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WO2017177940A1 - Core network selection method, apparatus and system - Google Patents

Core network selection method, apparatus and system Download PDF

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Publication number
WO2017177940A1
WO2017177940A1 PCT/CN2017/080417 CN2017080417W WO2017177940A1 WO 2017177940 A1 WO2017177940 A1 WO 2017177940A1 CN 2017080417 W CN2017080417 W CN 2017080417W WO 2017177940 A1 WO2017177940 A1 WO 2017177940A1
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WO
WIPO (PCT)
Prior art keywords
terminal
information
mme
base station
message
Prior art date
Application number
PCT/CN2017/080417
Other languages
French (fr)
Chinese (zh)
Inventor
刘静
高音
Original Assignee
中兴通讯股份有限公司
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Filing date
Publication date
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Publication of WO2017177940A1 publication Critical patent/WO2017177940A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • 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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • 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
    • H04W8/082—Mobility data transfer for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents

Definitions

  • the present invention relates to the field of communications, and in particular to a method, device and system for selecting a core network.
  • the Narrow Band Internet of Things (NB-IOT) technology is mainly used to improve indoor coverage. It is an IoT communication system with wide coverage, multiple connections, low speed, low cost, and low power consumption.
  • the data transmission in the NB-IOT system is divided into two modes: Control Plane Mode and User Plane Mode.
  • the former mainly passes the uplink and downlink.
  • the data is carried in a Network Attached Storage (NAS) Protocol Data Unit (PDU) for transmission.
  • NAS Network Attached Storage
  • PDU Protocol Data Unit
  • SRB Signal Radio Bearer
  • DRB Data Radio Bearer
  • the DRB needs to be established in addition to the SRB.
  • a context-suspended Suspend and resume Resume mechanism is introduced, that is, when the UE and the mobility management entity (Mobile Management Entity, MME for short) are completed.
  • the AS context of the UE may be suspended on the eNB side and the MME side by using a suspend mechanism; if data transmission needs to be performed between the subsequent UE and the MME, the Uu and S1 ports of the UE are quickly restored through the recovery process. connection.
  • the User Plane Mode mode is supported, and the User Plane Mode mode can also be supported for the common WB-EUTRAN UE. Because the mobility of the former terminal type is low, there are not many scenarios for cross-site recovery. However, for the latter, the terminal is an ordinary intelligent terminal and has mobility characteristics, so that it is easy to have a scenario of cross-cell and cross-site recovery in the station.
  • FIG. 1 is a schematic diagram of a recovery process in an NB-IOT station according to the related art.
  • the eNB firstly The context information of the UE saved in the eNB is searched according to the recovery identifier Resume ID in the request. If the search succeeds, the air interface is successfully restored, and then the context recovery process of the core network is performed.
  • 2 is a schematic diagram of a NB-IOT inter-station recovery process according to the related art. As shown in FIG.
  • a public land mobile network (Public Land Mobile Network, PLMN) selected by the UE changes for example, the PLMN of the source cell is
  • the target side does not support, but belongs to the EPLMN (equivalent PLMN) list of the UE.
  • the UE needs to perform the Tracking Area Undate (TAU) process first.
  • TAU Tracking Area Undate
  • the eNB does not know the new UE.
  • the selected target PLMN so that the MME selection cannot be performed according to the new PLMN, and the recovery process is performed only on the old MME, so that the subsequent NAS TAU process fails.
  • the target eNB does not know the target PLMN newly selected by the UE, and thus cannot be based on The new PLMN performs the MME selection, and only the old GUMMEI can be obtained from the X2 port UE context acquisition process, and the recovery process is performed on the old MME, so that the subsequent NAS TAU process fails.
  • the embodiment of the invention provides a method, a device and a system for selecting a core network, so as to at least solve the problem that a PLMN of a terminal in a cell changes in the related art, and the NAS TAU process often fails.
  • a method for selecting a core network including:
  • the base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information;
  • the base station searches for context information of the terminal, where the base station selects an MME, where the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station selects The latter MME performs the current recovery process of the terminal.
  • the base station searching for the context information of the terminal includes at least one of the following: the base station locally searches for a context message of the terminal, and the base station interacts with other base stations to search for a context message of the terminal.
  • the selecting, by the base station, the MME includes:
  • the MME in the context information of the terminal performs a current recovery process of the terminal
  • the base station initiates a selection process of the MME, and selects a new MME to perform the current process of the terminal.
  • the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
  • a method for selecting a core network including:
  • the terminal sends an air interface recovery request message to the base station, where the terminal initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: the selected public land network PLMN information, Registered mobility management entity MME information.
  • a device for selecting a core network, where the base station is located includes:
  • an obtaining module configured to obtain an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and information about the registered mobility management entity MME ;
  • a locating module configured to search for context information of the terminal, where the MME is selected if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station is based on the selection
  • the MME performs the current recovery process of the terminal.
  • the searching for the context information of the terminal includes at least one of the following: the searching module locally searches for a context message of the terminal, and the searching module interacts with other base stations to search for a context message of the terminal.
  • the selecting, by the searching module, the MME includes:
  • a finding module configured to determine whether the MME in the context information of the terminal supports information of the selected public terrestrial network PLMN;
  • the MME in the context information of the terminal performs a current recovery process of the terminal
  • the searching module starts the selection process of the MME, and selects a new MME to execute the current process of the terminal.
  • the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
  • a device for selecting a core network which is located in the terminal, includes:
  • the sending module is configured to send an air interface recovery request message to the base station, where the sending module initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: a selected public land network PLMN information, registered mobility management entity MME information.
  • a core network selection system including: a base station and a terminal;
  • the base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information. ;
  • the base station searches for context information of the terminal, where the base station selects an MME, where the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station selects The latter MME performs the current recovery process of the terminal.
  • a storage medium is also provided.
  • the storage medium is arranged to store program code for performing the following steps:
  • the MME performs the current recovery process of the terminal.
  • the base station acquires the air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, the registered mobility management entity MME Information; the base station searches for context information of the terminal, and if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, the base station selects the MME, wherein the base station is based on the selected MME.
  • the current recovery process of the terminal is performed to solve the problem that the terminal's PLMN changes in the cell, and the NAS TAU process often fails, and the recovery process under the user plane solution is improved.
  • FIG. 1 is a schematic diagram of a recovery process in an NB-IOT station according to the related art
  • FIG. 2 is a schematic diagram of a recovery process between NB-IOT stations according to the related art
  • FIG. 3 is a flowchart 1 of a method for selecting a core network according to an embodiment of the present invention
  • FIG. 4 is a second flowchart of a method for selecting a core network according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram 1 of a core network selection apparatus according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram 2 of a core network selection apparatus according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of carrying an indication cell by a UE recovery request according to a preferred embodiment of the present invention.
  • Figure 8 is a flow chart of a preferred embodiment 1 of the present invention.
  • Figure 9 is a flow chart of a preferred embodiment 2 of the present invention.
  • Figure 10 is a flow chart of a preferred embodiment 3 of the present invention.
  • Figure 11 is a flow chart of a preferred embodiment 4 of the present invention.
  • Figure 12 is a flow chart of a preferred embodiment 5 of the present invention.
  • Figure 13 is a flow chart of a preferred embodiment 6 in accordance with the present invention.
  • FIG. 3 is a flowchart 1 of a method for selecting a core network according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:
  • Step S302 The base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of: information of the selected public land network PLMN, and information of the registered mobility management entity MME;
  • Step S304 the base station searches for context information of the terminal, and if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, the base station selects the MME, where the base station is based on the selected The MME performs the current recovery process of the terminal.
  • the base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information;
  • the base station searches for context information of the terminal, and if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, the base station selects the MME, where the base station performs the MME based on the selected MME.
  • the current recovery process of the terminal solves the problem that the terminal's PLMN changes in the cell, and the NAS TAU process often fails, and the recovery process under the user plane solution is improved.
  • the base station searching for the context information of the terminal includes at least one of the following: the base station locally searches for a context message of the terminal, and the base station interacts with other base stations to find a context message of the terminal.
  • the selecting, by the base station, the MME includes:
  • the MME in the context information of the terminal performs a current recovery process of the terminal
  • the base station initiates a selection process of the MME, and selects a new MME to perform the current process of the terminal.
  • the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
  • FIG. 4 is a second flowchart of a method for selecting a core network according to an embodiment of the present invention. As shown in FIG. 4, the process includes the following steps:
  • Step S402 The terminal sends an air interface recovery request message to the base station, where the terminal initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: the selected public land network PLMN information, Registered mobility management entity MME information;
  • Step S404 the base station receives the air interface recovery request message sent by the terminal.
  • a core network selection device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 5 is a structural block diagram 1 of a core network selection apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus is located in a base station, and the apparatus includes:
  • the obtaining module 52 is configured to obtain an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information. ;
  • the locating module 54 is connected to the obtaining module 52 and configured to search for context information of the terminal, where the MME is selected if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the MME is selected.
  • the base station performs the current recovery process of the terminal based on the selected MME.
  • searching for the context information of the terminal includes at least one of the following: the searching module 54 locally searches for a context message of the terminal, and the searching module interacts with other base stations to find a context message of the terminal.
  • the selecting module 54 selects the MME to include:
  • the finding module 54 is configured to determine whether the MME in the context information of the terminal supports the information of the selected public terrestrial network PLMN;
  • the MME in the context information of the terminal performs a current recovery process of the terminal
  • the lookup module 54 initiates a selection process of the MME, and selects a new MME to perform the current process of the terminal.
  • the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
  • FIG. 6 is a structural block diagram 2 of a core network selection apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus is located in a terminal, and the apparatus includes:
  • the sending module 62 is configured to send an air interface recovery request message to the base station, where the sending module initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: a selected public land network PLMN Information, registered mobility management entity MME information.
  • a core network selection system including: a base station and a terminal;
  • the base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: a selected public land network PLMN information, and a registered mobility management entity MME information;
  • the base station searches for the context information of the terminal, and the information of the selected PLMN and the end of the context message are saved.
  • the base station selects the MME, where the base station performs the current recovery process of the terminal based on the selected MME.
  • FIG. 7 is a schematic diagram of carrying an indication cell by a UE recovery request according to a preferred embodiment of the present invention.
  • the UE initiates a recovery process, it is required to add the “Selected PLMN” information and the information in the air interface recovery request message. / or possible "registered MME" information, when the eNB receives the recovery request, first finds the context information of the UE in the eNB or between the eNBs.
  • the PLMN determination is first performed, if the UE newly selects The PLMN is different from the PLMN information in the saved context, and the eNB needs to re-trigger the core network selection according to the newly selected PLMN of the UE and the “registered MME” information that may be carried, and perform a subsequent recovery process according to the newly selected MME, or The air interface recovery rejection process, or the air interface triggers the RRC establishment process.
  • the air interface recovery request process may be a new air interface recovery request message, or may be an RRC re-establishment request message, that is, an air interface recovery request message under all the UP schemes.
  • the preferred embodiment of the present invention improves the recovery process under the user plane solution, and prevents the target eNB from selecting the wrong core network because the UE does not know the newly selected PLMN information when the terminal performs the cross-TAI recovery, and the TAU process fails. .
  • FIG. 8 is a flowchart of a preferred embodiment 1 according to the present invention. As shown in FIG. 8, Cell 1 and Cell 2 belong to two cells under one eNB, but support PLMNs are different.
  • Step S801 The UE performs a context suspension process on Cell 1 under the eNB;
  • Step S801 The UE moves from Cell 1 to Cell 2 under the same eNB in the suspended state. After reading the Cell 2 broadcast, the UE finds that the PLMN supported by Cell 2 is different from Cell 1, but belongs to the EPLMN list of the UE, so that the UE is pre- Initiate the TAU process;
  • Step S802 The UE first sends an RRC recovery request message on the Cell 2, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
  • Step S803 After receiving the request sent by the UE, the eNB first performs a UE context search. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the recovery request message. If the PLMN information is the same, Returning the RRC recovery response message to the UE;
  • Step S804 The eNB sends a UE context recovery request to the MME on the S1 interface. After receiving the message, the MME replies to the UE context recovery response message to the eNB, and the recovery process is completed. The UE and the MME perform TAU through the context direct transmission message.
  • FIG. 9 is a flowchart of a preferred embodiment 2 of the present invention. As shown in FIG. 9, Cell 1 and Cell 2 belong to two cells under one eNB, but support PLMNs are different.
  • Step S901 The UE performs a context suspension process on Cell 1 under the eNB;
  • Step S901 The UE moves to the Cell 2 under the same eNB in the suspended state. After reading the Cell 2 broadcast, the UE finds that the PLMN supported by the Cell 2 is different from the Cell 1 but belongs to the EPLMN list of the UE, so that the UE is pre- Initiate the TAU process;
  • Step S902 The UE first sends an RRC recovery request message on the Cell 2, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
  • Step S903 After receiving the request sent by the UE, the eNB first performs a UE context search. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message. If the PLMN information is different, Then starting the MME selection process;
  • Step S904 The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information, and if the MME has supported, the eNB sends an RRC recovery response to the UE;
  • Step S905 The eNB sends a UE context recovery request message to the MME on the S1 interface.
  • the message may carry the newly selected PLMN indication information of the UE.
  • the MME After receiving the message, the MME returns a UE context recovery response message to the eNB, and the recovery process is completed.
  • the MME performs TAU by using a context direct transfer message.
  • FIG. 10 is a flowchart of a preferred embodiment 3 of the present invention. As shown in FIG. 10, Cell 1 and Cell 2 belong to two cells under one eNB, but support PLMN is different.
  • Step S1001 The UE performs a context suspension process on Cell 1 under the eNB;
  • Step S1001 The UE moves from Cell 1 to Cell 2 under the same eNB in the suspended state. After reading the Cell 2 broadcast, the UE finds that the PLMN supported by Cell 2 is different from Cell 1 but belongs to the EPLMN list of the UE, so that the UE is pre- Initiate the TAU process;
  • Step S1002 The UE first sends an RRC recovery request message on the Cell 2, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
  • Step S1003 After receiving the request sent by the UE, the eNB first performs a UE context search. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message. If the PLMN information is different, Then starting the MME selection process;
  • Step S1004 The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information. If the MME does not support, the eNB performs any one of the following processes:
  • the eNB replies to the air interface RRC recovery reject message to the UE;
  • the eNB restores the RRC connection setup message to the UE, and the UE further sends an RRC Connection Setup Complete message to the eNB, where the NAS PDU (TAU Request or Attach Request) is carried.
  • NAS PDU TAU Request or Attach Request
  • FIG. 11 is a flow chart of a preferred embodiment 4 of the present invention. As shown in FIG. 11, the source eNB and the target eNB support different PLMNs.
  • Step S1101 The UE performs a context suspension process on the cell under the source eNB;
  • Step S1101 The UE moves from the source eNB to the target eNB in the suspended state, and the UE reads the target eNB under the cell broadcast and finds that the supported PLMN is different from the source eNB, but belongs to the EPLMN list of the UE, so that the UE pre-initiates the TAU process. ;
  • Step S1102 The UE first sends an RRC recovery request message on the target eNB, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
  • Step S1103 After receiving the request sent by the UE, the eNB first sends an X2 interface UE context query process. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message, if the PLMN If the information is the same, the RRC recovery response message is restored to the UE;
  • Step S1104 The eNB sends an S1 path switch request message to the MME on the S1 interface. After receiving the message, the MME returns an S1 path switch response message to the eNB, and the recovery process is completed. The UE and the MME perform TAU through the context direct transfer message.
  • FIG. 12 is a flowchart of a preferred embodiment 5 according to the present invention. As shown in FIG. 12, the source eNB and the target eNB support different PLMNs.
  • Step S1201 The UE performs a context suspension process on the cell under the source eNB;
  • Step S1201 The UE moves from the source eNB to the target eNB in the suspended state, and the UE reads the target eNB under the cell broadcast and finds that the supported PLMN is different from the source eNB, but belongs to the EPLMN list of the UE, so that the UE pre-initiates the TAU process. ;
  • Step S1202 The UE first sends an RRC recovery request message on the target eNB, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
  • Step S1203 After receiving the request sent by the UE, the eNB first sends an X2 interface UE context query process. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message, if the PLMN Different information, the MME selection process is initiated;
  • Step S1204 The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information, and if the MME has supported, the eNB sends an RRC recovery response to the UE;
  • Step S1205 The eNB sends an S1 path switch request message to the MME on the S1 interface.
  • the message may carry the newly selected PLMN indication information of the UE.
  • the MME After receiving the message, the MME returns an S1 path switch response message to the eNB, and the recovery process is completed.
  • the MME performs TAU by using a context direct transfer message.
  • FIG. 13 is a flowchart of a preferred embodiment 6 according to the present invention. As shown in FIG. 13, the source eNB and the target eNB support different PLMNs.
  • Step S1301 The UE performs a context suspension process in the cell under the source eNB;
  • Step S1301 The UE moves from the source eNB to the target eNB in the suspended state, and the UE reads the target eNB under the cell broadcast and finds that the supported PLMN is different from the source eNB, but belongs to the EPLMN list of the UE, so that the UE pre-initiates the TAU process. ;
  • Step S1302 The UE first sends an RRC recovery request message on the target eNB, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
  • Step S1303 After receiving the request sent by the UE, the eNB first sends an X2 interface UE context query process. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message, if the PLMN Different information, the MME selection process is initiated;
  • Step S1304 The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information. If the MME does not support, the eNB performs any one of the following processes:
  • the eNB replies to the air interface RRC recovery reject message to the UE;
  • the eNB restores the RRC connection setup message to the UE, and the UE further sends an RRC Connection Setup Complete message to the eNB, where the NAS PDU (TAU Request or Attach Request) is carried.
  • NAS PDU TAU Request or Attach Request
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of various embodiments of the present invention.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the storage medium may be configured to store program code for performing the method steps of the above embodiment:
  • the storage medium is further arranged to store program code for performing the following steps:
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • the processor performs the method steps of the foregoing embodiments according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the base station acquires the air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: the selected public land network PLMN information, The MME information of the registered mobility management entity; the base station searches for the context information of the terminal, and the base station selects the MME if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where The base station performs the current recovery process of the terminal based on the selected MME, and solves the problem that the terminal's PLMN changes in the cell, and the NAS TAU process often fails, and the recovery process under the user plane solution is improved.

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Abstract

The present invention provides a core network selection method, apparatus and system. The method comprises: a base station obtains an air interface recovery request message sent by a terminal initiating a recovery process, information carried in the air interface recovery request message comprising at least one of the following: information about a selected public land mobile network (PLMN) and information about a registered mobility management entity (MME); and the base station searches for context information of the terminal, and selects the MME in a case in which the information about the selected PLMN is different from a PLMN message of the terminal saved in the context message, and the base station performs a current recovery process of the terminal according to the selected MME. By means of the technical solution, the problems of the terminal caused when a PLMN of a cell is changed and an NAS TAU process frequently fails are resolved, thereby perfecting the recovery process in a user plane solution.

Description

核心网的选择方法、装置及系统Core network selection method, device and system 技术领域Technical field
本发明涉及通信领域，具体而言，涉及一种核心网的选择方法、装置及系统。The present invention relates to the field of communications, and in particular to a method, device and system for selecting a core network.
背景技术Background technique
窄带物联网(Narrow Band Internet of Things，简称为NB-IOT)技术主要为改进室内覆盖，是具备覆盖广、连接多、速率低、成本低、功耗小等特点的物联网通信系统。The Narrow Band Internet of Things (NB-IOT) technology is mainly used to improve indoor coverage. It is an IoT communication system with wide coverage, multiple connections, low speed, low cost, and low power consumption.
为了满足用户量大、吞吐量低等要求，NB-IOT系统中的数据传输分为两种方式：控制面方式(Control Plane Mode)和用户面方式(User Plane Mode)，前者主要通过将上下行数据携带在信令的网络附属存储(Network Attached Storage，简称为NAS)协议数据单元(Protocol Data Unit，简称为PDU)进行传输，UE接入后仅建立信令无线承载(Signal Radio Bearer，简称为SRB)，不建立数据无线承载(Data Radio Bearer，简称为DRB)；后者使用传统DRB用户面进行上下行数据传输，UE接入后除了建立SRB还需要建立DRB。In order to meet the requirements of large users and low throughput, the data transmission in the NB-IOT system is divided into two modes: Control Plane Mode and User Plane Mode. The former mainly passes the uplink and downlink. The data is carried in a Network Attached Storage (NAS) Protocol Data Unit (PDU) for transmission. After the UE accesses, only the Signal Radio Bearer (Signal Radio Bearer) is established. SRB), the Data Radio Bearer (DRB) is not established; the latter uses the traditional DRB user plane for uplink and downlink data transmission. After the UE accesses, the DRB needs to be established in addition to the SRB.
在User Plane Mode方式下，为了节省空口信令，并达到UE快速接入的目的，引入了上下文挂起Suspend和恢复Resume机制，即当UE和移动性管理实体(Mobile Management Entity，简称MME)完成上下行数据传输后，可采用挂起机制在eNB侧和MME侧将该UE的AS上下文挂起；若后续UE和MME之间需要进行数据传输，则通过恢复流程快速恢复UE的Uu及S1口连接。In the User Plane Mode mode, in order to save air interface signaling and achieve fast access of the UE, a context-suspended Suspend and resume Resume mechanism is introduced, that is, when the UE and the mobility management entity (Mobile Management Entity, MME for short) are completed. After the uplink and downlink data transmission, the AS context of the UE may be suspended on the eNB side and the MME side by using a suspend mechanism; if data transmission needs to be performed between the subsequent UE and the MME, the Uu and S1 ports of the UE are quickly restored through the recovery process. connection.
目前除了NB-IOT UE会支持User Plane Mode方式，对于普通WB-EUTRAN UE也可以支持User Plane Mode方式。前者终端类型由于移动性速度低，所以跨站恢复的场景不多，但对于后者，终端为普通智能终端，具备移动性的特性，因此很容易出现站内跨小区及跨站恢复的场景。In addition to the NB-IOT UE, the User Plane Mode mode is supported, and the User Plane Mode mode can also be supported for the common WB-EUTRAN UE. Because the mobility of the former terminal type is low, there are not many scenarios for cross-site recovery. However, for the latter, the terminal is an ordinary intelligent terminal and has mobility characteristics, so that it is easy to have a scenario of cross-cell and cross-site recovery in the station.
在相关技术中的恢复流程包括站内恢复和站间恢复两种场景，图1是根据相关技术中NB-IOT站内恢复流程示意图，如图1所示，UE在空口发送恢复请求后，eNB首先会根据请求中的恢复标识Resume ID来查找eNB内保存的该UE的上下文信息，若查找成功，则空口恢复成功，进而执行核心网的上下文恢复过程。图2是根据相关技术中NB-IOT站间恢复流程示意图，如图2所示，若UE选择的公众陆地移动电话网(Public Land Mobile Network，简称为PLMN)发生变化(比如源小区的PLMN在目标侧不支持，但同属于UE的EPLMN(equivalent PLMN)列表中)，则UE需要首先执行跟踪区更新(Tracking Area Undate，简称为TAU)过程，按照当前的恢复流程，eNB并不知道UE新选择的目标PLMN，从而无法根据新的PLMN进行MME选择，仅在老的MME上执行恢复流程，从而后续的NAS TAU流程会发生失败。The recovery process in the related art includes two scenarios of intra-site recovery and inter-station recovery. FIG. 1 is a schematic diagram of a recovery process in an NB-IOT station according to the related art. As shown in FIG. 1 , after the UE sends a recovery request on an air interface, the eNB firstly The context information of the UE saved in the eNB is searched according to the recovery identifier Resume ID in the request. If the search succeeds, the air interface is successfully restored, and then the context recovery process of the core network is performed. 2 is a schematic diagram of a NB-IOT inter-station recovery process according to the related art. As shown in FIG. 2, if a public land mobile network (Public Land Mobile Network, PLMN) selected by the UE changes (for example, the PLMN of the source cell is The target side does not support, but belongs to the EPLMN (equivalent PLMN) list of the UE. The UE needs to perform the Tracking Area Undate (TAU) process first. According to the current recovery procedure, the eNB does not know the new UE. The selected target PLMN, so that the MME selection cannot be performed according to the new PLMN, and the recovery process is performed only on the old MME, so that the subsequent NAS TAU process fails.
同理，在站间恢复场景中，若UE选择的站间目标恢复小区的PLMN发生变化，若按照当前跨站恢复流程执行TAU时，目标eNB并不知道UE新选择的目标PLMN，从而无法根据 新的PLMN进行MME选择，仅能从X2口UE上下文获取过程中获得老的GUMMEI，在老的MME上执行恢复流程，从而后续的NAS TAU流程会发生失败。Similarly, in the inter-station recovery scenario, if the PLMN of the inter-site target recovery cell selected by the UE changes, if the TAU is performed according to the current cross-station recovery procedure, the target eNB does not know the target PLMN newly selected by the UE, and thus cannot be based on The new PLMN performs the MME selection, and only the old GUMMEI can be obtained from the X2 port UE context acquisition process, and the recovery process is performed on the old MME, so that the subsequent NAS TAU process fails.
针对相关技术中，终端在小区的PLMN发生变化，NAS TAU流程经常发生失败的问题，目前还没有有效的解决方案。In the related art, the PLMN of the terminal changes in the cell, and the NAS TAU process often fails. Currently, there is no effective solution.
发明内容Summary of the invention
本发明实施例提供了一种核心网的选择方法、装置及系统，以至少解决相关技术中终端在小区的PLMN发生变化，NAS TAU流程经常发生失败的问题。The embodiment of the invention provides a method, a device and a system for selecting a core network, so as to at least solve the problem that a PLMN of a terminal in a cell changes in the related art, and the NAS TAU process often fails.
根据本发明实施例的一个方面，提供了一种核心网的选择方法，包括：According to an aspect of an embodiment of the present invention, a method for selecting a core network is provided, including:
基站获取发起恢复流程的终端发送的空口恢复请求消息，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；The base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information;
所述基站查找所述终端的上下文信息，在所述选择的PLMN的信息与所述上下文消息保存的所述终端的PLMN消息不同的情况下，所述基站对MME进行选择，其中，基站基于选择后的MME执行所述终端当前的恢复流程。The base station searches for context information of the terminal, where the base station selects an MME, where the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station selects The latter MME performs the current recovery process of the terminal.
可选地，所述基站查找所述终端的上下文信息包括以下至少之一：所述基站在本地查找所述终端的上下文消息，所述基站与其他基站交互查找所述终端的上下文消息。Optionally, the base station searching for the context information of the terminal includes at least one of the following: the base station locally searches for a context message of the terminal, and the base station interacts with other base stations to search for a context message of the terminal.
可选地，所述基站对MME进行选择包括：Optionally, the selecting, by the base station, the MME includes:
所述基站判断所述终端的上下文信息中的MME是否支持所述选择的公共陆地网络PLMN的信息；Determining, by the base station, whether the MME in the context information of the terminal supports information of the selected public terrestrial network PLMN;
其中，在支持的情况下，所述终端的上下文信息中的MME执行所述终端当前的恢复流程；Wherein, in the case of support, the MME in the context information of the terminal performs a current recovery process of the terminal;
在不支持的情况下，所述基站启动MME的选择过程，选择新的MME执行所述终端当前的流程。If not supported, the base station initiates a selection process of the MME, and selects a new MME to perform the current process of the terminal.
可选地，所述当前的恢复流程包括以下至少之一：所述终端发起的恢复流程的后续恢复流程，空口恢复拒绝流程，空口触发无线资源控制RRC建立流程。Optionally, the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
根据本发明实施例的另一个方面，还提供了一种核心网的选择方法，包括：According to another aspect of the embodiments of the present invention, a method for selecting a core network is also provided, including:
终端向基站发送空口恢复请求消息，其中，所述终端发起与所述空口恢复消息对应的恢复流程，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息。The terminal sends an air interface recovery request message to the base station, where the terminal initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: the selected public land network PLMN information, Registered mobility management entity MME information.
根据本发明实施例的另一个方面，还提供了一种核心网的选择装置，其中，位于基站中，包括： According to another aspect of the present invention, a device for selecting a core network, where the base station is located, includes:
获取模块，设置为获取发起恢复流程的终端发送的空口恢复请求消息，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；And an obtaining module, configured to obtain an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and information about the registered mobility management entity MME ;
查找模块，设置为查找所述终端的上下文信息，在所述选择的PLMN的信息与所述上下文消息保存的所述终端的PLMN消息不同的情况下，对MME进行选择，其中，基站基于选择后的MME执行所述终端当前的恢复流程。a locating module, configured to search for context information of the terminal, where the MME is selected if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station is based on the selection The MME performs the current recovery process of the terminal.
可选地，查找所述终端的上下文信息包括以下至少之一：所述查找模块在本地查找所述终端的上下文消息，所述查找模块与其他基站交互查找所述终端的上下文消息。Optionally, the searching for the context information of the terminal includes at least one of the following: the searching module locally searches for a context message of the terminal, and the searching module interacts with other base stations to search for a context message of the terminal.
可选地，所述查找模块对MME进行选择包括：Optionally, the selecting, by the searching module, the MME includes:
查找模块，设置为判断所述终端的上下文信息中的MME是否支持所述选择的公共陆地网络PLMN的信息；a finding module, configured to determine whether the MME in the context information of the terminal supports information of the selected public terrestrial network PLMN;
其中，在支持的情况下，所述终端的上下文信息中的MME执行所述终端当前的恢复流程；Wherein, in the case of support, the MME in the context information of the terminal performs a current recovery process of the terminal;
在不支持的情况下，所述查找模块启动MME的选择过程，选择新的MME执行所述终端当前的流程。If not supported, the searching module starts the selection process of the MME, and selects a new MME to execute the current process of the terminal.
可选地，所述当前的恢复流程包括以下至少之一：所述终端发起的恢复流程的后续恢复流程，空口恢复拒绝流程，空口触发无线资源控制RRC建立流程。Optionally, the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
根据本发明实施例的另一个方面，还提供了一种核心网的选择装置，位于终端中，包括：According to another aspect of the present invention, a device for selecting a core network, which is located in the terminal, includes:
发送模块，设置为向基站发送空口恢复请求消息，其中，所述发送模块发起与所述空口恢复消息对应的恢复流程，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息。The sending module is configured to send an air interface recovery request message to the base station, where the sending module initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: a selected public land network PLMN information, registered mobility management entity MME information.
根据本发明实施例的另一个方面，还提供了一种核心网的选择系统，包括：基站和终端；According to another aspect of the embodiments of the present invention, a core network selection system is further provided, including: a base station and a terminal;
所述基站获取发起恢复流程的所述终端发送的空口恢复请求消息，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；The base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information. ;
所述基站查找所述终端的上下文信息，在所述选择的PLMN的信息与所述上下文消息保存的所述终端的PLMN消息不同的情况下，所述基站对MME进行选择，其中，基站基于选择后的MME执行所述终端当前的恢复流程。The base station searches for context information of the terminal, where the base station selects an MME, where the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station selects The latter MME performs the current recovery process of the terminal.
根据本发明的又一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the following steps:
获取发起恢复流程的终端发送的空口恢复请求消息，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息； Obtaining an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of: information of the selected public terrestrial network PLMN, and information of the registered mobility management entity MME;
查找所述终端的上下文信息，在所述选择的PLMN的信息与所述上下文消息保存的所述终端的PLMN消息不同的情况下，所述基站对MME进行选择，其中，所述基站基于选择后的MME执行所述终端当前的恢复流程。Searching for context information of the terminal, where the base station selects an MME, where the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station is based on the selection The MME performs the current recovery process of the terminal.
通过本发明实施例，基站获取发起恢复流程的终端发送的空口恢复请求消息，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；该基站查找该终端的上下文信息，在该选择的PLMN的信息与该上下文消息保存的该终端的PLMN消息不同的情况下，该基站对MME进行选择，其中，该基站基于选择后的MME执行该终端当前的恢复流程，解决了终端在小区的PLMN发生变化，NAS TAU流程经常发生失败的问题，完善了用户面方案下的恢复流程。According to the embodiment of the present invention, the base station acquires the air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, the registered mobility management entity MME Information; the base station searches for context information of the terminal, and if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, the base station selects the MME, wherein the base station is based on the selected MME. The current recovery process of the terminal is performed to solve the problem that the terminal's PLMN changes in the cell, and the NAS TAU process often fails, and the recovery process under the user plane solution is improved.
附图说明DRAWINGS
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:
图1是根据相关技术中NB-IOT站内恢复流程示意图；1 is a schematic diagram of a recovery process in an NB-IOT station according to the related art;
图2是根据相关技术中NB-IOT站间恢复流程示意图；2 is a schematic diagram of a recovery process between NB-IOT stations according to the related art;
图3是根据本发明实施例的一种核心网的选择方法的流程图一；3 is a flowchart 1 of a method for selecting a core network according to an embodiment of the present invention;
图4是根据本发明实施例的一种核心网的选择方法的流程图二；4 is a second flowchart of a method for selecting a core network according to an embodiment of the present invention;
图5是根据本发明实施例的一种核心网的选择装置的结构框图一；FIG. 5 is a structural block diagram 1 of a core network selection apparatus according to an embodiment of the present invention; FIG.
图6是根据本发明实施例的一种核心网的选择装置的结构框图二；6 is a structural block diagram 2 of a core network selection apparatus according to an embodiment of the present invention;
图7是根据本发明优选实施例的通过UE恢复请求携带指示信元的示意图；7 is a schematic diagram of carrying an indication cell by a UE recovery request according to a preferred embodiment of the present invention;
图8是根据本发明优选实施例1的流程图；Figure 8 is a flow chart of a preferred embodiment 1 of the present invention;
图9是根据本发明优选实施例2的流程图；Figure 9 is a flow chart of a preferred embodiment 2 of the present invention;
图10是根据本发明优选实施例3的流程图；Figure 10 is a flow chart of a preferred embodiment 3 of the present invention;
图11是根据本发明优选实施例4的流程图；Figure 11 is a flow chart of a preferred embodiment 4 of the present invention;
图12是根据本发明优选实施例5的流程图；Figure 12 is a flow chart of a preferred embodiment 5 of the present invention;
图13是根据本发明优选实施例6的流程图。Figure 13 is a flow chart of a preferred embodiment 6 in accordance with the present invention.
具体实施方式detailed description
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。 The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.
在本实施例中提供了一种核心网的选择方法，图3是根据本发明实施例的一种核心网的选择方法的流程图一，如图3所示，该流程包括如下步骤：In this embodiment, a method for selecting a core network is provided. FIG. 3 is a flowchart 1 of a method for selecting a core network according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:
步骤S302，基站获取发起恢复流程的终端发送的空口恢复请求消息，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；Step S302: The base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of: information of the selected public land network PLMN, and information of the registered mobility management entity MME;
步骤S304，该基站查找该终端的上下文信息，在该选择的PLMN的信息与该上下文消息保存的该终端的PLMN消息不同的情况下，该基站对MME进行选择，其中，该基站基于选择后的MME执行该终端当前的恢复流程。Step S304, the base station searches for context information of the terminal, and if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, the base station selects the MME, where the base station is based on the selected The MME performs the current recovery process of the terminal.
通过上述步骤，基站获取发起恢复流程的终端发送的空口恢复请求消息，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；该基站查找该终端的上下文信息，在该选择的PLMN的信息与该上下文消息保存的该终端的PLMN消息不同的情况下，该基站对MME进行选择，其中，该基站基于选择后的MME执行该终端当前的恢复流程，解决了终端在小区的PLMN发生变化，NAS TAU流程经常发生失败的问题，完善了用户面方案下的恢复流程。Through the above steps, the base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information; The base station searches for context information of the terminal, and if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, the base station selects the MME, where the base station performs the MME based on the selected MME. The current recovery process of the terminal solves the problem that the terminal's PLMN changes in the cell, and the NAS TAU process often fails, and the recovery process under the user plane solution is improved.
在本发明的实施例中，该基站查找该终端的上下文信息包括以下至少之一：该基站在本地查找该终端的上下文消息，该基站与其他基站交互查找该终端的上下文消息。In an embodiment of the present invention, the base station searching for the context information of the terminal includes at least one of the following: the base station locally searches for a context message of the terminal, and the base station interacts with other base stations to find a context message of the terminal.
在本发明的实施例中，该基站对MME进行选择包括：In an embodiment of the present invention, the selecting, by the base station, the MME includes:
该基站判断该终端的上下文信息中的MME是否支持该选择的公共陆地网络PLMN的信息；Determining, by the base station, whether the MME in the context information of the terminal supports information of the selected public terrestrial network PLMN;
其中，在支持的情况下，该终端的上下文信息中的MME执行该终端当前的恢复流程；Wherein, in the case of support, the MME in the context information of the terminal performs a current recovery process of the terminal;
在不支持的情况下，该基站启动MME的选择过程，选择新的MME执行该终端当前的流程。If not supported, the base station initiates a selection process of the MME, and selects a new MME to perform the current process of the terminal.
在本发明的实施例中，该当前的恢复流程包括以下至少之一：该终端发起的恢复流程的后续恢复流程，空口恢复拒绝流程，空口触发无线资源控制RRC建立流程。In the embodiment of the present invention, the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
在本实施例中提供了一种核心网的选择方法，图4是根据本发明实施例的一种核心网的选择方法的流程图二，如图4所示，该流程包括如下步骤：In this embodiment, a method for selecting a core network is provided. FIG. 4 is a second flowchart of a method for selecting a core network according to an embodiment of the present invention. As shown in FIG. 4, the process includes the following steps:
步骤S402，终端向基站发送空口恢复请求消息，其中，该终端发起与该空口恢复消息对应的恢复流程，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；Step S402: The terminal sends an air interface recovery request message to the base station, where the terminal initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: the selected public land network PLMN information, Registered mobility management entity MME information;
步骤S404，基站接收该终端发送的空口恢复请求消息。 Step S404, the base station receives the air interface recovery request message sent by the terminal.
在本实施例中还提供了一种核心网的选择装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。In this embodiment, a core network selection device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
图5是根据本发明实施例的一种核心网的选择装置的结构框图一，如图5所示，位于基站中，该装置包括：FIG. 5 is a structural block diagram 1 of a core network selection apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus is located in a base station, and the apparatus includes:
获取模块52，设置为获取发起恢复流程的终端发送的空口恢复请求消息，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；The obtaining module 52 is configured to obtain an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information. ;
查找模块54，与获取模块52连接，设置为查找该终端的上下文信息，在该选择的PLMN的信息与该上下文消息保存的该终端的PLMN消息不同的情况下，对MME进行选择，其中，该基站基于选择后的MME执行该终端当前的恢复流程。The locating module 54 is connected to the obtaining module 52 and configured to search for context information of the terminal, where the MME is selected if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the MME is selected. The base station performs the current recovery process of the terminal based on the selected MME.
在本发明的实施例中，查找该终端的上下文信息包括以下至少之一：该查找模块54在本地查找该终端的上下文消息，该查找模块与其他基站交互查找该终端的上下文消息。In an embodiment of the present invention, searching for the context information of the terminal includes at least one of the following: the searching module 54 locally searches for a context message of the terminal, and the searching module interacts with other base stations to find a context message of the terminal.
在本发明的实施例中，该查找模块54对MME进行选择包括：In the embodiment of the present invention, the selecting module 54 selects the MME to include:
查找模块54设置为判断该终端的上下文信息中的MME是否支持该选择的公共陆地网络PLMN的信息；The finding module 54 is configured to determine whether the MME in the context information of the terminal supports the information of the selected public terrestrial network PLMN;
其中，在支持的情况下，该终端的上下文信息中的MME执行该终端当前的恢复流程；Wherein, in the case of support, the MME in the context information of the terminal performs a current recovery process of the terminal;
在不支持的情况下，该查找模块54启动MME的选择过程，选择新的MME执行该终端当前的流程。If not supported, the lookup module 54 initiates a selection process of the MME, and selects a new MME to perform the current process of the terminal.
在本发明的实施例中，该当前的恢复流程包括以下至少之一：该终端发起的恢复流程的后续恢复流程，空口恢复拒绝流程，空口触发无线资源控制RRC建立流程。In the embodiment of the present invention, the current recovery process includes at least one of the following: a subsequent recovery process of the recovery process initiated by the terminal, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment process.
图6是根据本发明实施例的一种核心网的选择装置的结构框图二，如图6所示，位于终端中，该装置包括：FIG. 6 is a structural block diagram 2 of a core network selection apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus is located in a terminal, and the apparatus includes:
发送模块62，设置为向基站发送空口恢复请求消息，其中，该发送模块发起与该空口恢复消息对应的恢复流程，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息。The sending module 62 is configured to send an air interface recovery request message to the base station, where the sending module initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: a selected public land network PLMN Information, registered mobility management entity MME information.
在本发明的另一个实施例中，还提供了一种核心网的选择系统，包括：基站和终端；In another embodiment of the present invention, a core network selection system is further provided, including: a base station and a terminal;
该基站获取发起恢复流程的该终端发送的空口恢复请求消息，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；The base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: a selected public land network PLMN information, and a registered mobility management entity MME information;
该基站查找该终端的上下文信息，在该选择的PLMN的信息与该上下文消息保存的该终 端的PLMN消息不同的情况下，该基站对MME进行选择，其中，该基站基于选择后的MME执行该终端当前的恢复流程。The base station searches for the context information of the terminal, and the information of the selected PLMN and the end of the context message are saved. When the PLMN message of the terminal is different, the base station selects the MME, where the base station performs the current recovery process of the terminal based on the selected MME.
下面结合优选实施例和实施方式对本发明进行详细说明。The invention will now be described in detail in conjunction with the preferred embodiments and embodiments.
图7是根据本发明优选实施例的通过UE恢复请求携带指示信元的示意图，如图7所示，当UE发起恢复流程时，需要在空口恢复请求消息中增加携带“选择的PLMN”信息和/或可能的“已注册的MME”信息，当eNB收到该恢复请求时，首先在eNB内或eNB间查找该UE的上下文信息，若查找成功，则首先进行PLMN判定，若UE新选择的PLMN与已保存上下文中的PLMN信息不同，则eNB需要结合UE新选择的PLMN及可能携带的“已注册的MME”信息，重新触发核心网选择，并根据新选择的MME执行后续恢复流程，或空口恢复拒绝流程，或空口触发RRC建立流程。FIG. 7 is a schematic diagram of carrying an indication cell by a UE recovery request according to a preferred embodiment of the present invention. As shown in FIG. 7, when the UE initiates a recovery process, it is required to add the “Selected PLMN” information and the information in the air interface recovery request message. / or possible "registered MME" information, when the eNB receives the recovery request, first finds the context information of the UE in the eNB or between the eNBs. If the search is successful, the PLMN determination is first performed, if the UE newly selects The PLMN is different from the PLMN information in the saved context, and the eNB needs to re-trigger the core network selection according to the newly selected PLMN of the UE and the “registered MME” information that may be carried, and perform a subsequent recovery process according to the newly selected MME, or The air interface recovery rejection process, or the air interface triggers the RRC establishment process.
上述空口恢复流程可以是新增的空口恢复请求消息，也可以是RRC重建立请求消息，即包括所有UP方案下的空口恢复请求消息。The air interface recovery request process may be a new air interface recovery request message, or may be an RRC re-establishment request message, that is, an air interface recovery request message under all the UP schemes.
上述本发明的优选实施例，完善了用户面方案下的恢复流程，避免终端进行跨TAI恢复时，目标eNB由于不知道UE新选择的PLMN信息，从而选择错误的核心网，进而TAU过程发生失败。The preferred embodiment of the present invention improves the recovery process under the user plane solution, and prevents the target eNB from selecting the wrong core network because the UE does not know the newly selected PLMN information when the terminal performs the cross-TAI recovery, and the TAU process fails. .
实施例1：Example 1:
图8是根据本发明优选实施例1的流程图，如图8所示，Cell 1和Cell 2同属于一个eNB下的两个小区，但支持PLMN不同。FIG. 8 is a flowchart of a preferred embodiment 1 according to the present invention. As shown in FIG. 8, Cell 1 and Cell 2 belong to two cells under one eNB, but support PLMNs are different.
步骤S801：UE在eNB下的Cell 1进行上下文挂起过程；Step S801: The UE performs a context suspension process on Cell 1 under the eNB;
步骤S801：UE在挂起状态下由Cell 1移动到同一eNB下的Cell 2，UE读取Cell 2广播后发现Cell 2支持的PLMN与Cell 1不同，但同属于UE的EPLMN列表，从而UE预发起TAU过程；Step S801: The UE moves from Cell 1 to Cell 2 under the same eNB in the suspended state. After reading the Cell 2 broadcast, the UE finds that the PLMN supported by Cell 2 is different from Cell 1, but belongs to the EPLMN list of the UE, so that the UE is pre- Initiate the TAU process;
步骤S802：UE首先在Cell 2上发送RRC恢复请求消息，请求消息中携带UE新选择的PLMN信息、和/或携带之前已注册的MME信息(GUMMEI)；Step S802: The UE first sends an RRC recovery request message on the Cell 2, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
步骤S803：eNB收到UE发送的该请求后，首先进行UE上下文查找，查找成功后，判断已保存上下文中的PLMN信息与恢复请求消息中新选择的PLMN信息进行比对，若PLMN信息相同，则恢复RRC恢复响应消息给UE；Step S803: After receiving the request sent by the UE, the eNB first performs a UE context search. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the recovery request message. If the PLMN information is the same, Returning the RRC recovery response message to the UE;
步骤S804：eNB在S1口发送UE上下文恢复请求给MME，MME收到该消息后回复UE上下文恢复响应消息给eNB，恢复过程完成，UE和MME通过上下文直传消息进行TAU。Step S804: The eNB sends a UE context recovery request to the MME on the S1 interface. After receiving the message, the MME replies to the UE context recovery response message to the eNB, and the recovery process is completed. The UE and the MME perform TAU through the context direct transmission message.
实施例2：Example 2:
图9是根据本发明优选实施例2的流程图，如图9所示，Cell 1和Cell 2同属于一个eNB下的两个小区，但支持PLMN不同。 9 is a flowchart of a preferred embodiment 2 of the present invention. As shown in FIG. 9, Cell 1 and Cell 2 belong to two cells under one eNB, but support PLMNs are different.
步骤S901：UE在eNB下的Cell 1进行上下文挂起过程；Step S901: The UE performs a context suspension process on Cell 1 under the eNB;
步骤S901：UE在挂起状态下由Cell 1移动到同一eNB下的Cell 2，UE读取Cell 2广播后发现Cell 2支持的PLMN与Cell 1不同，但同属于UE的EPLMN列表，从而UE预发起TAU过程；Step S901: The UE moves to the Cell 2 under the same eNB in the suspended state. After reading the Cell 2 broadcast, the UE finds that the PLMN supported by the Cell 2 is different from the Cell 1 but belongs to the EPLMN list of the UE, so that the UE is pre- Initiate the TAU process;
步骤S902：UE首先在Cell 2上发送RRC恢复请求消息，请求消息中携带UE新选择的PLMN信息、和/或携带之前已注册的MME信息(GUMMEI)；Step S902: The UE first sends an RRC recovery request message on the Cell 2, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
步骤S903：eNB收到UE发送的该请求后，首先进行UE上下文查找，查找成功后，判断已保存上下文中的PLMN信息与恢复请求消息中新选择的PLMN信息进行比对，若PLMN信息不同，则启动MME选择过程；Step S903: After receiving the request sent by the UE, the eNB first performs a UE context search. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message. If the PLMN information is different, Then starting the MME selection process;
步骤S904：eNB首先判断已保存上下文中的MME(GUMMEI)是否支持新选择的PLMN信息，若该MME已支持，则eNB发送RRC恢复响应给UE；Step S904: The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information, and if the MME has supported, the eNB sends an RRC recovery response to the UE;
步骤S905：eNB在S1口发送UE上下文恢复请求消息给MME；该消息中可能携带UE新选择的PLMN指示信息；MME收到该消息后回复UE上下文恢复响应消息给eNB，恢复过程完成，UE和MME通过上下文直传消息进行TAU。Step S905: The eNB sends a UE context recovery request message to the MME on the S1 interface. The message may carry the newly selected PLMN indication information of the UE. After receiving the message, the MME returns a UE context recovery response message to the eNB, and the recovery process is completed. The MME performs TAU by using a context direct transfer message.
实施例3：Example 3:
图10是根据本发明优选实施例3的流程图，如图10所示，Cell 1和Cell 2同属于一个eNB下的两个小区，但支持PLMN不同。FIG. 10 is a flowchart of a preferred embodiment 3 of the present invention. As shown in FIG. 10, Cell 1 and Cell 2 belong to two cells under one eNB, but support PLMN is different.
步骤S1001：UE在eNB下的Cell 1进行上下文挂起过程；Step S1001: The UE performs a context suspension process on Cell 1 under the eNB;
步骤S1001：UE在挂起状态下由Cell 1移动到同一eNB下的Cell 2，UE读取Cell 2广播后发现Cell 2支持的PLMN与Cell 1不同，但同属于UE的EPLMN列表，从而UE预发起TAU过程；Step S1001: The UE moves from Cell 1 to Cell 2 under the same eNB in the suspended state. After reading the Cell 2 broadcast, the UE finds that the PLMN supported by Cell 2 is different from Cell 1 but belongs to the EPLMN list of the UE, so that the UE is pre- Initiate the TAU process;
步骤S1002：UE首先在Cell 2上发送RRC恢复请求消息，请求消息中携带UE新选择的PLMN信息、和/或携带之前已注册的MME信息(GUMMEI)；Step S1002: The UE first sends an RRC recovery request message on the Cell 2, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
步骤S1003：eNB收到UE发送的该请求后，首先进行UE上下文查找，查找成功后，判断已保存上下文中的PLMN信息与恢复请求消息中新选择的PLMN信息进行比对，若PLMN信息不同，则启动MME选择过程；Step S1003: After receiving the request sent by the UE, the eNB first performs a UE context search. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message. If the PLMN information is different, Then starting the MME selection process;
步骤S1004：eNB首先判断已保存上下文中的MME(GUMMEI)是否支持新选择的PLMN信息，若该MME不支持，则eNB执行下述流程中的任意一种：Step S1004: The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information. If the MME does not support, the eNB performs any one of the following processes:
eNB回复空口RRC恢复拒绝消息给UE；The eNB replies to the air interface RRC recovery reject message to the UE;
或者eNB恢复RRC连接建立消息给UE，UE进而发送RRC连接建立完成消息给eNB，其中携带NAS PDU(TAU请求或Attach请求)。 Or the eNB restores the RRC connection setup message to the UE, and the UE further sends an RRC Connection Setup Complete message to the eNB, where the NAS PDU (TAU Request or Attach Request) is carried.
实施例4：Example 4:
图11是根据本发明优选实施例4的流程图，如图11所示，源eNB和目标eNB支持不同的PLMN。11 is a flow chart of a preferred embodiment 4 of the present invention. As shown in FIG. 11, the source eNB and the target eNB support different PLMNs.
步骤S1101：UE在源eNB下的小区进行上下文挂起过程；Step S1101: The UE performs a context suspension process on the cell under the source eNB;
步骤S1101：UE在挂起状态下由源eNB移动到目标eNB下，UE读取目标eNB下小区广播后发现支持的PLMN与源eNB不同，但同属于UE的EPLMN列表，从而UE预发起TAU过程；Step S1101: The UE moves from the source eNB to the target eNB in the suspended state, and the UE reads the target eNB under the cell broadcast and finds that the supported PLMN is different from the source eNB, but belongs to the EPLMN list of the UE, so that the UE pre-initiates the TAU process. ;
步骤S1102：UE首先在目标eNB上发送RRC恢复请求消息，请求消息中携带UE新选择的PLMN信息、和/或携带之前已注册的MME信息(GUMMEI)；Step S1102: The UE first sends an RRC recovery request message on the target eNB, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
步骤S1103：eNB收到UE发送的该请求后，首先发送X2口UE上下文查询过程，查找成功后，判断已保存上下文中的PLMN信息与恢复请求消息中新选择的PLMN信息进行比对，若PLMN信息相同，则恢复RRC恢复响应消息给UE；Step S1103: After receiving the request sent by the UE, the eNB first sends an X2 interface UE context query process. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message, if the PLMN If the information is the same, the RRC recovery response message is restored to the UE;
步骤S1104：eNB在S1口发送S1路径切换请求消息给MME，MME收到该消息后回复S1路径切换响应消息给eNB，恢复过程完成，UE和MME通过上下文直传消息进行TAU。Step S1104: The eNB sends an S1 path switch request message to the MME on the S1 interface. After receiving the message, the MME returns an S1 path switch response message to the eNB, and the recovery process is completed. The UE and the MME perform TAU through the context direct transfer message.
实施例5：Example 5:
图12是根据本发明优选实施例5的流程图，如图12所示，源eNB和目标eNB支持不同的PLMN。FIG. 12 is a flowchart of a preferred embodiment 5 according to the present invention. As shown in FIG. 12, the source eNB and the target eNB support different PLMNs.
步骤S1201：UE在源eNB下的小区进行上下文挂起过程；Step S1201: The UE performs a context suspension process on the cell under the source eNB;
步骤S1201：UE在挂起状态下由源eNB移动到目标eNB下，UE读取目标eNB下小区广播后发现支持的PLMN与源eNB不同，但同属于UE的EPLMN列表，从而UE预发起TAU过程；Step S1201: The UE moves from the source eNB to the target eNB in the suspended state, and the UE reads the target eNB under the cell broadcast and finds that the supported PLMN is different from the source eNB, but belongs to the EPLMN list of the UE, so that the UE pre-initiates the TAU process. ;
步骤S1202：UE首先在目标eNB上发送RRC恢复请求消息，请求消息中携带UE新选择的PLMN信息、和/或携带之前已注册的MME信息(GUMMEI)；Step S1202: The UE first sends an RRC recovery request message on the target eNB, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
步骤S1203：eNB收到UE发送的该请求后，首先发送X2口UE上下文查询过程，查找成功后，判断已保存上下文中的PLMN信息与恢复请求消息中新选择的PLMN信息进行比对，若PLMN信息不同，则启动MME选择过程；Step S1203: After receiving the request sent by the UE, the eNB first sends an X2 interface UE context query process. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message, if the PLMN Different information, the MME selection process is initiated;
步骤S1204：eNB首先判断已保存上下文中的MME(GUMMEI)是否支持新选择的PLMN信息，若该MME已支持，则eNB发送RRC恢复响应给UE；Step S1204: The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information, and if the MME has supported, the eNB sends an RRC recovery response to the UE;
步骤S1205：eNB在S1口发送S1路径切换请求消息给MME；该消息中可能携带UE新选择的PLMN指示信息；MME收到该消息后回复S1路径切换响应消息给eNB，恢复过程完成，UE和MME通过上下文直传消息进行TAU。 Step S1205: The eNB sends an S1 path switch request message to the MME on the S1 interface. The message may carry the newly selected PLMN indication information of the UE. After receiving the message, the MME returns an S1 path switch response message to the eNB, and the recovery process is completed. The MME performs TAU by using a context direct transfer message.
实施例6：Example 6
图13是根据本发明优选实施例6的流程图，如图13所示，源eNB和目标eNB支持不同的PLMN。FIG. 13 is a flowchart of a preferred embodiment 6 according to the present invention. As shown in FIG. 13, the source eNB and the target eNB support different PLMNs.
步骤S1301：UE在源eNB下的小区进行上下文挂起过程；Step S1301: The UE performs a context suspension process in the cell under the source eNB;
步骤S1301：UE在挂起状态下由源eNB移动到目标eNB下，UE读取目标eNB下小区广播后发现支持的PLMN与源eNB不同，但同属于UE的EPLMN列表，从而UE预发起TAU过程；Step S1301: The UE moves from the source eNB to the target eNB in the suspended state, and the UE reads the target eNB under the cell broadcast and finds that the supported PLMN is different from the source eNB, but belongs to the EPLMN list of the UE, so that the UE pre-initiates the TAU process. ;
步骤S1302：UE首先在目标eNB上发送RRC恢复请求消息，请求消息中携带UE新选择的PLMN信息、和/或携带之前已注册的MME信息(GUMMEI)；Step S1302: The UE first sends an RRC recovery request message on the target eNB, where the request message carries the newly selected PLMN information of the UE, and/or carries the previously registered MME information (GUMMEI);
步骤S1303：eNB收到UE发送的该请求后，首先发送X2口UE上下文查询过程，查找成功后，判断已保存上下文中的PLMN信息与恢复请求消息中新选择的PLMN信息进行比对，若PLMN信息不同，则启动MME选择过程；Step S1303: After receiving the request sent by the UE, the eNB first sends an X2 interface UE context query process. After the search succeeds, it is determined that the PLMN information in the saved context is compared with the newly selected PLMN information in the restoration request message, if the PLMN Different information, the MME selection process is initiated;
步骤S1304：eNB首先判断已保存上下文中的MME(GUMMEI)是否支持新选择的PLMN信息，若该MME不支持，则eNB执行下述流程中的任意一种：Step S1304: The eNB first determines whether the MME (GUMMEI) in the saved context supports the newly selected PLMN information. If the MME does not support, the eNB performs any one of the following processes:
eNB回复空口RRC恢复拒绝消息给UE；The eNB replies to the air interface RRC recovery reject message to the UE;
或者eNB恢复RRC连接建立消息给UE，UE进而发送RRC连接建立完成消息给eNB，其中携带NAS PDU(TAU请求或Attach请求)。Or the eNB restores the RRC connection setup message to the UE, and the UE further sends an RRC Connection Setup Complete message to the eNB, where the NAS PDU (TAU Request or Attach Request) is carried.
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根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例该的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of various embodiments of the present invention.
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行上述实施例的方法步骤的程序代码：Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the storage medium may be configured to store program code for performing the method steps of the above embodiment:
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：Optionally, the storage medium is further arranged to store program code for performing the following steps:
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或 者光盘等各种可以存储程序代码的介质。Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. Dish or A medium such as a compact disc that can store program code.
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述实施例的方法步骤。Optionally, in this embodiment, the processor performs the method steps of the foregoing embodiments according to the stored program code in the storage medium.
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
工业实用性Industrial applicability
在本发明实施例的核心网的选择过程中，基站获取发起恢复流程的终端发送的空口恢复请求消息，该空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；该基站查找该终端的上下文信息，在该选择的PLMN的信息与该上下文消息保存的该终端的PLMN消息不同的情况下，该基站对MME进行选择，其中，该基站基于选择后的MME执行该终端当前的恢复流程，解决了终端在小区的PLMN发生变化，NAS TAU流程经常发生失败的问题，完善了用户面方案下的恢复流程。 In the process of selecting the core network of the embodiment of the present invention, the base station acquires the air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: the selected public land network PLMN information, The MME information of the registered mobility management entity; the base station searches for the context information of the terminal, and the base station selects the MME if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where The base station performs the current recovery process of the terminal based on the selected MME, and solves the problem that the terminal's PLMN changes in the cell, and the NAS TAU process often fails, and the recovery process under the user plane solution is improved.

Claims (11)

  1. 一种核心网的选择方法，包括：A method of selecting a core network, including:
    基站获取发起恢复流程的终端发送的空口恢复请求消息，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；The base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information;
    所述基站查找所述终端的上下文信息，在所述选择的PLMN的信息与所述上下文消息保存的所述终端的PLMN消息不同的情况下，所述基站对MME进行选择，其中，所述基站基于选择后的MME执行所述终端当前的恢复流程。The base station searches for context information of the terminal, where the base station selects an MME, where the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station The current recovery process of the terminal is performed based on the selected MME.
  2. 根据权利要求1所述的方法，其中，所述基站查找所述终端的上下文信息包括以下至少之一：所述基站在本地查找所述终端的上下文消息，所述基站与其他基站交互查找所述终端的上下文消息。The method according to claim 1, wherein the base station searching for the context information of the terminal comprises at least one of: the base station locally searches for a context message of the terminal, and the base station interacts with other base stations to find the The context message of the terminal.
  3. 根据权利要求1所述的方法，其中，所述基站对MME进行选择包括：The method of claim 1, wherein the selecting, by the base station, the MME comprises:
    所述基站判断所述终端的上下文信息中的MME是否支持所述选择的公共陆地网络PLMN的信息；Determining, by the base station, whether the MME in the context information of the terminal supports information of the selected public terrestrial network PLMN;
    其中，在支持的情况下，所述终端的上下文信息中的MME执行所述终端当前的恢复流程；Wherein, in the case of support, the MME in the context information of the terminal performs a current recovery process of the terminal;
    在不支持的情况下，所述基站启动MME的选择过程，选择新的MME执行所述终端当前的流程。If not supported, the base station initiates a selection process of the MME, and selects a new MME to perform the current process of the terminal.
  4. 根据权利要求1所述的方法，其中，所述当前的恢复流程包括以下至少之一：所述终端发起的恢复流程的后续恢复流程，空口恢复拒绝流程，空口触发无线资源控制RRC建立流程。The method according to claim 1, wherein the current recovery process comprises at least one of: a subsequent recovery process of the terminal initiated recovery process, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment procedure.
  5. 一种核心网的选择方法，包括：A method of selecting a core network, including:
    终端向基站发送空口恢复请求消息，其中，所述终端发起与所述空口恢复消息对应的恢复流程，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息。The terminal sends an air interface recovery request message to the base station, where the terminal initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: the selected public land network PLMN information, Registered mobility management entity MME information.
  6. 一种核心网的选择装置，位于基站中，包括：A core network selection device is located in the base station and includes:
    获取模块，设置为获取发起恢复流程的终端发送的空口恢复请求消息，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；And an obtaining module, configured to obtain an air interface recovery request message sent by the terminal that initiates the recovery process, where the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and information about the registered mobility management entity MME ;
    查找模块，设置为查找所述终端的上下文信息，在所述选择的PLMN的信息与所述上下文消息保存的所述终端的PLMN消息不同的情况下，对MME进行选择，其中，基站基于选择后的MME执行所述终端当前的恢复流程。 a locating module, configured to search for context information of the terminal, where the MME is selected if the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station is based on the selection The MME performs the current recovery process of the terminal.
  7. 根据权利要求6所述的装置，其中，查找所述终端的上下文信息包括以下至少之一：所述查找模块在本地查找所述终端的上下文消息，所述查找模块与其他基站交互查找所述终端的上下文消息。The apparatus according to claim 6, wherein the searching for the context information of the terminal comprises at least one of: the searching module locally searches for a context message of the terminal, and the searching module searches for the terminal by interacting with other base stations. Contextual message.
  8. 根据权利要求6所述的装置，其中，所述查找模块对MME进行选择包括：The apparatus according to claim 6, wherein the selecting module selects the MME comprises:
    查找模块，设置为判断所述终端的上下文信息中的MME是否支持所述选择的公共陆地网络PLMN的信息；a finding module, configured to determine whether the MME in the context information of the terminal supports information of the selected public terrestrial network PLMN;
    其中，在支持的情况下，所述终端的上下文信息中的MME执行所述终端当前的恢复流程；Wherein, in the case of support, the MME in the context information of the terminal performs a current recovery process of the terminal;
    在不支持的情况下，所述查找模块启动MME的选择过程，选择新的MME执行所述终端当前的流程。If not supported, the searching module starts the selection process of the MME, and selects a new MME to execute the current process of the terminal.
  9. 根据权利要求6所述的装置，其中，所述当前的恢复流程包括以下至少之一：所述终端发起的恢复流程的后续恢复流程，空口恢复拒绝流程，空口触发无线资源控制RRC建立流程。The device according to claim 6, wherein the current recovery process comprises at least one of: a subsequent recovery process of the terminal initiated recovery process, an air interface recovery rejection process, and an air interface triggering a radio resource control RRC establishment procedure.
  10. 一种核心网的选择装置，位于终端中，包括：A core network selection device is located in the terminal and includes:
    发送模块，设置为向基站发送空口恢复请求消息，其中，所述发送模块发起与所述空口恢复消息对应的恢复流程，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息。The sending module is configured to send an air interface recovery request message to the base station, where the sending module initiates a recovery process corresponding to the air interface recovery message, where the information carried by the air interface recovery message includes at least one of the following: a selected public land network PLMN information, registered mobility management entity MME information.
  11. 一种核心网的选择系统，包括：基站和终端；A core network selection system includes: a base station and a terminal;
    所述基站获取发起恢复流程的所述终端发送的空口恢复请求消息，所述空口恢复消息携带的信息包括以下至少之一：选择的公共陆地网络PLMN的信息，已注册的移动性管理实体MME信息；The base station acquires an air interface recovery request message sent by the terminal that initiates the recovery process, and the information carried by the air interface recovery message includes at least one of the following: information of the selected public terrestrial network PLMN, and the registered mobility management entity MME information. ;
    所述基站查找所述终端的上下文信息，在所述选择的PLMN的信息与所述上下文消息保存的所述终端的PLMN消息不同的情况下，所述基站对MME进行选择，其中，基站基于选择后的MME执行所述终端当前的恢复流程。 The base station searches for context information of the terminal, where the base station selects an MME, where the information of the selected PLMN is different from the PLMN message of the terminal saved by the context message, where the base station selects The latter MME performs the current recovery process of the terminal.
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