WO2017177940A1 - Procédé, appareil, et système de sélection de réseau central - Google Patents

Procédé, appareil, et système de sélection de réseau central 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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WIPO (PCT)
Prior art keywords
terminal
information
mme
base station
message
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PCT/CN2017/080417
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English (en)
Chinese (zh)
Inventor
刘静
高音
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中兴通讯股份有限公司
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Publication of WO2017177940A1 publication Critical patent/WO2017177940A1/fr

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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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un appareil, et un système de sélection de réseau central. Le procédé comprend les étapes suivantes : une station de base obtient un message de demande de récupération d'interface radio envoyé par un terminal initiant un processus de récupération, des informations contenues dans le message de demande de récupération d'interface radio comprenant au moins l'un des éléments suivants : des informations concernant un réseau mobile terrestre public (PLMN) sélectionné, et des informations concernant une entité de gestion de mobilité (MME) enregistrée ; et la station de base recherche des informations de contexte du terminal, et sélectionne la MME dans un cas où les informations concernant le PLMN sélectionné sont différentes d'un message PLMN du terminal enregistré dans le message de contexte, et la station de base exécute un processus de récupération actuel du terminal selon la MME sélectionnée La solution technique de l'invention résout les problèmes rencontrés par le terminal lorsqu'un PLMN d'une cellule est modifié et qu'un processus TAU NAS échoue fréquemment. L'invention améliore ainsi le processus de récupération dans une solution de plan utilisateur.
PCT/CN2017/080417 2016-04-14 2017-04-13 Procédé, appareil, et système de sélection de réseau central WO2017177940A1 (fr)

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CN201610232105.9 2016-04-14

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