WO2021087924A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2021087924A1
WO2021087924A1 PCT/CN2019/116420 CN2019116420W WO2021087924A1 WO 2021087924 A1 WO2021087924 A1 WO 2021087924A1 CN 2019116420 W CN2019116420 W CN 2019116420W WO 2021087924 A1 WO2021087924 A1 WO 2021087924A1
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WIPO (PCT)
Prior art keywords
message
wireless access
access device
control plane
radio bearer
Prior art date
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PCT/CN2019/116420
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English (en)
French (fr)
Inventor
朱元萍
刘菁
戴明增
史玉龙
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
Priority to EP19951732.7A priority Critical patent/EP4040911A4/en
Priority to CN201980101984.3A priority patent/CN114631394A/zh
Priority to PCT/CN2019/116420 priority patent/WO2021087924A1/zh
Publication of WO2021087924A1 publication Critical patent/WO2021087924A1/zh
Priority to US17/738,445 priority patent/US20220264602A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/24—Interfaces between hierarchically similar devices between backbone network devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/14—Backbone network devices

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • the fifth-generation mobile communication system (5th-generation, 5G) introduced integrated access and backhaul (IAB) network technology, the access link and backhaul link in the IAB network (backhaul link) All adopt wireless transmission schemes to avoid fiber deployment, thereby reducing deployment costs and improving deployment flexibility.
  • IAB integrated access and backhaul
  • the IAB donor base station (IAB donor gNodeB, IAB DgNB) is connected to the core network (for example, the core network (5G core, 5GC) in the 5G system) through a wired link, and then increases between the IAB donor base station and the terminal
  • the integrated access and backhaul node (IAB node) provides wireless access services for the terminal through the access link (AL) of the IAB node, and through the backhaul link (
  • the backhaul link (BL) is connected to the IAB donor base station to transmit the service data of the terminal.
  • the radio bearer for example, data radio bearer (DRB) and/or signaling radio bearer (SRB)
  • DRB data radio bearer
  • SRB signaling radio bearer
  • LCH logical channel
  • F1 application layer protocol (F1 application protocol, F1AP) message on the F1 interface between the IAB node and the IAB donor base station is transmitted based on the backhaul link.
  • the IAB donor base station can also use the air interface of the long term evolution (LTE) system to transmit the F1AP message to the IAB node, but the above-mentioned method of transmitting the F1AP message through the LTE link cannot provide effective quality of service for the terminal’s business ( Quality of service, QoS) guarantee, that is, it is difficult to guarantee the QoS requirements of the terminal, so this method may cause discontinuity of terminal services.
  • LTE long term evolution
  • This application provides a communication method and device, which can provide QoS guarantee for the terminal and ensure the continuity of terminal services.
  • a communication method includes: under a network architecture in which both a first wireless access device and a second wireless access device are connected to the first wireless backhaul device, the first wireless access device starts from the first wireless access device. 2.
  • the wireless access device receives a first message, where the first message includes a first control plane message and first indication information. Then the first wireless access device determines the first radio bearer according to the first indication information. Then, the first wireless access device sends a second message including the first control plane message to the first wireless backhaul device through the first radio bearer.
  • the first wireless access device and the second wireless access device may be wireless access devices of different communication standards, for example, the first wireless access device is an eNB, and the second wireless access device is an IAB donor base station , The first wireless backhaul device is an IAB node, and the first control plane message may be a downlink F1AP message.
  • the eNB can determine the first radio bearer used to carry the downlink F1AP message according to the first indication information indicated by the IAB donor base station, so as to select different radio bearers for different downlink F1AP message types, so as to provide effective services for the terminal. QoS guarantee.
  • the first radio bearer is an SRB between the first wireless backhaul device and the first wireless access device.
  • the first indication information may be used to indicate the identity of the first radio bearer.
  • the IAB donor base station directly sends the first indication information for indicating the identity of the first radio bearer to the eNB, and the eNB can directly determine the first radio bearer according to the identity of the first radio bearer.
  • the IAB donor base station sends the first indication information to facilitate the eNB to quickly determine the first radio bearer corresponding to the F1AP message, and this method has low signaling overhead.
  • the first indication information may be used to indicate the first type of the first control plane message.
  • the second wireless access device also needs to receive a configuration message from the second wireless access device, and the configuration message includes the mapping relationship between the first type of the first control plane message and the first radio bearer. Therefore, the first wireless access device determines the first radio bearer corresponding to the first type of the first control plane message according to the configuration message and the first indication information.
  • the IAB donor base station sends the first indication information to facilitate the eNB to quickly determine the first radio bearer corresponding to the F1AP message.
  • a communication method includes: under a network architecture in which both a first wireless access device and a second wireless access device are connected to the first wireless backhaul device, the second wireless access device determines the first wireless access device And then send a first message including the first indication information to the first wireless access device, where the first indication information is used to determine the first message transmitted between the first wireless access device and the first wireless backhaul device
  • the first radio bearer corresponding to a control plane message.
  • the first wireless access device and the second wireless access device may be wireless access devices of different communication standards, for example, the first wireless access device is an eNB, and the second wireless access device is an IAB donor base station ,
  • the first wireless backhaul device is an IAB node, and the first control plane message may be a downlink F1AP message.
  • the IAB donor base station sends the first indication information to the eNB, and the eNB determines the first radio bearer used to carry the downlink F1AP message according to the first indication information, so as to select different radio bearers for different downlink F1AP message types, so as to provide services for the terminal Provide effective QoS guarantee.
  • the first radio bearer is an SRB between the first wireless backhaul device and the first wireless access device.
  • the first indication information may be used to indicate the identity of the first radio bearer.
  • the IAB donor base station directly sends the first indication information for indicating the identity of the first radio bearer to the eNB, and the eNB can directly determine the first radio bearer according to the identity of the first radio bearer.
  • the IAB donor base station sends the first indication information to facilitate the eNB to quickly determine the first radio bearer corresponding to the F1AP message, and this method has low signaling overhead.
  • the first indication information may be used to indicate the first type of the first control plane message.
  • the second wireless access device also needs to receive a configuration message from the second wireless access device, and the configuration message includes the mapping relationship between the first type of the first control plane message and the first radio bearer. Therefore, the first wireless access device determines the first radio bearer corresponding to the first type of the first control plane message according to the configuration message and the first indication information.
  • the IAB donor base station sends the first indication information to facilitate the eNB to quickly determine the first radio bearer corresponding to the F1AP message.
  • a communication method includes: under a network architecture in which both a first wireless access device and a second wireless access device are connected to the first wireless backhaul device, the first wireless backhaul device receives configuration
  • the configuration message includes the correspondence between the first radio bearer and the first type of the control plane message.
  • the first wireless backhaul device acquires the second control plane message, where the type of the second control plane message is the first type, and the first wireless backhaul device determines the one corresponding to the first type of the second control plane message according to the configuration message A first radio bearer; and then send a third message including a second control plane message to the first radio access device through the first radio bearer.
  • the first wireless access device and the second wireless access device may be wireless access devices of different communication standards, for example, the first wireless access device is an eNB, and the second wireless access device is an IAB donor base station ,
  • the first wireless backhaul device is an IAB node
  • the second control plane message may be an uplink F1AP message
  • the first radio bearer is an SRB between the first wireless backhaul device and the first wireless access device.
  • the IAB node can determine the first radio bearer used to carry the uplink F1AP message of the first type according to the mapping relationship in the configuration message sent by the IAB donor base station, so as to select different radio bearers for different uplink F1AP message types. Provide effective QoS guarantee for terminal services.
  • the first wireless backhaul device receives the configuration message from the second wireless access device.
  • the first wireless backhaul device receives the configuration message from the first wireless access device.
  • the configuration message in the first wireless access device may be obtained from the second access device.
  • the first wireless backhaul device may also receive a fifth message from the first wireless access network device, where the fifth message includes the mapping relationship between the first IP address and the first air interface.
  • the first wireless backhaul device obtains the second control plane message, it determines that the air interface corresponding to the first IP address in the second control plane message is the first air interface, and the first air interface is the first wireless backhaul device and the first air interface.
  • the air interface between the radio access network devices, and then the first wireless backhaul device determines the first radio bearer on the first air interface.
  • the first wireless device uses the mapping relationship in the configuration message to determine the first radio bearer.
  • a communication method includes: in a network architecture in which both the first wireless access device and the second wireless access device are connected to the first wireless backhaul device, the first wireless access device passes through the first wireless access device.
  • a radio bearer receives a third message including a second control plane message from the first wireless backhaul device, and then sends a fourth message including the second control plane message to the second radio access network device to facilitate the first radio access The device sends the second control plane message in the fourth message to the second wireless access device.
  • the first wireless access device and the second wireless access device may be wireless access devices of different communication standards, for example, the first wireless access device is an eNB, and the second wireless access device is an IAB donor base station ,
  • the first wireless backhaul device is an IAB node
  • the second control plane message may be an uplink F1AP message
  • the first radio bearer is an SRB between the first wireless backhaul device and the first wireless access device.
  • the IAB node can determine the first radio bearer used to carry the uplink F1AP message of the first type according to the mapping relationship in the configuration message sent by the IAB donor base station, so as to select different radio bearers for different uplink F1AP message types. Provide effective QoS guarantee for terminal services.
  • the first radio access network device before receiving the third message, sends a configuration message to the first wireless backhaul device, and the configuration message includes one of the radio bearer and the second control plane message of the first type.
  • the first wireless backhaul device may determine the first radio bearer according to the mapping relationship.
  • the first radio access network device may obtain the configuration message from the second radio access network device in advance.
  • a communication method includes: in a network architecture in which both the first wireless access device and the second wireless access device are connected to the first wireless backhaul device, the second wireless access network device generates A configuration message, where the configuration message includes the correspondence between the first radio bearer and the first type of control plane message, and then the second radio access network device sends this to the first wireless backhaul device or the first wireless access device Configuration message.
  • the first wireless backhaul device can determine the first radio bearer according to the mapping relationship in the configuration message to achieve Choose different radio bearers for different uplink F1AP message types, so as to provide effective QoS guarantee for terminal services.
  • the first wireless access device can forward the configuration message to the first wireless backhaul device, and the first wireless backhaul device can then forward the configuration message to the first wireless backhaul device.
  • the mapping relationship in the configuration message determines the first radio bearer, so as to select different radio bearers for different uplink F1AP message types, so as to provide effective QoS guarantee for terminal services.
  • a communication method comprising: a first node sending a broadcast message, where the broadcast message includes indication information, and the indication information is used to indicate that the first node can support the access of an IAB node.
  • the second node obtains indication information from the broadcast message, and determines that the first node supports the access of the IAB node.
  • the second section sends a notification message to the third node, where the notification message includes the indication information that the first node or the cell served by the first node supports IAB node access.
  • the third node determines that the first node is the secondary base station of the second node, or selects the cell served by the first node as the secondary cell of the second node.
  • the primary serving base station of the IAB node can select a secondary base station that supports IAB access for the IAB node to avoid the selected secondary base station from being unable to support the access of the IAB node, resulting in the IAB node being unable to use the secondary cell to provide the UE with a return. Transmission service.
  • an embodiment of the present application provides a communication device, the communication device includes a processor, the processor is coupled to a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to execute The above-mentioned first aspect or any one of the possible design methods of the first aspect.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver, which is used to support the communication device to send and/or receive information in the foregoing method.
  • the communication device may be the first wireless access device, or a device in the first wireless access device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system also It may include other circuit structures and/or discrete devices.
  • a communication device may be a first wireless access device, or a device in the first wireless access device, or a device that can be matched and used with the first wireless access device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in various aspects.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a transceiving module and a processing module, and the transceiving module and the processing module can perform the corresponding function in any of the design examples of the first aspect above. For the functions of the transceiving module and the processing module, refer to the first aspect. Record, no longer explain one by one here.
  • an embodiment of the present application provides a communication device, the communication device includes a processor, the processor is coupled with a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to execute The above-mentioned second aspect or any one of the possible design methods of the second aspect.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver, which is used to support the communication device to send and/or receive information in the foregoing method.
  • the communication device may be a second wireless access device, or a device in the second wireless access device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system also It may include other circuit structures and/or discrete devices.
  • a communication device may be a second wireless access device, or a device in the second wireless access device, or a device that can be matched and used with the second wireless access device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in various aspects.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a transceiving module and a processing module, and the transceiving module and the processing module can perform the corresponding function in any of the above-mentioned second aspect design examples.
  • the transceiving module and the processing module please refer to the second aspect. Record, no longer explain one by one here.
  • an embodiment of the present application provides a communication device.
  • the communication device includes a processor, and the processor is coupled to a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to perform Perform the above-mentioned third aspect or any one of the possible design methods in the third aspect.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver, which is used to support the communication device to send and/or receive information in the foregoing method.
  • the communication device may be the first wireless backhaul device, or a device in the first wireless backhaul device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system also It may include other circuit structures and/or discrete devices.
  • a communication device may be a first wireless backhaul device, or a device in the first wireless backhaul device, or a device that can be matched and used with the first wireless backhaul device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in various aspects.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a transceiving module and a processing module, and the transceiving module and the processing module can perform the corresponding function in any of the above-mentioned third aspect design examples.
  • the transceiving module and the processing module please refer to the third aspect. Record, no longer explain one by one here.
  • an embodiment of the present application provides a communication device, the communication device includes a processor, the processor is coupled to a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to execute Perform any of the possible design methods in the fourth aspect or the fourth aspect.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver, which is used to support the communication device to send and/or receive information in the foregoing method.
  • the communication device may be the first wireless access device, or a device in the first wireless access device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system also It may include other circuit structures and/or discrete devices.
  • a communication device may be a first wireless access device, or a device in the first wireless access device, or a device that can be matched and used with the first wireless access device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in various aspects.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a transceiving module and a processing module, and the transceiving module and the processing module can perform the corresponding function in any of the above-mentioned fourth aspect design examples.
  • the transceiving module and the processing module please refer to the fourth aspect. Record, no longer explain one by one here.
  • an embodiment of the present application provides a communication device, the communication device includes a processor, the processor is coupled to a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to execute Perform any of the above-mentioned fifth aspect or any of the possible design methods in the fifth aspect.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver, which is used to support the communication device to send and/or receive information in the foregoing method.
  • the communication device may be a second wireless access device, or a device in the second wireless access device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system also It may include other circuit structures and/or discrete devices.
  • a communication device may be a second wireless access device, or a device in the second wireless access device, or a device that can be matched and used with the second wireless access device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the fifth aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a transceiver module and a processing module, and the transceiver module and the processing module may perform the corresponding function in any of the above-mentioned fifth aspect design examples.
  • the transceiver module and the processing module please refer to the fifth aspect. Record, no longer explain one by one here.
  • an embodiment of the present application provides a communication device, the communication device includes a processor, and the processor is coupled to a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to execute Implement any one of the possible design methods in the sixth aspect or the sixth aspect described above.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver, which is used to support the communication device to send and/or receive information in the foregoing method.
  • the communication device may be a second node, or a device in the second node, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may also include other circuit structures and / Or discrete devices.
  • a communication device may be a second node, or a device in the second node, or a device that can be matched and used with the second node.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the fifth aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a transceiver module and a processing module, and the transceiver module and the processing module may perform the corresponding function in any of the above-mentioned sixth aspect design examples.
  • the transceiver module and the processing module please refer to the sixth aspect. Record, no longer explain one by one here.
  • an embodiment of the present application provides a device that includes a processor, and is configured to implement the method described in the first aspect or the method described in the second aspect.
  • the device may also include a memory for storing instructions and/or data.
  • the memory is coupled with the processor, and when the processor executes the program instructions stored in the memory, the method described in the first aspect may be implemented, or the method described in the second aspect may be implemented.
  • the device may also include a communication interface, which is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.
  • the device may be a network device and so on. In a possible implementation, if the device is used to implement the method described in the first aspect, the device includes:
  • Memory used to store program instructions
  • the communication interface is configured to receive a first message from the second wireless access device, where the first message includes a first control plane message and first indication information.
  • the processor is configured to determine the first radio bearer according to the first indication information.
  • the communication interface is further configured to send a second message including the first control plane message to the first wireless backhaul device through the first radio bearer.
  • the device includes:
  • Memory used to store program instructions
  • the communication interface is configured to receive a first message from the second wireless access device, where the first message includes a first control plane message and first indication information.
  • the processor is used to determine the first indication information.
  • the communication interface is further configured to send a first message including the first indication information to the first wireless access device.
  • an embodiment of the present application provides a device, the device including a processor, configured to implement the method described in the third aspect, or to implement the method described in the fourth aspect, or to implement the first The method described in five aspects.
  • the device may also include a memory for storing instructions and/or data. The memory is coupled with the processor, and when the processor executes the program instructions stored in the memory, it can implement the method described in the second aspect above, or can implement the method described in the fourth aspect above, for realizing the above The method described in the fifth aspect.
  • the device may also include a communication interface, which is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.
  • the device may be a terminal device and so on. In a possible implementation, if the device is used to implement the method described in the third aspect, the device includes:
  • the device includes:
  • Memory used to store program instructions
  • a communication interface for receiving a configuration message, the configuration message including the correspondence between the first radio bearer and the first type of control plane message;
  • the processor is configured to obtain a second control plane message, where the type of the second control plane message is the first type, and the first wireless backhaul device determines the second control plane message corresponding to the first type of the second control plane message according to the configuration message A wireless bearer.
  • the communication interface is configured to send a third message including a second control plane message to the first wireless access device through the first radio bearer.
  • the device includes:
  • the device includes:
  • the memory is used to store program instructions.
  • the communication interface receives the third message including the second control plane message from the first wireless backhaul device through the first radio bearer.
  • the processor is configured to determine the second wireless access device according to the destination address of the second control plane message.
  • a communication interface for sending a fourth message including a second control plane message to the second radio access network device, so that the first radio access device can send the second control plane message in the fourth message to the second radio access device .
  • the device includes:
  • the device includes:
  • Memory used to store program instructions
  • the processor generates a configuration message, where the configuration message includes a correspondence between the first radio bearer and the first type of control plane message.
  • the communication interface sends the configuration message to the first wireless backhaul device or the first wireless access device.
  • the embodiments of the present application also provide a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute any possible design of the first aspect, the first aspect, and the second aspect Or any possible design method of the second aspect, any possible design method of the third or third aspect, any possible design method of the fourth or fourth aspect, any of the fifth or fifth aspects A possible design method, the sixth aspect or any possible design method of the sixth aspect.
  • the embodiments of the present application also provide a chip system.
  • the chip system includes a processor and may also include a memory for implementing any possible design of the first aspect, the first aspect, the second aspect, or the second aspect. Any possible design method of the second aspect, any possible design method of the third aspect or the third aspect, any possible design method of the fourth or fourth aspect, any of the fifth aspect or the fifth aspect Possible design method, the sixth aspect or any one of the possible design methods of the sixth aspect.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • the embodiments of the present application also provide a computer program product, including instructions, which when run on a computer, cause the computer to execute any possible design of the first aspect, the first aspect, the second aspect, or Any possible design method of the second aspect, any possible design method of the third aspect or the third aspect, any possible design method of the fourth or fourth aspect, any of the fifth aspect or the fifth aspect
  • a computer program product including instructions, which when run on a computer, cause the computer to execute any possible design of the first aspect, the first aspect, the second aspect, or Any possible design method of the second aspect, any possible design method of the third aspect or the third aspect, any possible design method of the fourth or fourth aspect, any of the fifth aspect or the fifth aspect
  • One possible design method, the sixth aspect or any one possible design method of the sixth aspect are possible design method, the sixth aspect or any one possible design method of the sixth aspect.
  • an embodiment of the present application provides a system that includes the device described in the sixth aspect or the sixth aspect to the device described in the twentieth or twentieth aspect.
  • FIGS. 1A to 1B are schematic diagrams of a network architecture provided by an embodiment of this application.
  • FIGS. 2A to 2B are schematic diagrams of another network architecture provided by an embodiment of this application.
  • 3(a) to 3(d) are schematic diagrams of a protocol stack structure provided by an embodiment of the application.
  • FIG. 4 is a schematic flowchart of the first communication method provided by an embodiment of this application.
  • FIG. 5 is a schematic flowchart of a second communication method provided by an embodiment of this application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • NR new radio
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • eLTE evolved long term evolution
  • future communication systems and other communication systems.
  • NR new radio
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • eLTE evolved long term evolution
  • future communication systems and other communication systems.
  • FIG. 1A shows a schematic diagram of a communication system applicable to the communication method of an embodiment of the present application.
  • the communication system includes sub-IAB donor base stations, IAB nodes, and terminal side equipment.
  • Fig. 1B is another expression form of the communication system shown in Fig. 1A, and the meaning of the substantial expression is the same, and the details are not repeated here.
  • the names of the interfaces between the devices are also shown, such as the wireless interface between the terminal-side device and the IAB node (named NR Uu interface in the figure) and the relationship between the IAB node and the IAB host base station. (It can be called NR wireless backhaul interface. Since this interface is also based on NR Uu interface protocol for communication, it is named NR Uu interface in the figure).
  • the names of these interfaces are just examples and do not mean When the communication system version changes, the corresponding name can also be replaced with the name of the corresponding function in other wireless communication networks.
  • the IAB network shown in FIG. 1A supports multi-hop networking.
  • the IAB network shown in Figure 1A not only supports multi-hop networking, but also multi-connection networking.
  • each IAB node regards its neighboring node providing access and backhaul services as a parent node, and accordingly, each IAB node can be regarded as a child node of its parent node.
  • the parent node of the IAB node is the IAB host, and the IAB host regards the IAB node as a child node.
  • FIG. 1A shows a schematic diagram of the network architecture of an E-UTRAN and NR dual connectivity (E-UTRAN NR Dual Connectivity, EN-DC) system.
  • the communication system includes a packet data core network (evolved packet core, EPC) equipment, a base station (eNB) of an LTE system, an IAB donor, an IAB node, and terminal side equipment.
  • EPC packet data core network
  • eNB base station
  • Fig. 2A may also be referred to as the non-standalone (NSA) networking of the IAB network.
  • Fig. 2B is another expression form of the communication system shown in Fig. 2A, and the meaning of the substantial expression is the same, and the details are not repeated here.
  • the base station of the LTE system (the eNB in the figure) is the master base station (so it can also be called Master eNB, or MeNB for short), which provides LTE air interface (LTE Uu) connections for IAB nodes, and connects to the core network EPC through The S1 interface performs user plane data transmission and control plane data transmission.
  • the IAB donor base station is a secondary base station, which provides an NR air interface (NR Uu) connection for the IAB node, and performs user plane data transmission with the core network EPC through the S1 interface.
  • the terminal-side equipment also supports dual connectivity.
  • the UE connects to the primary base station (eNB) through the LTE Uu interface, and connects to the secondary base station (IAB node, or IAB donor base station) through the NR Uu interface.
  • Figure 2A is only an example of networking.
  • the NSA networking of the IAB network also supports multi-hop IAB networking.
  • the terminal equipment in Figures 2A and 2B can be connected to two or more IAB nodes.
  • the IAB donor base station that is, the IAB node can be connected to the IAB donor base station through a multi-hop backhaul link.
  • the NSA networking of the IAB network also supports single-hop IAB networking.
  • the terminal device in FIG. 2A and FIG. 2B can be connected to the IAB donor base station through an IAB node.
  • the IAB node when the IAB node is connected to the eNB, it communicates with the eNB through a one-hop LTE link.
  • the dual-connection scenario applicable to this application can be not only the EN-DC networking scenario shown in Figure 2A and Figure 2B, but also a dual-connection composed of an IAB network and an IAB network, or an IAB
  • the above examples do not constitute a limitation on the scenario.
  • the IAB node may also be referred to as a relay node (relay node, RN).
  • relay node relay node
  • the IAB node may include at least one mobile terminal (MT) unit and at least one distributed unit (DU).
  • MT mobile terminal
  • DU distributed unit
  • FIGS. 1A and 2A only the IAB node includes an MT unit and a DU as an example for description.
  • the MT unit in the IAB node implements the IAB as a terminal to communicate with the parent node of the IAB node and the IAB host node, and has the function of user equipment (UE).
  • UE user equipment
  • the DU in the IAB node provides access services for its attached terminal side devices or other IAB nodes, and can also communicate with the IAB host node based on the F1 interface.
  • the MT in the IAB node may also be referred to as the MT functional entity in the IAB node
  • the DU in the IAB node may also be referred to as the DU functional entity in the IAB node.
  • the MT in the IAB node and the MT functional entity in the IAB node are all referred to as "IAB node MT”
  • the DU in the IAB node and the DU functional entity in the IAB node are all referred to as "IAB node DU”.
  • the IAB node can provide a wireless access service for the terminal-side device, and the service data or control information of the terminal-side device is connected to the IAB donor (IAB donor) or the network-side device through the wireless backhaul link by the IAB node for transmission.
  • the IAB host can be an access network element with a complete base station function, or an access network element in the form of a separated centralized unit (CU) and a distributed unit (DU).
  • the CU in the IAB host may also be referred to as the CU functional entity in the IAB host
  • the DU in the IAB host may also be referred to as the DU functional entity in the IAB host.
  • IAB host CU also known as IAB-donor-CU
  • IAB-donor-DU The DU functional entity is abbreviated as IAB-donor-DU (also known as IAB-donor-DU).
  • the IAB-donor-DU may also be a form in which the control plane (CP) and the user plane (UP) are separated, for example,
  • An IAB host CU is composed of one CU-CP (also called IAB-donor-CU-CP) and multiple CU-UPs (also called IAB-donor-CU-UP), which is not limited in the embodiment of the application.
  • the F1 interface involved in the embodiments of this application is the interface between the DU of the IAB node and the IAB donor base station, or the interface between the DU of the IAB node and the CU of the IAB donor base station, or the interface between the IAB section and the IAB donor base station.
  • Interface, F1 interface can also be called F1* interface and other names. For the convenience of description, in the embodiments of the present application, it can be collectively called F1 interface, but the name is not limited.
  • the F1 interface may also be an interface between functional entities within a device.
  • the F1 interface may be the interface between the DU in the base station and the CU in the base station. .
  • the F1 interface involved in the embodiment of the present application supports a user plane protocol and a control plane protocol.
  • FIG. 3(a) it is a schematic diagram of a protocol stack of a user plane protocol provided in an embodiment of this application.
  • the IAB host consists of the IAB host DU (IAB-donor-DU) and the IAB host CU (IAB-donor-CU).
  • the IAB host CU includes the control plane functional unit (IAB-donor-CU-CP) and the user plane of the IAB host CU.
  • IAB-donor-CU-UP Functional unit (IAB-donor-CU-UP). Since Figure 3(a) is an example of the user plane protocol stack, IAB only shows the IAB-donor-CU-UP part. Correspondingly, the control plane protocol stack of Figure 3(b) only shows IAB-donor-CU -CP part.
  • the peer-to-peer protocol layer between the terminal-side device and the IAB host includes the Service Data Adaptation Protocol (SDAP) layer and the Packet Data Convergence Protocol (PDCP) layer.
  • SDAP Service Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol
  • the peer-to-peer protocol between the terminal side device and the IAB node 2 includes a radio link control (RLC) layer, a medium access control (MAC) layer, and a physical (Physical, PHY) layer.
  • RLC radio link control
  • MAC medium access control
  • PHY Physical
  • the peer-to-peer protocol includes the general packet radio service (General Packet Radio Service, GPRS) tunneling protocol user plane (GPRS Tunnelling Protocol User Plane, GTP-U) layer, user Datagram Protocol (User Datagram Protocol, UDP) layer and Internet Protocol (Internet Protocol, IP) layer.
  • GPRS General Packet Radio Service
  • GTP-U General Packet Radio Service
  • UDP User Datagram Protocol
  • IP Internet Protocol
  • the user plane protocol layer of the F1 interface further includes a PDCP layer and/or an IP security (IP Security, referred to as IPsec) layer.
  • IP Security IP Security
  • the IPsec layer or the PDCP layer is located above the IP layer and below the GTP-U layer.
  • the equivalent protocol layers between the IAB node 2 and the IAB node 1 include a Backhaul Adaptation Protocol (BAP) layer, an RLC layer, a MAC layer, and a PHY layer.
  • BAP Backhaul Adaptation Protocol
  • the peer-to-peer protocol between the IAB node 1 and the IAB host includes the BAP layer, the RLC layer, the MAC layer, and the PHY layer.
  • FIG. 3(a) exemplarily, as shown in FIG. 3(b), it is a schematic diagram of a protocol stack of a control plane protocol provided by an embodiment of this application.
  • the peer-to-peer protocol between the terminal-side device and the IAB host includes a radio resource control (radio resource control, RRC) layer and a PDCP layer.
  • the peer-to-peer protocol between the terminal-side device and the IAB node 2 includes the RLC layer, the MAC layer, and the PHY layer.
  • the IAB node 2 and the IAB host are in the control plane of the F1 interface, and the equivalent protocols include the F1 application protocol (F1 application protocol, F1AP) layer, the stream control transport protocol (stream control transport protocol, SCTP) layer, and the IP layer.
  • the control plane protocol layer of the F1 interface further includes one or more of a PDCP layer, an IPsec layer, and a datagram transport layer security (DTLS) layer.
  • the IPsec layer, the PDCP layer, or the DTLS layer is located above the IP layer and below the F1AP layer.
  • the peer-to-peer protocol between the IAB node 2 and the IAB node 1 includes the BAP layer, the RLC layer, the MAC layer, and the PHY layer.
  • the peer-to-peer protocol between the IAB node 1 and the IAB host includes the BAP layer, the RLC layer, the MAC layer, and the PHY layer.
  • the BAP layer has at least one of the following capabilities: adding routing information (Routing information) that can be recognized by the wireless backhaul node to the data packet, performing route selection based on the routing information that can be recognized by the wireless backhaul node, and
  • the data packet adds identification information related to the quality of service (QoS) requirements that can be identified by the wireless backhaul node, and performs QoS mapping on the multi-segment link including the wireless backhaul node for the data packet.
  • QoS quality of service
  • the packet adds data packet type indication information, sends flow control feedback information to nodes with flow control capabilities, and sends back link failure indication information to child nodes.
  • the name of the protocol layer with these capabilities is not necessarily the BAP layer, and those skilled in the art can understand that any protocol layer with these capabilities can be understood as the BAP layer in the embodiments of the application.
  • the routing information that can be recognized by the wireless backhaul node may be the identity of the terminal, the identity of the IAB node that the terminal accesses, the identity of the host node, the identity of Donor-DU, the identity of Donor-CU, the identity of the transmission path One or more types of information such as logos.
  • the identification information related to the QoS requirements may be the QoS flow identifier (QFI) of the terminal, the RB identifier of the terminal, the differentiated services code point (DSCP), Internet Protocol version 6
  • QFI QoS flow identifier
  • DSCP differentiated services code point
  • IPv6 IP protocol version 6, referred to as IPv6
  • some bits in the traffic class field for example, the highest 6 bits
  • the QoS mapping on the multi-segment link may be: based on the mapping identification information carried in the data packet in the wireless backhaul link (such as the RB identification of the terminal, the control plane message type carried in the data packet, or the information in the data packet header information).
  • the DSCP executes the slave terminal RB to the RLC bearer or RLC channel or logical channel on the wireless backhaul link; based on any two or more of the RB, RLC bearer, RLC channel and logical channel of the ingress link and egress link Correspondence between the mapping from the RB or RLC bearer or RLC channel or logical channel of the ingress link to the RB or RLC bearer or RLC channel or logical channel of the egress link is performed.
  • the data packet type indication information may be used to indicate that the content encapsulated in the BAP layer contains any one or more of the following types: user plane data of the terminal, RRC message of the terminal, RRC message of the IAB node, IAB node Control layer application messages (such as F1AP messages) on the interface with the host node (or Donor-CU or CU-CP), flow control feedback messages generated by IAB nodes, header compression feedback messages generated by IAB nodes, and BAP layer data PDU, BAP layer control PDU, etc.
  • IAB node Control layer application messages such as F1AP messages
  • a node with flow control capability may be a host node, Donor-DU, Donor-CU, parent node of an IAB node, and other nodes that provide backhaul services for the IAB node.
  • the content of the flow control feedback information can include one or more of the following information: the cache status and load level of the IAB node, and the status of a certain link of the IAB node (such as link blockage or link recovery ( resume) or link quality information, etc.), including the bandwidth and transmission delay of a certain link of the IAB node, the sequence number of the data packet lost by the IAB node, and the sequence number of the data packet that the IAB node has successfully sent to the terminal or its child nodes.
  • the function of the BAP layer can also be extended by the functions of any layer (for example, RLC layer, MAC layer, PDCP layer, etc.) or any number of layers included in layer 2, without additional protocol Floor.
  • any layer for example, RLC layer, MAC layer, PDCP layer, etc.
  • any number of layers included in layer 2 without additional protocol Floor.
  • the IAB node MT may have the protocol stack of the UE, and the communication protocol stack between the IAB host and the parent node can refer to the protocol stack of the UE in Figure 3(a) and Figure 3(b). understanding.
  • the IAB node may also have an RRC layer, and may establish an RRC connection with the IAB host, and communicate based on the RRC layer.
  • Figures 3(a) and 3(b) are example diagrams of the protocol diagrams of the independent networking architecture.
  • the user plane protocol stack between the IAB node and the IAB host can refer to Figure 3(a), the control plane
  • One way can refer to Figure 3(b), and the other way can refer to the protocol stack diagrams shown in Figure 3(c) and Figure 3(d) (that is, F1AP messages pass LTE Link transmission).
  • the F1AP message in Figure 3(c) will be encapsulated in the RRC message of the NR standard first, and then will be transmitted over the LTE air interface and X2 interface.
  • the difference between Figure 3(d) and Figure 3(c) is that there is no need Carry out NR RRC encapsulation.
  • the schematic diagrams of the protocol stacks in Figure 3(c) and Figure 3(d) are to facilitate the understanding of how to transmit F1AP messages of the AB node on the X2 interface and the LTE air interface.
  • the LTE air interface between the IAB node and the MeNB and the MeNB and The X2 interface between IAB hosts also includes other protocol layers, which are not shown in the figure.
  • the RLC layer of the LTE air interface it also includes the equivalent MAC layer between the IAB node and the MeNB node, and the equivalent PHY layer; the X2 interface also includes the equivalent wired connection between the MeNB and the IAB host.
  • Link layer (Layer 2, L2) and physical layer (Layer 1, L1)
  • the X2 interface may also include a protocol layer for security protection of X2AP, for example, a DTLS layer is included between X2AP and IP layer , Or IPsec protocol layer, etc.
  • the protocol stack architecture in the IAB network shown in Figures 3(a) to 3(d) of the embodiment of the present application is only an example, and the method provided in the embodiment of the present application does not depend on this example. , But through this example, the method provided in the embodiments of the present application is easier to understand.
  • the terminal-side device is a device with a wireless transceiver function or a chip that can be installed in the device.
  • the device with wireless transceiver function may also be called user equipment (UE), access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, user terminal, user agent Or user device.
  • UE user equipment
  • the terminal-side devices in the embodiments of this application may be mobile phones, tablet computers (Pad), computers with wireless transceiver functions, virtual reality (VR) terminals, and augmented reality (augmented reality) terminals.
  • the network side device may be a wireless access device under various standards, such as an evolved Node B (eNB), a radio network controller (RNC), or a Node B (Node B).
  • B, NB base station controller
  • BSC base transceiver station
  • BTS base transceiver station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • baseband unit baseband unit, BBU
  • It can also be the gNB or transmission point (TRP or TP) in the 5G (NR) system, one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or it can also be a gNB or The network node of the transmission point, such as a baseband unit (BBU), or a DU under a
  • BBU baseband
  • the communication method provided by the embodiment of the present application involves two scenarios of downlink F1AP message transmission and uplink F1AP message transmission, and the two scenarios will be described separately below.
  • the first wireless access device and the second wireless access device are both connected to the first wireless backhaul device, and the second wireless access device can connect to the first wireless access device.
  • the device sends the first message. Since the first message includes the first control plane message and the first indication information, the first wireless access device may determine the first radio bearer according to the first indication information, and then send the first radio bearer to the first wireless backhaul device through the first radio bearer: The second message of the first control plane message.
  • the first control plane message may be a control plane message on the F1 interface (for example, a downlink F1AP message).
  • the first radio bearer may be an SRB between the first radio access device and the first radio backhaul device (for example, SRB0 or SRB1 or SRB2 on the LTE air interface).
  • the second wireless access device may indicate in the first indication information the radio bearers corresponding to the downlink F1AP messages of different message types, so that the first access network device transmits the downlink F1AP messages through the corresponding radio bearers.
  • the first indication information the radio bearers corresponding to the downlink F1AP messages of different message types, so that the first access network device transmits the downlink F1AP messages through the corresponding radio bearers.
  • the communication standards of the first wireless access device and the second wireless access device may be different.
  • the first wireless access device may be the primary base station (eNB) in FIG. 2A
  • the second wireless access device The device may be the secondary base station (IAB donor base station) in FIG. 2B
  • the first wireless backhaul device may be the IAB node (or the MT functional entity of the IAB node) in FIG. 2A.
  • the second wireless access device may be a CU functional entity in the IAB donor base station.
  • the second wireless access device may be the CU-CP in the IAB donor base station Functional entity. If the second wireless access device is the secondary base station (IAB donor base station) in Figure 2B, then the second wireless access device can be directly connected to the first wireless backhaul device, and the second wireless access device can also be connected to other wireless backhaul devices first. For wireless backhaul devices, other wireless backhaul devices are then connected to the first wireless backhaul device, that is, the second wireless access device supports single-hop or multi-hop connection to the first wireless backhaul device.
  • CP control plane
  • UP user name
  • the second wireless access device is IAB-donor-CU or IAB-donor-CU-CP, then the second wireless access device can be connected to the first wireless backhaul device through IAB-donor-DU, or it can be connected through IAB-donor-DU.
  • the donor-DU and one or more other wireless backhaul devices are connected to the first wireless backhaul device.
  • the first wireless backhaul device as the IAB node in FIG. 2A
  • the first wireless access device as the eNB of the LTE system in FIG. 2A
  • the second wireless access device as the IAB donor base station in FIG. 2A as an example.
  • the IAB donor base station in Figure 4 can also be replaced with IAB-donor-CU or IAB-donor-CU-CP. Other situations can be deduced by analogy.
  • FIG. 4 it is a schematic flowchart of the first communication method provided by the embodiment of this application. Referring to Figure 4, the method includes the following steps.
  • Step 401 The IAB donor base station determines first indication information.
  • the first indication information may directly indicate the identity of the first radio bearer.
  • the eNB can directly determine the first radio bearer according to the identity of the first radio bearer.
  • the first indication information may also indicate the first type of the first control plane message.
  • the first control plane message may be a control plane message on the F1 interface (for example, a downlink F1AP message).
  • the first type of F1AP message may be a non-UE associated (unrelated to the UE) message type, or a UE associated (related to the UE) message type.
  • the type of the F1AP message may also indicate the RRC message of the child node or UE served by the IAB node carried in the F1AP message, and the control plane signaling radio bearer type corresponding to the RRC message is SRB 0 or SRB 1. Or SRB2, so the first type of the F1AP message may also be the signaling radio bearer type (SRB 0, or SRB 1, or SRB2) corresponding to the RRC message carried in it.
  • the method further includes step 400.
  • the IAB donor base station needs to send a configuration message to the eNB, where the configuration message includes the mapping relationship between the type of the control plane message and the radio bearer (including the first type and the second type). A mapping relationship between radio bearers).
  • the eNB can use the mapping relationship to determine the corresponding first radio bearer according to the first type of the first control plane message.
  • Step 402 The IAB donor base station sends a first message to the eNB, where the first message includes a first control plane message and a first indication message.
  • the first control plane message may be the downlink F1AP message exemplified above
  • the first radio bearer may be the SRB of the IAB node on the LTE air interface (for example, SRB 1 or SRB 0 or SRB2).
  • the IAB donor base station may encapsulate the first indication information and the downlink F1AP message in the X2AP message, and then the IAB donor base station sends to the eNB through the X2 interface.
  • the IAB donor base station can add the SCTP protocol header information and IP header information of the F1-C interface to the downlink F1AP message, and then encapsulate the above information in the NR standard RRC message of the IAB node , Then carry the RRC message of the NR standard in the X2AP message, and then send the X2AP message to the eNB.
  • the IAB donor base station may also add SCTP protocol header information and IP header information to the downlink F1AP message, directly carry the above information in the X2AP message, and then send the X2AP message to the eNB. That is, in this embodiment, the RRC message encapsulation of the NR standard is no longer required.
  • the F1-C interface is the control plane of the F1 interface between the IAB host base station and the IAB node
  • the protocol layer of the F1-C interface includes the F1AP layer, the SCTP layer, the IP layer, and the SCTP protocol header information of the F1-C interface
  • IP header information that is, the SCTP protocol layer header information of the F1-C interface and the IP layer header information of the F1-C interface, respectively.
  • Step 403 The eNB determines the first radio bearer according to the first indication information in the received first message.
  • the eNB After the eNB receives the X2AP message carrying the downlink F1AP message, it needs to determine the corresponding radio bearer. There are many ways to determine the radio bearer. In a possible embodiment, if the first indication information indicates the identity of the first radio bearer, in this way, the eNB can directly determine the first radio bearer according to the identity of the first radio bearer. . In another possible embodiment, if the first indication information is the first type of the first control plane message. In this way, the eNB can use the mapping relationship to determine the corresponding first radio bearer according to the first type of the first control plane message.
  • Step 404 The eNB sends a second message to the IAB node through the first radio bearer, where the second message includes the first control plane message.
  • the eNB may encapsulate the downlink F1AP message in an LTE standard RRC message, and send the RRC message to the IAB node (specifically, the MT of the IAB node) through the first radio bearer of the LTE link.
  • the RRC message of the LTE standard sent by the eNB to the IAB node may carry the downlink F1AP message with the SCTP header information and IP header information of the F1-C interface added;
  • the LTE standard RRC message sent can carry the NR standard RRC message of the IAB node, and the NR standard RRC message carries the downlink F1AP message with the SCTP header information and IP header information of the F1-C interface added. .
  • Step 405 the IAB node receives the second message.
  • the IAB node may receive the RRC message sent from the eNB, and then obtain the downlink F1AP message from the RRC message.
  • the eNB under the IAB non-independent networking architecture, if the downlink F1AP message is transmitted through the LTE air interface, the eNB needs to obtain the downlink F1AP message and first indication information from the IAB node, and determine the first radio bearer according to the first indication information Because the first radio bearer corresponds to the type of the downlink F1AP message, the eNB can select different SRBs for different types of the downlink F1AP message, thereby providing effective QoS guarantee for the terminal service.
  • the first wireless access device or the second wireless access device may send a configuration message to the first wireless backhaul device, and the configuration message may include the correspondence between the types of the radio bearer and the control plane message (for example, including the first radio bearer and the control plane). Correspondence between the first types of face-to-face messages).
  • the first wireless backhaul device receives the configuration message, it can determine the first radio bearer used to send the second control plane message of the first type, and then the first wireless backhaul device sends the first radio bearer to the first radio through the first radio bearer.
  • the access device sends a third message including the second control plane message, so that the first wireless access device sends the second control plane message to the second wireless access device.
  • the second control plane message may be a control plane message on the F1 interface (for example, an uplink F1AP message on the F1-C interface between the first wireless backhaul device and the second wireless access device).
  • the first radio bearer is a radio bearer on the link between the first wireless backhaul device and the first wireless access device.
  • the first wireless backhaul device may determine the first radio bearer corresponding to the uplink F1AP message to be sent according to the configuration information, and then send the second control plane message to the first wireless access device on the first radio bearer, and then The first wireless access device forwards the second control plane message to the second wireless access device. So that the first wireless backhaul device selects different radio bearers when transmitting different types of F1AP messages through the air interface between the first wireless backhaul device and the first wireless access device, so as to provide effective QoS for the service of the terminal connected to the first wireless backhaul device Guaranteed.
  • the communication standards of the first wireless access device and the second wireless access device may be different.
  • the first wireless access device may be the primary base station (eNB) in FIG. 2A
  • the second wireless access device The device may be the secondary base station (IAB donor base station) in FIG. 2B
  • the first wireless backhaul device may be the IAB node in FIG. 2A.
  • the second wireless access device may be a CU functional entity in the IAB donor base station.
  • the second wireless access device may be the CU-CP in the IAB donor base station Functional entity. If the second wireless access device can be the secondary base station (IAB donor base station) in Figure 2B, then the second wireless access device can be directly connected to the first wireless backhaul device, and the second wireless access device can also be connected to For other wireless backhaul devices, the other wireless backhaul devices are then connected to the first wireless backhaul device, that is, the second wireless access device supports single-hop or multi-hop connection to the first wireless backhaul device.
  • CP control plane
  • UP user name
  • the second wireless access device is IAB-donor-CU or IAB-donor-CU-CP, then the second wireless access device can be connected to the first wireless backhaul device through IAB-donor-DU, or it can be connected through IAB-donor-DU.
  • the donor-DU and one or more other wireless backhaul devices are connected to the first wireless backhaul device.
  • the first wireless backhaul device as the IAB node in FIG. 2A
  • the first wireless access device as the eNB of the LTE system in FIG. 2A
  • the second wireless access device as the IAB donor base station in FIG. 2A as an example.
  • Other situations can be deduced by analogy.
  • FIG. 5 it is a schematic flowchart of the second communication method provided by this embodiment of the application. Referring to Figure 5, the method includes the following steps.
  • Step 501 the IAB node receives the configuration message.
  • the configuration message includes the corresponding relationship between the types of radio bearers and control plane messages, for example, includes the corresponding relationship between the first radio bearer and the first type of control plane messages.
  • the radio bearer in the configuration relationship may be an SRB of an air interface of LTE (for example, SRB1 or SRB0 or SRB2).
  • the second control plane message may be a control plane message (for example, an uplink F1AP message) on the F1 interface between the IAB node and the IAB donor base station.
  • the configuration message may be received from the IAB donor base station or eNB.
  • the type of the F1AP message can be a non-UE associated (independent of the UE) message type, or a UE associated (related to the UE) message type.
  • it may also include the RRC message of the child node or terminal served by the IAB node carried in the F1AP message.
  • the control plane signaling radio bearer type corresponding to the RRC message is SRB 0, or SRB 1, or SRB2, so F1AP
  • the first type of the message may also be the signaling radio bearer type (SRB 0, or SRB 1, or SRB2) corresponding to the RRC message carried therein.
  • the IAB node may receive the configuration message from the IAB donor base station.
  • the method further includes step 500a.
  • the IAB donor base station sends configuration information to the IAB node.
  • the configuration information can be carried in the RRC message (the RRC message is an RRC message of the NR standard) sent by the IAB donor base station to the IAB node (specifically, the MT function entity of the IAB node), or the configuration information can be carried in the IAB donor base station In the F1AP message sent to the IAB node (specifically, it may be the DU functional entity of the IAB node).
  • the IAB node may receive the configuration message from the eNB.
  • the method further includes step 500b.
  • the eNB sends configuration information to the IAB node.
  • the configuration message may be carried in an RRC message (the RRC message is an LTE standard RRC message) sent by the eNB to the IAB node (specifically, it may be the MT function entity of the IAB node).
  • the eNB may obtain the configuration message from the IAB donor base station before sending the configuration message to the IAB node.
  • Step 502 The IAB node obtains a second control plane message, where the type of the second control plane message is the first type.
  • the second control plane message may be an uplink F1AP message.
  • the IAB node may generate the uplink F1AP message.
  • the IAB node may determine that the type of the F1AP message is the first type.
  • Step 503 The IAB node determines the first radio bearer corresponding to the first type of the second control plane message according to the configuration message.
  • the IAB node when sending the uplink F1AP message, can use the mapping relationship in the configuration message to determine the SRB of the LTE air interface used to transmit the F1AP message.
  • Step 504 The IAB node sends a third message to the eNB through the first radio bearer, where the third message includes the second control plane message.
  • the IAB node performs the SCTP protocol layer and IP layer processing of the F1-C interface on the F1AP message, and then encapsulates it in an RRC message and sends it to the eNB via the LTE air interface for forwarding by the eNB.
  • Step 505 The eNB receives the third message and sends the second control plane message to the IAB donor base station.
  • the eNB can determine the IAB donor base station based on the destination IP address, and then use the X2 interface to transfer the second control plane message (that is, the uplink of the IAB node). F1AP message) is sent to the IAB donor base station.
  • the IAB node when the IAB node sends the uplink F1AP message, it can be transmitted through the LTE air interface (that is, the F1AP message is encapsulated in the RRC message of the LTE standard and sent to the eNB via the LTE air interface, and then sent from the eNB to the IAB donor Forwarding), it may also be transmitted through the NR air interface (that is, the F1AP message is sent to the IAB host through the NR backhaul link), so the IAB node also needs to determine which air interface to transmit the downlink F1AP message through. To this end, the IAB donor base station will configure at least two different IP addresses for the IAB node.
  • the IP address can be the source IP address used by the IAB node when sending uplink F1AP messages, or the IAB node used when sending uplink F1AP messages.
  • the destination IP address (that is, the IP address of the IAB donor base station).
  • the IAB donor base station configures the correspondence between different IP addresses (which may be the source IP address and/or destination IP address of the F1AP message sent by the IAB node) and different air interfaces (LTE air interface or NR air interface) to the IAB node.
  • the IAB node can select different IP addresses (including source IP address and/or destination IP address) when sending uplink F1AP messages, and then determine whether to encapsulate the F1AP message in the RRC message via the LTE air interface according to the different IP addresses To send, the F1AP message is still sent through the NR backhaul link.
  • the IAB node may determine whether the lower protocol layer is the RRC layer of the LTE air interface or whether the IP data packet encapsulated with the uplink F1AP message is delivered to the lower layer according to the source IP address and or destination IP address carried in the data packet.
  • the BAP layer of the NR backhaul link may determine whether the lower protocol layer is the RRC layer of the LTE air interface or whether the IP data packet encapsulated with the uplink F1AP message is delivered to the lower layer according to the source IP address and or destination IP address carried in the data packet.
  • the IAB donor base station can send an RRC message to the IAB node (specifically the MT of the IAB node), or send an F1AP message to the IAB node (specifically the DU of the IAB node), and the RRC message or F1AP message carries different IP addresses and Correspondence of different air interfaces: for example, IP address 1 corresponds to the LTE air interface, and IP address 2 corresponds to the NR air interface, where IP address 1 and IP address 2 are the source IP address or the destination IP address of the uplink F1AP message sent by the IAB node; or, IP Address 1 and IP address 2 correspond to the LTE air interface, IP address 3 and IP address 4 correspond to the NR air interface, where IP address 1 and IP address 3 are the source IP addresses of the IAB node to send uplink F1AP messages (that is, the IAB node’s own IP address) ), the IP address 2 and the IP address 4 are the destination IP addresses of the IAB node to send the uplink F1AP message (that is, the
  • the IAB donor base station configures an IP address for the IAB node: IP address 1, which corresponds to the LTE air interface (or specifies that the lower protocol layer corresponding to the F1AP message is LTE RRC); and the IAB donor base station configures an IP address for the IAB node: IP address 2, which corresponds to the NR air interface (or indicates that the lower protocol layer corresponding to the F1AP message is the backhaul adaptation protocol (BAP) layer).
  • IP address 1 and IP address 2 may be the IP address of the IAB node or the IP address of the IAB donor base station.
  • the IAB node uses IP address 2 when sending the uplink F1AP message, and selects the corresponding NR backhaul link for transmission; when the IAB node and the IAB donor base station are between When the inter-NR backhaul link is unavailable (for example, at least one segment of the wireless backhaul link has a radio link failure or blockage), the IAB node uses IP address 1 when sending the uplink F1AP message, and selects the corresponding LTE link for transmission . For this reason, the IAB node can configure different IP addresses for the uplink F1AP messages transmitted by different paths to facilitate routing selection.
  • the IAB donor base station can configure a first pair of addresses (destination address IP address 2 and source address IP address 1) and a second pair of addresses (destination address IP address 4 and source address IP address 3) for the IAB node, based on the above correspondence Relationship, the IP address 2 may correspond to the LTE air interface (or specify that the lower protocol layer corresponding to the F1AP message is LTE RRC), and the IP address 4 may correspond to the NR air interface.
  • the IAB node uses the second pair of addresses when sending the uplink F1AP message and selects the corresponding NR backhaul link for transmission; when the IAB node and the IAB donor base station When the NR backhaul link between the two is unavailable (for example, at least one segment of the wireless backhaul link has a radio link failure or blockage), the IAB node uses the first pair of addresses when sending the uplink F1AP message, and selects the corresponding LTE link Road transmission. For this reason, the IAB node can configure different IP addresses for the uplink F1AP messages transmitted by different paths to facilitate routing selection.
  • the IAB node For the uplink F1AP message, that is, for the F1AP message sent by the IAB node to the IAB donor base station, when the IAB node needs to transmit the F1AP message via the LTE air interface, the IAB node needs to determine the SRB of the LTE air interface according to the configuration information.
  • the IAB node encapsulates different F1AP messages on different LTE SRBs, so that when the F1AP message of the IAB node is transmitted on the LTE air interface, the type of the F1AP message is different.
  • the eNB determines that the SRB on the LTE air interface between the IAB node and the eNB is also different. Therefore, different QoS guarantees can be provided.
  • this application also provides a communication method, which is used to realize that the primary base station (or referred to as the primary node) of the IAB node selects a suitable secondary base station (or referred to as the secondary node) for the IAB node, as shown in Figure 6 As shown, the method includes the following steps.
  • Step 601 The first node sends a broadcast message, where the broadcast message includes indication information, and the indication information is used to indicate that the first node can support the access of the IAB node.
  • the first node may be an IAB donor base station (specifically, it may be an IAB donor DU), or the first IAB node.
  • the first node may carry the indication information in system information (SI) of the cell it serves.
  • SIB System Information Block
  • Step 602 The second node receives the broadcast message, and obtains indication information from the broadcast message.
  • the second node reads the instruction information sent by the first node, and determines that the first node supports the access of the IAB node.
  • the second node is the second IAB node
  • the second node accesses the cell served by the third node (that is, the primary cell that provides access services for the second node)
  • the third node is the primary base station of the second node, for example,
  • the three nodes may be eNBs of the LTE standard.
  • Step 603 The second node sends a notification message to the third node, where the notification message includes the indication information that the first node or the cell served by the first node supports IAB node access.
  • the notification message may also include the measurement result of the second node on the serving cell of the first node.
  • Step 604 The third node determines that the first node is the secondary base station of the second node, or selects the cell served by the first node as the secondary cell of the second node.
  • the third node selects the first node as the secondary base station of the second node according to the notification message received in step 603. Among them, if the first node is the first IAB node, the third node selects the IAB donor base station connected to the first IAB node as the secondary base station of the second node, and selects the first IAB node as the second node under the IAB donor base station If the first node is an IAB donor base station, the third node selects the IAB donor base station as the secondary base station of the second node.
  • the third node will perform the step of adding a secondary base station for the second node.
  • the primary serving base station of the IAB node can select a secondary base station that supports IAB access for the IAB node, avoiding the selected secondary base station from being unable to support the access of the IAB node, resulting in the IAB node being unable to use the secondary cell as the UE Provide return service.
  • the methods provided in the embodiments of the present application are respectively introduced from the perspective of interaction between various devices.
  • the first wireless backhaul device, the first wireless access device, and the second wireless access device may include hardware structures and/or software modules. Module, or hardware structure plus software module form to realize the above-mentioned functions. Whether a certain function of the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • an embodiment of the present application further provides an apparatus 700 for implementing the first wireless access device (for example, eNB) or the second wireless access device (for example, IAB donor base station) in the above method.
  • the device may be a software module or a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 700 may include: a processing unit 701 and a communication unit 702.
  • each functional module in each embodiment of the present application may be integrated in a processor, or may exist alone physically, or two or more modules may be integrated in one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software function modules.
  • the communication unit 702 is configured to receive a first message from a second wireless access device, where the first message includes a first control plane message and first indication information.
  • the processing unit 701 is configured to determine a first radio bearer according to the first indication information.
  • the communication unit 702 is further configured to send a second message to the first wireless backhaul device through the first radio bearer, where the second message includes the first control plane message.
  • the first indication information may directly indicate the identity of the first radio bearer.
  • the processing unit 701 can directly determine the first radio bearer according to the identity of the first radio bearer.
  • the first indication information may also indicate the first type of the first control plane message.
  • the communication unit 702 is further configured to send a configuration message to the first wireless backhaul device, where the configuration message includes a mapping relationship between the type of the control plane message and the radio bearer. In this way, the processing unit 701 can use the mapping relationship to determine the corresponding first radio bearer according to the first type of the first control plane message.
  • the processing unit 701 is configured to determine first indication information.
  • the communication unit 702 is configured to send a first message including first indication information to the first wireless access device, where the first indication information is used to determine the transmission between the first wireless access device and the first wireless backhaul device.
  • the first radio bearer corresponding to the first control plane message.
  • the first indication information is used to indicate the identity of the first radio bearer.
  • the first indication information may also indicate the first type of the first control plane message.
  • the communication unit 702 when the first indication information indicates the first type of the first control plane message, the communication unit 702 is further configured to send a configuration message to the first wireless access device, and the configuration message includes the first control plane message.
  • the mapping relationship between the first type of plane message and the first radio bearer; the configuration message is used to determine the first radio bearer corresponding to the first type of the first control plane message.
  • the first control plane message is an F1AP message on the F1 interface.
  • the communication unit 702 is configured to receive a configuration message, where the configuration message includes the correspondence between the first radio bearer and the first type of control plane message.
  • the processing unit 701 is configured to obtain a second control plane message, and according to the configuration message, determine a first radio bearer corresponding to the first type of the second control plane message.
  • the communication unit 702 is further configured to send a third message to the first wireless access device through the first radio bearer, where the third message includes the second control plane message.
  • the communication unit 702 may receive the configuration message from the first wireless access device or the second wireless access device.
  • the communication unit 702 may receive a fifth message from the first wireless access device, the fifth message includes the mapping relationship between the first IP address and the first air interface, and the communication unit 702 determines that it is related to the second control plane message. Then, according to the configuration message, determine the first radio bearer on the first air interface corresponding to the first type of the second control plane message.
  • the second control plane message is an F1AP message on the F1 interface, which is an F1AP message sent by the first wireless backhaul device to the second wireless access device.
  • the communication unit 702 is configured to receive a third message from the first wireless backhaul device through the first radio bearer, where the third message includes a second control plane message.
  • the processing unit 701 is configured to determine the second wireless access device corresponding to the destination IP address of the second control plane message in the third message.
  • the communication unit 702 is configured to send a fourth message to the second wireless access device, where the fourth message includes the second control plane message.
  • the communication unit 702 is further configured to send a configuration message to the first wireless backhaul device before receiving the third message, where the configuration message includes the first radio bearer and control plane message. Correspondence between a type. So that the first wireless backhaul device determines the first radio bearer corresponding to the first type of the second control plane message.
  • the communication unit 702 is further configured to receive a configuration message from the second wireless access device.
  • the processing unit 701 is configured to generate a configuration message, where the configuration message includes a mapping relationship between a first radio bearer and a first type of control plane message.
  • the communication unit 702 is configured to send a configuration message to the first wireless backhaul device; the configuration message is used by the first wireless backhaul device to determine the first radio bearer corresponding to the first type of the second control plane message.
  • the communication unit 702 is configured to send the configuration message to the first wireless access device; the configuration message is used to determine the second control of the transmission between the first wireless access device and the first wireless backhaul device The first radio bearer corresponding to the message.
  • the communication unit 702 is configured to receive a notification message, where the notification message includes the indication information that the first node or the cell served by the first node supports IAB node access.
  • the notification message may also include the measurement result of the second node on the serving cell of the first node.
  • the processing unit 701 is configured to determine that the first node is the secondary base station of the second node, or select a cell served by the first node as the secondary cell of the second node.
  • the communication unit 702 is configured to send a broadcast message, where the broadcast message includes indication information, and the indication information is used to indicate that the first node can support the access of the IAB node.
  • the communication unit 702 is configured to receive the broadcast message and obtain indication information from the broadcast message.
  • the communication unit 702 is further configured to send a notification message to the third node, where the notification message includes the indication information that the first node or the cell served by the first node supports IAB node access.
  • the notification message may also include the measurement result of the second node on the serving cell of the first node.
  • FIG. 8 shows a device 800 provided by an embodiment of the application, and the device shown in FIG. 8 may be a hardware circuit implementation of the device shown in FIG. 7.
  • the communication device can be applied to the flowcharts shown in FIGS. 4 to 5 to perform the functions of the first wireless access device or the second wireless access device or the first wireless backhaul device in the foregoing method embodiment.
  • FIG. 8 only shows the main components of the communication device.
  • the apparatus 800 shown in FIG. 8 includes at least one processor 820, which is configured to implement any one of the methods in FIGS. 4 to 6 provided in the embodiments of the present application.
  • the device 800 may further include at least one memory 830 for storing program instructions and/or data.
  • the memory 830 and the processor 820 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 820 may cooperate with the memory 830 to operate.
  • the processor 820 may execute program instructions stored in the memory 830. At least one of the at least one memory may be included in the processor.
  • the apparatus 800 may further include a communication interface 810 for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 800 can communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.
  • the transceiver may be an independent receiver, an independent transmitter, a transceiver with integrated transceiver functions, or an interface circuit.
  • the processor 820 uses the communication interface 810 to send and receive data, and is used to implement the method executed by the first wireless access device or the second wireless access device or the first wireless backhaul device in the embodiments corresponding to FIGS. Refer to the previous description and will not repeat it here.
  • the embodiment of the present application also provides a computer-readable storage medium on which some instructions are stored. When these instructions are invoked and executed by a computer, the computer can complete the above method embodiments and method implementations. Examples of methods involved in any one of the possible designs.
  • the computer-readable storage medium is not limited. For example, it may be RAM (random-access memory, random access memory), ROM (read-only memory, read-only memory), and so on.
  • the present application also provides a computer program product that can complete the method embodiment and the method involved in any possible design of the above method embodiment when the computer program product is invoked and executed by a computer.
  • the present application also provides a chip, which may include a processor and an interface circuit, for completing the foregoing method embodiment and any one of the possible implementations of the method embodiment.
  • a chip which may include a processor and an interface circuit, for completing the foregoing method embodiment and any one of the possible implementations of the method embodiment.
  • Method where "coupled” means that two components are directly or indirectly combined with each other. This combination can be fixed or movable. This combination can allow fluid, electricity, electrical signals or other types of signals to be connected between the two components. Communicate between the two components.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.
  • a computer-usable storage media including but not limited to disk storage, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

一种通信方法及装置，该方法包括：IAB宿主基站确定第一指示信息，然后向eNB发送第一消息，第一消息包括第一控制面消息和第一指示消息，eNB可以根据接收的第一消息中的第一指示信息确定第一无线承载，继而通过第一无线承载向IAB节点发送包括第一控制面消息的第二消息。因第一无线承载与下行F1AP消息的类型相对应，等于eNB为不同的下行F1AP消息类型选择不同的无线承载，从而为终端的业务提供有效的QoS保障。

Description

一种通信方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
第五代移动通信系统(5th-generation，5G)中引入了接入回传一体化(integrated access and backhaul，IAB)网络技术，IAB网络中的接入链路(access link)和回传链路(backhaul link)皆采用无线传输方案，避免光纤部署，从而降低部署成本，提高部署灵活性。在IAB网络中IAB宿主基站(IAB donor gNodeB，IAB DgNB)通过有线链路连接到核心网(例如，5G系统中的核心网(5G core，5GC))，然后在IAB宿主基站和终端之间增加接入回传一体化节点(integrated access and backhaul node，IAB node)，通过IAB节点的接入链路(access link，AL)为终端提供无线接入服务，且通过IAB节点的回传链路(backhaul link，BL)连接到IAB宿主基站，以传输终端的业务数据。
在回传链路中，终端产生的无线承载(例如，数据无线承载(data radio bearer，DRB)和/或信令无线承载(signaling radio bearer，SRB))，将映射在逻辑信道(logical channel，LCH)上进行传输。目前，对于非独立(non-standalone,NSA)组网的IAB网络，IAB节点和IAB宿主基站之间的F1接口上的F1应用层协议(F1application protocol，F1AP)消息除了基于回传链路进行传输，IAB宿主基站还可以采用长期演进(long term evolution，LTE)系统的空口向IAB节点传输该F1AP消息，但是上述F1AP消息通过LTE链路进行传输的方法无法为终端的业务提供有效的服务质量(quality of service，QoS)保障，即终端的QoS需求难以保证，因此该方法可能会导致终端业务不连续。
发明内容
本申请提供一种通信方法及装置，该方法能够为终端提供QoS保障，保证终端业务的连续性。
第一方面，提供一种通信方法，该方法包括：在第一无线接入设备和第二无线接入设备均与第一无线回传设备连接的网络架构下，第一无线接入设备从第二无线接入设备接收第一消息，该第一消息包括第一控制面消息以及第一指示信息。然后第一无线接入设备根据第一指示信息确定第一无线承载。继而第一无线接入设备通过第一无线承载向第一无线回传设备发送包括第一控制面消息的第二消息。
本申请实施例中，第一无线接入设备和第二无线接入设备可以为不同通信制式的无线接入设备，例如第一无线接入设备为eNB，第二无线接入设备为IAB宿主基站，第一无线回传设备为IAB节点，第一控制面消息可以为下行F1AP消息。eNB可以根据IAB宿主基站所指示的第一指示信息，确定用于承载下行F1AP消息的第一无线承载，以实现为不同的下行F1AP消息类型选择不同的无线承载，从而为终端的业务提供有效的QoS保障。
在一种可能的设计中，第一无线承载为所述第一无线回传设备与所述第一无线接入设备之间的SRB。第一指示信息可以用于指示第一无线承载的标识。换句话说，IAB宿主基 站直接向eNB发送用于指示第一无线承载的标识的第一指示信息，eNB可以直接根据第一无线承载的标识确定出第一无线承载。本申请实施例中，IAB宿主基站通过发送第一指示信息，便于eNB快速确定与F1AP消息对应的第一无线承载，该方法信令开销小。
在一种可能的设计中，第一指示信息可以用于指示第一控制面消息的第一类型。在该情况下，第二无线接入设备还需要从第二无线接入设备接收配置消息，配置消息中包括第一控制面消息的第一类型和第一无线承载之间的映射关系。从而第一无线接入设备根据配置消息和第一指示信息，确定与第一控制面消息的第一类型对应的第一无线承载。本申请实施例中，IAB宿主基站通过发送第一指示信息，便于eNB快速确定与F1AP消息对应的第一无线承载。
第二方面，提供一种通信方法，该方法包括：在第一无线接入设备和第二无线接入设备均与第一无线回传设备连接的网络架构下，第二无线接入设备确定第一指示信息，然后向第一无线接入设备发送包括第一指示信息的第一消息，第一指示信息用于确定第一无线接入设备与第一无线回传设备之间传输的所述第一控制面消息对应的第一无线承载。
本申请实施例中，第一无线接入设备和第二无线接入设备可以为不同通信制式的无线接入设备，例如第一无线接入设备为eNB，第二无线接入设备为IAB宿主基站，第一无线回传设备为IAB节点，第一控制面消息可以为下行F1AP消息。IAB宿主基站向eNB发送第一指示信息，eNB根据第一指示信息确定用于承载下行F1AP消息的第一无线承载，以实现为不同的下行F1AP消息类型选择不同的无线承载，从而为终端的业务提供有效的QoS保障。
在一种可能的设计中，第一无线承载为所述第一无线回传设备与所述第一无线接入设备之间的SRB。第一指示信息可以用于指示第一无线承载的标识。换句话说，IAB宿主基站直接向eNB发送用于指示第一无线承载的标识的第一指示信息，eNB可以直接根据第一无线承载的标识确定出第一无线承载。本申请实施例中，IAB宿主基站通过发送第一指示信息，便于eNB快速确定与F1AP消息对应的第一无线承载，该方法信令开销小。
在一种可能的设计中，第一指示信息可以用于指示第一控制面消息的第一类型。在该情况下，第二无线接入设备还需要从第二无线接入设备接收配置消息，配置消息中包括第一控制面消息的第一类型和第一无线承载之间的映射关系。从而第一无线接入设备根据配置消息和第一指示信息，确定与第一控制面消息的第一类型对应的第一无线承载。本申请实施例中，IAB宿主基站通过发送第一指示信息，便于eNB快速确定与F1AP消息对应的第一无线承载。
第三方面，提供一种通信方法，该方法包括：在第一无线接入设备和第二无线接入设备均与第一无线回传设备连接的网络架构下，第一无线回传设备接收配置消息，该配置消息包括第一无线承载和控制面消息的第一类型之间的对应关系。第一无线回传设备获取第二控制面消息，其中，第二控制面消息的类型为第一类型，第一无线回传设备根据配置消息，确定与第二控制面消息的第一类型对应的第一无线承载；然后通过第一无线承载向第一无线接入设备发送包括第二控制面消息的第三消息。
本申请实施例中，第一无线接入设备和第二无线接入设备可以为不同通信制式的无线接入设备，例如第一无线接入设备为eNB，第二无线接入设备为IAB宿主基站，第一无线回传设备为IAB节点，第二控制面消息可以为上行F1AP消息，第一无线承载为所述第一无线回传设备与所述第一无线接入设备之间的SRB。IAB节点可以根据IAB宿主基站所发 送的配置消息中的映射关系，确定用于承载第一类型的上行F1AP消息的第一无线承载，以实现为不同的上行F1AP消息类型选择不同的无线承载，从而为终端的业务提供有效的QoS保障。
在一种可能的设计中，第一无线回传设备从第二无线接入设备接收配置消息。或者，第一无线回传设备从第一无线接入设备接收配置消息。可选地，第一无线接入设备中的配置消息可以从第二接入设备获取。
在一种可能的设计中，第一无线回传设备还可以从第一无线接入网设备接收第五消息，第五消息包括第一IP地址与第一空口的映射关系。第一无线回传设备获取第二控制面消息之后，确定与第二控制面消息中的第一IP地址对应的空口为第一空口，第一空口为所述第一无线回传设备和第一无线接入网设备之间的空口，继而第一无线回传设备确定第一空口上的第一无线承载。换句话说，第一无线设备在确定通过第一空口(例如LTE空口)传输F1AP消息时，利用配置消息中映射关系确定第一无线承载。
第四方面，提供一种通信方法，该方法包括：在第一无线接入设备和第二无线接入设备均与第一无线回传设备连接的网络架构下，第一无线接入设备通过第一无线承载从第一无线回传设备接收包括第二控制面消息的第三消息，然后向第二无线接入网设备发送包括第二控制面消息的第四消息，以便于第一无线接入设备将第四消息中的第二控制面消息发送至第二无线接入设备。
本申请实施例中，第一无线接入设备和第二无线接入设备可以为不同通信制式的无线接入设备，例如第一无线接入设备为eNB，第二无线接入设备为IAB宿主基站，第一无线回传设备为IAB节点，第二控制面消息可以为上行F1AP消息，第一无线承载为所述第一无线回传设备与所述第一无线接入设备之间的SRB。IAB节点可以根据IAB宿主基站所发送的配置消息中的映射关系，确定用于承载第一类型的上行F1AP消息的第一无线承载，以实现为不同的上行F1AP消息类型选择不同的无线承载，从而为终端的业务提供有效的QoS保障。
在一种可能的实现中，在接收第三消息之前，第一无线接入网设备向第一无线回传设备发送配置消息，该配置消息包括无线承载和第二控制面消息的第一类型之间的映射关系。继而第一无线回传设备可以根据该映射关系确定出第一无线承载。
在一种可能的实现中，第一无线接入网设备可以预先从第二无线接入网设备获取该配置消息。
第五方面，提供一种通信方法，该方法包括：在第一无线接入设备和第二无线接入设备均与第一无线回传设备连接的网络架构下，第二无线接入网设备生成配置消息，所述配置消息包括第一无线承载和控制面消息的第一类型之间的对应关系，然后第二无线接入网设备向第一无线回传设备或第一无线接入设备发送该配置消息。
本申请实施例中，当第二无线接入网设备向第一无线回传设备发送该配置消息后，第一无线回传设备可以根据配置消息中的映射关系确定出第一无线承载，以实现为不同的上行F1AP消息类型选择不同的无线承载，从而为终端的业务提供有效的QoS保障。当第二无线接入网设备向第一无线接入设备发送该配置消息后，第一无线接入设备可以将该配置消息转发至第一无线回传设备，继而第一无线回传设备可以根据配置消息中的映射关系确定出第一无线承载，以实现为不同的上行F1AP消息类型选择不同的无线承载，从而为终端的业务提供有效的QoS保障。
第六方面，提供一种通信方法，该方法包括：第一节点发送广播消息，其中该广播消息中包括指示信息，该指示信息用于指示第一节点能够支持IAB节点的接入。当第二节点接收到该广播消息之后，从该广播消息中获取指示信息，确定第一节点支持IAB节点的接入。然后第二节向第三节点发送通知消息，其中该通知消息包括第一节点或者第一节点服务的小区支持IAB节点接入的指示信息。第三节点确定第一节点为第二节点的辅基站，或者选择第一节点服务的小区为第二节点的辅小区。
本申请实施例中，IAB节点的主服务基站，可以为IAB节点选择支持IAB接入的辅基站，避免选择的辅基站无法支持IAB节点的接入，导致IAB节点无法利用辅小区为UE提供回传服务。
第七方面，本申请实施例提供一种通信装置，所述通信装置包括处理器，所述处理器与存储器耦合，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，以执行上述第一方面或第一方面中任一种可能的设计中的方法。可选的，所述通信装置还可以包括所述存储器。可选的，所述通信装置还可以包括收发器，用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的，该通信装置可以是第一无线接入设备，也可以是第一无线接入设备中的装置，如芯片或者芯片系统，其中所述芯片系统包含至少一个芯片，所述芯片系统还可以包括其他电路结构和/或分立器件。
第八方面，提供一种通信装置，该装置可以是第一无线接入设备，也可以是第一无线接入设备中的装置，或者是能够和第一无线接入设备匹配使用的装置。一种设计中，该装置可以包括执行各个方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。示例性地，该装置可以包括收发模块和处理模块，且收发模块和处理模块可以执行上述第一方面任一种设计示例中的相应功能，关于收发模块和处理模块的功能可参考第一方面的记载，在此不再一一说明。
第九方面，本申请实施例提供一种通信装置，所述通信装置包括处理器，所述处理器与存储器耦合，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，以执行上述第二方面或第二方面中任一种可能的设计中的方法。可选的，所述通信装置还可以包括所述存储器。可选的，所述通信装置还可以包括收发器，用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的，该通信装置可以是第二无线接入设备，也可以是第二无线接入设备中的装置，如芯片或者芯片系统，其中所述芯片系统包含至少一个芯片，所述芯片系统还可以包括其他电路结构和/或分立器件。
第十方面，提供一种通信装置，该装置可以是第二无线接入设备，也可以是第二无线接入设备中的装置，或者是能够和第二无线接入设备匹配使用的装置。一种设计中，该装置可以包括执行各个方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。示例性地，该装置可以包括收发模块和处理模块，且收发模块和处理模块可以执行上述第二方面任一种设计示例中的相应功能，关于收发模块和处理模块的功能可参考第二方面的记载，在此不再一一说明。
第十一方面，本申请实施例提供一种通信装置，所述通信装置包括处理器，所述处理器与存储器耦合，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，以执行上述第三方面或第三方面中任一种可能的设计中的方法。可选的，所述通信装置还可以包括所述存储器。可选的，所述通信装置还可以包括收发器，用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的，该通信装置可以是第一无线回传设备，也 可以是第一无线回传设备中的装置，如芯片或者芯片系统，其中所述芯片系统包含至少一个芯片，所述芯片系统还可以包括其他电路结构和/或分立器件。
第十二方面，提供一种通信装置，该装置可以是第一无线回传设备，也可以是第一无线回传设备中的装置，或者是能够和第一无线回传设备匹配使用的装置。一种设计中，该装置可以包括执行各个方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。示例性地，该装置可以包括收发模块和处理模块，且收发模块和处理模块可以执行上述第三方面任一种设计示例中的相应功能，关于收发模块和处理模块的功能可参考第三方面的记载，在此不再一一说明。
第十三方面，本申请实施例提供一种通信装置，所述通信装置包括处理器，所述处理器与存储器耦合，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，以执行上述第四方面或第四方面中任一种可能的设计中的方法。可选的，所述通信装置还可以包括所述存储器。可选的，所述通信装置还可以包括收发器，用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的，该通信装置可以是第一无线接入设备，也可以是第一无线接入设备中的装置，如芯片或者芯片系统，其中所述芯片系统包含至少一个芯片，所述芯片系统还可以包括其他电路结构和/或分立器件。
第十四方面，提供一种通信装置，该装置可以是第一无线接入设备，也可以是第一无线接入设备中的装置，或者是能够和第一无线接入设备匹配使用的装置。一种设计中，该装置可以包括执行各个方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。示例性地，该装置可以包括收发模块和处理模块，且收发模块和处理模块可以执行上述第四方面任一种设计示例中的相应功能，关于收发模块和处理模块的功能可参考第四方面的记载，在此不再一一说明。
第十五方面，本申请实施例提供一种通信装置，所述通信装置包括处理器，所述处理器与存储器耦合，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，以执行上述第五方面或第五方面中任一种可能的设计中的方法。可选的，所述通信装置还可以包括所述存储器。可选的，所述通信装置还可以包括收发器，用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的，该通信装置可以是第二无线接入设备，也可以是第二无线接入设备中的装置，如芯片或者芯片系统，其中所述芯片系统包含至少一个芯片，所述芯片系统还可以包括其他电路结构和/或分立器件。
第十六方面，提供一种通信装置，该装置可以是第二无线接入设备，也可以是第二无线接入设备中的装置，或者是能够和第二无线接入设备匹配使用的装置。一种设计中，该装置可以包括执行第五方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。示例性地，该装置可以包括收发模块和处理模块，且收发模块和处理模块可以执行上述第五方面任一种设计示例中的相应功能，关于收发模块和处理模块的功能可参考第五方面的记载，在此不再一一说明。
第十七方面，本申请实施例提供一种通信装置，所述通信装置包括处理器，所述处理器与存储器耦合，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，以执行上述第六方面或第六方面中任一种可能的设计中的方法。可选的，所述通信装置还可以包括所述存储器。可选的，所述通信装置还可以包括收发器，用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的，该通信装置可以是第二节点，也可以是第二节点中的装置，如芯片或者芯片系统，其中所述芯片系统包含至少一个芯片，所述芯片 系统还可以包括其他电路结构和/或分立器件。
第十八方面，提供一种通信装置，该装置可以是第二节点，也可以是第二节点中的装置，或者是能够和第二节点匹配使用的装置。一种设计中，该装置可以包括执行第五方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。示例性地，该装置可以包括收发模块和处理模块，且收发模块和处理模块可以执行上述第六方面任一种设计示例中的相应功能，关于收发模块和处理模块的功能可参考第六方面的记载，在此不再一一说明。
第十九方面，本申请实施例提供一种装置，所述装置包括处理器，用于实现上述第一方面描述的方法，或者用于实现上述第二方面描述的方法。所述装置还可以包括存储器，用于存储指令和/或数据。所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的程序指令时，可以实现上述第一方面描述的方法，或者可以实现上述第二方面描述的方法。所述装置还可以包括通信接口，所述通信接口用于该装置与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块、管脚或其它类型的通信接口，其它设备可以为网络设备等。在一种可能的实现中，若装置用于实现上述第一方面描述的方法，该装置包括：
存储器，用于存储程序指令；
通信接口，用于从第二无线接入设备接收第一消息，该第一消息包括第一控制面消息以及第一指示信息。
处理器，用于根据第一指示信息确定第一无线承载。
通信接口，还用于通过第一无线承载向第一无线回传设备发送包括第一控制面消息的第二消息。
在一种可能的实现中，若装置用于实现上述第二方面描述的方法，该装置包括：
存储器，用于存储程序指令；
通信接口，用于从第二无线接入设备接收第一消息，该第一消息包括第一控制面消息以及第一指示信息。
处理器，用于确定第一指示信息。
通信接口，还用于向第一无线接入设备发送包括第一指示信息的第一消息。
所述处理器和通信接口的功能和有益效果，可以参考第一方面的记载或参考第二方面的记载，这里不再赘述。
第二十方面，本申请实施例提供一种装置，所述装置包括处理器，用于实现上述第三方面描述的方法，或用于实现上述第四方面描述的方法，或用于实现上述第五方面描述的方法。所述装置还可以包括存储器，用于存储指令和/或数据。所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的程序指令时，可以实现上述第二方面描述的方法，或可以实现上述第四方面描述的方法，用于实现上述第五方面描述的方法。所述装置还可以包括通信接口，所述通信接口用于该装置与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块、管脚或其它类型的通信接口，其它设备可以为终端设备等。在一种可能的实现中，若装置用于实现上述第三方面描述的方法，该装置包括：
该装置包括：
存储器，用于存储程序指令；
通信接口，用于接收配置消息，该配置消息包括第一无线承载和控制面消息的第一类 型之间的对应关系；
处理器，用于获取第二控制面消息，其中，第二控制面消息的类型为第一类型，第一无线回传设备根据配置消息，确定与第二控制面消息的第一类型对应的第一无线承载。
通信接口，用于通过第一无线承载向第一无线接入设备发送包括第二控制面消息的第三消息。
若装置用于实现上述第四方面描述的方法，该装置包括：
该装置包括：
存储器，用于存储程序指令。
通信接口，通过第一无线承载从第一无线回传设备接收包括第二控制面消息的第三消息。
处理器，用于根据第二控制面消息的目的地址确定第二无线接入设备。
通信接口，向第二无线接入网设备发送包括第二控制面消息的第四消息，以便于第一无线接入设备将第四消息中的第二控制面消息发送至第二无线接入设备。
若装置用于实现上述第五方面描述的方法，该装置包括：
该装置包括：
存储器，用于存储程序指令；
处理器，生成配置消息，所述配置消息包括第一无线承载和控制面消息的第一类型之间的对应关系。
通信接口，向第一无线回传设备或第一无线接入设备发送该配置消息。
所述处理器和通信接口的功能和有益效果，可以参考第三方面的记载，或者可以参考第四方面的记载，或者可以参考第五方面的记载，这里不再赘述。
第二十一方面，本申请实施例还提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行第一方面、第一方面任一种可能设计、第二方面或第二方面任一种可能设计的方法、第三方面或第三方面任一种可能设计的方法、第四方面或第四方面任一种可能设计的方法，第五方面或第五方面任一种可能设计的方法，第六方面或第六方面任一种可能设计的方法。
第二十二方面，本申请实施例还提供一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现第一方面、第一方面任一种可能设计、第二方面或第二方面任一种可能设计的方法、第三方面或第三方面任一种可能设计的方法、第四方面或第四方面任一种可能设计的方法，第五方面或第五方面任一种可能设计的方法，第六方面或第六方面任一种可能设计的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第二十三方面，本申请实施例中还提供一种计算机程序产品，包括指令，当其在计算机上运行时，使得计算机执行第一方面、第一方面任一种可能设计、第二方面或第二方面任一种可能设计的方法、第三方面或第三方面任一种可能设计的方法、第四方面或第四方面任一种可能设计的方法，第五方面或第五方面任一种可能设计的方法，第六方面或第六方面任一种可能设计的方法。
第二十四方面，本申请实施例提供了一种系统，所述系统包括第六方面或者第六方面所述的装置至第二十方面或第二十方面所述的装置。
附图说明
图1A至图1B为本申请实施例提供的一种网络架构示意图；
图2A至图2B为本申请实施例提供的另一种网络架构示意图；
图3(a)至3(d)为本申请实施例提供的一种协议栈结构示意图；
图4为本申请实施例提供的第一种通信方法流程示意图；
图5为本申请实施例提供的第二种通信方法流程示意图；
图6为本申请实施例提供的另一种通信方法流程示意图；
图7为本申请实施例提供的一种通信装置结构示意图；
图8为本申请实施例提供的一种通信装置结构示意图。
具体实施方式
下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例可以应用于各种移动通信系统，例如：新无线(new radio，NR)系统、长期演进(long term evolution，LTE)系统、先进的长期演进(advanced long term evolution，LTE-A)系统、演进的长期演进(evolved long term evolution，eLTE)系统、未来通信系统等其它通信系统，具体的，在此不做限制。
为便于理解本申请实施例，首先以图1A中示出的通信系统为例详细说明适用于本申请实施例的通信系统。图1A示出了适用于本申请实施例的通信方法的通信系统的示意图。如图1A所示，该通信系统包括分IAB宿主基站、IAB节点以及终端侧设备。图1B为图1A所示的通信系统的另一种表达形式，实质表达的含义一致，在此不再重复赘述。
另外，在图1A和图1B中，还示出了设备之间的接口名称，例如终端侧设备与IAB节点之间的无线接口(图中命名为NR Uu接口)以及IAB节点与IAB宿主基站之间的无线接口(可以被称为NR无线回传接口，由于该接口同样基于NR Uu接口协议进行通信，故在图中命名为NR Uu接口)，这些接口的名称只是示例，并不代表对接口的限定，当通信系统版本变更时，相应的名称也可以用其他无线通信网络中的对应功能的名称进行替代。
图1A所示的IAB网络支持多跳组网，例如在图1A和图1B所示的IAB节点和IAB宿主基站之间，还可以有一个或多个中间IAB节点。
图1A所示的IAB网络不仅支持多跳组网，还可以支持多连接组网。在由IAB节点服务的终端侧设备和IAB宿主之间，可以存在至少一条由多段链路组成的传输路径。在IAB节点和IAB宿主之间，也可以存在一条或者多条传输路径，每条传输路径上可以有一个或者多个IAB节点。在一条传输路径上，每个IAB节点将为其提供接入和回传服务的邻节点视为父节点，相应地，每个IAB节点可视为其父节点的子节点。例如，在图1A和图1B所示的场景中，IAB节点的父节点为IAB宿主，IAB宿主将IAB节点视为子节点。
需要说明的是，图1A所示的IAB组网场景仅仅是示例性的，在多跳和多连接结合的IAB场景中，还可能存在其他连接形式。例如，本申请还可以应用于双连接的场景，具体可以如图2A所示。图2A示出了E-UTRAN和NR双连接(E-UTRAN NR Dual Connectivity，EN-DC)系统的网络架构示意图。如图2A所示，该通信系统包括分组数据核心网(evolved packet core，EPC)设备、LTE系统的基站(eNB)、IAB宿主、IAB节点以及终端侧设备。图2A所示的EN-DC组网方式也可以被称为IAB网络的非独立(non-standalone,NSA)组网。图2B为图2A所示的通信系统的另一种表达形式，实质表达的含义一致，在此不再重复赘述。
图2A中，LTE系统的基站(图中为eNB)为主基站(因此也可以称为Master eNB，简称为MeNB)，为IAB节点提供LTE的空口(LTE Uu)连接，并与核心网EPC通过S1接口进行用户面数据传输和控制面数据传输。IAB宿主基站为辅基站，为IAB节点提供NR的空口(NR Uu)连接，并与核心网EPC通过S1接口进行用户面数据传输。类似的，终端侧设备也支持双连接，UE通过LTE Uu接口连接到主基站(eNB)，通过NR Uu接口连接到辅基站(IAB节点，或IAB宿主基站)。
需要说明的是，图2A仅为组网示例，IAB网络的NSA组网也同样支持多跳IAB组网，例如图2A和图2B中的终端设备可以通过两个或两个以上IAB节点连接至IAB宿主基站，即IAB节点可以通过多跳回传链路连接到IAB宿主基站。IAB网络的NSA组网也同样支持单跳IAB组网，例如图2A和图2B中的终端设备可以通过一个IAB节点连接至IAB宿主基站。另外，IAB节点在连接到eNB时，通过一跳LTE链路与eNB通信。
另外，需要说明的是，本申请适用的双连接的场景不仅可以是图2A和图2B所示的EN-DC组网场景，还可以是由IAB网络和IAB网络组成的双连接，或者由IAB网络和其它未来通信系统之间的连接，上述示例并不构成对场景的限定。
本申请实施例还可以将IAB节点称为中继节点(relay node，RN)，为了描述方便，以下均称为IAB节点。IAB节点可以包括至少一个移动终端(mobile terminal，MT)单元以及至少一个分布式单元(distributed unit，DU)，图1A以及图2A中，仅以IAB节点包括一个MT单元和DU为例进行描述。IAB节点中的MT单元实现所述IAB作为终端来与IAB节点的父节点及IAB宿主节点进行通信，具有用户设备(user equipment，UE)的功能。IAB节点中的DU，为其下附着的终端侧设备或者其他IAB节点提供接入服务，也可以与IAB宿主节点基于F1接口进行通信。其中，IAB节点中的MT，也可以称为IAB节点中的MT功能实体，IAB节点中的DU，也可以称为IAB节点中的DU功能实体。为描述方便，IAB节点中的MT以及IAB节点中的MT功能实体均简称为“IAB节点MT”，IAB节点中的DU以及IAB节点中的DU功能实体均简称为“IAB节点DU”。IAB节点可以为终端侧设备提供无线接入服务，该终端侧设备的业务数据或控制信息由IAB节点通过无线回传链路连接到IAB宿主(IAB donor)或者网络侧设备进行传输。
IAB宿主可以是一个具有完整基站功能的接入网网元，也可以是集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)分离形态的接入网网元。其中，IAB宿主中的CU，也可以称为IAB宿主中的CU功能实体，IAB宿主中的DU，也可以称为IAB宿主中的DU功能实体。
为便于表述，本申请实施例中，将IAB宿主中的CU以及IAB宿主中的CU功能实体简称为IAB宿主CU(又称IAB-donor-CU)，将IAB宿主中的DU以及IAB宿主中的DU功能实体简称为IAB宿主DU(又称IAB-donor-DU)，其中，IAB宿主CU还有可能是控制面(control plane，CP)和用户面(user plane，UP)分离的形态，例如，一个IAB宿主CU由一个CU-CP(又称IAB-donor-CU-CP)和多个CU-UP(又称IAB-donor-CU-UP)组成，本申请实施例对此不作限定。
本申请实施例涉及的F1接口，为在IAB节点的DU与IAB宿主基站之间的接口，或IAB节点的DU与IAB宿主基站的CU之间的接口，或IAB节与IAB宿主基站之间的接口，F1接口也可以被称为F1*接口等名称，为了描述方便，本申请实施例中，可统一称为F1接口，但对名称并不做限定。
需要说明的是，F1接口，还可能为一个设备内部的功能实体之间的接口，例如对于包括DU和CU的基站，F1接口可以为该基站内的DU与该基站内的CU之间的接口。
本申请实施例涉及的F1接口，F1接口支持用户面协议和控制面协议。示例性的，如图3(a)所示，为本申请实施例提供的一种用户面协议的协议栈示意图。图3(a)中，以终端侧设备至IAB宿主之间的链路中包括终端侧设备、IAB节点2、IAB节点1、IAB宿主为例进行描述。其中IAB宿主由IAB宿主DU(IAB-donor-DU)和IAB宿主CU(IAB-donor-CU)，IAB宿主CU包括IAB宿主CU的控制面功能单元(IAB-donor-CU-CP)和用户面功能单元(IAB-donor-CU-UP)。由于图3(a)为用户面协议栈示例，故IAB只显示了IAB-donor-CU-UP部分，相应的，图3(b)的控制面协议栈中仅示出了IAB-donor-CU-CP部分。
图3(a)中，终端侧设备与IAB宿主之间对等的协议层包括服务数据应用协议(Service Data Adaptation Protocol，SDAP)层以及分组数据汇聚协议(packet data convergence protocol，PDCP)层。终端侧设备与IAB节点2之间对等的协议包括无线链路控制(radio link control，RLC)层、媒体接入控制(medium access control，MAC)层以及物理(Physical，PHY)层。
IAB节点2与IAB宿主之间在F1接口的用户面，对等的协议包括通用分组无线服务(General Packet Radio Service，GPRS)隧道协议用户面(GPRS Tunnelling Protocol User Plane，GTP-U)层、用户数据报协议(user datagram protocol，UDP)层以及互联网协议(internet protocol，IP)层。可选的，F1接口的用户面协议层还包括PDCP层和/或IP安全(IP Security，简称IPsec)层。在一种可能的实现方式中，IPsec层或PDCP层位于IP层之上GTP-U层之下。
IAB节点2与IAB节点1之间对等的协议层包括回传适配协议(Backhaul Adaptation Protocol，BAP)层、RLC层、MAC层以及PHY层。相应的，IAB节点1与IAB宿主之间对等的协议包括BAP层、RLC层、MAC层以及PHY层。
结合图3(a)，示例性的，如图3(b)所示，为本申请实施例提供的一种控制面协议的协议栈示意图。
图3(b)中，终端侧设备与IAB宿主之间对等的协议包括无线资源控制(radio resource control，RRC)层以及PDCP层。终端侧设备与IAB节点2之间对等的协议包括RLC层、MAC层以及PHY层。
IAB节点2与IAB宿主之间在F1接口的控制面，对等的协议包括F1应用层协议(F1application protocol，F1AP)层、流控传输协议(stream control transport protocol，SCTP)层以及IP层。可选的，F1接口的控制面协议层还包括PDCP层、IPsec层和数据报文传输层安全(datagram transport layer security，简称DTLS)层中的一个或多个。在一种可能的实现方式中，IPsec层、PDCP层或DTLS层位于IP层之上F1AP层之下。
IAB节点2与IAB节点1之间对等的协议包括BAP层、RLC层、MAC层以及PHY层。相应的，IAB节点1与IAB宿主之间对等的协议包括BAP层、RLC层、MAC层以及PHY层。
BAP层具备以下能力中的至少一种：为数据包添加能被无线回传节点识别出的路由信息(Routing information)、基于所述能被无线回传节点识别出的路由信息执行路由选择、为数据包添加能被无线回传节点识别出的与服务质量(quality of service，简称QoS)需求 相关的标识信息、为数据包执行在包含无线回传节点的多段链路上的QoS映射、为数据包添加数据包类型指示信息、向具有流量控制能力的节点发送流控反馈信息、向子节点发送回传链路失败指示信息。需要说明的是，具备这些能力的协议层的名称不一定为BAP层，本领域技术人员可以理解，只要具备这些能力的协议层均可以理解为本申请实施例中的BAP层。
其中，所述能被无线回传节点识别出的路由信息可以是终端的标识，终端接入的IAB节点的标识，宿主节点的标识，Donor-DU的标识，Donor-CU的标识，传输路径的标识等信息中的一种或多种。
所述与QoS需求相关的标识信息可以为终端的QoS流的标识(Qos flow identifier，简称QFI)，终端的RB的标识，差分服务代码点(differentiated services code point，简称DSCP)，互联网协议版本6(internet protocol version 6，简称IPv6)的IP数据包的包头中的流标签(flow label)，通信分类(traffic class)字段中的部分比特(例如最高位的6比特)等。
所述多段链路上的QoS映射可以为：在无线回传链路中基于数据包携带的映射标识信息(例如终端的RB的标识，数据包携带的控制面消息类型，或者数据包头信息中的DSCP，IPv6报文头信息中的flow label，通信分类字段中的部分或全部比特，数据包中携带的目标IP地址和/或GTP隧道端点标识(Tunnel endpoint identifier，TEID)等)，执行从终端的RB到无线回传链路上的RLC承载或RLC信道或逻辑信道的映射；基于入口链路和出口链路的RB、RLC承载、RLC信道和逻辑信道中的任意两个或更多个之间的对应关系，执行从入口链路的RB或RLC承载或RLC信道或逻辑信道，到出口链路的RB或RLC承载或RLC信道或逻辑信道的映射。
所述数据包类型指示信息可以用于指示BAP层中封装的内容包含的是以下类型中的任一种或多种：终端的用户面数据、终端的RRC消息、IAB节点的RRC消息、IAB节点与宿主节点(或Donor-CU或CU-CP)之间接口上的控制层应用消息(例如F1AP消息)、IAB节点生成的流控反馈消息、IAB节点生成的头压缩反馈消息、BAP层的数据PDU、BAP层的控制PDU等。
示例性的，具有流量控制能力的节点可以为宿主节点、Donor-DU、Donor-CU、IAB节点的父节点等为IAB节点提供回传服务的节点。流控反馈信息的内容可包含如下信息中的一种或多种：IAB节点的缓存状态、负载程度，包含IAB节点的某段链路的状态(如链路阻塞(blockage)或链路恢复(resume)或链路质量信息等)，包含IAB节点的某段链路的带宽、传输时延，IAB节点丢失的数据包序号，IAB节点已经成功向终端或其子节点发送的数据包序号等。
另外，一种可能的情况，BAP层的功能还可以通过在层2包含的任意一个层(例如，RLC层、MAC层、PDCP层等)或任意多个层的功能上扩展，无需额外的协议层。
需要说明的是，上面描述的协议层的功能以及作用，可以参考已有标准中的描述，在此不再赘述。
需要说明的是，IAB节点MT可以具有UE的协议栈，与IAB宿主之间和父节点之间的通信协议栈，可以参考图3(a)和图3(b)中的UE的协议栈进行理解。这种情况下，IAB节点也可有RRC层，可以与IAB宿主之间建立RRC连接，基于RRC层进行通信。
图3(a)和3(b)是独立组网架构的协议图示例图，对于ENDC的组网场景，IAB节点和IAB宿主之间的用户面协议栈可以参考图3(a)，控制面协议的协议栈有两种方式， 一种方式可以参考图是3(b)，还有一种方式可以参考图3(c)和图3(d)所示的协议栈图(即F1AP消息通过LTE链路传输)。图3(c)中的F1AP消息将先被封装在NR制式的RRC消息中，然后在将由LTE的空口和X2接口传输，图3(d)相较于图3(c)的差异在于，无需进行NR RRC的封装。
图3(c)和图3(d)的协议栈示意图，是为了便于理解如何在X2接口和LTE空口传输AB节点的F1AP消息，事实上，在IAB节点和MeNB之间的LTE空口以及MeNB和IAB宿主之间的X2接口还包含其他协议层，在图中并未示出。例如，在LTE空口的RLC层之下，还包含IAB节点和MeNB节点之间对等的MAC层，以及对等的PHY层；在X2接口还包括MeNB和IAB宿主之间对等的有线连接的链路层(Layer 2，L2)和物理层(Layer1，L1)，可选的，在X2接口还可以包括用于对X2AP进行安全保护的协议层，例如在X2AP和IP层之间包括DTLS层、或者IPsec协议层等。
可以理解的是，本申请实施例图3(a)至图3(d)中所示的IAB网络中的协议栈架构仅仅是一种示例，本申请实施例提供的方法并不依赖于该示例，而是通过该示例使得本申请实施例提供的方法更加的容易理解。
在本申请实施例中，终端侧设备，为具有无线收发功能的设备或可设置于该设备的芯片。其中，所述具有无线收发功能的设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、远方站、远程终端、移动设备、用户终端、用户代理或用户装置。在实际应用中，本申请的实施例中的终端侧设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、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)中的无线终端等等。本申请的实施例对应用场景不做限定。本申请中将前述具有无线收发功能的设备及可设置于该设备中的芯片统称为终端侧设备。
在本申请实施例中，网络侧设备可以为各种制式下无线接入设备，例如演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)或节点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)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission and reception point，TRP或者transmission point，TP)等，还可以为5G(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)，或在集中式-分布式(central unit-distributed,CU-DU)架构下的DU等。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请实施例中部分场景以无线通信网络中IAB的场景为例进行说明，应当指出的是， 本申请实施例中的方案还可以应用于其他无线通信网络中，相应的名称也可以用其他无线通信网络中的对应功能的名称进行替代。
本申请实施例提供的通信方法涉及下行F1AP消息传输和上行F1AP消息传输这两个场景，下面将针对两个场景分别描述。
场景一
本申请实施例中，在NSA组网场景下，即第一无线接入设备和第二无线接入设备均与第一无线回传设备连接，第二无线接入设备可以向第一无线接入设备发送第一消息。因第一消息包括第一控制面消息以及第一指示信息，所以第一无线接入设备可以根据第一指示信息确定第一无线承载，然后通过第一无线承载向第一无线回传设备发送包括第一控制面消息的第二消息。其中，第一控制面消息可以是F1接口上的控制面消息(例如下行F1AP消息)。第一无线承载可以是第一无线接入设备和第一无线回传设备之间的SRB(例如LTE空口上的SRB0或SRB1或SRB2)。
也就是说，第二无线接入设备可以在第一指示信息中指示不同消息类型的下行F1AP消息对应的无线承载，以便第一接入网设备在传输下行F1AP消息时通过对应的无线承载传输，为终端的业务提供有效的QoS保障。
本申请实施例中，第一无线接入设备和第二无线接入设备的通信制式可以不同，例如，第一无线接入设备可以为图2A中的主基站(eNB)，第二无线接入设备可以为图2B中的辅基站(IAB宿主基站)，第一无线回传设备可以为图2A中的IAB节点(或者IAB节点的MT功能实体)。在一种可能的情况下，若IAB宿主基站为CU-DU分离的形态，第二无线接入设备可以是IAB宿主基站中的CU功能实体。在另一种可能的情况下，若IAB宿主基站中的CU包括控制面(CP)功能实体和用户名(UP)功能实体，则第二无线接入设备可以为IAB宿主基站中的CU-CP功能实体。若第二无线接入设备为图2B中的辅基站(IAB宿主基站)，那么第二无线接入设备可以直接与第一无线回传设备连接，第二无线接入设备也可以先连接至其它无线回传设备，其它无线回传设备再连接至第一无线回传设备，也就是说，第二无线接入设备支持单跳或多跳连接至第一无线回传设备。若第二无线接入设备为IAB-donor-CU或者IAB-donor-CU-CP，那么第二无线接入设备可以通过IAB-donor-DU与第一无线回传设备连接，或者可以通过IAB-donor-DU以及一个或者多个其他无线回传设备与第一无线回传设备连接。
下面以第一无线回传设备为图2A中的IAB节点，第一无线接入设备为图2A中的LTE系统的eNB，第二无线接入设备为图2A中的IAB宿主基站为例进行描述，需要说明的是，图4中的IAB宿主基站还可以被替换为IAB-donor-CU或者IAB-donor-CU-CP。其它情况可以依此类推。
结合前面的描述，如图4所示，为本申请实施例提供的第一种通信方法流程示意图。参见图4，该方法包括如下步骤。
步骤401，IAB宿主基站确定第一指示信息。
其中，在一种可能的情况下，第一指示信息可以直接指示第一无线承载的标识，这样，eNB可以直接根据第一无线承载的标识确定出第一无线承载。
在另一种可能的情况下，第一指示信息也可以指示第一控制面消息的第一类型。第一控制面消息可以是F1接口上的控制面消息(例如下行的F1AP消息)。F1AP消息的第一类型可以为non-UE associated(与UE无关)消息类型，或者为UE associated(与UE相关) 消息类型。可选的，F1AP消息的类型还可以表明F1AP消息中携带的IAB节点所服务的子节点或UE的RRC消息，该RRC消息对应的控制面信令无线承载的类型为SRB 0，或SRB 1，或SRB2，因此F1AP消息的第一类型还可以为其中携带的RRC消息对应的信令无线承载类型(SRB 0，或SRB 1，或SRB2)。
在这种情况下，该方法还包括步骤400，IAB宿主基站需要向eNB发送配置消息，其中，配置消息中包括控制面消息的类型和无线承载之间的映射关系(其中包含第一类型和第一无线承载之间的映射关系)。这样，eNB就可以利用该映射关系，根据第一控制面消息的第一类型确定出对应的第一无线承载。
步骤402，IAB宿主基站向eNB发送第一消息，第一消息包括第一控制面消息和第一指示消息。
具体来说，第一控制面消息可以是上文示例的下行F1AP消息，第一无线承载可以是IAB节点在LTE空口的SRB(例如SRB 1或SRB 0或SRB2)。IAB宿主基站可以将第一指示信息和下行F1AP消息封装在X2AP消息中，然后IAB宿主基站通过X2接口发送至eNB。例如，在一种可能的实施例中，IAB宿主基站可以在下行F1AP消息中添加F1-C接口的SCTP协议头信息和IP头信息，然后将上述信息封装在IAB节点的NR制式的RRC消息中，之后再将NR制式的RRC消息携带在X2AP消息中，然后将X2AP消息发送至eNB。或者，在另一种可能的实施例中，IAB宿主基站也可以将下行F1AP消息添加SCTP协议头信息以及IP头信息后，直接将上述信息携带在X2AP消息中，然后将X2AP消息发送至eNB。即该实施例中不再需要进行NR制式的RRC消息封装。其中，所述F1-C接口为IAB宿主基站和IAB节点之间的F1接口的控制面，F1-C接口的协议层包含F1AP层、SCTP层、IP层，F1-C接口的SCTP协议头信息和IP头信息，即分别为该F1-C接口的SCTP协议层头信息和该F1-C接口的IP层头信息。需说明，本申请中，IAB宿主基站向eNB发送X2AP消息时，将通过X2的控制面(X2-C)协议栈的各层处理后再发送，可参考目前X2AP消息的发送，具体细节不再赘述。
步骤403，eNB根据接收的第一消息中的第一指示信息确定第一无线承载。
具体来说，eNB接收到携带下行F1AP消息的X2AP消息后，需要确定对应的无线承载。确定无线承载的方式有多种，在一种可能的实施例中，若第一指示信息是指示第一无线承载的标识，这样，eNB可以直接根据第一无线承载的标识确定出第一无线承载。在另一种可能的实施例中，若第一指示信息是第一控制面消息的第一类型。这样，eNB就可以利用该映射关系，根据第一控制面消息的第一类型确定出对应的第一无线承载。
步骤404，eNB通过第一无线承载向IAB节点发送第二消息，第二消息包括第一控制面消息。
具体来说，eNB可以将下行F1AP消息封装在LTE制式的RRC消息中，通过LTE链路的第一无线承载将该RRC消息发送至IAB节点(具体可以是该IAB节点的MT)。
其中，eNB向IAB节点发送的LTE制式的RRC消息中可以携带有添加了F1-C接口的SCTP头信息和IP头信息的下行F1AP消息；或者，eNB向IAB节点(具体可以是该IAB节点的MT)发送的LTE制式的RRC消息中可以携带有该IAB节点的NR制式的RRC消息，在NR制式的RRC消息中携带有添加了F1-C接口的SCTP头信息和IP头信息的下行F1AP消息。
步骤405，IAB节点接收第二消息。
具体地，IAB节点可以接收来自eNB发送的RRC消息，然后从RRC消息中获取下行F1AP消息。
本申请实施例中，在IAB非独立组网架构下，若下行F1AP消息通过LTE的空口传输，eNB需要从IAB节点获取下行F1AP消息以及第一指示信息，根据第一指示信息确定第一无线承载，因第一无线承载与下行F1AP消息的类型相对应，使得eNB可以为不同的下行F1AP消息类型选择不同的SRB，从而为终端的业务提供有效的QoS保障。
场景二
本申请实施例中，在NSA组网场景下，即第一无线接入设备和第二无线接入设备均与第一无线回传设备连接。第一无线接入设备或第二无线接入设备可以向第一无线回传设备发送配置消息，该配置消息可以包括无线承载与控制面消息的类型的对应关系(例如包括第一无线承载和控制面消息的第一类型之间的对应关系)。当第一无线回传设备接收到该配置消息后，可以确定用于发送第一类型的第二控制面消息的第一无线承载，然后第一无线回传设备通过第一无线承载向第一无线接入设备发送包括第二控制面消息的第三消息，以便于第一无线接入设备将该第二控制面消息发送至第二无线接入设备。其中，第二控制面消息可以是F1接口上的控制面消息(例如第一无线回传设备和第二无线接入设备之间F1-C接口的上行F1AP消息)。其中第一无线承载为第一无线回传设备和第一无线接入设备之间的链路上的无线承载。
也就是说，第一无线回传设备可以根据配置信息确定待发送的上行F1AP消息对应的第一无线承载，然后在第一无线承载上向第一无线接入设备发送第二控制面消息，再由第一无线接入设备将该第二控制面消息转发至第二无线接入设备。以便第一无线回传设备在通过与第一无线接入设备之间的空口传输不同类型的F1AP消息时选择不同的无线承载，为第一无线回传设备所连接的终端的业务提供有效的QoS保障。
本申请实施例中，第一无线接入设备和第二无线接入设备的通信制式可以不同，例如，第一无线接入设备可以为图2A中的主基站(eNB)，第二无线接入设备可以为图2B中的辅基站(IAB宿主基站)，第一无线回传设备可以为图2A中的IAB节点。在一种可能的情况下，若IAB宿主基站为CU-DU分离的形态，第二无线接入设备可以是IAB宿主基站中的CU功能实体。在另一种可能的情况下，若IAB宿主基站中的CU包括控制面(CP)功能实体和用户名(UP)功能实体，则第二无线接入设备可以为IAB宿主基站中的CU-CP功能实体。若第二无线接入设备可以为图2B中的辅基站(IAB宿主基站)，那么第二无线接入设备可以直接与第一无线回传设备连接，第二无线接入设备也可以先连接至其它无线回传设备，其它无线回传设备再连接至第一无线回传设备，也就是说，第二无线接入设备支持单跳或多跳连接至第一无线回传设备。若第二无线接入设备为IAB-donor-CU或者IAB-donor-CU-CP，那么第二无线接入设备可以通过IAB-donor-DU与第一无线回传设备连接，或者可以通过IAB-donor-DU以及一个或者多个其他无线回传设备与第一无线回传设备连接。
下面以第一无线回传设备为图2A中的IAB节点，第一无线接入设备为图2A中的LTE系统的eNB，第二无线接入设备为图2A中的IAB宿主基站为例进行描述，其它情况可以依此类推。
结合前面的描述，如图5所示，为本申请实施例提供的第二种通信方法流程示意图。参见图5，该方法包括如下步骤。
步骤501，IAB节点接收配置消息。
其中，该配置消息包括无线承载和控制面消息的类型之间的对应关系，例如包括第一无线承载和控制面消息的第一类型之间的对应关系。其中，配置关系中的无线承载可以为LTE的空口的SRB(例如SRB1或SRB0或SRB2)。第二控制面消息可以是IAB节点和IAB宿主基站之间F1接口上的控制面消息(例如上行F1AP消息)。该配置消息可以是从IAB宿主基站或eNB接收的。
其中，F1AP消息的类型可以为non-UE associated(与UE无关)消息类型，或者为UE associated(与UE相关)消息类型。可选的，还可以包括F1AP消息中携带的IAB node所服务的子节点或终端的RRC消息，该RRC消息对应的控制面信令无线承载类型为SRB 0，或SRB 1，或SRB2，因此F1AP消息的第一类型还可以为其中携带的RRC消息对应的信令无线承载类型(SRB 0，或SRB 1，或SRB2)。
在一种可能的实施例中，IAB节点可以从IAB宿主基站接收配置消息。在这种情况下，该方法还包括步骤500a，IAB宿主基站向IAB节点发送配置信息。该配置信息可以携带在IAB宿主基站发送给IAB节点(具体可以是IAB节点的MT功能实体)的RRC消息(该RRC消息为NR制式的RRC消息)中，或者该配置信息可以携带在IAB宿主基站发送给IAB节点(具体可以是IAB节点的DU功能实体)的F1AP消息中。
在另一种可能的实施例中，IAB节点可以从eNB接收该配置消息。在这种情况下，该方法还包括步骤500b，eNB向IAB节点发送配置信息。该配置消息可以携带在eNB发送给IAB节点(具体可以是IAB节点的MT功能实体)的RRC消息(该RRC消息为LTE制式的RRC消息)中。可选的，eNB在向IAB节点发送该配置消息之前，可以从IAB宿主基站获取该配置消息。
步骤502，IAB节点获取第二控制面消息，其中，第二控制面消息的类型为第一类型。
其中，第二控制面消息可以为上行F1AP消息。在一种可能的实施例中，IAB节点可以生成该上行F1AP消息。IAB节点可以确定该F1AP消息的类型为第一类型。
步骤503，IAB节点根据该配置消息，确定与第二控制面消息的第一类型对应的第一无线承载。
也就是说，IAB节点可以在发送该上行F1AP消息时，利用配置消息中的映射关系确定用于传输该F1AP消息的LTE空口的SRB。
步骤504，IAB节点通过第一无线承载向eNB发送第三消息，第三消息包括第二控制面消息。
本申请实施例中，IAB节点将F1AP消息执行F1-C接口的SCTP协议层和IP层处理后，封装在RRC消息中经由LTE空口发送至eNB，以便由eNB转发。
步骤505，eNB接收该第三消息，并向IAB宿主基站发送该第二控制面消息。
因第三消息中携带目的IP地址(例如第一目的IP地址)，因此eNB可以根据该目的IP地址，确定出IAB宿主基站，继而通过X2接口将该第二控制面消息(即IAB节点的上行F1AP消息)发送至IAB宿主基站。
在一种可能的实施例中，由于IAB节点发送上行F1AP消息时，可以通过LTE空口传输(即，将F1AP消息封装在LTE制式的RRC消息中经由LTE空口向eNB发送后再由eNB向IAB宿主转发)，也可能通过NR空口传输(即，将F1AP消息通过NR回传链路向IAB宿主发送)，故IAB节点还需要确定该通过哪个空口传输下行F1AP消息。为此，IAB宿 主基站会为IAB节点配置至少两个不同的IP地址，该IP地址可以是IAB节点发送上行F1AP消息时所使用的源IP地址，或者是IAB节点发送上行F1AP消息时所使用的目的IP地址(即IAB宿主基站的IP地址)。IAB宿主基站将不同IP地址(可以为IAB节点发送F1AP消息的源IP地址和/或目的IP地址)与不同空口(LTE空口或NR空口)的对应关系配置给IAB节点。这样，IAB节点在发送上行F1AP消息时，可以选择不同的IP地址(包括源IP地址和/或目的IP地址)，然后根据不同的IP地址，确定是将F1AP消息封装在RRC消息中经由LTE空口发送，还是将F1AP消息通过NR回传链路发送。可选的，IAB节点可以在将封装有上行F1AP消息的IP数据包交给下层之前，根据数据包中携带的源IP地址和或目标IP地址，确定下层协议层为LTE空口的RRC层，还是NR回传链路的BAP层。
IAB宿主基站可以向IAB节点(具体可以是IAB节点的MT)发送RRC消息，或者向IAB节点(具体可以是IAB节点的DU)发送F1AP消息，在该RRC消息或F1AP消息中携带不同IP地址与不同空口的对应关系：例如IP地址1对应于LTE空口，IP地址2对应于NR空口，其中IP地址1和IP地址2为IAB节点发送上行F1AP消息的源IP地址或者目的IP地址；或者，IP地址1和IP地址2对应于LTE空口，IP地址3和IP地址4对应于NR空口，其中IP地址1和IP地址3为IAB节点发送上行F1AP消息的源IP地址(即IAB节点自己的IP地址)，IP地址2和IP地址4为IAB节点发送上行F1AP消息的目的IP地址(即IAB宿主基站的IP地址)。
例如，IAB宿主基站为IAB节点配置IP地址：IP address 1，该IP address 1对应于LTE空口(或者指明F1AP消息对应的下层协议层为LTE RRC)；以及IAB宿主基站为IAB节点配置IP地址：IP address 2，该IP address 2对应于NR空口(或者指明F1AP消息对应的下层协议层为回传适配协议(backhaul adaptation protocol，BAP)层)。IP address 1和IP address 2可以为IAB节点的IP地址或IAB宿主基站的IP地址。当IAB节点和IAB宿主基站之间的NR回传链路正常时，IAB节点在发送上行F1AP消息时使用IP address 2，并选择对应的NR回传链路传输；当IAB节点和IAB宿主基站之间的NR回传链路不可用(例如至少一段无线回传链路发生无线链路失败或者阻塞blockage)时，IAB节点在发送上行F1AP消息时使用IP address 1，并选择对应的LTE链路传输。为此，IAB节点可以为不同路径传输的上行F1AP消息配置不同的IP地址，便于执行路由选择。
再比如，IAB宿主基站可以为IAB节点配置第一对地址(目的地址IP address 2和源地址IP address 1)和第二对地址(目的地址IP address 4和源地址IP address 3)，基于上述对应关系，可以该IP address 2对应于LTE空口(或者指明F1AP消息对应的下层协议层为LTE RRC)，该IP地址4对应于NR空口。若IAB节点和IAB宿主基站之间的NR回传链路正常时，IAB节点在发送上行F1AP消息时使用第二对地址，并选择对应的NR回传链路传输；当IAB节点和IAB宿主基站之间的NR回传链路不可用(例如至少一段无线回传链路发生无线链路失败或者阻塞blockage)时，IAB节点在发送上行F1AP消息时使用第一对地址，并选择对应的LTE链路传输。为此，IAB节点可以为不同路径传输的上行F1AP消息配置不同的IP地址，便于执行路由选择。
本申请实施例中，对于上行F1AP消息，即针对IAB节点发送给IAB宿主基站的F1AP消息，当IAB节点需要经由LTE空口传输该F1AP消息时，IAB节点需要根据配置信息确定LTE空口的SRB。IAB节点将不同的F1AP消息封装在不同的LTE SRB上，使得IAB 节点的F1AP消息在LTE空口传输时，F1AP消息的类型不同，eNB确定IAB节点和eNB之间的LTE空口上的SRB也不同，因此可以提供不同的QoS保障。
对于IAB网络，本申请还提供一种通信方法，该方法用以实现IAB节点的主基站(或者称为主节点)为IAB节点选择合适的辅基站(或者称为辅节点)，如图6所示，该方法包含以下步骤。
步骤601，第一节点发送广播消息，其中该广播消息中包括指示信息，该指示信息用于指示第一节点能够支持IAB节点的接入。
具体的，第一节点可以是IAB宿主基站(具体可以是IAB宿主DU)，或者第一IAB节点。第一节点可以在其服务的小区的系统信息(system information，SI)中携带该指示信息，例如第一节点在其发送的系统信息块(System Information Block，SIB)1中携带该指示信息。
步骤602，第二节点接收该广播消息，并从该广播消息中获取指示信息。
也就是说，第二节点读取第一节点发送的指示信息，确定第一节点支持IAB节点的接入。
其中，第二节点为第二IAB节点，第二节点接入第三节点服务的小区(即为第二节点提供接入服务的主小区)，第三节点为第二节点的主基站，例如第三节点可以是LTE制式的eNB。
步骤603，第二节点向第三节点发送通知消息，其中该通知消息包括第一节点或者第一节点服务的小区支持IAB节点接入的指示信息。可选的，该通知消息中还可以包括第二节点对第一节点服务小区的测量结果。
步骤604，第三节点确定第一节点为第二节点的辅基站，或者选择第一节点服务的小区为第二节点的辅小区。
具体的，第三节点根据步骤603中接收到的通知消息，选择第一节点作为第二节点的辅基站。其中，若第一节点为第一IAB节点，则第三节点选择第一IAB节点所连接到的IAB宿主基站作为第二节点的辅基站，选择第一IAB节点作为第二节点在IAB宿主基站下的父节点；若第一节点为IAB宿主基站，则第三节点选择该IAB宿主基站作为第二节点的辅基站。
后续步骤中，第三节点将执行为第二节点添加辅基站的步骤，具体步骤可参考现有技术，本申请实施例中不再赘述。
基于本申请提供的实施例，IAB节点的主服务基站，可以为IAB节点选择支持IAB接入的辅基站，避免选择的辅基站无法支持IAB节点的接入，导致IAB节点无法利用辅小区为UE提供回传服务。
上述本申请提供的实施例中，分别从各个设备之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，第一无线回传设备、第一无线接入设备与第二无线接入设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
与上述构思相同，如图7所示，本申请实施例还提供一种装置700用于实现上述方法 中第一无线接入设备(例如eNB)或第二无线接入设备(例如IAB宿主基站)的功能。例如，该装置可以为软件模块或者芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。该装置700可以包括：处理单元701和通信单元702。
本申请实施例中对模块的划分是示意性的，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。另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
示例性地，当该装置700实现图4所示的流程中第一无线接入设备的功能时：
通信单元702，用于接收来自第二无线接入设备的第一消息，第一消息包括第一控制面消息和第一指示信息。
处理单元701，用于根据第一指示信息确定第一无线承载。
通信单元702，还用于通过第一无线承载向第一无线回传设备发送第二消息，第二消息包括第一控制面消息。
在一个可能的设计中，第一指示信息可以直接指示第一无线承载的标识，这样，处理单元701可以直接根据第一无线承载的标识确定出第一无线承载。
在一个可能的设计中，第一指示信息也可以指示第一控制面消息的第一类型。通信单元702，还用于向第一无线回传设备发送配置消息，其中，配置消息中包括控制面消息的类型和无线承载之间的映射关系。这样，处理单元701可以利用该映射关系，根据第一控制面消息的第一类型确定出对应的第一无线承载。
示例性地，当该装置700实现图4所示的流程中第二无线接入设备的功能时：
处理单元701，用于确定第一指示信息。
通信单元702，用于向第一无线接入设备发送包括第一指示信息的第一消息，其中，第一指示信息用于确定第一无线接入设备与第一无线回传设备之间传输的第一控制面消息对应的第一无线承载。
在一个可能的设计中，第一指示信息用于指示第一无线承载的标识。
在一个可能的设计中，第一指示信息也可以指示第一控制面消息的第一类型。
在一个可能的设计中，当第一指示信息指示第一控制面消息的第一类型时，通信单元702，还用于向第一无线接入设备发送配置消息，该配置消息中包括第一控制面消息的第一类型和所述第一无线承载之间的映射关系；配置消息用于确定与第一控制面消息的第一类型对应的第一无线承载。
其中，所述第一控制面消息为F1接口上的F1AP消息。
示例性地，当该装置700实现图5所示的流程中第一无线回传设备的功能时：
通信单元702，用于接收配置消息，该配置消息包括第一无线承载和控制面消息的第一类型之间的对应关系。
处理单元701，用于获取第二控制面消息，以及根据配置消息，确定与第二控制面消息的第一类型对应的第一无线承载。
通信单元702，还用于通过第一无线承载向第一无线接入设备发送第三消息，第三消息包括第二控制面消息。
在一个可能的设计中，通信单元702可以从第一无线接入设备或第二无线接入设备接收该配置消息。
在一个可能的设计中，通信单元702可以从第一无线接入设备接收第五消息，第五消息包括第一IP地址与第一空口的映射关系，通信单元702确定与第二控制面消息中的第一IP地址对应的第一空口，继而根据配置消息，确定与第二控制面消息的第一类型对应的第一空口上的第一无线承载。
其中，所述第二控制面消息为F1接口上的F1AP消息，为第一无线回传设备向第二无线接入设备发送的F1AP消息。
示例性地，当该装置700实现图5所示的流程中第一无线接入设备的功能时：
通信单元702，用于通过第一无线承载从第一无线回传设备接收第三消息，所述第三消息包括第二控制面消息。
处理单元701，用于确定第三消息中第二控制面消息的目的IP地址对应的第二无线接入设备。
通信单元702，用于向第二无线接入设备发送第四消息，第四消息包括第二控制面消息。
在一个可能的设计中，所述通信单元702还用于在接收第三消息之前，向第一无线回传设备发送配置消息，所述配置消息包括所述第一无线承载和控制面消息的第一类型之间的对应关系。以便于第一无线回传设备确定与第二控制面消息的第一类型对应的第一无线承载。
在一个可能的设计中，所述通信单元702还用于从第二无线接入设备接收配置消息。
示例性地，当该装置700实现图5所示的流程中第二无线接入设备的功能时：
处理单元701，用于生成配置消息，该配置消息包括第一无线承载和控制面消息的第一类型之间的映射关系。
通信单元702，用于向第一无线回传设备发送配置消息；该配置消息用于第一无线回传设备确定与第二控制面消息的第一类型对应的第一无线承载。
或者，通信单元702，用于向第一无线接入设备发送所述配置消息；所述配置消息用于确定所述第一无线接入设备与第一无线回传设备之间传输的第二控制面消息对应的第一无线承载。
示例性地，当该装置700实现图6所示的流程中第三节点的功能时：
通信单元702，用于接收通知消息，该通知消息包括第一节点或者第一节点服务的小区支持IAB节点接入的指示信息。可选的，该通知消息中还可以包括第二节点对第一节点服务小区的测量结果。
处理单元701，用于确定第一节点为第二节点的辅基站，或者选择第一节点服务的小区为第二节点的辅小区。
示例性地，当该装置700实现图6所示的流程中第一节点的功能时：
通信单元702，用于发送广播消息，其中该广播消息中包括指示信息，该指示信息用于指示第一节点能够支持IAB节点的接入。
示例性地，当该装置700实现图6所示的流程中第二节点的功能时：
通信单元702，用于接收该广播消息，并从该广播消息中获取指示信息。
通信单元702，还用于向第三节点发送通知消息，其中该通知消息包括第一节点或者第一节点服务的小区支持IAB节点接入的指示信息。可选的，该通知消息中还可以包括第二节点对第一节点服务小区的测量结果。
如图8所示为本申请实施例提供的装置800，图8所示的装置可以为图7所示的装置的一种硬件电路的实现方式。该通信装置可适用于图4～图5所示出的流程图中，执行上述方法实施例中第一无线接入设备或者第二无线接入设备或者第一无线回传设备的功能。为了便于说明，图8仅示出了该通信装置的主要部件。
图8所示的装置800包括至少一个处理器820，用于实现本申请实施例提供的图4～图6中任一方法。
装置800还可以包括至少一个存储器830，用于存储程序指令和/或数据。存储器830和处理器820耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器820可能和存储器830协同操作。处理器820可能执行存储器830中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
装置800还可以包括通信接口810，用于通过传输介质和其它设备进行通信，从而用于装置800中的装置可以和其它设备进行通信。在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口。在本申请实施例中，收发器可以为独立的接收器、独立的发射器、集成收发功能的收发器、或者是接口电路。处理器820利用通信接口810收发数据，并用于实现图4～图6对应的实施例中第一无线接入设备或者第二无线接入设备或者第一无线回传设备所执行的方法，具体可以参考前面的描述，在此不再赘述。
基于与上述方法实施例相同构思，本申请实施例还提供了一种计算机可读存储介质，其上存储有一些指令，这些指令被计算机调用执行时，可以使得计算机完成上述方法实施例、方法实施例的任意一种可能的设计中所涉及的方法。本申请实施例中，对计算机可读存储介质不做限定，例如，可以是RAM(random-access memory，随机存取存储器)、ROM(read-only memory，只读存储器)等。
基于与上述方法实施例相同构思，本申请还提供一种计算机程序产品，该计算机程序产品在被计算机调用执行时可以完成方法实施例以及上述方法实施例任意可能的设计中所涉及的方法。
基于与上述方法实施例相同构思，本申请还提供一种芯片，该芯片可以包括处理器以及接口电路，用于完成上述方法实施例、方法实施例的任意一种可能的实现方式中所涉及的方法，其中，“耦合”是指两个部件彼此直接或间接地结合，这种结合可以是固定的或可移动性的，这种结合可以允许流动液、电、电信号或其它类型信号在两个部件之间进行通信。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现 在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (32)

  1. 一种通信方法，其特征在于，所述方法包括：
    第一无线接入设备从第二无线接入设备接收第一消息，所述第一消息包括第一控制面消息以及第一指示信息；
    所述第一无线接入设备根据所述第一指示信息确定第一无线承载；
    所述第一无线接入设备通过所述第一无线承载向第一无线回传设备发送第二消息，所述第二消息包括所述第一控制面消息；
    其中，所述第一无线接入设备和所述第二无线接入设备均与所述第一无线回传设备连接。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第一指示信息用于指示所述第一无线承载的标识。
  3. 根据权利要求1或者2所述的方法，其特征在于，所述第一无线承载为所述第一无线回传设备与所述第一无线接入设备之间的信令无线承载SRB。
  4. 根据权利要求1所述的方法，其特征在于，
    所述第一指示信息用于指示所述第一控制面消息的第一类型。
  5. 根据权利要求4所述的方法，其特征在于，还包括：
    所述第一无线接入设备从所述第二无线接入设备接收配置消息，所述配置消息中包括所述第一控制面消息的第一类型和所述第一无线承载之间的映射关系；
    第一无线接入设备根据所述第一指示信息确定第一无线承载，包括：
    所述第一无线接入设备根据所述配置消息和所述第一指示信息，确定与所述第一控制面消息的第一类型对应的第一无线承载。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，所述第一控制面消息为F1接口上的F1应用层协议AP消息，所述F1接口为所述第一无线回传设备与所述第二无线接入设备之间的接口。
  7. 根据权利要求1至6任一项所述的方法，其特征在于，所述第一无线接入设备和所述第二无线接入设备的通信制式不同。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述第一无线接入设备为长期演进LTE系统的基站，所述第二无线接入设备为接入回传一体化IAB宿主基站。
  9. 一种通信方法，其特征在于，所述方法包括：
    第二无线接入设备确定第一指示信息；
    所述第二无线接入设备向第一无线接入设备发送包括所述第一指示信息的第一消息，所述第一指示信息用于所述第一无线接入设备确定所述第一无线接入设备与第一无线回传设备之间传输的所述第一控制面消息对应的第一无线承载；
    其中，所述第一无线接入设备和所述第二无线接入设备均与所述第一无线回传设备连接。
  10. 根据权利要求9所述的方法，其特征在于，所述第一指示信息用于指示所述第一无线承载的标识。
  11. 根据权利要求9或者10所述的方法，其特征在于，所述第一无线承载为所述第一无线回传设备与所述第一无线接入设备之间的信令无线承载SRB。
  12. 根据权利要求9所述的方法，其特征在于，
    所述第一指示信息用于指示所述第一控制面消息为第一类型。
  13. 根据权利要求12所述的方法，其特征在于，还包括：
    所述第二无线接入设备向所述第一无线接入设备发送配置消息，所述配置消息中包括所述第一控制面消息的所述第一类型和所述第一无线承载之间的映射关系；所述配置消息用于所述第一无线接入设备确定与所述第一控制面消息的第一类型对应的第一无线承载。
  14. 根据权利要求9至13任一项所述的方法，其特征在于，所述第一控制面消息为F1接口上的F1应用层协议AP消息，所述F1接口为所述第一无线回传设备与所述第二无线接入设备之间的接口。
  15. 根据权利要求9至14任一项所述的方法，其特征在于，所述第一无线接入设备和所述第二无线接入设备的通信制式不同。
  16. 根据权利要求9至15任一项所述的方法，其特征在于，所述第一无线接入设备为长期演进系统的基站，所述第二无线接入设备为接入回传一体化IAB宿主基站。
  17. 一种通信方法，其特征在于，所述方法包括：
    第一无线回传设备接收配置消息，所述配置消息包括第一无线承载和第一类型之间的对应关系；
    所述第一无线回传设备获取控制面消息，其中，所述控制面消息的类型为所述第一类型；
    所述第一无线回传设备根据所述配置消息，确定与所述第二控制面消息的第一类型对应的所述第一无线承载；
    所述第一无线回传设备通过所述第一无线承载向所述第一无线接入设备发送第三消息，所述第三消息包括所述控制面消息；
    其中，所述第一无线接入设备和所述第二无线接入设备均与所述第一无线回传设备连接，所述第二控制面消息的目的地址为所述第二无线接入设备。
  18. 根据权利要求17所述的方法，其特征在于，所述配置消息是从所述第一无线接入设备或所述第二无线接入设备接收的。
  19. 根据权利要求17所述的方法，其特征在于，还包括：
    所述第一无线回传设备从所述第一无线接入网设备接收第五消息，所述第五消息包括第一IP地址与第一空口的映射关系；
    所述第一无线回传设备获取控制面消息，并确定与所述控制面消息中的第一IP地址对应的第一空口，所述第一空口为所述第一无线回传设备和第一无线接入网设备之间的空口；
    所述第一无线回传设备根据所述配置消息，确定与所述第一类型对应的所述第一无线承载，包括：
    所述第一无线回传设备根据所述配置消息，确定与所述控制面消息的第一类型对应的第一无线承载，所述第一无线承载为所述第一空口上的无线承载。
  20. 根据权利要求17至19任一项所述的方法，其特征在于，所述第一无线承载为所述第一空口上的信令无线承载SRB。
  21. 根据权利要求17至19任一项所述的方法，其特征在于，所述控制面消息为F1接口上的F1应用层协议AP消息，所述F1接口为所述第一无线回传设备与所述第二无线接入设备之间的接口。
  22. 根据权利要求17至21任一项所述的方法，其特征在于，所述第一无线接入设备为长期演进系统的基站，所述第二无线接入设备为接入回传一体化IAB宿主基站。
  23. 一种通信方法，其特征在于，所述方法包括：
    第一无线接入网设备通过第一无线承载从第一无线回传设备接收第三消息，所述第三消息包括控制面消息；
    所述第一无线接入网设备向第二无线接入网设备发送第四消息，所述第四消息包括所述控制面消息；
    其中，所述第一无线承载与所述控制面消息的第一类型相对应。
  24. 根据权利要求23所述的方法，其特征在于，还包括：
    所述第一无线接入网设备向所述第一无线回传设备发送配置消息，所述配置消息包括所述第一无线承载和所述控制面消息的第一类型之间的对应关系。
  25. 根据权利要求24所述的方法，其特征在于，还包括：
    所述第一无线接入网设备从所述第二无线接入网设备接收所述配置消息。
  26. 根据权利要求23至25任一项所述的方法，其特征在于，所述控制面消息为所述第一无线回传设备向所述第二无线接入设备发送的F1AP消息。
  27. 一种通信方法，其特征在于，所述方法包括：
    第二无线接入网设备生成配置消息，所述配置消息包括第一无线承载和控制面消息的第一类型之间的对应关系；
    所述第二无线接入网设备向第一无线回传设备发送所述配置消息；所述配置消息用于所述第一无线回传设备确定与控制面消息的第一类型对应的第一无线承载。
  28. 一种通信方法，其特征在于，所述方法包括：
    第二无线接入网设备生成配置消息，所述配置消息包括第一无线承载和第一类型之间的对应关系；
    所述第二无线接入网设备向第一无线接入网设备发送所述配置消息；所述配置消息用于第一无线回传设备确定所述第一无线接入设备与第一无线回传设备之间传输的控制面消息对应的第一无线承载。
  29. 一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器与存储器相连，所述至少一个处理器用于读取并执行所述存储器中存储的程序，以使得所述装置执行如权利要求1-8，或9-16，或17-22，或23-26，或27或28任一项所述的方法。
  30. 一种芯片，其特征在于，所述芯片与存储器耦合，用于读取并执行所述存储器中存储的程序指令，以实现如权利要求1-28任一项所述的方法。
  31. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机指令，当所述指令在计算机上运行时，使得计算机执行如权利要求1-28任一所述的方法。
  32. 一种计算机程序产品，其特征在于，所述计算机程序产品在被计算机调用时，使得计算机执行如权利要求1-28任一所述的方法。
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