发明提供两种实施例来解决这个问题， 具体包括：
本发明实施例提供一种 SAE***的临时移动用户标识传递方法， 该方法 适用于用户设备向核心网传递 SAE***的临时移动用户标识，其流程图详见图 10， 该方法包括：
步骤 100: 在用户设备接入演进网络时， 向演进网络中的演进无线接入网 络实体发送携带初始直传消息的无线资源控制请求消息， 该请求消息中包括
SAE***的临时移动用户标识和非接入层消息， 该非接入层消息中不携带 SAE ***的临时移动用户标识；
即在用户设备接入演进无线接入网络实体时， 向演进无线接入网络实体 发送携带初始直传消息的无线资源控制请求消息，在该消息中包括携带 SAE系 统的临时移动用户标识和非接入层消息 NAS , 而在该 NAS消息中 （如 Attach,
TAU请求等）则不需要再携带 SAE***的临时移动用户标识了， 这是因为核心 网通过初始用户设备消息中携带的 SAE***的临时移动用户标识获取该 SAE ***的临时移动用户标识信息，而不需要通过 NAS消息中携带的 S-TMS来获取 该 S AE***的临时移动用户标识信息。
步骤 101 : 该演进无线接入网络实体通过接口 S1与移动性管理实体建立信 令连接时，通过接口 S 1将该 SAE***的临时移动用户标识放入初始用户设备消 息中，并通过初始用户设备消息将 SAE***的临时移动用户标识提供给核心网 节点。
即核心网节点通过初始用户设备消息中携带的 SAE***的临时移动用户 标识获取该 SAE***的临时移动用户标识信息，而不是通过 NAS消息中携带的 SAE***的临时移动用户标识获取该 SAE***的临时移动用户标识信息， 从而 节省了在 NAS中再次携带 SAE***的临时移动用户标识的开销 ,降低了空口及 S1接口的资源开销。
本实施例也就是说， 在 SAE***中， SAE***的临时移动用户标识包含 在 Initial Direct Transfer的 RRC部分，如 Intra Domain NAS Node Selector字段内， RAN节点在进一步连接 SI -MME连接时， 将 SAE***的临时移动用户标识放入 建立 Sl-AP的消息中。 即初始 NAS消息本来是在 RRC和 S1-AP分别承载的， 原 来的 P-TMSI是通过 NAS由 UE直接提供给核心网节点，而在本实施例中，该 SAE ***的临时移动用户标识只需要提供一次， 即不在 NAS消息中携带， 只在 RRC 中携带即可， 由 UE提供给 RAN, RAN再通过 Sl-AP初始建立消息提供给核心 网节点。
本发明实施例再提供一种 SAE***的临时移动用户标识的分配方法， 该 方法的流程图如图 11所示， 该方法包括：
步骤 110: 计算分配的 SAE***的临时移动用户标识， 其中， 该 SAE系 统的临时移动用户标识满足： ^居该 SAE***的临时移动用户标识计算出来 的寻呼组与 据国际移动用户标识计算出来的寻呼组一致；
步骤 111 : 当寻呼用户设备时，将携带 SAE***的临时移动用户标识的寻 呼消息发送到演进无线接入网络实体，而该寻呼消息中不携带国际移动用户标 识；
步骤 112:该演进无线接入网络实体根据 SAE***的临时移动用户标识计 算用户设备的寻呼组， 并对所述用户设备进行寻呼。
也就是说， 本实施例要求 MME为用户设备分配的 SAE***的临时移动 用户标识通过某种算法使得根据 SAE***的临时移动用户标识计算出来的寻 呼组与 IMSI计算出来的寻呼组一致， 如果二者一致， 则在下发寻呼中， MME只需要携带 SAE***的临时移动用户标识而不必再携带 IMSI到 RAN 侧， RAN根据 SAE***的临时移动用户标识计算 UE的寻呼组并对 UE进行 寻呼。
在该方法中， MME分配 SAE***的临时移动用户标识要通过某种算法使 得根据 SAE***的临时移动用户标识计算出来的寻呼组与根据 IMSI计算出来 的寻呼组一致， 这样在使用 DRX (非连续接收）技术时，在下发寻呼中， MME 只需要携带 SAE***的临时移动用户标识而不必再携带 IMSI到 RAN侧 , RAN 才艮据 SAE***的临时移动用户标识计算出来的寻呼组与 IMSI—致，因此不必将 IMSI下发到 RAN, 节省了无线空口资源， 而且也避免了 IMSI在 RAN侧暴露。
其中， 该计算寻呼组具体算法不做限制， 例如通过取模运算， 假如网络 需要 12个寻呼组，根据（IMSI mod 12 ) +1来算出每个 IMSI的寻呼组，即将 IMSI 作为数字， 除以 12, 获取其余数（从 0到 11 ) , 余数为 0表示寻呼组 1， 余数为 1 表示寻呼组 2, 依次类推。 本实施例只是举一个简单算法， 对具体算法不做限 制。 在本特定算法基础上， 只要保证网络生成的 SAE***的临时移动用户标识 满足根据该算法得出的寻呼组与 IMSI算出的寻呼组一致即可。
本实施例具体如图 12所示， 具体包括：
1、 用户设备 UE向 ENB发送 RRC消息的初始直传（Initial DT ) 消息， 该 初始直传消息中携带 NAS消息为 Attach Request, 在该 NAS消息中为了节省资 源， 可以不携带 SAE***的临时移动用户标识（简称 SAE-TMSI )信息， 而只 在 RRC消息中携带 SAE***的临时移动用户标识；
2、 当 ENB收到该消息后， 根据 RRC中的 SAE***的临时移动用户标识进 行 MME的选定或重新选择， 并在确定新的 MME后， ENB再将 NAS消息及 SAE ***的临时移动用户标识携带发送给新 MME的 S1-AP消息的初始 UE消息中； 这样新 MME获取了 NAS消息及 SAE***的临时移动用户标识。也就是说 , ENB 在接收到 UE发送的 Initial DT后 , 向新 MME发送初始 UE消息 , 该消息中包括： SAE***的临时移动用户标识和附着请求；
3、 为可选步骤， 新 MME可能还向旧的 MME发送标识请求， 该标识请求 中包括 SAE***的临时移动用户标识（可以不必携带 old TAI了 ) , 如图 12中虚 线所示；
4、 该旧的 MME向新的 MME反馈标识响应， 如图 12中虚线所示。
本实施例中， 对于附着的其它实现过程， 在此不再赘述。
此外， 本发明实施例还提供一种根据 SAE***的临时移动用户标识收发 信息的方法， 该方法的流程图如图 13所示。 在该方法中新移动性管理实体向 旧移动性管理实体发送标识请求或上下文请求中， 不必携带旧的区域标识，具 体包括：
步骤 131 : 如果 SAE***的临时移动用户标识在移动性管理实体内唯一， 则在附着流程中， 新移动性管理实体向旧移动性管理实体发送携带 SAE*** 的临时移动用户标识的标识请求消息或上下文请求消息，该请求消息中不携带 旧的区域标识； 或者， 在移动性管理实体的位置更新过程中， 新移动性管理实 体向旧移动性管理实体获取用户设备上下文的请求消息中 ,该请求消息中包括 SAE***的临时移动用户标识， 不携带旧的位置标识信息；
步骤 132: 当接收到该消息的移动性管理实体不是该用户设备的旧移动性 管理实体时， 该移动性管理实体 据该消息中的 SAE***的临时移动用户标 识解析到旧移动性管理实体的地址。
本发明实施例还提供一种演进网络中识别用户设备的装置， 其结构示意 图如图 14所示。 该装置包括： 接收单元 141和临时识别单元 142。 其中， 该接收 单元 141 , 用于接收为接入演进网络的用户设备分配***架构演进的临时移动 用户标识 SAE***的临时移动用户标识， 该 SAE***的临时移动用户标识至少 包括： 资源池标识、移动性管理实体标识和用户设备的临时标识； 该临时识别 单元 142， 用于利用该 SAE***的临时移动用户标识临时识别接入演进网络内 的用户设备。
其中， 该临时识别单元 142包括： 判断子单元 1421、 选择子单元 1422和 重新选择子单元 1423 (图中虚线所示）。 该判断子单元 1421 , 用于判断该用户 设备的接入请求携带 SAE***的临时移动用户标识中的资源池标识和移动性 管理实体标识是否与当前的资源池中配置相同，并将是的判断结果发送给选择 子单元 1422，将否的判断结果发送重新选择子单元 1423;该选择子单元 1422， 用于根据该是的判断结果为该用户设备选择对应的移动性管理实体；该重新选 择子单元 1423 , 用于根据该否则的判断结果， 或者负载平衡原则以及 SAE系 统的临时移动用户标识中的资源池标识在公共陆地移动网中是否唯一，重新为 该用户设备选择新的移动性管理实体。
该装置可以集成在演进无线接入网络实体中。
本发明实施例还提供一种演进网络中的移动性管理实体，其结构示意图详 见图 15， 该装置包括： 临时标识分配单元 151和 /或临时标识重分配单元 152。 其中该临时标识分配单元 151， 用于为接入演进网络的用户设备分配***架构 演进的临时移动用户标识 SAE***的临时移动用户标识， 该 SAE***的临时 移动用户标识至少包括： 资源池标识、移动性管理实体标识和用户设备的临时 标识。 临时标识重分配单元 152， 用于为满足重分配的预定条件的用户设备重 新分配 SAE***的临时移动用户标识。 其中， 该临时标识重分配单元 152至 少包括一种： 预定门限重分配子单元 1521和 /或定时器重分配子单元 1522和 / 或位置更新重分配子单元 1523和 /或重分配子单元 1524。该预定门限重分配子 单元 1521， 用于在移动性管理实体的更新计数达到预定门限时， 为该用户设 备重新分配 SAE***的临时移动用户标识； 该定时器重分配子单元 1522, 用 于在移动性管理实体分配 SAE***的临时移动用户标识后开启的定时器到期 后， 为该用户设备重新分配 SAE***的临时移动用户标识； 该位置更新重分 配子单元 1523 , 用于接收到用户设备设置的定时器到期， 发送的带有 SAE系 统的临时移动用户标识的位置更新请求时， 为该用户设备重新分配 SAE*** 的临时移动用户标识。 该重分配子单元 1524， 用于接收到用户设备记录更新 的位置区域或单位时间内的计数达到预定门限时， 发起带有 SAE***的临时 移动用户标识的位置更新请求或 SAE***的临时移动用户标识重分配请求， 并为该用户设备重新分配 SAE***的临时移动用户标识。
优选的， 本实施例中的临时标识分配单元 151可以与图 14中的接收单元 141相连， 而本实施例中的预定门限重分配子单元 1521、定时器重分配子单元 1522、 位置更新重分配子单元 1523和重分配子单元 1524可以与图 14中的选 择子单元 142或重新选择子单元 143分别相连。
由此可见，本发明实施例通过在 SAE***的临时移动用户标识中设置不同 的标识， 该 SAE***的临时移动用户标识结合 SAE网络的特点， 力口入 Pool-id。 由于 既念采用 Multi-TA Registration的方式 ,每个 UE可分配多个 TA , 为保证 不出现 TA内有相同的 SAE***的临时移动用户标识，则需要 SAE***的临时移 动用户标识在 Pool内唯一。 且具有 Overlapping的相邻 Pool也不应该出现相同的 SAE***的临时移动用户标识， 因此通过 Pool-id进行 Pool的区分可保证 SAE系 统的临时移动用户标识的在 UE的注册区域唯一性。 Pool-id可在整个 PLMN内唯 ―, 这样 SAE***的临时移动用户标识在整个 PLMN都是唯一的， 这样的优势 在于新的 MME可通过 UE的 SAE***的临时移动用户标识即可找到旧的 MME 来获取 UE上下文， 不需要结合 TAI了， 因此 UE没有必要携带 TAI了。 当然， Pool-id也可在 PLMN内不唯一， 在无 Overlapping的 Pool间可重复， 但尽量设置 相邻的 Pool间不重复， 以防止无法触发新的 MME选择；该方式可节省 SAE*** 的临时移动用户标识的 bit位 , 但新的 MME需要结合 TAI来寻找旧的 MME。
由上述技术方案可知， 本发明实施例通过在 SAE***的临时移动用户标 识中设置不同的标识， 即包括到不限于资源池标识、移动性管理实体标识和用 户设备的临时标识， 当用户设备接入演进网络时，为该用户设备分配所述 SAE ***的临时移动用户标识， 并利用所述 SAE***的临时移动用户标识临时识 别接入演进网络内的用户设备。 本实施例由于在 SAE***的临时移动用户标 识中配置了资源池标识， 当用户设备接入演进网络中，加快该用户设备的更新 与处理过程， 同时也简化了运营商对网络资源的配置，从而也提高了用户的满 意度。 此外， 本发明实施例还可以在发送的所述消息中只携带 SAE***的临 时移动用户标识， 而不必携带旧的区域标识， 从而节省了传输资源。
以上该仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技 术人员来说， 在不脱离本发明原理的前提下， 还可以作出若干改进和润饰， 这 些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种演进网络中识别用户设备的方法， 其特征在于， 包括步骤： 接收为接入演进网络的用户设备分配的***架构演进网络 SAE***的临 时移动用户标识， 所述 SAE***的临时移动用户标识至少包括： 资源池标识、 移动性管理实体标识和用户设备的临时标识；
利用所述 SAE ***的临时移动用户标识临时识别演进网络内的用户设 备。
2、 根据权利要求 1所述演进网络中识别用户设备的方法， 其特征在于， 所述利用 SAE***的临时移动用户标识临时识别接入演进网络的用户设备的 过程为：
当所述用户设备发起接入时， 演进网络根据所述用户设备携带 SAE*** 的临时移动用户标识中的资源池标识和移动性管理实体标识为该用户设备选 择移动性管理实体。
3、 根据权利要求 2所述演进网络中识别用户设备的方法， 其特征在于， 所述资源池标识在公共陆地移动网中唯一； 或无重叠的资源池中重复； 所述移 动性管理实体标识在该资源池内唯一；所述用户设备的临时标识在移动性管理 实体内唯一。
4、 根据权利要求 2所述演进网络中识别用户设备的方法， 其特征在于， 所述选择移动性管理实体的过程为：
当用户设备接入演进网络中的演进无线接入网络实体时，从所述演进无线 接入网络实体对应的资源池中， 根据所述 SAE***的临时移动用户标识中的 资源池标识、 移动性管理实体标识， 选择对应的移动性管理实体；
若在所述演进无线接入网络实体对应的资源池中， 没有与所述 SAE*** 的临时移动用户标识中的资源池标识、移动性管理实体标识所对应的移动性管 理实体，或者当所述演进无线接入网络实体发现所述用户设备旧的位置区域标 识不属于所述资源池时 , 则为所述用户设备选择新的移动性管理实体。
5、 根据权利要求 1或 2所述演进网络中识别用户设备的方法， 其特征在 于， 所述资源池标识中携带公共陆地移动网标识 PLMN-id。
6、 根据权利要求 4所述演进网络中识别用户设备的方法， 其特征在于， 当 SAE***的临时移动用户标识中的资源池标识在公共陆地移动网唯一时， 所述用户设备接入时不携带旧的跟踪区标识。
7、 根据权利要求 4所述演进网络中识别用户设备的方法， 其特征在于， 所述选择对应的移动性管理实体之后进一步包括：
所述演进无线接入网络实体向所述对应的移动性管理实体转发用户设备 发送的初始用户设备信息；
当所述演进无线接入网络实体接收到所述移动性管理实体反馈的重路由 命令时，重新选择新的移动性管理实体或根据所述重路由命令中携带的信息选 择新的移动性管理实体。
8、根据权利要求 7所述演进网络中识别用户设备的方法，其特征在于， 当 满足以下条件之一， 所述对应的移动性管理实体发送重路由命令：
所述对应的移动性管理实体根据初始用户设备信息中携带的旧的位置标 识或所述旧的位置标识结合 SAE***的临时移动用户标识， 确定自身不是所 述用户设备的原移动性管理实体； 和
所述对应的移动性管理实体确定本身负载过重或接入请求为非时延敏感 性请求。
9、 根据权利要求 4或 7所述演进网络中识别用户设备的方法， 其特征在 于， 所述选择新的移动性管理实体之后进一步包括：
新移动性管理实体获取所述用户设备原移动管理实体的地址信息； 根据所述地址信息，向原移动管理实体获取所述用户设备的上下文或标识 信息。
10、 根据权利要求 9所述演进网络中识别用户设备的方法， 其特征在于， 获取所述用户设备原移动管理实体的地址信息的过程包括：
当 SAE***的临时移动用户标识中的资源池标识在公共陆地移动网唯一 时，在用户设备接入新移动性管理实体，新移动性管理实体从该用户设备中携 带的 SAE***的临时移动用户标识中的资源池标识和移动性管理实体标识获 取原移动性管理实体的地址信息； 或者
当 SAE***的临时移动用户标识中的资源池标识在公共陆地移动网中为 多个时， 则利用该用户设备的旧的位置区域标识或该旧的位置区域标识结合 SAE***的临时移动用户标识， 来获取原移动性管理实体的地址信息。
11、 根据权利要求 1所述演进网络中识别用户设备的方法， 其特征在于， 所述方法还包括：
当满足重分配的预定条件时， 所述演进网络为该用户设备重新分配 SAE ***的临时移动用户标识。
12、根据权利要求 11所述演进网络中识别用户设备的方法， 其特征在于， 所述满足重分配的预定条件包括下述任一种：
移动性管理实体的更换计数达到预定门限；
移动性管理实体分配 SAE ***的临时移动用户标识后开启的定时器到 期；
用户设备记录更新的位置区域 TA或单位时间内的计数达到预定门限， 向 移动性管理实体发起带有 SAE ***的临时移动用户标识的位置更新请求或 SAE***的临时移动用户标识重分配请求；
用户设备设置的定时器到期后， 向移动性管理实体发起带有 SAE***的 临时移动用户标识的位置更新请求或 SAE***的临时移动用户标识重分配请 求。
13、 根据权利要求 1所述演进网络中识别用户设备的方法， 其特征在于， 所述 SAE***的临时移动用户标识还包括： 重启动标识。
14、 根据权利要求 1或 13所述演进网络中识别用户设备的方法， 其特征 在于， 所述 SAE***的临时移动用户标识还包括： 区分通信***类型的标识。
15、 根据权利要求 1、 11或 13任一项所述演进网络中识别用户设备的方 法， 其特征在于， 所述 SAE***的临时移动用户标识中标识的长度根据实际 网络情况进行配置。
16、 一种演进网络中识别用户设备的装置， 其特征在于， 包括：
接收单元，用于接收为接入演进网络的用户设备分配的***架构演进的临 时移动用户标识 SAE***的临时移动用户标识， 所述 SAE***的临时移动用 户标识至少包括： 资源池标识、 移动性管理实体标识和用户设备的临时标识； 临时识别单元， 用于利用所述 SAE***的临时移动用户标识临时识别接 入演进网络内的用户设备。
17、根据权利要求 16所述演进网络中识别用户设备的装置，其特征在于， 所述临时识别单元包括： 判断子单元、 选择子单元和重新选择子单元， 其中， 所述判断子单元， 用于判断所述接入请求中 SAE***的临时移动用户标 识的资源池标识和移动性管理实体标识是否与当前的资源池中配置相同，并将 是的判断结果发送给选择子单元， 将否的判断结果发送给重新选择子单元； 所述选择子单元，用于根据所述是的判断结果为该用户设备选择对应的移 动性管理实体；
所述重新选择子单元， 用于根据所述否的判断结果， 重新为该用户设备选 择新的移动性管理实体。
18、根据权利要求 16所述演进网络中识别用户设备的装置，其特征在于， 所述装置集成在演进无线接入网络实体中。
19、 一种演进网络中的移动性管理实体， 其特征在于， 包括：
临时标识分配单元，用于为接入演进网络的用户设备分配***架构演进网 络 SAE***的临时移动用户标识， 所述 SAE***的临时移动用户标识至少包 括： 资源池标识、 移动性管理实体标识和用户设备的临时标识。
20、 根据权利要求 19所述演进网络中的移动性管理实体， 其特征在于， 所述移动性管理实体还包括：
临时标识重分配单元，用于为满足重分配的预定条件的用户设备重新分配 SAE***的临时移动用户标识。
21、 根据权利要求 20所述演进网络中的移动性管理实体， 其特征在于， 所述临时标识重分配单元至少包括下述一种：
预定门限重分配子单元，用于在移动性管理实体的更新计数达到预定门限 时， 为该用户设备重新分配 SAE***的临时移动用户标识；
定时器重分配子单元， 用于在移动性管理实体分配 SAE***的临时移动 用户标识后开启的定时器到期后， 为该用户设备重新分配 SAE***的临时移 动用户标识；
位置更新重分配子单元， 用于接收到用户设备设置的定时器到期，发送的 带有 SAE***的临时移动用户标识的位置更新请求时， 为该用户设备重新分 配 SAE***的临时移动用户标识； 重分配子单元，用于接收到用户设备记录更新的位置区域或单位时间内的 计数达到预定门限时， 发起带有 SAE***的临时移动用户标识的位置更新请 求或带有 SAE***的临时移动用户标识的重分配请求， 并为该用户设备重新 分配 SAE***的临时移动用户标识。
22、 一种 SAE***的临时移动用户标识传递方法， 适用于用户设备向核 心网传递 SAE***的临时移动用户标识， 其特征在于， 包括步骤：
在用户设备接入演进网络时， 向演进网络中的演进无线接入网络实体发 送携带初始直传消息的无线资源控制请求消息，该请求消息中包括 SAE***的 临时移动用户标识和非接入层消息，所述非接入层消息中不携带 SAE***的临 时移动用户标识；
所述演进无线接入网络实体通过接口 S1与移动性管理实体建立信令连接 时， 通过接口 S1将所述 SAE***的临时移动用户标识放入初始用户设备消息 中，并通过初始用户设备消息将 SAE***的临时移动用户标识提供给核心网节 点。
23、 一种 SAE***的临时移动用户标识的分配方法， 其特征在于， 包括 步骤：
计算分配的 SAE***的临时移动用户标识， 其中， 所述 SAE***的临时 移动用户标识满足： 根据所述 SAE***的临时移动用户标识计算的寻呼组与 才艮据国际移动用户标识计算的寻呼组一致；
当寻呼用户设备时， 将携带 SAE***的临时移动用户标识的寻呼消息发 送到演进无线接入网， 所述寻呼消息中不携带国际移动用户标识；
所述演进无线接入网络实体根据 SAE***的临时移动用户标识计算用户 设备的寻呼组， 并对所述用户设备进行寻呼。
24、 一种根据 SAE***的临时移动用户标识收发信息的方法， 其特征在 于， 包括步骤：
若 SAE***的临时移动用户标识在移动性管理实体内唯一， 则在附着流 程中， 新移动性管理实体向旧移动性管理实体发送携带 SAE***的临时移动 用户标识的标识请求消息或上下文请求消息，所述请求消息中不携带旧的区域 标识； 或者， 在移动性管理实体的位置更新过程中， 新移动性管理实体向旧移 动性管理实体获取用户设备上下文的请求消息， 所述请求消息中包括 SAE系 统的临时移动用户标识， 不携带旧的位置标识信息；
当接收到所述消息的移动性管理实体不是该用户设备的旧移动性管理实 体时， 所述移动性管理实体根据所述消息中的 SAE***的临时移动用户标识 解析到真正的旧移动性管理实体的地址。
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