WO2009152773A1 - 接入、获取用户设备上下文及用户设备标识的方法和装置 - Google Patents
接入、获取用户设备上下文及用户设备标识的方法和装置 Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
-
- 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
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- 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
- H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
-
- 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
- H04W8/06—Registration at serving network Location Register, VLR or user mobility server
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- 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
- H04W8/10—Mobility data transfer between location register and external networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/005—Data network PoA devices
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for accessing and acquiring a user equipment context and a user equipment identifier.
- the communication network generally consists of a radio access network (RAN) and a core network (CN, Core Network). Different communication networks use different radio access technologies (RAT, Radio Access Technology) to enter the CN, that is, different.
- RAT Radio Access Technology
- the communication network has different RANs.
- the RAN of the 3G communication network is called a Universal Terrestrial Radio Access Network (UTRAN)
- UTRAN Universal Terrestrial Radio Access Network
- E-UTRAN Universal Terrestrial Radio Access Network
- the RAN consists of RAN nodes, such as the radio network controller in UTRAN ( RNC , Radio
- CN is composed of CN nodes, such as SGSN (Serving GPRS Support Node) in UTRAN, or Mobility Management Entity in E-UTRAN (MME, Mobility Management Entity) )Wait.
- MME Mobility Management Entity
- the function of the MME is to store the mobility management context (Context) of the user equipment (UE, User Equipment), and the context of the UE, such as the UE identity, mobility management status, location information, and the like.
- one RAN node can be routed to multiple CN nodes, that is, the RAN node can be routed to different CN nodes for the initially accessed UE.
- These CN nodes form a pool (pool), and the CN nodes in the pool in the 2G/3G system, such as the SGSN, use the network resource identifier (NRI, Network Resource Identifier) identifies that the CN node in the pool in the SAE system is identified by the global unique mobility management entity identifier (GUMMEI).
- NRI Network Resource Identifier
- the communication network allocates a temporary identifier to the UE.
- the 2G/3G system allocates a packet temporary user identifier (P-TMSI, Packet Temporary Mobile Subscriber Identity)/TMSI to the UE, and the SAE system
- P-TMSI Packet Temporary Mobile Subscriber Identity
- TMSI Packet Temporary Mobile Subscriber Identity
- SAE system A Global Unique Temporary Identity (GUTI) is allocated to the UE, where the GUTI includes the GUMMEI. Since the UE will move in different communication networks, when the UE switches from the original communication network to the new communication network, or when switching from the original CN node to the new CN node, the original CN needs to be searched through the temporary identification of the NRI/GUMMEI and the UE.
- P-TMSI Packet Temporary Mobile Subscriber Identity
- GUMMEI Global Unique Temporary Identity
- the node obtains the context of the UE so that it can be switched quickly. If the handover is different between different communication networks, because the RATs they use are different, when the UE accesses the new communication network from the original communication network, it also needs to map the identity of the RAT of the original communication network, that is, the identity of the old RAT to the new communication. The identity of the RAT of the network is accessed, so that it is possible to find the CN node in the original communication network, and it is possible to acquire the context of the UE. E.g:
- GUTI MCC + MNC + MME Group ID (16bit) + MMEC (8bit) + M-TMSI (32 bit);
- GUMMEI MCC + MNC + MME Group ID + MMEC
- MMEI MME Group ID + MMEC
- the 2G/3G temporary identifier needs to be mapped to the GUTI format. See Figure 11, the mobile country code (MCC in the old RAI).
- the Mobile Country Code and the Mobile Network Code are mapped to the MCC and the MNC in the GUTI, respectively, and the Location Area Code (LAC) is mapped to the mobility management entity group identifier in the GUTI ( MMEGI, Mobility Management Entity Group Identity), mapping the NRI to the Mobility Management Entity Code (MMEC) in the GUTI, mapping the RAC and other P-TMSI content to the M-TMSL in the GUTI
- MMEGI Mobility Management Entity Group Identity
- MMEC Mobility Management Entity Group Identity
- mapping the RAC and other P-TMSI content to the M-TMSL in the GUTI
- the identity of the RAT may not correspond to the CN node, that is, the new communication network may not be selected.
- the identity of the RAT is the identity of the real RAT or the identity of the mapped RAT, it is not known which RAT is used to acquire the UE context from the original CN node, and the UE context may not be obtained.
- the purpose of the embodiments of the present invention is to provide a method and apparatus for accessing and acquiring a user equipment context and a user equipment identifier, and implementing flexible use of the temporary identifier.
- An embodiment of the present invention provides a method for accessing, where the method includes:
- the network side node such as an evolved base station (eNodeB) or a preset central node, is still mapped;
- eNodeB evolved base station
- preset central node a preset central node
- the eNodeB is according to the GUMMEI, or according to the MMEGI and the MMEC, or according to the identifier of the selected Public Land Mobile Network (PLMN) (below Called PLMN-id) and MMEGI and MMEC to select the mobility management entity MME;
- PLMN Public Land Mobile Network
- the eNodeB selects an MME according to MCC, MNC and MMEC in the GUMMEI, or selects an MME according to the MMEC in the GUMMEI, or according to the selected PLMN-id and the MMEC in the GUMMEI Select MME.
- the embodiment of the invention further provides a method for accessing, the method comprising:
- the MME determines whether the GUTI carried by the UE is allocated by the SAE or is mapped;
- the MME uses the GUTI to obtain the context of the UE from the old mobility management entity (old MME);
- the MME restores the GUTI to an old routing area identifier (old RAI) and a packet temporary mobile subscriber identity P-TMSI.
- old RAI old routing area identifier
- P-TMSI packet temporary mobile subscriber identity
- the old RAI and the Temporary Logical Link Identity are restored, and the context of the UE is taken from the old serving general packet radio service support node (old SGSN) according to the restored identifier.
- the embodiment of the invention further provides a method for accessing, the method comprising:
- the MME maps the GUTI carried by the UE into an old RAI and a P-TMSI, or a TLLI and a packet temporary mobile subscriber identity signature (P-TMSI Signature);
- the MME obtains the context of the UE from the old MME or the old SGSN by using the mapped old RAI and P-TMSI, or TLLI and P-TMSI Signature;
- the old MME restores the old RAI and P-TMSI, or old RAI and TLLI and P-TMSI Signature to GUTI, and returns the UE's context to the MME according to the restored GUTI.
- the embodiment of the invention further provides a method for accessing, the method comprising:
- the MME uses the GUTI to obtain the context of the UE from the old mobility management entity old MME;
- the MME restores the GUTI to an old routing area identifier old RAI and a packet temporary mobile subscriber identity P-TMSI, or to a logical link temporary identity TLLI;
- the restored identifier acquires the context of the UE from the old SGSN;
- the MME obtains the context of the UE from the old SGSN by using the GUTI; the old SGSN restores the GU ⁇ to the old RAI and P-TMSI, or to the old RAI/TLLI identifier. And returning to the MME after finding the context of the UE by using the identifier.
- the embodiment of the invention further provides a method for accessing, the method comprising:
- the SGSN searches for the corresponding old entity address according to the old RAI and the P-TMSI carried by the UE, or the TLLI, and acquires the context of the UE from the old entity.
- the old MME restores the old RAI and P-TMSI, or restores the TLLI and the P-TMSI Signature to GUTI, and returns the context of the found UE to the SGSN.
- the embodiment of the invention further provides a method for accessing, the method comprising: When the UE accesses the 2G/3G network, the SGSN is configured according to the old RAI and the P-TMSI carried by the UE, or according to whether the TLLI and the P-TMSI Signature carried by the UE are 2G/3G allocated or mapped, and correspondingly Whether the old entity is old SGSN or old MME;
- the old entity is an old MME
- the SGSN is according to the old RAI and P-TMSI
- TLLI/ P-TMSI Signature restores the GUTI, and obtains the context of the UE from the old MME by using the GUTI; the old MME will find the UE context according to the GUTI and return to the SGSN;
- the old entity is an old SGSN, and the SGSN uses the old RAI and P-TMSI, or, TLLI
- the context of the UE is obtained from the old SGSN.
- the embodiment of the present invention further provides a method for acquiring a UE context of a user equipment, where the method includes: the temporary identifier indicated by the temporary identifier (TIN, Temporary Identity used in Next update) is the same as the additional temporary identifier.
- TIN Temporary Identity used in Next update
- the user equipment UE only carries the temporary identifier access indicated by the TIN;
- the access node finds the UE context by using the temporary identifier indicated by the TIN carried by the UE.
- the embodiment of the present invention further provides a method for acquiring a UE context of a user equipment, where the method includes: a Tracking Area Update (TAU) or a Routing Area Update (RAU) in a handover process, where the UE only needs to The TMSI carrying the RAT system does not carry any TMSI, and the UE finds the UE context through the established connection established by the target side.
- TAU Tracking Area Update
- RAU Routing Area Update
- An embodiment of the present invention further provides a method for acquiring a UE identifier, where the method includes:
- the temporary identifier is carried, and the access entity searches for the corresponding node by using the temporary identifier to obtain the international mobile subscriber identity of the UE (IMSI, International)
- IMSI international mobile subscriber identity
- the temporary identifier of the another RAT is carried, and the access entity searches for the corresponding node by using the temporary identifier of the another RAT, and acquires the UE. IMSI and security parameters.
- the embodiment of the invention further provides a network side device, which includes the following modules,
- An identifier attribute obtaining module configured to acquire an attribute of a temporary identifier of a UE currently accessing the network side, The attribute of the temporary identifier of the UE is whether the UE identifier is allocated or mapped by the network side; the network resource node allocation module allocates a network resource node to the UE according to the attribute of the temporary identifier of the UE.
- the UE When the user equipment UE accesses the system architecture evolution network SAE, the UE carries the temporary mobile subscriber identity (S-TMSI) of the SAE network in the RRC (Radio Resource Control) connection setup request message sent to the evolved base station eNodeB. MMEC and M-TMSI are formed. If the UE carries the 2G/3G identity to access the SAE/LTE system, the S-TMSI is actually mapped by the NRI and the RAC and part of the P-TMSI), and the RRC connection setup to the eNodeB is completed. The message does not carry the global unique mobility management entity identifier GUMMEI;
- GUMMEI global unique mobility management entity identifier
- the eNodeB selects the corresponding mobility management entity MME according to the received S-TMSI. If there is no corresponding MME, the eNodeB selects a new MME.
- the temporary identifiers carried by the UE when accessing the network side are differently allocated to the network side or mapped, so that different access methods are used for different temporary identifiers to implement flexible application of the temporary identifier.
- FIG. 1 is a schematic flowchart of an access method according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic flowchart of an access method according to Embodiment 3 of the present invention.
- Embodiment 4 of the present invention is a schematic flowchart of an access method in Embodiment 4 of the present invention.
- Embodiment 6 is a schematic flowchart of an access method in Embodiment 6 of the present invention.
- Embodiment 7 of the present invention is a schematic flowchart of an access method in Embodiment 7 of the present invention.
- FIG. 7 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
- FIG. 8 is a schematic diagram of a network scenario in Embodiment 1 of the present invention.
- FIG. 9 is a flowchart of a method for a UE to access a SAE/LTE network by using a TA registered case according to Embodiment 2 of the present invention.
- FIG. 10 is a flowchart of a method for a UE to access a SAE/LTE network by using a TA not registered case according to Embodiment 2 of the present invention
- Figure 11 is a schematic diagram of mapping a 2G/3G temporary identifier to a GUTI.
- This embodiment provides a method for the LAC and the MMEGI.
- the bit in the LAC is different from the value of the corresponding bit in the MMEGI, and the LAC and the MMEGI can be distinguished.
- the first bit of the MMEGI is 1 and the first bit of the LAC is 0.
- the bit is called a flag bit for distinguishing between the MMEGI and the LAC.
- other bits can also be used as the distinguishing flag bit.
- the eNodeB uses the distinction to know whether the UE uses the real temporary identifier or the mapping.
- Temporary identity access For example, the eNodeB acquires the temporary identifier (such as GUMMEI, S-TMSI or GUTI) assigned by the SAE, or uses the mapped temporary identifier.
- the old RAI and the P-TMSI (or the old RAI and TLLI) are mapped to the GUTI. Access.
- the eNodeB selects the MME corresponding to the NRI-mapped MMEC, and the MME may not be the MME originally registered by the UE, or the MME corresponding to the NRI-mapped MMEC, and the MME is idle.
- the node is selected.
- the UE carries the GUMMEI information in the Radio Resource Control (RRC) part during the process of accessing the SAE, that is, the RRC part carried in the TAU Request message sent by the UE to the eNodeB.
- RRC Radio Resource Control
- the eNodeB checks whether the GUMMEI is the mapped GUMMEI or the GUMMEI allocated by the SAE.
- the eNodeB If it is the GUMMEI allocated by the SAE, the eNodeB according to all the information in the GUMMEI, MCC+MNC+MMEGI+MMEC, or MMEGI+MMEC, or selected PLMN + MMEGI+MMEC to determine the MME, or the eNodeB performs MME reselection because the corresponding GUMMEI cannot be found. If there is an MME corresponding to MCC+MNC+MMEGI+MMEC or MMEGI+MMEC or selected PLMN+MMEGI+MMEC, then The MME is selected, and the GUMMEI of the MME is consistent with the GUMMEI- or MMEGI+MMEC or the selected PLMN+MMEGI+MMEC carried by the UE.
- the eNodeB reselects the MME if there is no corresponding MME. If the GUMMEI is the mapped GUMMEI, the eNodeB determines the MME according to the MCC+MNC+MMEC in the GUMMEI or only according to the MMEC or the selected PLM+MMEC, specifically, if there is an MME, the MCC, the MNC of the MME, The MMEC is the same as the MCC, the MNC, and the MMEC (NRI mapping) carried by the UE, or is optional. For example, if the eNodeB configures the MMEC or the NRI corresponds to an MME, the MME is selected. Otherwise, one MME is selected.
- TIN Temporal Identity used in Next update
- the UE may not carry the mapped GUMMEI access network in the RRC part, but carry the S-TMSI in the RRC part (composed of MMEC and M-TMSI, actually by NRI and RAC). And the part of the P-TMSI is mapped to the access network, so that the eNodeB does not get the MMEGI, and the eNodeB selects the MME according to the MMEC (by the NRI mapping). Of course, if there is an MOCN, the eNodeB is divided according to the MMEC in the S-TMSI.
- the MME is selected, and the MME is also selected according to the selected PLMN-id (Selected PLMN-id) information, that is, the eNodeB selects the mobility management entity MME according to the selected PLMN-id and the MMEGI and the MMEC, specifically, if the MCC in the GUMMEI of the MME
- the MNC is the same as the selected PLMN-id carried by the UE, and the MMEC is the same as the MMEC carried by the UE, and the network side node selects the MME.
- the UE also needs to be in the non-access stratum (NAS, Non Access Stratum) part.
- NAS Non Access Stratum
- the eNodeB configures the LAC list, and when the eNodeB finds that the MMEGI belongs to the LAC list or the LAC list, selects the corresponding MME, for example, when the eNodeB finds that the GUMMEI carried by the UE is consistent with the identifier of the MME corresponding to the eNodeB, The corresponding MME is selected. Otherwise, if there is no corresponding MME, a new MME selection is performed.
- the GUMMEI identifier of the MME is actually composed of a PLMN-id+LAC+NRI mapping.
- the pool of the SAE overlaps with the pool of the 2G/3G, and the pool has an MME/SGSN node, and the pool of 2G/3G has RAI1, RAI2, RAI3, and three routing areas (RA, Routing Area).
- the UE accesses the GUTI mapped by the old RAI/P-TMSI.
- the eNodeB finds that the UE uses the mapped GUTI according to the configured information, and the RA before mapping belongs to RAI1 and RAI2.
- the eNodeB is based on MCC+MNC+MMEC (by NRI).
- the MME may be selected by the MMEC or the selected PLMN+MMEC, and the MME is selected without the MCC, the MNC, and the MMEGL MMEC. If there is no corresponding MME that meets the above description, for example, one of the configured RAIs, then one MME is reselected.
- the eNodeB can use the following methods to configure the LAC list.
- MME configures response (SI SETUP RESPONSE) message or MME configuration update via S1
- the CONFIGURATION UPDATE message is used to map the configured LAC to the GUMMEI and send it to the eNodeB.
- the eNodeB records the SI SETUP RESPONSE message or the MME CONFIGURATION UPDATE message and saves it in the configuration information, that is, the LAC list. An example will be described below.
- Pooll includes SGSN Pool and MME Pool, SGSN1, SGSN2, MME1.
- MME2 and so on are all nodes in the Pooll. MME/SGSN and SGSN3/MME3 are also present in Pooll.
- LAC1, LAC2, LAC3, and LAC4 in Figure 8 are the location area codes in the 2G/3G network, respectively.
- TA2, TA3, and TA4 are the tracking areas of the SAE network, respectively.
- the GUMMEI of the unified node SGSN3/MME3 is the PLMN-id (PLMN Identity, PLMN identity, where PLMN-id is MCC).
- the LAC can be configured to the LAC list by configuring the LAC in the SGSN3 Pool to form an LAC list. The method is as follows:
- MME3 For each LAC in the Pool, MME3 forms a GUMMEI, and the GUMMEI corresponds to PLMN-id+LAC+NRI (that is, the unified node is configured to the SGSN, that is, the NRI on the SGSN3, and the unified node is configured to the MME.
- the MMEC is equal; therefore, MME3 can form several GUMMEIs.
- the MME3 sends the list of the real GUMMEI (identification in the SAE) and the mapped GUMMEI (there are several, one GUMMEI corresponding to each LAC in the Pool1) to the eNodeB through the SI SETUP RESPONSE message or the MME CONFIGURATION UPDATE message, and the eNodeB saves The GUMMEI list (or the LAC list, because each LAC has a corresponding GUMMEI), so that when the UE registered to the SGSN3 enters the E-UTRAN area from the LAC in the Pooll, for example, LAC1 or LAC2, when accessing the eNodeB
- the eNodeB is located because the identifier carried by the UE access is GUMMEI (mapped by PLMN-id+LAC1+NRI). It can be configured by query, that is, by querying the list of the previously saved GUMMEI and the mapped GUMMEI, it is known that the GUMMEI corresponds
- a disadvantage of the above configuration method is that an MME may have a large number of mapped GUMMEIs due to the unified node and ISR requirements, because the MME will form an MMEGI correspondingly for each LAC in the pool, and even the MME will be an adjacent SGSN.
- Each LAC in the pool is also configured with an MMEGI to meet the requirements of the ISR. Therefore, in the SI SETUP RESPONSE message or the MME CONFIGURATION UPDATE message, it may be necessary to carry a large number of GUMMEL.
- the current SI SETUP RESPONSE message and the MME CONFIGURATION UPDATE message are passed below.
- the method to carry the GUMMEI list see Table 1, wherein, for convenience of description, other cells are omitted from the table.
- the complete GUMMEI list that is, the service GUMMEI list, is carried in the UPDATE message.
- the MME resends all GUMMEI lists to each eNodeB through the MME CONFIGURATION UPDATE message. Since the GUMMEI list is large and the number of eNodeBs is large, it will inevitably cause more information to be transmitted in the network, and the signaling traffic in the network is increased, that is, the network overhead is increased.
- each MME needs to send an MME CONFIGURATION UPDATE message to each eNodeB, which means that there will be 2000
- the CONFIGURATION UPDATE message is transmitted on the S1 interface, and each message contains all GUMMEI lists (both updated and not updated).
- the following configuration method may also be adopted in the embodiment of the present invention.
- the configuration message such as the SI SETUP RESPONSE message or the MME CONFIGURATION UPDATE message does not need to carry a large number of GUMMEI columns.
- the GUMMEI may be decomposed, and then the list formed by each component of the GUMMEI is sent, that is, the configuration message about the LAC list sent by the MME is sent to the eNodeB, where the configuration message about the LAC list carries the PLMN-id list,
- the MMEGI list and the MMEC list are as follows:
- the eNodeB can also be configured as a LAC list.
- the GUMMEI list is configured on the eNodeB. Since the GUMMEI is composed of PLMN-id+MMEGI+MMEC, So if GUMMEI is formed by the mapping method, the actual value of GUMMEI is PLMN-id+LAC+NRI. Generally, the values of MMEC and NRI are the same, and the values of PLMN-id are also the same. Therefore, there is a large amount of the same content in the GUMMEI list.
- the GUMMEI list can be changed to the form of PLMN-id (ie, PLMN Identity in the table) / PLMN-id list + MMEGI list + MMEC/MMEC list, where PLMN-id list refers to The PLMN-id list, the MMEGI list refers to the MMEG list, the MMEC list MMEC list;
- the values of the PLMN-id and the MMEC in the GUMMEI list are the same, and only the values of the MMEGI are different. Therefore, changing the GUMMEI list to the form of PLMN-id + MMEGI list + MMEC for transmission can save a lot of repetition.
- the transmission of the PLMN-id and the MMEC of course, in the case of supporting multiple PLMNs, the PLMN-id can also be changed to the PLMN-id list.
- the MMEC can also be changed to the MMEC list mode.
- the eNodeB After receiving the changed list, the eNodeB saves and combines the information of the PLMN-id, the MMEGI list, and the MMEC into a GUMMEI list, thereby completing the configuration of the LAC list.
- PLMN-id is currently 3 bytes
- MMEGI is 2 bytes
- the embodiment of the present invention proposes that when the LAC or the GUMMEI changes, the MME The eNodeB sends an indication message, and the indication message indicates that the eNodeB adds/modifies the GUMMEI in the LAC list.
- the MME sends an indication to the MME CONFIGURATION UPDATE message sent by the MME to the eNodeB, indicating that the LAC or the GUMMEI changes in the indication, that is, Is it to add one or several GUMMEI or modify GUMMEI or delete GUMMEI and so on.
- the modified MME CONFIGURATION UPDATE message can be three;
- the middle cylinder is called PLMN list) (0 to MME supported
- the middle cylinder is called GUMMEI list) (0 to MME supported
- the MME When the MME wants to delete a GUMMEI, it can send MME CONFIGURATION.
- the MME When the MME wants to tamper with a GUMMEI, it can send MME CONFIGURATION
- All the configuration information is centralized on a preset central node, which may be a preset eNodeB, or may be a preset MME or the like, and the central node has all MME configuration information, if an MME When the configuration information changes, the central node sends a configuration message to all eNodeBs, such as sending an SI SETUP RESPONSE message or an MME CONFIGURATION UPDATE message. Therefore, when the central node needs to send configuration information to the eNodeB, all MME configuration information will be sent.
- the GUMMEI list in the SI SETUP RESPONSE message or the MME CONFIGURATION UPDATE message is not the GUMMEI list of one MME, but the GUMME list of all MMEs.
- the SI SETUP REPONSE message needs to be modified, and the falsified SI is modified.
- the SETUP REPONSE message is shown in Table 4;
- GUMMEI (list of MMEI, indexed by 1.. ⁇ maxnoofMMEper MME GUMMEI) Pool>
- the "GUMMEI" in the table is the real GUMMEI of each MME, and each MME has only one true GUMMEI.
- the mapped GUMMEI is not considered here.
- the MME uses the real GUMMEI as a unique identifier, and all the MME information is concentrated in Together, an MME list is formed, and each MME in the MME list has some specific configuration information, such as the name of the MME, the capability, and the mapped GUMMEI list, etc., wherein the GUMMEI list may be (PLMN-id + MMEGI + The MMEC) list may also be a PLMN-id list + MMEGI list + MMEC list, or there may be no GUMMEI list of the mapping.
- the central node provides configuration information of all MMEs in the MME Pool to the eNodeB in the pool through a configuration message, so that when the LAC or the GUMMEI changes, only the central node needs to send an MME to each eNodeB.
- the CONFIGURATION UPDATE message is sufficient, and does not need to be sent to each eNodeB by each MME, thereby reducing the number of messages transmitted in the network.
- the MME Pool has 10 MMEs and 200 eNodeBs.
- the central node only needs to send a total configuration message to the 200 eNodeBs about the configuration change. The number of messages is only 200. Of course, here. Previously, the MME may also need to send its own configuration message to the central node.
- the above three methods (1) ( 2 ) ( 3 ) can be used independently or in combination.
- the combination will be more optimized, such as (1) method and (2) method combination, then, when there are 10 LACs
- the network side node is an eNodeB as an example, and the network side node may also be the central node, that is, the operation performed by the eNodeB in this embodiment may also be performed by The central node is completed.
- the central node can also be used as a node for selecting a CN node. That is, the central node is connected to each eNodeB. When the UE accesses the eNodeB, the eNodeB does not select the CN node, but sends a message to the node. A central node from which a CN node, such as an MME, is selected.
- the MME pool has 10 MMEs and 200 eNodeBs.
- the 10 MMEs only need to send configuration messages to the central node about the configuration change. The number of messages is only 10, and there is no need to send to 200 eNodeBs. Configuration messages with configuration changes greatly reduce the amount of information transferred in the network.
- the first embodiment has the following advantages: The first embodiment obtains the information of the UE identifier by distinguishing the identifier of the UE, and confirms whether the information is network-distributed information or information mapped by the network to the UE, and according to the foregoing Differentiating, selecting a suitable network node for the UE prevents the UE from accessing the corresponding CN node due to changing the RAT.
- the method described in the first embodiment is that when the UE carries the 2G/3G identifier to access the SAE/LTE network, the UE is accessed according to the situation that the cell currently camped by the UE is not in the registered tracking area (TA, Tracking Area).
- TA Tracking Area
- the NAS part in the RRC Connection Setup Complete message for example, the NAS part of the TAU Request message (hereinafter referred to as the NAS part of the RRC connection setup complete message is a NAS message) may not carry the UE identifier.
- UE-id such as GUTI or P-TMSI or IMSI
- TA list the UE can decide whether to carry the UE identifier in the NAS message according to whether the currently accessed TA is in its own TA list (TA list).
- the NAS message carries the UE identifier, it is generally considered that the cell currently camped by the UE is not in the registered TA, but in fact, if the UE message is carried in the NAS message, the cell currently camped by the UE may be The access in the registered TA is performed.
- the NAS message can only be an Attach Request message or a TAU Request message.
- this embodiment provides another access method.
- the case where the cell currently camped by the UE is not in the registered TA will be referred to as a TA not registered case. Otherwise, if the cell currently camped by the UE is in the registered TA, it is called a TA registered case.
- the following describes the TA registered case and the TA not registered case technology, and the TA Registered case and the TA not registered case are the UE carrying the SAE allocation. The identity of the technology when accessing SAE.
- the UE determines whether the currently accessed cell belongs to the registration area of the UE, that is, the UE detects whether the cell currently camped by itself is in the registered TA, and if so,
- the RRC Connection Request (RRC Connection Request) message initiated by the UE accessing the SAE/LTE network in the idle mode carries the S-TMSI, because in this case, the UE does not move out of the original Pool area.
- the eNodeB can directly select the original MME through the MMEC in the S-TMSI (in the case of the MOCN, the MME is also selected according to the selected PLMN-id information carried by the UE), and the S-TMSI carried by the eNodeB is received.
- the NAS message in the RRC connection setup complete message sent by the UE to the eNodeB may not carry the UE identifier in the RRC connection setup complete message.
- the RRC part does not carry With the GUMMEI, after the eNodeB selects the MME, the eNodeB sends an initial UE message to the selected MME, and then the MME acquires the context of the UE according to the S-TMSI, where the initial UE message includes the S-TMSI in the RRC connection setup request initiated by the UE. And the information such as the NAS message in the RRC connection setup complete message; if not, that is, when the UE detects that the cell in which the current camp is not in the registered TA, the UE in the idle idle mode accesses the RRC connection setup request initiated by the SAE/LTE network.
- the message carries a random number ( Random ID ), and then receives the RRC connection setup message that is returned by the eNodeB and carries the random number.
- the UE may not move out of the original pool area because the UE may move out of the original pool area. Therefore, the UE needs to carry the identifier of the UE in the NAS message in the RRC connection setup complete message sent to the eNodeB, and the RRC part in the RRC connection setup complete message carries the GUMMEI, so that the eNodeB can search for the corresponding MME through the GUMMEI.
- the eNodeB selects the MME according to the selected PLMN-id carried by the UE and the MME Group ID and MMEC in the GUMMEI; In the corresponding MME (original MME), the original MME is directly selected. If there is no corresponding MME, the UE has changed the pool, then the eNodeB selects a new MME, and then sends an initial UE message to the selected MME.
- the MME obtains the context of the UE by the selected MME, where the initial UE message includes information such as a NAS message. Referring to FIG. 9 and FIG. 10, FIG.
- FIG. 9 is a flowchart of a method for a UE to access a SAE/LTE network by using a TA registered case
- FIG. 10 is a flowchart of a method for a UE to access an SAE/LTE network by using a TA not registered case.
- the access method provided in this embodiment is: when the UE carries the 2G/3G identifier to access the SAE system, the UE first maps the 2G/3G identifier to the SAE identifier format, and then accesses according to the TA registered case, that is, the UE is in the UE.
- the initiated RRC Connection Request message carries the mapped S-TMSI, and the RRC part in the subsequent RRC connection setup complete message does not carry the GUMMEL but may be in the NAS message in the RRC connection setup complete message. If the eNodeB does not carry the S-TMSL in the initial UE message (the first initial UE message) sent to the MME, the UE may determine whether the currently accessed cell is in the registered TA. If yes, the NAS message in the RRC connection setup complete message does not carry the UE identifier. If not, the NAS message in the RRC connection setup complete message carries the UE identifier.
- the UE can also use the access time. Whether the UE identifier is the SAE allocation or the mapping is performed. If the UE identifier is mapped, the action described in the foregoing method is performed, that is, the performing the UE carries the mapped S-TMSI in the RRC connection setup request message sent to the eNodeB.
- the eNodeB needs to distinguish whether the RRC connection setup request message carries the S-TMSI or the random number, it is necessary to define an identifier in the S-TMSI and the random number, for example, the identifier is named Distinguishing Mark, and the size is defined. 8 bits, if the number on the 8 bits is all 1, it is determined that the RRC connection setup request message carries a random number. If the number on the 8 bits is not 1, it is determined that the RRC connection setup request message carries the S-TMSL, the Distinguishing Mark. Located in the MMEC part of the S-TMSI and the first 8 bits of the random number.
- the MMEC part in the S-TMSI is mapped by the NRI, and the NRI may be all ones, so that the eNodeB mistakenly believes that the received random number, therefore, the NRI needs to be defined. Can't be all ones.
- the UE may not need to determine whether the currently accessed cell belongs to the registration area of the UE, or does not need to determine whether the UE identifier carried by the UE is SAE allocated or mapped, but always uses the TA Registered Case. That is, the S-TMSI is always carried in the RRC Connection Setup Request message sent to the eNodeB, and then in any case, the NAS message in the RRC Connection Setup Complete message always carries the UE identity, and the RRC Connection Setup Request message
- the S-TMSI carried in the eNodeB is only used for the eNodeB to select the MME, and does not need to carry the S-TMSI on the subsequent S1 interface, that is, the initial UE message sent by the eNodeB to the MME does not carry the S-TMSI information, thereby reducing The size of the traffic of the message, which saves the occupied bandwidth.
- the disadvantage of this method is that when the UE replaces the pool, if the new pool also has the same number of MMECs, the eNodeB directly selects the MMEC with the same number in the new pool.
- the corresponding MME does not select a new MME through principles such as Load Balancing.
- the TA not registered case may always be used to access the SAE/LTE network, that is, the RRC connection sent by the UE to the eNodeB.
- the RRC connection part of the subsequent RRC connection setup complete message carries the GUMMEI
- the NAS message of the RRC connection setup complete message carries the UE identifier, but the UE initiates the service request (Service Request).
- Service Request service request
- the above description is only taking the RAN node as the eNodeB and the CN node as the MME.
- the RAN node may also be other devices having similar functions to the eNodeB, and the CN node may also be other devices having similar functions to the MME. .
- the S-TMSI is carried in the RRC connection setup request message initiated by the UE, and then the appropriate CN node is selected for the UE through the S-TMSI, so that the UE cannot access the corresponding RAT due to changing the RAT.
- the present embodiment reduces the traffic size of the message and saves the occupied bandwidth by not carrying the GUMMEI in the RRC connection setup complete message.
- the LAC and the MME GI are set, for example, the bit in the LAC is different from the value in the MMEGI, and the LAC and the MME GL can be distinguished.
- the UE accesses the MME through the GUTI. Include attachment or TAIL If the MME has a UE context (UE Context), the MME finds the UE through the GUTI. Otherwise, the MME finds the old MME through the GUMMEI in the GUTI. For example, the domain name resolution system (DNS, Domain Name System) can be used to find the old MME.
- DNS Domain Name System
- the MME sends a context request (Context Request) to the old MME, where the context request includes a GUTI or an identification request, the identifier request includes a GUTI, the old MME finds the UE Context through the GUTI, and returns the UE Context or the IMSI of the UE.
- Information is given to the MME.
- the MME or the DNS needs to be distinguished from the mapped GUTI according to the GUTI allocated by the network for the UE, for example, the GUTI allocated by the SAE for the UE.
- GUTI is known as the mapped GUTI
- restore the GUTI to the old RAI/P-TMSI or the TLLI/old RAI of the 2G network (if the old SGSN is 2G SGSN) resort find the old SGSN via old RAI or via old RAI and NRI, to old
- the SGSN sends a Context Request, which contains the old RAI, P-TMSI or TLLI, or sends an Authentication Request, which contains the old RAI, P-TMSI or TLLI.
- old SGSN The UE context is found through the TLLI through the old RAI and the P-TMSI, or the old GGSN, and the IMSI information of the UE Context or the UE is returned to the MME.
- the UE sends a tracking area update request, that is, a TAU Request message to the MME, and the TAU Request message includes a GUTI.
- the MME checks whether the GUTI is a true GUTI, that is, the real GUTI allocated to the UE by the SAE network side, or the mapped GUTI. If it is a true GUTI, the MME sends a Context Request to the old MME, the Context Request carries (GUTI, complete TAU Request message) to obtain the context from the old MME, the old MME searches the UE Context through the GUTI, and the complete TAU Request message is the TAU sent by the UE.
- the Request message if the message has integrity protection, carries the message to the old MME for checking the integrity protection by the old MME. If the verification is successful, the UE context is returned to the new MME. If the MME checks that the GUTI is the mapped GUTI, the MME sends a Context Request (old RAI, P-TMSI or TLLI) to the old SGSN, and the old SGSN searches for the UE Context according to the old RAI and the P-TMSI or TLLI.
- a Context Request old RAI, P-TMSI or TLLI
- the MME can send the TAU Request message to the old SGSN according to the GUTI mapping.
- the MME always sends an TAU Request message to the old node, such as the old SGSN, to request authentication, but the old SGSN does not verify the message, and returns no information that the authentication succeeds or is not verified to the MME, so that the MME does not verify whether the GUTI is the mapped identifier.
- the security-related procedure if there is no UE context in the MME, for example, the other MME is indicated by the additional GUTI, the security related procedure may be performed by other MMEs, or the MME finds the UE context saved by itself according to the Additional GUTI, The UE performs security verification, or the MME initiates a security authentication process to the UE.
- the UE carries the Additional GUTI to indicate that the UE has the UE context in the accessed MME, and the accessed MME performs security verification on the UE. If the security certificate is passed, the Context Request or the Identification Request sent to the old SGSN carries the UE. Verified information.
- the new MME obtains the security context from the MME indicated by the Additional GUTI, and the new MME authenticates the UE according to the obtained security information; or the new MME attaches an Attach Request message or TAU The Request message is sent to the MME indicated by the Additional GUTI for verification.
- the UE does not perform integrity protection on messages such as the TAU Request message or the Attach Request message.
- the UE If the UE carries the mapped GUTI access, the UE carries the P-TMSI Signature field assigned to it by the SGSN, and sends it to the network. After receiving the MME, the MME sends the P-TMSI Signature field to the old SGSN for UE verification. That is, if the UE carries the old RAI/P-TMSI or TLLI mapped GUTI access SAE, the UE carries the P-TMSI Signature cell, and the Context Request message sent by the MME to the old SGSN also carries the P-TMSI Signature cell, requesting old The SGSN authenticates the UE.
- the above security problem can also be applied to the following embodiments in which the UE carries the mapped GUTI access SAE system or the UE carries the mapped old RAI/P-TMSI (or TLLI) /P-TMSI Signature to access 2G/3G.
- the MME and the SGSN need to exchange positions).
- the MME directly maps the GUTI.
- the MME maps or restores the GUTI to the old RAI/P-TMSI (or TLLI) /P-TMSI Signature or the old RAI/P-TMSI, or the P-TMSI in the form of the TLLI, through the old RAI/ The form of P-TMSI (or TLLI) / P-TMSI Signature obtains the context from the old entity, such as old MME or old SGSN. If it is old MME, old MME maps or restores old RAI/P-TMSI to GUTI to obtain UE Context. If it is the old SGSN, the old SGSN finds the UE Context directly according to the old RAI/P-TMSI (or TLLI), P-TMSI Signature, see Figure 3.
- the difference from the third embodiment is that, in this embodiment, after determining the mapped GUTI, different operations are performed according to whether the corresponding old SGSN is S4 SGSN or Gn/Gp SGSN.
- the access node learns whether the old node is the MME/S4-SGSN or the Gn/Gp SGSN. Operation. For example, when the UE accesses the MME through the old RAI/P-TMSI mapped GUTI, the specific access mode may be an Attach or TAU mode.
- the MME sends a Context Request to the old SGSN, the Context Request GUTI Contains GUTI, or sends an Identification Request, which contains GUTI, which is determined by old SGSN according to GUTI, restores GUTI to old RAI, P-TMSI, or reverts to old RAI, P-TMSI TLLI, through old RAI and P-TMSI , or the old RAI and/or TLLI finds the UE context, returns the UE Context or IMSI, etc.
- the MME restores the old RAI/P-TMSI (or TLLI) and sends the SGSN Context Request (old RAI) to the old SGSN.
- P-TMSI or TLLI or Identification Request (old RAI, P-TMSI or TLLI)
- old SGSN finds the UE context through old RAI and P-TMSI (or TLLI) and returns it to the MME.
- the temporary identifier used by the UE for the next update is used.
- TIN Temporary Identity used in Next update
- P-TMSI or TLLI temporary identifier used by the UE to de-attach Detach at 2G/3G.
- the UE needs to use old RAI/P-TMSI, where P-TMSI can also be
- the TLLI mapped GUTI accesses the SAE; the MME receives the mapped GUTI, which can be directly restored to the old RAI/P-TMSK or TLLI) or whether the old SGSN is the S4 SGSN or the Gn/Gp SGSN. If the old SGSN is the S4 SGSN, The UE may obtain the IMSI and the context, etc.
- the S4 SGSN restores the GUTI to the old RAI/P-TMSI (or TLLI) to find the UE context and return to the IMSI.
- the MME uses the restored old RAI/P-TMSI (or TLLI) to obtain information from the old SGSN, and requests the Identification Request by the identity, which carries the old RAI/P-TMSI (or TLLI). ).
- the UE may also use the temporary identifier allocated by the access RAT when attaching, and regardless of the indication of the TIN, if there is no temporary identifier of the access RAT, the temporary use of another RAT is used.
- the identity, or if none of the temporary identities of the RATs are present, access is made using the IMSI.
- the GUTI is a true GUTI, then the Identification Request message may be carried from the UE. The complete Attach Request message is sent to the old MME for integrity protection verification. If the MME finds that the GUTI is the mapped GUTI, the MME does not need to carry the Attach Request message in the Identification Request message sent to the SGSN, and needs to be the UE. Perform security verification.
- the RAI/P-TMSI indicates that the UE has a context locally, and the UE performs a security procedure such as integrity protection verification locally, so that an access entity, such as an MME or an SGSN, does not need an old entity indicated to the TIN, such as an old MME or The old SGSN, which requires integrity protection verification, and the like, and if the UE has performed integrity protection verification locally, the access entity carries the UE verified information in the Context Request, and the old entity does not have to verify the UE.
- a security procedure such as integrity protection verification locally
- the access entity may request the old entity to perform integrity protection verification on the UE, for example, the access entity sends the UE The message is sent to the old entity and the old entity is verified. Otherwise, the access entity may not require the old entity to perform security procedures on the UE. For example, the access entity does not send the message sent by the UE to the old entity, or the access entity requires the old entity to perform a security process on the UE, but if the old entity cannot verify (If the old entity and the access entity are not the same RAT), the old entity returns information such as verification failure or incomplete verification, and the access entity is required to verify the UE by itself. In addition, if the UE's TIN indicates "P-TMSI" or
- the Bay' J UE needs to carry the P-TMSI Signature when it is connected to the Attach or TAU/RAU for security verification of the UE, that is, the access entity carries the old entity to verify the UE, otherwise if the UE's TIN
- the indication is "GUTI”
- the UE needs to carry the P-TMSI Signature when accessing 2G/3G, because GUTI needs to have part of the information mapped to the P-TMSI Signature.
- the UE accesses the MME through the GUTI.
- the UE carries the old RAI/P-TMSI/P-TMSI Signature access to the SGSN, where P-TMSI can also be TLLI.
- the SGSN or DNS is different from the mapped flag according to the true old RAI/P-TMSI (or TLLI) /P-TMSI Signature - - If MMEGI is different from LAC's lbit - find old MME or old SGSN.
- the SGSN can always obtain the context from the old entity through the old RAI/P-TMSI/P-TMSI Signature form. If the old entity is the MME, the SGSN to the old MME Send SGSN Context Request, the Context Request contains old RAI, P-TMSI/TLLI, P-TMSI Signature, old MME restores GUTI, finds UE Context, returns UE Context, and returns EPS Context or 2G/ according to interface or Context Request content.
- the UE accesses the SGSN by sending an RAU request message, that is, through the old RAI, P-TMSI/TLLI, P-TMSI Signature, if the UE uses the GUTI mapped old RAI, P-TMSI/TLLI, P- The TMSI Signature is accessed, then the SGSN finds the old MME address and sends a Context Request to the old MME.
- the Context Request carries the message (old RAI, P-TMSI/TLLI, P-TMSI Signature), old MME according to old RAI, P-TMSI/ TLLI, P-TMSI Signature restores the GUTI, finds the UE context and returns the UE Context.
- the old MME does not have P-TMSI Signature information, the following methods can be used to authenticate the UE:
- the Old MME carries the UE security unauthenticated information in the returned Context Response, for example, carrying the Cause value of 'P-TMSI Signature mismatch', so that the SGSN re-authenticates the UE.
- the SGSN always authenticates the UE and sends it to the old MME.
- the Context Request carries the "MS Validated" message, indicating that the UE has passed the verification. If the SGSN has a UE context, where the UE Context can be found through the Additional RAI/P-TMSI, the SGSN first verifies the UE. If the risk is successful, the Context Request sent to the old MME carries the "MS Validated" message, indicating that the UE has passed. verification.
- the difference from the sixth embodiment is that in the sixth embodiment, the old RAI/P-TMSI/P-TMSI Signature is restored to the GUTI by the old MME, where the P-TMSI can be a TLLI.
- the old RAI/P-TMSI (or TLLI) / P-TMSI Signature is restored to the GUTI by the SGSN.
- the SGSN knows whether the old entity is the MME or the SGSN.
- the S4 SGSN restores the GUTI, sends a Context Request (GUTI) to the old MME, and the old MME finds the UE Context according to the GUTI, and returns the UE Context o.
- GUI Context Request
- the security problem is the same as the third to sixth embodiment. If the SGSN has a UE context locally, the P-TMSI Signature is verified. If there is no UE context and the old entity is found to correspond to the MME, the SGSN always The UE initiates a security procedure, and the SGSN restores the GUTI and requests the UE context from the old MME.
- the access node can distinguish whether the temporary identifier is the original temporary identifier or the mapped identifier, and can also use the DNS to analyze whether the temporary identifier is the mapped identifier after being analyzed by the DNS. If the access node and the DNS translation of the old node address are incorrect, the translated old node receives the Context Request, continues to find the real old node, and relays the message to the real old node.
- the UE may also carry an Additional TMSI (with a temporary identifier), that is, the UE carries the Additional GUTI when accessing the SAE, and carries the Additional old RAI/P-TMSI when accessing the 2G/3G, where the P-TMSI is also
- the TLLI the role of the Additional TMSI is to find a possible UE Context within the access RAT entity, and obtain the context using the temporary identifier indicated by the TIN, so that the acquired context can be directly merged into the UE in the RAT entity.
- the access RAT needs to re-query whether the RAT entity has a UE Context according to the IMSI information in the acquired context, and then merge to cause complexity.
- the Additional TMSI may not need to be carried in the following cases to save air interface resources: periodic location update (Periodic TAU or Periodic RAU) or TAU or RAU during handover; or the temporary identifier indicated by the TIN is consistent with the Additional temporary identifier. That is, the TIN indicates the temporary identifier of the access RAT; or the UE has the temporary identifier of the access RAT in the Attach process.
- the processing of the temporary identification by each node is clarified. It can be achieved:
- the true GUTI is different from the mapped GUTI;
- the real old RAI/P-TMSI (or TLLI) is also distinguished from the mapped old RAI/P-TMSI (or TLLI). For example, if a bit is set in the LAC and MMEGI, the LAC is always 0, and the MMEGI is always 1.
- the eNodeB When the UE uses the old RAI/P-TMSI-mapped GUTI to access the SAE, the eNodeB knows that the UE uses the old RAI/P-TMSI access, and then selects the MME corresponding to the NRI; or the eNodeB determines whether the LAC is configured or not. Whether to select the NRI corresponding MME or reselect the MME.
- the MME When the UE accesses the MME through the old RAI/P-TMSI mapped GUTI, the MME knows the
- GUTI is the mapped GUTI, restore old RAI/P-TMSI/TLLI, find old SGSN through old RAI and NRI, send Context Request to old SGSN, the Context Request carries (old RAI, P-TMSI/TLLI), old SGSN passes The old RAI and P-TMSI/TLLI find the UE context and return it to the MME.
- the MME knows that the GUTI is the mapped GUTI, and the MME queries whether the old SGSN is the S4 SGSN or the Gn/Gp SGSN.
- the MME sends a Context Request (GUTI) to the old SGSN, that is, the Context Request carries the GUTI, or sends an Identification Request, the old SGSN restores the GUTI to the old RAI, P-TMSI/TLLI, through the old RAI and P.
- - TMSI/TLLI finds the UE context and returns it to the MME.
- the MME restores the old RAI/P-TMSI/TLLI and sends a Context Request to the old SGSN, which carries (old RAI, P- TMSI/TLLI), old SGSN finds the UE context through old RAI and P-TMSI/TLLI, and returns it to the MME.
- the Additional TMSI may not be needed when the TAU/RAU, Periodic TAU/RAU, TIN indication temporary identity of the handover HO is consistent with the Additional temporary identity or the UE has a temporary identity of the access RAT during the Attach procedure.
- the UE may carry the two CNMN-ids or configurations to allow the RAN node to select the corresponding CN node.
- the RAN node or the access node can perform corresponding appropriate processing to prevent selection of an erroneous node or transmission of an inconsistent parameter to the corresponding node.
- An embodiment of the present invention further provides a method for allocating a network resource node to a user equipment UE, where the method includes:
- the network side allocates a network resource node to the UE according to the mapping attribute of the temporary identifier.
- mapping attribute of the temporary identifier carried by the user equipment UE is obtained by the network side, and the network side determines whether the user identifier is allocated by the network side or mapped.
- the network side of the user equipment UE is the system architecture evolution network SAE
- the network side obtains the mapping attribute of the identity identifier carried by the user equipment UE, and specifically: the evolved base station eNodeB of the SAE network determines that the UE carries the global The unique mobility management entity identifier GUMMEI/or the mobility management entity group identifier MMEGI in the GUMMEI is allocated or mapped by the SAE; If the GUMMEI/or MMEGI is allocated by the SAE, the network side allocates the network resource node to the UE according to the mapping attribute of the identifier: the eNodeB selects the mobility management entity MME according to the GUMMEI or the MMEGI and the mobility management entity coding MMEC;
- the network side allocates a network resource node to the UE according to the mapping attribute of the identifier, specifically, the eNodeB selects the MME according to the mobile country code MCC, the mobile network code MNC, and the MMEC in the GUMMEI; or the eNodeB is configured according to The MMEC in GUMMEI selects the MME.
- the network side of the user equipment UE is the system architecture evolution network S AE
- the network side acquires the mapping attribute of the identity identifier carried by the user equipment UE, which is specifically: the mobility management entity MME of the SAE network determines that the UE carries The global unique temporary identifier GUTI is allocated or mapped by the SAE;
- the network side further includes, before the network resource node is allocated to the UE according to the mapping attribute of the identifier, the MME uses the GUTI to obtain the context of the UE from the old mobility management entity old MME;
- the network side further includes, before the network resource node is allocated to the UE according to the mapping attribute of the identifier, the MME restores the GUTI to the old routing area identifier old RAI/packet temporary mobile subscriber identity P-TMSI or restores to old The RAI/logical link temporarily identifies the TLLI; and uses the old RAI/P-TMSI or old RAI/TLLI to obtain the context of the UE from the old serving general packet radio service support node old SGSN.
- the embodiment of the present invention further provides a user equipment UE, where the UE includes, when the UE accesses the SAE system by using the mapped GUTI, does not perform integrity protection on the access message.
- the network side device includes an identifier attribute obtaining module 701, configured to distinguish whether the UE uses the mapped temporary identifier or the real temporary identifier, and the real temporary identifier is the network side assigned identifier; the network side node may be wireless. Access network node.
- the network resource node allocation module 702 allocates a network resource node to the UE according to the attribute of the temporary identifier of the UE, that is, whether the UE is an identifier allocated by the network side or a mapped identifier.
- the network resource node includes an MME or an SGSN or a CN node.
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Description
接入、 获取用户设备上下文及用户设备标识的方法和装置 本申请要求于 2008 年 6 月 18 日提交中国专利局、 申请号为 200810039358.X , 和于 2008 年 11 月 3 日提交中国专利局、 申请号为 200810175964.4、 和于 2009 年 1 月 5 日提交中国专利局、 申请号为 200910003541.9、 发明名称为 "接入、 获取用户设备上下文及用户设备标识的 方法和装置"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领域, 尤其涉及接入、获取用户设备上下文及用户设 备标识的方法和装置。
背景技术
在现有的通信网络中, 存在传统的第二代(2G, Second Generation )通信 网络, 第三代(3G, 3rd Generation )通信网络, 以及融合了更多先进技术的 长期演进(LTE, Long Term Evolution ) /系统体系结构演进(SAE, System Architecture Evolution )网络。通信网络一般由无线接入网(RAN, Radio Access Network )和核心网 ( CN , Core Network )组成, 不同的通信网络会采用不同 的无线接入技术 ( RAT , Radio Access Technology )进入 CN, 即不同的通信 网络具有不同的 RAN, 例如 3G通信网络的 RAN称为通用陆地无线接入网 ( UTRAN, Universal Terrestrial Radio Access Network ), SAE通信网络的 RAN 称为 E-UTRAN等等。
RAN由 RAN节点组成,例如 UTRAN中的无线网络控制器( RNC , Radio
Network Controller)和基站( NodeB ); CN则是由 CN节点组成, 例如 UTRAN 中的 SGSN (服务 GPRS 支持节点, Serving GPRS Support Node ), 或者 E-UTRAN中的移动性管理实体(MME, Mobility Management Entity )等。 其 中, MME的功能是保存用户设备(UE, User Equipment ) 的移动性管理上下 文(Context ), 筒称 UE的上下文, 如 UE标识, 移动性管理状态、 位置信息 等。
现有技术中,一个 RAN节点可以路由到多个 CN节点, 即 RAN节点可以 为初始接入的 UE选择路由到不同的 CN节点上。 这些 CN节点组成一个池域 ( Pool ), 2G/3G系统中的 Pool内的 CN节点,如 SGSN用网络资源标识 (NRI,
Network Resource Identifier )来标识, SAE系统中的 Pool内的 CN节点则是用 全球唯一移动性管理实体标识(GUMMEI )来标识。
当 UE接入到通信网络时, 通信网络会分配给 UE一个临时标识, 例如 2G/3G 系统会分配分组临时用户标识 (P-TMSI , Packet Temporary Mobile Subscriber Identity )/ TMSI给 UE, SAE系统则会分配全球唯一临时标识( GUTI, Global Unique Temporary Identity)给 UE, 其中, GUTI中包括 GUMMEI。 由于 UE会在不同的通信网络中移动, 所以, 在 UE从原通信网络切换到新通信网 络, 或者是从原 CN节点切换到新 CN节点时, 需要通过 NRI/ GUMMEI和 UE的临时标识查找原 CN节点来获取 UE的上下文, 以便可以快速切换。 如 果是不同通信网络间的切换, 由于它们采用的 RAT不一样, 所以当 UE从原 通信网络接入新通信网络时,还需要映射原通信网络的 RAT的标识,即旧 RAT 的标识到新通信网络的 RAT的标识来接入, 这样, 才可能找到原通信网络中 的 CN节点, 才可能获取 UE的上下文。 例如:
具体的, GUTI临时标识的组成为: GUTI = GUMMEI + M-TMSI ; 其中, GUMMEI = PLMN-id + MMEI, PLMN-id = MCC+ MNC; MMEI = MME Goup ID + MMEC ; 因此展开可以得到:
GUTI = MCC + MNC + MME Group ID (16bit) + MMEC (8bit) + M-TMSI (32 bit);
GUMMEI = MCC + MNC + MME Group ID + MMEC;
MMEI = MME Group ID + MMEC;
S-TMSI (40 bit) = MMEC + M-TMSI
当 UE携带 2G/3G的临时标识 P-TMSI/旧 RAI接入 SAE系统时, 需要将 2G/3G的临时标识映射为 GUTI的形式, 参见图 11 , 即将旧 RAI中的移动国 家码( MCC, Mobile Country Code )和移动网络码( MNC, Mobile Network Code ) 分别映射到 GUTI中的 MCC和 MNC中,将区分位置区码( LAC , Location Area Code ) 映射到 GUTI 中的移动性管理实体组标识 ( MMEGI , Mobility Management Entity Group Identity ), 将 NRI映射到 GUTI中的移动性管理实体 编码( MMEC, Mobility Management Entity Code )中, 将 RAC和其他 P-TMSI 内容映射到 GUTI中的 M-TMSL
在实现本发明的过程中, 发明人发现现有技术至少存在以下问题: 由于映射后的 RAT的标识与真正的 RAT的标识有所不同, 因此映射后的
RAT的标识可能无法对应 CN节点,即可能会出现在新通信网络中选择不到新
CN节点的情况。
另外, 由于具有不同的通信网络, 所以如果新 CN 节点不能识别当前的
RAT的标识是真正的 RAT的标识还是映射后的 RAT的标识的话,就不知道采 用何种形式的 RAT向原 CN节点获取 UE上下文,导致可能无法获取 UE上下 文。
发明内容
本发明实施例的目的在于提供接入、获取用户设备上下文及用户设备标识 的方法和装置, 实现对临时标识的灵活运用。
本发明实施例提供一种接入的方法, 该方法包括:
UE接入 SAE时, 网络侧节点, 例如演进基站(eNodeB)或预置的中心节 的还是映射的;
如果所述 GUMMEI或 MMEGI是 SAE分配的, 所述 eNodeB根据所述 GUMMEI, 或者根据所述 MMEGI和 MMEC, 或者根据所述选择的公共陆地 移动网络( PLMN, Public Land Mobile Network )的标识(以下均称为 PLMN-id ) 和 MMEGI和 MMEC来选择移动性管理实体 MME;
如果所述 GUMMEI或 MMEGI是映射的,所述 eNodeB根据所述 GUMMEI 中的 MCC、 MNC和 MMEC选择 MME,或者根据所述 GUMMEI中的 MMEC 选择 MME, 或者根据选择的 PLMN-id和 GUMMEI中的 MMEC选择 MME。
本发明实施例还提供一种接入的方法, 该方法包括:
UE接入 SAE时, MME判断所述 UE携带的 GUTI是 SAE分配的还是映 射的;
如果所述 GUTI是 SAE分配的,所述 MME用所述 GUTI向旧移动性管理 实体 (old MME)取 UE的上下文;
如果所述 GUTI是映射的, 所述 MME把所述 GUTI还原成旧路由区标识 (old RAI, old Routing Area Identification )和分组临时移动用户标识 P-TMSI,
或者, 还原成 old RAI 和逻辑链路临时标识 (TLLI, Temporary Logical Link Identity ) , 并根据所述还原后的标识向旧服务通用分组无线业务支持节点 (old SGSN)取 UE的上下文。
本发明实施例还提供一种接入的方法, 该方法包括:
UE接入 SAE时, MME将所述 UE携带的 GUTI映射成 old RAI和 P-TMSI , 或者, TLLI和分组临时移动用户标识签名(P-TMSI Signature)的形式;
所述 MME用映射后的 old RAI和 P-TMSI,或, TLLI和 P-TMSI Signature 向 old MME或者 old SGSN获取 UE的上下文;
所述 old MME将所述 old RAI和 P-TMSI,或者, old RAI和 TLLI和 P-TMSI Signature还原成 GUTI , 并根据还原得到的 GUTI向所述 MME返回 UE的上 下文。
本发明实施例还提供一种接入的方法, 该方法包括:
用户设备 UE接入系统架构演进网络 SAE时,
如果所述旧节点是 MME, 所述 MME用所述 GUTI向旧移动性管理实体 old MME取 UE的上下文;
如果所述旧节点是 Gn/Gp SGSN , 则所述 MME把所述 GUTI还原成旧路 由区标识 old RAI和分组临时移动用户标识 P-TMSI, 或者还原成逻辑链路临 时标识 TLLI; 并用所述还原后的标识向 old SGSN获取 UE的上下文;
如果所述旧节点是 S4 SGSN, 则所述 MME用所述 GUTI向 old SGSN获 取 UE的上下文; 所述 old SGSN把所述GUΉ还原成old RAI和P-TMSI, 或 者还原成 old RAI/TLLI标识,并通过所述标识找到 UE的上下文后返回给所述 MME。
本发明实施例还提供一种接入的方法, 该方法包括:
UE接入 2G/3G网络时, SGSN根据所述 UE携带的 old RAI和 P-TMSI, 或者, TLLI, 查找对应的旧实体地址, 向旧实体获取 UE的上下文;
如果所述旧实体是 old MME,所述 old MME还原所述 old RAI和 P-TMSI, 或, 还原所述 TLLI和 P-TMSI Signature为 GUTI, 向所述 SGSN返回找到的 UE的上下文。
本发明实施例还提供一种接入的方法, 该方法包括:
UE接入 2G/3G网络时, SGSN根据所述 UE携带的 old RAI和 P-TMSI, 或, 根据所述 UE携带的 TLLI和 P-TMSI Signature是 2G/3G分配的还是映射 的, 查找对应的旧实体是 old SGSN还是 old MME;
如果所述 UE携带的 old RAI和 P-TMSI, 或, TLLI和 P-TMSI Signature 是映射的,所述旧实体是 old MME, 所述 SGSN根据所述 old RAI和 P-TMSI, 或, TLLI/P-TMSI Signature还原 GUTI, 并用 GUTI向所述 old MME获取 UE 的上下文; 所述 old MME将根据 GUTI找到 UE上下文并返回给 SGSN;
如果 UE携带的 old RAI和 P-TMSI,或, TLLI和 P-TMSI Signature是 2G/3G 分配的, 所述旧实体是 old SGSN, 所述 SGSN用所述 old RAI和 P-TMSI, 或, TLLI向所述 old SGSN获取 UE的上下文。
本发明实施例还提供一种获取用户设备 UE上下文的方法, 该方法包括: 当下次更新使用的临时标只 ( TIN, Temporary Identity used in Next update ) 指示的临时标识与附加(Additional )临时标识一致, 用户设备 UE只携带 TIN 指示的临时标识接入;
接入节点通过 UE携带的 TIN指示的临时标识找到 UE上下文。
本发明实施例还提供一种获取用户设备 UE上下文的方法, 该方法包括: 在切换过程中的跟踪区更新 ( TAU , Tracking Area Update )或路由区更新 (RAU, Routing Area Update), UE只需要携带本 RAT系统的 TMSI或者不携 带任何 TMSI, UE通过目标侧建立好的连接找到 UE上下文。
本发明实施例还提供一种获取 UE标识的方法, 该方法包括:
在 UE发起附着 (Attach)过程中,
如果 UE存在 RAT的临时标识, 则携带所述临时标识, 接入实体通过所 述临时标识查找对应节点, 获取 UE的国际移动用户标识 (IMSI, International
Mobile Subscriber Identity)和安全参数;
如果 UE不存在接入 RAT的临时标识, 但存在另一 RAT的临时标识, 则 携带所述另一 RAT的临时标识,接入实体通过所述另一 RAT的临时标识查找 对应节点, 获取 UE的 IMSI和安全参数。
本发明实施例还提供一种网络侧装置, 包括如下模块,
标识属性获取模块, 用于获取当前接入网络侧的 UE的临时标识的属性,
所述 UE的临时标识的属性为, 所述 UE标识是网络侧分配的还是映射的; 网络资源节点分配模块, 根据所述 UE的临时标识的属性为 UE分配网络 资源节点。
用户设备 UE接入系统架构演进网络 SAE 时, UE在发送给演进基站 eNodeB的无线资源控制协议(RRC, Radio Resource Control )连接建立请求 消息中携带 SAE网络的临时移动用户标识( S-TMSI, 由 MMEC和 M-TMSI 组成,如果 UE携带 2G/3G的标识接入 SAE/LTE系统,则 S-TMSI实际由 NRI 和 RAC和部分 P-TMSI映射而成),在发送给 eNodeB的 RRC连接建立完成消 息中不携带全球唯一移动性管理实体标识 GUMMEI;
eNodeB根据接收到的 S-TMSI选择对应的移动性管理实体 MME,如果没 有对应的 MME, 则 eNodeB选择一个新的 MME。
本发明实施例通过对 UE接入网络侧时携带的临时标识区别为网络侧分配 的还是映射的,从而针对不同临时标识采用不同的接入方法, 实现对临时标识 的灵活应用。
附图说明
图 1是本发明实施例一中接入方法的流程示意图;
图 2是本发明实施例三中接入方法的流程示意图;
图 3是本发明实施例四中接入方法的流程示意图;
图 4是本发明实施例五中接入方法的流程示意图;
图 5是本发明实施例六中接入方法的流程示意图;
图 6是本发明实施例七中接入方法的流程示意图;
图 7是本发明实施例中网络侧装置的结构示意图;
图 8本发明实施例一中的网络场景示意图;
图 9为本发明实施例二中 UE使用 TA registered case接入 SAE/LTE网络时 的方法流程图;
图 10为本发明实施例二中 UE使用 TA not registered case接入 SAE/LTE 网络时的方法流程图;
图 11为将 2G/3G的临时标识映射为 GUTI的示意图。
具体实施方式
下面结合附图对本发明实施例的具体实施方式做进一步的详细阐述。
实施例一、
本实施例提供了 LAC和 MMEGI的方法, 例如设置 LAC中的 bit位与 MMEGI中对应的 bit位的数值不同, 可以区分 LAC和 MMEGI。 具体的设置 方法, 例如, MMEGI的第一 bit为 1 , LAC的第一 bit为 0, 该 bit称为区分 MMEGI和 LAC的标志位, 当然也可以使用其他 bit作为区分标志位。 这样当 UE通过 3G网络中的 old RAI和 P-TMSI ,或 old RAI和 2G通信网络中的 TLLI , 映射后的 GUTI接入 eNodeB时, eNodeB通过该区分, 了解 UE是否使用真正 的临时标识还是映射的临时标识接入。 例如, eNodeB获取是 SAE分配的临时 标识(如 GUMMEI, S-TMSI或 GUTI ), 还是使用映射后的临时标识, 如上所 述, old RAI和 P-TMSI (或 old RAI和 TLLI )映射后的 GUTI接入。 在 UE携 带映射后的 GUTI接入的情况下, eNodeB选择 NRI映射的 MMEC对应的 MME, 该 MME可以不是 UE原来注册的 MME, 或者, 使用该 NRI映射的 MMEC对应的 MME,且该 MME为空闲状态信令减少( ISR, Idle mode Signaling Reduction )允许的节点或合一节点或为配置的节点时, 则选择该节点。
请参阅图 1 , UE在接入 SAE过程中在无线资源控制协议(RRC, Radio Resource Control )部分携带 GUMMEI信息, 即在 UE发送给 eNodeB的跟踪 区更新请求( TAU Request )消息中的 RRC部分携带 GUMMEI信息, eNodeB 检查 GUMMEI是映射后的 GUMMEI, 还是 SAE分配的 GUMMEI, 如果是 SAE 分配的 GUMMEI , 则 eNodeB 根据 GUMMEI 中的所有信息, MCC+MNC+MMEGI+MMEC , 或 MMEGI+MMEC , 或 selected PLMN+MMEGI+MMEC 来确定 MME , 或者, eNodeB 由于找不到对应 GUMMEI而进行 MME的重选择, 如果存在与 MCC+MNC+MMEGI+MMEC 或 MMEGI+MMEC或 selected PLMN+MMEGI+MMEC对应的 MME, 则选择 该 MME,该 MME的 GUMMEI与 UE携带的 GUMMEI—致或 MMEGI+MMEC 或 selected PLMN+MMEGI+MMEC对应一致。 如果不存在对应的 MME则 eNodeB重新选择 MME。如果 GUMMEI是映射的 GUMMEI, 则 eNodeB根据 GUMMEI 中的 MCC+MNC+MMEC 或者只根据 MMEC 或者 selected PLM+MMEC来确定 MME,具体为,如果存在 MME,该 MME的 MCC、 MNC、
MMEC与 UE携带的 MCC、 MNC、 MMEC (由 NRI映射 )一致或配置可选, 例如: eNodeB配置 MMEC或 NRI对应某 MME, 则选择该 MME, 否则, 重 选择一个 MME。
或者, 如果 UE在接入 SAE过程中, 根据 UE将携带的标识, 如通过 TIN ( Temporary Identity used in Next update, 下次更新需要使用的临时标识 )来识 别将要携带的标识, 如果 TIN="P-TMSr,, 表示下次接入需要携带 P-TMSI/old RAI映射后的标识, 如果 TIN="GUTr, 表示下次接入携带 SAE的标识, 如果 TIN="RAT-related TMSI" ,表示下次接入那个 RAT就用那个 RAT分配的 TMSI。 因此如果 UE 的 TIN="P-TMSr时, UE 可以在 RRC 部分不携带映射后的 GUMMEI接入网络, 而是在 RRC部分携带 S-TMSI (由 MMEC和 M-TMSI 组成, 实际由 NRI和 RAC和部分 P-TMSI映射而成 )接入网络, 这样 eNodeB 不会得到 MMEGI, eNodeB会根据其中的 MMEC(由 NRI映射)来选择 MME。 当然, 如果存在 MOCN, eNodeB除根据 S-TMSI中的 MMEC选择 MME, 还 会根据选择的 PLMN-id ( Selected PLMN-id )信息来选择 MME, 即 eNodeB 根据选择的 PLMN-id和 MMEGI和 MMEC选择移动性管理实体 MME, 具体 为如果 MME的 GUMMEI中的 MCC、 MNC与 UE携带的选择的 PLMN-id 相同,同时 MMEC 和 UE携带的 MMEC相同,则所述网络侧节点选择该 MME。 此外, UE还需要在非接入层 ( NAS , Non Access Stratum )部分携带映射后的 GUTI, 这样 MME才能向 old SGSN获取上下文。
或者, eNodeB配置 LAC列表, 当 eNodeB发现 MMEGI属于该 LAC列 表或该 LAC列表之一, 则选择对应的 MME , 例如当 eNodeB发现 UE携带的 GUMMEI 与配置在 eNodeB 对应的某 MME 的标识一致时, 则选择对应的 MME, 否则, 如果没有对应 MME, 进行新的 MME选择; 其中, 该 MME的 GUMMEI标识实际由 PLMN-id+LAC+NRI映射组成。 例如, SAE的 Pool与 2G/3G的 Pool重叠, 该 Pool存在 MME/SGSN合一节点, 2G/3G的该 Pool下 存在 RAIl , RAI2, RAI3, 三个路由区(RA, Routing Area ), 当 UE从 2G/3G 网络移动到 SAE网络并接入, UE使用 old RAI/P-TMSI映射的 GUTI接入, eNodeB根据配置的信息, 发现 UE使用映射的 GUTI, 并且映射前的 RA属于 RAI1、 RAI2、 RAI3其中之一, 则 eNodeB根据 MCC+MNC+MMEC (由 NRI
映射 )或 MMEC或 selected PLMN+MMEC选择对应 MME即可, 不必 MCC、 MNC、 MMEGL MMEC都一致才选择 MME。 如果没有符合上述情况描述的 对应的 MME, 例如不属于配置的 RAI之一, 则重新选择一个 MME。
其中, eNodeB配置 LAC列表可以采用以下方法。
MME通过 S1配置响应( SI SETUP RESPONSE )消息或 MME 配置更新
( CONFIGURATION UPDATE ) 消息, 将配置的 LAC映射成 GUMMEI发送 给 eNodeB , eNodeB 纪录该 SI SETUP RESPONSE 消息或 MME CONFIGURATION UPDATE消息, 保存至配置信息中, 即 LAC列表中。 下面 将举例进行说明。
例如图 8中, Pooll包括 SGSN Pool和 MME Pool, SGSN1、 SGSN2、 MME1、
MME2 等均为 Pooll 中的节点, Pooll 中还存在 MME/SGSN 合一节点 SGSN3/MME3, 图 8中的 LAC1、 LAC2、 LAC3和 LAC4等则分别是 2G/3G 网络中的位置区码, TA1、 TA2、 TA3和 TA4等则分别是 SAE网络的跟踪区; 其中,从 SAE系统角度来看,合一节点 SGSN3/MME3的 GUMMEI为 PLMN-id ( PLMN Identity, PLMN标识, 其中, PLMN-id为 MCC+MNC ) +MMEGI (即 MME Pool的 id ) +MMEC (即 MME Pool中 MME3的 id ), 为了让注册到该 合一节点的 SGSN, 即 SGSN3上的 UE从 2G/3G区域进入 SAE区域时也能选 择到该合一节点, MME3可以将该 SGSN3 Pool内的所有 LAC也配置到 eNodeB 中, 形成 LAC列表, 方法如下:
针对 Pooll中的每个 LAC, MME3分别形成一个 GUMMEI,该 GUMMEI 对应为 PLMN-id+LAC+NRI (即合一节点配置到 SGSN, 即 SGSN3上的 NRI, 一般和该合一节点配置到 MME上的 MMEC相等;), 因此, MME3可以形成 若干个 GUMMEI。 该 MME3将真正的 GUMMEI ( SAE内的标识 ) 与映射后 的 GUMMEI (有若干个, Pooll中的每个 LAC对应一个 GUMMEI )的列表通 过 SI SETUP RESPONSE消息或 MME CONFIGURATION UPDATE消息发送 给 eNodeB, eNodeB保存该 GUMMEI列表(或者说是 LAC列表, 因为每个 LAC都有着对应的 GUMMEI ) ,从而当注册到 SGSN3的 UE从 Pooll中的 LAC, 例如 LAC1或 LAC2等进入到 E-UTRAN区域, 接入 eNodeB时, 由于 UE接 入携带的标识为 GUMMEI (由 PLMN-id+LACl+NRI映射), 因此该 eNodeB
可以通过查询配置, 即通过查询之前保存的真正的 GUMMEI 和映射后的 GUMMEI的列表, 得知该 GUMMEI对应 MME3, 然后直接选择该 MME3节 点。
以上配置方法存在的缺点在于, 由于合一节点和 ISR需求, 一个 MME可 能会存在大量的映射 GUMMEI, 因为 MME对 Pool内的每个 LAC都会对应 地形成一个 MMEGI, 甚至 MME还会为相邻 SGSN Pool内的每个 LAC也分 别配置一个 MMEGI以满足 ISR的需求, 因此,在 SI SETUP RESPONSE消息 或 MME CONFIGURATION UPDATE消息中,可能需要携带大量的 GUMMEL 目前 SI SETUP RESPONSE消息和 MME CONFIGURATION UPDATE消 息是通过下面方法来携带 GUMMEI列表的, 参见表一, 其中, 为了描述方便, 表中省略了其他信元。
如表一所示, SI SETUP RESPONSE 消息或 MME CONFIGURATION
UPDATE消息中会携带完整的 GUMMEI列表, 即服务 GUMMEI列表。 另夕卜, 当 SGSN Pool增加 /删除 /修改 LAC时, MME都会通过 MME CONFIGURATION UPDATE消息将所有的 GUMMEI列表重新发送给每个 eNodeB。由于 GUMMEI 列表较大,而且 eNodeB数量较多,所以必然会引起较多的信息在网络中传送, 增加网络中的信令流量, 即加重了网络的开销。 例如, 如果一个 Pool 中存在 10个 MME, 200个 eNodeB, 那么, 当相关的 LAC发生变动时, 则需要每个 MME向每个 eNodeB发送 MME CONFIGURATION UPDATE消息, 这也就意 味着将会有 2000个 CONFIGURATION UPDATE消息在 S1接口上传送,并且, 每个消息中都包含所有的 GUMMEI 列表(更新的和未更新的都需要发送)。 为了避免该情况, 本发明实施例还可以采用如下的配置方法。
( 1 ) 为了减小 SI SETUP RESPONSE消息或 MME CONFIGURATION UPDATE消息等配置消息的大小, 使得 SI SETUP RESPONSE消息或 MME CONFIGURATION UPDATE消息等配置消息中无需携带大量的 GUMMEI列
表, 可以将 GUMMEI进行分解, 然后对 GUMMEI的各组成部分分别形成的 列表进行发送, 即 MME发送的关于 LAC列表的配置消息给 eNodeB, 所述关 于 LAC列表的配置消息中携带 PLMN-id列表、 MMEGI列表和 MMEC列表, 具体如下:
由于针对 Pool中的每个 LAC , MME都会形成一个相应的 GUMMEI , 所 以, eNodeB配置 LAC列表实际上也可以看成是,在 eNodeB上配置 GUMMEI 列表, 由于 GUMMEI由 PLMN-id+MMEGI+MMEC组成,所以如果 GUMMEI 是通过映射方法形成, 则 GUMMEI实际上的值为 PLMN-id+LAC+NRI。 一般 来讲 MMEC和 NRI的值是相同,而 PLMN-id的值也是相同的,因此, GUMMEI list 中存在大量相同内容。 由此, 如表二所示, 可以将 GUMMEI 列表改为 PLMN-id ( 即表中的 PLMN Identity ) /PLMN-id list+ MMEGI list + MMEC/MMEC list的形式,其中, PLMN-id list指的是 PLMN-id列表, MMEGI list指的是 MMEG列表, MMEC list MMEC列表;
通常情况下, GUMMEI列表中的 PLMN-id和 MMEC的值是相同的, 只 有 MMEGI的值是不同的, 因此将 GUMMEI列表改成 PLMN-id + MMEGI list + MMEC的形式进行发送能够节省大量重复的 PLMN-id和 MMEC的发送,当 然在支持多 PLMN的情况下, PLMN-id还能可以改为 PLMN-id list, 同理, MMEC也可以改为 MMEC list方式。 当 eNodeB收到该更改后的列表后,保存 并自行根据表中的 PLMN-id、 MMEGI list 以及 MMEC 等信息组合成 GUMMEI列表, 由此完成对 LAC列表的配置。
例如, PLMN-id目前是 3个 byte, MMEGI是 2个 byte, MMEC是 1个 byte。如果一个 MME Pool支持 3个 PLMN, MME Pool需要配置 100个 MMEGI 和一个 MMEC,其中, 100个 MMEGI中包括 1个真正的 MMEGI和 99个 LAC 映射后的 MMEGI )。 那么如果按原来的配置方法, GUMMEI list的大小是: 3*100* ( 3+2+1 ) =1800 byte。而用本方法,现在的 GUMMEI list由 PLMN-id list 和 MMEGI list和 MMEC list组成, 占用的大小为: 3*3 (PLMN-list ) +100 * 2 (MMEGI list) + 1 *1 (MMEC list) = 210 byte。 可以看出, 现有的 GUMMEI list 占用空间大大减少。
方法( 2 )为了解决当 LAC或 GUMMEI发生变动时, MME需要向 eNodeB 发送所有 GUMMEI列表而引起过多的信息在网络中传送的问题, 本发明实施 例提出, 当 LAC或 GUMMEI变动时, MME向 eNodeB发送指示消息, 所述 指示消息指示 eNodeB添加 /修^删除 LAC列表中的 GUMMEI,例如在 MME 向 eNodeB发送的 MME CONFIGURATION UPDATE消息中携带一个指示,在 指示中表明 LAC或 GUMMEI的变动情况, 即是添加一个或几个 GUMMEI还 是修改了 GUMMEI 还是删除了 GUMMEI 等等。 修改后的 MME CONFIGURATION UPDATE消息可以 三;
IE/Group Name Presence Range IE type and
(信息元素名称) (是否可选) (范围) reference
(参考值)
Message Type M (必选 )
(消息类型)
MME Name 0 (可选) OCTET ( MME名称 ) STRING
Served PLMNs O.xmaxnoofPLMNsPe
(服务 PLMN列表, 文 r MME>
中筒称 PLMN列表) ( 0到 MME支持的
PLMN最大数个)
>PLMN Identit M (必选 )
( PLMN值 )
Served GUMMEIs O.xmaxnoofGUMMEI
(服务 GUMMEI列表,文 s>
中筒称 GUMMEI列表) ( 0到 MME支持的
GUMMEI最大数个 )
>original GUMMEI 0 (可选)
(原来的 GUMMEI值)
>new GUMMEI 0 (可选)
(新的 GUMMEI值)
>behavior 0 (可选) <add, modify,delete>
(动作) (添加, 修改, 删除)
Relative MME Capacity 0 (可选)
( MME相对能力)
当然, 也可以直接在消息中指示添加、 或删除、 或修改 GUMMEI, 而不 当 MME需要添加一个 GUMMEI时,则可以发送 MME CONFIGURATION UPDATE ( new GUMMEI, behavior='add' ) 消息给 eNodeB , 其中, " new GUMMEI"表示需要添加的 GUMMEI的标识(ID, Identity ), "behavior='add',, 则是表示需要在原有的 LAC列表中添加 GUMMEI, "behavior"是一种信息元 素 (IE, Information Element ), 它的值表明具体的动作, 这样, 当 eNodeB收 到该 MME CONFIGURATION UPDATE ( new GUMMEI, behavior='add' ) 消息 后, 就在原有 LAC列表中添加一个 GUMMEI;
当 MME要删除一个 GUMMEI时, 则可以发送 MME CONFIGURATION
UPDATE ( GUMMEI, behavior='ddete' ) 消息给 eNodeB, 其中, "GUMMEI" 表示要删除原有的 LAC列表中的 GUMMEI的 ID, "behavior='delete',,表示需 要删除 GUMMEI, 当 eNodeB接收到该消息后, 根据该消息在原有的 LAC列 表中删除相应的 GUMMEI ;
当 MME要爹改一个 GUMMEI时, 则可以发送 MME CONFIGURATION
UPDATE ( new GUMMEI, GUMMEI, behavior='modify' )消息给 eNodeB,其中, " behavior='modify' " 表示需要修改原有的 LAC 列表中的 GUMMEI , "GUMMEI" 表示需要修改的 GUMMEI的 ID, "new GUMMEI" 则是表示需 要改成的 GUMMEI的 ID, 即 "GUMMEI" 在原有的 LAC列表中所对应的 GUMMEI的 ID要改为 "new GUMMEI"。
当然, 也可以不携带 " behavior " 这样的 IE , 例如可以通过 "updated GUMMEI"和' 'new GUMMEI"来表明动作, 即 "更新 GUMMEI" 和 "新的 GUMMEI" , 其中, "updated GUMMEI"表示要更新原来的 GUMMEI, new GUMMEI表示需要添加新的 GUMMEI; 这样, 如果 updated GUMMEI没有值 或没有被携带, 而 new GUMMEI=5, 则表示要添加一个 id为 5的 GUMMEI; 如果 updated GUMMEI=5 , 而 new GUMMEI没有值或没有被携带, 表示将删 除 id为 5的那个 GUMMEI; 如果 updated GUMMEI=5, 而 new GUMMEI=10, 表示要修改 GUMMEI等于 5的那个 GUMMEI改为 10。
( 3 ) 当然, 为了进一步减少当 LAC或 GUMMEI发生变动时, MME发 送给 eNodeB的消息的数量, 减少 MME和 eNodeB之间的信令流量, 还可以 采取另一种方法, 如下:
将所有的配置信息都集中在一个预置的中心节点上,该中心节点可以是预 置的 eNodeB, 也可以是预置的 MME等等, 该中心节点具有所有 MME配置 信息, 若某个 MME的配置信息发生改变, 则由该中心节点向所有的 eNodeB 发送配置消 息, 比如发送 SI SETUP RESPONSE 消息或 MME CONFIGURATION UPDATE消息。 因此, 当该中心节点需要向 eNodeB发送 配置信息时, 将发送所有 MME的配置信息。 比如 SI SETUP RESPONSE消息 或 MME CONFIGURATION UPDATE消息中的 GUMMEI list不是一个 MME 的 GUMMEI list, 而是所有 MME的 GUMME list, 当然, 为了实现该方法, 需要对 SI SETUP REPONSE消息进行修改, 爹改后的 SI SETUP REPONSE 消息如表四所示;
表四:
IE/Group Name Presence Range
(信息元素名称) (是否可选) (范围)
Message Type (消息类型 ) M (必选 )
GUMMEI ( MMEI列表, 以 1.. <maxnoofMMEper MME GUMMEI为索引 ) Pool>
( 1到 Pool内 MME最大个数 )
> MME Name ( MME名称 ) M (必选 )
> Mapped GUMMEI list
( GUMMEI列表)
> Relative MME Capacity M (必选 )
( MME相对能力 )
Criticality Diagnostics (诊断 ) 0 (可选)
表中的 "GUMMEI" 是每个 MME真正的 GUMMEI, 每个 MME只有一 个真正的 GUMMEI, 在此不考虑映射后的 GUMMEI, MME使用该真正的 GUMMEI作为唯一标识, 将所有的 MME的信息集中在一起, 形成 MME list , 该 MME list中的每个 MME都具有一些具体配置信息, 比如 MME的名字, 能力, 还有映射的 GUMMEI list等等, 其中, GUMMEI list可能是( PLMN-id + MMEGI + MMEC) list, 也可能是 PLMN-id list + MMEGI list + MMEC list, 也可能不存在该映射的 GUMMEI list。
总之, 就是由该中心节点通过一条配置消息向 Pool内的 eNodeB提供该 MME Pool中所有 MME的配置信息,这样,当 LAC或 GUMMEI发生变动时, 就只需要该中心节点向每个 eNodeB 发送一个 MME CONFIGURATION UPDATE消息即可, 无需每个 MME向每个 eNodeB发送, 从而减少了网络中 传送的消息的数量。例如 MME Pool存在 10个 MME, 200个 eNodeB,当 LAC 发生变动时, 就只需要该中心节点向 200个 eNodeB发一个总的关于配置发生 变动的配置消息, 消息数量只有 200个, 当然, 在此之前, MME可能还需要 向该中心节点发送自身的配置消息。
以上(1 ) ( 2 ) ( 3 )三种方法可以独立使用, 也可以结合使用, 当然, 结 合使用会更加优化, 如(1 )方法和(2 )方法结合, 那么, 当有 10个 LAC被
添加时, MME就只需更新这 10个 LAC的信息, 然后发送 PLMN-id list + 10 个 LAC映射后的 MMEGI + MMEC给 eNodeB,在不支持多个运营商的核心网 节点的情况下,该发送给 eNodeB的消息的大小就只有 3+20+1=24 byte。否贝,J , 如果只使用 (1 )方法, 虽然消息的大小减小了, 但消息的数量还是没有改变, 即还是需要发送所有 GUMMEI信息(包括未更新的)给 eNodeB; 如果只使 用 (2 ) 方法, 虽然消息的数量有所减少, 但是消息的大小仍为 6*10=60byte, 显然比上述将(1 )方法和(2 )方法结合后的消息的大小, 即 "24 byte" 大许 多。 当然(3 )方法也可以和(1 )方法或(2 )方法结合, 甚至全部结合起来, 在此不再赘述。
需说明的是, 本实施例是以网络侧节点是 eNodeB为例进行说明的, 所述 网络侧节点也可以为所述中心节点, 也就是说, 本实施例中 eNodeB所执行的 操作也可以由该中心节点来完成,例如该中心节点也可以作为选择 CN节点的 节点, 即, 该中心节点与每个 eNodeB相连, 当 UE接入 eNodeB时, eNodeB 不选择 CN节点, 而是把消息发送到该中心节点, 由该中心节点来选择 CN节 点, 例如 MME。 这样, 就只需要将 MME的配置信息配置到该中心节点即可, 而不需要发送到 eNodeB,也就是说,每个 MME在 S1建立或配置信息改变时, 即 LAC或 GUMMEI发生变动时, 只需要和该中心节点进行信息交互即可。 例如 MME Pool存在 10个 MME, 200个 eNodeB, 当 LAC发生改变时, 10 个 MME只需要向该中心节点发送关于配置发生变动的配置消息,消息数量只 有 10个, 而不需要向 200个 eNodeB发送关于配置发生变动的配置消息, 大 大减少了网络中信息传送的数量。
实施例一的有益效果: 实施例一通过对于 UE接入时的标识进行区分, 获 取 UE标识的信息, 确认该信息是网络分配的信息还是网络对该 UE的信息映 射后的信息, 并根据上述区分, 为 UE选择合适的网络节点, 避免了 UE由于 改变 RAT而无法接入到对应 CN节点。
实施例二、
实施例一所描述的方法都是当 UE携带 2G/3G标识接入 SAE/LTE网络时, 按照 UE当前驻扎的小区不处于注册的跟踪区(TA, Tracking Area ) 中的情况 进行接入的, 在实施例一所描述的方法中, 如果 UE当前驻扎的小区处于注册
的 TA中, 则在 RRC连接建立完成( RRC Connection Setup Complete )消息中 的 NAS部分, 例如 TAU Request消息的 NAS部分(以下均称 RRC连接建立 完成消息的 NAS部分为 NAS消息)可以不携带 UE标识(UE-id ), 如 GUTI 或 P-TMSI或 IMSI等信息, 即 UE可以根据当前接入的 TA是否在自身的 TA 列表( TA list ) 内来决定在 NAS消息中是否携带 UE标识。
也就是说, 若 NAS消息中携带 UE标识, 一般则认为 UE当前驻扎的小 区不处于注册的 TA中, 而实际上, 如果在 NAS消息中携带 UE标识, 那么也 可以按照 UE当前驻扎的小区处于注册的 TA中的情况进行接入, 比如当 UE 携带 2G/3G 网络的标识接入 SAE/LTE 网络时的 NAS 消息只能是附着请求 ( Attach Request ) 消息或跟踪区更新请求( TAU Request ) 消息, 那么, 只要 这两个消息总是携带 UE标识, 则即使选择的 MME没有 UE上下文, 该选择 的 MME也可以通过 UE标识找到旧节点获取 UE上下文, 或者向 HSS获取 UE上下文。 为此, 本实施例提供了另一种接入方法。
为了描述方便, 以下将把 UE当前驻扎的小区不处于注册的 TA中这种情 况称为 TA not registered case,反之,若 UE当前驻扎的小区处于注册的 TA中, 则称为 TA registered case。 需说明的是, 为了更好地描述本实施例所提供的技 术方案, 以下将对 TA registered case和 TA not registered case技术作筒单地介 绍, TA Registered case和 TA not registered case是 UE携带 SAE分配的标识接 入 SAE时的技术。
当 UE进入一个 SAE Pool并使用 SAE分配的临时标识发起接入时, UE 判断当前接入的小区是否属于 UE的注册区域, 即 UE检测自身当前驻扎的小 区是否处于注册的 TA中, 若是, 则空闲 (idle )模式的 UE接入 SAE/LTE网 络发起的 RRC连接建立请求( RRC Connection Request )消息中携带 S-TMSI, 由于在这种情况下 UE—定没有移动出原来的 Pool区域, 因此, eNodeB可以 通过 S-TMSI中的 MMEC直接选择到原来的 MME (在 MOCN情况下, 还要 根据 UE携带的选择的 PLMN-id信息结合来选择 MME ), 在接收到 eNodeB 返回的携带有 S-TMSI的 RRC连接建立消息后, 为了减小消息的大小, 节省 占用的带宽, 在随后 UE发送给 eNodeB的 RRC连接建立完成消息中的 NAS 消息里可以不携带 UE标识,在 RRC连接建立完成消息中的 RRC部分也不携
带 GUMMEI, 在 eNodeB选择了 MME后, eNodeB发送初始 UE消息给选择 到的 MME, 然后 MME根据 S-TMSI获取 UE的上下文, 其中, 初始 UE消息 包括 UE发起的 RRC连接建立请求中的 S-TMSI以及 RRC连接建立完成消息 中的 NAS消息等信息; 若否, 即 UE检测自身当前驻扎的小区不处于注册的 TA中时, 则空闲 idle模式的 UE接入 SAE/LTE网络发起的 RRC连接建立请 求消息中携带一个随机数 ( Random ID ) , 然后接收 eNodeB返回的携带有随机 数的 RRC连接建立消息, 由于在这种情况下 UE可能移动出原来的 Pool区域 也可能没有移动出原来的 Pool区域, 所以之后 UE在发送给 eNodeB的 RRC 连接建立完成消息中的 NAS消息里需要携带 UE的标识, 同时在 RRC连接建 立完成消息中的 RRC部分携带 GUMMEI,这样 eNodeB就可以通过 GUMMEI 来查找对应的 MME (在 MOCN情况下, eNodeB是根据 UE携带的选择的 PLMN-id和 GUMMEI中的 MME Group ID和 MMEC来选择 MME的;), 如果 存在对应的 MME (原来的 MME ), 则直接选择到原来的 MME, 如果不存在 对应的 MME,则说明 UE已经更换了 Pool,那么 eNodeB选择一个新的 MME, 然后再发送初始 UE消息给选择到的 MME, 由该选择到的 MME获取 UE的 上下文, 其中, 初始 UE消息包括 NAS消息等信息。 可参见图 9和图 10, 图 9为 UE使用 TA registered case接入 SAE/LTE网络的方法流程图,图 10为 UE 使用 TA not registered case接入 SAE/LTE网络的方法流程图。
本实施例提供的接入方法是: 当 UE携带 2G/3G的标识接入 SAE系统, UE首先将 2G/3G的标识映射为 SAE的标识格式, 然后按照 TA registered case 进行接入, 即 UE在发起的 RRC连接建立请求( RRC Connection Request ) 消 息中携带映射的 S-TMSI, 而在随后的 RRC 连接建立完成消息中的 RRC部分 不携带 GUMMEL 而在 RRC连接建立完成消息中的 NAS消息里可以总是携 带 UE标识, 这时 eNodeB可以在向 MME发送的初始 UE消息(第一条 Initial UE Message ) 中不携带 S-TMSL 也可以是, UE判断当前接入的小区是否处 于注册的 TA中,如果是, 则在 RRC 连接建立完成消息中的 NAS消息里总是 不携带 UE标识, 如果否, 则在 RRC连接建立完成消息中的 NAS消息里携带 UE标识。
当然, 在 UE接入系统架构演进网络 SAE前, UE也可以对接入时使用的
UE标识是 SAE分配的还是映射的进行判断, 如果所述 UE标识是映射的, 才 执行以上方法所述的动作,即执行 UE在发送给 eNodeB的 RRC连接建立请求 消息中携带映射的 S-TMSI,在发送给 eNodeB的 RRC连接建立完成消息中不 携带 GUMMEI的步骤; 否则, 如果所述 UE标识是 SAE分配的, 则判断 UE 接入的区域是否属于 UE的注册区域,若 UE接入的区域属于 UE的注册区域, 则执行 TA registered case接入, 若 UE接入的区域不属于 UE的注册区域, 则 执行 TA not registered case接入,可参见本实施例中 TA registered case和 TA not registered case的相关描述, 在此不再累赘。
需说明的是, 由于 eNodeB 需要区分 RRC 连接建立请求消息携带的是 S-TMSI还是随机数, 因此需要定义一个标识在 S-TMSI和随机数中, 比如将 该标识命名为 Distinguishing Mark, 定义其大小为 8bit, 若 8bit上的数全为 1 , 则确定 RRC连接建立请求消息携带的是随机数, 若 8bit上的数不全为 1 , 则 确定 RRC连接建立请求消息携带的是 S-TMSL 该 Distinguishing Mark位于 S-TMSI的 MMEC部分以及随机数的前 8bit。
由于 UE携带映射的标识接入 SAE时, S-TMSI中的 MMEC部分是由 NRI 映射而来, 而 NRI可能是全 1的, 这样 eNodeB会误认为收到的是随机数, 因 此, 需要定义 NRI不能为全 1。
当然, UE也可以不需要对当前接入的小区是否属于 UE的注册区域进行 判断, 或者不需要对自身携带的 UE标识是 SAE分配的还是映射的进行判断, 而是总是使用 TA Registered Case, 即在发送给 eNodeB的 RRC连接建立请求 消息中总是携带 S-TMSI, 然后无论在何种情况下,在 RRC连接建立完成消息 中的 NAS消息总是携带 UE标识, 而且在 RRC连接建立请求消息中携带的 S-TMSI只是用来供 eNodeB选择 MME,而不必在随后的 S1接口上将 S-TMSI 带上, 即 eNodeB向 MME发送的初始 UE消息中不携带 S-TMSI信息, 从而 可以减小消息的流量大小, 节省占用的带宽, 但是, 该方法的不足在于, 当 UE更换 Pool时, 如果新的 Pool也存在相同编号的 MMEC, 则 eNodeB直接 在新的 Pool中选择该具有相同编号的 MMEC所对应的 MME, 而不会通过负 载均衡(Load Balancing )等原则选择一个新的 MME。 或者, 也可以总是使用 TA not registered case接入 SAE/LTE网络, 即 UE在发送给 eNodeB的 RRC连
接建立请求消息中总是携带随机数, 在随后的 RRC连接建立完成消息的 RRC 部分携带 GUMMEI, 在 RRC连接建立完成消息的 NAS消息中携带 UE标识, 但这样 UE发起服务请求(Service Request ) 的过程不会太快, 因为服务请求 消息一般会限制长度, 以便尽快地发起接入。
需说明是, 以上只是以 RAN节点为 eNodeB , CN节点为 MME为例进行 说明, 该 RAN节点还可以为与 eNodeB具有类似功能的其它设备, CN节点也 可以为具有与 MME具有类似功能的其它设备。
实施例二的有益效果: 实施例二通过 UE发起的 RRC连接建立请求消息 中携带 S-TMSI, 然后通过 S-TMSI为 UE选择合适的 CN节点, 避免了 UE由 于改变 RAT而无法接入到对应 CN节点的情况, 与此同时, 本实施例通过在 RRC连接建立完成消息中不携带 GUMMEI等方法, 减小了消息的流量大小, 节省占用的带宽。
实施例三、
本实施例通过设置区分 LAC和 MMEGI, 例如设置 LAC 中的 bit位与 MMEGI中对应的 bit位的数值不同, 可以区分 LAC和 MMEGL 本实施例提 出当 UE通过 GUTI接入 MME, 具体接入方式可包括附着 attach或 TAIL 如 果 MME存在 UE上下文( UE Context ), 则 MME通过 GUTI找到 UE, 否则, MME通过 GUTI 中的 GUMMEI查到 old MME, 例如可通过域名解析系统 ( DNS, Domain Name System ) 查找 old MME, 并向 old MME发送上下文请 求 ( Context Request ) , 该上下文请求中包含 GUTI 或发送标识请求 ( Identification Request ), 该标识请求包含 GUTI, old MME通过 GUTI找到 UE Context, 返回 UE Context或 UE的 IMSI信息等给 MME。 而当 UE通过 old RAI/P-TMSI或 TLLI映射后的 GUTI接入 MME, MME或 DNS需要根据 网络为 UE分配的 GUTI——例如 SAE为 UE分配的 GUTI——与映射的 GUTI 的区分。如获知 GUTI为映射的 GUTI,则还原 GUTI为 old RAI/P-TMSI或 2G 网络的 TLLI/old RAI (如果 old SGSN是 2G SGSN )„ 通过 old RAI或者通过 old RAI和 NRI找到 old SGSN,向 old SGSN发送 Context Request ,该 Context Request 包含 old RAI, P-TMSI 或 TLLI , 或发送验证请求 (Identification Request ), 该 Identification Request包含 old RAI, P-TMSI或 TLLI。 old SGSN
通过 old RAI和 P-TMSI,或者 old GGSN通过 TLLI找到 UE context,返回 UE Context或 UE的 IMSI信息给 MME。
请参阅图 2, UE发送跟踪区更新请求, 即 TAU Request消息到 MME, 该 TAU Request消息包含 GUTI, MME检查 GUTI是真正 GUTI, 即 SAE网络侧 分配给 UE的真正 GUTI, 还是映射后的 GUTI, 如果是真正 GUTI, 则 MME 向 old MME发送 Context Request,该 Context Request携带( GUTI , complete TAU Request message )来向 old MME获取上下文, old MME通过 GUTI查找 UE Context, complete TAU Request message是 UE发送的 TAU Request消息, 如 果该消息有完整性保护, 则携带该消息给 old MME, 用以 old MME来检查完 整性保护, 如果验证成功, 则返回 UE上下文给 new MME。 如果 MME检查 GUTI是映射后的 GUTI,则 MME向 old SGSN发送 Context Request ( old RAI, P-TMSI or TLLI ), old SGSN根据 old RAI和 P-TMSI或 TLLI查找 UE Context。
其中, 关于安全完整性保护问题, 当 UE通过映射后的 GUTI接入 SAE 系统时, 可以采用以下几种方式:
1.由于 old SGSN没有 SAE的完整性保护参数,因此 MME可以根据 GUTI 是映射后 GUTI不发送 TAU Request消息给 old SGSN。
或者
2. MME不管 GUTI是否是映射后的标识, 始终给 old节点, 如 old SGSN 发送 TAU Request消息要求验证, 但是 old SGSN不对该消息进行验证, 返回 没有验证成功或没有验证的信息给 MME, 使得 MME执行安全相关过程, 如 果 MME中没有 UE上下文, 例如附带全球唯一临时标识( Additional GUTI ) 指示的是其他 MME, 可以由其他 MME执行安全相关过程, 或者 MME根据 Additional GUTI找到自身保存的 UE上下文, 对 UE进行安全验证, 或者, MME向 UE发起安全认证过程。
或者
3. UE携带 Additional GUTI正好指示 UE在接入的 MME有 UE上下文, 则接入的 MME对 UE进行安全验证, 如果通过安全 ^ 证, 则向 old SGSN发 送的 Context Request或 Identification Request中携带 UE已验证的信息。
或者
4.如果 Additional GUTI指示到其他 MME, 则新的 MME向 Additional GUTI指示的 MME获取安全上下文, 新的 MME根据获取的安全信息对 UE 进行验证; 或者 new MME将附着请求( Attach Request ) 消息或 TAU Request 消息发给 Additional GUTI指示的 MME进行验证。
或者
5.如果 UE携带映射后的 GUTI接入时, UE不对 TAU Request消息或 Attach Request消息等消息进行完整性保护。
或者
6. 如果 UE携带映射后的 GUTI接入时, UE携带 SGSN给它分配的 P-TMSI Signature字段, 发给网络, MME收到后, 将 P-TMSI Signature字段发 给 old SGSN进行 UE的验证。 即如果 UE携带 old RAI/P-TMSI或 TLLI映射 的 GUTI接入 SAE,则 UE携带 P-TMSI Signature信元,并且 MME向 old SGSN 发送的 Context Request消息也携带 P-TMSI Signature信元, 请求 old SGSN对 UE进行验证。
以上安全问题同样可以应用到下面的 UE携带映射后的 GUTI接入 SAE 系统的实施例中或 UE携带映射后的 old RAI/P-TMSI (或 TLLI ) /P-TMSI Signature接入 2G/3G的实施例中 ( MME和 SGSN需要调换位置)。
实施例四、
与实施例三的不同之处在于, MME 直接对 GUTI 进行映射。 本实施例 MME将 GUTI映射或还原为 old RAI/P-TMSI (或 TLLI ) /P-TMSI Signature或 old RAI/P-TMSI, 或者其中的 P-TMSI 也可以为 TLLI 的形式, 通过 old RAI/P-TMSI (或 TLLI ) /P-TMSI Signature的形式向 old实体, 例如 old MME 或者 old SGSN获取上下文,如果是 old MME时, old MME将 old RAI/P-TMSI 映射或还原为 GUTI获取 UE Context; 如果是 old SGSN, old SGSN直接根据 old RAI/P-TMSI (或 TLLI ), P-TMSI Signature找到 UE Context, 可参见图 3。
实施例五、
与实施例三的不同之处在于, 本实施例中, 判断是映射的 GUTI之后, 根 据对应的 old SGSN是 S4 SGSN还是 Gn/Gp SGSN, 进行不同的操作。 本实施 例通过接入节点了解 old节点是 MME/S4-SGSN还是 Gn/Gp SGSN来进行不同
操作。 如当 UE通过 old RAI/P-TMSI映射后的 GUTI接入 MME, 具体接入方 式可以是 Attach (附着)或 TAU方式。 如果 MME获知 old SGSN是支持 S4 的 SGSN, 例如根据查询 DNS , 或者根据其接口为基于 GTP-v2的接口来获知 old SGSN是支持 S4的 SGSN,那么 MME向 old SGSN发送 Context Request , 该 Context Request GUTI 包含 GUTI , 或发送 Identification Request , 该 Identification Request包含 GUTI, 由 old SGSN根据 GUTI的区分, 还原 GUTI 为 old RAI, P-TMSI, 或者还原为 old RAI, P-TMSI TLLI , 通过 old RAI和 P-TMSI, 或者 old RAI和 /或 TLLI找到 UE context, 返回 UE Context或 IMSI 等给 MME; 如果 MME获知 old SGSN是支持 Gn/Gp的 SGSN, 例如根据查 询 DNS ,或者根据其接口为基于 GTP-vl或 νθ的接口来获知 old SGSN是支持 Gn/Gp的 SGSN,如 3GPP R8版本定义之前的 SGSNPre-R8 SGSN,那么 MME 还原 old RAI/P-TMSI (或 TLLI ),向 old SGSN发送 SGSN Context Request (old RAI, P-TMSI或 TLLI)或 Identification Request ( old RAI, P-TMSI或 TLLI ), old SGSN通过 old RAI和 P-TMSI (或 TLLI )找到 UE context, 返回给 MME。
请参阅图 4, 如果 UE在 SAE Attach时, UE的下次更新使用的临时标识
( TIN, Temporary Identity used in Next update )设置为 P-TMSI或 TLLI或 UE 上次在 2G/3G去附着 Detach使用的临时标识, UE需要使用 old RAI/P-TMSI, 其中 P-TMSI也可以为 TLLI映射后的 GUTI接入 SAE; MME收到该映射的 GUTI ,可以直接还原成 old RAI/P-TMSK或 TLLI )或者看 old SGSN是 S4 SGSN 还是 Gn/Gp SGSN, 如果 old SGSN是 S4 SGSN, UE可以通过 Identification Request ( GUTI, complete Attach Request message ) 向 S4 SGSN获取 IMSI和 上下文等, S4 SGSN将 GUTI还原为 old RAI/P-TMSI (或 TLLI )找到 UE上 下文并返回 IMSI等。如果 old SGSN是 Gn/Gp SGSN, MME使用还原后的 old RAI/P-TMSI (或 TLLI ) 向 old SGSN获取信息, 通过标识请求 Identification Request, 该标识请求中携带 old RAI/P-TMSI (或 TLLI )。 当然, 如果有接入 RAT分配的临时标识存在的话, UE在 Attach时也可使用接入 RAT分配的临 时标识, 而不管 TIN的指示, 如果没有接入 RAT的临时标识则使用另一 RAT 的临时标识, 或者如果各 RAT的临时标识都没有, 则使用 IMSI接入。 如果 GUTI是真正的 GUTI , 那么 Identification Request消息中可能要携带从 UE带
上来的完整的 Attach Request消息,用于 old MME进行完整性保护验证,如果 MME发现 GUTI是映射的 GUTI, 那么 MME不需要携带该 Attach Request消 息在发给 SGSN的 Identification Request消息中, 并且需要对 UE进行安全验 证。
关于安全相关问题, 如果 UE 携带的 Additional GUTI 或 Additional
RAI/P-TMSI指示 UE在本地存在上下文, 则 UE在本地进行完整性保护验证 等安全过程, 这样, 接入实体, 例如 MME或 SGSN, 就不需要向 TIN指示的 旧实体, 例如 old MME或 old SGSN, 要求进行完整性保护验证等, 而且如果 UE在本地已进行了完整性保护验证, 则接入实体在 Context Request 中携带 UE已验证信息, 旧实体就不必对 UE进行验证。 否则如果 UE在本地接入实 体没有 UE上下文, 当 TIN指示的旧实体与接入实体是同一 RAT, 那么接入 实体可以要求旧实体对 UE进行完整性保护验证, 例如接入实体将 UE发送的 消息发送给旧实体, 旧实体进行验证。 否则接入实体可以不要求旧实体对 UE 进行安全过程, 例如接入实体不将 UE发送的消息发送给旧实体, 或者, 接入 实体要求旧实体对 UE进行安全过程, 但如果旧实体无法验证 (如旧实体与接 入实体不是同一 RAT ), 则旧实体返回验证未通过或未完成验证等信息, 要求 接入实体自行对 UE进行验证。 此外, 如果 UE的 TIN指示的是 "P-TMSI"或
"TLLI" , 贝' J UE在 Attach或 TAU/RAU接入时需要携带 P-TMSI Signature, 用以进行 UE的安全验证, 即接入实体带给旧实体对 UE进行验证, 否则如果 UE 的 TIN指示的是 "GUTI" , 则 UE在接入 2G/3G 时需要携带 P-TMSI Signature, 因为 GUTI需要有部分信息映射到 P-TMSI Signature。
实施例六、
与实施例三的不同之处在于,实施例三中, UE通过 GUTI接入的是 MME, 在本实施例中, UE携带 old RAI/P-TMSI/P-TMSI Signature接入的是 SGSN, 其中 P-TMSI也可是 TLLI。 当 UE携带 old RAI/P-TMSI (或 TLLI ) /P-TMSI Signature接入 SGSN, SGSN或 DNS根据真正 old RAI/P-TMSI (或 TLLI ) /P-TMSI Signature与映射后的标识的不同——如 MMEGI与 LAC的 lbit不同 ——查到 old MME或 old SGSN。 SGSN可以始终通过 old RAI/P-TMSI/P-TMSI Signature形式向 old实体获取上下文,如果 old实体是 MME, SGSN向 old MME
发送 SGSN Context Request ,该 Context Request 包含 old RAI, P-TMSI/TLLI, P-TMSI Signature, old MME恢复 GUTI, 找到 UE Context, 返回 UE Context , 才艮据接口或 Context Request内容返回 EPS Context或 2G/3G Context„
请参阅图 5, UE通过发送 RAU请求消息,即通过 old RAI, P-TMSI/TLLI, P-TMSI Signature接入 SGSN, 如果 UE使用的是 GUTI映射的 old RAI, P-TMSI/TLLI, P-TMSI Signature接入,那么 SGSN找到 old MME地址,向 old MME发送 Context Request, 该 Context Request携带( old RAI, P-TMSI/TLLI, P-TMSI Signature ) 消息, old MME根据 old RAI, P-TMSI/TLLI, P-TMSI Signature还原 GUTI,找到 UE上下文并返回 UE Context。此外,由于 old MME 没有 P-TMSI Signature信息, 因此, 对 UE进行验证可以采用以下方法:
1. Old MME在返回的 Context Response中携带 UE安全未验证信息,例如 携带 'P-TMSI Signature mismatch'的 Cause值, 使得 SGSN重新验证 UE。
2. 或者, 如果 SGSN没有 UE上下文且 SGSN了解 TIN指示的 old RAI, P-TMSI/TLLI, P-TMSI Signature对应的 old节点是 old MME, 则 SGSN总会 对 UE进行验证,并且向 old MME发送的 Context Request携带 "MS Validated" 信息,表示 UE已通过验证。如果 SGSN有 UE上下文,其中,可通过 Additional RAI/P-TMSI找到 UE Context, 则 SGSN先行验证 UE, 如果险证成功, 则向 old MME发送的 Context Request携带 "MS Validated" 信息, 表示 UE已通过 验证。
实施例七、
与实施例六的不同之处在于, 实施例六中, 由 old MME 将 old RAI/P-TMSI/P-TMSI Signature还原成 GUTI, 其中 P-TMSI可以是 TLLI。在本 实施例中, 旧实体为 old MME时, 由 SGSN将 old RAI/P-TMSI (或 TLLI ) /P-TMSI Signature还原成 GUTI。 请参阅图 6, SGSN了解 old实体是 MME还 是 SGSN, 如果 old 实体是 MME, 则 S4 SGSN恢复 GUTI, 向 old MME发 送 Context Request (GUTI ) , old MME根据 GUTI找到 UE Context, 返回 UE Context o
安全问题同实施例三至六, 如果 SGSN本地有 UE上下文, 验证 P-TMSI Signature, 如果没有 UE上下文并且发现 old实体对应 MME, 则 SGSN总向
UE发起安全过程, 并且 SGSN还原 GUTI, 向 old MME请求 UE上下文。 接入节点可以自己区分临时标识是原始临时标识还是映射后的标识,也可 以通过 DNS , 由 DNS分析后反馈接入节点该临时标识是否是映射后的标识。 如果接入节点和 DNS 翻译的 old节点地址有误, 则翻译后的 old节点收到 Context Request后, 继续查找真正 old节点, 将消息中继给真正 old节点。
此外, 现有技术中, UE可能还会携带 Additional TMSI (附带临时标识), 即 UE接入 SAE时携带 Additional GUTI, 接入 2G/3G时携带 Additional old RAI/P-TMSI, 其中 P-TMSI也可是 TLLI, 该 Additional TMSI的作用是用来尽 量找到接入 RAT实体内的可能存在的 UE Context, 而使用 TIN指示的临时标 识获取上下文等, 这样能够直接合并获取的上下文到本 RAT 实体内的 UE Context, 否则接入 RAT需要根据获取的上下文中的 IMSI信息再查询是否本 RAT实体存在 UE Context, 然后再合并引起复杂性。 该 Additional TMSI实际 上在下面情况下可以不必携带, 以节省空口资源: 周期性位置更新 (Periodic TAU或 Periodic RAU )或切换过程中的 TAU或 RAU; 或 TIN指示的临时标 识与 Additional临时标识一致, 即 TIN指示的就是接入 RAT的临时标识; 或 UE在 Attach过程中存在接入 RAT的临时标识时。
采用本发明以上实施例, 明确了各个节点对临时标识的处理。 可以实现: 真正 GUTI和映射后的 GUTI有所区分; 真正 old RAI/P-TMSI (或 TLLI ) 与映射后的 old RAI/P-TMSI (或 TLLI )也有所区分。 如 LAC与 MMEGI中设 置一个 bit位, LAC始终为 0, MMEGI始终为 1。
当 UE使用 old RAI/P-TMSI映射的 GUTI接入 SAE, eNodeB通过区分知 道 UE使用 old RAI/P-TMSI接入,则尽量选择 NRI对应的 MME;或者 eNodeB 通过发现该 LAC是否有配置, 决定是否选择 NRI对应 MME或者重新 选择 MME。
当 UE通过 old RAI/P-TMSI映射后的 GUTI接入 MME, MME了解该
GUTI是映射的 GUTI, 还原 old RAI/P-TMSI/TLLI, 通过 old RAI和 NRI找到 old SGSN,向 old SGSN发送 Context Request,该 Context Request携带 (old RAI, P-TMSI/TLLI), old SGSN通过 old RAI和 P-TMSI/TLLI找到 UE context, 返 回给 MME。
或者, 当 UE通过 old RAI/P-TMSI映射后的 GUTI接入 MME, MME了 解该 GUTI是映射的 GUTI, MME查询 old SGSN是 S4 SGSN还是 Gn/Gp SGSN。 如果 old SGSN是 S4 SGSN, 那么 MME向 old SGSN发送 Context Request (GUTI), 即该 Context Request携带 GUTI, 或者发送 Identification Request, old SGSN还原 GUTI为 old RAI, P-TMSI/TLLI, 通过 old RAI和 P-TMSI/TLLI找到 UE context,返回给 MME;如果 old SGSN是 Gn/Gp SGSN, 那么 MME还原 old RAI/P-TMSI/TLLI, 向 old SGSN发送 Context Request , 该 Context Request携带 (old RAI, P-TMSI/TLLI), old SGSN通过 old RAI和 P-TMSI/TLLI找到 UE context, 返回给 MME。
Additional TMSI在切换 HO中的 TAU/RAU、 Periodic TAU/RAU、 TIN指 示的临时标识与 Additional临时标识一致时或 UE在 Attach过程中存在接入 RAT的临时标识时可以不需要。
当 Combined节点的 MME和 SGSN属于不同 PLMN, 或不同 PLMN的 MME和 SGSN建立 ISR时, UE可通过携带两个 PLMN-id或配置, 让 RAN 节点选择到对应的 CN节点。
通过区分 UE携带的标识是哪个 RAT分配的, RAN节点或接入节点能够 作相应合适的处理, 防止选择错误节点或发送不一致参数给对应节点。
本发明实施例还提供了一种为用户设备 UE分配网络资源节点的方法,该 方法包括:
网络侧获取用户设备 UE的所携带的临时标识的映射属性,
网络侧才艮据该临时标识的映射属性为 UE分配网络资源节点。
具体地, 网络侧获取用户设备 UE的所携带的临时标识的映射属性为网络 侧判断用户标识是网络侧分配的还是映射后的。
详细实现方式描述如下:
当用户设备 UE接入的网络侧为系统架构演进网络 SAE时, 该网络侧获 取用户设备 UE的所携带的身份标识的映射属性具体是: 该 SAE网络的演进 基站 eNodeB判断所述 UE携带的全球唯一移动性管理实体标识 GUMMEI/或 所述 GUMMEI中的移动性管理实体组标识 MMEGI是 SAE分配的还是映射 的;
如果所述 GUMMEI/或 MMEGI是 SAE分配的,则网络侧根据所述标识的 映射属性为 UE分配网络资源节点具体是: eNodeB根据 GUMMEI或者 MMEGI 和移动性管理实体编码 MMEC选择移动性管理实体 MME;
如果所述 GUMMEI或 MMEGI是映射的, 则网络侧根据标识的映射属性 为 UE分配网络资源节点具体是 eNodeB根据所述 GUMMEI中的移动国家码 MCC、 移动网络码 MNC和 MMEC选择 MME; 或者 eNodeB根据 GUMMEI 中的 MMEC选择 MME。
或者也可通过如下方式实现:
当用户设备 UE接入的网络侧为系统架构演进网络 S AE时, 网络侧获取 用户设备 UE的所携带的身份标识的映射属性具体是: SAE网络的移动性管理 实体 MME判断所述 UE携带的全球唯一临时标识 GUTI是 SAE分配的还是映 射的;
如果 GUTI是 SAE分配的,则网络侧根据所述标识的映射属性为 UE分配 网络资源节点前还包括, MME用 GUTI向旧移动性管理实体 old MME取 UE 的上下文;
如果 GUTI是映射的, 则网络侧根据标识的映射属性为 UE分配网络资源 节点前还包括, MME把所述 GUTI还原成旧路由区标识 old RAI/分组临时移 动用户标识 P-TMSI或者还原成 old RAI/逻辑链路临时标识 TLLI; 并用 old RAI/P-TMSI或者 old RAI/TLLI向旧服务通用分组无线业务支持节点 old SGSN 获取 UE的上下文。
对应前文方法实施例的表述, 本发明实施例还提供了一种用户设备 UE, 该 UE包括, 当 UE使用映射后的 GUTI接入 SAE系统, 则不对接入消息做完 整性保护。
请参阅图 7, 网络侧装置, 包括标识属性获取模块 701 , 用于区分 UE使 用映射后的临时标识还是真正的临时标识,真正的临时标识即网络侧分配的标 识; 该网络侧节点可以是无线接入网节点。
网络资源节点分配模块 702, 根据上述 UE的临时标识的属性, 即 UE是 网络侧分配的标识还是映射后的标识, 为 UE分配网络资源节点。 该网络资源 节点包 MME或者 SGSN或者 CN节点。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到本发明 可借助软件加必需的硬件平台的方式来实现, 当然也可以全部通过硬件来实 施。基于这样的理解, 本发明的技术方案对背景技术做出贡献的全部或者部分 可以以软件产品的形式体现出来, 该计算机软件产品可以存储在存储介质中, 如 ROM/RAM、 磁碟、 光盘等, 包括若干指令用以使得一台计算机设备 (可以 是个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例或者实施例 的某些部分所述的方法。
以上所述仅是本发明的具体实施方式,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
1、 一种接入的方法, 其特征在于, 该方法包括:
用户设备 UE接入系统架构演进网络 SAE时, 网络侧节点判断所述 UE 携带的全球唯一移动性管理实体标识 GUMMEI或所述 GUMMEI中的移动性 如果所述 GUMMEI或 MMEGI是 SAE分配的,所述网络侧节点根据所述 GUMMEI选择移动性管理实体 MME, 或者所述网络侧节点根据所述 MMEGI 和移动性管理实体编码 MMEC选择 MME, 或者所述网络侧节点根据选择的 公共陆地移动网络标识 PLMN-id和 MMEGI和 MMEC选择 MME;
如果所述 GUMMEI 或 MMEGI 是映射的, 所述网络侧节点根据所述
GUMMEI中的移动国家码 MCC和移动网络码 MNC和 MMEC选择 MME,或 者所述网络侧节点根据所述 GUMMEI中的 MMEC选择 MME,或者所述网络 侧节点根据选择的 PLMN-id和 GUMMEI中的 MMEC选择 MME。
2、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点判断 GUMMEI或 MMEGI是 SAE分配的还是映射的包括:
所述网络侧节点查看所述 GUMMEI中 MMEGI的标志位是 MMEGI的标 志还是位置区码 LAC的标志;
如果是 MMEGI的标志, 则判断 GUMMEI是 SAE分配的;
如果是 LAC的标志, 则判断 GUMMEI是映射的。
3、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点根据 所述 GUMMEI选择 MME包括:
如果 MME的 GUMMEI与所述 UE携带的 GUMMEI相同,则所述网络侧 节点选择该 MME; 或者,
所述网络侧节点查找 LAC列表,当所述 UE携带的 GUMMEI中的 MMEGI 属于所述 LAC列表之一, 则所述网络侧节点选择与所述 UE携带的 GUMMEI 中的 MMEC对应的移动性管理实体 MME。
4、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点根据 所述 GUMMEI中的 MMEGI和 MMEC选择 MME包括:
如果 MME 的 GUMMEI 中的 MMEGI 和 MMEC 与所述 UE携带的
GUMMEI中的 MMEGI和 MMEC分别相同,则所述网络侧节点选择该 ΜΜΕ; 或者,
所述网络侧节点查找 LAC列表,当所述 UE携带的 GUMMEI中的 MMEGI 属于所述 LAC列表之一, 则所述网络侧节点选择所述 UE携带的 GUMMEI 中的 MCC和 MNC和 MMEC对应的 MME。
5、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点根据 选择的公共陆地移动网络标识 PLMN-id和 MMEGI和 MMEC选择 MME包括: 如果 MME的 GUMMEI与所述 UE携带的选择的 PLMN-id和 MMEGI和 MMEC相同, 则所述网络侧节点选择该 MME; 或者,
所述网络侧节点查找 LAC列表,当所述 UE携带的 GUMMEI中的 MMEGI 属于所述 LAC 列表之一, 则所述网络侧节点选择与所述 UE携带的选择的 PLMN-id和 MMEC对应的 MME。
6、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点根据 所述 GUMMEI中的 MCC和 MNC和 MMEC选择 MME包括:
如果 MME的 GUMMEI中的 MCC和 MNC和 MMEC与所述 UE携带的
GUMMEI中的 MCC和 MNC和 MMEC分别相同, 则所述网络侧节点选择该 MME。
7、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点根据 所述 GUMMEI中的 MMEC选择 MME包括:
如果 MME的 GUMMEI中的 MMEC与所述 UE携带的 GUMMEI中的
MMEC相同, 则所述网络侧节点选择该 MME; 或者,
所述网络侧节点查找 LAC列表,当所述 UE携带的 GUMMEI中的 MMEGI 属于所述 LAC列表之一, 则所述网络侧节点选择所述 UE携带的 GUMMEI 中的 MMEC对应的 MME。
8、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点根据 选择的 PLMN-id和 GUMMEI中的 MMEC选择 MME包括:
如果 MME的 GUMMEI中的 MCC和 MNC与 UE携带的选择的 PLMN-id 相同,同时 MMEC 和 UE携带的 MMEC相同,则所述网络侧节点选择该 MME。
9、 根据权利要求 3、 4、 5或 7所述的接入方法, 其特征在于, 所述网络
侧节点查找 LAC列表之前还包括:
网络侧节点配置 LAC列表。
10、 根据权利要求 9所述的接入方法, 其特征在于, 所述网络侧节点配置 LAC列表具体为:
网络侧节点接收 MME发送的关于 LAC列表的配置消息, 所述关于 LAC 列表的配置消息中携带 GUMMEI列表, 或者, 所述关于 LAC列表的配置消 息中携带 PLMN-id列表、 MMEGI列表和 MMEC列表;
网络侧节点保存所述关于 LAC列表的配置消息。
11、 根据权利要求 10所述的接入方法, 其特征在于, 还包括: 当 LAC发生变动时, 网络侧节点接收 MME发送的指示消息, 所述 MME 发送的指示消息指示网络侧节点添加 /修改 /删除 LAC列表中的 GUMMEI; 网络侧节点根据所述 MME发送的指示消息添加 /修改 /删除 LAC列表中的 GUMMEI。
12、 根据权利要求 1所述的接入方法, 其特征在于, 所述网络侧节点包括 eNodeB或预置的中心节点。
13、 根据权利要求 12所述的接入方法, 其特征在于, 还包括:
若所述网络侧节点为 eNodeB, 那么, 当 LAC发生变动时, eNodeB接收 预置的中心节点发送的指示消息, 所述中心节点发送的指示消息指示 eNodeB 添加 /修^删除 LAC列表中的 GUMMEI;
eNodeB根据所述预置的中心节点发送的指示消息添加 /修改 /删除 LAC列 表中的 GUMMEI。
14、 一种接入的方法, 其特征在于, 该方法包括:
用户设备 UE接入系统架构演进网络 SAE时,移动性管理实体 MME判断 所述 UE携带的全球唯一临时标识 GUTI是 SAE分配的还是映射的;
如果所述 GUTI是 SAE分配的,所述 MME用所述 GUTI向旧移动性管理 实体 old MME获取 UE的上下文;
如果所述 GUTI是映射的, 所述 MME把所述 GUTI还原成旧路由区标识 old RAI和分组临时移动用户标识 P-TMSI, 用所述 old RAI和 P-TMSI向旧服 务通用分组无线业务支持节点 old SGSN获取 UE的上下文,或者,所述 MME
4巴所述 GUTI还原成 old RAI和逻辑链路临时标识 TLLI, 用所述 old RAI和 TLLI向 old SGSN获取 UE的上下文。
15、 根据权利要求 14所述的接入方法, 其特征在于, 所述 MME判断所 述 UE携带的 GUTI是 SAE分配的还是映射的包括:
所述 MME查看所述 GUTI中的移动性管理实体组标识 MMEGI的标志位 是 MMEGI的标志还是位置区码 LAC的标志;
如果是 MMEGI的标志, 则判断 GUTI是 SAE分配的;
如果是 LAC的标志, 则判断 GUTI是映射的。
16、 根据权利要求 14所述的接入方法, 其特征在于, 所述用所述 old RAI 和 P-TMSI向 old SGSN获取 UE的上下文,或者,所述用所述 old RAI和 TLLI 向 old SGSN获取 UE的上下文均包括:
如果所述 MME上有 UE的上下文,所述 MME对 UE接入 SAE时的请求 消息验证完整性保护;
如果验证通过, 所述 MME向所述 old SGSN发送上下文请求, 所述上下 文请求携带验证通过消息;
所述 old SGSN根据所述验证通过信息向所述 MME返回 UE的上下文。
17、 根据权利要求 14所述的接入方法, 其特征在于, 所述用所述 old RAI 和 P-TMSI向 old SGSN获取 UE的上下文包括:
根据附带全球唯一临时标识 Additional GUTI的指示,所述 MME向有 UE 的上下文的 MME发送 UE接入 SAE时的请求消息;
所述有 UE的上下文的 MME向所述 MME返回对所述请求消息的完整性 保护的验证结果;
如果验证通过, 所述 MME向所述 old SGSN发送上下文请求, 所述上下 文请求携带所述 old RAI和 P-TMSI和验证通过信息;
所述 old SGSN根据所述 old RAI和 P-TMSI和 3 证通过信息向所述 MME 返回 UE的上下文。
18、 根据权利要求 14所述的接入方法, 其特征在于, 所述用所述 old RAI 和 TLLI向 old SGSN获取 UE的上下文包括:
根据 Additional GUTI的指示,所述 MME向有 UE的上下文的 MME发送
UE接入 SAE时的请求消息;
所述有 UE的上下文的 MME向所述 MME返回对所述请求消息的完整性 保护的验证结果;
如果验证通过, 所述 MME向所述 old SGSN发送上下文请求, 所述上下 文请求携带所述 old RAI和 TLLI和验证通过信息;
所述 old SGSN根据所述 old RAI和 TLLI和验证通过信息向所述 MME返 回 UE的上下文。
19、 根据权利要求 14所述的接入方法, 其特征在于, 所述用所述 old RAI 和 P-TMSI向 old SGSN获取 UE的上下文包括:
根据所述 Additional GUTI的指示, 所述 MME向有 UE的上下文的 MME 获取安全上下文;
所述 MME根据所述安全上下文对 UE接入 SAE时的请求消息验证完整性 保护;
如果验证通过, 所述 MME向所述 old SGSN发送上下文请求, 所述上下 文请求携带所述 old RAI和 P-TMSI和验证通过信息;
所述 old SGSN根据所述 old RAI和 P-TMSI和险证通过信息向所述 MME 返回 UE的上下文。
20、 根据权利要求 14所述的接入方法, 其特征在于, 所述用所述 old RAI 和 TLLI向 old SGSN获取 UE的上下文包括:
根据所述 Additional GUTI的指示, 所述 MME向有 UE的上下文的 MME 获取安全上下文;
所述 MME根据所述安全上下文对 UE接入 SAE时的请求消息验证完整性 保护;
如果验证通过, 所述 MME向所述 old SGSN发送上下文请求, 所述上下 文请求携带所述 old RAI和 TLLI和验证通过信息;
所述 old SGSN根据所述 old RAI和 TLLI和验证通过信息向所述 MME返 回 UE的上下文。
21、 根据权利要求 14所述的接入方法, 其特征在于, 如果所述 GUTI是 映射的, 则 UE不对跟踪区更新请求消息或附着请求消息进行完整性保护。
22、 根据权利要求 14所述的接入方法, 其特征在于, 如果所述 GUTI是 映射的, 则 UE携带分组临时移动用户标识签名 P-TMSI Signature信元, 并且 MME向 old SGSN发送的上下文请求也携带 P-TMSI Signature信元, 请求 old SGSN对 UE进行验证。
23、 一种接入的方法, 其特征在于, 该方法包括:
用户设备 UE接入系统架构演进网络 SAE时,移动性管理实体 MME将所 述 UE携带的全球唯一临时标识 GUTI映射成旧路由区标识 old RAI和分组临 时移动用户标识 P-TMSI, 或者, MME将所述 UE携带的 GUTI映射成逻辑链 路临时标识 TLLI和分组临时移动用户标识签名 P-TMSI Signature信元;
所述 MME用映射后的 old RAI和 P-TMSI,或, TLLI和 P-TMSI Signature 信元向旧移动性管理实体 old MME或者旧服务通用分组无线业务支持节点 old SGSN获取 UE的上下文;
所述 old MME将所述 old RAI和 P-TMSI,或者, old RAI和 TLLI和 P-TMSI Signature还原成 GUTI, 并根据还原得到的 GUTI向所述 MME返回 UE的上 下文。
24、 一种接入的方法, 其特征在于, 该方法包括:
用户设备 UE接入系统架构演进网络 SAE时,
如果旧节点是 MME, 所述 MME用所述 GUTI向旧移动性管理实体 old MME取 UE的上下文;
如果旧节点是 Gn/Gp SGSN, 则所述 MME把所述 GUTI还原成旧路由区 标识 old RAI和分组临时移动用户标识 P-TMSI, 并用所述 old RAI和 P-TMSI 向旧服务通用分组无线业务支持节点 old SGSN获取 UE的上下文; 或者, 所 述 MME把所述 GUTI还原成逻辑链路临时标识 TLLI, 用所述 TLLI向 old SGSN获取 UE的上下文;
如果旧节点是 S4 SGSN,则所述 MME用所述 GUTI向 old SGSN获取 UE 的上下文; 所述 old SGSN把所述GUΉ还原成old RAI和P-TMSI, 并通过所 述 old RAI和 P-TMSI找到 UE的上下文后返回给所述 MME, 或者, 所述 old SGSN把所述 GUTI还原成 old RAI和 TLLI, 并通过所述 old RAI和 TLLI找 到 UE的上下文后返回给所述 MME。
25、 一种接入的方法, 其特征在于, 该方法包括:
用户设备 UE接入 2G/3G网络时,服务通用分组无线业务支持节点 SGSN 根据所述 UE携带的旧路由区标识 old RAI和分组临时移动用户标识 P-TMSI 查找对应的旧实体地址, 或者, SGSN根据所述 UE携带的逻辑链路临时标识 TLLI查找对应的旧实体地址, 向旧实体获取 UE的上下文;
如果所述旧实体是 old MME,所述 old MME还原所述 old RAI和 P-TMSI 为全球唯一临时标识 GUTI, 或, 所述 old MME还原所述 TLLI和分组临时移 动用户标识签名 P-TMSI Signature为 GUTI, 向所述 SGSN返回找到的 UE的 上下文。
26、 一种接入的方法, 其特征在于, 该方法包括:
用户设备 UE接入 2G/3G网络时,服务通用分组无线业务支持节点 SGSN 根据所述 UE携带的旧路由区标识 old RAI和分组临时移动用户标识 P-TMSI, 或, SGSN根据所述 UE携带的逻辑链路临时标识 TLLI和分组临时移动用户 标识签名 P-TMSI Signature是 2G/3G分配的还是映射的,查找对应的旧实体是 旧服务通用分组无线业务支持节点 old SGSN 还是旧移动性管理实体 old MME;
如果所述 UE携带的 old RAI和 P-TMSI是映射的, 或, 所述 UE携带的 TLLI和 P-TMSI Signature是映射的, 而且所述旧实体是 old MME, 则所述 SGSN根据所述 old RAI和 P-TMSI还原 GUTI, 或, 所述 SGSN根据所述 TLLI/P-TMSI Signature还原 GUTI, 并用 GUTI向所述 old MME获取 UE的上 下文; 所述 old MME将根据 GUTI找到 UE上下文并返回给 SGSN;
如果 UE携带的 old RAI和 P-TMSI是 2G/3G分配的,或, UE携带的 TLLI 和 P-TMSI Signature是 2G/3G分配的,且所述旧实体是 old SGSN,则所述 SGSN 用所述 old RAI和 P-TMSI向所述 old SGSN获取 UE的上下文,或,所述 SGSN 用所述 TLLI向所述 old SGSN获取 UE的上下文。
27、 一种获取用户设备 UE上下文的方法, 其特征在于, 该方法包括: 当下次更新使用的临时标识 TIN指示的临时标识与附加临时标识一致, 则用户设备 UE只携带 TIN指示的临时标识接入;
接入节点通过 UE携带的 TIN指示的临时标识找到 UE上下文。
28、 一种获取用户设备 UE上下文的方法, 其特征在于, 该方法包括: 在切换过程中的跟踪区更新或路由区更新, UE只需要携带本无线接入技 术 RAT系统的临时移动用户标识 TMSI或者不携带任何 TMSI , UE通过目标 侧建立好的连接找到 UE上下文。
29、 一种获取用户设备 UE标识的方法, 其特征在于, 该方法包括: 在用户设备 UE发起附着 Attach过程中,
如果 UE存在接入无线接入技术 RAT的临时标识, 则携带所述临时标识, 接入实体通过所述临时标识查找对应节点,获取 UE的国际移动用户标识 IMSI 和安全参数;
如果 UE不存在接入 RAT的临时标识, 但存在另一 RAT的临时标识, 则 携带所述另一 RAT的临时标识,接入实体通过所述另一 RAT的临时标识查找 对应节点, 获取 UE的 IMSI和安全参数。
30、 一种网络侧装置, 其特征在于, 包括如下模块,
标识属性获取模块, 用于获取当前接入网络侧的 UE的临时标识的属性, 所述 UE的临时标识的属性为, 所述 UE标识是网络侧分配的还是映射的; 网络资源节点分配模块, 根据所述 UE的临时标识的属性为 UE分配网络 资源节点。
31、 一种接入的方法, 其特征在于, 包括:
用户设备 UE接入系统架构演进网络 SAE 时, UE在发送给演进基站 eNodeB的无线资源控制协议 RRC连接建立请求消息中携带 SAE网络的临时 移动用户标识 S-TMSI,在发送给 eNodeB的 RRC连接建立完成消息中不携带 全球唯一移动性管理实体标识 GUMMEI;
eNodeB根据接收到的 S-TMSI选择对应的移动性管理实体 MME,如果没 有对应的 MME, 则 eNodeB选择一个新的 MME。
32、 根据权利要求 31所述的接入的方法, 其特征在于, 还包括: 所述发送给 eNodeB的 RRC连接建立完成消息中的非接入层 NAS消息携 带 UE标识。
33、 根据权利要求 32所述的接入的方法, 其特征在于, 还包括: eNodeB向选择的 MME发送的初始 UE消息中, 不携带 S-TMSI信息。
34、 根据权利要求 31所述的接入的方法, 其特征在于, 还包括:
UE判断当前接入的小区是否处于注册的跟踪区 TA中, 如果是, 则发送 给 eNodeB的 RRC连接建立完成消息中的 NAS消息不携带 UE标识。
35、 根据权利要求 31至 34中任一项所述的接入的方法, 其特征在于, 还 包括:
UE接入 SAE前, UE判断接入时使用的 UE标识是 SAE分配的还是映射 的;
如果所述 UE标识是映射的, 则发送给 eNodeB的 RRC连接建立请求消 息中携带映射的 S-TMSI, 则发送给 eNodeB的 RRC连接建立完成消息中不携 带 GUMMEL
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