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WO2025044334A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2025044334A1
WO2025044334A1 PCT/CN2024/095564 CN2024095564W WO2025044334A1 WO 2025044334 A1 WO2025044334 A1 WO 2025044334A1 CN 2024095564 W CN2024095564 W CN 2024095564W WO 2025044334 A1 WO2025044334 A1 WO 2025044334A1
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WO
WIPO (PCT)
Prior art keywords
donor
address
iab node
bap
node
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2024/095564
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English (en)
Chinese (zh)
Inventor
朱世超
朱元萍
孙飞
史玉龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2025044334A1 publication Critical patent/WO2025044334A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the embodiments of the present application relate to the field of communication technology, and in particular, to a communication method and device.
  • the fifth generation (5G) mobile communication system has put forward more stringent requirements for various network performance indicators. For example, the capacity is increased by 1000 times, the coverage requirements are wider, and the ultra-high reliability and low latency are required.
  • the capacity is increased by 1000 times, the coverage requirements are wider, and the ultra-high reliability and low latency are required.
  • the use of high-frequency small base stations to form a network is becoming more and more popular.
  • the propagation characteristics of high-frequency carriers are poor, the attenuation is serious due to obstruction, and the coverage range is not wide, so a large number of small base stations need to be deployed densely.
  • IAB Integrated access and backhaul
  • A access link
  • BL backhaul link
  • the embodiments of the present application provide a communication method and apparatus, so that an IAB node can obtain a BAP address of a donor-DU associated with an IP address.
  • a communication method wherein the execution subject of the method is an IAB node, or a module (e.g., a chip or circuit, etc.) in the IAB node, and taking the IAB node as the execution subject as an example, the method comprises: the IAB node receives first information from a network manager, the first information comprises an Internet Protocol IP address assigned by the network manager to the IAB node; the IAB node sends second information to a donor-CU, a centralized unit of a host node, and the second information comprises an IP address; the IAB node receives third information from the donor-CU, the third information comprises a backhaul link adaptation layer protocol BAP address, and the BAP address is a BAP address of a distributed unit of a host node, donor-DU, associated with the IP address.
  • the network manager may perform OAM for the operation management and maintenance of the IAB node.
  • the IAB node when the network manager assigns an IP address to the IAB node, the IAB node can report the IP address assigned by the network manager to the donor-CU, and the donor-CU obtains the BAP address of the donor-DU associated with the IP address, and sends the corresponding BAP address to the IAB node, so that the IAB node can obtain the BAP address of the donor-CU associated with the IP address.
  • the IAB node determines a BAP routing identifier corresponding to the uplink data, the BAP routing identifier includes a BAP address; the IAB node determines an IP address associated with the BAP address based on third information; the IAB node uses the IP address as a source IP address of the uplink data; and the IAB node sends the uplink data to the donor-CU.
  • the IAB node can select an IP address from at least one configured IP address as the source IP address of the uplink data based on the BAP address of the target node included in the BAP routing identifier, where the BAP address of the target node may be the BAP address of the donor-DU, thereby ensuring the correct transmission of the uplink data.
  • the second aspect is the donor-CU side corresponding to the first aspect.
  • the beneficial effects can be found in the description of the first aspect.
  • a communication method is provided.
  • the execution subject of the method is the donor-CU, or a module in the donor-CU (such as a chip or circuit, etc.).
  • the method includes the donor-CU receiving second information from the IAB node, the second information includes an Internet Protocol IP address, and the IP address is the IP address assigned by the network management to the IAB node; the donor-CU sends third information to the IAB node, the third information includes a backhaul link adaptation layer protocol BAP address, and the BAP address is the BAP address of the host node distributed unit donor-DU associated with the IP address.
  • the donor-CU obtains the association relationship between the donor-DU and the IP address, including: the donor-CU sends fourth information to at least one donor-DU it manages, the fourth information is used to request the donor-DU for the IP address associated with it; the donor-CU receives fifth information from the donor-DU, the fifth information includes the IP address associated with it reported by the donor-DU; the donor-CU determines the association relationship between the donor-DU and the IP address based on the fifth information and the second information.
  • the donor-CU obtains the association relationship between the donor-DU and the IP address, including: the donor-CU receives sixth information from the network management, the sixth information includes an identifier of at least one donor-DU and an IP address of at least one IAB node; the donor-CU determines the association relationship between the donor-DU and the IP address based on the sixth information and the second information.
  • the donor-CU determines the donor-DU associated with the IP address based on the IP address of at least one donor-DU it manages; the donor-CU determines the BAP address of the donor-DU, which is the BAP address.
  • the donor-CU sends seventh information to at least one donor-DU it manages, the seventh information includes an IP address, and the seventh information is used to inquire whether the donor-DU is associated with the IP address; the donor-CU receives eighth information from the donor-DU, and the eighth information is used to indicate that the donor-DU is associated with the IP address; the donor-CU determines the BAP address based on the eighth information.
  • a communication method wherein the execution subject of the method is an IAB node, or a module (chip or circuit, etc.) in the IAB node.
  • the method includes: the IAB node receives a first indication from a host node centralized unit donor-CU, and the first indication is used to indicate the number of host node distributed units donor-DU that can be reached by the IAB node, or to indicate whether the number of donor-DU that can be reached by the IAB node is one.
  • the method further includes: the IAB node sends a first request to the network management or the donor-CU, the first request being used to request the network management or the donor-CU to allocate an IP address to the IAB node.
  • the network management performs OAM for the IAB node.
  • the method further includes: the IAB node sends a second request to the donor-CU, where the second request is used to request the donor-CU to allocate an IP address to the IAB node.
  • the IAB node when the number of donor-DUs reachable by the IAB node is one, the IAB node can request an IP address from the network management or donor-CU; and when the number of donor-DUs reachable by the IAB node is multiple, the IAB node can request an IP address from the donor-CU, thereby ensuring the correct transmission of uplink data.
  • this aspect is the host donor-CU side corresponding to the third aspect.
  • the beneficial effects can be found in the description of the third aspect.
  • a communication method is provided.
  • the execution subject of the method is the donor-CU, or a module in the donor-CU (such as a chip or circuit, etc.).
  • the method includes: the donor-CU determines the number of host node distributed units donor-DU that can be reached by the access backhaul integrated IAB node; the donor-CU sends a first indication to the IAB node, and the first indication is used to indicate the number of donor-DUs that can be reached by the IAB node, or to indicate whether the number of donor-DUs that can be reached by the IAB node is one.
  • a communication method wherein the execution subject of the method is an IAB node, or a module in the IAB node (such as a chip or circuit, etc.), and taking the IAB node as the execution subject as an example, the method includes: the IAB node receives a second indication from a host node centralized unit donor-CU; wherein the second indication is used to indicate a method for the IAB node to obtain an Internet Protocol IP address, and/or to indicate whether the IAB node is allowed to obtain an IP address from a network manager, and the method for the IAB node to obtain an IP address includes obtaining an IP address from a donor-CU or obtaining an IP address from a network manager.
  • the donor-CU determines the way in which the IAB node requests the IP address, or indicates whether the IAB node is allowed to obtain the IP address from the network management, and indicates it to the IAB node, thereby ensuring the correct transmission of uplink data.
  • the number of donor-DUs reachable by the IAB node is one.
  • the second indication when the second indication is used to indicate that the IAB node obtains the IP address from a donor-CU and/or indicates that the IAB node is not allowed to obtain the IP address from a network manager, the number of donor-DUs reachable by the IAB node is multiple.
  • the method when the second indication is used to indicate that the IAB node obtains the IP address from a network manager, the method further includes: the IAB node sends a third request to the network manager, where the third request is used to request the network manager to allocate an IP address to the IAB node.
  • the second indication when used to indicate that the IAB node is allowed to obtain an IP address from the network manager, it also includes: the IAB node sends a fourth request to the network manager, the fourth request is used to request the network manager to allocate an IP address to the IAB node; or, the IAB node sends a fifth request to the donor-CU, the fifth request is used to request the donor-CU to allocate an IP address to the IAB node.
  • the method further includes: the IAB node sends a sixth request to the donor-CU, and the sixth request The request is used to request the donor-CU to allocate an IP address to the IAB node.
  • the second indication when the second indication is used to indicate that the IAB node obtains the IP address from a donor-CU and/or indicates that the IAB node is not allowed to obtain the IP address from a network manager, the second indication includes the IP address of the IAB node.
  • a communication method is provided, and the executor of the method is the donor-CU, or a module in the donor-CU (for example, a chip or circuit, etc.).
  • the method includes: the donor-CU sends a second indication to the access backhaul integrated IAB node; wherein the second indication is used to indicate a method for the IAB node to obtain an Internet Protocol IP address, and/or to indicate whether the IAB node is allowed to obtain an IP address from a network manager, and the method for the IAB node to obtain an IP address includes obtaining an IP address from the donor-CU or obtaining an IP address from a network manager.
  • the further step includes: the donor-CU determining the number of donor-DU distributed units of the host node reachable from the IAB node; and the donor-CU determining a second indication based on the number of donor-DUs reachable from the IAB node.
  • the donor-CU determines a second indication based on the number of donor-DUs reachable by the IAB node, including: when the number of donor-DUs reachable by the IAB node is one, the second indication is used to indicate that the IAB node obtains an IP address from a network manager, or to indicate that the IAB node is allowed to obtain an IP address from a network manager.
  • the donor-CU determines a second indication based on the number of donor-DUs reachable by the IAB node, including: when the number of donor-DUs reachable by the IAB node is multiple, the second indication is used to indicate that the IAB node obtains an IP address from the donor-CU, and/or indicates that the IAB node is not allowed to obtain an IP address from the network manager.
  • the second indication when the second indication is used to indicate that the IAB node obtains the IP address from a donor-CU and/or indicates that the IAB node is not allowed to obtain the IP address from a network manager, the second indication includes the IP address of the IAB node.
  • a communication method wherein the execution subject of the method is an IAB node, or a module (chip or circuit, etc.) in the IAB node, and taking the IAB node as the execution subject as an example, the method comprises: the IAB node receives first configuration information from a network manager, and the first configuration information comprises an Internet Protocol IP address assigned by the network manager to the IAB node and a backhaul link adaptation layer protocol BAP address of a donor node distributed unit donor-DU associated with the IP address.
  • the network manager performs operation management and maintenance (OAM) for the IAB node.
  • OAM operation management and maintenance
  • the network management when the network management configures the IP address for the IAB node, it will also configure the BAP address of the donor-DU associated with the IP address, so that the IAB node can correctly obtain the association relationship between the IP address and the BAP address of the donor-DU.
  • the IAB node can obtain the BAP routing identifier according to the uplink mapping rule, and select the IP address associated with the BAP address of the target donor-DU as the source IP address of the uplink data according to the BAP address of the target donor-DU included in the BAP routing identifier, thereby avoiding or reducing the uplink data from being mistakenly discarded when it reaches the target donor-DU, and ensuring the correct transmission of the uploaded data.
  • the IAB node determines a BAP routing identifier corresponding to the uplink data, the BAP routing identifier includes a BAP address; the IAB node determines an IP address associated with the BAP address based on the first configuration information; the IAB node uses the IP address associated with the BAP address as the source IP address of the uplink data; and the IAB node sends the uplink data to the donor-CU.
  • the eighth aspect is the network management side corresponding to the seventh aspect.
  • the beneficial effects can be found in the description of the seventh aspect.
  • a communication method is provided.
  • the execution subject of the method is the network management, or a module in the network management (such as a chip or circuit, etc.).
  • the method includes: the network management allocates an Internet Protocol IP address to the integrated access backhaul IAB node; the network management determines the backhaul link adaptation layer protocol BAP address of the host node distributed unit donor-DU associated with the IP address; the network management sends the first configuration information to the IAB node, and the first configuration information includes the IP address allocated by the network management to the IAB node and the BAP address of the donor-DU associated with the IP address.
  • the network management is the operation management and maintenance OAM of the IAB node.
  • the network manager determines the BAP address of the donor-DU associated with the IP address, including: the network manager receives ninth information, the ninth information includes the identifier of the donor-DU and the BAP address of the donor-DU; the network manager determines the BAP address of the donor-DU associated with the IP address based on the ninth information.
  • the ninth information comes from a network manager of a donor node centralized unit donor-CU, or a network manager of a donor-DU.
  • the network manager determines a BAP address of a donor-DU associated with an IP address, including: the network manager allocates a BAP address to the donor-DU connected to the IAB node.
  • it also includes: the network manager sends the BAP address of the donor-DU.
  • the network manager sends the BAP address of the donor-DU to the network manager of the donor-CU, or the network manager of the donor-DU, or the donor-DU.
  • a communication method wherein the execution subject of the method is an IAB node, or a module (chip or circuit, etc.) in the IAB node.
  • the method includes: the IAB node cannot determine the Internet Protocol IP address and the host When the node distributed unit donor-DU has a backhaul link adaptation layer protocol BAP address, an IP address is arbitrarily selected from the IP addresses of the IAB nodes as the source IP address of the uplink data; the IAB node sends the uplink data to the donor-DU.
  • the IP address of the IAB node is allocated to the IAB node by the network management.
  • the network manager can allocate IP addresses for the IAB nodes.
  • the IAB nodes can randomly select an IP address from the IP addresses allocated by the network manager and use the IP address as the source IP address of the uplink data.
  • the donor-DU can be configured to exempt the IP address from filtering, thereby ensuring the correct transmission of the uplink data.
  • the tenth aspect is the donor-CU side corresponding to the ninth aspect.
  • the executor of the method is the donor-CU, or a module (chip or circuit, etc.) in the donor-CU.
  • the method includes: the donor-CU receives an Internet Protocol IP address from an access and backhaul integrated IAB node, and the IP address is the IP address assigned by the network management to the IAB; the donor-CU sends second configuration information to the donor-DU, and the second configuration information is used to configure the donor-DU to exempt the IP address from filtering.
  • Exemption from filtering means that when the donor-DU receives uplink data with a source IP address as an IP address or downlink data with a target IP address as an IP address, the uplink data or the downlink data will not be discarded.
  • a device which can implement the method of the first aspect, the third aspect, the fifth aspect, the seventh aspect, or the ninth aspect.
  • the device includes means for executing the corresponding aspects of the first aspect, the third aspect, the fifth aspect, the seventh aspect, or the ninth aspect.
  • the device can be implemented by hardware, software, or by executing the corresponding software implementation by hardware.
  • the apparatus includes a unit that performs the first, third, fifth, seventh, or ninth aspects described above.
  • the apparatus includes a processor configured to execute the method of the first, third, fifth, seventh, or ninth aspect described above.
  • the device includes a processor and an interface circuit
  • the interface circuit is used to receive signals from other devices outside the device and transmit them to the processor or send signals from the processor to other devices outside the device
  • the processor is used to implement the methods of the above-mentioned first aspect, third aspect, fifth aspect, seventh aspect or ninth aspect through logic circuits or execution code instructions.
  • the device includes a processor and a memory, and the processor is used to execute a computer program or instructions stored in the memory, so that the device implements the method of the first aspect, the third aspect, the fifth aspect, the seventh aspect or the ninth aspect mentioned above.
  • a device which can implement the method of the second aspect, the fourth aspect, the sixth aspect, the eighth aspect or the tenth aspect.
  • the device includes means corresponding to the second aspect, the fourth aspect, the sixth aspect, the eighth aspect or the tenth aspect.
  • the device can be implemented by hardware, software or by executing the corresponding software implementation by hardware.
  • the apparatus includes a unit that performs the second, fourth, sixth, eighth, or tenth aspects described above.
  • the apparatus includes a processor configured to execute the method of the second, fourth, sixth, eighth or tenth aspect described above.
  • the device includes a processor and an interface circuit
  • the interface circuit is used to receive signals from other devices outside the device and transmit them to the processor or send signals from the processor to other devices outside the device
  • the processor is used to implement the methods of the second, fourth, sixth, eighth or tenth aspect above through logic circuits or execution code instructions.
  • the device includes a processor and a memory, and the processor is used to execute a computer program or instructions stored in the memory, so that the device implements the method of the second aspect, fourth aspect, sixth aspect, eighth aspect or tenth aspect above.
  • a computer-readable storage medium storing a computer program or instruction.
  • the computer program or instruction When executed on a computer, the computer implements the method of any one of the first to tenth aspects.
  • a computer program product comprising a computer program or instructions, which, when executed by a computer, enables the method of any one of the first to tenth aspects to be executed.
  • a chip comprising a processor, wherein the processor is coupled to a memory and is used to execute a computer program or instruction stored in the memory, so that the chip implements the method of any one of the first to tenth aspects above.
  • a communication system comprising: a first communication device and a second communication device; wherein the first communication device is used to implement the method of the first aspect above, and the second communication device is used to implement the method of the second aspect above; or, the first communication device is used to implement the method of the third aspect above, and the second communication device is used to implement the method of the fourth aspect above; or, the first communication device is used to implement the method of the fifth aspect above, and the second communication device is used to implement the method of the sixth aspect above; or, the first communication device is used to implement the method of the seventh aspect above, and the second communication device is used to implement the method of the eighth aspect above; or, the first communication device is used to implement the method of the ninth aspect above, and the second communication device is used to implement the method of the tenth aspect above.
  • FIG1 is a schematic diagram of the architecture of a mobile communication system used in an embodiment of the present application.
  • FIG2 is a schematic diagram of an IAB network provided in an embodiment of the present application.
  • FIG3 is a flow chart provided in an embodiment of the present application.
  • FIG4 is another flow chart provided in an embodiment of the present application.
  • FIG5 is another flow chart provided in an embodiment of the present application.
  • FIG6 is another flow chart provided in an embodiment of the present application.
  • FIG7 is another flow chart provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of a structure of a device provided in an embodiment of the present application.
  • FIG. 9 is another schematic diagram of the structure of the device provided in an embodiment of the present application.
  • FIG1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application.
  • the communication system 1000 includes a radio access network 100 and a core network 200.
  • the communication system 1000 may also include the Internet 300.
  • the radio access network (RAN) 100 may include at least one RAN node (such as 110a and 110b in FIG1 , collectively referred to as 110), and may also include at least one terminal (such as 120a-120j in FIG1 , collectively referred to as 120).
  • the terminal is connected to the radio access network device by wireless means, and the radio access network device is connected to the core network by wireless or wired means.
  • the core network device and the radio access network device may be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device may be integrated on the same physical device, or the functions of part of the core network device and part of the radio access network device may be integrated on one physical device.
  • Terminals and terminals and radio access network devices and radio access network devices may be connected to each other by wire or wireless means.
  • the RAN 100 may be a cellular system related to the 3rd generation partnership project (3GPP), such as a 4th generation (4G) mobile communication system, a 5th generation (5G) mobile communication system, or a future-oriented evolution system, such as a 6th generation (6G) mobile communication system.
  • 3GPP 3rd generation partnership project
  • 4G 4th generation
  • 5G 5th generation
  • 6G 6th generation
  • the RAN 100 may also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (cloud radio access network, CRAN), or a wireless fidelity (wireless fidelity, WiFi) system.
  • the RAN 100 may also be a communication system that integrates two or more of the above systems.
  • the RAN node 110 which may also be sometimes referred to as an access network device, a RAN entity or an access node, etc., constitutes a part of the communication system to help the terminal achieve wireless access.
  • the multiple RAN nodes 110 in the communication system 1000 may be nodes of the same type or nodes of different types. In some scenarios, the roles of the RAN node 110 and the terminal 120 are relative.
  • the network element 120i in FIG. 1 may be a helicopter or a drone, which may be configured as a mobile base station.
  • the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal.
  • the RAN node 110 and the terminal 120 are sometimes referred to as communication devices.
  • the network elements 110a and 110b in FIG. 1 may be understood as communication devices with base station functions
  • the network elements 120a-120j may be understood as communication devices with terminal functions.
  • the RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system.
  • the RAN node may be a macro base station (such as 110a in FIG. 1 ), a micro base station or an indoor station (such as 110b in FIG. 1 ), a relay node or a donor node, or a wireless controller in a CRAN scenario.
  • the RAN node may also be a server, a wearable device, a vehicle or an onboard device.
  • the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU).
  • All or part of the functions of the RAN node in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform).
  • the RAN node in the present application may also be a logical node, a logical module or software that can implement all or part of the RAN node functions.
  • the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU).
  • the CU and DU can be set separately, or can be included in the same network element, such as a baseband unit (BBU).
  • BBU baseband unit
  • the RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), In the active antenna unit (AAU) or remote radio head (RRH).
  • CU or CU-CP and CU-UP
  • DU or RU may also have different names, but those skilled in the art can understand their meanings.
  • CU may also be called O-CU (open CU)
  • DU may also be called O-DU
  • CU-CP may also be called O-CU-CP
  • CU-UP may also be called O-CU-UP
  • RU may also be called O-RU.
  • CU, CU-CP, CU-UP, DU and RU are described as examples in this application.
  • Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.
  • a terminal is a device with wireless transceiver function, which can send signals to a RAN node or receive signals from a RAN node.
  • a terminal can also be called a terminal device, user equipment (UE), mobile station, mobile terminal, etc.
  • the terminal can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • D2D device-to-device
  • V2X vehicle to everything
  • MTC machine-type communication
  • IOT Internet of Things
  • virtual reality augmented reality
  • industrial control automatic driving
  • telemedicine smart grid
  • smart furniture smart office
  • smart wear smart transportation
  • smart city etc.
  • the terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.
  • RAN100 may also include a wireless relay device or a wireless backhaul device.
  • the terminal may access the RAN node through the wireless relay device or the wireless backhaul device.
  • the wireless relay device or the wireless backhaul device is an integrated access and backhaul (IAB) node, and the RAN node is a donor node.
  • IAB integrated access and backhaul
  • the IAB node can provide wireless access services for the terminal, and the service data of the terminal can be transmitted to the host node through the IAB node.
  • the IAB node can directly access the host node or access the host node through other IAB nodes.
  • the IAB node includes a mobile terminal (MT) and a DU.
  • MT mobile terminal
  • DU a DU that provides the terminal role for the IAB node.
  • the IAB node faces its child node, its child node can be other IAB nodes or terminals, and the IAB node plays the role of a network device.
  • the host node may include a CU and a DU, and the host node may be connected to a core network that provides services for the terminal, such as a 5G core network.
  • the CU included in the host node may be called a donor-CU, and the DU included in the host node may be called a donor-DU.
  • one or more IAB nodes may be included on the transmission path between the terminal and the host node.
  • the connection between the IAB node and the terminal is AL; if the child node of the IAB node is another IAB node, the connection between the IAB node and the other IAB nodes is BL, and the connection between the host node and the IAB node is also BL.
  • a transmission path between terminal 1 and the host node is: terminal 1 ⁇ IAB node 4 ⁇ IAB node 3 ⁇ IAB node 1 ⁇ host node.
  • Terminal 1 accesses IAB node 4 via AL
  • IAB node 4 accesses IAB node 3 via BL
  • IAB node 3 accesses IAB node 1 via BL
  • IAB node 1 accesses the host node via BL, and so on.
  • the backhaul adaptation protocol (BAP) layer In the wireless backhaul network, a protocol layer is introduced, called the backhaul adaptation protocol (BAP) layer, which is used to implement functions such as routing and bearer mapping of data packets in the wireless backhaul network.
  • BAP backhaul adaptation protocol
  • the starting point of the BAP layer is located at the IAB node connected to the terminal, and the end point is located at the host node.
  • the BAP layer exists in each IAB node and host node in a transmission path.
  • the donor-CU can assign BAP addresses to the IAB nodes and donor-DUs it manages, so that in the wireless backhaul network, an IAB node and a donor-DU can be identified by the BAP address.
  • the donor-CU can configure mapping rules for the IAB nodes, which can be uplink mapping rules or downlink mapping rules.
  • the mapping rules at least include the mapping relationship between ⁇ donor-CU's IP address and tunnel endpoint ID (TEID) ⁇ and ⁇ BAP routing identifier ⁇ .
  • the BAP routing identifier consists of the BAP address of the target node and the path identifier (path ID, identity, ID).
  • the target node is the host node, and the BAP address of the target node included in the BAP routing identifier can be the BAP address of the donor-DU; for downlink transmission, the target node is the IAB node connected to the terminal, and the BAP address of the target node included in the BAP routing identifier can be the BAP address of the IAB node connected to the terminal.
  • the IAB node uses a data radio bearer (DRB) to receive uplink data sent by the terminal.
  • DRB data radio bearer
  • the IAB node uses the DRB corresponding to the uplink data to determine the donor-CU that has a mapping relationship with the DRB.
  • the IAB node determines the BAP routing identifier corresponding to the donor-CU corresponding to the DRB of the uplink data based on the mapping relationship between ⁇ IP address and TEID of the donor-CU) ⁇ and ⁇ BAP routing identifier ⁇ included in the uplink mapping rule.
  • the IAB node connected to the UE needs to at least encapsulate the uplink data at the IP layer. During the encapsulation process, it needs to obtain the IP address of the IAB node, use the IP address as the source IP address of the uplink data, and carry it in the uplink data. With source IP address.
  • an IAB node may be configured with multiple IP addresses.
  • the donor-CU may configure an IP address for the IAB node.
  • the configuration information also carries the BAP address of the donor-DU associated with the IP address.
  • the IAB node needs to select a source IP address for uplink data from multiple IP addresses, the IP address associated with the BAP address of the donor-DU included in the BAP routing identifier obtained from the uplink mapping rule may be selected as the source IP address of the uplink data.
  • the network manager can also configure an IP address for the IAB node.
  • the network manager configures an IP address for the IAB node, how the IAB node obtains the BAP address of the donor-DU associated with the IP address is a technical problem to be solved by the embodiments of the present application.
  • the network management can configure an IP address for the IAB node.
  • the IAB node receives the IP address configured by the network management, it sends the IP address to the donor-CU.
  • the donor-CU obtains the BAP address of the donor-DU associated with the IP address and sends the BAP address of the donor-DU to the IAB node.
  • a process is provided, which at least includes:
  • Step 310 the network manager sends first information to the IAB node, and the IAB node receives the first information from the network manager, where the first information includes an IP address allocated by the network manager to the IAB node.
  • the network management is operations administration and maintenance (OAM), which can be used for the configuration and management of network devices such as IAB nodes, donor-CUs, and donor-DUs.
  • IAB nodes, donor-CUs, and donor-DUs can be connected to OAM, for example, through core network devices, or through IP networks.
  • the OAMs corresponding to IAB nodes, donor-CUs, and donor-DUs can be the same or different. In the subsequent description of this application, the example that the OAMs corresponding to IAB nodes, donor-CUs, and donor-DUs are different is mainly used for description.
  • the OAM of the IAB node can allocate an IP address to the IAB node, that is, the network management in step 310 can be the OAM of the IAB node.
  • the first information can be an IP address allocation (IP address allocation) message.
  • an IAB node is used to provide wireless access and wireless backhaul services for a child node (the child node may be another IAB node or a terminal).
  • An IAB node may be mobile, and an IAB node may be referred to as a mobile IAB node, or a layer 3 relay node, etc.
  • An IAB node may include two parts: an IAB-MT (may be referred to as MT) and an IAB-DU (may be referred to as DU).
  • an IAB-MT may receive a first message from a network manager and send the first message to an IAB-DU.
  • an IAB-MT may be connected to two different upstream nodes, and the upstream node may be an IAB node, or a host node, etc.
  • the IP address assigned by the network manager to the IAB node is used for the IAB node to communicate with the host node.
  • the relay node may include a mobile terminal function (MT) and a base station function (gNB), and the relevant description of DU in an embodiment of the present application may be replaced with the gNB function part of the relay node.
  • MT mobile terminal function
  • gNB base station function
  • Step 320 the IAB node sends second information to the donor-CU, and the donor-CU receives the second information from the IAB node, where the second information includes the IP address allocated by the network management to the IAB node.
  • Step 330 the donor-CU sends the third information to the IAB node, and the IAB node receives the third information from the donor-CU, where the third information includes a BAP address, and the BAP address is the BAP address of the donor-DU associated with the IP address.
  • the IAB node when the IAB node receives the IP address assigned by the network manager, it can execute step 320 to report the IP address assigned by the network manager to the donor-CU.
  • the donor-CU can determine the BAP address of the donor-DU associated with the IP address, and in step 330, send the BAP address to the IAB node.
  • the second information may be an RRC message, and the name of the RRC message may be IAB other information (IABOtherInformation).
  • the IAB-MT may send the second information to the donor-CU.
  • the third information may be an RRC reconfiguration message.
  • the donor-CU may send the third information to the IAB-DU. Taking into account the situation that the network management can allocate multiple IP addresses to the IAB node, and the IAB node reports multiple IP addresses to the donor-CU at one time, the donor-CU sends the third information to the IAB node, which includes not only the BAP address, but also its corresponding IP address.
  • Step 340 After the donor-CU determines the BAP address of the donor-DU associated with the IP address, the BAP address can also be sent to the donor-DU for configuring the BAP address of the donor-DU. Considering that if the IAB node here is the first IAB node connected to the donor-DU, before this, the donor-DU has not served the IAB node and has not been assigned a BAP address, the donor-CU can trigger the allocation of the BAP address to the donor-DU associated with the IP address after receiving the IP address reported by the IAB node.
  • step 330 may be performed first, and then step 340, or step 340 may be performed first, and then step 330, etc.
  • the donor-CU obtains the BAP address of the donor-DU corresponding to the IP address, and the following three solutions are provided:
  • donor-CU can obtain the association relationship between donor-DU and IP address. Based on the association relationship between donor-DU and IP address, donor-CU determines the donor-DU associated with the IP address. Donor-CU determines the BAP address of the donor-DU associated with the IP address as the BAP address of the donor-DU associated with the IP address.
  • the association relationship between the donor-DU and the IP address obtained by the donor-CU includes: the first donor-DU is associated with IP address 1 to IP address 10, the second donor-DU is associated with IP address 11 to IP address 20, and the third donor-DU is associated with IP address 21 to IP address 30. If the IP address assigned to it by the network management reported by the IAB node is IP address 11, it can be determined that IP address 11 is associated with the second donor-DU.
  • the donor-CU can send the BAP address of the second donor-DU to the IAB node.
  • the donor-CU obtains the association relationship between the donor-DU and the IP address, including: the donor-CU sends fourth information to at least one donor-DU managed by it, and the fourth information is used to request the donor-DU for the IP address associated with it.
  • the donor-CU receives fifth information from the donor-DU, and the fifth information includes the IP address associated with it reported by the donor-DU.
  • the donor-CU determines the association relationship between the donor-DU and the IP address based on the fifth information and the second information.
  • the fourth information and the fifth information can be F1 application protocol (F1AP) messages.
  • F1AP F1 application protocol
  • a donor node may include a donor-CU and at least one donor-DU.
  • the donor-DU is responsible for allocating IP addresses, and the donor-DU stores its allocated IP addresses.
  • the donor-DU may inquire about the IP address it manages from at least one donor-DU it manages.
  • the donor-CU determines the association relationship between the donor-DU and the IP address based on the IP address information fed back by at least one donor-DU.
  • the donor-CU may receive the sixth information from the network management, the sixth information including at least one identifier of the donor-DU and at least one IP address of the IAB node; the donor-CU may determine the association relationship between the IP address reported by the IAB node and the donor-DU based on the sixth information and the second information.
  • the network management may be the OAM of the IAB node, or the OAM of the donor-DU, etc., without limitation.
  • the network management may obtain the association relationship between the donor-DU and the IP address assigned to the donor-DU, and send the association relationship to the donor-CU, etc. through the sixth information, so that the donor-CU may obtain the association relationship between the donor-DU and the IP address, etc., and further obtain the association relationship between the IP address reported by the IAB node and the donor-DU, etc.
  • the donor-CU can determine the donor-DU associated with the IP address reported by the IAB node based on the IP address of at least one donor-DU it manages; the donor-CU determines the BAP address of the donor-DU, which is the BAP address of the donor-DU associated with the IP address reported by the IAB node.
  • the donor-CU can obtain the IP address of the donor-DU it manages.
  • the donor-CU can match the IP address assigned to it by the network manager reported by the IAB node with the IP address of at least one donor-DU it manages; if the match is successful for a donor-DU, it is considered that the IP address assigned to it by the network manager reported by the IAB node is associated with the donor-DU.
  • the IP address reported by the IAB node and the IP address of the donor-DU can be compared within a certain bit range; if the two are consistent, it is considered that the two are matched successfully; otherwise, the match fails.
  • the IP address in the embodiment of the present application may be 32 bits. If the first 16 bits of the IP address of an IAB node and the IP address of a donor-DU are the same, the two IP addresses are considered to match successfully.
  • the matching rule between the IP address reported by the IAB node and the IP address of the donor-DU may be preset or configured by the OAM of the donor-CU to the donor-CU.
  • the third solution the donor-CU sends the seventh information to at least one donor-DU it manages, the seventh information includes the IP address reported by the IAB node, and the seventh information is used to inquire whether a donor-DU is associated with the IP address of the IAB node; the donor-CU receives the eighth information from the donor-DU, and the eighth information is used to indicate the IP address associated with the donor-DU; the donor-CU determines the BAP address according to the eighth information.
  • the seventh information and the eighth information can be F1AP messages.
  • the IP address can be sent to at least one donor-DU managed by it.
  • a donor-DU can determine whether the IP address is under its management. In one implementation, if the IP address is under its management, it replies to the donor-CU with association; if it is not associated, it does not reply. Alternatively, the donor-DU can also reply with no association when it is not associated, etc., without limitation. In the foregoing description, it is mainly described that the donor-DU replies with the eighth information when it is associated.
  • the BAP address of the donor-DU can be used as the BAP address of the donor-DU associated with the IP address assigned by the network manager.
  • the donor-DU can also reply to the donor-CU with an associated IP address and the identifier of the donor-DU.
  • the eighth information in the foregoing text may include, in addition to the associated indication information, the associated IP address and/or the identifier of the donor-DU, etc.
  • the identifier of the donor-DU may include at least one of the following: the identifier of the gNB-DU, the IP address of the donor-DU, or the BAP address of the donor-DU, etc.
  • the main considerations for such a design are: the network manager can allocate multiple IP addresses to the IAB node.
  • the IAB node reports all the multiple IP addresses to the donor-CU.
  • the donor-CU simultaneously inquires the donor-DUs it manages about the donor-DUs associated with the multiple IP addresses.
  • a donor-DU can be associated with some of the multiple IP addresses. Therefore, when a donor-DU replies to the association, in addition to replying to the indication information of the association, it also needs to reply to the specific IP address to which it is associated.
  • the donor-DU can also reply with the identifier of the current donor-DU.
  • step 330 the following steps may also be included:
  • the IAB node determines the BAP routing identifier corresponding to the uplink data, and the BAP routing identifier includes the BAP address.
  • the IAB node determines the IP address associated with the BAP address based on the third information; the IAB node uses the IP address as the source IP address of the uplink data.
  • the IAB node sends the uplink data to the donor-CU.
  • the donor-CU may configure an uplink mapping rule for the IAB node, and the uplink mapping rule includes at least the correspondence between ⁇ donor-CU's IP address and TEID ⁇ and ⁇ BAP routing identifier ⁇ .
  • the IAB node may first obtain the BAP routing identifier corresponding to the uplink data according to the uplink mapping rule. Afterwards, the IAB node obtains the IP address associated with the BAP address based on the BAP address of the donor-DU included in the BAP routing identifier.
  • the IP address associated with the BAP address is used as the source IP address of the uplink data, and the source IP address is carried in the uplink data, and the uplink data is sent to the next-hop IAB node. And/or, the IP address associated with the BAP address is used as the destination IP address of the downlink data and sent to the donor-CU.
  • the IAB node in the embodiment of the present application may be specifically an IAB node connected to the terminal. It is understandable that there is a peer IP layer between the IAB node connected to the terminal and the host node. Therefore, it is necessary to perform IP layer encapsulation only for the IAB node connected to the terminal. When encapsulating the IP layer, it is necessary to select an IP address that is associated with the BAP address of the donor-DU obtained in the uplink mapping rule from multiple IP addresses as the source IP address for encapsulation.
  • the IAB node when the network manager assigns an IP address to the IAB node, the IAB node can report the IP address assigned by the network manager to the donor-CU, and the donor-CU obtains the BAP address of the donor-DU associated with the IP address, and sends the corresponding BAP address to the IAB node, so that the IAB node can obtain the BAP address of the donor-DU associated with the IP address, thereby ensuring the correct transmission of uplink data.
  • the donor-CU may send a first indication to the IAB node, and the first indication is used to indicate the number of donor-DUs that the IAB node can reach, or whether the number of donor-DUs that can be reached is one.
  • the IAB node may request an IP address from the network manager; otherwise, the IAB node requests an IP address from the donor-CU.
  • the process at least includes:
  • Step 410 the donor-CU sends a first indication to the IAB node, and the IAB node receives the first indication from the donor-CU.
  • the first indication is used to indicate the number of donor-DUs that can be reached by the IAB node, or to indicate whether the number of donor-DUs that can be reached by the IAB node is one.
  • the first indication may be carried in an RRC message, for example, the donor-CU may send an RRC message to the IAB node, and the IAB node receives the RRC message from the donor-CU, and the RRC message carries the first indication.
  • the donor-CU may send the first indication to the IAB-MT.
  • the IAB node when the IAB node receives the first indication, it may determine, based on the first indication, whether the number of donor-DUs reachable by the IAB node is one. If the number of donor-DUs reachable by the IAB node is one, the IAB node sends a first request to the network management or donor-CU, and the first request may request the network management or donor-CU to allocate an IP address to the IAB node. Alternatively, if the number of donor-DUs reachable by the IAB node is multiple, the IAB node sends a second request to the donor-CU, and the second request is used to request the donor-CU to allocate an IP address to the IAB node.
  • the network management may be the OAM of the IAB node.
  • the process of the donor-CU allocating an IP address to the IAB node includes: the donor-CU sends the IP address allocated to the IAB node and the BAP address of the donor-DU associated with the IP address.
  • the process of the network manager allocating an IP address to the IAB node includes: the network manager sends the IP address allocated to the IAB node.
  • the donor-CU can request an IP address from the donor-DU that is reachable by the IAB node, and send the IP address to the IAB node. Therefore, for the design of the donor-CU allocating IP addresses to the IAB nodes, the IP address allocated by the donor-CU is managed by the reachable donor-DU, or the IP address allocated by the donor-CU to the IAB node is associated with the donor-DU that is reachable by the IAB node.
  • the BAP address of the donor-DU associated with the IP address is also sent to the IAB node.
  • the BAP address of the donor-DU associated with the IP address can be considered as the BAP address of the donor-DU that manages the IP address, that is, the BAP address of a donor-DU reachable by the IAB node.
  • the network manager when the network manager allocates an IP address to the IAB node, the network manager can obtain an IP address from a donor-DU that is reachable by the IAB node, and allocate the IP address to the IAB node. That is, when the network manager allocates an IP address to the IAB node, the IP address is actually managed by the donor-DU that is reachable by the IAB node. For example, when the network manager allocates an IP address to the IAB node, it can obtain the IP address managed by the donor-DU that is reachable by the IAB node, and allocate one or more IP addresses managed by it to the IAB node.
  • the donor-DU in uplink data transmission, when the donor-DU receives the uplink data sent by the IAB node, it will determine whether the source IP address of the uplink data is under its management. If it is managed by itself, the uplink data will be sent to the donor-CU; otherwise, the uplink data will be discarded.
  • the IAB node when the IAB node has a reachable donor-DU, the IAB node can request the donor-CU or OAM to assign an IP address to it. As mentioned earlier, when the donor-CU or OAM assigns an IP address to the IAB node, the IP address it assigns is managed by the reachable donor-DU. Therefore, the IAB node can arbitrarily select an IP address when multiple IP addresses are configured.
  • the uplink data will not be discarded by the donor-DU.
  • the IAB node needs to select an IP address associated with the BAP address of the target donor-DU as the source IP address based on the BAP address of the target donor-DU included in the BAP routing identifier obtained from the uplink mapping rule. That is, the IAB node needs to select an IP address managed by the target donor-DU as the source IP address from multiple IP addresses, thereby avoiding or reducing the discarding of uplink data when the donor-DU receives the uplink data, resulting in erroneous transmission of the uplink data.
  • the IAB node when the number of donor-DUs reachable by the IAB node is one, the IAB node can request an IP address from the network management or donor-CU; and when the number of donor-DUs reachable by the IAB node is multiple, the IAB node can request an IP address from the donor-CU, thereby ensuring the correct transmission of uplink data.
  • the donor-CU can determine the way in which the IAB node obtains the IP address according to the number of donor-DUs reachable by the IAB node, and then the donor-CU sends a second indication to the IAB node, the second indication is used to indicate the way in which the IAB node obtains the IP address, and/or indicates whether the IAB node is allowed to obtain the IP address from the network management, etc.
  • a process is provided, which at least includes:
  • Step 510 the donor-CU sends a second indication to the IAB node, and the IAB node receives the second indication from the donor-CU.
  • the second indication is used to indicate the way in which the IAB node obtains the IP address, and/or to indicate whether the IAB node is allowed to obtain the IP address from the network management, and the way in which the IAB node obtains the IP address includes obtaining the IP address from the donor-CU or obtaining the IP address from the network management.
  • the network management may be the OAM of the IAB node.
  • the donor-CU may send the second indication to the IAB-MT, and the IAB-MT receives the second indication from the donor-CU.
  • the method may further include: step 500: the donor-CU determines the number of donor-DUs that can be reached by the IAB node; the donor-CU determines a second indication based on the number of donor-DUs that can be reached by the IAB node. For example, when the number of donor-DUs that can be reached by the IAB node is one, the second indication is used to indicate that the IAB node obtains an IP address by obtaining an IP address from a network manager, or to indicate that the IAB node is allowed to obtain an IP address from a network manager.
  • the second indication is used to indicate that the IAB node obtains an IP address by obtaining an IP address from the donor-CU, and/or to indicate that the IAB node is not allowed to obtain an IP address from a network manager.
  • the IAB node when the second indication is used to indicate that the IAB node obtains the IP address from the network manager, the IAB node can obtain the IP address from the network manager. For example, the IAB node can send a third request to the network manager, and the third request is used to request the network manager to allocate an IP address to the IAB node. Further, when the network manager receives the third request, the network manager can send a third response to the IAB node, and the third response may include the IP address allocated by the network manager to the IAB node. Or,
  • the IAB node may obtain the IP address from the network manager, or may obtain the IP address from the donor-CU, etc., without limitation. For example, taking the example of the IAB node obtaining an IP address from the network manager, the IAB node sends a fourth request to the network manager, and the fourth request is used to request the network manager to allocate an IP address to the IAB node. Further, the network manager may send a fourth response to the IAB node, and the fourth response includes the IP address allocated by the network manager to the IAB node. Alternatively, taking the example of the IAB node obtaining an IP address from the donor-CU.
  • the IAB node sends a fifth request to the donor-CU, and the fifth request is used to request the donor-CU to allocate an IP address to the IAB node. Further, the donor-CU may send a fifth response to the IAB node, where the fifth response includes the IP address allocated by the donor-CU to the IAB node. Or,
  • the IAB node can obtain the IP address from the donor-CU. For example, the IAB node sends a sixth request to the donor-CU, and the sixth request is used to request the donor-CU to allocate an IP address to the IAB node. Further, the donor-CU may send a sixth response to the IAB node, and the sixth response includes the IP address allocated by the donor-CU to the IAB node. Or,
  • the second indication when the second indication is used to indicate that the IAB node obtains the IP address by obtaining the IP address from the donor-CU, and/or indicates that the IAB node is not allowed to obtain the IP address from the network management, the second indication includes the IP address of the IAB node. That is, when the donor-CU determines that the IAB node obtains the IP address by obtaining the IP address from the donor-CU, and/or indicates that the IAB node is not allowed to obtain the IP address from the network management, the donor-CU can directly allocate the IP address to the IAB node, and send the IP address to the IAB node through the second indication. The IAB node can directly obtain the IP address in the second indication.
  • the IP address is allocated by the donor-CU to the IAB node.
  • the IAB node does not need to send request information to the donor-CU to request the donor-CU to allocate the IP address to the IAB node, thereby saving the signaling overhead of the IAB node.
  • the IP address can exist independently of the second indication, for example, the donor-CU sends the second indication and the IP address of the IAB node to the IAB node.
  • the donor-CU may send an RRC message to the IAB node, where the RRC message includes the second indication and the IP address allocated by the donor-CU to the IAB node.
  • the donor-CU determines the way in which the IAB node requests the IP address, or indicates whether the IAB node is allowed to obtain the IP address from the network management, and indicates it to the IAB node, thereby ensuring the correct transmission of uplink data.
  • the network management uses the same method as the donor-CU to allocate an IP address to the IAB node. For example, when the network management allocates an IP address to the IAB node, it will carry the BAP address of the donor-DU associated with the allocated IP address. As shown in FIG6 , a process is provided, which at least includes:
  • Step 610 The network manager sends first configuration information to the IAB node, and the IAB node receives the first configuration information from the network manager.
  • the first configuration information includes an IP address allocated by the network manager to the IAB node and a BAP address of the donor-DU associated with the IP address.
  • the name of the first configuration information may be IP address allocation (IP address allocation).
  • the IAB node may report the IP address configured for it by the network manager to the donor-CU.
  • the network manager may be the OAM of the IAB node.
  • the network manager may send the first configuration information to the IAB-MT, and the IAB-MT sends the first configuration information to the IAB-DU.
  • the method further includes: step 600: the network manager allocates an IP address to the IAB node; the network manager determines the BAP address of the donor-DU associated with the IP address.
  • the method for the network manager to determine the BAP address of the donor-DU associated with the IP address includes:
  • the network management may receive the ninth information, which includes the identifier of the donor-DU and the BAP address of the donor-DU.
  • the identifier of the donor-DU includes the gNB-DU ID and/or the IP address of the donor-DU.
  • the network management determines the BAP address of the donor-DU associated with the IP address based on the ninth information.
  • the name of the ninth information may be donor-DU BAP address notification information, etc.
  • Example 1.1 The ninth information comes from the network management of the donor-CU. Taking the network management as OAM as an example, that is to say, the OAM of the donor-CU can send the ninth information to the OAM of the IAB node.
  • the donor-CU may send the identifier of the donor-DU it manages and the BAP address allocated to the donor-DU to the OAM of the donor-CU, and the OAM of the donor-CU sends the ninth information to the OAM of the IAB node, and the ninth information includes the identifier of the donor-DU and the BAP address of the donor-DU and other information.
  • the ninth information is said to be from the OAM of the donor-CU.
  • the OAM of the IAB node When the OAM of the IAB node allocates an IP address to the IAB node, it may configure an IP address in the identifier of the donor-DU to the IAB node, and when sending the IP address to the IAB node, it also sends the BAP address of the donor-DU to the IAB node.
  • Example 1.2 The ninth information comes from the network management of the donor-DU.
  • the network management is OAM, that is, the OAM of the donor-DU can send the ninth information to the OAM of the IAB node.
  • the donor-CU can send the identifier of the donor-DU it manages and the BAP address allocated to the donor-DU to the OAM of the donor-DU, and the OAM of the donor-DU then sends the above information to the OAM of the IAB node through the ninth message.
  • the ninth message is said to be from the OAM of the donor-DU.
  • the OAM of the IAB node allocates an IP address to the IAB node, it can send an IP address in the identifier of the donor-DU to the IAB node, and when sending the IP address to the IAB node, it also sends the BAP address of the donor-DU. The address is sent to the IAB node.
  • Example 2 The network management allocates a BAP address to the donor-DU connected to the IAB node.
  • the OAM of the IAB node also needs to send the BAP address allocated for the donor-DU to the donor-DU.
  • the OAM of the IAB node can send the BAP address of the donor-DU.
  • the OAM of the IAB node sends the BAP address of the donor-DU to the OAM of the donor-CU.
  • the OAM of the donor-CU sends the BAP address of the donor-DU to the donor-CU, and the donor-CU sends the BAP address of the donor-DU to the donor-DU.
  • the OAM of the IAB node can send the BAP address of the donor-DU to the OAM of the donor-DU, and the OAM of the donor-DU sends the BAP address of the donor-DU to the donor-DU.
  • the OAM of the IAB node also allocates a BAP address to the donor-DU connected to the IAB node.
  • the OAM of the IAB node can obtain the identifier of the donor-DU connected to the IAB node, and the identifier of the donor-DU includes the gNB-DU ID and/or the IP address of the donor-DU, etc.
  • the OAM of the IAB node can allocate an IP address managed by a donor-DU in the donor-DU connected to the IAB node to the IAB node, and allocate a BAP address to the connected donor-DU.
  • the OAM of the IAB node can send the identifier of the donor-DU and the BAP address allocated to it to the corresponding donor-DU.
  • the OAM of the IAB node can send the identifier of the donor-DU and the BAP address allocated to it to the OAM of the donor-CU, and the OAM of the donor-CU then sends the above information to the donor-CU, and the donor-CU sends the above information to the corresponding donor-DU through the F1AP message.
  • the OAM of the IAB node may send the identifier of the donor-DU and the BAP address allocated thereto to the OAM of the donor-DU, and the OAM of the donor-DU sends the above information to the donor-DU.
  • the IAB node further includes: in uplink data transmission: the IAB node determines the BAP routing identifier corresponding to the uplink data, the BAP routing identifier includes the BAP address; the IAB node determines the IP address associated with the BAP address according to the first configuration information; the IAB node uses the IP address associated with the BAP address as the source IP address of the uplink data; the IAB node sends the uplink data to the donor-CU. And/or, the IAB node uses the IP address associated with the BAP address as the destination IP address of the downlink data and sends it to the donor-CU.
  • the network management when the network management configures the IP address for the IAB node, it will also configure the BAP address of the donor-DU associated with the IP address, so that the IAB node can correctly obtain the association relationship between the IP address and the BAP address of the donor-DU.
  • the IAB node In the uplink data transmission, the IAB node can obtain the BAP routing identifier according to the uplink mapping rule, and select the IP address associated with the BAP address of the target donor-DU according to the BAP routing identifier as the source IP address of the uplink data, thereby avoiding or reducing the uplink data from being mistakenly discarded when it reaches the target donor-DU, and ensuring the correct transmission of the uploaded data.
  • the IAB node when the IAB node cannot determine the association between the IP address and the BAP address of the donor-DU, the IAB node can arbitrarily select an IP address from the multiple IP addresses configured by the network management as the source IP address of the uplink data.
  • One possible problem is that there is a security filtering mechanism on the donor-DU side. Take uplink data transmission as an example: when the donor-DU receives an uplink data, it will determine whether the source IP address of the uplink data is managed by it, or is called associated with it. If the source IP address of the uplink data is managed by it or associated with it, the uplink data is sent to the donor-CU, otherwise the uplink data is discarded to ensure that illegal data does not reach the donor-CU.
  • the security filtering mechanism can be configured to the donor-DU by the donor-CU, or the OAM of the donor-DU, etc.
  • the donor-DU can be configured to exempt the IP address assigned by the network management from filtering, thereby ensuring the correct transmission of data. As shown in Figure 7, a process is provided, which at least includes:
  • Step 710 The network manager allocates an IP address to the IAB node, and sends the IP address allocated to the IAB node to the IAB node, and the IAB node receives the IP address allocated to it by the network manager. Step 710 is optional.
  • the network manager may send the IP address allocated by the network manager to the IAB-MT, and the IAB-MT may send the IP address allocated by the network manager to the IAB-DU.
  • the network manager may be the OAM of the IAB node, etc.
  • Step 720 the IAB node sends the IP address allocated by the network management to the IAB node to the donor-CU, and the donor-CU receives the IP address from the IAB node.
  • the IAB-MT may send the IP address allocated by the network manager to the donor-CU.
  • Step 730 the donor-CU sends second configuration information to the donor-DU, where the second configuration information is used to configure the donor-DU to exempt the above IP address from filtering.
  • filtering-free means that when the donor-DU receives uplink data with a source IP address of IP address or downlink data with a target IP address of IP address, the uplink data or downlink data will not be discarded.
  • the security filtering mechanism mentioned above mainly describes the uplink filtering mechanism.
  • the second configuration information may explicitly indicate that the IP address is exempt from filtering.
  • the second configuration information may include a whitelist of exempted filtering, which includes at least one IP address exempt from filtering.
  • the name of the second configuration information may be an IAB transport network layer address exception (IAB TNL address exception, transport network layer, TNL) information element, which carries the IP address exempt from filtering.
  • the second configuration information may implicitly indicate that the IP address is exempt from filtering.
  • the donor-CU may configure the downlink mapping rules associated with the IP addresses of other donor-DUs to the donor-DU, so that the IP addresses assigned by the network management can also be exempted from filtering.
  • the second configuration information may instruct the donor-DU to turn off the filtering rules.
  • the donor-DU no longer performs filtering for any uplink data or downlink data.
  • uplink data transmission when the donor-DU receives uplink data from the IAB node, the uplink data is no longer filtered, and the uplink data can be sent to the donor-CU.
  • downlink data transmission when the donor-DU receives downlink data from the donor-CU, it no longer performs filtering on the downlink data and can send the downlink data to the next-hop IAB node.
  • the donor-CU when it receives the trigger of step 720, it can execute step 730 to configure the filter-free rule for the donor-DU.
  • the donor-CU configures the filter-free rule for the donor-DU.
  • the OAM of the donor-DU can also configure the filter-free rule for the donor-DU.
  • step 730 can be replaced by: the OAM of the donor-DU sends the second configuration information to the donor-DU, and the donor-DU receives the second configuration information from the OAM of the donor-DU.
  • the OAM of the donor-DU obtains the IP address configured by the OAM of the IAB node for the IAB node.
  • the OAM of the donor-DU and the OAM of the IAB node can interact with each other to obtain the IP address configured by the OAM of the IAB node for the IAB node, etc.
  • Step 740 Taking uplink transmission as an example, when the IAB node cannot determine the association between the IP address and the BAP address of the donor-DU, it arbitrarily selects an IP address from the IP addresses of the IAB node as the source IP address of the uplink data, and the IAB node sends the uplink data to the donor-DU.
  • the network management can allocate IP addresses for IAB nodes.
  • the IAB node can randomly select an IP address from the IP addresses allocated by the network management, use the IP address as the source IP address of the uplink data, and configure the donor-DU to exempt the IP address from filtering, thereby ensuring the correct transmission of the uplink data.
  • the donor-CU can randomly select an IP address from the IP addresses configured by the network management for the IAB node as the target IP address. The target IP address of the downlink data is no longer filtered for the donor-DU, thereby ensuring the correct transmission of the downlink data.
  • the IAB node, donor-DU, donor-CU and network management are described as examples of the execution entities.
  • the function of the terminal can be implemented by the terminal, or can be implemented by a module in the terminal (for example, a chip or circuit, etc.).
  • the function of the donor-DU can be implemented by the donor-DU, or by a module in the donor-DU.
  • the function of the donor-CU can be implemented by the donor-CU, or by a module in the donor-CU.
  • the function of the network management can be implemented by the network management, or by a module in the network management, etc.
  • Each of the flow charts in FIG. 3 to FIG. 7 may include fewer steps or more steps than the flow chart or text description, without limitation.
  • "(such as an IAB node) receives information from (such as a network management or a donor-CU)" can be understood as the source of the information being the network management or the donor-CU, and the destination being the IAB node, which may include the IAB node directly or indirectly receiving information from the network management or the donor-CU.
  • the information may be processed as necessary between the source and destination of the information transmission, such as format changes, but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly and will not be repeated here.
  • the methods provided in the embodiments of the present application are introduced from the perspective of the interaction between the IAB node, donor-DU, donor-CU and network management.
  • the IAB node, donor-DU, donor-CU and network management, etc. may include hardware structures and/or software modules, and implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. Whether a certain function of the above functions is executed in the form of hardware structures, software modules, or hardware structures plus software modules depends on the design constraints of the specific application of the technical solution.
  • FIGS 8 and 9 are schematic diagrams of possible devices provided in embodiments of the present application. These communication devices can implement the functions of the IAB node, donor-CU, or network management in the above method embodiments. Therefore, the beneficial effects of the above method embodiments may be achieved.
  • the communication device 800 includes a processing unit 810 and a transceiver unit 820 .
  • the processing unit 810 may also be referred to as a processor, a processing board, a processing module, a processing device, etc.
  • the transceiver unit 820 may also be referred to as a transceiver, a transceiver, a transceiver module, a transceiver device, a communication unit, etc.
  • the transceiver unit 820 may include at least one of a transmitting unit or a receiving unit. The transmitting unit and the receiving unit may be integrated together, or may be two independent units, etc.
  • communication apparatus 800 may be configured to implement the functionality of an IAB node or a donor-CU in FIG. 3 :
  • the transceiver unit 820 is used to receive first information from the network manager, and the first information includes the Internet Protocol IP address assigned by the network manager to the IAB node; the transceiver unit 820 is also used to send second information to the host node centralized unit donor-CU, and the second information includes the IP address; the transceiver unit 820 is also used to receive third information from the donor-CU, and the third information includes the backhaul link adaptation layer protocol BAP address, and the BAP address is the BAP address of the host node distributed unit donor-DU associated with the IP address.
  • the transceiver unit 820 is used to receive the second information from the IAB node, the second information includes the Internet Protocol IP address, and the IP address is the IP address assigned by the network administrator to the IAB node; the transceiver unit 820 is also used to send third information to the IAB node, the third information includes the backhaul link adaptation layer protocol BAP address, and the BAP address is the BAP address of the host node distributed unit donor-DU associated with the IP address.
  • communication apparatus 800 may be configured to implement the functionality of an IAB node or a donor-CU in FIG. 4 :
  • the transceiver unit 820 is used to receive a first indication from the host node centralized unit donor-CU, and the first indication is used to indicate the number of host node distributed units donor-DU that can be reached by the IAB node, or to indicate whether the number of donor-DU that can be reached by the IAB node is one.
  • the processing unit 810 is used to determine the number of distributed units donor-DU of the host node reachable by the access backhaul integrated IAB node; the transceiver unit 820 is used to send a first indication to the IAB node, and the first indication is used to indicate the number of donor-DUs reachable by the IAB node, or to indicate whether the number of donor-DUs reachable by the IAB node is one.
  • communication apparatus 800 may be configured to implement the functionality of an IAB node or a donor-CU in FIG. 5 :
  • the transceiver unit 820 is used to receive a second indication from the host node centralized unit donor-CU; wherein the second indication is used to indicate a method for the IAB node to obtain an Internet Protocol IP address, and/or indicate whether the IAB node is allowed to obtain an IP address from a network manager, and the method for the IAB node to obtain an IP address includes obtaining an IP address from a donor-CU or obtaining an IP address from a network manager.
  • the transceiver unit 820 is used to send a second indication to the access backhaul integrated IAB node; wherein the second indication is used to indicate the way in which the IAB node obtains an Internet Protocol IP address, and/or indicates whether the IAB node is allowed to obtain an IP address from a network manager, and the way in which the IAB node obtains an IP address includes obtaining an IP address from a donor-CU or obtaining an IP address from a network manager.
  • communication device 800 is used to implement the functions of the IAB node or network management in FIG. 6:
  • the transceiver unit 820 is used to receive the first configuration information from the network manager, and the first configuration information includes the Internet Protocol IP address assigned by the network manager to the IAB node and the backhaul link adaptation layer protocol BAP address of the host node distributed unit donor-DU associated with the IP address.
  • the processing unit 810 is used to allocate an Internet Protocol IP address to the IAB node; the network management determines the backhaul link adaptation layer protocol BAP address of the host node distributed unit donor-DU associated with the IP address; the transceiver unit 820 is used to send first configuration information to the IAB node, and the first configuration information includes the IP address allocated by the network management to the IAB node and the BAP address of the donor-DU associated with the IP address.
  • communication apparatus 800 is configured to implement the functionality of the IAB node or donor-CU in FIG. 7 :
  • the processing unit 810 is used to arbitrarily select an IP address from the IP addresses of the IAB node as the source IP address of the uplink data when the association between the Internet Protocol IP address and the backhaul link adaptation layer protocol BAP address of the host node distributed unit donor-DU cannot be determined; the transceiver unit 820 is used to send uplink data to the donor-DU.
  • the transceiver unit 820 is used to receive the Internet Protocol IP address from the IAB node, and the IP address is the IP address assigned by the network management to the IAB; the transceiver unit 820 is also used to send second configuration information to the donor-DU, and the second configuration information is used to configure the donor-DU to exempt the IP address from filtering.
  • Exemption from filtering means that when the donor-DU receives uplink data with a source IP address as the IP address or downlink data with a target IP address as the IP address, the uplink data or the downlink data will not be discarded.
  • processing unit 810 and the transceiver unit 820 For a more detailed description of the processing unit 810 and the transceiver unit 820, reference may be made to the description in the above method embodiment, which will not be repeated here.
  • each functional unit in the embodiments of the present application may be integrated into a physical device (for example, a processor), or each functional unit may be a separate physical device, or two or more units may be integrated into one unit for implementation, and the above-mentioned integrated unit may be implemented in the form of hardware, or in the form of software functional modules, etc.
  • Fig. 9 shows another schematic diagram of the structure of a communication device 900 provided in an embodiment of the present application.
  • the communication device 900 shown in Fig. 9 may be a hardware circuit implementation of the communication device 800 shown in Fig. 8.
  • Fig. 9 only shows the main parts of the communication device.
  • the communication device 900 includes a processor 910 and an interface circuit 920.
  • the processor 910 and the interface circuit 920 are coupled to each other.
  • the processor 910 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the interface circuit 920 may be a transceiver or an input-output circuit, etc.
  • the communication device 900 may further include a memory 930 for storing instructions executed by the processor 910 or storing input data required by the processor 910 to execute instructions or storing data generated after the processor 910 executes instructions.
  • instructions may also be referred to as computer programs, or computer program codes, etc.
  • the memory 930 can be a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a mobile hard disk, a compact disc ROM (CD-ROM) or any other form of storage medium known in the art.
  • RAM random access memory
  • ROM read-only memory
  • PROM programmable read-only memory
  • EPROM erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • the processor 910 is used to implement the functions of the processing unit 810, and the interface circuit 920 is used to implement the functions of the transceiver unit 820.
  • the interface circuit 920 is used to receive signals from other communication devices outside the communication device 900 and transmit them to the processor 910, or to send signals from the processor 910 to other communication devices outside the communication device.
  • the processor 910 implements the functions of the IAB node, donor-CU or network management in Figures 3 to 7 through logic circuits or execution code instructions.
  • the embodiment of the present application also provides a communication device, which includes a processor and a memory, the processor and the memory are coupled, and the processor is used to implement the functions of the IAB node, donor-CU or network management in Figures 3 to 7.
  • the processor can execute instructions in the memory so that the communication device implements one or more functions in the above-mentioned method embodiments, such as the functions implemented by the IAB node, donor-CU or network management in Figures 3 to 7.
  • the storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium can also be a component of the processor.
  • the processor and the storage medium can be located in an ASIC.
  • the ASIC can be located in the IAB node, donor-CU or network management in Figures 3 to 7.
  • the processor and the storage medium can also exist as discrete components in the IAB node, donor-CU or network management in Figures 3 to 7.
  • An embodiment of the present application further provides a communication device, which includes a processor, and the processor is used to implement the functions of the IAB node, donor-CU, or network management in Figures 3 to 7.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device.
  • the computer program or instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer program or instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a server, data center, or a computer that integrates one or more available media.
  • the computer readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile storage media.
  • the embodiment of the present application also provides a computer program product, including a computer program or an instruction, when the computer program or the instruction is run on a computer, the method of the IAB node, the donor-CU or the network management in Figures 3 to 7 is executed.
  • the computer program product includes one or more computer programs or instructions.
  • the process or function of the IAB node, the donor-CU or the network management in Figures 3 to 7 of the embodiment of the present application is executed in whole or in part.
  • the embodiment of the present application also provides a chip, which includes a processor, the processor is coupled to a memory, and the processor is used to execute a computer program or instruction stored in the memory, so that the chip implements the functions of the IAB node, donor-CU or network management in Figures 3 to 7.
  • the chip can receive information from other modules of the donor-CU (such as radio frequency or antenna, etc.), and the information can be sent by the IAB node to the donor-CU.
  • the chip can send information to other modules in the donor-CU (such as radio frequency or antenna, etc.), and the information is sent by the donor-CU to the IAB node, etc.
  • An embodiment of the present application also provides a communication system, including: a first communication device and a second communication device.
  • the first communication device can implement the function of the IAB node in Figure 3 of the previous text; the second communication device can implement the function of the donor-CU in Figure 3 of the previous text.
  • the first communication device can implement the function of the IAB node in Figure 4 of the previous text; the second communication device can implement the function of the donor-CU in Figure 4 of the previous text.
  • the first communication device can implement the function of the IAB node in Figure 5 of the previous text; the second communication device can implement the function of the donor-CU in Figure 5 of the previous text.
  • the first communication device can implement the function of the IAB node in Figure 6 of the previous text; the second communication device can implement the function of the network management in Figure 6 of the previous text.
  • the first communication device can implement the function of the IAB node in Figure 7 of the previous text; the second communication device can implement the function of the donor-CU in Figure 7 of the previous text.
  • the first communication device or the second communication device please refer to the previous description, such as the structural description in Figure 8 or Figure 9.
  • At least one means one or more, and “more than one” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • the character "/” generally indicates that the associated objects before and after are in an "or” relationship; "including at least one of A, B or C” can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé et un appareil de communication. Le procédé comprend les étapes suivantes : lorsqu'un système de gestion de réseau attribue une adresse IP à un nœud IAB, le nœud IAB peut rapporter à une CU donneuse l'adresse IP attribuée par le système de gestion de réseau, et la CU donneuse acquiert une adresse BAP d'une DU donneuse associée à l'adresse IP, et envoie l'adresse BAP correspondante au nœud IAB, de telle sorte que le nœud IAB peut acquérir l'adresse BAP de la DU donneuse associée à l'adresse IP, ce qui permet d'assurer une transmission correcte de données de liaison montante.
PCT/CN2024/095564 2023-08-25 2024-05-27 Procédé et appareil de communication Pending WO2025044334A1 (fr)

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WO2021160140A1 (fr) * 2020-02-14 2021-08-19 华为技术有限公司 Procédé de codage de réseau et appareil de communication
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