WO2024067200A1 - 通信方法、装置以及系统 - Google Patents

通信方法、装置以及系统 Download PDF

Info

Publication number
WO2024067200A1
WO2024067200A1 PCT/CN2023/119381 CN2023119381W WO2024067200A1 WO 2024067200 A1 WO2024067200 A1 WO 2024067200A1 CN 2023119381 W CN2023119381 W CN 2023119381W WO 2024067200 A1 WO2024067200 A1 WO 2024067200A1
Authority
WO
WIPO (PCT)
Prior art keywords
indication information
relay node
mobile relay
access network
amf
Prior art date
Application number
PCT/CN2023/119381
Other languages
English (en)
French (fr)
Inventor
朱方园
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 WO2024067200A1 publication Critical patent/WO2024067200A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data

Definitions

  • the present application relates to the field of communication technology, and more specifically, to a communication method, device and system.
  • the so-called IAB base station is a base station that integrates wireless access link and wireless backhaul link, where the access link is the communication link between the user equipment (UE) and the IAB base station, and the wireless backhaul link is the communication link between the IAB base stations, which mainly performs data backhaul, and the IAB base station does not require a wired transmission network for data backhaul. Therefore, the IAB base station reduces the deployment requirements for the wired transmission network and can be deployed in scenarios such as outdoor and indoor where it is not easy to deploy a wired transmission network.
  • MSBR mobile base station relay
  • MSBR mobile base station relay
  • TAC tracking area code
  • the new IAB host node needs to obtain the core network access and mobility management function (AMF) corresponding to each UE accessing the MBSR, and determine whether the new IAB host node is stored in the N2 interface with each AMF. If not, the new IAB host node can indicate that the TAC broadcast by the MBSR needs to be changed. At this time, the UE can perform mobility registration update, so that the network side can know the current location of the UE.
  • AMF core network access and mobility management function
  • the initial IAB host node needs to store it in the MBSR context.
  • the initial IAB host node needs to send the MBSR context containing all UE-AMF IDs to the new IAB host node, which may lead to the risk of exposing the UE context. Therefore, the above method needs to be further optimized.
  • the embodiments of the present application provide a communication method, device, and system, which enable a mobile relay node to more simply and effectively determine whether a broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • a communication method is provided, which is applied to a communication system including a mobile relay node and at least two access network devices, the method comprising: in a process of a mobile relay node moving from a first access network device to a second access network device, the first access network device receives first indication information sent by a first access and mobility management function AMF, the first indication information being used to indicate that a redirection has occurred in the AMF serving the mobile relay node; the first access network device sends second indication information to the mobile relay node based on the first indication information, the second indication information being used to instruct the mobile relay node to change a broadcast tracking area code TAC.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node, or a mobile base station relay MBSR node, and the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT.
  • the access network device may also be referred to as an IAB host node or an IAB host base station in this application.
  • the first AMF can select a second AMF according to the second access network device identifier, that is, AMF redirection occurs.
  • the first AMF is the AMF that serves the mobile relay node before the AMF redirection occurs.
  • the second AMF is the AMF that serves the mobile relay node after the AMF redirection occurs.
  • the first access network device in the process of the mobile relay node moving from the first access network device to the second access network device, can send a second indication message to the mobile relay node when it learns that AMF redirection has occurred through the first indication message. In this way, the mobile relay node can more simply and effectively determine whether the broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • the first access network device receives first indication information sent by the first AMF, including: the first access network device receives a switching command message sent by the first AMF, and the switching command message includes the first indication information.
  • the first indication information is carried by a switching command message sent by the first AMF.
  • the first access network device can obtain the first indication information, thereby sending indication information of changing the TAC to the mobile relay node.
  • the method before the first access network device receives the first indication information sent by the first AMF, the method also includes: the first access network device receives a first request message sent by the mobile relay node, and the first request message includes: third indication information, and the third indication information is used to indicate that the mobile relay node has mobility.
  • the first access network device can learn from the third indication information that the mobile relay node has mobility, so as to facilitate the subsequent sending of indication information for changing the TAC to the mobile relay node.
  • the first access network device sends second indication information to the mobile relay node based on the first indication information, including: the first access network device sends second indication information to the mobile relay node based on the first indication information and the third indication information.
  • the first access network device can send indication information of changing the TAC to the mobile relay node only after learning that the mobile relay node has mobility and receiving the first indication information.
  • a communication method is provided, the method being applied to a communication system including a mobile relay node and at least two access network devices, the method comprising: in the process of the mobile relay node moving from a first access network device to a second access network device, the second access network device receiving fourth indication information and fifth indication information sent by a second AMF, the fourth indication information being used to indicate that the mobile relay node has mobility, and the fifth indication information being used to indicate that the AMF serving the mobile relay node has been redirected.
  • the second access network device sends sixth indication information to the mobile relay node based on the fourth indication information and the fifth indication information, the sixth indication information being used to instruct the mobile relay node to change a broadcast TAC.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node, or a mobile base station relay MBSR node, and the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT.
  • the second access network device in the process of a mobile relay node moving from a first access network device to a second access network device, when the second access network device learns that the mobile relay node has mobility and AMF redirection has occurred, the second access network device can send an indication message of changing the TAC to the mobile relay node. In this way, the mobile relay node can more simply and effectively determine whether the broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • the method before the second access network device sends the sixth indication information to the mobile relay node according to the fourth indication information and the fifth indication information, the method also includes: the second access network device locally saves the seventh indication information according to the fourth indication information and the fifth indication information, and the seventh indication information is used to indicate that the mobile relay node needs to change the TAC; the second access network device receives a second request message sent by the mobile relay node, and the second request message is used to establish a link between the second access network device and the mobile relay node; the second access network device sends the sixth indication information to the mobile relay node according to the fourth indication information and the fifth indication information, including: the second access network device sends a second response message to the mobile relay node according to the second request message and the seventh indication information, and the second response message includes the sixth indication information.
  • the seventh indication information may be flag information or a flag bit.
  • the second request message may be an F1 establishment request message
  • the second response message may be an F1 establishment response message
  • the second access network device when the second access network device learns that the mobile relay node has mobility and AMF redirection occurs, the second access network device can learn that the mobile relay node needs to change the TAC and locally store the seventh indication information. After the second access network device receives the second request message sent by the mobile relay node, the second access network device can send the indication information of changing the TAC to the mobile relay node.
  • a communication method is provided, which is applied to a communication system including a mobile relay node and at least two access network devices, the method comprising: a second AMF receives a context of a mobile relay node sent by a first AMF, the context of the mobile relay node being used to indicate that the mobile relay node has mobility; the second AMF sends a message to the first AMF according to the context of the mobile relay node.
  • the mobile relay node sends sixth indication information, where the sixth indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node, or a mobile base station relay MBSR node, and the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT.
  • the context of the mobile relay node may be the context of the MT in the mobile relay node.
  • the second AMF in the process of the mobile relay node moving from the first access network device to the second access network device, when the second AMF learns that the mobile relay node has mobility, the second AMF can send indication information of changing the TAC to the mobile relay node. In this way, the mobile relay node can more simply and effectively determine whether the broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • the second AMF sends sixth indication information to the mobile relay node based on the context of the mobile relay node, including: the second AMF receives a registration request message sent by the mobile relay node; the second AMF sends a registration acceptance message to the mobile relay node based on the context of the mobile relay node and the registration request message, and the registration acceptance message includes the sixth indication information.
  • the second AMF when the second AMF receives a registration request message sent by a mobile relay, it sends a registration acceptance message to the mobile relay, and carries sixth indication information in the registration acceptance message, thereby instructing the mobile relay node to change the broadcast TAC.
  • the method before the second AMF receives the registration request message sent by the mobile relay, the method also includes: the second AMF locally saves seventh indication information according to the context of the mobile relay node, and the seventh indication information is used to indicate that the mobile relay node needs to change TAC; the second AMF sends a registration acceptance message to the mobile relay according to the context of the mobile relay node and the registration request message, including: the second AMF sends the registration acceptance message to the mobile relay node according to the registration request message and the seventh indication information.
  • the second AMF when the second AMF learns that the mobile relay node has mobility, the second AMF can learn that the mobile relay node needs to change the TAC and locally store the seventh indication information. After the second AMF receives the registration request message sent by the mobile relay node, the second AMF can send the indication information of changing the TAC to the mobile relay node.
  • a communication method is provided, which is applied to a communication system including a mobile relay node and at least two access network devices, and the method includes: the mobile relay node broadcasts a first TAC; the mobile relay node moves from the first access network device to the second access network device; the mobile relay node receives second indication information or sixth indication information sent by the first device, and the second indication information or the sixth indication information is used to indicate the changed TAC of the mobile relay node; the mobile relay node broadcasts a second TAC according to the second indication information or the sixth indication information.
  • the first device is any one of a first access network device, a second access network device, or a second AMF.
  • the mobile relay node when the mobile relay node moves from the first access network device to the second access network device, it can change the broadcast TAC after receiving the second indication information or the sixth indication information sent by the first device. In this way, the mobile relay node can more simply and effectively determine whether the broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • the first device is the first access network device
  • the mobile relay node receives the second indication information or the sixth indication information sent by the first device, including: the mobile relay node receives a switching command message or an F1 configuration update message sent by the first access network device, and the switching command message or the F1 configuration update message includes the second indication information.
  • the mobile relay node when the first device is a first access network device, can receive a switching command message or an F1 configuration update message sent by the first access network device, which carries second indication information, so that the mobile relay node changes the broadcast TAC according to the second indication information.
  • the method before the mobile relay node receives the switching command message or F1 configuration update message sent by the first access network device, the method also includes: the mobile relay node sends a first request message to the first access network device, and the first request message includes: third indication information, and the third indication information is used to indicate that the mobile relay node has mobility.
  • the mobile relay node before the mobile relay node receives a switching command message or an F1 configuration update message sent by the first access network device, the mobile relay node can send a first request message to the first access network device, and the first request message carries third indication information, thereby informing the first access network device that the mobile relay node has mobility.
  • the first device is the second access network device
  • the method further includes: The point sends a second request message to the second access network device, and the second request message is used to establish a link between the mobile relay node and the second access network; the mobile relay node receives the second indication information or the sixth indication information sent by the first device, including: the mobile relay node receives the second response message sent by the second access network device, and the second response message includes the sixth indication information.
  • the mobile relay node when the first device is a second access network device, can receive a second response message sent by the second access network device and carry sixth indication information in the message, so that the mobile relay node changes the broadcast TAC according to the sixth indication information.
  • the first device is a second AMF
  • the mobile relay node before the mobile relay node receives the second indication information or the sixth indication information sent by the first device, the method further includes:
  • the mobile relay node sends a registration request message to the second AMF; the mobile relay node receives the second indication information or the sixth indication information sent by the first device, including: the mobile relay node receives a registration acceptance message sent by the second AMF, and the registration acceptance message includes the sixth indication information.
  • the mobile relay node when the first device is the second AMF, the mobile relay node can receive a registration acceptance message sent by the second AMF, and carry sixth indication information in the message, so that the mobile relay node changes the broadcast TAC according to the sixth indication information.
  • a communication device which is applied to a communication system including a mobile relay node and at least two access network devices, and the device includes: a transceiver unit, used to receive first indication information sent by a first AMF during the process of the mobile relay node moving from a first access network device to a second access network device, wherein the first indication information is used to indicate that the AMF serving the mobile relay node has been redirected; the transceiver unit is also used to send second indication information to the mobile relay node according to the first indication information, and the second indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • the transceiver unit is specifically used to receive a switching command message sent by a first AMF, and the switching command message includes the first indication information.
  • the transceiver unit is further used to receive a first request message sent by the mobile relay node, and the first request message includes: third indication information, and the third indication information is used to indicate that the mobile relay node has mobility.
  • the transceiver unit is specifically used to send second indication information to the mobile relay node based on the first indication information and the third indication information.
  • a communication device which is applied to a communication system including a mobile relay node and at least two access network devices, the device including: a transceiver unit, used to receive fourth indication information and fifth indication information sent by a second AMF during a process in which the mobile relay node moves from a first access network device to a second access network device, the fourth indication information being used to indicate that the mobile relay node has mobility, and the fifth indication information being used to indicate that the AMF serving the mobile relay node has been redirected; the transceiver unit is also used to send sixth indication information to the mobile relay node based on the fourth indication information and the fifth indication information, the sixth indication information being used to instruct the mobile relay node to change the broadcast TAC.
  • the device also includes a processing unit, the processing unit being used to locally save seventh indication information based on the fourth indication information and the fifth indication information, the seventh indication information being used to indicate that the mobile relay node needs to change the TAC; the transceiver unit is also used to receive a second request message sent by the mobile relay node, the second request being used to establish a link between the second access network device and the mobile relay node; the transceiver unit is specifically used to send a second response message to the mobile relay node based on the second request message and the seventh indication information, the second response message including the sixth indication information.
  • a communication device which is applied to a communication system including a mobile relay node and at least two access network devices, and the device includes: a transceiver unit, used to receive the context of the mobile relay node sent by the first AMF, and the context of the mobile relay node is used to indicate that the mobile relay node has mobility; the transceiver unit is also used to send sixth indication information to the mobile relay node according to the context of the mobile relay node, and the sixth indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • the transceiver unit is further used to receive a registration request message sent by the mobile relay; the transceiver unit is further used to send a registration acceptance message to the mobile relay node based on the context of the mobile relay node and the registration request message, and the registration acceptance message includes the sixth indication information.
  • the device further includes a processing unit; the processing unit is configured to The seventh indication information is locally saved according to the context of the mobile relay node, and the seventh indication information is used to indicate that the mobile relay node needs to change the TAC; the transceiver unit is specifically used to send the registration acceptance message to the mobile relay node according to the registration request message and the seventh indication information.
  • a communication device which is applied to a communication system including a mobile relay node and at least two access network devices, and the device includes: a transceiver unit, used to broadcast a first TAC; the mobile relay node moves from the first access network device to the second access network device; the transceiver unit is also used to receive a second indication information or a sixth indication information sent by the first device, the second indication information or the sixth indication information is used to indicate the changed TAC of the mobile relay node; the transceiver unit is also used to broadcast a second TAC according to the second indication information or the sixth indication information.
  • the first device is any one of a first access network device, a second access network device, or a second AMF.
  • the first device is the first access network device
  • the transceiver unit is specifically used to receive a switching command message or an F1 configuration update message sent by the first access network device, and the switching command message or the F1 configuration update message includes the second indication information.
  • the transceiver unit is further used to send a first request message to the first access network device, and the first request message includes: third indication information, and the third indication information is used to indicate that the mobile relay node has mobility.
  • the first device is the second access network device
  • the transceiver unit is further used to send a second request message to the second access network device, and the second request message is used to establish a link between the mobile relay node and the second access network
  • the transceiver unit is specifically used to receive a second response message sent by the second access network device, and the second response message includes the sixth indication information.
  • the first device is a second AMF
  • the transceiver unit is also used to send a registration request message to the second AMF
  • the transceiver unit is specifically used to receive a registration acceptance message sent by the second AMF, and the registration acceptance message includes the sixth indication information.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node, or a mobile base station relay MBSR node, and the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT
  • a device comprising: at least one processor and a memory, wherein the at least one processor is coupled to the memory and is used to read and execute instructions in the memory, and the device is used to execute a method of any one of the implementation methods of the first to third aspects above.
  • a computer-readable medium stores a program code, and when the computer program code runs on a computer, the computer executes a method of any one of the implementation modes of the first to third aspects above.
  • a communication system comprising: a communication device in any one of the implementations of the fourth aspect, a communication device in any one of the implementations of the fifth aspect, and a communication device in any one of the implementations of the seventh aspect.
  • FIG1 shows a schematic diagram of a network architecture applicable to an embodiment of the present application
  • FIG2 shows another schematic diagram of a network architecture applicable to an embodiment of the present application
  • FIG3 shows another schematic diagram of a network architecture applicable to an embodiment of the present application
  • FIG4 shows a schematic diagram of an overall IAB architecture and interfaces
  • FIG5 shows a schematic flow chart of IAB-MT network access
  • FIG6 shows an application scenario of a mobile base station relay
  • FIG7 shows an application scenario diagram of a new IAB node triggering a TAC change
  • FIG8 is an application scenario to which the communication method provided in an embodiment of the present application is applicable.
  • FIG9 is a flow chart of a communication method provided in an embodiment of the present application.
  • FIG10 is a flow chart of another communication method provided in an embodiment of the present application.
  • FIG11 is a flow chart of another communication method provided in an embodiment of the present application.
  • FIG12 is a flow chart of another communication method provided in an embodiment of the present application.
  • FIG13 is a flow chart of another communication method provided in an embodiment of the present application.
  • FIG14 is a flow chart of another communication method provided in an embodiment of the present application.
  • FIG15 is a schematic block diagram of a communication device provided in an embodiment of the present application.
  • FIG16 is a schematic block diagram of another communication device provided in an embodiment of the present application.
  • FIG17 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: 5G system or new wireless NR, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • the technical solutions provided in the present application can also be applied to future communication systems, such as the sixth generation mobile communication system.
  • the technical solutions of the embodiments of the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication system or other communication systems.
  • D2D device to device
  • V2X vehicle-to-everything
  • M2M machine to machine
  • MTC machine type communication
  • IoT Internet of Things
  • FIG1 shows a schematic diagram of a network architecture applicable to an embodiment of the present application.
  • the network architecture may include, for example, but is not limited to, the following: UE, access network (AN), core network (core), data network (Data Network), etc.
  • UE access network
  • core core
  • Data Network data network
  • the control plane is responsible for the management of the mobile network
  • the user plane is responsible for the transmission of service data.
  • the N2 reference point is located between the AN control plane and the Core control plane
  • the N3 reference point is located between the AN user plane and the Core user plane
  • the N6 reference point is located between the Core user plane and the data network.
  • NextGen UE It is the entrance for mobile users to interact with the network. It can provide basic computing and storage capabilities, display service windows to users, and accept user operation input. NextGen UE will use new air interface technology to establish signal and data connections with AN, thereby transmitting control signals and service data to the mobile network.
  • AN Similar to the base station in the traditional network, it is deployed near the UE to provide network access for authorized users in a specific area, and can determine transmission tunnels of different qualities to transmit user data according to the user level and business requirements. AN can manage its own resources, use them reasonably, provide access services to UE on demand, and is responsible for forwarding control signals and user data between UE and the core network.
  • Core responsible for maintaining the subscription data of the mobile network, managing the network elements of the mobile network, and providing session management, mobility management, policy management, security authentication and other functions for UE.
  • the UE When the UE is attached, it provides network access authentication for the UE; when the UE has a service request, it allocates network resources for the UE; when the UE moves, it updates network resources for the UE; when the UE is idle, it provides a fast recovery mechanism for the UE; when the UE detaches, it releases network resources for the UE; when the UE has service data, it provides data routing functions for the UE, such as forwarding uplink data to the Data Network; or receiving UE downlink data from the Data Network, forwarding it to the AN, and then sending it to the UE.
  • data routing functions for the UE such as forwarding uplink data to the Data Network; or receiving UE downlink data from the Data Network, forwarding it to the AN, and then sending it to the UE.
  • the Data Network It is a data network that provides business services to users.
  • the client is located in the UE and the server is located in the data network.
  • the data network can be a private network, such as a local area network, or an external network that is not controlled by the operator, such as the Internet, or a proprietary network jointly deployed by operators, such as a network that provides IMS services.
  • FIG2 shows another schematic diagram of a network architecture applicable to an embodiment of the present application.
  • Figure 2 is a further refinement of the core network of the 5G network architecture based on Figure 1.
  • the network architecture may include but is not limited to the following: UE; user plane function (UPF); authentication server function (AUSF), core network access and mobility management function AMF, session management function (SMF), network slice selection function (NSSF), network exposure function (NEF), network function repository function (NF repository function, NRF), unified data management (UDM), policy control function (PCF), application function (AF).
  • User equipment UE can be called access terminal, user unit, user station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, User agent or user device.
  • a user device may be a device that provides voice/data connectivity to a user, such as a handheld device with wireless connection function, a vehicle-mounted device, etc.
  • terminals may be: mobile phones, tablet computers, computers with wireless transceiver functions (such as laptops, PDAs, etc.), mobile Internet devices (MID), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, user equipment in 5G networks or future evolved public land mobile communication networks (public land mobile network, PLMN) and the like.
  • MID mobile Internet devices
  • VR virtual reality
  • AR augmented reality
  • wireless terminals in industrial control wireless terminals in self-driving
  • wireless terminals in remote medical wireless terminals in smart grids
  • the user device can also be a user device in the Internet of Things (IoT) system.
  • IoT Internet of Things
  • Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection.
  • IoT technology can achieve massive connections, deep coverage, and terminal power saving through narrowband (NB) technology, for example.
  • NB narrowband
  • user devices can also include sensors such as smart printers, train detectors, and gas stations. Their main functions include collecting data (part of user devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.
  • sensors such as smart printers, train detectors, and gas stations.
  • Their main functions include collecting data (part of user devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.
  • the user equipment may be any device that can access the network.
  • the user equipment and the access network device may communicate with each other using a certain air interface technology.
  • the UE can be used to act as a base station.
  • the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc.
  • a cell phone and a car communicate with each other using sidelink signals.
  • a cell phone and a smart home device communicate with each other without relaying the communication signal through a base station.
  • Access network The access network can provide network access functions for authorized users in a specific area, including radio access network (RAN) equipment and AN equipment.
  • RAN equipment is mainly the wireless network equipment of the 3rd Generation Partnership Project (3GPP) network, and AN equipment can be access network equipment defined by non-3GPP.
  • 3GPP 3rd Generation Partnership Project
  • the access network may be an access network using different access technologies.
  • 3GPP access technology e.g., wireless access technology used in 3G, 4G or 5G systems
  • non-3GPP access technology 3GPP access technology refers to access technology that complies with 3GPP standards and specifications.
  • the access network equipment in the 5G system is called the next generation Node Base station (gNB) or RAN.
  • Non-3GPP access technology refers to access technology that does not comply with 3GPP standards and specifications.
  • air interface technology represented by access point (AP) in wireless fidelity (WiFi), worldwide interoperability for microwave access (WiMAX), code division multiple access (CDMA) network, etc.
  • AP access point
  • WiFi wireless fidelity
  • WiMAX worldwide interoperability for microwave access
  • CDMA code division multiple access
  • AN equipment can allow terminal equipment and 3GPP core network to interconnect and communicate using non-3GPP technologies.
  • the access network that implements access network functions based on wireless communication technology can be called RAN.
  • the wireless access network can be responsible for wireless resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side.
  • QoS quality of service
  • the wireless access network provides access services for terminal devices, and then completes the forwarding of control signals and user data between the terminal and the core network.
  • the access network can provide services for the cell.
  • the terminal device can communicate with the cell through the transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the access network equipment.
  • the wireless access network may include, for example, but is not limited to: a macro base station, a micro base station (also called a small station), a radio network controller (RNC), a node B (Node B, NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), an AP in a WiFi system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc.
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • HNB home base station
  • BBU baseband unit
  • an AP in a WiFi system a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc.
  • BBU baseband unit
  • DU distributed unit
  • a base station in a next-generation communication 6G system etc.
  • the embodiments of the present application provide specific technologies and features used by the wireless access network equipment. There is no limitation on the physical device form.
  • the access devices may include a centralized unit (CU) and a distributed unit (DU), etc.
  • the CU may also be divided into a CU-control plane (CP) and a CU-user plane (UP), etc.
  • the access device may also be an open radio access network (ORAN) architecture, etc. This application does not limit the specific deployment method of the access device.
  • AMF Mainly used for mobility management and access management, such as user location update, user registration network, user switching, etc.
  • AMF can also be used to implement other functions in the mobility management entity (MME) besides session management. For example, legal monitoring, or access authorization (or authentication) and other functions.
  • MME mobility management entity
  • SMF Mainly used for session management, UE Internet Protocol (IP) address allocation and management, selection of manageable user plane functions, policy control, or charging function interface endpoints, and downlink data notification.
  • IP Internet Protocol
  • the SMF is mainly responsible for session management in the mobile network, such as session establishment, modification, and release. Specific functions may include, for example, allocating IP addresses to terminal devices, selecting UPFs that provide message forwarding functions, etc.
  • UPF responsible for forwarding and receiving user data in terminal devices.
  • UPF network elements can receive user data from the data network (DN) and transmit it to terminal devices through access network devices.
  • UPF network elements can also receive user data from terminal devices through access network devices and forward it to the data network.
  • the transmission resources and scheduling functions in the UPF network element that provide services to terminal devices are managed and controlled by the SMF network element.
  • Data network A service network used to provide data services to users, such as the Internet, third-party service networks, and IP multimedia service (IMS) networks.
  • IMS IP multimedia service
  • PCF A unified policy framework used to guide network behavior, providing policy rule information for control plane functional network elements (such as AMF, SMF network elements, etc.), and is responsible for obtaining user contract information related to policy decisions.
  • control plane functional network elements such as AMF, SMF network elements, etc.
  • AF Mainly supports interaction with the 3GPP core network to provide services, such as influencing data routing decisions, interacting with the policy control function (PCF), or providing third parties to the network side.
  • PCF policy control function
  • UDM used to generate authentication credentials, user identity processing (such as storing and managing user permanent identities, etc.), access authorization control and contract data management, etc.
  • NRF Provides storage and selection functions for network function entity information for other network elements.
  • AUSF performs security authentication of UE.
  • NEF Open network functions to third parties via northbound application programming interface (API).
  • API application programming interface
  • NSSF Selects network slice for UE.
  • each network element can communicate with each other through the interfaces shown in the figure, and some interfaces can be implemented in the form of service-oriented interfaces.
  • the UE and AMF can interact through the N1 interface, and the interaction message can be called N1 message (N1 Message).
  • the RAN and AMF can interact through the N2 interface, and the N2 interface can be used for sending non-access stratum (NAS) messages, etc.
  • the RAN and UPF can interact through the N3 interface, and the N3 interface can be used to transmit user plane data, etc.
  • the SMF and UPF can interact through the N4 interface, and the N4 interface can be used to transmit information such as tunnel identification information of the N3 connection, data cache indication information, and downlink data notification messages.
  • information such as tunnel identification information of the N3 connection, data cache indication information, and downlink data notification messages.
  • the relationship between other interfaces and each network element is shown in FIG2 , and for the sake of brevity, they are not described in detail here.
  • AMF, SMF, UPF, PCF, UDM, etc. shown in Figure 2 can be understood as network elements for implementing different functions. These network elements can be independent devices, or they can be integrated into the same device to implement different functions, or they can be network elements in hardware devices, or they can be software functions running on dedicated hardware, or they can be virtualized functions instantiated on a platform (e.g., a cloud platform). This application does not limit the specific form of the above network elements.
  • the interface name between the network elements in Figure 2 is only an example, and the name of the interface in the specific implementation may be other names, which are not specifically limited in this application.
  • the name of the message (or signaling) transmitted between the above network elements is only an example and does not constitute any limitation on the function of the message itself.
  • FIG3 further refines the core network of the 5G network architecture based on FIG1.
  • the introduction to the functions of each network element in FIG3 can refer to the introduction to the corresponding network element functions in FIG2.
  • the main difference between FIG3 and FIG2 is that the interface between each network element in FIG3 is a point-to-point interface rather than a service-oriented interface.
  • the so-called IAB base station is a base station that integrates a wireless access link and a wireless backhaul link, where the access link is the communication link between the user equipment UE and the IAB base station, and the wireless backhaul link is the communication link between the IAB base stations, which is mainly used for data backhaul, and the IAB base station does not require a wired transmission network for data backhaul. Therefore, the IAB base station reduces the deployment requirements for the wired transmission network and can be deployed in scenarios such as outdoor and indoor where it is not easy to deploy a wired transmission network.
  • the overall architecture and network access process of the IAB base station are described in detail below in conjunction with FIG. 4 and FIG. 5 .
  • FIG. 4 shows a schematic diagram of an overall architecture and interfaces of an IAB.
  • the IAB architecture shown in Figure 4 needs to include CU, DU and MT.
  • CU mainly handles non-real-time wireless high-level protocol stack functions (for example, radio resource control (RRC)/packet data convergence protocol packet data convergence protocol, PDCP).
  • DU mainly handles physical layer functions and layer 2 functions with high real-time requirements (for example, port physical layer (PHY)/media access control (MAC)/radio link control (RLC)).
  • MT is a functional entity of the IAB node, which is used as the Uu port termination point of the backhaul link between the IAB node and the IAB host node or other IAB nodes.
  • FIG5 shows a schematic flow chart of IAB-MT network access.
  • Method 500 may include the following steps.
  • IAB-MT sends a registration request message to RAN.
  • the IAB node connects to the network through its MT function and performs cell selection. After selecting a suitable cell to complete the RRC connection, the IAB node can inform the network side that it is an IAB node through the RRC establishment completion message, and send a registration request message to the RAN through the MT function.
  • the initial access process of the IAB is the same as the conventional UE access process.
  • RAN sends N2 message to the 5G Core Network (5G Core Network, 5GC).
  • 5G Core Network 5G Core Network
  • the RAN serving the IAB-MT may send a registration request message to the core network via an N2 message.
  • the N2 message may be used to indicate that the node in the core network to be registered is an IAB node, and the core network can authenticate the identity of the IAB node.
  • IAB-MT successfully registers with the core network.
  • the IAB-MT can be successfully registered in the core network.
  • IAB-MT initiates session establishment.
  • the core network allocates an IP address to the IAB-MT, and the IAB-MT uses the IP address to interact with operations, administration and maintenance (OAM) functions.
  • OAM operations, administration and maintenance
  • OAM configures cell information for the IAB node.
  • OAM can configure the IAB node with cell information, such as cell identity, TAC and other information.
  • the IAB-DU sends an F1 establishment request message to the IAB host-CU.
  • the IAB host-CU can activate the cell of the IAB-DU.
  • the IAB host-CU updates the configuration.
  • the IAB host-CU may send configuration information to the core network through a configuration update process.
  • method 500 may skip step S507 and directly proceed to step S508.
  • the IAB host-CU may send an F1 establishment response message to the IAB-DU.
  • the message carries the activated cell information, which may include a cell identifier.
  • Method 500 introduces the traditional IAB-MT network access, F1 establishment and cell activation process.
  • the traditional IAB base station is a fixed relay node on the ground. In some mobile scenarios, the functions provided by the traditional IAB base station cannot meet the specific needs of users.
  • MSBR mobile base station relay
  • MSBR can It can be understood as a mobile IAB node, which can more conveniently provide services to UEs in or near the car.
  • the IAB architecture is also applicable to MSBRs in a mobile state. That is, MSBR includes IAB-MT and IAB-DU. Similar to the existing IAB architecture, MSBR can access a base station serving it through a wireless interface in a terminal-like manner.
  • the base station can be called a donor base station or an IAB donor node or an IAB donor base station.
  • the wireless interface link between the relay device and the donor base station is called a backhaul link.
  • MSBR can also access the network through its MT function, and then the operations, administration and maintenance (OAM) equipment configures cell information for the MSBR.
  • OAM operations, administration and maintenance
  • TAC#1 a fixed TAC (for example, TAC#1) is configured for MSBR
  • TAC#1 the TAC included in the broadcast message sent by MSBR
  • the TAC broadcast by MSBR does not change, and the broadcast message sent by the MSBR is still TAC#1.
  • the TAC corresponding to the cell of the MSBR accessed by the UE is TAC#1.
  • the network side cannot determine the location of the MSBR (for example, it cannot determine whether the MSBR is located in cell 101 or cell 102), and thus cannot determine the location of the UE.
  • MBSR initially configures TAC#1 and broadcasts it.
  • MBSR will switch IAB host nodes.
  • the new IAB host node cannot continue to access UE-AMF, that is, there is no N2 connection between the new IAB host node and the AMF serving the UE.
  • the new IAB node indicates that the TAC broadcast by MBSR needs to be changed (for example, MBSR broadcasts TAC#2), thereby triggering the UE to perform a mobile new registration update, and the network side can know that the current location of the UE is TAC#2.
  • the initial IAB host node needs to store the UE-AMF ID corresponding to each UE accessing the MBSR in the MBSR context.
  • the initial IAB host node needs to send all UE-AMF IDs to the new IAB host node, that is, the MBSR target includes the UE-AMF list. In this way, part of the context of all UEs accessing the MBSR needs to be bound to the MBSR, which poses a risk of exposing the UE context.
  • the new IAB host node needs to determine whether there is an N2 interface with each UE-AMF one by one, which will have a certain impact on the internal processing of the new IAB host node. Moreover, whether the MBSR needs to change the TAC is strongly bound to the service area of the UE-AMF. In extreme cases, if no UE accesses the MBSR, the TAC broadcast by the MBSR will remain unchanged. Therefore, the above method needs to be further optimized.
  • the embodiment of the present application provides a communication method, which can avoid binding part of the context of a UE accessing the MBSR with the MBSR during the MBSR switching process, and can more simply and effectively determine whether the IAB node needs to update the broadcast TAC.
  • the MBSR in the embodiments of the present application may also be referred to as a vehicle mounted relay (VMR), a mobile IAB node or a mobile relay node.
  • VMR vehicle mounted relay
  • FIG8 is an application scenario to which the communication method provided in an embodiment of the present application is applicable.
  • IAB-AMF refers to the AMF serving the MT, that is, when the MT is switched, if the AMF is not redirected, the TAC broadcast by the mobile IAB does not change.
  • TAU tracking area update
  • the IAB-MT in the embodiment of the present application may also be referred to as MBSR-MT, or mobile IAB-MT
  • the IAB-DU in the embodiment of the present application may also be referred to as MBSR-DU, or mobile IAB-DU.
  • Figure 9 is a process diagram of a communication method provided in an embodiment of the present application.
  • Method 900 can be applied to a communication system including a mobile relay node and at least two access network devices.
  • Method 900 can be applied to a process in which a mobile relay node moves from a first access network device to a second access network device.
  • Method 900 may include the following steps.
  • a mobile relay node sends a first request message to a first access network device.
  • the first request message may carry third indication information, and the third indication information is used to indicate that the mobile relay node has mobility.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node (ie, an IAB node with mobility), or a mobile base station relay MBSR node.
  • the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT.
  • the first request message includes: an ID of a distributed unit in the mobile relay node and/or a first TAC.
  • the method for the mobile relay node to obtain the first TAC is not limited in this application.
  • the first TAC may be acquired by the mobile relay node from OAM.
  • the first TAC may also be pre-configured on the mobile relay node.
  • the first request message may be an F1 establishment request message.
  • the F1 establishment request message is used to establish an F1 link between the mobile relay node and the first access network device.
  • step S901 can be understood as: the DU function of the mobile relay node sends an F1 establishment request message to the CU function of the first access network device.
  • method 900 also includes the MT function of the mobile relay node initiating a registration process through the first access network device and registering with the first AMF.
  • the first AMF serves the MT function of the mobile relay node.
  • the first AMF is hereinafter referred to as serving the mobile relay node. It should be noted that during the registration process, the first AMF learns that the mobile relay node has mobility, and the indication information used to indicate that the mobile relay node has mobility can be stored in the context of the mobile relay node.
  • the mobile relay node broadcasts a first TAC to the UE.
  • the mobile relay node may broadcast the first TAC to the UE.
  • the first access network device receives the first indication information sent by the first AMF.
  • the first indication message is used to indicate that the AMF serving the mobile relay node has been redirected.
  • the first indication information may also be carried by a switching command message, that is, the first access network device receives a switching command message sent by the first AMF, and the switching command message includes the first indication information.
  • the access network device may also be referred to as an IAB host node or an IAB host base station in this application.
  • the first AMF can select a second AMF according to the second access network device identifier, that is, AMF redirection occurs.
  • the first AMF is the AMF that serves the mobile relay node before the AMF redirection occurs.
  • the second AMF is the AMF that serves the mobile relay node after the AMF redirection occurs.
  • the first access network device sends second indication information to the mobile relay node according to the first indication information.
  • the second indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • the first access network device may send a handover command message or an F1 configuration update message to the mobile relay node, where the handover command message or the F1 configuration update message includes the second indication information.
  • the first access network device sends second indication information to the mobile relay node according to the first indication information and the third indication information.
  • S905 The mobile relay node broadcasts the second TAC to the UE.
  • the method for the mobile relay node to obtain the second TAC is not limited in this application.
  • the second TAC may be obtained by the mobile relay node from the OAM.
  • the mobile relay node may request the OAM to allocate a new TAC.
  • the second TAC may also be pre-configured on the mobile relay node.
  • both the first TAC and the second TAC are pre-configured on the mobile relay node.
  • the mobile relay node may first deactivate the first TAC, then activate the second TAC (ie, start the second TAC), and then broadcast the second TAC to the UE.
  • the mobile relay node broadcasting the second TAC to the UE can be understood as: the mobile relay node no longer broadcasts the first TAC, but broadcasts the second TAC.
  • the first access network device can send a second indication message to the mobile relay node to instruct the mobile relay node to change the broadcast TAC after learning through the first indication message that AMF redirection has occurred.
  • the mobile relay node can more simply and effectively determine whether the broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • Figure 10 is a process diagram of another communication method provided in an embodiment of the present application.
  • Method 1000 can be applied to a communication system including a mobile relay node and at least two access network devices.
  • Method 1000 can be applied to a process in which a mobile relay node moves from a first access network device to a second access network device.
  • Method 1000 may include the following steps.
  • a mobile relay node broadcasts a first TAC to a UE.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node (ie, an IAB node with mobility).
  • Node or a mobile base station relay MBSR node
  • the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT.
  • the first TAC may be obtained by the mobile relay node from the OAM, or may be pre-configured on the mobile relay node, which is not limited in this application.
  • method 1000 also includes the MT function of the mobile relay node initiating a registration process through the first access network device and registering with the first AMF.
  • the first AMF serves the MT function of the mobile relay node.
  • the first AMF is hereinafter referred to as serving the mobile relay node. It should be noted that during the registration process, the first AMF learns that the mobile relay node has mobility, and can store the indication information used to indicate that the mobile relay node has mobility in the context of the mobile relay node.
  • the second access network device receives the fourth indication information and the fifth indication information sent by the second AMF.
  • the fourth indication information is used to indicate that the mobile relay node has mobility
  • the fifth indication information is used to indicate that the AMF serving the mobile relay node has been redirected.
  • the access network device may also be referred to as a host base station, an IAB host node or an IAB host base station in this application.
  • the first AMF can select a second AMF according to the second access network device identifier, that is, AMF redirection occurs.
  • the first AMF is the AMF that serves the mobile relay node before the AMF redirection occurs.
  • the second AMF is the AMF that serves the mobile relay node after the AMF redirection occurs.
  • the first AMF sends indication information stored in the context of the mobile relay node to the second AMF for indicating that the mobile relay node has mobility.
  • the second AMF determines the fourth indication information based on the context of the mobile relay node.
  • the second access network device locally stores the seventh indication information.
  • the seventh indication information is used to indicate that the mobile relay node needs to change the TAC.
  • the seventh indication information may be generated and stored locally by the second access network device itself after receiving the fourth indication information and the fifth indication information.
  • the seventh indication information may be flag information or a flag bit.
  • the second access network device receives a second request message sent by the mobile relay node.
  • the second request message is used to establish a link between the second access network device and the mobile relay node.
  • the second request message may be an F1 establishment request message.
  • the DU function of the mobile relay node sends the F1 establishment request message to the CU function of the second access network device.
  • the mobile relay node receives sixth indication information sent by the second access network device.
  • the second access network device may send sixth indication information to the mobile relay node according to the second request message and the seventh indication information, where the sixth indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • the sixth indication information may be carried in the second response message, that is, the mobile relay node receives a second response message sent by the second access network device, and the second response message includes the sixth indication information.
  • the second response message may be an F1 establishment response message.
  • the CU function of the second access network device sends an F1 establishment response message to the DU function of the mobile relay node.
  • S1006 The mobile relay node broadcasts the second TAC to the UE.
  • the method for the mobile relay node to obtain the second TAC is not limited in this application.
  • the second TAC may be obtained by the mobile relay node from the OAM.
  • the mobile relay node may request the OAM to allocate a new TAC.
  • the second TAC may also be pre-configured on the mobile relay node.
  • both the first TAC and the second TAC are pre-configured on the mobile relay node.
  • the mobile relay node may first deactivate the first TAC, then activate the second TAC (ie, start the second TAC), and then broadcast the second TAC to the UE.
  • the mobile relay node broadcasting the second TAC to the UE can be understood as: the mobile relay node no longer broadcasts the first TAC, but broadcasts the second TAC.
  • the mobile relay node before the mobile relay node broadcasts the second TAC to the UE, the mobile relay node sends the acquired second TAC to the second access network device so that the second access network device can perceive which TAC parameter is broadcast by the mobile relay node. For example, the mobile relay node sends a DU configuration update message (gNB-DU Configuration Update) to the second access network device, and the message carries the second TAC.
  • a DU configuration update message gNB-DU Configuration Update
  • the second access network device during the process of the mobile relay node moving from the first access network device to the second access network device, the second access network device
  • the second access network device can send an indication message of changing the TAC to the mobile relay node.
  • the mobile relay node can more simply and effectively determine whether the broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • Figure 11 is a process diagram of another communication method provided in an embodiment of the present application.
  • Method 1100 can be applied to a communication system including a mobile relay node and at least two access network devices.
  • Method 1100 can be applied to a process in which a mobile relay node moves from a first access network device to a second access network device.
  • Method 1100 may include the following steps.
  • a mobile relay node broadcasts a first TAC to a UE.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node (ie, an IAB node with mobility), or a mobile base station relay MBSR node.
  • the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT.
  • the first TAC may be obtained by the mobile relay node from the OAM, or may be pre-configured on the mobile relay node, which is not limited in this application.
  • method 1100 also includes the MT function of the mobile relay node initiating a registration process through the first access network device and registering with the first AMF.
  • the first AMF serves the MT function of the mobile relay node.
  • the first AMF is hereinafter referred to as serving the mobile relay node. It should be noted that during the registration process, the first AMF learns that the mobile relay node has mobility, and stores the indication information used to indicate that the mobile relay node has mobility in the context of the mobile relay node.
  • the second AMF receives the context of the mobile relay node sent by the first AMF.
  • the first AMF can select the second AMF according to the second access network device identifier, that is, AMF redirection occurs.
  • the first AMF is the AMF that serves the mobile relay node before the AMF redirection occurs.
  • the second AMF is the AMF that serves the mobile relay node after the AMF redirection occurs.
  • the first AMF sends the indication information stored in the context of the mobile relay node for indicating that the mobile relay node has mobility to the second AMF.
  • the second AMF determines that the mobile relay node has mobility based on the context of the mobile relay node.
  • the context of the mobile relay node includes indication information for indicating that the mobile relay node has mobility.
  • the context of the mobile relay node can be understood as the context of the MT function of the mobile relay node.
  • the second AMF receives a registration request message sent by the mobile relay node.
  • the method also includes: the second AMF locally saves seventh indication information according to the context of the mobile relay node, and the seventh indication information is used to indicate that the mobile relay node needs to change the TAC.
  • the second AMF can send a registration acceptance message to the mobile relay node according to the seventh indication information and the registration request message, and carry indication information instructing the mobile relay node to change the broadcast TAC in the message.
  • the seventh indication information may be flag information or a flag bit.
  • the mobile relay node receives the sixth indication information sent by the second AMF.
  • the sixth indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • the sixth indication information may be carried in a registration acceptance message, that is, the mobile relay node receives a registration acceptance message sent by the second AMF, and the registration acceptance message includes the sixth indication information.
  • the second AMF sends a registration acceptance message to the mobile relay node based on the registration request message and the seventh indication information.
  • S1105 The mobile relay node broadcasts the second TAC to the UE.
  • the method for the mobile relay node to obtain the second TAC is not limited in this application.
  • the second TAC may be obtained by the mobile relay node from the OAM.
  • the mobile relay node may request the OAM to allocate a new TAC.
  • the second TAC may also be pre-configured on the mobile relay node.
  • both the first TAC and the second TAC are pre-configured on the mobile relay node.
  • the mobile relay node may first deactivate the first TAC, then activate the second TAC (ie, start the second TAC), and then broadcast the second TAC to the UE.
  • the mobile relay node broadcasting the second TAC to the UE can be understood as: the mobile relay node no longer broadcasts the first TAC, but broadcasts the second TAC.
  • the second AMF in the process of the mobile relay node moving from the first access network device to the second access network device, when the second AMF learns that the mobile relay node has mobility and AMF redirection occurs, the second AMF can send a In this way, the mobile relay node can more simply and effectively determine whether the broadcast TAC needs to be updated, and avoid the risk of exposing the UE context.
  • FIG12 is a flow chart of a communication method provided in an embodiment of the present application.
  • Method 1200 is a detailed introduction to method 900 and may include the following steps.
  • the IAB-DU function of MBSR initially configures two TACs, namely TAC#1 and TAC#2.
  • IAB-MT registers with AMF
  • AMF provides an IAB authorization indication to host gNB#1.
  • the IAB-MT of MBST initiates a registration process and registers in the core network. During this process, the IAB-MT sends a mobile IAB indication message to the host gNB#1. When the host gNB#1 sends an N2 message to AMF#1, the mobile IAB indication message is sent to AMF#1. AMF#1 triggers the authentication and authorization process for the IAB-MT according to the mobile IAB indication message. If the authentication process is successful, AMF#1 sends an authentication success indication message to the host gNB#1.
  • the host gNB#1 can be the IAB host node mentioned above, and the host gNB#1 is a type of access network device.
  • IAB-DU sends an F1 establishment request message to the host gNB#1.
  • the IAB-DU function of MBSR initiates the F1 establishment process, and the IAB-DU sends an F1 establishment request message to gNB#1 to activate the MBSR cell.
  • the F1 establishment request message may include: one or more of: IAB-DU ID, TAC#1 supported by the DU, and mobile IAB indication information.
  • the F1 establishment request message may be the first request message in method 900.
  • the mobile IAB indication information is used to indicate that the IAB node has mobility.
  • the mobile IAB indication information may be the third indication information in method 900.
  • the mobile IAB indication information in the embodiment of the present application may also be referred to as MBSR indication information.
  • the host IAB stores the binding relationship between the IAB-MT and the IAB-DU.
  • the IAB-DU sends a broadcast message to the UE, broadcasting TAC#1.
  • the UE normally registers with the core network through the MBSR/Mobile IAB cell.
  • the core network allocates a registration area to the UE.
  • the registration area includes the tracking area identity (TAI) corresponding to the current UE access, that is, the TAI includes TAC#1.
  • TAI tracking area identity
  • S1208 MBSR/mobile IAB moves from host gNB#1 to host gNB#2, and IAB-MT requests to initiate a handover.
  • the host gNB#1 initiates the N2 switching process, in which AMF#1 selects AMF#2 according to the identifier of the host gNB#2, triggering AMF redirection.
  • AMF#1 sends a handover instruction to the donor gNB#1, and the instruction carries an AMF redirection indication.
  • the handover instruction may be the handover command message or the first indication information in method 900.
  • host gNB#1 can trigger IAB-DU to change the TAC in the broadcast in two ways. One way is to perform steps S1212, S1213, and S1215 in sequence. The other way is to perform S1214 and S1215 in sequence.
  • S1212 Host gNB#1 sends a switching command to IAB-MT, which carries an AMF redirection indication.
  • the IAB-MT sends TAC change indication information to the IAB-DU.
  • the TAC change indication information may be the second indication information in method 900 .
  • host gNB#1 sends a configuration update message to IAB-DU.
  • the host gNB#1 directly interacts with the IAB-DU through the F1 interface and sends an F1 configuration update message, in which the TAC change indication information is carried.
  • the TAC change indication information may be the second indication information in method 900.
  • the IAB-DU activates TAC#2 according to the TAC change indication information.
  • IAB-DU sends an F1 establishment request message to the host gNB#2 to activate the MBSR cell.
  • the F1 establishment request message may include: one or more of: IAB-DU ID, TAC#2 supporting the DU, and mobile IAB indication information.
  • host gNB#2 sends an F1 establishment response message to IAB-DU.
  • IAB-DU sends a broadcast message to the UE, broadcasting TAC#2.
  • the UE monitors the broadcast message and determines that the current TAI (including TAC#2) does not belong to the registration area allocated by the network side. Initiate the mobile registration update process.
  • S1220 UE performs mobile registration update.
  • the host gNB#1 can store the binding relationship between the IAB-DU and the IAB-CU, and based on the binding relationship, after learning that the AMF has been redirected, it can send TAC change indication information to the IAB-DU, thereby changing the TAC broadcast by the IAB. In this way, it is possible to more simply and effectively determine whether the IAB node needs to update the broadcast TAC.
  • the method for MBSR to obtain TAC is not limited in the present application.
  • Figure 12 is an example of a method in which both TAC#1 and TAC#2 are pre-configured on the mobile relay node.
  • TAC#1 and TAC#2 can also be obtained by the mobile relay node from OAM.
  • the IAB-DU function initially obtains TAC#1 and TAC#2 from OAM.
  • the IAB-DU function first obtains TAC#1 from OAM.
  • the IAB-DU function obtains TAC#2 from OAM.
  • FIG13 is a flow chart of another communication method provided in an embodiment of the present application.
  • Method 1300 is a detailed introduction to method 1000. Method 1300 may include the following steps.
  • the IAB-DU function of MBSR initially configures two TACs, namely TAC#1 and TAC#2.
  • IAB-MT registers with AMF, and AMF provides an IAB authorization indication to the host gNB#1.
  • the IAB-MT of MBST initiates a registration process and registers in the core network. During this process, the IAB-MT sends a mobile IAB indication message to the host gNB#1. When the host gNB#1 sends an N2 message to AMF#1, the mobile IAB indication message is sent to AMF#1. AMF#1 triggers the authentication and authorization process for the IAB-MT according to the mobile IAB indication message. If the authentication process is successful, AMF#1 sends an authentication success indication message to the host gNB#1.
  • IAB-DU sends an F1 establishment request message to the host gNB#1.
  • the IAB-DU function of MBSR initiates the F1 establishment process, and the IAB-DU sends an F1 establishment request message to gNB#1 to activate the MBSR cell.
  • the F1 establishment request message may include: one or more of: IAB-DU ID, TAC#1 supported by the DU, and IAB mobility indication information.
  • the IAB mobility indication information is used to indicate that the IAB node has mobility.
  • the mobile IAB indication information in the embodiment of the present application may also be referred to as MBSR indication information.
  • IAB-DU sends a broadcast message to the UE, broadcasting TAC#1.
  • the UE normally registers with the core network through the MBSR/Mobile IAB cell.
  • the core network allocates a registration area to the UE.
  • the registration area includes the TAI corresponding to the current UE access, that is, the TAI includes TAC#1.
  • host gNB#1 sends a handover request message to AMF#1, the handover request message includes the identification information of host gNB#2, and AMF#1 can select AMF#2 according to the identification information of host gNB#2 to trigger AMF redirection.
  • AMF#1 can pass the context of IAB-MT to AMF#2, and the context of IAB-MT can include mobile IAB indication information.
  • the mobile IAB indication information is used to indicate that the IAB node has mobility.
  • AMF#2 sends a handover request message to the host gNB#2, which carries the AMF redirection indication and mobile IAB indication information.
  • the mobile IAB indication information may be the fourth indication information in method 1000
  • the AMF redirection indication may be the fifth indication information in method 1000.
  • the flag bit can be the seventh indication information in method 1000.
  • AMF#1 sends a switching command to gNB#1.
  • the F1 establishment request message may include: one or more of: IAB-DU ID, TAC#1 supported by the DU, and mobile IAB indication information.
  • the F1 establishment request message may be the second request message in method 1000 .
  • S1315 Host gNB#2 determines that the IAB-DU needs to change the TAC based on the locally set flag.
  • Host gNB#2 sends an F1 setup response message to IAB-DU, where the F1 setup response message includes a TAC change indication.
  • the TAC change indication may be the sixth indication information in method 1000 .
  • IAB-DU learns that the broadcast TAC needs to be changed, so it activates TAC#2 and reports TAC#2 to the host gNB#2 for configuration update.
  • IAB-DU sends a broadcast message to the UE, broadcasting TAC#2.
  • the UE monitors the broadcast message, and determines that the current TAI (including TAC#2) does not belong to the registration area allocated by the network side, and initiates the mobile registration update process.
  • S1320 UE performs mobile registration update.
  • the host gNB#2 after learning that the AMF has been redirected and the IAB has mobility, the host gNB#2 can set a flag bit locally. After receiving the establishment request message sent by the IAB-DU, the host gNB#2 can determine that the IAB-DU needs to change the broadcast TAC according to the flag bit, and send an instruction to change the TAC to it. In this way, it is possible to more simply and effectively determine whether the IAB node needs to update the broadcast TAC.
  • the method for MBSR to obtain TAC is not limited in the present application.
  • Figure 13 is an example of a method in which both TAC#1 and TAC#2 are pre-configured on the mobile relay node.
  • TAC#1 and TAC#2 can also be obtained by the mobile relay node from OAM.
  • the IAB-DU function initially obtains TAC#1 and TAC#2 from OAM.
  • the IAB-DU function first obtains TAC#1 from OAM.
  • the IAB-DU function obtains TAC#2 from OAM.
  • FIG14 is a flow chart of another communication method provided in an embodiment of the present application.
  • Method 1400 is a detailed introduction to method 1100. Method 1400 may include the following steps.
  • the IAB-DU function of MBSR initially configures two TACs, namely TAC#1 and TAC#2.
  • IAB-MT registers with AMF
  • AMF provides an IAB authorization indication to host gNB#1.
  • the IAB-MT of MBST initiates a registration process and registers in the core network. During this process, the IAB-MT sends a mobile IAB indication message to the host gNB#1. When the host gNB#1 sends an N2 message to AMF#1, the mobile IAB indication message is sent to AMF#1. AMF#1 triggers the authentication and authorization process for the IAB-MT according to the mobile IAB indication message. If the authentication process is successful, AMF#1 sends an authentication success indication message to the host gNB#1.
  • the core network may know that the MBSR is a mobile IAB.
  • IAB-DU sends an F1 establishment request message to the host gNB#1.
  • the IAB-DU function of MBSR initiates the F1 establishment process, and the IAB-DU sends an F1 establishment request message to gNB#1 to activate the MBSR cell.
  • the F1 establishment request message may include: one or more of: IAB-DU ID, TAC#1 supported by the DU, and mobile IAB indication information.
  • the IAB mobile indication information is used to indicate that the IAB node has mobility.
  • the mobile IAB indication information in the embodiment of the present application may also be referred to as MBSR indication information.
  • the IAB-DU sends a broadcast message to the UE, broadcasting TAC#1.
  • S1406 UE registers with AMF via MBSR.
  • the UE normally registers with the core network through the MBSR/Mobile IAB cell.
  • the core network allocates a registration area to the UE.
  • the registration area includes the TAI corresponding to the current UE access, that is, the TAI includes TAC#1.
  • MBSR/mobile IAB moves from host gNB#1 to slave host gNB#2, and IAB-MT requests to initiate a handover.
  • the host gNB#1 sends a handover request message to AMF#1, and the handover request message includes the identification information of the host gNB#2.
  • AMF#1 can select AMF#2 according to the identification information of the host gNB#2 to trigger AMF redirection.
  • AMF#1 can pass the context of IAB-MT to AMF#2, and the context of IAB-MT can include mobile IAB indication information, that is, indicating that the MBSR has mobility.
  • AMF#2 learns that the MT is a mobile IAB and after redirection occurs in this handover, a flag can be set locally, where the flag is used to indicate that the DU associated with the MT function needs to change the broadcast TAC.
  • the flag bit can be the seventh indication information in method 1400.
  • IAB-MT initiates a mobile registration update process after the handover is completed.
  • IAB-MT sends a registration request message to AMF#2.
  • AMF#2 determines that the IAB-DU needs to change the TAC based on the locally set flag bit.
  • AMF#2 sends a registration acceptance message to IAB-MT.
  • the registration acceptance message may carry a TAC change indication
  • the TAC change indication may be the sixth indication information in method 1100.
  • the IAB-MT sends a TAC change indication to the IAB-DU.
  • the IAB-DU activates TAC#2 according to the TAC change indication.
  • IAB-DU sends an F1 establishment request message to the host gNB#2.
  • host gNB#2 sends an F1 establishment response message to IAB-DU.
  • IAB-DU sends a broadcast message to the UE, broadcasting TAC#2.
  • the UE monitors the broadcast message, and determines that the current TAI (including TAC#2) does not belong to the registration area allocated by the network side, and initiates the mobile registration update process.
  • AMF#2 after AMF#2 learns from the context of IAB-MT that IAB has mobility and AMF has been redirected, it can set a flag bit locally. After receiving the registration request message sent by IAB-MT, host AMF#2 can determine that the IAB-DU associated with IAB-MT needs to change the broadcast TAC according to the flag bit, and send an instruction to change the TAC to IAB-MT. In this way, it is possible to more simply and effectively determine whether the IAB node needs to update the broadcast TAC.
  • the method for MBSR to obtain TAC is not limited in the present application.
  • Figure 14 is an example of a method in which both TAC#1 and TAC#2 are pre-configured on the mobile relay node.
  • TAC#1 and TAC#2 can also be obtained by the mobile relay node from OAM.
  • the IAB-DU function initially obtains TAC#1 and TAC#2 from OAM.
  • the IAB-DU function first obtains TAC#1 from OAM.
  • the IAB-DU function obtains TAC#2 from OAM.
  • FIG. 15 is a schematic block diagram of an apparatus 1500 provided in an embodiment of the present application.
  • the device 1500 includes a transceiver unit 1510, a storage unit 1520, and a processing unit 1530.
  • the transceiver unit 1510 can implement corresponding communication functions, and the transceiver unit 1510 can also be called a communication interface or a communication unit.
  • the storage unit 1520 can be used to store instructions and/or data, and the processing unit 1530 is used to perform data processing.
  • the processing unit 1530 can read the instructions and/or data in the storage unit so that the device implements the aforementioned method embodiment.
  • the apparatus 1500 is used to execute the actions performed by the first access network device in the above method embodiment.
  • a possible implementation method provides a communication device 1500, which is applied to a communication system including a mobile relay node and at least two access network devices, and the device includes: a transceiver unit 1510, used to receive first indication information sent by a first AMF during the process of the mobile relay node moving from a first access network device to a second access network device, the first indication information being used to indicate that the AMF serving the mobile relay node has been redirected; the transceiver unit 1510 is also used to send second indication information to the mobile relay node based on the first indication information, the second indication information being used to instruct the mobile relay node to change the broadcast TAC.
  • the transceiver unit 1510 is specifically used to receive a switching command message sent by a first AMF, and the switching command message includes the first indication information.
  • the transceiver unit 1510 is further used to receive a first request message sent by the mobile relay node, where the first request message includes: third indication information, where the third indication information is used to indicate that the mobile relay node has mobility.
  • the transceiver unit 1510 is specifically configured to send second indication information to the mobile relay node according to the first indication information and the third indication information.
  • transceiver unit 1510 in the above embodiment can be implemented by a transceiver or a transceiver-related circuit.
  • the storage unit 1520 can be implemented by at least one memory.
  • the processing unit 1530 can be implemented by at least one processor or a processor-related circuit.
  • the device 1500 is used to execute the actions performed by the second access network device in the above method embodiment.
  • a communication device 1500 is provided, which is applied to a communication system including a mobile relay node and at least two access network devices, and the device includes: a transceiver unit 1510, used to receive fourth indication information and fifth indication information sent by a second AMF during the process of the mobile relay node moving from a first access network device to a second access network device, the fourth indication information being used to indicate that the mobile relay node has mobility, and the fifth indication information being used to indicate that the AMF serving the mobile relay node has been redirected; the transceiver unit 1510 is also used to send sixth indication information to the mobile relay node based on the fourth indication information and the fifth indication information, and the sixth indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • a transceiver unit 1510 used to receive fourth indication information and fifth indication information sent by a second AMF during the process of the mobile relay node moving from a first access network device to a second access network device, the fourth indication information being used to indicate that the mobile relay node has
  • the device also includes a processing unit 1530, and the processing unit 1530 is used to locally save seventh indication information according to the fourth indication information and the fifth indication information, and the seventh indication information is used to indicate that the mobile relay node needs to change the TAC; the transceiver unit 1510 is also used to receive a second request message sent by the mobile relay node, and the second request is used to establish a link between the second access network device and the mobile relay node; the transceiver unit 1510 is specifically used to send a second response message to the mobile relay node according to the second request message and the seventh indication information, and the second response message includes the sixth indication information.
  • transceiver unit 1510 in the above embodiment can be implemented by a transceiver or a transceiver-related circuit.
  • the storage unit 1520 can be implemented by at least one memory.
  • the processing unit 1530 can be implemented by at least one processor or a processor-related circuit.
  • the device 1500 is used to execute the actions performed by the second AMF in the above method embodiment.
  • a communication device 1500 is provided, which is applied to a communication system including a mobile relay node and at least two access network devices, and the device includes: a transceiver unit 1510, used to receive the context of the mobile relay node sent by the first AMF, and the context of the mobile relay node is used to indicate that the mobile relay node has mobility; the transceiver unit 1510 is also used to send sixth indication information to the mobile relay node according to the context of the mobile relay node, and the sixth indication information is used to instruct the mobile relay node to change the broadcast TAC.
  • the transceiver unit 1510 is also used to receive a registration request message sent by the mobile relay; the transceiver unit 1510 is also used to send a registration acceptance message to the mobile relay node based on the context of the mobile relay node and the registration request message, and the registration acceptance message includes the sixth indication information.
  • the device also includes a processing unit 1530; the processing unit 1530 is used to locally save the seventh indication information according to the context of the mobile relay node, and the seventh indication information is used to indicate that the mobile relay node needs to change the TAC; the transceiver unit 1510 is specifically used to send the registration acceptance message to the mobile relay node according to the registration request message and the seventh indication information.
  • transceiver unit 1510 in the above embodiment can be implemented by a transceiver or a transceiver-related circuit.
  • the storage unit 1520 can be implemented by at least one memory.
  • the processing unit 1530 can be implemented by at least one processor or a processor-related circuit.
  • the device 1500 is used to execute the actions performed by the mobile relay node in the above method embodiment.
  • a communication device 1500 is provided, which is applied to a communication system including a mobile relay node and at least two access network devices, and the device includes: a transceiver unit 1510, used to broadcast a first TAC; the mobile relay node moves from the first access network device to the second access network device; the transceiver unit 1510 is also used to receive a second indication information or a sixth indication information sent by the first device, the second indication information or the sixth indication information is used to indicate the changed TAC of the mobile relay node; the transceiver unit 1510 is also used to broadcast a second TAC according to the second indication information or the sixth indication information.
  • the first device is any one of a first access network device, a second access network device, or a second AMF.
  • the first device is the first access network device
  • the transceiver unit 1510 is specifically configured to receive a switching command message or an F1 configuration update message sent by the first access network device, wherein the switching command message or the F1 configuration update message The message includes the second indication information.
  • the transceiver unit 1510 is further used to send a first request message to the first access network device, where the first request message includes: third indication information, where the third indication information is used to indicate that the mobile relay node has mobility.
  • the first device is the second access network device
  • the transceiver unit 1510 is also used to send an F1 establishment request message to the second access network device, and the F1 establishment request message is used to establish a link between the mobile relay node and the second access network; the transceiver unit 1510 is specifically used to receive an F1 establishment response message sent by the second access network device, and the F1 establishment response message includes the sixth indication information.
  • the first device is a second AMF
  • the transceiver unit 1510 is also used to send a registration request message to the second AMF
  • the transceiver unit 1510 is specifically used to receive a registration acceptance message sent by the second AMF, and the registration acceptance message includes the sixth indication information.
  • the mobile relay node is a mobile wireless access link and wireless backhaul link IAB node, or a mobile base station relay MBSR node, and the mobile relay node includes: a distributed unit DU and a mobile terminal function entity MT
  • transceiver unit 1510 in the above embodiment can be implemented by a transceiver or a transceiver-related circuit.
  • the storage unit 1520 can be implemented by at least one memory.
  • the processing unit 1530 can be implemented by at least one processor or a processor-related circuit.
  • FIG. 16 is another schematic block diagram of a communication device provided according to an embodiment of the present application.
  • the embodiment of the present application further provides a device 1600.
  • the device 1600 includes a processor 1610, the processor 1610 is coupled to a memory 1620, the memory 1620 is used to store computer programs or instructions and/or data, and the processor 1610 is used to execute the computer programs or instructions and/or data stored in the memory 1620, so that the method in the above method embodiment is executed.
  • the device 1600 includes one or more processors 1610.
  • the memory 1620 included in the device 1600 may be one or more.
  • the memory 1620 may be integrated with the processor 1610 or provided separately.
  • the device 1600 may further include a transceiver 1630, and the transceiver 1630 is used for receiving and/or sending signals.
  • the processor 1610 is used to control the transceiver 1630 to receive and/or send signals.
  • the device 1600 is used to implement the operations performed by the first access network device, the second access network device, the second AMF or the mobile relay node in the above method embodiment.
  • the embodiment of the present application further provides a device 1700, which can be a network device or a chip.
  • the device 1700 can be used to execute the operations executed by the network device (such as the above-mentioned network elements) in the above-mentioned method embodiment.
  • FIG17 shows a simplified structural diagram.
  • Apparatus 1700 includes a portion 1710 and a portion 1720.
  • the portion 1710 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; the portion 1720 is mainly used for baseband processing, controlling the base station, etc.
  • the portion 1710 can generally be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc.
  • the portion 1720 is generally the control center of the base station, and can generally be referred to as a processing unit, which is used to control the base station to perform the processing operations on the receiving device side in the above method embodiment.
  • the transceiver unit of part 1710 may also be referred to as a transceiver or a transceiver, etc., and includes an antenna and a radio frequency circuit, wherein the radio frequency circuit is mainly used for radio frequency processing.
  • the device used to implement the receiving function in part 1710 may be regarded as a receiving unit
  • the device used to implement the sending function may be regarded as a sending unit, that is, part 1710 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc.
  • the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.
  • Part 1720 may include one or more single boards, each of which may include one or more processors and one or more memories.
  • the processor is used to read and execute the program in the memory to realize the baseband processing function and the control of the base station. If there are multiple single boards, each single board can be interconnected to enhance the processing capability. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processors at the same time.
  • FIG17 is merely an example and not a limitation, and the above-mentioned network device including the transceiver unit and the processing unit may not rely on the structure shown in FIG17 .
  • the chip When the device 1700 is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.
  • the device 1700 may also be a chip system or a processing system, so that the device installed with the device 1700 can implement the method and function of the embodiment of the present application.
  • the processing unit 1720 may be a processing circuit in a chip system or a processing system, which implements the processing of the device installed with the chip system or the processing system.
  • Control can also be coupled to a linked storage unit to call instructions in the storage unit so that the device can implement the methods and functions of the embodiments of the present application.
  • the transceiver unit 1710 can be an input and output circuit in a chip system or a processing system, which outputs information processed by the chip system or inputs data or signaling information to be processed into the chip system for processing.
  • An embodiment of the present application also provides a computer-readable storage medium on which computer instructions are stored for implementing the method performed by the first access network device, the second access network device, the second AMF or the mobile relay node in the above method embodiment.
  • the computer when the computer program is executed by a computer, the computer can implement the method performed by the first access network device, the second access network device, the second AMF or the mobile relay node in the above method embodiment.
  • An embodiment of the present application also provides a computer program product comprising instructions, which, when executed by a computer, enables the computer to implement the method performed by the first access network device, the second access network device, the second AMF or the mobile relay node in the above method embodiment.
  • processors mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
  • the memory mentioned in the embodiments of the present application may be a volatile memory and/or a non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.
  • the volatile memory may be a random access memory (RAM).
  • a RAM may be used as an external cache.
  • RAM may include the following forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).
  • SRAM static RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced SDRAM
  • SLDRAM synchronous link DRAM
  • DR RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.
  • memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement the solution provided by the present application.
  • each functional unit in each embodiment of the present application may be integrated into one unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof.
  • all or part of the embodiments may be implemented in the form of a computer program product.
  • the computer program product may include one or more computer programs. Instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer may be a personal computer, a server, or a network device, etc.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, a computer, a server, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD), etc.
  • the aforementioned available medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.
  • the names of the first request message, the second request message and various other messages are used.
  • these messages are merely examples of the content to be carried or the functions to be implemented, and the specific names of the messages do not limit the present application, for example, they can also be request messages, response messages, etc.
  • These messages can be specific messages, and can be certain fields in the messages. These messages can also represent various service operations.

Landscapes

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

Abstract

本申请实施例提供了一种通信方法、装置以及系统，该方法应用于包括移动中继节点和至少两个接入网设备的通信系统，该方法包括：在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，所述第一接入网设备接收第一接入和移动管理功能AMF发送的第一指示信息，所述第一指示信息用于指示服务所述移动中继节点的AMF发生了重定向；所述第一接入网设备根据所述第一指示信息，向所述移动中继节点发送第二指示信息，所述第二指示信息用于指示所述移动中继节点改变广播的跟踪区域码TAC。通过上述方法，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC。

Description

通信方法、装置以及系统
本申请要求于2022年9月28日提交中国专利局、申请号为202211191762.5、申请名称为“通信方法、装置以及系统”的中国专利申请的优先权，并将其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，并且更具体地，涉及一种通信方法、装置以及系统。
背景技术
随着第5代(5th Generation，5G)网络的正式商用，5G网络开始逐渐应用于各行各业。在5G新空口(New Radio，NR)研究中提出了集成无线接入链路和无线回传链路(integrated access and backhaul，IAB)的基站。所谓IAB基站，是该基站集成了无线接入链路和无线回传链路，其中接入链路为用户设备(user equipment，UE)与IAB基站之间的通信链路，无线回传链路为IAB基站之间的通信链路，主要进行数据回传，而IAB基站不需要有线传输网络进行数据回传。因此，IAB基站降低了对有线传输网络的部署要求，可以部署在室外、室内等不易部署有线传输网络的场景下。
在IAB基站应用的过程中，移动基站中继MSBR(mobile base station relay)的应用也逐渐普及起来，MSBR可以理解为一个移动的IAB节点，能够更方便的为车内或车附近的UE提供服务。然而，由于MSBR具有移动性，如果为MSBR配置一个固定的跟踪区域码(tracking area code，TAC)，随着MSBR移动，网络侧可能无法确定MSBR所在的位置，进而也无法判断终端设备所在的位置。为了解决该问题，在MSBR进行IAB宿主节点切换时，新IAB宿主节点需要获取接入该MBSR的每个UE对应的核心网接入和移动性管理功能(access and mobility management function，AMF)的标识，并判断新IAB宿主节点是否跟每个AMF之间储存在N2接口，如果不存在，新IAB宿主节点可以指示MBSR广播的TAC需要发生改变，此时，UE能够执行移动性注册更新，从而使得网络侧获知UE当前所在位置。
然而，上述方法在触发MBSR改变广播的TAC时，初始IAB宿主节点需要将存储在MBSR上下文里面，当MBSR发生了切换流程，初始IAB宿主节点需要将包含所有的UE-AMF ID的MBSR上下文发送给新IAB宿主节点，这样可能导致暴露UE上下文的风险。因此，上述方法需要进一步优化。
发明内容
本申请实施例提供了一种通信方法、装置以及系统，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
第一方面，提供了一种通信方法，该方法应用于包括移动中继节点和至少两个接入网设备的通信系统，该方法包括：在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，所述第一接入网设备接收第一接入和移动管理功能AMF发送的第一指示信息，所述第一指示信息用于指示服务所述移动中继节点的AMF发生了重定向；所述第一接入网设备根据所述第一指示信息，向所述移动中继节点发送第二指示信息，所述第二指示信息用于指示所述移动中继节点改变广播的跟踪区域码TAC。
可选地，该移动中继节点为移动无线接入链路和无线回传链路IAB节点，或者移动基站中继MBSR节点，该移动中继节点包括：分布式单元DU和移动终端功能实体MT。
接入网设备在本申请中也可以称为IAB宿主节点或IAB宿主基站。移动中继节点在从第一接入网设备移动到第二接入网设备的过程中，第一AMF能够根据第二接入网设备标识选择第二AMF，即发生了AMF重定向。其中，第一AMF是发生了AMF重定向之前服务移动中继节点的AMF。第二AMF是发生了AMF重定向之后，服务移动中继节点的AMF。
本申请实施例中，在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，第一接入网设备在通过第一指示信息获知发生了AMF重定向的情况下，能够向移动中继节点发送第二指示信 息，指示移动中继节点改变广播的TAC。通过这样的方式，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
结合第一方面，在第一方面的某些实现方式中，所述第一接入网设备接收第一AMF发送的第一指示信息，包括：所述第一接入网设备接收第一AMF发送的切换命令消息，所述切换命令消息包括所述第一指示信息。
本申请实施例中，第一指示信息是通过第一AMF发送的切换命令消息承载的，第一接入网设备在接收到该切换命令消息后，能够获知该第一指示信息，从而向移动中继节点发送改变TAC的指示信息。
结合第一方面，在第一方面的某些实现方式中，在所述第一接入网设备所述接收第一AMF发送的第一指示信息之前，所述方法还包括：所述第一接入网设备接收所述移动中继节点发送的第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
本申请实施例中，第一接入网设备能够通过第三指示信息获知移动中继节点具有移动性，便于后续向移动中继节点发送改变TAC的指示信息。
结合第一方面，在第一方面的某些实现方式中，所述第一接入网设备根据所述第一指示信息，向所述移动中继节点发送第二指示信息，包括：所述第一接入网设备根据所述第一指示信息和所述第三指示信息，向所述移动中继节点发送第二指示信息。
本申请实施例中，第一接入网设备在获知了移动中继节点具有移动性的基础上，并且接收到了第一指示信息后，才能够向移动中继节点发送改变TAC的指示信息。
第二方面，提供了一种通信方法，所述方法应用于包括移动中继节点和至少两个接入网设备的通信系统，该方法包括：在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，所述第二接入网设备接收第二AMF发送的第四指示信息和第五指示信息，所述第四指示信息用于指示所述移动中继节点具有移动性，所述第五指示信息用于指示服务所述移动中继节点的AMF发生了重定向。所述第二接入网设备根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
可选地，该移动中继节点为移动无线接入链路和无线回传链路IAB节点，或者移动基站中继MBSR节点，该移动中继节点包括：分布式单元DU和移动终端功能实体MT。
本申请实施例中，在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，第二接入网设备在获知移动中继节点具有移动性以及发生了AMF重定向的情况下，第二接入网设备能够向移动中继节点发送改变TAC的指示信息。通过这样的方式，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
结合第二方面，在第二方面的某些实现方式中，在所述第二接入网设备根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息之前，所述方法还包括：所述第二接入网设备根据所述第四指示信息和所述第五指示信息在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；所述第二接入网设备接收所述移动中继节点发送的第二请求消息，所述第二请求消息用于建立所述第二接入网设备和所述移动中继节点之间的链接；所述第二接入网设备根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息，包括：所述第二接入网设备根据所述第二请求消息和所述第七指示信息，向所述移动中继节点发送第二响应消息，所述第二响应消息包括所述第六指示信息。
可选地，该第七指示信息可以是标志信息或者标志位。
可选地，该第二请求消息可以是F1建立请求消息，该第二响应消息可以是F1建立响应消息。
本申请实施例中，第二接入网设备在获知移动中继节点具有移动性以及发生了AMF重定向的情况下，第二接入网设备能够获知移动中继节点需要改变TAC，并在本地存储第七指示信息。在第二接入网设备接收到移动中继节点发送的第二请求消息后，第二接入网设备才能够向移动中继节点发送改变TAC的指示信息。
第三方面，提供了一种通信方法，该方法应用于包括移动中继节点和至少两个接入网设备的通信系统，所述方法包括：第二AMF接收第一AMF发送的移动中继节点的上下文，所述移动中继节点的上下文用于指示所述移动中继节点具有移动性；所述第二AMF根据所述移动中继节点的上下文，向所 述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
可选地，该移动中继节点为移动无线接入链路和无线回传链路IAB节点，或者移动基站中继MBSR节点，该移动中继节点包括：分布式单元DU和移动终端功能实体MT。
可选地，该移动中继节点的上下文可以是移动中继节点中MT的上下文。
本申请实施例中，在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，第二AMF在获知移动中继节点具有移动性的情况下，第二AMF能够向移动中继节点发送改变TAC的指示信息。通过这样的方式，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
结合第三方面，在第三方面的某些实现方式中，所述第二AMF根据所述移动中继节点的上下文，向所述移动中继节点发送第六指示信息，包括：所述第二AMF接收所述移动中继节点发送的注册请求消息；所述第二AMF根据所述移动中继节点的上下文以及所述注册请求消息，向所述移动中继节点发送注册接受消息，所述注册接受消息包括所述第六指示信息。
本申请实施例中，在第二AMF接收了移动中继发送的注册请求消息的情况下，向移动中继发送注册接受消息，并在注册接受消息中携带第六指示信息，从而指示移动中继节点改变广播的TAC。
结合第三方面，在第三方面的某些实现方式中，在所述第二AMF接收所述移动中继发送的注册请求消息之前，所述方法还包括：所述第二AMF根据所述移动中继节点的上下文在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；所述第二AMF根据所述移动中继节点的上下文以及所述注册请求消息，向所述移动中继发送注册接受消息，包括：所述第二AMF根据所述注册请求消息和所述第七指示信息，向所述移动中继节点发送所述注册接受消息。
本申请实施例中，第二AMF在获知移动中继节点具有移动性的情况下，第二AMF能够获知移动中继节点需要改变TAC，并在本地存储第七指示信息。在第二AMF接收到移动中继节点发送的注册请求消息后，第二AMF才能够向移动中继节点发送改变TAC的指示信息。
第四方面，提供了一种通信方法，该方法应用于包括移动中继节点和至少两个接入网设备的通信系统，该方法包括：所述移动中继节点广播第一TAC；所述移动中继节点从第一接入网设备移动到第二接入网设备；所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，所述第二指示信息或所述第六指示信息用于指示所述移动中继节点改变的TAC；所述移动中继节点根据所述第二指示信息或所述第六指示信息广播第二TAC。
可选地，所述第一设备为第一接入网设备、第二接入网设备，或者第二AMF中的任一种。
本申请实施例中，移动中继节点在从第一接入网设备移动到第二接入网设备过程中，接收到第一设备发送的第二指示信息或第六指示信息后能够改变广播的TAC。通过这样的方式，移动中继节点能够更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
结合第四方面，在第四方面的某些实现方式中，所述第一设备为所述第一接入网设备，所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，包括：所述移动中继节点接收第一接入网设备发送的切换命令消息或者F1配置更新消息，所述切换命令消息或所述F1配置更新消息包括所述第二指示信息。
本申请实施例中，当第一设备为第一接入网设备时，移动中继节点能够接收第一接入网设备发送的切换命令消息或者F1配置更新消息，在该消息中携带第二指示信息，从而使得移动中继节点根据第二指示信息改变广播的TAC。
结合第四方面，在第四方面的某些实现方式中，在所述移动中继节点接收所述第一接入网设备发送的切换命令消息或者F1配置更新消息之前，所述方法还包括：所述移动中继节点向所述第一接入网设备发送第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
本申请实施例中，在移动中继节点接收第一接入网设备发送的切换命令消息或者F1配置更新消息之前，移动中继节点能够向第一接入网设备发送第一请求消息，在该第一请求消息中携带第三指示信息，从而告知第一接入网设备移动中继节点具有移动性。
结合第四方面，在第四方面的某些实现方式中，所述第一设备为所述第二接入网设备，所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息之前，所述方法还包括：所述移动中继节 点向所述第二接入网设备发送第二请求消息，所述第二请求消息用于建立所述移动中继节点和所述第二接入网之间的链接；所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，包括：所述移动中继节点接收第二接入网设备发送的第二响应消息，所述第二响应消息包括所述第六指示信息。
本申请实施例中，当第一设备为第二接入网设备时，移动中继节点能够接收第二接入网设备发送的第二响应消息，并在该消息中携带第六指示信息，从而使得移动中继节点根据第六指示信息改变广播的TAC。
结合第四方面，在第四方面的某些实现方式中，所述第一设备为第二AMF，所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息之前，所述方法还包括：
所述移动中继节点向第二AMF发送注册请求消息；所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，包括：所述移动中继节点接收第二AMF发送注册接受消息，所述注册接受消息包括所述第六指示信息。
本申请实施例中，当第一设备为第二AMF时，移动中继节点能够接收第二AMF发送的注册接受消息，并在该消息中携带第六指示信息，从而使得移动中继节点根据第六指示信息改变广播的TAC。
第五方面，提供了一种通信装置，该装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元，用于在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，接收第一AMF发送的第一指示信息，所述第一指示信息用于指示服务所述移动中继节点的AMF发生了重定向；所述收发单元，还用于根据所述第一指示信息，向所述移动中继节点发送第二指示信息，所述第二指示信息用于指示所述移动中继节点改变广播的TAC。
结合第五方面，在第五方面的某些实现方式中，所述收发单元，具体用于接收第一AMF发送的切换命令消息，所述切换命令消息包括所述第一指示信息。
结合第五方面，在第五方面的某些实现方式中，所述收发单元，还用于接收所述移动中继节点发送的第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
结合第五方面，在第五方面的某些实现方式中，所述收发单元，具体用于根据所述第一指示信息和所述第三指示信息，向所述移动中继节点发送第二指示信息。
第六方面，提供了一种通信装置，该装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元，用于在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，接收第二AMF发送的第四指示信息和第五指示信息，所述第四指示信息用于指示所述移动中继节点具有移动性，所述第五指示信息用于指示服务所述移动中继节点的AMF发生了重定向；所述收发单元，还用于根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
结合第六方面，在第六方面的某些实现方式中，所述装置还包括处理单元，所述处理单元，用于根据所述第四指示信息和所述第五指示信息在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；所述收发单元，还用于接收所述移动中继节点发送的第二请求消息，所述第二请求用于建立所述第二接入网设备和所述移动中继节点之间的链接；所述收发单元，具体用于根据所述第二请求消息和所述第七指示信息，向所述移动中继节点发送第二响应消息，所述第二响应消息包括所述第六指示信息。
第七方面，提供了一种通信装置，该装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元，用于接收第一AMF发送的移动中继节点的上下文，所述移动中继节点的上下文用于指示所述移动中继节点具有移动性；所述收发单元，还用于根据所述移动中继节点的上下文，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
结合第七方面，在第七方面的某些实现方式中，所述收发单元，还用于接收所述移动中继发送的注册请求消息；所述收发单元，还用于根据所述移动中继节点的上下文以及所述注册请求消息，向所述移动中继节点发送注册接受消息，所述注册接受消息包括所述第六指示信息。
结合第七方面，在第七方面的某些实现方式中，所述装置还包括处理单元；所述处理单元，用于根 据所述移动中继节点的上下文在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；所述收发单元，具体用于根据所述注册请求消息和所述第七指示信息，向所述移动中继节点发送所述注册接受消息。
第八方面，提供了一种通信装置，所述装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元，用于广播第一TAC；所述移动中继节点从第一接入网设备移动到第二接入网设备；所述收发单元，还用于接收第一设备发送的第二指示信息或第六指示信息，所述第二指示信息或所述第六指示信息用于指示所述移动中继节点改变的TAC；所述收发单元，还用于所述根据第二指示信息或所述第六指示信息广播第二TAC。
结合第八方面，在第八方面的某些实现方式中，所述第一设备为第一接入网设备、第二接入网设备，或者第二AMF中的任一种。
结合第八方面，在第八方面的某些实现方式中，所述第一设备为所述第一接入网设备，所述收发单元，具体用于接收第一接入网设备发送的切换命令消息或者F1配置更新消息，所述切换命令消息或所述F1配置更新消息包括所述第二指示信息。
结合第八方面，在第八方面的某些实现方式中，所述收发单元，还用于向所述第一接入网设备发送第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
结合第八方面，在第八方面的某些实现方式中，所述第一设备为所述第二接入网设备，所述收发单元，还用于向所述第二接入网设备发送第二请求消息，所述第二请求消息用于建立所述移动中继节点和所述第二接入网之间的链接；所述收发单元，具体用于接收第二接入网设备发送的第二响应消息，所述第二响应消息包括所述第六指示信息。
结合第八方面，在第八方面的某些实现方式中，所述第一设备为第二AMF，所述收发单元，还用于向第二AMF发送注册请求消息；所述收发单元，具体用于接收第二AMF发送注册接受消息，所述注册接受消息包括所述第六指示信息。
结合第八方面，在第八方面的某些实现方式中，所述移动中继节点为移动无线接入链路和无线回传链路IAB节点，或者移动基站中继MBSR节点，所述移动中继节点包括：分布式单元DU和移动终端功能实体MT
第九方面，提供了一种该装置包括：至少一个处理器和存储器，所述至少一个处理器与所述存储器耦合，用于读取并执行所述存储器中的指令，该装置用于执行上述第一方面至第三方面中任意一种实现方式的方法。
第十方面，提供一种计算机可读介质，所述计算机可读介质存储有程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述第一方面至第三方面中任意一种实现方式的方法。
第十一方面，提供了一种通信系统，该系统包括：上述第四方面中任意一种实现方式中的通信装置、上述第五方面中任意一种实现方式中的通信装置和上述第七方面中任意一种实现方式中的通信装置。
附图说明
图1示出了适用于本申请实施例的网络架构的一示意图；
图2示出了适用于本申请实施例的网络架构的另一示意图；
图3示出了适用于本申请实施例的网络架构的另一示意图；
图4示出了一种IAB整体架构和接口示意图；
图5示出了一种IAB-MT入网的示意性流程图；
图6示出了一种移动基站中继的应用场景；
图7示出了一种新IAB节点触发TAC改变的应用场景图；
图8是本申请实施例提供的通信方法所适用的应用场景；
图9是本申请实施例提供的一种通信方法的流程性示意图；
图10是本申请实施例提供的另一种通信方法的流程性示意图；
图11是本申请实施例提供的再一种通信方法的流程性示意图；
图12是本申请实施例提供的再一种通信方法的流程性示意图；
图13是本申请实施例提供的再一种通信方法的流程性示意图；
图14是本申请实施例提供的再一种通信方法的流程性示意图；
图15是本申请实施例提供的一种通信装置的示意性框图；
图16是本申请实施例提供的另一种通信装置的示意性框图；
图17是本申请实施例提供的一种通信装置的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：5G系统或新无线NR、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)等。本申请提供的技术方案还可以应用于未来的通信系统，如第六代移动通信系统。本申请实施例的技术方案还可以应用于设备到设备(device to device，D2D)通信，车辆外联(vehicle-to-everything，V2X)通信，机器到机器(machine to machine，M2M)通信，机器类型通信(machine type communication，MTC)，以及物联网(internet of things，IoT)通信系统或者其他通信系统。
为便于理解本申请实施例，结合图1至图3详细说明适用于本申请实施例的通信系统。
作为示例性说明，图1示出了适用于本申请实施例的网络架构的一示意图。如图1所示，该网络架构例如可以包括但不限于以下：UE、接入网(access network，AN)、核心网(core)、数据网络(Data Network)等。逻辑上它们可以分为用户面和控制面两部分，控制面负责移动网络的管理，用户面负责业务数据的传输。图1中，N2参考点位于AN控制面和Core控制面之间，N3参考点位于AN用户面和Core用户面之间，N6参考点位于Core用户面和数据网络之间。
下面对图1中示出的各组分做简单介绍：
UE：是移动用户与网络交互的入口，能够提供基本的计算能力，存储能力，向用户显示业务窗口，接受用户操作输入。NextGen UE会采用新空口技术，与AN建立信号连接，数据连接，从而传输控制信号和业务数据到移动网络。
AN：类似于传统网络里面的基站，部署在靠近UE的位置，为特定区域的授权用户提供入网功能，并能够根据用户的级别，业务的需求等确定不同质量的传输隧道来传输用户数据。AN能够管理自身的资源，合理利用，按需为UE提供接入服务，并负责把控制信号和用户数据在UE和核心网之间转发。
Core：负责维护移动网络的签约数据，管理移动网络的网元，为UE提供会话管理，移动性管理，策略管理，安全认证等功能。在UE附着的时候，为UE提供入网认证；在UE有业务请求时，为UE分配网络资源；在UE移动的时候，为UE更新网络资源；在UE空闲的时候，为UE提供快恢复机制；在UE去附着的时候，为UE释放网络资源；在UE有业务数据时，为UE提供数据路由功能，如转发上行数据到Data Network；或者从Data Network接收UE下行数据，转发到AN，从而发送给UE。
Data Network：是为用户提供业务服务的数据网络，一般客户端位于UE，服务端位于数据网络。数据网络可以是私有网络，如局域网，也可以是不受运营商管控的外部网络，如Internet，还可以是运营商共同部署的专有网络，如提供IMS服务的网络。
作为示例性说明，图2示出了适用于本申请实施例的网络架构的另一示意图。
图2是在图1的基础上对5G网络架构的核心网的进一步细化，该网络架构例如可以包括但不限于以下：UE；用户面功能(user plane function，UPF)；认证服务器功能(authentication server function，AUSF)，核心网接入和移动性管理功能AMF，会话管理功能(session management function,SMF)，网络切片选择功能(Network Slice Selection Function，NSSF)，网络开放功能(network exposure function，NEF)，网络功能仓储功能(NF repository function，NRF)，统一数据管理(unified data management，UDM)，策略控制功能(policy control function，PCF)，应用功能(application function，AF)。
下面对图2中示出的各组分做简单介绍：
1、用户设备UE、可以称为接入终端、用户单元、用户站、移动站、移动台(mobile station，MS)、移动终端(mobile terminal，MT)、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、 用户代理或用户装置。用户设备可以是一种向用户提供语音/数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端的举例可以为：手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑(如笔记本电脑、掌上电脑等)、移动互联网设备(mobile internet device，MID)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5G网络中的用户设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的用户设备等。
此外，用户设备还可以是物联网(Internet of things，IoT)系统中的用户设备。IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。IoT技术可以通过例如窄带(narrow band，NB)技术，做到海量连接，深度覆盖，终端省电。
此外，用户设备还可以包括智能打印机、火车探测器、加油站等传感器，主要功能包括收集数据(部分用户设备)、接收网络设备的控制信息与下行数据，并发送电磁波，向网络设备传输上行数据。
应理解，用户设备可以是任何可以接入网络的设备。用户设备与接入网设备之间可以采用某种空口技术相互通信。
可选地，UE可以用于充当基站。例如，UE可以充当调度实体，其在V2X或D2D等中的UE之间提供侧行链路信号。比如，蜂窝电话和汽车利用侧行链路信号彼此通信。蜂窝电话和智能家居设备之间通信，而无需通过基站中继通信信号。
2、接入网(access network，AN)：接入网可以为特定区域的授权用户提供入网功能，包含无线接入网(radio access network，RAN)设备和AN设备。RAN设备主要是第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)网络无线网络设备，AN设备可以是非3GPP(non-3GPP)定义的接入网设备。
接入网络可以为采用不同接入技术的接入网络。目前的无线接入技术有两种类型：3GPP接入技术(例如3G、4G或5G系统中采用的无线接入技术)和非3GPP(non-3GPP)接入技术。3GPP接入技术是指符合3GPP标准规范的接入技术，例如，5G系统中的接入网设备称为下一代基站节点(next generation Node Base station，gNB)或者RAN。非3GPP接入技术是指不符合3GPP标准规范的接入技术，例如，以无线保真(wireless fidelity，WiFi)中的接入点(access point，AP)为代表的空口技术、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)、码分多址(code division multiple access，CDMA)网络等。接入网设备(AN设备)可以允许终端设备和3GPP核心网之间采用非3GPP技术互连互通。
基于无线通信技术实现接入网络功能的接入网可以称为RAN。无线接入网能够负责空口侧的无线资源管理、服务质量(quality of service，QoS)管理、数据压缩和加密等功能。无线接入网为终端设备提供接入服务，进而完成控制信号和用户数据在终端和核心网之间的转发。接入网可以为小区提供服务。终端设备可以通过接入网设备分配的传输资源(例如，频域资源，或者说，频谱资源)与小区通信。
无线接入网例如可以包括但不限于：宏基站、微基站(也称为小站)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，WiFi系统中的AP、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G(如，NR)系统中的gNB或传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)或分布式单元(distributed unit，DU)，或者下一代通信6G系统中的基站等。本申请实施例对无线接入网设备所采用的具体技术和具 体设备形态不做限定。
可选的，在接入设备的一些部署中，接入设备可以包括集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)等。在接入设备的另一些部署中，CU还可以划分为CU-控制面(control plane，CP)和CU-用户面(user plan，UP)等。在接入设备的又一些部署中，接入设备还可以是开放的无线接入网(open radio access network，ORAN)架构等，本申请对于接入设备的具体部署方式不作限定。
应理解，本申请对接入网设备的具体类型不作限定。采用不同无线接入技术的系统中，具备接入网设备功能的设备的名称可能会有所不同。
3、AMF：主要用于移动性管理和接入管理等，如用户位置更新、用户注册网络、用户切换等。AMF还可用于实现移动性管理实体(mobility management entity，MME)中除会话管理之外的其它功能。例如，合法监听、或接入授权(或鉴权)等功能。
4、SMF：主要用于会话管理、UE的网际协议(Internet Protocol，IP)地址分配和管理、选择可管理用户平面功能、策略控制、或收费功能接口的终结点以及下行数据通知等。在本申请实施例中，SMF主要用户负责移动网络中的会话管理，如会话建立、修改、释放等。具体功能例如可以包括为终端设备分配IP地址、选择提供报文转发功能的UPF等。
5、UPF：负责终端设备中用户数据的转发和接收。UPF网元可以从数据网络(data network，DN)接收用户数据，通过接入网设备传输给终端设备。UPF网元还可以通过接入网设备从终端设备接收用户数据，转发到数据网络。UPF网元中为终端设备提供服务的传输资源和调度功能由SMF网元管理控制的。
6、数据网络(DN)：用于为用户提供数据服务的服务网络。例如，因特网(Internet)、第三方的业务网络、IP多媒体服务业务(IP multi-media service，IMS)网络等。
7、PCF：用于指导网络行为的统一策略框架，为控制平面功能网元(例如AMF，SMF网元等)提供策略规则信息，负责获取与策略决策相关的用户签约信息等。
8、AF：主要支持与3GPP核心网交互来提供服务，例如影响数据路由决策、与策略控制功能(PCF)交互、或者向网络侧提供第三方等。
9、UDM：用于生成认证信任状，用户标识处理(如存储和管理用户永久身份等)，接入授权控制和签约数据管理等。
10、NRF：为其他网元提供网络功能实体信息的存储功能和选择功能。
11、AUSF：执行UE的安全认证。
12、NEF：以北向应用编程接口(application programming interface，API)接口的方式向第三方开放网络功能。
13、NSSF：为UE选择网络切片。
在图2所示的网络架构中，各网元之间可以通过图中所示的接口通信，部分接口可以采用服务化接口的方式实现。如图2所示，UE和AMF之间可以通过N1接口进行交互，交互消息例如可以称为N1消息(N1 Message)。RAN和AMF之间可以通过N2接口进行交互，N2接口可以用于非接入层(non-access stratum，NAS)消息的发送等。RAN和UPF之间可以通过N3接口进行交互，N3接口可以用于传输用户面的数据等。SMF和UPF之间可以通过N4接口进行交互，N4接口可以用于传输例如N3连接的隧道标识信息，数据缓存指示信息，以及下行数据通知消息等信息。其他接口与各网元之间的关系如图2中所示，为了简洁，这里不一一详述。
应理解，上述应用于本申请实施例的网络架构仅是示例性说明，适用本申请实施例的网络架构并不局限于此，任何能够实现上述各个网元的功能的网络架构都适用于本申请实施例。
还应理解，图2中所示的AMF、SMF、UPF、PCF、UDM等可以理解为用于实现不同功能的网元。这些网元可以各自独立的设备，也可以集成于同一设备中实现不同的功能，或者可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能，本申请对于上述网元的具体形态不作限定。
还应理解，上述命名仅为便于区分不同的功能而定义，不应对本申请构成任何限定。本申请并不排除在5G网络以及未来其它的网络中采用其他命名的可能。例如，在6G网络中，上述各个网元中的 部分或全部可以沿用5G中的术语，也可能采用其他名称等。
还应理解，图2中的各个网元之间的接口名称只是一个示例，具体实现中接口的名称可能为其他的名称，本申请对此不作具体限定。此外，上述各个网元之间的所传输的消息(或信令)的名称也仅仅是一个示例，对消息本身的功能不构成任何限定。
图3是在图1的基础上对5G网络架构的核心网的进一步细化，图3中的各网元功能的介绍可以参考图2中对应网元功能的介绍，图3和图2的主要区别在于，图3中各个网元之间的接口是点对点的接口，而不是服务化的接口。
随着5G网络的正式商用，5G网络开始逐渐应用于各行各业。在5G新空口NR研究中提出了集成无线接入链路和无线回传链路IAB的基站。所谓IAB基站，是该基站集成了无线接入链路和无线回传链路，其中接入链路为用户设备UE与IAB基站之间的通信链路，无线回传链路为IAB基站之间的通信链路，主要进行数据回传，而IAB基站不需要有线传输网络进行数据回传。因此，IAB基站降低了对有线传输网络的部署要求，可以部署在室外、室内等不易部署有线传输网络的场景下。
下面结合图4和图5详细介绍IAB基站的整体架构和入网流程。
图4示出了一种IAB整体架构和接口示意图。
IAB基站启动后其移动终端(mobile-termination，MT)功能将通过小区选择接入网络，5G基站(gNB)能够协助IAB基站接入IAB网络，解决了IAB基站启动后能够最终接入IAB网络的问题。为了实现上述过程，图4所示的IAB架构需要包括CU、DU和MT。其中，CU主要处理非实时的无线高层协议栈功能(例如，无线资源控制(radio resource control，RRC)/分组数据汇聚协议packet data convergence protocol，PDCP)。DU主要处理物理层功能和实时性需求较高的层2功能(例如，端口物理层(port physical layer，PHY)/媒体存取控制(media access control,MAC)/无线链路控制(radio link control，RLC))。MT是IAB节点的一个功能实体，用于IAB节点和IAB宿主节点或者其他IAB节点之间的回传链路的Uu口终结点。
图5示出了一种IAB-MT入网的示意性流程图，方法500可以包括如下步骤。
S501，IAB-MT向RAN发送注册请求消息。
具体地，IAB节点通过其MT功能连接到网络，进行小区选择，选择合适的小区完成RRC连接后，IAB节点能够通过RRC建立完成消息向告知网络侧自己是IAB节点，并通过MT功能向RAN发送注册请求消息，在该过程中，IAB的初始接入过程与常规的UE接入过程相同。
S502，RAN向5G核心网(5G Core Network，5GC)发送N2消息。
具体地，服务IAB-MT的RAN可以通过N2消息将注册请求消息发送至核心网，该N2消息可以用于指示注册核心网中的是IAB节点，并且核心网能够对该IAB节点进行身份验证。
S503，IAB-MT成功注册到核心网中。
具体地，在核心网对该IAB节点验证成功后，IAB-MT能够成功注册到核心网中。
S504，IAB-MT发起会话建立。
具体地，核心网给IAB-MT分配IP地址，IAB-MT使用该IP地址和操作、管理和维护(operations administration and maintenance，OAM)功能交互。
S505，OAM给IAB节点配置小区信息。
具体地，OAM能够给IAB节点配置小区信息，例如，小区标识，TAC等信息。
S506，IAB-DU向IAB宿主-CU发送F1建立请求消息。
具体地，IAB宿主-CU在接收到F1建立请求消息后，能够激活IAB-DU的小区。
S507，IAB宿主-CU进行配置更新。
具体地，IAB宿主-CU可以通过配置更新流程，向核心网发送配置信息。
可选地，方法500在步骤S506之后，可以不进行步骤S507，直接进行步骤S508。
S508，IAB宿主-CU可以向IAB-DU发送F1建立响应信息。在该消息中，携带激活后的小区信息，该激活后的小区信息中可以包括小区标识。
方法500介绍了传统的IAB-MT入网、F1建立和小区激活流程。传统的IAB基站是地面上固定不动的中继节点，在一些移动的场景下，传统的IAB基站提供的功能无法满足用户特定的需求。在此基础上，如图6所示，移动基站中继MSBR(mobile base station relay)的应用也逐渐普及起来，MSBR可 以理解为一个移动的IAB节点，能够更加方便的为车内或车附近的UE提供服务。对于处于移动状态的MSBR，IAB架构同样适用。即MSBR包括IAB-MT和IAB-DU。与现有的IAB架构类似，MSBR可以通过无线接口以类似终端的方式接入一个服务于它的基站，该基站可以称为宿主基站(donor base station)或者IAB宿主节点或IAB宿主基站，中继设备和宿主基站之间的无线接口链路称为回传链路(back haul link)。此外，MSBR还可以通过其MT功能接入网络，之后由操作、管理和维护(Operations,Administration and Maintenance，OAM)设备为该MSBR配置小区信息。
然而，由于MSBR具有移动性，如果为MSBR配置一个固定的TAC(例如，TAC#1)，则会导致如下问题：MSBR位于基站1的小区101时，MSBR发出的广播消息中包括的TAC为TAC#1。当移动中继移动至基站1的小区102时，MSBR广播的TAC未发生变化，该MSBR发出的广播消息依然为TAC#1。对于接入MSBR的UE而言，该UE接入的MSBR的小区对应的TAC为TAC#1。但是，由于MSBR具有移动能力，因此网络侧无法确定MSBR所处的位置(例如，无法确定该MSBR位于小区101还是小区102)，进而也无法确定出UE所在的位置。
为了解决这一问题，如图7所示，MBSR初始配置TAC#1并进行广播，随着MBSR的移动，MBSR将会发生IAB宿主节点切换。新IAB宿主节点不能够继续访问UE-AMF，即新IAB宿主节点和服务UE的AMF之间不存在N2连接。此时，新IAB节点指示MBSR广播的TAC需要发生改变(例如，MBSR广播TAC#2)，因此触发UE执行移动新注册更新，网络侧可获知UE当前所在的位置为TAC#2。
然而，上述方案在触发MBSR改变广播的TAC要求UE入网时，初始IAB宿主节点需要将接入该MBSR的每个UE对应的UE-AMF ID存放在MBSR上下文里面，当MBSR发生了切换流程时，初始IAB宿主节点需要将所有的UE-AMF ID发送给新IAB宿主节点，即MBSR目标里面包括了UE-AMF列表，这样，需要将接入MBSR的所有UE的部分上下文跟MBSR绑定，存在暴露UE上下文的风险。此外，在MBSR的切换过程中，需要新IAB宿主节点逐一地判断是否跟每个UE-AMF存在N2接口，这会对新IAB宿主节点内部处理过程造成一定的影响。而且，MBSR是否需要改变TAC跟UE-AMF的服务区域进行了强绑定，极端的情况下如果没有UE接入MBSR，MBSR广播的TAC就会一直保持不变。因此，上述方法需要进一步优化。
本申请实施例提供了一种通信方法，能够在MBSR切换的过程中，避免接入MBSR的UE的部分上下文跟MBSR进行绑定，并且，能够更简单、有效的判断出IAB节点是否需要更新广播的TAC。
应理解，本申请实施例中的MBSR也可称为车载中继(vehicle mounted relay，VMR)、移动IAB节点或移动中继节点。
在介绍本申请实施例提供的通信方法之前，首先介绍本申请实施例提供的通信方法所适用的应用场景。
图8是本申请实施例提供的通信方法所适用的应用场景。
如图8所示，当MBSR发生移动时考虑到IAB-MT一直处于连接状态，IAB-MT将会经历正常的切换流程(Xn切换或者N2切换)，因此可以根据MT切换过程中，是否执行IAB-AMF重定向来判断是否更新IAB-DU广播TAC。其中，IAB-AMF指的是服务MT的AMF，即当MT发生切换时，如果AMF不发生重定向，则移动IAB的广播的TAC不发生改变。当MT发生切换时，如果AMF发生重定向，移动IAB广播的TAC发生改变，触发驻留在移动IAB小区的UE发起跟踪区域更新(tracking area update，TAU)流程。
应理解，本申请实施例中的IAB-MT也可称为MBSR-MT，或者移动IAB-MT，本申请实施例中的IAB-DU也可称为MBSR-DU，或者移动IAB-DU。
图9是本申请实施例提供的一种通信方法的流程性示意图，方法900可应用于包括移动中继节点和至少两个接入网设备的通信系统，方法900可应用于移动中继节点从第一接入网设备移动到第二接入网设备的过程中，方法900可以包括如下步骤。
S901，移动中继节点向第一接入网设备发送第一请求消息。
其中，该第一请求消息中可以携带第三指示信息，该第三指示信息用于指示移动中继节点具有移动性。
该移动中继节点为移动的无线接入链路和无线回传链路IAB节点(即具有移动性的IAB节点)，或者移动的基站中继MBSR节点，该移动中继节点包括：分布式单元DU和移动终端功能实体MT。
可选地，该第一请求消息包括：移动中继节点中分布式单元的ID和/或第一TAC。
其中，移动中继节点获取第一TAC的方法，本申请不做限定。
作为一种实现方式，第一TAC可以是移动中继节点从OAM获取的。或者，第一TAC也可以是预先配置在移动中继节点上的。
作为一种实现方式，第一请求消息可以是F1建立请求消息。该F1建立请求消息用于建立移动中继节点和第一接入网设备之间的F1链接。
具体地，步骤S901可以理解为:移动中继节点的DU功能向第一接入网设备的CU功能发送F1建立请求消息。
可选地，在步骤S901之前，方法900还包括移动中继节点的MT功能通过第一接入网设备发起注册流程并注册到第一AMF上。该第一AMF为移动中继节点的MT功能服务。为了描述方便，以下简称第一AMF为移动中继节点服务。需要注意的是，在该注册过程中，第一AMF获知移动中继节点具有移动性，可以将用于指示移动中继节点具有移动性的指示信息存在移动中继节点的上下文中。
S902，移动中继节点向UE广播第一TAC。
具体地，当移动中继节点从第一接入网设备接收第一响应消息之后，移动中继节点可以向UE广播第一TAC。
S903，第一接入网设备接收第一AMF发送的第一指示信息。
其中，该第一指示消息用于指示服务移动中继节点的AMF发生了重定向。
可选地，该第一指示信息也可以通过切换命令消息承载，即第一接入网设备接收第一AMF发送的切换命令消息，该切换命令消息中包括第一指示信息。
应理解，接入网设备在本申请中也可以称为IAB宿主节点或IAB宿主基站。移动中继节点在从第一接入网设备移动到第二接入网设备的过程中，第一AMF能够根据第二接入网设备标识选择第二AMF，即发生了AMF重定向。其中，第一AMF是发生了AMF重定向之前服务移动中继节点的AMF。第二AMF是发生了AMF重定向之后，服务移动中继节点的AMF。
S904，第一接入网设备根据第一指示信息，向移动中继节点发送第二指示信息。
其中，第二指示信息用于指示移动中继节点改变广播的TAC。
可选地，第一接入网设备可以向移动中继节点发送切换命令消息或F1配置更新消息，该切换命令消息或F1配置更新消息中包括所述第二指示信息。
可选地，第一接入网设备根据第一指示信息和第三指示信息，向移动中继节点发送第二指示信息。
S905，移动中继节点向UE广播第二TAC。
其中，移动中继节点获取第二TAC的方法，本申请不做限定。
作为一种实现方式，第二TAC可以是移动中继节点从OAM获取的，例如，当移动中继节点接收到第二指示信息之后，可以向OAM请求分配新的TAC。
作为另外一种实现方式，第二TAC也可以是预先配置在移动中继节点上的。例如，第一TAC和第二TAC都是预先配置在移动中继节点上的。
可选地，当第二TAC预先配置在移动中继节点上时，移动中继节点在接收到第六指示信息后，可以先去激活第一TAC，再激活第二TAC(即启动第二TAC)，然后向UE广播第二TAC。
其中，移动中继节点向UE广播第二TAC可以理解为：移动中继节点不再广播第一TAC，而是广播第二TAC。
本申请实施例中，在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，第一接入网设备在通过第一指示信息获知发生了AMF重定向的情况下，能够向移动中继节点发送第二指示信息，指示移动中继节点改变广播的TAC。通过这样的方式，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
图10是本申请实施例提供的另一种通信方法的流程性示意图，方法1000可应用于包括移动中继节点和至少两个接入网设备的通信系统，方法1000可应用于移动中继节点从第一接入网设备移动到第二接入网设备的过程中，方法1000可以包括如下步骤。
S1001，移动中继节点向UE广播第一TAC。
可选地，该移动中继节点为移动的无线接入链路和无线回传链路IAB节点(即具有移动性的IAB 节点)，或者移动基站中继MBSR节点，该移动中继节点包括：分布式单元DU和移动终端功能实体MT。
作为一种实现方式，第一TAC可以是移动中继节点从OAM获取的，或者，也可以是预先配置在移动中继节点上的，本申请不做限定。
可选地，在步骤S1001之前，方法1000还包括移动中继节点的MT功能通过第一接入网设备发起注册流程并注册到第一AMF上。第一AMF为移动中继节点的MT功能服务。为了描述方便，以下简称第一AMF为移动中继节点服务。需要注意的是，在该注册过程中，第一AMF获知移动中继节点具有移动性，可以将用于指示移动中继节点具有移动性的指示信息存在移动中继节点的上下文中。
S1002，第二接入网设备接收第二AMF发送的第四指示信息和第五指示信息。
其中，第四指示信息用于指示移动中继节点具有移动性，第五指示信息用于指示服务移动中继节点的AMF发生了重定向。
应理解，接入网设备在本申请中也可以称为宿主基站、IAB宿主节点或IAB宿主基站。移动中继节点在从第一接入网设备移动到第二接入网设备的过程中，第一AMF能够根据第二接入网设备标识选择第二AMF，即发生了AMF重定向。其中，第一AMF是发生了AMF重定向之前服务移动中继节点的AMF。第二AMF是发生了AMF重定向之后，服务移动中继节点的AMF。
可选地，在AMF重定向过程中，第一AMF将移动中继节点的上下文中存储的用于指示移动中继节点具有移动性的指示信息发送给第二AMF。第二AMF基于移动中继节点的上下文确定第四指示信息。
S1003，第二接入网设备本地保存第七指示信息。
其中，该第七指示信息用于指示所述移动中继节点需要改变TAC，该第七指示信息可以是第二接入网设备接收第四指示信息和第五指示信息后，自己生成并保存在本地的。
可选地，该第七指示信息可以是标志信息或者标志位。
S1004，第二接入网设备接收移动中继节点发送的第二请求消息。
其中，该第二请求消息用于建立第二接入网设备和移动中继节点之间的链接。
可选地，该第二请求消息可以是F1建立请求消息。具体地，移动中继节点的DU功能向第二接入网设备的CU功能发送F1建立请求消息。
S1005，移动中继节点接收第二接入网设备发送的第六指示信息。
具体地，第二接入网设备在接收到第二请求信息后，可以根据第二请求消息和第七指示信息，向移动中继节点发送第六指示信息，该第六指示信息用于指示移动中继节点改变广播的TAC。
可选地，第六指示信息可以承载在第二响应消息中，即移动中继节点接收第二接入网设备发送的第二响应消息，该第二响应消息包括该第六指示信息。
可选地，该第二响应消息可以是F1建立响应消息。具体地，第二接入网设备的CU功能向移动中继节点的DU功能发送F1建立响应消息。
S1006，移动中继节点向UE广播第二TAC。
其中，移动中继节点获取第二TAC的方法，本申请不做限定。
作为一种实现方式，第二TAC可以是移动中继节点从OAM获取的，例如，当移动中继节点接收到第二指示信息之后，可以向OAM请求分配新的TAC。
作为另外一种实现方式，第二TAC也可以是预先配置在移动中继节点上的。例如，第一TAC和第二TAC都是预先配置在移动中继节点上的。
可选地，当第二TAC预先配置在移动中继节点上时，移动中继节点在接收到第六指示信息后，可以先去激活第一TAC，再激活第二TAC(即启动第二TAC)，然后向UE广播第二TAC。
其中，移动中继节点向UE广播第二TAC可以理解为：移动中继节点不再广播第一TAC，而是广播第二TAC。
此外，移动中继节点向UE广播第二TAC之前还包括移动中继节点将获取的第二TAC发送给第二接入网设备，以便第二接入网设备感知移动中继节点广播的TAC参数是哪个。例如，移动中继节点向第二接入网设备发送DU配置更新消息(gNB-DU Configuration Update)，该消息中携带第二TAC。
本申请实施例中，在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，第二接入 网设备在获知移动中继节点具有移动性以及发生了AMF重定向的情况下，第二接入网设备能够向移动中继节点发送改变TAC的指示信息。通过这样的方式，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
图11是本申请实施例提供的再一种通信方法的流程性示意图，方法1100可应用于包括移动中继节点和至少两个接入网设备的通信系统，方法1100可应用于移动中继节点从第一接入网设备移动到第二接入网设备的过程中，方法1100可以包括如下步骤。
S1101，移动中继节点向UE广播第一TAC。
该移动中继节点为移动的无线接入链路和无线回传链路IAB节点(即具有移动性的IAB节点)，或者移动的基站中继MBSR节点，该移动中继节点包括：分布式单元DU和移动终端功能实体MT。
作为一种实现方式，第一TAC可以是移动中继节点从OAM获取的，或者，也可以是预先配置在移动中继节点上的，本申请不做限定。
可选地，在步骤S1101之前，方法1100还包括移动中继节点的MT功能通过第一接入网设备发起注册流程并注册到第一AMF上。第一AMF为移动中继节点的MT功能服务。为了描述方便，以下简称第一AMF为移动中继节点服务。需要注意的是，在该注册过程中，第一AMF获知移动中继节点具有移动性，并将用于指示移动中继节点具有移动性的指示信息存在移动中继节点的上下文中。
S1102，第二AMF接收第一AMF发送的移动中继节点的上下文。
移动中继节点在从第一接入网设备移动到第二接入网设备的过程中，第一AMF能够根据第二接入网设备标识选择第二AMF，即发生了AMF重定向。其中，第一AMF是发生了AMF重定向之前服务移动中继节点的AMF。第二AMF是发生了AMF重定向之后，服务移动中继节点的AMF。
其中，在AMF重定向过程中，第一AMF将移动中继节点的上下文中存储的用于指示移动中继节点具有移动性的指示信息发送给第二AMF。第二AMF基于移动中继节点的上下文确定该移动中继节点具有移动性。
其中，该移动中继节点的上下文包含了用于指示移动中继节点具有移动性的指示信息。移动中继节点的上下文可以理解为是移动中继节点的MT功能的上下文。
S1103，第二AMF接收移动中继节点发送的注册请求消息。
可选地，在步骤S1103之前，该方法还包括：第二AMF根据移动中继节点的上下文在本地保存第七指示信息，该第七指示信息用于指示移动中继节点需要改变TAC，这样，第二AMF在接收移动中继节点发送的注册请求消息后，能够根据该第七指示信息和注册请求消息向移动中继节点发送注册接受消息，并在该消息中携带指示移动中继节点改变广播TAC的指示信息。
可选地，该第七指示信息可以是标志信息或者标志位。
S1104，移动中继节点接收第二AMF发送的第六指示信息。
其中，该第六指示信息用于指示移动中继节点改变广播的TAC。
可选地，第六指示信息可以承载在注册接受消息中，即移动中继节点接收第二AMF发送的注册接受消息，该注册接受消息包括该第六指示信息。
可选地，第二AMF根据注册请求消息和第七指示信息，向移动中继节点发送注册接受消息。
S1105，移动中继节点向UE广播第二TAC。
其中，移动中继节点获取第二TAC的方法，本申请不做限定。
作为一种实现方式，第二TAC可以是移动中继节点从OAM获取的，例如，当移动中继节点接收到第二指示信息之后，可以向OAM请求分配新的TAC。
作为另外一种实现方式，第二TAC也可以是预先配置在移动中继节点上的。例如，第一TAC和第二TAC都是预先配置在移动中继节点上的。
可选地，当第二TAC预先配置在移动中继节点上时，移动中继节点在接收到第六指示信息后，可以先去激活第一TAC，再激活第二TAC(即启动第二TAC)，然后向UE广播第二TAC。
其中，移动中继节点向UE广播第二TAC可以理解为：移动中继节点不再广播第一TAC，而是广播第二TAC。
本申请实施例中，在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，第二AMF在获知移动中继节点具有移动性以及发生了AMF重定向的情况下，第二AMF能够向移动中继节点发 送改变TAC的指示信息。通过这样的方式，能够使得移动中继节点更简单、有效的判断出是否需要更新广播的TAC，并且避免了暴露UE上下文的风险。
图12是本申请实施例提供的一种通信方法的流程性示意图，方法1200是对方法900的详细介绍，可以包括如下步骤。
S1201，MBSR的IAB-DU功能初始配置2个TAC，分别是TAC#1和TAC#2。
S1202，IAB-MT向AMF注册，AMF向宿主gNB#1提供IAB授权指示。
具体地，MBST的IAB-MT发起注册流程，注册到核心网中。在该过程中，IAB-MT向宿主gNB#1发送移动IAB指示信息，宿主gNB#1向AMF#1发送N2消息时，将该移动IAB指示信息发送至AMF#1。AMF#1根据移动IAB指示信息触发对IAB-MT的鉴权授权流程，如果鉴权流程成功，则AMF#1向宿主gNB#1发送鉴权成功指示信息。
其中，宿主gNB#1可以是上文所述的IAB宿主节点，该宿主gNB#1是接入网设备的一种。
S1203，IAB-DU向宿主gNB#1发送F1建立请求消息。
具体地，MBSR的IAB-DU功能发起F1建立流程，IAB-DU向gNB#1发送F1建立请求消息，用于激活MBSR的小区。
可选地，F1建立请求消息中可以包括：IAB-DU ID、该DU支持的TAC#1和移动IAB指示信息中的一种或多种，该F1建立请求消息可以是方法900中的第一请求消息。该移动IAB指示信息用于指示IAB节点具有移动性。该移动IAB指示信息可以是方法900中的第三指示信息。
本申请实施例中的移动IAB指示信息也可以称为MBSR指示信息。
S1204，宿主gNB#1向IAB-DU发送F1响应消息，至此F1建立流程结束。
S1205，宿主IAB存储IAB-MT和IAB-DU的绑定关系。
S1206，IAB-DU向UE发送广播消息，广播TAC#1。
S1207，UE通过MBSR注册到AMF中。
具体地，UE通过MBSR/移动IAB的小区正常注册到核心网中，此时，核心网给UE分配注册区域，该注册区域包括当前UE接入对应的跟踪区域标识(tracking area identity，TAI),即该TAI包括TAC#1。
S1208，MBSR/移动IAB发生移动，从宿主gNB#1移动到从宿主gNB#2，IAB-MT请求发起切换。
S1209，宿主gNB#1发起N2切换。
具体地，宿主gNB#1发起N2切换流程，在该流程中，AMF#1根据宿主gNB#2的标识选择AMF#2，触发AMF重定向。
S1210，AMF重定向。
S1211，AMF#1向宿主gNB#1发送切换指令，在该指令中携带AMF重定向指示。该切换指令可以是方法900中的切换命令消息或第一指示信息。
宿主gNB#1在收到AMF重定向指示后，可以通过两种方式触发IAB-DU改变广播中的TAC。一种方法是依次进行步骤S1212、S1213、S1215。另外一种方式是依次执行S1214和S1215。
S1212，宿主gNB#1向IAB-MT发送切换指令，该切换命令中携带AMF重定向指示。
S1213，IAB-MT向IAB-DU发送TAC改变指示信息。
其中，该TAC改变指示信息可以是方法900中的第二指示信息。
S1214，宿主gNB#1向IAB-DU发送配置更新消息。
具体地，宿主gNB#1通过F1接口直接和IAB-DU交互，发送F1配置更新消息，在该配置更新消息中携带TAC改变指示信息。该TAC改变指示信息可以是方法900中的第二指示信息。
S1215，IAB-DU根据该TAC改变指示信息，激活TAC#2。
S1216，IAB-DU向宿主gNB#2发送F1建立请求消息，用于激活MBSR的小区。
可选地，F1建立请求消息中可以包括：IAB-DU ID、支持该DU的TAC#2和移动IAB指示信息中的一种或多种。
S1217，宿主gNB#2向IAB-DU发送F1建立响应消息。
S1218，IAB-DU向UE发送广播消息，广播TAC#2。
S1219，UE监听广播消息，并判断当前的TAI(包括TAC#2)不属于网络侧分配的注册区域， 发起移动注册更新流程。
S1220，UE进行移动注册更新。
本申请实施例中，宿主gNB#1能够存储IAB-DU和IAB-CU的绑定关系，并根据该绑定关系，在获知了AMF发生了重定向后，能够向IAB-DU发送TAC改变指示信息，从而使得IAB广播的TAC发生改变，通过这样的方式，能够更简单、有效的判断出IAB节点是否需要更新广播的TAC。
需要注意的是，本申请实施例中，MBSR获取TAC的方法，本申请不做限定。图12中是以TAC#1和TAC#2都是预先配置在移动中继节点上的方法举例说明，作为另外一种实现方式，TAC#1和TAC#2也可以是移动中继节点从OAM获取的，例如，在步骤S1201中，IAB-DU功能初始从OAM获取TAC#1和TAC#2。或者，在步骤S1201中，IAB-DU功能从OAM先获取TAC#1。当MBSR接收到了TAC改变指示信息之后，IAB-DU功能再从OAM获取TAC#2。
图13是本申请实施例提供的另一种通信方法的流程性示意图，方法1300是对方法1000的详细介绍，方法1300可以包括如下步骤。
S1301，MBSR的IAB-DU功能初始配置2个TAC，分别是TAC#1和TAC#2。
S1302，IAB-MT向AMF注册，AMF向宿主gNB#1提供IAB授权指示。
具体地，MBST的IAB-MT发起注册流程，注册到核心网中。在该过程中，IAB-MT向宿主gNB#1发送移动IAB指示信息，宿主gNB#1向AMF#1发送N2消息时，将该移动IAB指示信息发送至AMF#1。AMF#1根据移动IAB指示信息触发对IAB-MT的鉴权授权流程，如果鉴权流程成功，则AMF#1向宿主gNB#1发送鉴权成功指示信息。
S1303，IAB-DU向宿主gNB#1发送F1建立请求消息。
具体地，MBSR的IAB-DU功能发起F1建立流程，IAB-DU向gNB#1发送F1建立请求消息，用于激活MBSR的小区。
可选地，F1建立请求消息中可以包括：IAB-DU ID、该DU支持的TAC#1和IAB移动指示信息中的一种或多种。该IAB移动指示信息用于指示该IAB节点具有移动性。
本申请实施例中的移动IAB指示信息也可以称为MBSR指示信息。
S1304，宿主gNB#1向IAB-DU发送F1响应消息，至此F1建立流程结束。
S1305，IAB-DU向UE发送广播消息，广播TAC#1。
S1306，UE通过MBSR注册到AMF中。
具体地，UE通过MBSR/移动IAB的小区正常注册到核心网中，此时，核心网给UE分配注册区域，该注册区域包括当前UE接入对应的TAI,即该TAI包括TAC#1。
S1307，MBSR/移动IAB发生移动，从宿主gNB#1移动到从宿主gNB#2，IAB-MT请求发起切换。
S1308，宿主gNB#1发起N2切换。
S1309，宿主gNB#1向AMF#1发送切换请求消息，该切换请求消息中包括宿主gNB#2的标识信息，AMF#1可以根据宿主gNB#2的标识信息选择AMF#2，触发AMF重定向。其中，AMF#1在在重定向的过程中可以将IAB-MT的上下文传递给AMF#2，该IAB-MT的上下文可以包括移动IAB指示信息。该移动IAB指示信息用于指示该IAB节点具有移动性。
S1310，AMF重定向。
S1311，AMF#2向宿主gNB#2发送切换请求消息，在该切换请求消息中携带AMF重定向指示和移动IAB指示信息。
其中，该移动IAB指示信息可以是方法1000中的第四指示信息，该AMF重定向指示可以是方法1000中的第五指示信息。
S1312，宿主gNB#2获知该MT是移动IAB，且本次切换发生了重定向后，能够在本地设置标志位，该标志位用于指示与该MT功能关联的DU需要改变广播的TAC。
其中，该标志位可以是方法1000中的第七指示信息。
S1313，AMF#1向gNB#1发送切换命令。
S1314，IAB-DU向宿主gNB#2发送F1建立请求消息，用于激活MBSR的小区。
可选地，F1建立请求消息中可以包括：IAB-DU ID、该DU支持的TAC#1和移动IAB指示信息中的一种或多种。
其中，该F1建立请求消息可以是方法1000中的第二请求消息。
S1315，宿主gNB#2根据本地设置的标志位，确定该IAB-DU需要改变TAC。
S1316，宿主gNB#2向IAB-DU发送F1建立响应消息，该F1建立响应消息中包括TAC改变指示。
其中，该TAC改变指示可以是方法1000中的第六指示信息。
S1317，IAB-DU获知广播的TAC需要发生改变，因此激活TAC#2，并向宿主gNB#2上报TAC#2进行配置更新。
S1318，IAB-DU向UE发送广播消息，广播TAC#2。
S1319，UE监听广播消息，并判断当前的TAI(包括TAC#2)不属于网络侧分配的注册区域，发起移动注册更新流程。
S1320，UE进行移动注册更新。
本申请实施例中，宿主gNB#2在获知了AMF发生了重定向以及IAB具有移动性后，能够在本地设置标志位，在接收到IAB-DU发送的建立请求消息后，宿主gNB#2能够根据该标志位确定该IAB-DU需要改变广播的TAC，并向其发送改变TAC的指示。通过这样的方式，能够更简单、有效的判断出IAB节点是否需要更新广播的TAC。
需要注意的是，本申请实施例中，MBSR获取TAC的方法，本申请不做限定。图13中是以TAC#1和TAC#2都是预先配置在移动中继节点上的方法举例说明，作为另外一种实现方式，TAC#1和TAC#2也可以是移动中继节点从OAM获取的，例如，在步骤S1301中，IAB-DU功能初始从OAM获取TAC#1和TAC#2。或者，在步骤S1301中，IAB-DU功能从OAM先获取TAC#1。当MBSR接收到了TAC改变指示信息之后，IAB-DU功能再从OAM获取TAC#2。
图14是本申请实施例提供的再一种通信方法的流程性示意图，方法1400是对方法1100的详细介绍，方法1400可以包括如下步骤。
S1401，MBSR的IAB-DU功能初始配置2个TAC，分别是TAC#1和TAC#2。
S1402，IAB-MT向AMF注册，AMF向宿主gNB#1提供IAB授权指示。
具体地，MBST的IAB-MT发起注册流程，注册到核心网中。在该过程中，IAB-MT向宿主gNB#1发送移动IAB指示信息，宿主gNB#1向AMF#1发送N2消息时，将该移动IAB指示信息发送至AMF#1。AMF#1根据移动IAB指示信息触发对IAB-MT的鉴权授权流程，如果鉴权流程成功，则AMF#1向宿主gNB#1发送鉴权成功指示信息。
在该步骤中，核心网可以获知该MBSR是移动IAB。
S1403，IAB-DU向宿主gNB#1发送F1建立请求消息。
具体地，MBSR的IAB-DU功能发起F1建立流程，IAB-DU向gNB#1发送F1建立请求消息，用于激活MBSR的小区。
可选地，F1建立请求消息中可以包括：IAB-DU ID、该DU支持的TAC#1和移动IAB指示信息中的一种或多种。该IAB移动指示信息用于指示该IAB节点具有移动性。
本申请实施例中的移动IAB指示信息也可以称为MBSR指示信息。
S1404，宿主gNB#1向IAB-DU发送F1响应消息，至此F1建立流程结束。
S1405，IAB-DU向UE发送广播消息，广播TAC#1。
S1406，UE通过MBSR注册到AMF中。
具体地，UE通过MBSR/移动IAB的小区正常注册到核心网中，此时，核心网给UE分配注册区域，该注册区域包括当前UE接入对应的TAI,即该TAI包括TAC#1。
S1407，MBSR/移动IAB发生移动，从宿主gNB#1移动到从宿主gNB#2，IAB-MT请求发起切换。
S1408，宿主gNB#1发起N2切换。
S1409，AFM重定向。
具体地，宿主gNB#1向AMF#1发送切换请求消息，该切换请求消息中包括宿主gNB#2的标识信息，AMF#1可以根据宿主gNB#2的标识信息选择AMF#2，触发AMF重定向。其中，AMF#1在在重定向的过程中可以将IAB-MT的上下文传递给AMF#2，该IAB-MT的上下文可以包括移动IAB指示信息，即指示该MBSR具有移动性。
S1410，AMF#2获知该MT是移动IAB，且本次切换发生了重定向后，能够在本地设置标志位，该标志位用于指示与该MT功能关联的DU需要改变广播的TAC。
其中，该标志位可以是方法1400中的第七指示信息。
S1411，IAB-MT在切换完成后发起移动注册更新流程。
S1412，IAB-MT向AMF#2发送注册请求消息。
S1413，AMF#2根据本地设置的标志位，确定该IAB-DU需要改变TAC。
S1414，AMF#2向IAB-MT发送注册接受消息。
其中，该注册接受消息中可以携带TAC改变指示，该TAC改变指示可以是方法1100中的第六指示信息。
S1415，IAB-MT向IAB-DU发送TAC改变指示。
S1416，IAB-DU根据TAC改变指示激活TAC#2。
S1417，IAB-DU向宿主gNB#2发送F1建立请求消息。
S1418，宿主gNB#2向IAB-DU发送F1建立响应消息。
S1419，IAB-DU向UE发送广播消息，广播TAC#2。
S1420，UE监听广播消息，并判断当前的TAI(包括TAC#2)不属于网络侧分配的注册区域，发起移动注册更新流程。
S1421，UE进行移动注册更新。
本申请实施例中，AMF#2通过IAB-MT的上下文获知IAB具有移动性以及AMF发生了重定向后，能够在本地设置标志位，在接收到IAB-MT发送的注册请求消息后，宿主AMF#2能够根据该标志位确定该与IAB-MT关联的IAB-DU需要改变广播的TAC，并向IAB-MT发送改变TAC的指示。通过这样的方式，能够更简单、有效的判断出IAB节点是否需要更新广播的TAC。
需要注意的是，本申请实施例中，MBSR获取TAC的方法，本申请不做限定。图14中是以TAC#1和TAC#2都是预先配置在移动中继节点上的方法举例说明，作为另外一种实现方式，TAC#1和TAC#2也可以是移动中继节点从OAM获取的，例如，在步骤S1401中，IAB-DU功能初始从OAM获取TAC#1和TAC#2。或者，在步骤S1401中，IAB-DU功能从OAM先获取TAC#1。当MBSR接收到了TAC改变指示信息之后，IAB-DU功能再从OAM获取TAC#2。
以上，结合图9至图14详细说明了本申请实施例提供的通信方法。以下，结合图15至图17详细说明本申请实施例提供的通信装置。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，这里不再赘述。
图15是本申请实施例提供的装置1500的示意性框图。
该装置1500包括收发单元1510、储存单元1520和处理单元1530。收发单元1510可以实现相应的通信功能，收发单元1510还可以称为通信接口或通信单元。存储单元1520可以用于存储指令和/或数据，处理单元1530用于进行数据处理。处理单元1530可以读取存储单元中的指令和/或数据，以使得装置实现前述方法实施例。
作为一种设计，该装置1500用于执行上文方法实施例中第一接入网设备所执行的动作。
一种可能的实现方式，提供了一种通信装置1500，该装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元1510，用于在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，接收第一AMF发送的第一指示信息，所述第一指示信息用于指示服务所述移动中继节点的AMF发生了重定向；所述收发单元1510，还用于根据所述第一指示信息，向所述移动中继节点发送第二指示信息，所述第二指示信息用于指示所述移动中继节点改变广播的TAC。
一种可能的实现方式，所述收发单元1510，具体用于接收第一AMF发送的切换命令消息，所述切换命令消息包括所述第一指示信息。
一种可能的实现方式，所述收发单元1510，还用于接收所述移动中继节点发送的第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
一种可能的实现方式，所述收发单元1510，具体用于根据所述第一指示信息和所述第三指示信息，向所述移动中继节点发送第二指示信息。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在 此不再赘述。
还应理解，上文实施例中的收发单元1510可以由收发器或收发器相关电路实现。存储单元1520可以通过至少一个存储器实现。处理单元1530可以由至少一个处理器或处理器相关电路实现。
作为一种设计，该装置1500用于执行上文方法实施例中第二接入网设备所执行的动作。
一种可能的实现方式中，提供了一种通信装置1500，该装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元1510，用于在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，接收第二AMF发送的第四指示信息和第五指示信息，所述第四指示信息用于指示所述移动中继节点具有移动性，所述第五指示信息用于指示服务所述移动中继节点的AMF发生了重定向；所述收发单元1510，还用于根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
一种可能的实现方式中，所述装置还包括处理单元1530，所述处理单元1530，用于根据所述第四指示信息和所述第五指示信息在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；所述收发单元1510，还用于接收所述移动中继节点发送的第二请求消息，所述第二请求用于建立所述第二接入网设备和所述移动中继节点之间的链接；所述收发单元1510，具体用于根据所述第二请求消息和所述第七指示信息，向所述移动中继节点发送第二响应消息，所述第二响应消息包括所述第六指示信息。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，上文实施例中的收发单元1510可以由收发器或收发器相关电路实现。存储单元1520可以通过至少一个存储器实现。处理单元1530可以由至少一个处理器或处理器相关电路实现。
作为一种设计，该装置1500用于执行上文方法实施例中第二AMF所执行的动作。
一种可能的实现方式中，提供了一种通信装置1500，该装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元1510，用于接收第一AMF发送的移动中继节点的上下文，所述移动中继节点的上下文用于指示所述移动中继节点具有移动性；所述收发单元1510，还用于根据所述移动中继节点的上下文，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
一种可能的实现方式中，所述收发单元1510，还用于接收所述移动中继发送的注册请求消息；所述收发单元1510，还用于根据所述移动中继节点的上下文以及所述注册请求消息，向所述移动中继节点发送注册接受消息，所述注册接受消息包括所述第六指示信息。
一种可能的实现方式中，所述装置还包括处理单元1530；所述处理单元1530，用于在根据所述移动中继节点的上下文本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；所述收发单元1510，具体用于根据所述注册请求消息和所述第七指示信息，向所述移动中继节点发送所述注册接受消息。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，上文实施例中的收发单元1510可以由收发器或收发器相关电路实现。存储单元1520可以通过至少一个存储器实现。处理单元1530可以由至少一个处理器或处理器相关电路实现。
作为一种设计，该装置1500用于执行上文方法实施例中移动中继节点所执行的动作。
一种可能的实现方式中，提供了一种通信装置1500，所述装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：收发单元1510，用于广播第一TAC；所述移动中继节点从第一接入网设备移动到第二接入网设备；所述收发单元1510，还用于接收第一设备发送的第二指示信息或第六指示信息，所述第二指示信息或所述第六指示信息用于指示所述移动中继节点改变的TAC；所述收发单元1510，还用于所述根据第二指示信息或所述第六指示信息广播第二TAC。
一种可能的实现方式中，所述第一设备为第一接入网设备、第二接入网设备，或者第二AMF中的任一种。
一种可能的实现方式中，所述第一设备为所述第一接入网设备，所述收发单元1510，具体用于接收第一接入网设备发送的切换命令消息或者F1配置更新消息，所述切换命令消息或所述F1配置更新 消息包括所述第二指示信息。
一种可能的实现方式中，所述收发单元1510，还用于向所述第一接入网设备发送第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
一种可能的实现方式中，所述第一设备为所述第二接入网设备，所述收发单元1510，还用于向所述第二接入网设备发送F1建立请求消息，所述F1建立请求消息用于建立所述移动中继节点和所述第二接入网之间的链接；所述收发单元1510，具体用于接收第二接入网设备发送的F1建立响应消息，所述F1建立响应消息包括所述第六指示信息。
一种可能的实现方式中，所述第一设备为第二AMF，所述收发单元1510，还用于向第二AMF发送注册请求消息；所述收发单元1510，具体用于接收第二AMF发送注册接受消息，所述注册接受消息包括所述第六指示信息。
一种可能的实现方式中，所述移动中继节点为移动无线接入链路和无线回传链路IAB节点，或者移动基站中继MBSR节点，所述移动中继节点包括：分布式单元DU和移动终端功能实体MT
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，上文实施例中的收发单元1510可以由收发器或收发器相关电路实现。存储单元1520可以通过至少一个存储器实现。处理单元1530可以由至少一个处理器或处理器相关电路实现。
图16是根据本申请实施例提供的通信装置的另一示意性框图。
如图16所示，本申请实施例还提供一种装置1600。该装置1600包括处理器1610，处理器1610与存储器1620耦合，存储器1620用于存储计算机程序或指令和/或数据，处理器1610用于执行存储器1620存储的计算机程序或指令和/或数据，使得上文方法实施例中的方法被执行。
可选地，该装置1600包括的处理器1610为一个或多个。
可选地，该装置1600包括的存储器1620可以为一个或多个。
可选地，该存储器1620可以与该处理器1610集成在一起，或者分离设置。
可选地，如图16所示，该装置1600还可以包括收发器1630，收发器1630用于信号的接收和/或发送。例如，处理器1610用于控制收发器1630进行信号的接收和/或发送。
作为一种方案，该装置1600用于实现上文方法实施例中由第一接入网设备、第二接入网设备、第二AMF或移动中继节点执行的操作。
本申请实施例还提供一种装置1700，该装置1700可以是网络设备也可以是芯片。该装置1700可以用于执行上述方法实施例中由网络设备(如上述各个网元)所执行的操作。
图17示出了一种简化的结构示意图。装置1700包括1710部分以及1720部分。1710部分主要用于射频信号的收发以及射频信号与基带信号的转换；1720部分主要用于基带处理，对基站进行控制等。1710部分通常可以称为收发单元、收发机、收发电路、或者收发器等。1720部分通常是基站的控制中心，通常可以称为处理单元，用于控制基站执行上述方法实施例中接收端设备侧的处理操作。
1710部分的收发单元，也可以称为收发机或收发器等，其包括天线和射频电路，其中射频电路主要用于进行射频处理。可选地，可以将1710部分中用于实现接收功能的器件视为接收单元，将用于实现发送功能的器件视为发送单元，即1710部分包括接收单元和发送单元。接收单元也可以称为接收机、接收器、或接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
1720部分可以包括一个或多个单板，每个单板可以包括一个或多个处理器和一个或多个存储器。处理器用于读取和执行存储器中的程序以实现基带处理功能以及对基站的控制。若存在多个单板，各个单板之间可以互联以增强处理能力。作为一种可选的实施方式，也可以是多个单板共用一个或多个处理器，或者是多个单板共用一个或多个存储器，或者是多个单板同时共用一个或多个处理器。
应理解，图17仅为示例而非限定，上述包括收发单元和处理单元的网络设备可以不依赖于图17所示的结构。
当该装置1700为芯片时，该芯片包括收发单元和处理单元。其中，收发单元可以是输入输出电路、通信接口；处理单元为该芯片上集成的处理器或者微处理器或者集成电路。当然装置1700还可以为一个芯片系统或处理系统，使得安装该装置1700的设备可以实现本申请实施例的方法和功能。例如，处理单元1720可以为芯片系统或处理系统中的处理电路，实现对安装了该芯片系统或处理系统的设备的 控制，还可以耦合链接存储单元，调用存储单元中的指令，使得设备可以实现本申请实施例的方法和功能，收发单元1710，可以为芯片系统或处理系统中的输入输出电路，将芯片系统处理好的信息输出，或将待处理的数据或信令信息输入芯片系统进行处理。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述方法实施例中由第一接入网设备、第二接入网设备、第二AMF或移动中继节点执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法实施例中由第一接入网设备、第二接入网设备、第二AMF或移动中继节点执行的方法。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被计算机执行时使得该计算机实现上述方法实施例中由第一接入网设备、第二接入网设备、第二AMF或移动中继节点执行的方法。
上述提供的任一种装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器和/或非易失性存储器。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。例如，RAM可以用作外部高速缓存。作为示例而非限定，RAM可以包括如下多种形式：静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)可以集成在处理器中。
还需要说明的是，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的保护范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。此外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元实现本申请提供的方案。
另外，在本申请各个实施例中的各功能单元可以集成在一个单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机 指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。例如，所述计算机可以是个人计算机，服务器，或者网络设备等。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD)等。例如，前述的可用介质可以包括但不限于：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本申请的各实施例中，为了方便的描述，采用了第一请求消息，第二请求消息以及其他各种消息的名称。然而，这些消息仅仅是以举例方式说明需要携带的内容或者实现的功能，消息的具体名称并不对本申请的做出限定，例如：还可以是请求消息，响应消息等。这些消息可以是具体的一些消息，可以是消息中的某些字段。这些消息还可以代表各种服务化操作。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (35)

  1. 一种通信方法，其特征在于，所述方法应用于包括移动中继节点和至少两个接入网设备的通信系统，所述方法包括：
    在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，所述第一接入网设备接收第一接入和移动管理功能AMF发送的第一指示信息，所述第一指示信息用于指示服务所述移动中继节点的AMF发生了重定向；
    所述第一接入网设备根据所述第一指示信息，向所述移动中继节点发送第二指示信息，所述第二指示信息用于指示所述移动中继节点改变广播的跟踪区域码TAC。
  2. 如权利要求1所述的方法，其特征在于，所述第一接入网设备接收第一AMF发送的第一指示信息，包括：
    所述第一接入网设备接收第一AMF发送的切换命令消息，所述切换命令消息包括所述第一指示信息。
  3. 如权利要求1或2所述的方法，其特征在于，在所述第一接入网设备所述接收第一AMF发送的第一指示信息之前，所述方法还包括：
    所述第一接入网设备接收所述移动中继节点发送的第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
  4. 如权利要求3所述的方法，其特征在于，所述第一接入网设备根据所述第一指示信息，向所述移动中继节点发送第二指示信息，包括：
    所述第一接入网设备根据所述第一指示信息和所述第三指示信息，向所述移动中继节点发送第二指示信息。
  5. 一种通信方法，其特征在于，所述方法应用于包括移动中继节点和至少两个接入网设备的通信系统，所述方法包括：
    在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，所述第二接入网设备接收第二AMF发送的第四指示信息和第五指示信息，所述第四指示信息用于指示所述移动中继节点具有移动性，所述第五指示信息用于指示服务所述移动中继节点的AMF发生了重定向；
    所述第二接入网设备根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
  6. 如权利要求5所述的方法，其特征在于，在所述第二接入网设备根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息之前，所述方法还包括：
    所述第二接入网设备根据所述第四指示信息和所述第五指示信息在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；
    所述第二接入网设备接收所述移动中继节点发送的第二请求消息，所述第二请求消息用于建立所述第二接入网设备和所述移动中继节点之间的链接；
    所述第二接入网设备根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息，包括：
    所述第二接入网设备根据所述第二请求消息和所述第七指示信息，向所述移动中继节点发送所述第二响应消息，所述第二响应消息包括所述第六指示信息。
  7. 一种通信方法，其特征在于，所述方法应用于包括移动中继节点和至少两个接入网设备的通信系统，所述方法包括：
    第二AMF接收第一AMF发送的所述移动中继节点的上下文，所述移动中继节点的上下文用于指示所述移动中继节点具有移动性；
    所述第二AMF根据所述移动中继节点的上下文，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
  8. 如权利要求7所述的方法，其特征在于，所述第二AMF根据所述移动中继节点的上下文，向所述移动中继节点发送第六指示信息，包括：
    所述第二AMF接收所述移动中继节点发送的注册请求消息；
    所述第二AMF根据所述移动中继节点的上下文以及所述注册请求消息，向所述移动中继发送注册接受消息，所述注册接受消息包括所述第六指示信息。
  9. 如权利要求8所述的方法，其特征在于，在所述第二AMF接收所述移动中继发送的注册请求消息之前，所述方法还包括：
    所述第二AMF根据所述移动中继节点的上下文在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；
    所述第二AMF根据所述移动中继节点的上下文以及所述注册请求消息，向所述移动中继发送注册接受消息，包括：
    所述第二AMF根据所述注册请求消息和所述第七指示信息，向所述移动中继节点发送所述注册接受消息。
  10. 一种通信方法，其特征在于，所述方法应用于包括移动中继节点和至少两个接入网设备的通信系统，所述方法包括：
    所述移动中继节点广播第一TAC；
    所述移动中继节点从第一接入网设备移动到第二接入网设备；
    所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，所述第二指示信息或所述第六指示信息用于指示所述移动中继节点改变的TAC；
    所述移动中继节点根据所述第二指示信息或所述第六指示信息广播第二TAC。
  11. 如权利要求10所述的方法，其特征在于，所述第一设备为第一接入网设备、第二接入网设备，或者第二AMF中的任一种。
  12. 如权利要求11所述的方法，其特征在于，所述第一设备为所述第一接入网设备，所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，包括：
    所述移动中继节点接收第一接入网设备发送的切换命令消息或者F1配置更新消息，所述切换命令消息或所述F1配置更新消息包括所述第二指示信息。
  13. 如权利要求12所述的方法，其特征在于，在所述移动中继节点接收第一接入网设备发送的切换命令消息或者F1配置更新消息之前，所述方法还包括：
    所述移动中继节点向所述第一接入网设备发送第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
  14. 如权利要求11所述的方法，其特征在于，所述第一设备为所述第二接入网设备，所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息之前，所述方法还包括：
    所述移动中继节点向所述第二接入网设备发送第二请求消息，所述第二请求消息用于建立所述移动中继节点和所述第二接入网之间的链接；
    所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，包括：
    所述移动中继节点接收第二接入网设备发送的第二响应消息，所述第二响应消息包括所述第六指示信息。
  15. 如权利要求11所述的方法，其特征在于，所述第一设备为第二AMF，所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息之前，所述方法还包括：
    所述移动中继节点向第二AMF发送注册请求消息；
    所述移动中继节点接收第一设备发送的第二指示信息或第六指示信息，包括：
    所述移动中继节点接收第二AMF发送的注册接受消息，所述注册接受消息包括所述第六指示信息。
  16. 如权利要求1至15任一项所述的方法，其特征在于，所述移动中继节点为移动无线接入链路和无线回传链路IAB节点，或者移动基站中继MBSR节点，所述移动中继节点包括：分布式单元DU和移动终端功能实体MT。
  17. 一种通信装置，其特征在于，所述装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：
    收发单元，用于在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，接收第一 AMF发送的第一指示信息，所述第一指示信息用于指示服务所述移动中继节点的AMF发生了重定向；
    所述收发单元，还用于根据所述第一指示信息，向所述移动中继节点发送第二指示信息，所述第二指示信息用于指示所述移动中继节点改变广播的TAC。
  18. 如权利要求17所述的装置，其特征在于，
    所述收发单元，具体用于接收第一AMF发送的切换命令消息，所述切换命令消息包括所述第一指示信息。
  19. 如权利要求17或18所述的装置，其特征在于，
    所述收发单元，还用于接收所述移动中继节点发送的第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
  20. 如权利要求19所述的方法，其特征在于，
    所述收发单元，具体用于根据所述第一指示信息和所述第三指示信息，向所述移动中继节点发送第二指示信息。
  21. 一种通信装置，其特征在于，所述装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：
    收发单元，用于在移动中继节点从第一接入网设备移动到第二接入网设备的过程中，接收第二AMF发送的第四指示信息和第五指示信息，所述第四指示信息用于指示所述移动中继节点具有移动性，所述第五指示信息用于指示服务所述移动中继节点的AMF发生了重定向；
    所述收发单元，还用于根据所述第四指示信息和所述第五指示信息，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
  22. 如权利要求21所述的装置，其特征在于，所述装置还包括处理单元，
    所述处理单元，用于根据所述第四指示信息和所述第五指示信息在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；
    所述收发单元，还用于接收所述移动中继节点发送的第二请求消息，所述第二请求用于建立所述第二接入网设备和所述移动中继节点之间的链接；
    所述收发单元，具体用于根据所述第二请求消息和所述第七指示信息，向所述移动中继节点发送第二响应消息，所述第二响应消息包括所述第六指示信息。
  23. 一种通信装置，其特征在于，所述装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：
    收发单元，用于接收第一AMF发送的所述移动中继节点的上下文，所述移动中继节点的上下文用于指示所述移动中继节点具有移动性；
    所述收发单元，还用于根据所述移动中继节点的上下文，向所述移动中继节点发送第六指示信息，所述第六指示信息用于指示所述移动中继节点改变广播的TAC。
  24. 如权利要求23所述的装置，其特征在于，
    所述收发单元，还用于接收所述移动中继节点发送的注册请求消息；
    所述收发单元，还用于根据所述移动中继节点的上下文以及所述注册请求消息，向所述移动中继发送注册接受消息，所述注册接受消息包括所述第六指示信息。
  25. 如权利要求24所述的装置，其特征在于，所述装置还包括处理单元；
    所述处理单元，用于根据所述移动中继节点的上下文在本地保存第七指示信息，所述第七指示信息用于指示所述移动中继节点需要改变TAC；
    所述收发单元，具体用于根据所述注册请求消息和所述第七指示信息，向所述移动中继节点发送所述注册接受消息。
  26. 一种通信装置，其特征在于，所述装置应用于包括移动中继节点和至少两个接入网设备的通信系统，所述装置包括：
    收发单元，用于广播第一TAC；
    所述移动中继节点从第一接入网设备移动到第二接入网设备；
    所述收发单元，还用于接收第一设备发送的第二指示信息或第六指示信息，所述第二指示信息或所述第六指示信息用于指示所述移动中继节点改变的TAC；
    所述收发单元，还用于所述根据第二指示信息或所述第六指示信息广播第二TAC。
  27. 如权利要求26所述的装置，其特征在于，所述第一设备为第一接入网设备、第二接入网设备，或者第二AMF中的任一种。
  28. 如权利要求27所述的装置，其特征在于，所述第一设备为所述第一接入网设备，
    所述收发单元，具体用于接收第一接入网设备发送的切换命令消息或者F1配置更新消息，所述切换命令消息或所述F1配置更新消息包括所述第二指示信息。
  29. 如权利要求28所述的装置，其特征在于，
    所述收发单元，还用于向所述第一接入网设备发送第一请求消息，所述第一请求消息包括：第三指示信息，所述第三指示信息用于指示所述移动中继节点具有移动性。
  30. 如权利要求27所述的装置，其特征在于，所述第一设备为所述第二接入网设备，
    所述收发单元，还用于向所述第二接入网设备发送第二请求消息，所述第二请求消息用于建立所述移动中继节点和所述第二接入网之间的链接；
    所述收发单元，具体用于接收第二接入网设备发送的第二响应消息，所述第二响应消息包括所述第六指示信息。
  31. 如权利要求27所述的装置，其特征在于，所述第一设备为第二AMF，
    所述收发单元，还用于向第二AMF发送注册请求消息；
    所述收发单元，具体用于接收第二AMF发送的注册接受消息，所述注册接受消息包括所述第六指示信息。
  32. 如权利要求17至31所述的装置，其特征在于，所述移动中继节点为移动无线接入链路和无线回传链路IAB节点，或者移动基站中继MBSR节点，所述移动中继节点包括：分布式单元DU和移动终端功能实体MT。
  33. 一种通信装置，其特征在于，包括：处理器和存储器，所述处理器与所述存储器耦合，用于读取并执行所述存储器中的指令，以执行如权利要求1至16中任一项所述的方法。
  34. 一种可读存储介质，其特征在于，所述计算机可读介质存储有程序代码，当所述计算机程序代码在计算机上运行时，使得所述计算机执行如权利要求1至16中任一项所述的方法。
  35. 一种通信系统，包括：
    权利要求17至20任一项所述的通信装置、权利要求21或22所述的通信装置和23至33任一项所述的通信装置。
PCT/CN2023/119381 2022-09-28 2023-09-18 通信方法、装置以及系统 WO2024067200A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211191762.5A CN117793816A (zh) 2022-09-28 2022-09-28 通信方法、装置以及系统
CN202211191762.5 2022-09-28

Publications (1)

Publication Number Publication Date
WO2024067200A1 true WO2024067200A1 (zh) 2024-04-04

Family

ID=90380311

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/119381 WO2024067200A1 (zh) 2022-09-28 2023-09-18 通信方法、装置以及系统

Country Status (2)

Country Link
CN (1) CN117793816A (zh)
WO (1) WO2024067200A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110446233A (zh) * 2018-05-04 2019-11-12 华为技术有限公司 切换方法、设备及系统
WO2021187933A1 (ko) * 2020-03-20 2021-09-23 주식회사 케이티 릴레이 노드를 제어하는 방법 및 그 장치
CN113747521A (zh) * 2020-05-29 2021-12-03 维沃移动通信有限公司 网络切换方法、装置、通信设备及系统
US20220264383A1 (en) * 2019-08-06 2022-08-18 Telefonaktiebolaget Lm Ericsson (Publ) Implicit Indication of Centralized Unit (CU) Integrated Access Backhaul (IAB) Capability
CN114980226A (zh) * 2018-06-26 2022-08-30 华为技术有限公司 重定向的方法、通信系统和通信装置
CN115119279A (zh) * 2021-03-23 2022-09-27 华为技术有限公司 一种接入控制方法及通信装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110446233A (zh) * 2018-05-04 2019-11-12 华为技术有限公司 切换方法、设备及系统
CN114980226A (zh) * 2018-06-26 2022-08-30 华为技术有限公司 重定向的方法、通信系统和通信装置
US20220264383A1 (en) * 2019-08-06 2022-08-18 Telefonaktiebolaget Lm Ericsson (Publ) Implicit Indication of Centralized Unit (CU) Integrated Access Backhaul (IAB) Capability
WO2021187933A1 (ko) * 2020-03-20 2021-09-23 주식회사 케이티 릴레이 노드를 제어하는 방법 및 그 장치
CN113747521A (zh) * 2020-05-29 2021-12-03 维沃移动通信有限公司 网络切换方法、装置、通信设备及系统
CN115119279A (zh) * 2021-03-23 2022-09-27 华为技术有限公司 一种接入控制方法及通信装置

Also Published As

Publication number Publication date
CN117793816A (zh) 2024-03-29

Similar Documents

Publication Publication Date Title
CN112637906B (zh) 寻呼的方法和装置
EP4090039A1 (en) Method and apparatus for transmitting multicast service
CN111586771A (zh) 网络节点选择方法及装置
WO2021136211A1 (zh) 授权结果的确定方法及装置
CN114143871B (zh) 网络连接方法、网络去连接方法及通信装置
EP3295714B1 (en) Mtc service management using nfv
EP4181588A1 (en) Method for terminal to access public and private networks and communication apparatus
EP4354770A1 (en) Method and apparatus for transmitting data
WO2022199451A1 (zh) 会话切换的方法和装置
CN114557031A (zh) 用于将非3gpp上的pdu会话移动到3gpp接入的方法
EP4181542A1 (en) Proximity service communication method, management network element, terminal device, and communication system
WO2022179434A1 (zh) 组播/广播业务的通信方法、装置及系统
WO2024067200A1 (zh) 通信方法、装置以及系统
KR20240060670A (ko) 통신 방법 및 장치
WO2021208784A1 (zh) 数据传输方法及通信装置
WO2023011871A1 (en) Apparatus, methods, and computer programs
CN116193415A (zh) 中继设备的选择方法、装置、设备及存储介质
WO2023133871A1 (zh) 通信方法和装置
WO2022170798A1 (zh) 确定策略的方法和通信装置
WO2022160183A1 (zh) 接入网络的方法和装置
WO2024074148A1 (zh) 通信方法、装置及系统
WO2023134516A1 (zh) 一种广播通信方法和装置
WO2022198466A1 (zh) 发现方法和终端
WO2023197772A1 (zh) 一种通信方法及相关装置
CN117641472A (zh) 一种通信方法和装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23870434

Country of ref document: EP

Kind code of ref document: A1