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WO2023241467A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2023241467A1
WO2023241467A1 PCT/CN2023/099279 CN2023099279W WO2023241467A1 WO 2023241467 A1 WO2023241467 A1 WO 2023241467A1 CN 2023099279 W CN2023099279 W CN 2023099279W WO 2023241467 A1 WO2023241467 A1 WO 2023241467A1
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WO
WIPO (PCT)
Prior art keywords
network
request
terminal device
network device
core network
Prior art date
Application number
PCT/CN2023/099279
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English (en)
Chinese (zh)
Inventor
王凡凡
耿婷婷
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023241467A1 publication Critical patent/WO2023241467A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/06—Registration at serving network Location Register, VLR or user mobility server

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method and communication device.
  • This application provides a communication method and communication device, which can reduce the service interruption time of terminal equipment and improve the reliability of communication.
  • this application provides a communication method, which is applied to access network equipment.
  • the method includes:
  • first request information is sent to the second core network device, and the first request information is used to request to start disaster roaming; wherein, the first core network device is located in the first network, and the second core network device The device is located in the second network, and the first network and the second network share access network equipment.
  • the method before receiving the registration request from the terminal device, the method further includes:
  • Receive first indication information and/or second indication information from the first core network device the first indication information is used to indicate activation of a disaster roaming function
  • the second indication information is used to indicate a network that supports disaster roaming.
  • a list where the network list includes the second network.
  • the disaster roaming function and the network list that supports disaster roaming are configured for the access network device through the first core network device, which is beneficial to the subsequent determination of the access network device.
  • the access network device directly initiates a disaster roaming request to a network that supports disaster roaming (for example, the second network where the second core network device is located).
  • first information is sent to the terminal device, and the first information instructs the terminal device to initiate a registration request for registration update.
  • the access network device when a disaster failure occurs in the first core network device, notifies the terminal device to initiate a registration update process to the first network through the first information (that is, the access network device triggers the terminal device to initiate a registration update process ),use
  • the access network equipment serves the terminal equipment through the core network of the second network (i.e., the second core network equipment), thereby avoiding the terminal equipment's perception of disaster roaming and enabling the terminal equipment on the affected network to operate in other normal networks.
  • Business continuity shortens the service interruption time of terminal equipment.
  • the method before receiving the registration request from the terminal device, the method further includes:
  • the RRC release message includes a first parameter, and the first parameter is used to determine the time when the terminal device initiates an RRC establishment request.
  • the method further includes:
  • the access network equipment releases the connected terminal equipment to the idle state, and the terminal equipment reconnects to the access network equipment on the first network, and then accesses the network.
  • the device connects the terminal device to the second network through the second request information, and then the second core network device triggers the terminal device to initiate a registration update process to the first network.
  • the terminal device is not aware of disaster roaming, thus shortening the time required for the terminal device. business interruption time, improving communication reliability.
  • the second request information is carried in the initial UE message.
  • a registration request is received from the terminal device.
  • the registration request is used to request registration to the second core network device; wherein the first core network device is located in the first network, and the second core network device The device is located in the second network, and the first network and the second network share access network equipment.
  • the embodiment of this application proposes another disaster roaming mechanism under the network sharing architecture.
  • the terminal device can sense disaster roaming, so the terminal device can directly initiate a disaster roaming request to the second network to the access network device. This in turn helps improve communication reliability.
  • the RRC release message includes first indication information, and the first indication information is used to indicate starting disaster roaming.
  • the RRC release message includes second indication information
  • the second indication information is used to indicate a network list that supports disaster roaming
  • the network list includes the second network.
  • this application provides a communication method, which method is applied to a terminal device.
  • the method includes:
  • a registration request is sent to the access network device.
  • the registration request is used to request registration to the second core network device; wherein the first core network device is located in the first network, and the second core network device
  • the network equipment is located in the second network, and the first network and the second network share access network equipment.
  • the RRC release message includes first indication information, and the first indication information is used to indicate starting disaster roaming.
  • the method further includes:
  • sending a registration request to the access network device includes:
  • the RRC release message includes second indication information
  • the second indication information is used to indicate a network list that supports disaster roaming
  • the network list includes the second network.
  • this application provides a communication device, which is an access network device, and the device includes:
  • a transceiver unit configured to receive a registration request from the terminal device, where the registration request is used to request registration to the first core network device;
  • the transceiver unit is configured to send first request information to a second core network device based on the registration request, where the first request information is used to request to start disaster roaming; wherein the first core network device is located in the first network , the second core network equipment is located in the second network, and the first network and the second network share access network equipment.
  • Receive first indication information and/or second indication information from the first core network device the first indication information is used to indicate activation of a disaster roaming function
  • the second indication information is used to indicate a network that supports disaster roaming.
  • a list where the network list includes the second network.
  • the transceiver unit is also used to:
  • first information is sent to the terminal device, and the first information instructs the terminal device to initiate a registration request for registration update.
  • the processing unit is configured to send a radio resource control RRC release message to the terminal device through the transceiver unit when it is determined that the first core network device is unavailable;
  • the RRC release message includes a first parameter, and the first parameter is used to determine the time when the terminal device initiates an RRC establishment request.
  • the transceiver unit is also used to:
  • the first request information is carried in an initial UE context message.
  • the second request information is carried in the initial UE message.
  • a processing unit configured to send a radio resource control RRC release message to the terminal device through the transceiver unit when it is determined that the first core network device is unavailable;
  • the transceiver unit is configured to receive an RRC establishment request from the terminal device;
  • the transceiver unit is configured to receive a registration request from a terminal device after the RRC connection is successfully established.
  • the registration request is used to request registration to the second core network device; wherein the first core network device is located in the first network , the second core network equipment is located in the second network, and the first network and the second network share access network equipment.
  • the RRC release message includes first indication information, and the first indication information is used to indicate starting disaster roaming.
  • the RRC release message includes second indication information
  • the second indication information is used to indicate a network list that supports disaster roaming
  • the network list includes the second network.
  • the transceiver unit is also used to:
  • the RRC release message includes first indication information, and the first indication information is used to indicate starting disaster roaming.
  • the present application provides a communication device, which may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device.
  • the communication device may also be a chip system.
  • the communication device can perform the method described in the third aspect.
  • the functions of the communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the unit or module may be software and/or hardware.
  • the operations and beneficial effects performed by the communication device can be referred to the method and beneficial effects described in the third aspect above, and repeated details will not be repeated.
  • the present application provides a communication device.
  • the device may be an access network device, a device in the access network device, or a device that can be used in conjunction with the access network device.
  • the communication device may also be a chip system.
  • the communication device can perform the method described in the first aspect and/or the second aspect.
  • the functionality of the communication device can be achieved through hardware Implementation can also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the unit or module may be software and/or hardware.
  • the operations and beneficial effects performed by the communication device can be referred to the methods and beneficial effects described in the above first aspect and/or the second aspect, and repeated descriptions will not be repeated.
  • the present application provides a communication device, which may be an access network device.
  • the communication device includes a processor and a transceiver.
  • the processor and the transceiver are configured to perform at least one in-memory storage.
  • the present application provides a communication device, which may be an access network device.
  • the communication device includes a processor, a transceiver, and a memory. Wherein, the processor, the transceiver and the memory are coupled; the processor and the transceiver are used to implement the method in any one of the first aspect and/or the second aspect.
  • Figure 2 is a schematic diagram of the air interface control plane protocol stack
  • Figure 5 is a schematic diagram of the network architecture of a shared network
  • Figure 6 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 7a is a schematic flowchart of a disaster roaming provided by an embodiment of the present application.
  • Figure 7c is a schematic flowchart of another disaster roaming provided by an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • At least one (item) means one or more
  • plural means two or more
  • at least two (items) means two or three and three
  • “and/or” is used to describe the relationship between associated objects, indicating that there can be three relationships.
  • a and/or B can mean: only A exists, only B exists, and A and B exist simultaneously. In this case, A and B can be singular or plural.
  • the character “/” generally indicates that the related objects are in an "or” relationship.
  • At least one of the following” or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
  • At least one of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c” ”, where a, b, c can be single or multiple.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • NR new radio
  • 3GPP 3rd generation partner project
  • SBA service-based architecture
  • 5th generation, 5G fifth generation
  • 6G sixth generation
  • a terminal device can access a wireless network to obtain services from an external network (such as a data network (DN)) through the wireless network, or communicate with other devices through the wireless network, such as with other terminals.
  • the wireless network includes a (radio)access network ((radio)access network, (R)AN) and a core network (core network, CN), where (R)AN (hereinafter described as RAN) is used to connect terminal devices
  • R radio access network
  • CN core network
  • CN core network
  • CN core network
  • CN core network
  • RAN core network
  • the terminal equipment, RAN, CN and DN involved in the system architecture in Figure 1a are described in detail below.
  • Terminal equipment includes equipment that provides voice and/or data connectivity to users.
  • terminal equipment is a device with wireless transceiver functions that can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on On the water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons, satellites, etc.).
  • Terminals can also be fixed or mobile. It can be understood that all or part of the functions of the terminal in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).
  • the RAN may include one or more RAN devices (or access network devices), and the interface between the access network device and the terminal device may be a Uu interface (or air interface).
  • RAN devices or access network devices
  • Uu interface or air interface
  • Access network equipment is a node or device that connects terminal equipment to a wireless network.
  • Access network equipment includes, but is not limited to, next generation node B (gNB) and evolved nodes in 5G communication systems.
  • B evolved node B, eNB
  • next generation evolved node B next generation evolved node B (next generation eNB, ng-eNB)
  • wireless backhaul equipment radio network controller (radio network controller, RNC), node B (node B, NB) , home base station ((home evolved nodeB, HeNB) or (home node B, HNB)), baseband unit (baseBand unit, BBU), transmitting and receiving point (TRP), transmitting point (TP) , mobile switching center, device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication equipment that assumes the base station function etc., it can also include the centralized unit (CU) and distributed unit (DU), non-terrest
  • the CN may include one or more CN devices (which may also be understood as network element devices or functional network elements or entities).
  • the CN may include the following functional network elements: network slice selection function (NSSF), network exposure function (NEF), network function repository function (NRF), policy control Function (policy control function, PCF), unified data management (UDM), application function (AF), authentication server function (AUSF), access and mobility management function (access and mobility management function (AMF), session management function (SMF), UE, (radio)access network ((radio)access network (R)AN), user plane function (UPF) and Data network (DN).
  • NSF network slice selection function
  • NEF network exposure function
  • NRF network function repository function
  • policy control Function policy control function
  • PCF policy control Function
  • UDM unified data management
  • AF application function
  • AUSF authentication server function
  • AMF access and mobility management function
  • SMF session management function
  • UE radio access network
  • R radio access network
  • UPF User Plane
  • DN Data network
  • each functional network element can be the name of each functional network element shown in Figure 1b.
  • each functional network element can be It is still the name of each functional network element shown in Figure 1b, or it may also have other names.
  • the policy control network element may be the PCF.
  • the policy control function may still be the PCF. Or it may have other names, which is not limited by this application.
  • the service interface provided by Nausf is the service interface provided by AUSF; the service interface provided by Namf is AMF; the service interface provided by Nsmf is SMF; N1 is the reference point between UE and AMF; N2 is (R)AN and AMF; N3 is the reference point between (R)AN and UPF; N4 is the reference point between SMF and UPF; N6 is the reference point between UPF and DN; N9 is the reference point between UPF Reference point.
  • Nnssf, Nnef, Nnrf, Npcf, Nudm, Naf, Nausf, Namf, Nsmf, N1, N2, N3, N4, N6, and N9 in Figure 1b can be found in the meanings defined in the relevant standard protocols. There are no restrictions here.
  • VPLMN includes: NSSF, NEF, NRF, PCF, AF, AMF, SMF, NSACF, UE, (R)AN, UPF and DN.
  • Nnssf is the service interface provided by NSSF
  • Nnef is the service interface provided by NEF
  • Nnrf is the service interface provided by NRF
  • Npcf is the service interface provided by PCF
  • Naf is the service interface provided by AF
  • Nudm is UDM.
  • FIG. 1c is a schematic structural diagram of another communication system.
  • the communication system is a system architecture in the 5G homerouted roaming scenario.
  • the communication system includes two public land mobile networks (public land mobile network, PLMN): VPLMN and HPLMN.
  • PLMN public land mobile network
  • VPLMN public land mobile network
  • HPLMN HPLMN
  • SEPP SEPP, denoted vSEPP and hSEPP respectively.
  • FIG 2 is a schematic diagram of the air interface control plane protocol stack.
  • NAS non-access stratum
  • AS access stratum
  • the AN message sent by the UE to (R)AN mainly includes AN parameters (AN parameter) and registration request (registration request), which mainly describes the relevant configuration and requirements of the UE .
  • SUCI Subscriber concealed identifier
  • 5G-GUTI 5G globally unique temporary identity
  • PEI permanent equipment identifier
  • the UE includes Mapping of Requested NSSAI to ensure that the network can verify whether the S-NSSAI in the Requested NSSAI is based on Subscribed S-NSSAIs.
  • the last visited tracking area identity (TAI) should be included in the registration request to help the AMF generate a registration area for the UE.
  • the initialization terminal context message is the N2 message sent by (R)AN to AMF.
  • the N2 message includes N2 parameters, registration request and [LTE-M Indication].
  • N2 parameters Contains PLMN ID, location information, cell identifier, and UE context request. (If the AN parameters sent by the UE to the RAN include the establishment reason and IAB-Indication)
  • Registration request (Same as the registration request sent by the UE to the RAN, it can be understood that the RAN only transparently transmits the NAS message)
  • LTE-M Indication AMF determines whether the UE is performing inter-system mobility to and from NB-IoT based on the RAT type. If the AMF receives the LTE M Indication, it considers the RAT Type to be LTE-M and stores the LTE-M indication in the UE context.
  • Version (release, R) 17 proposes the MINT mechanism, which is the disaster roaming mechanism. Specifically, it discusses a network architecture in which each operator's core network (CN) and radio access network (RAN) are independent. When a certain operator's RAN part fails, the CN When the part is still working normally, the UE can connect to other operators that provide disaster roaming services to reduce the UE's service interruption time. That is to say, when a disaster condition (DC) occurs in a public land mobile network (PLMN) in a region, it is assumed that only the radio access network (RAN) part of the PLMN Failure (that is, the core network (CN) part of the PLMN is still working normally), resulting in all UEs in the affected PLMN area losing coverage.
  • DC disaster condition
  • RAN public land mobile network
  • the MINT mechanism allows UEs of affected PLMNs (for example, PLMN1) to roam to other networks to access and obtain services in other networks (for example, PLMN2).
  • Figure 3 is a schematic diagram of a disaster roaming scenario under independent network construction by an operator.
  • PLMN1 includes AMF1 and gNB1
  • PLMN2 includes AMF2 and gNB2, where AMF1 is different from AMF2, and gNB1 is different from gNB2.
  • the UE obtains services by accessing PLMN1.
  • the UE disaster roams to PLMN2 to obtain services.
  • AMF1 sends a disaster roaming activation instruction (disaster roaming activation) to the UE, and the list of PLMNs used under the DC (that is, the list of PLMNs that support disaster roaming) network list), PLMN availability, etc., where the disaster roaming activation indication is used to indicate whether An indication of whether Disaster roaming is enabled.
  • gNB2 broadcasts indication information to the UEs of the affected PLMN through system messages. The indication information is used to indicate whether the UE of PLMN 1 can perform Disaster roaming. If so, then the UE of PLMN 1 can send a message to AMF2 when DC occurs.
  • the registration request includes a disaster roaming instruction.
  • PLMN 2 receives the registration request and determines whether it supports disaster roaming services for users under the PLMN where DC occurs based on the information included in the registration request.
  • Telecom network infrastructure includes site infrastructure such as site, computer room facilities, towers, and power supply equipment.
  • Network equipment includes facilities related to telecommunications network equipment such as base stations, transmission, and core networks.
  • MVNO Mobile Virtual Network Operator
  • MNO Mobile Network Operator
  • Figure 5 is a schematic diagram of the network architecture of a shared network.
  • multiple operators such as operator A and operator B
  • OSS Operations support system
  • the current 3GPP protocol TS 23.501 only supports the 5GMulti-Operator Core Network (5G MOCN) network sharing architecture, that is, the core network sides of multiple operators are independent, but the RAN side network is shared.
  • 5G MOCN 5G Multi-Operator Core Network
  • this application proposes a communication method, which proposes a disaster roaming mechanism under a shared network architecture, which is conducive to improving the reliability of communication.
  • FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the first core network device is located in the first network
  • the second core network device is located in the second network
  • the first network and the second network share access network equipment
  • the terminal device is the first network device.
  • Network contract terminal As shown in Figure 6, the communication method includes the following steps S601 to S602:
  • the terminal device sends a registration request to the access network device.
  • the access network device receives the registration request from the terminal device.
  • the registration request is used to request registration to the first core network device.
  • the access network device may send first information to the terminal device, where the first information instructs the terminal device to initiate a registration request for registration update.
  • the terminal device receives the first information from the access network device, and sends a registration request to the access network device in response to the first information.
  • the access network device may receive a registration request from the terminal device, where the registration request is used to request registration with the first core network device.
  • the access network device when the access network device determines that the first core network device is unavailable, the access network device sends an RRC release message to the terminal device.
  • the terminal device receives the RRC release message from the access network device to release the terminal device to enter the RRC_IDLE state.
  • the RRC release message may include a first parameter, which is used to Determine the time when the terminal device initiates the RRC establishment request. For example, taking the first parameter as the time length, the terminal device can first generate a random value (random value) based on the stored disaster roaming wait range (disaster roaming wait range), and then wait for (random value * first parameter) After the duration, an RRC establishment request is sent.
  • the access network device receives the RRC establishment request from the terminal device, and then establishes an RRC connection with the terminal device based on the RRC establishment request. After the RRC connection is successfully established, the terminal device may send a registration request to the access network device, where the registration request is used to request to register with the first core network device. Correspondingly, the access network device receives the registration request from the terminal device.
  • the access network device when the access network device determines that the first core network device is unavailable, the access network device sends an RRC release message to the terminal device.
  • the terminal device receives the RRC release message from the access network device to release the terminal device to enter the RRC_IDLE state.
  • the terminal device can generate a random value (random value) based on the stored disaster roaming wait range (disaster roaming wait range), and after waiting for the random value, send an RRC establishment request to the access network device.
  • the access network device receives the RRC establishment request from the terminal device, and then establishes an RRC connection with the terminal device based on the RRC establishment request.
  • the second request information involved in this application can also be carried in the initialization terminal context message.
  • the access network device involved in the embodiment of the present application determines that the first core network device is unavailable, which can also be described as the access network device determines that DC occurs on the first core network device.
  • the first core network device may send the first indication information and/or the second indication information to the access network device.
  • the access network device receives data from the first core network device.
  • the first indication information and/or the second indication information of the network device The first indication information is used to indicate activation of the disaster roaming function, and the second indication information is used to indicate a network list that supports disaster roaming, and the network list includes the second network.
  • the network management device of the first network may also send the first indication information and/or the second indication information to the access network device.
  • the access network device receives the The first indication information and/or the second indication information of the network management device.
  • the access network device sends the first request information to the second core network device based on the registration request.
  • the second core network device receives the first request information from the access network device.
  • the first request information is used to request to start disaster roaming. It can be understood that the above first request information may be carried in the initialization terminal context message.
  • the second core network device may determine whether to support disaster roaming of the terminal device after receiving the first request information. Specifically, the second core network device can determine whether to support disaster roaming of the terminal device according to the content in Chapter 4.2.2.2.2 of the protocol TS 23.502, which will not be described again here.
  • AMF1 sends the first indication information and/or the second indication information to gNB.
  • gNB receives the first indication information and/or the second indication information from AMF1.
  • AMF1 It is the first indication information and/or the second indication information configured for gNB before the AMF1 failure occurs.
  • the following steps S72a to S74a can also be performed:
  • the gNB sends the first information to the UE.
  • the UE receives the first information from the gNB.
  • the first information instructs the UE to initiate a registration request.
  • the UE In response to the first information, the UE sends a registration request to the gNB.
  • the gNB receives a registration request from the UE, which is used to request registration to AMF1.
  • gNB sends an initialization terminal context message to AMF2.
  • the initializing terminal context message includes first request information, and the first request information is used to request to start disaster roaming.
  • AMF2 receives the initialization terminal context message from gNB and determines whether disaster roaming of the terminal device is supported.
  • Figure 7b is a schematic flowchart of another disaster roaming provided by an embodiment of the present application.
  • AMF1 is the core network AMF of the first network (for example, PLMN1)
  • AMF2 is the core network AMF of the second network (for example, PLMN2)
  • gNB is the shared base station of the first network and the second network.
  • AMF1 sends the first indication information and/or the second indication information to gNB.
  • gNB receives the first indication information and/or the second indication information from AMF1.
  • AMF1 is the first indication information and/or the second indication information configured for gNB before the AMF1 failure occurs. Further, when the AMF1 fault occurs, the following steps S72b to S75b can also be performed:
  • gNB sends an RRC release message to the UE.
  • the UE receives the RRC release message from the gNB and releases the UE to enter the RRC_IDLE state.
  • the RRC release message includes the first parameter.
  • the UE After determining that the waiting time requirement is met according to the first parameter, the UE sends an RRC establishment request to the gNB.
  • the gNB receives the RRC establishment request from the UE to perform the RRC establishment process, that is, to re-establish the RRC connection with the UE.
  • the UE After the RRC is successfully established, the UE sends a registration request to the gNB.
  • the gNB receives a registration request from the gNB, which is used to request registration to AMF1.
  • gNB sends an initialization terminal context message to AMF2.
  • the initializing terminal context message includes first request information, and the first request information is used to request to start disaster roaming.
  • AMF2 receives the initialization terminal context message from gNB and determines whether disaster roaming of the terminal device is supported.
  • FIG. 7c is a schematic flow chart of another disaster roaming provided by an embodiment of the present application.
  • AMF1 is the core network AMF of the first network (for example, PLMN1)
  • AMF2 is the core network AMF of the second network (for example, PLMN2)
  • gNB is the shared base station of the first network and the second network.
  • AMF1 sends the first indication information and/or the second indication information to gNB.
  • gNB receives the first indication information and/or the second indication information from AMF1.
  • AMF1 is the first indication information and/or the second indication information configured for gNB before the AMF1 failure occurs. Further, when the AMF1 fault occurs, the following steps S72c to S77c can also be performed:
  • the UE receives the RRC release message from the gNB and releases the UE to enter the RRC_IDLE state.
  • the UE sends an RRC establishment request to the gNB.
  • the gNB receives the RRC establishment request from the UE to perform the RRC establishment process, that is, to re-establish the RRC connection with the UE.
  • gNB After the RRC connection is successfully established, gNB sends an initialization terminal context message to AMF2.
  • AMF2 receives an initialization terminal context message from gNB.
  • the initialization terminal context message includes second request information.
  • the second request information is used to request to register the terminal device to AMF1.
  • AMF2 transparently transmits the first information to the UE through gNB.
  • the UE receives the first information.
  • the UE In response to the first information, the UE sends a registration request to the gNB.
  • the gNB receives a registration request from the UE, which is used to request registration to AMF1.
  • gNB sends an initialization terminal context message to AMF2.
  • the initializing terminal context message includes first request information, and the first request information is used to request to start disaster roaming.
  • AMF2 receives the initialization terminal context message from gNB and determines whether disaster roaming of the terminal device is supported.
  • Figure 7d is a schematic flowchart of another disaster roaming provided by an embodiment of the present application.
  • AMF1 is the core network AMF of the first network (for example, PLMN1)
  • AMF2 is the core network AMF of the second network (for example, PLMN2)
  • gNB is the shared base station of the first network and the second network.
  • AMF1 sends the first indication information and/or the second indication information to gNB.
  • gNB receives the first indication information and/or the second indication information from AMF1.
  • AMF1 is the first indication information and/or the second indication information configured for gNB before the AMF1 failure occurs. Further, when the AMF1 fault occurs, the following steps S72d to S77d can also be performed:
  • the UE receives the RRC release message from the gNB and releases the UE to enter the RRC_IDLE state.
  • the gNB receives the RRC establishment request from the UE to perform the RRC establishment process, that is, to re-establish the RRC connection with the UE.
  • AMF2 receives an initialization terminal context message from gNB.
  • the initialization terminal context message includes second request information.
  • the second request information is used to request to register the terminal device to AMF1.
  • the initialization terminal context message may also include information related to PLMN1.
  • AMF2 transparently transmits the first information to the UE through gNB.
  • the UE receives the first information.
  • the gNB receives a registration request from the UE, which is used to request registration to AMF1.
  • gNB sends an initialization terminal context message to AMF2.
  • the initialization terminal context message includes information related to PLMN1.
  • AMF2 receives the initialization terminal context message from gNB, wherein the information related to PLMN1 (such as the identification of PLMN1) included in the initialization terminal context message is the same as the information related to PLMN1 included in the initialization terminal context message in step S73d. (for example, the identity of PLMN1) is the same. Therefore, AMF2 can determine whether disaster roaming of the terminal device is supported. That is to say, when AMF2 determines that the PLMN-related information, such as the PLMN identity, included in the initialization terminal context messages received twice consecutively is the same, it can be determined that the terminal device needs to perform disaster roaming. Therefore, AMF2 can determine whether disaster roaming of the terminal device is supported.
  • the access network device determines that the core network part of the first network (for example, the first core network device) fails and receives a request from the terminal device to register with the first core network device
  • the access network device requests disaster roaming from the second core network device based on the registration request, and the terminal device is not aware of disaster roaming during this process (that is, the terminal device does not directly contact the second core network that provides disaster roaming).
  • device initiates a registration request), therefore, the terminal device does not need to perform the process of PLMN search and cell selection, which shortens the service interruption time of the terminal device and helps improve the reliability of communication.
  • FIG. 8 is another schematic flowchart of a communication method provided by an embodiment of the present application. It should be noted that in this embodiment of the present application, the first core network device is located in the first network, the second core network device is located in the second network, and the first network and the second network share access network equipment. As shown in Figure 8, the communication method includes the following steps S801 to S802:
  • the access network device sends an RRC release message to the terminal device.
  • the terminal device receives the RRC release information from the access network device to release the terminal device to enter the RRC_IDLE state.
  • the RRC release message may include first indication information, and the first indication information is used to instruct to start disaster roaming.
  • the RRC release message also includes second indication information.
  • the second indication information is used to indicate a network list that supports disaster roaming, and the network list includes the second network.
  • the unavailability of the first core network device can also be described as DC occurring on the first core network device.
  • the first core network device may also send the first indication information and/or the second indication information to the terminal device.
  • the terminal device receives the instruction from the first core network device.
  • first indication information is used to indicate activation of the disaster roaming function
  • the second indication information is used to indicate a network list that supports disaster roaming, and the network list includes the second network.
  • the network management device of the first network may also send the first indication information and/or the second indication information to the terminal device.
  • the terminal device receives the command from the network management device. first indication information and/or second indication information.
  • the terminal device sends an RRC establishment request to the access network device.
  • the access network device receives the RRC establishment request from the terminal device.
  • the access network device may establish an RRC connection with the terminal device based on the RRC establishment request.
  • the terminal device After the RRC connection is successfully established, the terminal device sends a registration request to the access network device. Correspondingly, the access network device receives the registration request from the terminal device. The registration request is used to request registration with the second core network device.
  • the terminal device when the RRC release message does not carry the first indication information and the second indication information, the terminal device enters the RRC_IDLE state after receiving the RRC release message, and then the terminal device performs PLMN search and cell selection.
  • PLMN search and cell selection When no selection is available, When a cell of the first network is selected to obtain a cell of the second network, the disaster roaming function is automatically activated, an RRC connection is established based on the RRC establishment request, and then a registration request to register with the second core network device is sent to the access network device.
  • the terminal device when the RRC release message carries the first indication information but does not carry the second indication information, the terminal device enters the RRC_IDLE state after receiving the RRC release message. Then the terminal device activates the disaster roaming function according to the first instruction information, and when performing PLMN search and cell selection, the terminal device is prevented from trying to search for a cell on the first network. If the terminal device can choose to obtain a cell on the second network, the RRC is established based on the RRC establishment request. connection, and then the terminal device can send a registration request to the access network device to register with the second core network device.
  • the terminal device when the RRC release message carries the first indication information and the second indication information, the terminal device enters the RRC_IDLE state after receiving the RRC release message. Then the terminal device activates the disaster roaming function according to the first instruction information, determines a second network that supports disaster roaming according to the second instruction information, selects a cell belonging to the second network, and then establishes an RRC connection based on the RRC establishment request, and then sends the request to the access network device Send a registration request to register to the second core network device.
  • the terminal device can sense disaster roaming, so the terminal device can directly initiate to the access network device to the second network disaster roaming request, which is helpful to improve the reliability of communication.
  • the communication device provided by the present application will be described in detail below with reference to FIGS. 9 to 12 .
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device shown in Figure 9 can be used to perform some or all functions of the terminal device in the method embodiments described in Figures 6 to 8.
  • the device may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 9 may include a transceiver unit 901 and a processing unit 902. Among them, the processing unit 902 is used for data processing.
  • the transceiver unit 901 integrates a receiving unit and a sending unit.
  • the transceiver unit 901 may also be called a communication unit. Alternatively, the transceiver unit 901 may also be split into a receiving unit and a transmitting unit.
  • the following processing unit 902 and transceiver unit 901 are the same, and will not be described again below. in:
  • Transceiver unit 901 configured to receive radio resource control RRC release information from the access network device
  • the transceiver unit 901 is configured to send an RRC establishment request to the access network device;
  • the transceiver unit 901 is configured to send a registration request to the access network device after the RRC connection is successfully established.
  • the registration request is used to request registration to the second core network device; wherein the first core network device is located at the first core network device.
  • a network, the second core network equipment is located in the second network, and the first network and the second network share access network equipment.
  • the RRC release message includes first indication information, and the first indication information is used to indicate starting disaster roaming.
  • the device further includes a processing unit 902:
  • the processing unit 902 is configured to initiate disaster roaming when the first network cannot be searched.
  • the transceiver unit 901 is used to:
  • the RRC release message includes second indication information
  • the second indication information is used to indicate a network list that supports disaster roaming
  • the network list includes the second network.
  • FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the communication device shown in Figure 10 can be used to perform some or all functions of the access network equipment in the method embodiments described in Figures 6 to 8.
  • the device may be an access network device, a device in the access network device, or a device that can be used in conjunction with the access network device.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 10 may include a transceiver unit 1001 and a processing unit 1002. in:
  • Transceiver unit 1001 configured to receive a registration request from a terminal device, where the registration request is used to request registration to the first core network device;
  • the transceiver unit 1001 is configured to send first request information to a second core network device based on the registration request, where the first request information is used to request to start disaster roaming; wherein the first core network device is located in the first network, the second core network equipment is located in the second network, and the first network and the second network share access network equipment.
  • the transceiver unit 1001 is also used to:
  • Receive first indication information and/or second indication information from the first core network device the first indication information is used to indicate activation of a disaster roaming function
  • the second indication information is used to indicate a network that supports disaster roaming.
  • a list where the network list includes the second network.
  • the transceiver unit 1001 is also used to:
  • first information is sent to the terminal device, and the first information instructs the terminal device to initiate a registration request for registration update.
  • the device further includes a processing unit 1002;
  • the processing unit 1002 is configured to send a radio resource control RRC release message to the terminal device through the transceiver unit 1001 when it is determined that the first core network device is unavailable;
  • the transceiver unit 1001 is configured to receive an RRC establishment request from the terminal device;
  • the processing unit 1002 is configured to establish an RRC connection with the terminal device based on the RRC establishment request.
  • the RRC release message includes a first parameter, and the first parameter is used to determine the time when the terminal device initiates an RRC establishment request.
  • the transceiver unit 1001 is also used to:
  • the first request information is carried in the initial UE message.
  • the second request information is carried in the initial UE message.
  • the processing unit 1002 is configured to send a radio resource control RRC release message to the terminal device through the transceiver unit 1001 when it is determined that the first core network device is unavailable;
  • the transceiver unit 1001 is configured to receive an RRC establishment request from the terminal device;
  • the transceiver unit 1001 is configured to receive a registration request from a terminal device after the RRC connection is successfully established.
  • the registration request is used to request registration to the second core network device; wherein the first core network device is located in the first network, the second core network equipment is located in the second network, and the first network and the second network share access network equipment.
  • the RRC release message includes first indication information, and the first indication information is used to indicate starting disaster roaming.
  • the RRC release message includes second indication information
  • the second indication information is used to indicate a network list that supports disaster roaming
  • the network list includes the second network.
  • the transceiver unit 1001 is also used to:
  • FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the communication device may be the terminal device described in the embodiment of the present application, and is used to implement the functions of the terminal device in the above-mentioned FIGS. 6 to 8 .
  • FIG. 11 shows only the main components of the terminal device 1100.
  • the terminal device 1100 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control the entire terminal device 1100, execute software programs, and process data of the software programs.
  • Memory is mainly used to store software programs and data.
  • the control circuit is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, microphones, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent and outputs the baseband signal to the control circuit.
  • the control circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna.
  • the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into data and processes the data. .
  • terminal device 1100 may include multiple processors and memories.
  • the memory may also be called a storage medium or a storage device, which is not limited in this embodiment of the present invention.
  • the processor may include a baseband processor and a central processor.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processor is mainly used to control the entire terminal device 1100. Execute software programs and process data from software programs.
  • the processor in Figure 11 integrates the functions of a baseband processor and a central processor. Those skilled in the art can understand that the baseband processor and the central processor can also be independent processors and are interconnected through technologies such as buses.
  • the terminal device 1100 may include multiple baseband processors to adapt to different network standards, the terminal device 1100 may include multiple central processors to enhance its processing capabilities, and various components of the terminal device 1100 may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing communication protocols and communication data can be built into the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and the control circuit with the transceiver function can be regarded as the transceiver unit 1110 of the terminal device 1100
  • the processor with the processing function can be regarded as the processing unit 1120 of the terminal device 1100
  • the terminal device 1100 includes a transceiver unit 1110 and a processing unit 1120.
  • the transceiver unit may also be called a transceiver, a transceiver, a transceiver device, etc.
  • the devices used to implement the receiving function in the transceiver unit 1110 can be regarded as a receiving unit
  • the devices used in the transceiver unit 1110 used to implement the transmitting function can be regarded as a sending unit.
  • the transceiver unit 1110 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, a transmitting circuit, etc.
  • the communication device can be the network equipment (such as access network equipment or core network equipment) described in the embodiments of the present application, and is used to implement the functions of the network equipment in Figures 6 to 8 mentioned above.
  • the network equipment includes: baseband device 121, radio frequency device 122, and antenna 123.
  • the radio frequency device 122 receives the information sent by the terminal device through the antenna 123, and sends the information sent by the terminal device to the baseband device 121 for processing.
  • the baseband device 121 processes the information of the terminal equipment and sends it to the radio frequency device 122.
  • the radio frequency device 122 processes the information of the terminal equipment and then transmits it through the antenna 123. to the terminal device.
  • the baseband device 121 includes one or more processing units 1211, a storage unit 1212 and an interface 1213.
  • the processing unit 1211 is used to support the network device to perform the functions of the network device in the above method embodiment.
  • the storage unit 1212 is used to store software programs and/or data.
  • the interface 1213 is used to exchange information with the radio frequency device 122.
  • the interface includes an interface circuit for input and output of information.
  • the processing unit is an integrated circuit, such as one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the storage unit 1212 and the processing unit 1211 may be located in the same chip, that is, an on-chip storage element. Alternatively, the storage unit 1212 and the processing unit 1211 may be on different chips from the processing unit 1211, that is, off-chip storage elements.
  • the storage unit 1212 may be one memory, or may be a collective name for
  • the network device may implement some or all of the steps in the above method embodiments in the form of one or more processing unit schedulers. For example, the corresponding functions of the network equipment in Figures 6 to 8 are implemented.
  • the one or more processing units may support wireless access technologies of the same standard, or may support wireless access technologies of different standards.
  • Embodiments of the present application also provide a computer-readable storage medium. Instructions are stored in the computer-readable storage medium. When the instruction is run on a processor, the method flow of the above method embodiment is implemented.
  • An embodiment of the present application also provides a computer program product.
  • the computer program product is run on a processor, the method flow of the above method embodiment is implemented.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical functional division.
  • the units described as separate components may or may not be physically separated.
  • the components shown may or may not be physical units, that is, they may be located in one place, or they may be distributed over multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • computer-readable media may include random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), Erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read only memory (EEPROM), compact disc read-only memory (CD- ROM), universal serial bus flash disk, portable hard disk, or other optical disk storage, magnetic disk storage media, or other magnetic storage devices, or can be used to carry or store desired data in the form of instructions or data structures. program code and any other medium that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • PROM programmable ROM
  • EPROM Erasable programmable read-only memory
  • EEPROM electrically erasable programmable read only memory
  • CD- ROM compact disc read-only memory
  • universal serial bus flash disk portable hard disk, or other optical disk storage, magnetic disk storage media, or other magnetic storage devices, or can be used to carry or store desired data in the form of instructions or data structures.
  • RAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous link dynamic random access memory direct memory bus random access memory (direct rambus RAM, DR RAM).

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Abstract

La présente demande concerne un procédé de communication et un appareil de communication. Le procédé consiste : à recevoir une demande d'enregistrement en provenance d'un dispositif terminal, la demande d'enregistrement étant utilisée pour demander un enregistrement à un premier dispositif de réseau central ; et à envoyer des premières informations de demande à un second dispositif de réseau central sur la base de la demande d'enregistrement, les premières informations de demande étant utilisées pour demander le démarrage d'une itinérance en cas de catastrophe. Le premier dispositif de réseau central est situé dans un premier réseau, le second dispositif de réseau central est situé dans un second réseau, et le premier réseau et le second réseau partagent un dispositif de réseau d'accès. La présente demande fournit un mécanisme d'itinérance en cas de catastrophe sous l'architecture d'un réseau partagé, ce qui réduit le temps d'interruption de service d'un dispositif terminal et facilite une amélioration de la fiabilité de communication.
PCT/CN2023/099279 2022-06-16 2023-06-09 Procédé de communication et appareil de communication WO2023241467A1 (fr)

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