WO2023011111A1 - 路由方法和通信装置 - Google Patents

路由方法和通信装置 Download PDF

Info

Publication number
WO2023011111A1
WO2023011111A1 PCT/CN2022/104743 CN2022104743W WO2023011111A1 WO 2023011111 A1 WO2023011111 A1 WO 2023011111A1 CN 2022104743 W CN2022104743 W CN 2022104743W WO 2023011111 A1 WO2023011111 A1 WO 2023011111A1
Authority
WO
WIPO (PCT)
Prior art keywords
bap
data packet
node
iab node
iab
Prior art date
Application number
PCT/CN2022/104743
Other languages
English (en)
French (fr)
Inventor
孙飞
李奎奎
朱元萍
史玉龙
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202111101156.5A external-priority patent/CN115915330A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to AU2022321398A priority Critical patent/AU2022321398A1/en
Priority to JP2024506744A priority patent/JP2024528223A/ja
Priority to EP22851825.4A priority patent/EP4369792A4/en
Publication of WO2023011111A1 publication Critical patent/WO2023011111A1/zh
Priority to US18/431,714 priority patent/US20240179610A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update

Definitions

  • the present application relates to the technical field of communication, and in particular, to a routing method and a communication device.
  • the fifth-generation mobile communication (5th generation, 5G) and future mobile communication systems put forward more stringent requirements for various performance indicators of the network.
  • 5G has 1000 times higher capacity, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
  • the use of high-frequency small cell networking is becoming more and more popular. Due to the poor propagation characteristics of the high-frequency carrier, severe attenuation due to occlusion, and limited coverage, a large number of densely deployed small stations are required.
  • IAB Integrated access and backhaul
  • a relay node RN relay node
  • IAB node IAB node
  • the IAB donor can also be called the donor node (donor node) or the donor base station (donor gNodeB, DgNB).
  • the IAB node consists of a mobile terminal (mobile termination, MT) part and a distributed unit (distributed unit, DU) part.
  • the host base station can be an access network element with complete base station functions, or an access network element in the form of separation of a centralized unit (CU) and a distributed unit (DU).
  • the host base station is connected to the network element of the core network (for example, connected to the 5G core network) serving the UE, and provides the wireless backhaul function for the IAB node.
  • each IAB boundary node needs to route the data packets passing through it to the correct path. Therefore, how to make the IAB border node route the data packets passing through it to the correct path is a problem to be solved.
  • the embodiment of the present application discloses a routing method and a communication device, which can enable an IAB border node to route data packets passing through it to a correct path.
  • the embodiment of the present application provides a routing method, which is applied to an integrated IAB network for access and backhaul, and the IAB network includes a first BAP topology and a second BAP topology, and the first BAP topology consists of managed by a first host node, the second BAP topology is managed by a second host node, and the first host node is different from the second host node; the method may be performed by a first communication device, and the first communication device may be a communication device equipment or a communication device capable of supporting the communication equipment to implement the functions required by the method, such as a chip system.
  • the description below takes the first communication apparatus as the first IAB node as an example.
  • the method includes:
  • the first IAB node receives the first data packet; the first IAB node is managed by the first host node, at least one parent node of the first IAB node is managed by the second host node, and the first IAB node
  • the node belongs to the first BAP topology; the first IAB node processes the first data according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs Bag.
  • the first IAB node can determine whether to rewrite the BAP routing ID of the first data packet (downlink data packet) received. It should be understood that when the first IAB node can accurately determine whether to rewrite the BAP routing ID of the first data packet received, it ensures that the first data packet is routed to the correct path.
  • the first IAB node can accurately determine whether to rewrite the BAP of the first data packet received according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs. routing ID, and then route the first packet to the correct path.
  • the first IAB node processes the first data packet according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs Including: when the BAP topology corresponding to the ingress link that the first IAB node receives the first data packet is not the first BAP topology and does not meet the first condition, the first IAB node according to The second BAP routing identifier and the routing table forward the first data packet; the first condition includes: the first BAP address matches the second BAP address; the second BAP routing identifier is rewritten by rewriting the first data packet The first BAP routing identifier obtains, and the first BAP routing identifier includes the destination BAP address and path identifier of the first data packet; the first BAP address is obtained by rewriting the destination BAP address of the first data packet, The second BAP address is the BAP address assigned by the first host node to the first IAB node; or, the first BAP address is the destination B
  • the first condition can be understood as a condition for the first IAB node to determine whether to forward the first data packet when the BAP topology corresponding to the ingress link that the first IAB node receives the first data packet is not the first BAP topology. When the first condition is not met, the first IAB node forwards the first data packet.
  • the first IAB node forwards the first data packet, and rewrites The BAP routing identifier of the first data packet.
  • the first IAB node when the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is not the first BAP topology and does not meet the first condition, the first IAB node routes according to the second BAP The identification and routing table forward the first data packet; the first data packet can be routed to the correct path.
  • the first condition further includes: the first indication information contained in the first data packet indicates that the first data packet is delivered to the upper layer of the BAP layer of the first IAB node .
  • the first condition further includes: the first indication information included in the first data packet indicates that the first data packet is delivered to an upper layer of the BAP layer of the first IAB node.
  • the first data packet is delivered to the upper layer of the BAP layer only if the first instruction information indicates that the first data packet is delivered to the upper layer of the BAP layer of the first IAB node, which can avoid wrongly sending the first data packet to the upper layer of the BAP layer of the first IAB node.
  • a data packet is delivered to the upper layer of the BAP layer of the first IAB node.
  • the method before the first IAB node forwards the first data packet according to the routing table, the method further includes: the first IAB node sends the first data packet of the first data packet A BAP routing identifier is rewritten as the second BAP routing identifier; the first IAB node forwarding the first data packet according to the routing table includes: the first IAB node according to the routing table and the second BAP The routing identifier matches the next-hop BAP address, and forwards the first data packet.
  • the first IAB node forwards the first data packet according to the next-hop BAP address in the routing table that matches the second BAP routing identifier. Since the second BAP routing identifier is a BAP routing identifier recognizable by the downstream node of the first IAB node, the first IAB node forwards the first data packet according to the next-hop BAP address matched with the second BAP routing identifier in the routing table; The first data packet can be routed to the correct transmission path.
  • the first IAB node processes the first data packet according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs Including: when the BAP topology corresponding to the ingress link that the first IAB node receives the first data packet is not the first BAP topology and meets the first condition, the first IAB node sends The upper layer of the BAP layer of the first IAB node submits the first data packet; the first condition includes: the first BAP address matches the second BAP address; the first BAP address is rewritten by the first data packet The destination BAP address of the packet is obtained, and the second BAP address is the BAP address allocated by the first host node to the first IAB node; or, the first BAP address is the destination BAP of the first data packet address, the second BAP address is the BAP address allocated by the second host node to the first IAB node.
  • the BAP address of the first data packet is allocated by the second host node. Therefore, by judging whether the first condition is satisfied, the first IAB node can accurately judge whether the first data packet needs to be submitted to the upper layer of the BAP layer of the first IAB node, and then route the first data packet to the correct transmission path.
  • the first IAB node processes the first data packet according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs Including: when the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the first BAP topology and the third BAP address does not match the fourth BAP address, the The first IAB node forwards the first data packet according to the routing table; the third BAP address is the destination BAP address of the first data packet, and the fourth BAP address is the first host node for the first data packet.
  • the BAP address of the first data packet is allocated by the first host node.
  • the first IAB node can accurately judge whether to submit the first data packet to the upper layer of the BAP layer of the first IAB node, and then route the first data packet to the correct transmission path.
  • the first IAB node processes the first data packet according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs Including: when the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the first BAP topology and the third BAP address matches the fourth BAP address, the The first IAB node submits the first data packet to the upper layer of the BAP layer of the first IAB node; the third BAP address is the destination BAP address of the first data packet, and the fourth BAP address is the The BAP address allocated by the first host node to the first IAB node.
  • the BAP address of the first data packet is allocated by the first host node.
  • the first IAB node can accurately judge whether to submit the first data packet to the upper layer of the BAP layer of the first IAB node, and then route the first data packet to the correct transmission path.
  • the embodiment of the present application provides another routing method, the routing method is applied to an IAB network, the IAB network includes a first BAP topology and a second BAP topology, and the first BAP topology is managed by a first host node , the second BAP topology is managed by a second host node, the first host node is different from the second host node; the method may be performed by a second communication device, and the second communication device may be a communication device or capable of supporting communication Device A communication device that implements the functions required by the method, such as a system-on-a-chip. The following description is made by taking the second communication device as an example as the first IAB node.
  • the method includes: the first IAB node receives a second data packet from a child node of the first IAB node; the first IAB node is managed by the first host node, and at least the first IAB node A parent node is managed by the second host node, and the first IAB node belongs to the first BAP topology; the first IAB node obtains a mapping relationship with the third BAP routing identifier of the second data packet In the case of the fourth BAP routing identifier, the second data packet is forwarded according to the fourth BAP routing identifier and the routing table.
  • the first IAB node When the first IAB node obtains the fourth BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, it indicates that the third BAP routing identifier of the second data packet needs to be rewritten. That is to say, the first IAB node cannot forward the second data packet using the third BAP routing identifier. At this time, the second data packet is forwarded according to the fourth BAP routing identifier and the routing table; the second data packet can be routed to a correct transmission path.
  • the second data packet in the case of obtaining the fourth BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, can be forwarded according to the fourth BAP routing identifier and the routing table; The second data packet is routed to the correct transmission path.
  • the method further includes: if the first IAB node does not obtain the BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, according to the The third BAP routing identifier and routing table are used to forward the second data packet.
  • the first IAB node When the first IAB node does not obtain the fourth BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, it indicates that the third BAP routing identifier of the second data packet does not need to be rewritten. That is to say, when the first IAB node does not obtain the fourth BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, the first IAB node can correctly forward the second data packet according to the third BAP routing identifier .
  • the first IAB node forwards the second data packet according to the third BAP routing identifier and the routing table without obtaining the BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet ;
  • the second data packet can be routed to the correct transmission path.
  • the embodiment of the present application provides another routing method, which is applied to an IAB network, and the IAB network includes a first BAP topology and a second BAP topology, and the first BAP topology is managed by the first host node, so The second BAP topology is managed by a second host node, and the first host node is different from the second host node; the method may be executed by a third communication device, and the third communication device may be a communication device or be capable of supporting a communication device to implement Communication means for the functions required by the method, such as a system-on-a-chip.
  • the following description is made by taking the third communication device as an example as the first IAB node.
  • the method includes:
  • the first IAB node receives the first data packet; the first IAB node processes the first data packet according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs;
  • the second indication information indicates that the destination BAP address of the first data packet is allocated by the first host node, or the second indication information indicates that the destination BAP address of the first data packet is allocated by the second host node Node allocation.
  • the first IAB node can accurately determine whether to rewrite the BAP routing ID of the first data packet received according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs, and then The first data packet is routed to the correct path.
  • processing the first data packet by the first IAB node according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs includes: If the second indication information indicates that the destination BAP address of the first data packet is allocated by the second host node and the first condition is not met, the first IAB node will use the second BAP routing identifier and the routing table Forwarding the first data packet; the first condition includes: the first BAP address matches the second BAP address; the second BAP routing identifier is obtained by rewriting the first BAP routing identifier of the first data packet, The first BAP route identifier comprises the destination BAP address and path identifier of the first data packet; the first BAP address is obtained by rewriting the destination BAP address of the first data packet, and the second BAP address is the The BAP address allocated by the first host node to the first IAB node; or, the first BAP address is the destination BAP address of the first data packet, and the second BAP address is the second host
  • the first condition can be understood as a condition for the first IAB node to determine whether to forward the first data packet when the destination BAP address of the first data packet is allocated by the second host node. When the first condition is not met, the first IAB node forwards the first data packet. It should be understood that when the destination BAP address of the first data packet is allocated by the second host node and the first condition is not met, the first IAB node forwards the first data packet and rewrites the BAP routing identifier of the first data packet.
  • the first IAB node forwards the first data packet according to the second BAP routing identifier and the routing table; The first data packet can be routed to the correct path.
  • the first condition further includes: the first indication information contained in the first data packet indicates that the first data packet is delivered to the upper layer of the BAP layer of the first IAB node .
  • the first condition further includes: the first indication information included in the first data packet indicates that the first data packet is delivered to an upper layer of the BAP layer of the first IAB node.
  • the first data packet is delivered to the upper layer of the BAP layer, which can avoid mistakenly sending the first data packet to the upper layer of the BAP layer.
  • a data packet is delivered to the upper layer of the BAP layer of the first IAB node.
  • the method before the first IAB node forwards the first data packet according to the routing table, the method further includes: the first IAB node sends the first data packet of the first data packet A BAP routing identifier is rewritten as the second BAP routing identifier; the first IAB node forwarding the first data packet according to the routing table includes: the first IAB node according to the routing table and the second BAP The routing identifier matches the next-hop BAP address, and forwards the first data packet.
  • the first IAB node forwards the first data packet according to the next-hop BAP address in the routing table that matches the second BAP routing identifier. Since the second BAP routing identifier is a BAP routing identifier recognizable by the downstream node of the first IAB node, the first IAB node forwards the first data packet according to the next-hop BAP address matched with the second BAP routing identifier in the routing table; The first data packet can be routed to the correct transmission path.
  • processing the first data packet by the first IAB node according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs includes:
  • the second indication information indicates that when the destination BAP address of the first data packet is allocated by the second host node and meets the first condition, the first IAB node sends the BAP address to the BAP layer of the first IAB node
  • the upper layer of the upper layer submits the first data packet;
  • the first condition includes: the first BAP address matches the second BAP address; the first BAP address is obtained by rewriting the destination BAP address of the first data packet, so
  • the second BAP address is the BAP address allocated by the first host node to the first IAB node; or, the first BAP address is the destination BAP address of the first data packet, and the second BAP address is the BAP address allocated by the second host node to the first IAB node.
  • the first IAB node can accurately determine whether it needs to send to the upper layer of the BAP layer of the first IAB node by judging whether the first condition is satisfied.
  • the first data packet is delivered, and then the first data packet is routed to a correct transmission path.
  • processing the first data packet by the first IAB node according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs includes: When the second indication information indicates that the destination BAP address of the first data packet is allocated by the first host node and the third BAP address does not match the fourth BAP address, the first IAB node according to the routing table Forwarding the first data packet; the third BAP address is the destination BAP address of the first data packet, and the fourth BAP address is the BAP address allocated by the first host node to the first IAB node .
  • the first IAB node can accurately determine whether it needs to send the first data packet to the first host node by judging whether the third BAP address matches the fourth BAP address.
  • the upper layer of the BAP layer of the IAB node submits the first data packet, and then routes the first data packet to a correct transmission path.
  • processing the first data packet by the first IAB node according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs includes: When the second indication information indicates that the destination BAP address of the first data packet is allocated by the first host node and the third BAP address matches the fourth BAP address, the first IAB node sends the The upper layer of the BAP layer of the first IAB node submits the first data packet; the third BAP address is the destination BAP address of the first data packet, and the fourth BAP address is the first host node for the first data packet.
  • the BAP address assigned by the first IAB node includes: When the second indication information indicates that the destination BAP address of the first data packet is allocated by the first host node and the third BAP address matches the fourth BAP address, the first IAB node sends the The upper layer of the BAP layer of the first IAB node submits the first data packet; the third BAP address is the destination BAP address of the first data packet, and the fourth BAP address is the
  • the first IAB node can accurately determine whether it needs to send the first data packet to the first host node by judging whether the third BAP address matches the fourth BAP address.
  • the upper layer of the BAP layer of the IAB node submits the first data packet, and then routes the first data packet to a correct transmission path.
  • the embodiment of the present application provides another routing method, which is applied to an IAB network, and the IAB network includes a first BAP topology and a second BAP topology, and the first BAP topology is managed by a first host node, so The second BAP topology is managed by a second host node, and the first host node is different from the second host node; the method may be executed by a fourth communication device, and the fourth communication device may be a communication device or be capable of supporting a communication device to implement Communication means for the functions required by the method, such as a system-on-a-chip.
  • the description below takes the fourth communication apparatus as an example as the first IAB node.
  • the method includes:
  • the first IAB node receives the first data packet; the first IAB node processes the first data packet according to the third indication information in the first data packet; the third indication information indicates to rewrite the first data packet the BAP address of the data packet, or the third indication information indicates not to rewrite the BAP address of the first data packet.
  • the first IAB node can accurately determine whether to rewrite the BAP routing ID of the first data packet received according to the third indication information in the first data packet, and then route the first data packet to the correct path.
  • the first IAB node processing the first data packet according to the third indication information in the first data packet includes: rewriting the first data packet when the third indication information indicates When the BAP address of a data packet does not meet the first condition, the first IAB node forwards the first data packet according to the second BAP routing identifier and routing table; the first condition includes: the first BAP address Matching with the second BAP address; the second BAP routing identifier is obtained by rewriting the first BAP routing identifier of the first data packet, and the first BAP routing identifier includes the destination BAP address and Path identifier; the first BAP address is obtained by rewriting the destination BAP address of the first data packet, and the second BAP address is the BAP address allocated by the first host node to the first IAB node; or, The first BAP address is a destination BAP address of the first data packet, and the second BAP address is a BAP address allocated by the second host node to the first IAB node.
  • the first IAB node forwards the first data packet and rewrites the BAP routing identifier of the first data packet.
  • the first IAB node forwards the first data packet according to the second BAP routing identifier and the routing table; Route the first packet to the correct path.
  • the first condition further includes: the first indication information contained in the first data packet indicates that the first data packet is delivered to the upper layer of the BAP layer of the first IAB node .
  • the first condition further includes: the first indication information included in the first data packet indicates that the first data packet is delivered to an upper layer of the BAP layer of the first IAB node.
  • the first data packet is delivered to the upper layer of the BAP layer, which can avoid mistakenly sending the first data packet to the upper layer of the BAP layer.
  • a data packet is delivered to the upper layer of the BAP layer of the first IAB node.
  • the method before the first IAB node forwards the first data packet according to the routing table, the method further includes: the first IAB node sends the first data packet of the first data packet A BAP routing identifier is rewritten as the second BAP routing identifier; the first IAB node forwarding the first data packet according to the routing table includes: the first IAB node according to the routing table and the second BAP The routing identifier matches the next-hop BAP address, and forwards the first data packet.
  • the first IAB node forwards the first data packet according to the next-hop BAP address in the routing table that matches the second BAP routing identifier. Since the second BAP routing identifier is a BAP routing identifier recognizable by the downstream node of the first IAB node, the first IAB node forwards the first data packet according to the next-hop BAP address matched with the second BAP routing identifier in the routing table; The first data packet can be routed to the correct transmission path.
  • the first IAB node processing the first data packet according to the third indication information in the first data packet includes: rewriting the first data packet when the third indication information indicates When the BAP address of a data packet meets the first condition, the first IAB node submits the first data packet to the upper layer of the BAP layer of the first IAB node; the first condition includes: the first The BAP address matches the second BAP address; the first BAP address is obtained by rewriting the destination BAP address of the first data packet, and the second BAP address is that the first host node is the first IAB node An assigned BAP address; or, the first BAP address is the destination BAP address of the first data packet, and the second BAP address is the BAP address assigned by the second host node to the first IAB node.
  • the first IAB node can accurately judge whether it needs to submit the first data packet to the upper layer of the BAP layer of the first IAB node by judging whether the first condition is satisfied, Further, the first data packet is routed to the correct transmission path.
  • the processing of the first data packet by the first IAB node according to the third indication information in the first data packet includes: when the third indication information indicates not to rewrite the When the BAP address of the first data packet and the third BAP address do not match the fourth BAP address, the first IAB node forwards the first data packet according to the routing table; the third BAP address is the first A destination BAP address of a data packet, the fourth BAP address is a BAP address allocated by the first host node to the first IAB node.
  • the first IAB node can accurately judge whether it needs to send the BAP layer of the first IAB node by judging whether the third BAP address matches the fourth BAP address.
  • the upper layer of the upper layer submits the first data packet, and then routes the first data packet to a correct transmission path.
  • the processing of the first data packet by the first IAB node according to the third indication information in the first data packet includes: when the third indication information indicates not to rewrite the When the BAP address of the first data packet and the third BAP address match the fourth BAP address, the first IAB node submits the first data packet to the upper layer of the BAP layer of the first IAB node;
  • the third BAP address is the destination BAP address of the first data packet, and the fourth BAP address is the BAP address allocated by the first host node to the first IAB node.
  • the first IAB node can accurately judge whether it needs to send the BAP layer of the first IAB node by judging whether the third BAP address matches the fourth BAP address.
  • the upper layer of the upper layer submits the first data packet, and then routes the first data packet to a correct transmission path.
  • the embodiment of the present application provides a communication method, which is applied to an IAB network, and the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by a first host node, and the The second BAP topology is managed by a second host node, and the first host node is different from the second host node; the method can be performed by a fifth communication device, and the fifth communication device can be a communication device or can support the communication device to implement the Communication means for the functions required by the method, such as a system-on-a-chip.
  • the description below takes the fifth communication apparatus as the first host node as an example.
  • the method includes: the first host node sends a first data packet; the first data packet contains second indication information, and the second indication information indicates that the destination BAP address of the first data packet is determined by the first Host node allocation.
  • the first host node before sending the first data packet, the first host node generates the first data packet according to the data to be sent.
  • the first host node sends the first data packet containing the second indication information, so that the border nodes in the IAB network can accurately determine whether to rewrite the BAP routing identifier of the first data packet according to the second indication information.
  • the sending the first data packet by the first host node includes: sending the first data packet to an IAB node in the second BAP topology.
  • the data packet may not contain indication information indicating that the destination BAP address of the data packet is allocated by the first host node, which can reduce Resource overhead, no need to modify the format of the existing data packets.
  • the first host node sends the first data packet containing the second indication information to the IAB node in the second BAP topology, so that the border nodes in the IAB network can accurately judge that the first data packet needs to be rewritten according to the second indication information.
  • BAP routing identifier for a data packet for a data packet.
  • the sending the first data packet by the first host node includes: sending the first data packet to an IAB node in the first BAP topology.
  • the first host node sends the first data packet containing the second indication information to the IAB node in the first BAP topology, so that the border nodes in the IAB network can accurately judge that no rewriting is required based on the second indication information.
  • the BAP routing identifier of the first data packet is a part of the first data packet.
  • an embodiment of the present application provides a communication method, which is applied to an IAB network, where the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by a first host node, and the The second BAP topology is managed by a second host node, and the first host node is different from the second host node; the method can be executed by a sixth communication device, and the sixth communication device can be a communication device or can support the communication device to implement the Communication means for the functions required by the method, such as a system-on-a-chip.
  • the following description is made by taking the sixth communication apparatus as an example as the first host node.
  • the method includes: the first host node sends a first data packet; the first data packet contains third indication information, and the third indication information indicates rewriting the BAP address of the first data packet, or, the The third indication information indicates not to rewrite the BAP address of the first data packet.
  • the first host node before sending the first data packet, the first host node generates the first data packet according to the data to be sent.
  • the first host node sends the first data packet containing the third indication information, so that the border nodes in the IAB network can accurately determine whether to rewrite the BAP routing identifier of the first data packet according to the third indication information.
  • sending the first data packet by the first host node includes: sending the first data packet to an IAB node in the second BAP topology, and the third indication information indicates to rewrite the BAP address of the first data packet.
  • the first data packet containing the third indication information is sent to the IAB node in the second BAP topology, and the border node in the IAB network can accurately and quickly determine that it is not necessary to rewrite the first data packet according to the third indication information.
  • the BAP routing identifier of the data packet so as to route the first data packet to the correct transmission path.
  • the first host node sending the first data packet includes: sending the first data packet to an IAB node in the first BAP topology, and the third indication information indicates not to rewrite the The BAP address of the first data packet.
  • the first data packet containing the third indication information is sent to the IAB node in the first BAP topology, and the border nodes in the IAB network can accurately and quickly determine that the first data needs to be rewritten according to the third indication information
  • the BAP routing identifier of the packet so as to route the first data packet to the correct transmission path.
  • the embodiment of the present application provides a communication device, and the communication device has a function of implementing the behavior in the method embodiment of the first aspect above.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device may be a first IAB node (border node) in an IAB network, the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by a first host node, and the second BAP topology is managed by a first host node.
  • Two BAP topology is managed by a second host node, the first host node is different from the second host node, at least one parent node of the first IAB node is managed by the second host node, the first IAB A node belongs to said first BAP topology.
  • a transceiver module and a processing module are included, wherein:
  • the transceiver module is configured to receive the first data packet
  • the processing module is configured to process the first data packet according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs.
  • an embodiment of the present application provides a communication device, which has a function of implementing the behavior in the method embodiment of the second aspect above.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device may be a first IAB node in an IAB network, the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by a first host node, and the second BAP topology is managed by a Managed by a second host node, the first host node is different from the second host node, the first IAB node is managed by the first host node, at least one parent node of the first IAB node is managed by the The second host node manages that the first IAB node belongs to the first BAP topology.
  • a transceiver module and a processing module are included, wherein:
  • the transceiver module is configured to receive a second data packet from a child node of the first IAB node
  • the processing module is configured to, in the case of obtaining a fourth BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, according to the fourth BAP routing identifier and a routing table, control the The transceiver module forwards the second data packet.
  • the embodiment of the present application provides a communication device, the communication device has the function of implementing the behavior in the method embodiment of the third aspect above.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device may be a first IAB node in an IAB network, the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by a first host node, and the second BAP topology is managed by a Managed by a second host node, the first host node is different from the second host node, the first IAB node is managed by the first host node, at least one parent node of the first IAB node is managed by the The second host node manages that the first IAB node belongs to the first BAP topology.
  • a transceiver module and a processing module are included, wherein:
  • the transceiver module is configured to receive the first data packet
  • the processing module is configured to process the first data packet according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs; the second indication information indicates the first The destination BAP address of a data packet is allocated by the first host node, or the second indication information indicates that the destination BAP address of the first data packet is allocated by the second host node.
  • the embodiment of the present application provides a communication device, and the communication device has a function of implementing the behavior in the method embodiment of the fourth aspect above.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device may be a first IAB node in an IAB network, the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by a first host node, and the second BAP topology is managed by a Managed by a second host node, the first host node is different from the second host node, the first IAB node is managed by the first host node, at least one parent node of the first IAB node is managed by the The second host node manages that the first IAB node belongs to the first BAP topology.
  • a transceiver module and a processing module are included, wherein:
  • the transceiver module is configured to receive the first data packet
  • the processing module is configured to process the first data packet according to the third indication information in the first data packet; the third indication information indicates to rewrite the BAP address of the first data packet, or, the The third indication information indicates not to rewrite the BAP address of the first data packet.
  • the embodiment of the present application provides a communication device, and the communication device has a function of implementing the behavior in the method embodiment of the fifth aspect above.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device may be a first host node in an IAB network, and the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by the first host node, and the second BAP topology is managed by the second BAP topology. Managed by two host nodes, the first host node is different from the second host node.
  • a transceiver module and a processing module are included, wherein:
  • the processing module is configured to control the transceiver module to send a first data packet; the first data packet includes second indication information, and the second indication information indicates that the destination BAP address of the first data packet is determined by the First host node allocation.
  • the processing module is specifically configured to control the sending and receiving module to send the first data packet to the IAB node in the second BAP topology.
  • the embodiment of the present application provides a communication device, and the communication device has a function of implementing the behavior in the method embodiment of the sixth aspect above.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device may be a first host node in an IAB network, and the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by the first host node, and the second BAP topology is managed by the second BAP topology. Managed by two host nodes, the first host node is different from the second host node.
  • a transceiver module and a processing module are included, wherein:
  • the processing module is configured to control the transceiver module to send a first data packet; the first data packet includes third indication information, and the third indication information indicates rewriting the BAP address of the first data packet, or, The third indication information indicates not to rewrite the BAP address of the first data packet.
  • the processing module is specifically configured to control the transceiver module to send the first data packet to the IAB node in the second BAP topology, and the third indication information indicates to rewrite the The BAP address of the first data packet.
  • the processing module is specifically configured to control the transceiver module to send the first data packet to the IAB node in the first BAP topology, and the third indication information indicates not to rewrite The BAP address of the first data packet.
  • the present application provides a communication device, the communication device includes a processor, and the processor can be used to execute the computer-executed instructions stored in the memory, so that any possible implementation of the above-mentioned first aspect or the first aspect
  • the method shown in the manner is executed, or the method shown in the second aspect or any possible implementation of the second aspect is executed, or the third aspect or any possible implementation of the third aspect is executed.
  • the method shown in the above-mentioned fourth aspect or any possible implementation of the fourth aspect is executed, or the method shown in the above-mentioned fifth aspect or any possible implementation of the fifth aspect is executed.
  • the method is executed, or the method shown in the sixth aspect or any possible implementation manner of the sixth aspect is executed.
  • the process of sending information in the above method can be understood as the process of outputting information based on the instructions of the processor.
  • the processor In outputting information, the processor outputs the information to the transceiver for transmission by the transceiver. After the information is output by the processor, it may undergo additional processing before reaching the transceiver.
  • the processor receives incoming information
  • the transceiver receives that information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information may require other processing before being input to the processor.
  • the above-mentioned processor may be a processor dedicated to performing these methods, or may be a processor that executes computer instructions in a memory to perform these methods, such as a general-purpose processor.
  • the processor may also be used to execute a program stored in the memory, and when the program is executed, the communication device executes the method as shown in the first aspect or any possible implementation manner of the first aspect.
  • the memory is located outside the communication device.
  • the memory is located in the above communication device.
  • the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
  • the communication device further includes a transceiver, where the transceiver is configured to receive a message or send a message, and the like.
  • the present application provides a communication device, the communication device includes a processing circuit and an interface circuit, the interface circuit is used to acquire data or output data; the processing circuit is used to perform any of the above-mentioned first aspect or the first aspect
  • the corresponding method shown in the possible implementation manner, or the processing circuit is used to execute the corresponding method shown in the above second aspect or any possible implementation manner of the second aspect, or the processing circuit is used to execute the corresponding method shown in the above third aspect Or the corresponding method shown in any possible implementation of the third aspect, or the processing circuit is used to execute the corresponding method shown in the fourth aspect or any possible implementation of the fourth aspect, or the processing circuit is used to Execute the corresponding method as shown in the above fifth aspect or any possible implementation of the fifth aspect, or the processing circuit is used to perform the corresponding method as shown in the above sixth aspect or any possible implementation of the sixth aspect .
  • the present application provides a computer-readable storage medium, which is used to store a computer program, and when it is run on a computer, the above-mentioned first aspect or any possible implementation of the first aspect can be realized
  • the method shown in the manner is executed, or the method shown in the second aspect or any possible implementation of the second aspect is executed, or the method shown in the third aspect or any possible implementation of the third aspect is executed.
  • the method is executed, or the method shown in the fourth aspect or any possible implementation manner of the fourth aspect is executed, or the method shown in the fifth aspect or any possible implementation manner of the fifth aspect is executed, Or the method shown in the sixth aspect or any possible implementation manner of the sixth aspect is executed.
  • the present application provides a computer program product, the computer program product includes a computer program or computer code, and when it is run on a computer, the above first aspect or any possible implementation of the first aspect shows The method is executed, or the method shown in the second aspect or any possible implementation of the second aspect is executed, or the method shown in the third aspect or any possible implementation of the third aspect is executed , or make the above fourth aspect or the method shown in any possible implementation of the fourth aspect be executed, or cause the above fifth aspect or the method shown in any possible implementation of the fifth aspect to be executed, or make the above The method shown in the sixth aspect or any possible implementation manner of the sixth aspect is executed.
  • the present application provides a communication system, the communication system includes a first host node, a second host node, a first IAB node, one or more IAB nodes controlled by the first host node, and a second host node One or more IAB nodes controlled by the node; the first host node is different from the second host node, and the first IAB node is configured to execute the method in any aspect from the first aspect to the fourth aspect above.
  • FIG. 1 is a schematic structural diagram of an IAB system provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of an IAB node provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an IAB network provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a control plane protocol architecture in an IAB network provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a user plane protocol architecture in an IAB network provided by an embodiment of the present application.
  • FIG. 6 is an example of an IAB network architecture diagram provided by an embodiment of the present application.
  • FIG. 7 is an example of a BAP topology of an IAB network provided in an embodiment of the present application.
  • FIG. 8 is a flowchart of a routing method provided by an embodiment of the present application.
  • FIG. 9 is a flowchart of another routing method provided by the embodiment of the present application.
  • FIG. 10 is a flow chart of another routing method provided in the embodiment of the present application.
  • FIG. 11 is a flow chart of another routing method provided by the embodiment of the present application.
  • FIG. 12 is a flowchart of another routing method provided by the embodiment of the present application.
  • FIG. 13 is a flow chart of another routing method provided by the embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 16 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application.
  • the occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.
  • the terminal-side device is a device that provides voice and/or data connectivity to users.
  • the terminal side device may be called user equipment (user equipment, UE), terminal device, terminal, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) and so on.
  • the terminal-side device may include a handheld device with a wireless connection function, or a communication device connected to a wireless modem.
  • the terminal-side device can communicate with the core network via a radio access network (radio access network, RAN), and exchange voice and/or data with the RAN.
  • radio access network radio access network
  • terminal side equipment examples include mobile station (mobile station, MS), subscriber unit (subscriber unit), cellular phone (cellular phone), smart phone (smart phone), wireless data card, personal digital assistant (personal digital assistant, PDA), computer, tablet computer, wireless modem (modem), handheld device (handset), laptop computer (laptop computer), machine type communication (machine type communication, MTC) terminal, wearable device, vehicle-mounted terminal equipment, etc. .
  • Terminal-side devices also include limited devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities.
  • Terminal-side equipment also includes barcodes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning system (global positioning system, GPS), laser scanners and other information sensing equipment.
  • the functions of the terminal-side device may be implemented by hardware components inside the terminal device, and the hardware components may be processors and/or programmable chips inside the terminal device.
  • the chip can be realized by an application-specific integrated circuit (application-specific integrated circuit, ASIC), or a programmable logic device (programmable logic device, PLD).
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above-mentioned PLD can be a complex program logic device (complex programmable logical device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL), a system on a chip (system on a chip) , any one of SOC) or any combination thereof.
  • the donor base station (donor gNodeB), which can also be called the donor node, can access the core network through the donor node. That is to say, the donor base station is a device in the communication system that connects the terminal-side device to the core network.
  • the host base station is generally connected to the core network through a wired link (such as an optical fiber cable).
  • the host base station can be responsible for receiving the data of the core network and forwarding it to the wireless backhaul device (such as an IAB node), or receiving the data of the wireless backhaul device and forwarding it to the core network.
  • the host base station can be connected to the network in a wired manner.
  • the master base station may include a radio network controller (radio network controller, RNC), a node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS) ), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU), etc., may also include the evolved LTE system (LTE-Advanced, LTE-A) Base station (NodeB or eNB or e-NodeB, evolutional Node B), or may also include the next generation node B (next generation node) in the fifth generation mobile communication technology (fifth generation, 5G) new radio (new radio, NR) system B, gNB) and so on.
  • RNC radio network controller
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station for example, home evolved NodeB,
  • the donor base station may include a centralized unit (centralized unit, CU) (abbreviated as Donor-CU or gNB-CU in this application) and a distributed unit (distributed unit, DU) (abbreviated as Donor-DU in this application). or gNB-DU).
  • CU central unit
  • DU distributed unit
  • the gNB-CU and the gNB-DU are connected through an F1 interface, and the F1 interface may further include a control plane interface (F1-C) and a user plane interface (F1-U).
  • the Donor-CU is connected to the core network through a next generation (NG) interface.
  • NG next generation
  • the gNB-CU or the Donor-CU can also use a user plane (User plane, UP) (referred to as CU-UP in this application) and a control plane (Control plane, CP) (referred to as CU-CP in this application)
  • User plane, UP user plane
  • CP control plane
  • gNB-CU or Donor-CU consists of CU-CP and CU-UP.
  • One gNB-CU may include one gNB-CU-CP and at least one gNB-CU-UP.
  • one Donor-CU may include one Donor-CU-CP and at least one Donor-CU-UP.
  • the function of the donor base station may be implemented by hardware components inside the donor base station, for example, the above-mentioned processor and/or programmable chip inside the donor base station.
  • the chip can be realized by ASIC, or PLD.
  • the above-mentioned PLD may be any one of CPLD, FPGA, GAL, SOC or any combination thereof.
  • an IAB node can establish a wireless backhaul link with one or more upper-level nodes, and access the core network through the upper-level nodes.
  • the upper-level node can control the relay node to a certain extent (for example, data scheduling, timing modulation, power control, etc.) through various signaling.
  • the relay node can establish an access link with one or more lower-level nodes, and provide access services for one or more lower-level nodes.
  • the upper node of the relay node may be a base station or another relay node.
  • a subordinate node of a relay node may be a terminal or another relay node.
  • an upper-level node of an IAB node may also be called its upstream node or parent node, and a lower-level node of the IAB node may also be called its downstream node or child node.
  • FIG. 1 shows an IAB system, and an IAB node provides wireless access and wireless backhaul of access services for a UE.
  • the IAB donor node (IAB donor node) provides the wireless backhaul function to the IAB node, and provides the interface between the UE and the core network.
  • the IAB node is connected to the IAB donor node through a wireless backhaul link, so that the UE served by the IAB node is connected to the core network.
  • FIG. 2 shows a schematic structural diagram of an IAB node.
  • the IAB node in NR can be divided into two parts: MT and DU.
  • the MT can also be understood as a component similar to the UE.
  • the MT is called a function residing on the IAB node. Since the MT functions similarly to an ordinary UE, it can be understood that the MT is used for communication between the IAB node and the upper node.
  • the DU is relative to the CU function of the network device, and the DU is used for the communication between the IAB node and the lower-level node.
  • the upper node may be a base station or other IAB nodes
  • the lower node may be a UE or other IAB nodes.
  • the routing method provided by the embodiment of the present application can be applied to various communication systems including relay nodes, such as NR system, LTE system, LTE-A system, worldwide interoperability for microwave access (WiMAX), or wireless Local area networks (wireless local area networks, WLAN), etc.
  • a relay node is generally called an RN.
  • relay nodes are generally called IAB nodes.
  • a relay node may also be called a relay device, or a relay transmission and reception point (rTRP), and the upper node of the relay node may be a network device (including a DU of the network device, Or include the CU of the network device, etc.).
  • FIG. 3 shows an example of an IAB network including multiple UEs and multiple IAB nodes.
  • FIG. 3 takes 2 UEs and 5 IAB nodes as an example.
  • the two UEs are UE1 and UE2 respectively, and the five IAB nodes are IAB node 1-IAB node 5 respectively.
  • the thick lines in FIG. 3 indicate access links, and the thin lines indicate backhaul links.
  • UE2 may be connected to the donor base station via IAB node 5 , IAB node 2 and IAB node 1 .
  • UE2 may also be connected to the donor base station via IAB node 4 , IAB node 2 and IAB node 1 .
  • UE2 may also be connected to the donor base station via IAB node 4 , IAB node 3 and IAB node 1 .
  • UE1 can be connected to the donor base station via IAB node 4 , IAB node 3 and IAB node 1 .
  • UE1 can be connected to the donor base station via IAB node 4 , IAB node 2 and IAB node 1 .
  • an IAB node may generally refer to any node or device with a relay function, and the use of the IAB node and relay node in the implementation of the present application should be understood to have the same meaning.
  • the IAB nodes are connected to the core network via the IAB host node.
  • the IAB node under the 5G architecture of the standalone network (standalone, SA), the IAB node is connected to the 5G core network (5G core network, 5GC/5GCN) via the IAB host node.
  • the IAB node Under the 5G architecture of dual connectivity (DC) or multi-connectivity (MC) (for example: non-standalone, NSA scenarios, etc.), on the main path, the IAB node It can be connected to the evolved packet core network (evolved packet core, EPC) through the evolved base station (evolved NodeB, eNB), and can also be connected to the 5G core network through the IAB host.
  • EPC evolved packet core network
  • eNB evolved NodeB
  • one or more IAB nodes may be included on a transmission path between the UE and the IAB host.
  • Each IAB node needs to maintain a wireless backhaul link facing the parent node, and also needs to maintain a wireless link with the child nodes. If the child node of the IAB node is a UE, there is a wireless access link between the IAB node and its child node (that is, the UE). If the child nodes of the IAB node are other IAB nodes, there is a wireless backhaul link between the IAB node and its child nodes (that is, other IAB nodes).
  • UE1 accesses IAB node 4 through a wireless access link, and IAB node 4 connects to The IAB node 3 is connected to the IAB node 1 through a wireless backhaul link, and the IAB node 1 is connected to the IAB host node through a wireless backhaul link.
  • the access IAB node refers to the IAB node accessed by the UE
  • the intermediate IAB node refers to the IAB node that provides wireless backhaul service for the UE or the IAB node.
  • IAB node 4 is the access IAB node
  • IAB node 3 and IAB node 1 are intermediate IAB nodes.
  • an IAB node is an access IAB node for UEs accessing the IAB node; it is an intermediate IAB node for UEs accessing other IAB nodes. Therefore, an IAB node is specifically an access IAB node It is still an intermediate IAB node, which is not fixed and can be determined according to specific application scenarios.
  • the F1 interface can include two parts: the control plane and the user plane, where the user plane is maintained between IAB-DU and IAB donor CU-UP, and the control plane is maintained between IAB-DU and IAB donor CU-CP of.
  • the F1 interface may also be called an F1* interface, and this embodiment of the present application does not limit the name of the interface.
  • the interface is referred to as an F1 interface as an example.
  • the F1 interface can support user plane protocols (F1-U/F1*-U) and control plane protocols (F1-C/F1*-C), and the user plane protocols include one or more of the following protocol layers: general packet radio service (general packet radio service, GPRS) tunneling protocol user plane (GPRS tunneling protocol user plane, GTP-U) protocol layer, user datagram protocol (user datagram protocol, UDP) protocol layer, Internet protocol (internet protocol, IP) protocol layer, etc. ;
  • the control plane protocol includes one or more of the following protocol layers: F1 application protocol (F1 application protocol, F1AP), stream control transport protocol (stream control transport protocol, SCTP), IP protocol layer, etc.
  • the IAB node and the IAB host can perform interface management, manage the IAB-DU, and perform UE context-related configuration, etc.
  • functions such as user plane data transmission and downlink transmission status feedback can be performed between the IAB node and the IAB host.
  • FIG. 4 is a schematic diagram of a control plane protocol architecture in an IAB network
  • FIG. 5 is a schematic diagram of a user plane protocol architecture in an IAB network.
  • a Uu interface is established between UE1 and IAB2-DU, and the peer-to-peer protocol layers include a radio link layer control protocol (radio link control, RLC) layer, a media access control layer ( media access control (MAC) layer and physical layer (physical layer, PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical layer
  • IAB2-DU and IAB donor CU 1 establish an F1-C interface
  • the peer protocol layers include F1AP layer and SCTP layer.
  • the IAB donor DU 1 and the IAB donor CU 1 are connected through a cable, and the peer-to-peer protocol layers include the Internet protocol (internet protocol, IP) layer, L2 and L1.
  • IP Internet protocol
  • the peer-to-peer protocol layer includes the backhaul adaptation protocol (bakhaul adaptation) protocol, BAP) layer, RLC layer, MAC layer and PHY layer.
  • BAP backhaul adaptation protocol
  • RLC backhaul adaptation protocol
  • MAC media access control
  • PHY PHY layer
  • peer-to-peer radio resource control (radio resource control, RRC) layer and packet data convergence protocol (packet data convergence protocol, PDCP) layer established between UE1 and IAB donor CU 1, between IAB2-DU and IAB donor DU 1
  • a peer-to-peer IP layer is established between them.
  • the DU connected to the IAB node realizes the function of the gNB-DU of the single air interface (that is, establishes peer-to-peer RLC layer, MAC layer and the functions of the PHY layer, as well as the functions of the F1AP layer and the SCTP layer that establish peer-to-peer relationships with the CU). That is to say, the DU connected to the IAB node in the IAB network implements the function of the gNB-DU with a single air interface; the IAB donor CU implements the function of the gNB-CU with a single air interface.
  • the RRC message is encapsulated and transmitted in the F1AP message between the access IAB node and the IAB donor CU.
  • UE1 encapsulates the RRC message in a PDCP protocol data unit (protocol data unit, PDU), and sends it to the IAB2-DU after being processed by the RLC layer, the MAC layer, and the PHY layer in sequence.
  • the IAB2-DU is sequentially processed by the PHY layer, the MAC layer, and the RLC layer to obtain a PDCP PDU, and the PDCP PDU is encapsulated in an F1AP message, and then processed by the SCTP layer and the IP layer to obtain an IP packet.
  • the IAB2-MT sends the IP packet to the IAB3-DU after being processed by the BAP layer, the RLC layer, the MAC layer and the PHY layer respectively.
  • IAB3-DU obtains an IP packet after being processed by the PHY layer, MAC layer, RLC layer and BAP layer in turn, and then IAB3-MT adopts an operation similar to IAB2-MT to send the IP packet to IAB1-DU.
  • IAB1-MT sends the IP packet to IAB donor DU 1.
  • the IAB donor DU 1 parses and obtains the IP packet, it sends the IP packet to the IAB donor CU 1, and the IAB donor CU 1 processes the IP packet through the SCTP layer, the F1AP layer, and the PDCP layer in turn to obtain the RRC message.
  • the downlink direction is similar and will not be described here.
  • a Uu interface is established between UE1 and IAB2-DU, and the peer-to-peer protocol layers include RLC layer, MAC layer and PHY layer.
  • the IAB2-DU and the IAB donor CU 1 establish an F1-U interface, and the equivalent protocol layers include a GTP-U layer and a user datagram protocol (UDP) layer.
  • IAB donor DU 1 and IAB donor CU 1 are connected by wire, and the peer-to-peer protocol layers include IP layer, L2 and L1.
  • BL is established between IAB node 2 and IAB node 3, between IAB node 3 and IAB node 1, and between IAB node 1 and IAB donor DU 1, and the peer protocol layers include BAP layer, RLC layer, and MAC layer and the PHY layer.
  • a peer-to-peer SDAP layer and PDCP layer are established between UE1 and IAB donor CU 1, and a peer-to-peer IP layer is established between IAB2-DU and IAB donor DU 1.
  • the DU of the IAB access node realizes some functions of the gNB-DU of the single air interface (that is, establishes peer-to-peer RLC layer, MAC Layer and PHY layer functions, and establish peer-to-peer GTP-U layer, UDP layer functions with IAB donor CU 1). It can be understood that the DU of the IAB access node implements the function of the gNB-DU with a single air interface; the IAB donor CU implements the function of the gNB-CU with a single air interface.
  • PDCP packets are encapsulated and transmitted in the GTP-U tunnel between the access IAB node and the IAB donor CU.
  • the GTP-U tunnel is established on the F1-U interface.
  • IAB node includes MT part and DU part, IAB donor can be further divided into DU and CU part, CU can also be divided into CU-CP and CU-UP part.
  • FIG. 6 is an example of an IAB network architecture diagram provided by an embodiment of the present application. Figure 6 shows an example of an IAB node connected to an IAB donor through a wireless backhaul link.
  • Figure 6 takes 1 UE, 2 IAB nodes and 2 IAB donors as an example.
  • the two IAB nodes are IAB node 1 and IAB node 2, both of which include MT part and DU part; the two IAB donors are IAB donor 1 and IAB donor 2 respectively.
  • the two IAB donors are IAB donor 1 and IAB donor 2.
  • Each IAB donor can be further divided into DU and CU parts, and CU can also be divided into CU-CP and CU-UP parts.
  • wireless backhaul is used between the MT of IAB node 2 and the DU of IAB node 1, between the MT of IAB node 1 and the DU of IAB donor 1, and between the MT of IAB node 1 and the DU of IAB donor 2 (backhual, BH) link (link) communication;
  • Uu interface is established between UE and IAB2-DU;
  • F1-C interface is established between IAB donor DU and IAB donor CU-CP, IAB donor DU and IAB donor CU-
  • the IAB node When the IAB node works in SA mode, the IAB node can be single-connected to one parent node, or dual-connected to two parent nodes.
  • the two parent nodes can be controlled by the same IAB donor, or controlled by different IAB donors. It is enough to establish an F1 interface between the DU part of the IAB node and an IAB donor.
  • the IAB donor can be connected to the 5G core network, which is the dotted line in Figure 6.
  • the IAB-donor-CU-CP is connected to the control plane network elements (such as access and mobility management functions) in the 5GC through the NG control plane interface (NG-C), and the IAB-donor-CU-UP is connected through the NG user plane interface (NG-U) is connected to user plane network elements (eg user plane functions) in 5GC.
  • control plane network elements such as access and mobility management functions
  • NG-C NG control plane interface
  • NG-U NG user plane interface
  • user plane network elements eg user plane functions
  • the IAB-donor-CU-UP can be connected to the EPC (for example, connected to the serving gateway (SGW)) through the S1 user plane interface (S1-U), the MT of the MeNB and the IAB node There is an LTE Uu air interface connection between them, there is an X2-C interface between the MeNB and the IAB-donor-CU-CP, and the MeNB is connected to the EPC through the S1 interface (including the S1 interface user plane and the S1 interface control plane).
  • SGW serving gateway
  • S1-U S1 user plane interface
  • the MeNB is connected to the EPC through the S1 interface (including the S1 interface user plane and the S1 interface control plane).
  • the MeNB in Figure 6 can also be replaced with a 5G base station gNB.
  • the LTE-Uu interface in Figure 6 is replaced by the NR-Uu interface accordingly.
  • the gNB can establish a user plane and/or control plane interface with the 5GC.
  • the gNB and IAB-donor provide dual connectivity services for the IAB node.
  • the gNB can The role of the primary base station as the IAB node, or the role of the secondary base station.
  • the routing method provided by this application is used to solve the data forwarding problem of the boundary node (boundary node) in the IAB network.
  • the routing method provided by the present application is used to solve the problem of how the border node in the IAB network routes the data packets passing through it to the correct path.
  • the border nodes in the IAB network may be referred to as border IAB nodes, or border nodes for short.
  • the border node in the IAB network has the following characteristics: the IAB-donor-CU where the DU of the border node is terminated is different from the IAB-donor-CU where the DU of at least one parent node is terminated.
  • Boundary IAB node can be defined as follows: IAB-node, whose IAB-DU is terminated to a different IAB-donor-CU than a parent DU. Assuming that an IAB node in the IAB network has two parent nodes, the DU of the IAB node terminates in the CU of IAB-donor 1, the DU of a parent node of the IAB node terminates in the CU of IAB-donor 1, and the DU of the IAB node terminates in the CU of IAB-donor 1. The DU of another parent node terminates at the CU of IAB-donor 2, then the IAB node is a border node.
  • FIG. 7 is an example of a BAP topology of an IAB network provided by an embodiment of the present application.
  • the BAP topology refers to the topology of the BAP layer.
  • IAB-MT1 and IAB-DU1 are two parts that IAB node 1 includes
  • IAB-MT2 and IAB-DU2 are two parts that IAB node 2 includes
  • IAB-MT3 and IAB-DU3 are two parts that IAB node 3 includes.
  • IAB-MT4 and IAB-DU4 are two parts included in IAB node 4.
  • the topology in the solid line box represents the BAP topology 1 controlled by Donor-CU1 and the topology in the dotted line box represents the BAP topology 2 controlled by Donor-CU2.
  • BAP topology 1 includes IAB node 1 , IAB node 2 and IAB node 4 ;
  • BAP topology 2 includes IAB node 3 .
  • the MT of IAB node 2, ie, IAB-MT2 is respectively connected to Donor-DU1 and Donor-DU2 through dual connections.
  • the F1 interface of the IAB node 2 is terminated at CU1, that is, CU1 is the F1-termination node of the IAB node 2.
  • the service of an IAB node or the service of a UE connected under the IAB node may be transmitted via several different types of nodes.
  • These different types of nodes may include IAB nodes managed by CU1 (for example, IAB node 4 ), and IAB nodes managed by CU2 (for example, IAB node 3 ).
  • IAB node 2 can receive the data packet sent by CU1 via Donor-DU1 and IAB node 1 (see the path indicated by the solid arrow in Figure 7), and can also receive the data packet sent by CU1 via Donor-DU2 and IAB node 3 delivered data packets (refer to the path indicated by the dotted arrow in FIG. 7 ).
  • the IAB node 2 is a boundary node in the IAB network shown in FIG. 7 . Because the F1 interface of IAB node 2 is terminated in CU1 (the DU of IAB node 2 is terminated in CU1), the DU of one parent node of IAB node 2 (IAB node 3) is terminated in CU2.
  • the IAB node 2 needs to route the data packets passing through it to the correct path.
  • the BAP routing ID identifiable by each IAB node in BAP topology 1 controlled (or managed) by CU1 and the BAP routing ID identifiable by each IAB node in BAP topology 2 controlled (or managed) by CU2 The IDs are different. That is to say, the BAP routing ID recognizable by each IAB node in BAP topology 1 is not identifiable for each IAB node in BAP topology 2 controlled (or managed) by CU2. Similarly, the BAP routing ID recognizable by each IAB node in BAP topology 2 is not identifiable to each IAB node in BAP topology 1 controlled by CU1.
  • IAB node 2 For the downlink data packet, IAB node 2 needs to rewrite the BAP routing ID of the data packet from BAP topology 2, and convert it into a BAP routing ID recognizable by the IAB node in BAP topology 1 before forwarding it to the downstream node. Similarly, for uplink data packets, if the data packet received by IAB node 2 needs to be transmitted through BAP topology 2, then IAB node 2 needs to change the original BAP routing ID rewriting in BAP topology 1 of the data packet to the IAB in BAP topology 2 The BAP routing ID that the node can recognize can be forwarded to its upstream IAB node in BAP topology 2.
  • the border node eg IAB node 2 in the IAB network
  • the border node eg IAB node 2
  • the routing method can accurately determine whether the BAP routing ID of the rewriting data packet is needed, and route the data packet passing through the border node to the correct path.
  • FIG. 8 is a flow chart of a routing method provided by an embodiment of the present application.
  • the routing method provided by the embodiment of the present application can be applied to an IAB network, the IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by the first host node, and the second BAP topology is managed by the second host node management, the first host node is different from the second host node.
  • the method includes:
  • the first IAB node receives a first data packet.
  • the first IAB node is managed by the first host node, and at least one parent node of the first IAB node is managed by the second host node. That is to say, the first IAB node is a border node in the IAB network.
  • the first IAB node belongs to the first BAP topology.
  • the first data packet may be a downlink data packet, that is, a data packet from an upstream node of the first IAB node.
  • the IAB network shown in FIG. 7 may be an example of an IAB network to which the method in FIG. 8 is applicable.
  • the first BAP topology corresponds to BAP topology 1
  • the second BAP topology corresponds to BAP topology 2
  • the first host node corresponds to CU1
  • the second host node corresponds to CU2
  • the first IAB node corresponds to IAB node 2.
  • the above method further includes: when a radio link failure (radio link failure, RLF) occurs on the first radio link between the first IAB node and its parent node, the first IAB The node sends fourth indication information to its child node during or before recovery (recovery) of the first wireless link; the fourth indication information indicates the time when RLF occurs in the first IAB node and sends the fourth indication information During or before restoring the above-mentioned first wireless link.
  • the strength of the fourth indication information may be a BAP address (addrese) or a backhaul (backhual, BH) link (link).
  • the first IAB node may notify its child nodes in time that RLF occurs between the first IAB node and its parent node. Further, after the first wireless link between the first IAB node and the first parent node is successfully restored, the first IAB node sends fifth indication information to its child nodes; the fifth indication information indicates that the above The RLF recovery of the first IAB node succeeds. In this implementation manner, the first IAB node sends fifth indication information to its child nodes; it may notify its child nodes that the RLF recovery is successful.
  • the first IAB node processes the first data packet according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs.
  • the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet may be the BAP topology to which the IAB node that sends the first data packet to the first IAB node belongs.
  • the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet may be one of the first BAP topology and the second BAP topology.
  • after the first IAB node receives the first data packet it may use the BAP topology to which the IAB node sending the first data packet belongs to as the BAP topology corresponding to the ingress link receiving the first data packet.
  • the first IAB node receives the first data packet sent by its upstream node 1, and the BAP topology to which the upstream node 1 belongs is the BAP topology corresponding to the first IAB node according to the ingress link receiving the first data packet. Since the BAP topology to which the IAB node that sends the first data packet to the first IAB node belongs is the same as the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet, step 801 can be replaced by: the first IAB node The first data packet is processed according to the BAP topology to which the IAB node sending the first data packet belongs and the BAP topology to which the first IAB node belongs.
  • the first IAB node knows the BAP topology to which it belongs. In some embodiments, the first IAB node belongs to the first BAP topology, that is, the BAP topology to which the first IAB node belongs is the first BAP topology. In some embodiments, the configuration information in the first IAB node indicates the BAP topology to which the first IAB node belongs. In these embodiments, the first IAB node can determine the BAP topology it belongs to according to its configuration information.
  • the ingress link (ingress link) that the first IAB node receives the downlink data packet may comprise the first ingress link and the second ingress link, the BAP topology corresponding to the first ingress link is the first BAP topology, the second ingress link The BAP topology corresponding to the ingress link is the second BAP topology.
  • the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the first BAP topology; if the first IAB node If the first data packet is received through the second ingress link, the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the second BAP topology.
  • the first IAB node may store a first correspondence between the first ingress link and the first BAP topology and a second correspondence between the second ingress link and the second BAP topology, and the first IAB node according to The first correspondence may determine that the first ingress link corresponds to the first BAP topology, and the first IAB node may determine that the second ingress link corresponds to the second BAP topology according to the second correspondence.
  • the first IAB node may store the correspondence between each ingress link and its corresponding BAP topology, and the first IAB node may determine the corresponding The BAP topology.
  • step 802 may be replaced by: the first IAB node processes the first data packet according to the second indication information in the first data packet and the BAP topology to which the first IAB node belongs.
  • the second indication information indicates that the destination BAP address of the first data packet is allocated by the first host node.
  • the second indication information indicates that the destination BAP address of the first data packet is allocated by the second host node.
  • the second indication information may be included in the header of the first data packet.
  • the second indication information may be additional indication information (occupying one or more bits) added to the existing BAP address.
  • the second indication information is two extra bits added to the existing BAP address; if the second indication information is 00, the second indication information indicates that the destination BAP is allocated by the first host node; if the If the second indication information is 11, the second indication information indicates that the target BAP is allocated by the second host node.
  • the second indication information indicates that the destination BAP address of the first data packet is allocated by the first host node, it indicates that the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the first BAP Topology; if the second indication information indicates that the destination BAP address of the first data packet is allocated by the second host node, it indicates that the BAP topology corresponding to the ingress link of the first IAB node receiving the first data packet is the second BAP topology .
  • the first IAB node can determine whether to rewrite the BAP routing ID of the first data packet according to the second indication information and the BAP topology to which the first IAB node belongs. For example, the first IAB node judges the BAP routing ID of rewriting the first data packet when it belongs to the first BAP topology and the second indication information indicates that the destination BAP address of the first data packet is allocated by the second host node. For another example, when the first IAB node belongs to the first BAP topology and the second indication information indicates that the destination BAP address of the first data packet is allocated by the first host node, it judges not to rewrite the BAP routing of the first data packet ID.
  • the first host node and the second host node forward the downlink data packet through the BAP topology controlled by the other party, they indicate (for example, through the second indication information) which host node the BAP address of the downlink data packet belongs to. assigned by the node.
  • the border node for example, the first IAB node
  • the border node receives the downlink data packet, it can directly determine whether operations such as rewriting need to be performed.
  • step 802 may be replaced by: the first IAB node processes the first data packet according to the third indication information in the first data packet; the third indication information indicates rewriting the destination BAP address of the first data packet , or, the third indication information indicates not to rewrite the destination BAP address of the first data packet.
  • the above-mentioned third indication information indicating rewriting of the destination BAP address of the above-mentioned first data packet may be understood as the above-mentioned third indication information indicating that the destination BAP address of the above-mentioned first data packet is a fake BAP address.
  • the third indication information indicating not to rewrite the destination BAP address of the first data packet can be understood as the third indication information indicating that the destination BAP address of the first data packet is a real BAP address (not a fake BAP address).
  • the third indication information may occupy one or more bits in the packet header of the first data packet.
  • the third indication information may be additional indication information (occupying one or more bits) added to the existing BAP address.
  • the third indication information is two additional bits added to the existing BAP address; if the third indication information is 00, then the third indication information indicates not to rewrite the destination BAP address of the first data packet ; If the third indication information is 11, then the third indication information indicates rewriting the destination BAP address of the first data packet.
  • the first IAB node can determine whether to rewrite the BAP routing ID of the downlink data packet. It should be understood that the first IAB node can ensure that the first data packet is routed to the correct path only when it can accurately determine whether to rewrite the BAP routing ID of the first data packet received.
  • the first IAB node can accurately determine whether to rewrite the BAP routing of the first data packet received according to the BAP topology corresponding to the ingress link receiving the first data packet and the BAP topology to which the first IAB node belongs. ID, and then route the first packet to the correct path.
  • step 802 Some possible examples of step 802 are introduced below.
  • the first IAB node forwards the first IAB node according to the second BAP routing identifier and the routing table.
  • a data packet; the above-mentioned first condition includes: the first BAP address matches the second BAP address; the above-mentioned second BAP routing identifier is obtained by rewriting the first BAP routing identifier of the above-mentioned first data packet, and the above-mentioned first BAP routing identifier includes The destination BAP address and path identifier of the above-mentioned first data packet;
  • the above-mentioned first BAP address is obtained by rewriting the destination BAP address of the above-mentioned first data packet, and the above-mentioned second BAP address is the BAP address allocated by the above-mentioned first host node for the above-mentioned first IAB node;
  • the first BAP address is the destination BAP address of the first data packet
  • the second BAP address is the BAP address allocated by the second host node to the first IAB node.
  • the match between the first BAP address and the second BAP address may be the same as the first BAP address and the second BAP address, or may satisfy a specific mapping relationship between the first BAP address and the second BAP address, which is not limited in this application.
  • the matching of two addresses may mean that the two addresses are the same, or it may mean that the two addresses satisfy a specific mapping relationship, which is not limited in this application.
  • the first IAB node can rewrite (rewriting) the destination BAP address of the first data packet to obtain the first BAP address.
  • the first BAP address is a BAP address recognizable by the IAB nodes in the second BAP topology.
  • the first IAB node may perform the following operations: the first IAB node routes the first BAP of the first data packet The identifier is rewritten as the second BAP routing identifier.
  • the first IAB node looks up the second BAP routing identifier corresponding to the first BAP routing identifier of the first data packet in the rewriting table (rewriting table), and the BAP address contained in the second BAP routing identifier is the first BAP address .
  • the forwarding of the first data packet by the first IAB node according to the second BAP routing identifier and the routing table may be: the first IAB node forwards the above-mentioned first data packet according to the next-hop BAP address matching the second BAP routing identifier in the routing table . If the routing table does not contain the next-hop BAP address matching the routing identifier of the second BAP, the first data packet is discarded.
  • the first condition can be understood as a condition for the first IAB node to determine whether to forward the first data packet when the BAP topology corresponding to the ingress link that the first IAB node receives the first data packet is not the first BAP topology. If the first condition is met, the first IAB node delivers the first data packet to the upper layer of the BAP layer of the first IAB node; if the first condition is not met, the first IAB node forwards the first data packet. Whether the BAP topology corresponding to the ingress link receiving the first data packet by the first IAB node is the first BAP topology can be understood as a condition for rewriting the BAP routing identifier of the first data packet.
  • the first IAB node does not need to rewrite the BAP routing identifier of the first data packet; if the first IAB node receives the first data packet If the BAP topology corresponding to the ingress link of the packet is not the first BAP topology, the first IAB node can rewrite the BAP routing identifier of the first data packet, and use the rewritten BAP routing identifier to forward the first data packet.
  • the first condition further includes: the first indication information included in the first data packet indicates that the first data packet is delivered to an upper layer of the BAP layer of the first IAB node.
  • the first indication information may be included in the path identifier included in the first data packet.
  • the first indication information may be additional indication information (occupying one or more bits) added to the existing path identifier. For example, the first indication information is two additional bits added to the existing path identifier; if the first indication information is 00, the first indication information indicates not to hand over to the upper layer; if the first indication information is 11, then the first indication information indicates to deliver the upper layer (that is, deliver the first data packet to the upper layer). In this implementation manner, it is possible to avoid wrong delivery of the first data packet to the upper layer of the BAP layer of the first IAB node.
  • the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is not the first BAP topology. It can be replaced by: the second indication information in the first data packet indicates the purpose of the first data packet The BAP address is allocated by the second host node, or the third indication information in the first data packet indicates the destination BAP address for rewriting the first data packet.
  • Example 1 when the BAP topology corresponding to the ingress link that the first IAB node receives the first data packet is not the first BAP topology and does not meet the first condition, the first IAB node identifies the route according to the second BAP forwarding the first data packet with the routing table; the first data packet can be routed to the correct path.
  • the first IAB node submits the first IAB node to the upper layer of the BAP layer of the first IAB node.
  • a data packet; the above-mentioned first condition includes: the first BAP address matches the second BAP address;
  • the above-mentioned first BAP address is obtained by rewriting the destination BAP address of the above-mentioned first data packet, and the above-mentioned second BAP address is the BAP address allocated by the above-mentioned first host node for the above-mentioned first IAB node;
  • the first BAP address is a destination BAP address of the first data packet
  • the second BAP address is a BAP address allocated by the second host node to the first IAB node.
  • the first BAP address is obtained by rewriting the destination BAP address of the first data packet, the first BAP address is a BAP address recognizable by the first IAB node (corresponding to the BAP address allocated by the first host node for the first IAB node) .
  • the first BAP address matches the BAP address assigned by the first host node to the first IAB node, it can be accurately judged whether the first data packet needs to be delivered to the upper layer of the BAP layer of the first IAB node.
  • the BAP address of the first data packet is allocated by the second host node. Therefore, whether the first IAB node matches the BAP address allocated by the first IAB node by judging the destination BAP address of the first data packet and the second host node for the distribution of the first IAB node, it can be accurately judged whether it is necessary to send a message to the upper layer of the BAP layer of the first IAB node. Submit the first packet.
  • Example 2 when the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is not the first BAP topology and satisfies the first condition, the first IAB node sends the BAP link to the first IAB node
  • the upper layer of the layer delivers the first data packet; the first data packet can be routed to the correct path.
  • the above-mentioned first IAB node forwards the above-mentioned The first data packet; the third BAP address is the destination BAP address of the first data packet, and the fourth BAP address is the BAP address allocated by the first host node to the first IAB node.
  • the BAP address of the first data packet is allocated by the first host node. By judging whether the third BAP address matches the fourth BAP address, the first IAB node can accurately judge whether to submit the first data packet to the upper layer of the BAP layer of the first IAB node.
  • the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the first BAP topology, which can be replaced by: the second indication information in the first data packet indicates the destination BAP of the first data packet The address is allocated by the first host node, or the third indication information in the first data packet indicates not to rewrite the destination BAP address of the first data packet.
  • the first IAB node sends the The upper layer of the BAP layer of the first IAB node submits the above-mentioned first data packet;
  • the above-mentioned third BAP address is the destination BAP address of the above-mentioned first data packet, and the above-mentioned fourth BAP address is that the above-mentioned first host node distributes for the above-mentioned first IAB node The BAP address.
  • the BAP address of the first data packet is allocated by the first host node. By judging whether the third BAP address matches the fourth BAP address, the first IAB node can accurately judge whether to submit the first data packet to the upper layer of the BAP layer of the first IAB node.
  • FIG. 9 is a flow chart of another routing method provided by the embodiment of the present application.
  • the method flow in FIG. 9 is a possible implementation of the method flow in FIG. 8 .
  • the method includes:
  • the first IAB node receives a first data packet.
  • the first IAB node determines whether the first data packet is from the second BAP topology.
  • step 903 If yes, go to step 903; if not, go to step 904. If the first packet is from an IAB node belonging to the second BAP topology, then the first IAB node judges that the first packet is from the second BAP topology; if the first packet is not from an IAB node belonging to the second BAP topology, then the first The IAB node determines that the first data packet does not come from the second BAP topology.
  • Step 902 may be replaced by: the first IAB node judges whether the first data packet is from the first BAP topology. If yes, go to step 904; if not, go to step 903.
  • Step 902 may be replaced by: judging whether the first data packet is from a secondary cell group (SCG). If yes, go to step 903; if not, go to step 904.
  • step 902 may be replaced by: judging whether the first data packet is from a master cell group (master cell group, MCG). If yes, go to step 904; if not, go to step 903. Wherein, the first IAB node belongs to the MCG.
  • Step 902 may be replaced by: judging whether the first data packet is from the SCG. If yes, go to step 904; if not, go to step 903. Alternatively, step 902 may be replaced by: judging whether the first data packet is from the MCG. If yes, go to step 903; if not, go to step 904. Wherein, the first IAB node belongs to the SCG.
  • step 902 may be replaced by: judging whether the topology ID corresponding to the ingress link receiving the first data packet indicates the second BAP topology. If yes, go to step 903; if not, go to step 904.
  • the first host node may configure the mapping relationship between the link ID of the ingress link and the topology ID for the first IAB node in advance. Specifically, the first donor node may send an RRC message to the MT side of the first IAB node, and use the new information element CellGroupConfig in the message to carry the mapping relationship. Alternatively, the first host node may also send an F1AP message to the DU side of the first IAB node, where the F1AP message may carry the mapping relationship.
  • step 902 may be replaced by: judging whether the BAP route ID in the header of the first data packet matches the routing table of the first BAP topology. If yes, go to step 904; if not, go to step 903.
  • step 902 may be replaced by: judging whether the BAP address in the header of the first data packet belongs to the first BAP address set. If yes, go to step 903; if not, go to step 904.
  • the second host node can configure the first BAP address set for the first IAB node in advance through the first host node, for example, the first BAP address set can be or must include the second host node for the first IAB node A set of pseudo BAP addresses allocated by its descendant nodes. All BAP addresses in the first BAP address set can be configured in advance in the column of the original BAP routing identifier of the rewriting table in step 903 .
  • step 902 may be replaced by: judging whether the BAP path ID in the header of the first data packet belongs to the first BAP path ID set. If yes, go to step 903; if not, go to step 904.
  • the second host node may configure the first BAP path ID set for the first node in advance through the first host node, for example, the first BAP path ID set may be or must include the Indicates a set of special path IDs to the first IAB node and its descendant nodes. All BAP path IDs in the first BAP path ID set can be configured in advance in the column of the original BAP routing identifier in the rewriting table in step 903 .
  • the first IAB node judging whether the first data packet comes from the second BAP topology is replaced by: the first IAB node judging whether the BAP topology corresponding to the ingress link receiving the first data packet is the second BAP topology. If yes, go to step 903; if not, go to step 904.
  • the ingress link through which the first IAB node receives the downlink data packet may include a first ingress link and a second ingress link, the BAP topology corresponding to the first ingress link is the first BAP topology, the The BAP topology corresponding to the second ingress link is the second BAP topology.
  • the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the first BAP topology; if the first IAB node If the first data packet is received through the second ingress link, the BAP topology corresponding to the ingress link where the first IAB node receives the first data packet is the second BAP topology.
  • the first IAB node rewrites the first BAP route identifier of the first data packet into the second BAP route identifier.
  • the first BAP routing ID can be understood as the original BAP routing ID of the first data packet or the current BAP routing ID (BAP routing ID) of the first data packet.
  • the first BAP routing identifier may include a destination BAP address and a path identifier (path ID) of the first data packet.
  • step 903 is as follows: check whether the first BAP routing identifier of the first data packet matches the rewriting table (rewriting table), that is, judge whether the first BAP routing identifier can perform rewriting; The first BAP routing identifier is rewritten as the second BAP routing identifier. If the first BAP routing identifier does not match the rewriting table, the first data packet is delivered to the upper layer of the BAP node of the first IAB node.
  • rewriting table rewriting table
  • the rewriting table can contain one or more sets of BAP routing identifier mapping relationships, and each set of BAP routing identifier mapping relationships is used to convert a BAP routing identifier that is not identifiable to the first IAB node (that is, a BAP routing identifier recognizable by the IAB node in the second BAP topology) BAP routing identifier) is mapped to a BAP routing identifier recognizable by the first IAB node.
  • Checking whether the first BAP routing identifier of the first data packet matches the rewriting table may be: querying whether the rewriting table includes the mapping relationship between the first BAP routing identifier and other BAP routing identifiers.
  • Rewriting the first BAP routing identifier into a second BAP routing identifier based on the rewriting table may be: obtaining a second BAP routing identifier that has a BAP routing identifier mapping relationship with the first BAP routing identifier based on the rewriting table.
  • Table 1 is an example of a rewriting table provided by this application.
  • the first column is the original BAP routing identifier
  • the second column is the rewritten BAP routing identifier.
  • each original BAP route identifier in the first column is a BAP route identifier recognizable by the IAB nodes in the second BAP topology.
  • each original BAP routing identifier in the first column corresponds to a BAP routing identifier from a downlink data packet (eg, the first data packet) belonging to the second BAP topology.
  • the rewritten BAP routing identifier in the second column is a BAP routing identifier recognizable by the first IAB node.
  • the original BAP routing identifier in each row corresponds to the rewritten BAP routing identifier in the row.
  • the first BAP route identifier in the first row corresponds to the second BAP route identifier in the first row.
  • the first BAP routing identifier can query whether the first column of table 1 contains the first BAP routing identifier; if so, the first BAP routing identifier matches the rewriting table; if not, the first BAP routing identifier does not match the rewriting table . In this example, if the first column of Table 1 contains the first BAP routing identifier, the second BAP routing identifier that has a mapping relationship with the first BAP routing identifier is acquired.
  • step 903 is as follows: the first IAB node directly rewrites the first BAP routing identifier based on the rewriting table to obtain the second BAP routing identifier. In this implementation manner, the first BAP routing identifier can be quickly rewritten into the second BAP routing identifier, with fewer operations.
  • the first IAB node may store the BAP address allocated by the first host node for the first IAB node. Judging whether the BAP address of the first data packet matches the BAP address allocated by the first host node for the first IAB node may be: judging whether the BAP address of the first data packet is the same as the BAP address allocated by the first host node for the first IAB node .
  • step 904 may be: judging whether the destination BAP address of the first data packet matches the BAP address assigned by the first host node to the first IAB node.
  • step 904 may be: judge whether the rewritten BAP address of the first data packet matches the BAP address allocated by the first host node for the first IAB node; the above-mentioned rewritten BAP address is the above-mentioned The BAP address contained in the second BAP routing identifier.
  • the first IAB node submits the first data packet to an upper layer of the BAP layer of the first IAB node.
  • the first IAB node forwards the first data packet according to the routing table.
  • step 906 may be: the first IAB node forwards the first data according to the next-hop BAP address in the routing table that matches the first BAP routing identifier Bag. If no next-hop BAP address (entry) matching the first BAP routing identifier is found in the routing table, it is judged that the first data packet is an error packet, and the first data packet is discarded.
  • step 906 may be: the first IAB node forwards the first data packet according to the next-hop BAP address in the routing table that matches the second BAP routing identifier . If no next-hop BAP address (entry) matching the second BAP routing identifier is found in the routing table, it is judged that the first data packet is an error packet, and the first data packet is discarded.
  • the BAP layer of the first IAB node can route the first data packet according to the BAP address of the first data packet; it can also rewrite the BAP routing ID of the first data packet before routing. Based on these two schemes, the priorities of these two schemes can be set. A possible example is as follows: If the first IAB node is configured with rewriting table, the BAP layer of the first IAB node considers that the latter scheme has a higher priority than The former scheme has high priority; otherwise, only rerouting based on BAP address.
  • the first data packet comes from the second BAP topology, it is determined whether to rewrite the BAP routing identifier of the first data packet, so as to forward the data packet from the second BAP topology through the routing table.
  • the BAP address of the first data packet matches the BAP address allocated by the first host node for the first IAB node, it is decided whether to forward the first data packet or hand over the first data packet to the upper layer of the BAP layer, and the first The data packet is routed to the correct transmission path, which ensures the stable transmission of IAB node and UE data.
  • FIG. 10 is a flow chart of another routing method provided by the embodiment of the present application.
  • the method flow in FIG. 10 is a possible implementation of the method flow in FIG. 8 .
  • the method includes:
  • the first IAB node receives a first data packet.
  • the first IAB node determines whether the first data packet is from the second BAP topology.
  • step 1003 If yes, go to step 1003; if not, go to step 1004.
  • step 1004. For the implementation manner of step 1002, reference may be made to step 902.
  • Step 1003 may be: judging whether the destination BAP address of the first data packet is the same as the BAP address allocated by the second host node to the first IAB node. If yes, execute step 1004; if not, execute step 1005.
  • step 1003 may be replaced by: judging whether the destination BAP address of the first data packet belongs to the second BAP address set. If yes, execute step 1005; if not, execute step 1004.
  • the second host node may pre-configure the second BAP address set for the first IAB node through the first host node.
  • the second BAP address set may be a set of pseudo BAP addresses allocated by the second host node to the descendant nodes of the first IAB node, but does not include addresses allocated to the first IAB node.
  • all the BAP addresses in the second BAP address set can be configured in advance in the column of the original BAP routing identifier of the rewriting table in step 1005 .
  • step 1003 may be replaced by: judging whether the destination BAP path ID of the first data packet belongs to the second BAP path ID set. If yes, execute step 1005; if not, execute step 1004.
  • the second host node may pre-configure the second BAP path ID set for the first IAB node through the first host node.
  • the second BAP path ID set may be a set of special path IDs allocated by the second host node to indicate the descendant nodes of the first IAB node, but does not include the path used to indicate the first IAB node ID.
  • all the BAP path IDs in the second BAP path ID set may be configured in advance in the column of the original BAP routing identifier in the rewriting table in step 1005 .
  • the first IAB node delivers the first data packet to an upper layer of the BAP layer of the first IAB node.
  • the first IAB node rewrites the first BAP routing identifier of the first data packet into the second BAP routing identifier.
  • step 1005 please refer to step 903 in FIG. 9 .
  • Step 1006 may be: judging whether the destination BAP address of the first data packet is the same as the BAP address allocated by the first host node to the first IAB node. If yes, execute step 1007; if not, execute step 1008.
  • the first IAB node delivers the first data packet to an upper layer of the BAP layer of the first IAB node.
  • the first IAB node forwards the first data packet according to the routing table.
  • step 1008 please refer to step 906 in FIG. 9 .
  • the first data packet comes from the second BAP topology, it is decided whether to forward the first data packet or send the first
  • the data packet is delivered to the upper layer of the BAP layer; when the first data packet is not from the second BAP topology, it is determined by judging whether the destination BAP address of the first data packet matches the BAP address assigned by the first host node to the first IAB node Whether to forward the first data packet or submit the first data packet to the upper layer of the BAP layer; the first data packet can be routed to the correct transmission path, ensuring the stable transmission of IAB node and UE data.
  • FIG. 11 is a flow chart of another routing method provided by the embodiment of the present application.
  • the method flow in FIG. 11 is a possible implementation of the method flow in FIG. 8 .
  • the method includes:
  • the first IAB node receives a first data packet.
  • the first IAB node determines whether the first data packet is from the second BAP topology.
  • step 1103 If yes, go to step 1103; if not, go to step 1104.
  • step 1102 For the implementation manner of step 1102, reference may be made to step 902 or the steps replacing step 902.
  • Step 1103 may be: judging whether the destination BAP address of the first data packet is the same as the BAP address allocated by the second host node to the first IAB node, and the first indication information indicates delivery to the upper layer. If the destination BAP address of the first data packet is the same as the BAP address assigned by the second host node to the first IAB node and the first indication information indicates to deliver the upper layer, then execute step 1104; otherwise, execute step 1105.
  • the first indication information is included in the first data packet.
  • the first indication information may indicate to deliver the first data packet to the upper layer of the BAP layer of the first IAB node or not to deliver the first data packet to the upper layer of the BAP layer of the first IAB node.
  • the first indication information may be included in the path identifier included in the first data packet.
  • the first indication information may be additional indication information (occupying one or more bits) added to the existing path identifier.
  • the first indication information is two additional bits added to the existing path identifier; if the first indication information is 00, the first indication information indicates not to hand over to the upper layer; if the first indication information is 11, then the first indication information indicates to deliver the upper layer (that is, deliver the first data packet to the upper layer).
  • the first indication information may use one or more special PathID (10 bits in size) values to indicate whether to submit to the upper layer.
  • the upper layer of the BAP layer of the IAB node may refer to the IP layer on the DU side. After the BAP layer on the MT side of the IAB node receives the data packet, it judges that it is a data packet for itself, and then hands it over to the IP layer on its DU side.
  • the first IAB node delivers the first data packet to an upper layer of the BAP layer of the first IAB node.
  • the first IAB node rewrites the first BAP routing identifier of the first data packet into the second BAP routing identifier.
  • step 1105 please refer to step 903 in FIG. 9 .
  • Step 1106 may be: judging whether the destination BAP address of the first data packet is the same as the BAP address allocated by the first host node to the first IAB node. If yes, go to step 1107; if not, go to step 1108.
  • the first IAB node delivers the first data packet to an upper layer of the BAP layer of the first IAB node.
  • the first IAB node forwards the first data packet according to the routing table.
  • step 1108 please refer to step 906 in FIG. 9 .
  • the first data packet by judging whether the first data packet comes from the second BAP topology, it is determined whether to rewrite the BAP routing identifier of the first data packet, so as to forward the data packet from the second BAP topology through the routing table.
  • the first data packet comes from the second BAP topology, it is determined by judging whether the target BAP address of the first data packet matches the BAP address allocated by the second host node for the first IAB node and whether the first indication information indicates the delivery to the upper layer.
  • the BAP address assigned by the IAB node determines whether to forward the first data packet or hand it over to the upper layer of the BAP layer; routing the first data packet to the correct transmission path ensures the stable transmission of IAB node and UE data .
  • FIG. 12 is a flow chart of another routing method provided by the embodiment of the present application.
  • the method in FIG. 12 can be applied to an IAB network, the above-mentioned IAB network includes a first BAP topology and a second BAP topology, the above-mentioned first BAP topology is managed by the first host node, the above-mentioned second BAP topology is managed by the second host node, and the above-mentioned The first host node is different from the above-mentioned second host node.
  • any border node in the IAB network can forward the uplink data packet by using the method flow in FIG. 12 .
  • the border nodes in the IAB network can execute the routing methods in FIG. 8 to FIG. 11 to forward the downlink data packets, and can also execute the routing method in FIG. 12 to forward the uplink data packets. As shown in Figure 12, the method includes:
  • the first IAB node receives a second data packet from a child node of the first IAB node.
  • the first IAB node is managed by the first host node, at least one parent node of the first IAB node is managed by the second host node, and the first IAB node belongs to the first BAP topology.
  • the first IAB node is a border node in the IAB network.
  • the first IAB node forwards the second data packet according to the fourth BAP routing identifier and the routing table when obtaining a fourth BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet.
  • the first IAB node obtains the fourth BAP route identifier that has a mapping relationship with the third BAP route identifier of the second data packet by searching the rewriting table. For example, the first IAB node searches the rewriting table for the BAP routing identifier that has a mapping relationship with the third BAP routing identifier, and obtains the fourth BAP routing identifier. Forwarding the second data packet according to the fourth BAP routing identifier and the routing table may be: forwarding the second data packet by the first IAB node according to the next-hop BAP address in the routing table that matches the fourth BAP routing identifier.
  • Step 1202 may be replaced by: if the first IAB node does not obtain the BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, forward the above-mentioned first BAP routing identifier according to the third BAP routing identifier and the routing table. Two packets.
  • the first IAB node obtains the BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet by looking up the rewriting table; if the rewriting table does not contain the BAP routing identifier that has a mapping relationship with the third BAP routing identifier The BAP routing identifier forwards the second data packet according to the third BAP routing identifier and the routing table.
  • forwarding the above-mentioned second data packet may be: the first IAB node forwards the above-mentioned second data packet according to the next-hop BAP address in the above-mentioned routing table that matches the above-mentioned third BAP routing identifier Bag.
  • the second data packet in the case of obtaining the fourth BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet, can be forwarded according to the fourth BAP routing identifier and the routing table; The second data packet is routed to the correct transmission path.
  • FIG. 13 is a flow chart of another routing method provided by the embodiment of the present application.
  • the method flow in FIG. 13 is a possible implementation of the method flow in FIG. 12 .
  • the method includes:
  • the first IAB node receives a second data packet from a child node of the first IAB node.
  • Judging whether the third BAP routing identifier of the second data packet matches the rewriting table may be: judging whether the rewriting table contains a BAP routing identifier that has a mapping relationship with the third BAP routing identifier of the second data packet. If yes, go to step 1303; if not, go to step 1304.
  • the first BAP routing identifier includes the destination BAP address and the routing identifier of the second data packet.
  • step 1302 may be replaced by: judging whether the third BAP routing identifier of the second data packet matches the routing table of the first BAP topology. If yes, execute step 1304; if not, execute step 1303.
  • step 1302 may be replaced by: judging whether the third BAP address of the second data packet belongs to the third BAP address set. If yes, go to step 1303; if not, go to step 1304.
  • the first host node may configure the third BAP address set for the first IAB node in advance.
  • the third BAP address set may be or must include the BAP address allocated by the first host node to the first IAB node or the pseudo BAP address allocated by the first host node to the second host node.
  • all the BAP addresses in the third BAP address set can be configured in advance in the column of the original BAP routing identifier of the rewriting table in step 1303 .
  • step 1302 may be replaced by: judging whether the third BAP path ID of the second data packet belongs to the third BAP path ID set. If yes, go to step 1303; if not, go to step 1304.
  • the first host node may configure the third BAP path ID set for the first IAB node in advance.
  • the third BAP path ID set may be or must include a BAP path ID allocated by the first host node for indicating to the second host node.
  • all path IDs in the third BAP path ID set may be configured in advance in the column of the original BAP routing identifier in the rewriting table in step 1303 .
  • the first IAB node rewrites the third BAP route identifier of the second data packet into the fourth BAP route identifier.
  • step 1303 For the implementation manner of step 1303, please refer to step 903.
  • the first IAB node forwards the second data packet according to the routing table.
  • step 1304 may be: the first IAB node forwards the second data packet according to the next-hop BAP address in the routing table that matches the fourth BAP routing identifier. If the next hop BAP address (entry) matching the fourth BAP routing identifier cannot be found in the routing table, it is judged that the second data packet is an error packet, and the second data packet is discarded.
  • step 1304 may be: the first IAB node forwards the second data packet according to the next-hop BAP address in the routing table that matches the third BAP routing identifier. If no next-hop BAP address (entry) matching the third BAP routing identifier is found in the routing table, it is judged that the second data packet is an error packet, and the second data packet is discarded.
  • the second data packet can be routed to the correct transmission path.
  • FIG. 14 shows a schematic structural diagram of a communication device 1400 .
  • the communication device 1400 can correspondingly implement the functions or steps implemented by the IAB node (for example, the first IAB node) in each of the above method embodiments.
  • the communication device may include a processing module 1410 and a transceiver module 1420 .
  • a storage unit may also be included, and the storage unit may be used to store instructions (code or program) and/or data.
  • the processing module 1410 and the transceiver module 1420 may be coupled with the storage unit, for example, the processing module 1410 may read instructions (code or program) and/or data in the storage unit to implement a corresponding method.
  • Each of the above units can be set independently, or can be partially or fully integrated.
  • the transceiving module 1420 may include a sending module and a receiving module.
  • the communication device 1400 can correspondingly implement the behavior and function of the first IAB node in the foregoing method embodiments.
  • the communication device 1400 may be a first IAB node, or may be a component (such as a chip or a circuit) applied to the first IAB node.
  • the transceiver module 1420 may be used to perform all the receiving or sending operations performed by the first IAB node in the embodiment shown in FIG. 8 , FIG. 9 , FIG. 10 , FIG. 11 , FIG. 12 or FIG. 13 , such as the embodiment shown in FIG. Step 901 in FIG. 9 and Step 901 and Step 906 in the embodiment shown in FIG. 9 , and/or other processes for supporting the technology described herein.
  • the processing module 1410 is configured to execute all operations performed by the first IAB node in the embodiment shown in FIG. 8 , FIG. 9 , FIG. 10 , FIG. 11 , FIG. 12 or FIG. 13 except for the transceiving operation.
  • the transceiving module 1420 may be used to perform step 802 in the embodiment shown in FIG. 8 , and/or to support other processes of the techniques described herein.
  • the transceiver module 1420 may be used to execute step 902, step 903, step 904, and step 905 in the embodiment shown in FIG. 9 .
  • the transceiver module 1420 may be used to execute steps 1002 to 1007 in the embodiment shown in FIG. 10 .
  • the transceiver module 1420 may be used to execute steps 1102 to 1107 in the embodiment shown in FIG. 11 .
  • the transceiver module 1420 may be used to execute step 1201 and step 1202 in the embodiment shown in FIG. 12 .
  • the transceiver module 1420 may be used to execute step 1301 and step 1304 in the embodiment shown in FIG. 13 .
  • the communication device 1400 can correspondingly implement the behavior and function of the first host node in the foregoing method embodiments.
  • the communication device 1400 may be the first host node, or may be a component (such as a chip or a circuit) applied to the first host node.
  • the transceiver module 1420 may be used to perform all the receiving or sending operations performed by the first host node in the foregoing embodiments, and the processing module 1410 may be used to perform all the receiving and transmitting operations performed by the first host node in the foregoing embodiments. All operations. For related specific descriptions, reference may be made to the method embodiments.
  • FIG. 15 is a schematic structural diagram of a communication device 1500 provided by an embodiment of the present application.
  • the communication device 1500 may be the first IAB node, and can realize the function of the first IAB node in the method provided by the embodiment of the present application.
  • the communication device 1500 may also be a device capable of supporting the first IAB node to implement a corresponding function in the method provided by the embodiment of the present application.
  • the communication device 1500 may be a system on a chip.
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • the above-mentioned transceiver module 1420 may be a transceiver, and the transceiver is integrated in the communication device 1500 to form the communication interface 1510 .
  • the communication device 1500 includes at least one processor 1520, configured to implement or support the communication device 1500 to implement the function of the first IAB node in the method provided in the embodiment of the present application. For details, refer to the detailed description in the method example, and details are not repeated here.
  • the communication device 1500 may also include at least one memory 1530 for storing program instructions and/or data.
  • the memory 1530 is coupled to the processor 1520 .
  • the coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • Processor 1520 may cooperate with memory 1530 .
  • the processor 1520 may execute program instructions and/or data stored in the memory 1530, so that the communication device 1500 implements a corresponding method. At least one of the at least one memory may be included in the processor.
  • the communication device 1500 may also include a communication interface 1510 for communicating with other devices through a transmission medium, so that devices used in the communication device 1500 can communicate with other devices. Exemplarily, when the communication device is the first IAB node, the other device is other IAB nodes.
  • the processor 1520 can utilize the communication interface 1510 to send and receive data.
  • the communication interface 1510 may specifically be a transceiver.
  • a specific connection medium among the communication interface 1510, the processor 1520, and the memory 1530 is not limited.
  • the memory 1530, the processor 1520, and the communication interface 1510 are connected through the bus 1540.
  • the bus is represented by a thick line in FIG. 15, and the connection between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 15 , but it does not mean that there is only one bus or one type of bus.
  • the processor 1520 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may implement Or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.
  • the memory 1530 may be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and may also be a volatile memory (volatile memory), For example random-access memory (random-access memory, RAM).
  • a memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • the memory in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, and is used for storing program instructions and/or data.
  • FIG. 16 shows another form of the communication device 1500 .
  • the communication device 1500 is the first IAB node.
  • the first IAB node includes CU and DU
  • the CU may include a communication interface, a processor, and a memory, and a bus connecting the communication interface, processor, and memory, wherein the communication The interface can be used to communicate with the CU of the IAB host node or the DU of the IAB node.
  • the DU may also include a communication interface, a processor, and a memory, and a bus connecting the communication interface, the processor, and the memory, wherein the communication interface is used to communicate with the MT of the IAB node.
  • FIG. 17 is a schematic structural diagram of another communication device 170 provided by an embodiment of the present application.
  • the communication device shown in FIG. 17 includes a logic circuit 1701 and an interface 1702 .
  • the processing module in FIG. 14 can be realized by a logic circuit 1701
  • the transceiver module in FIG. 14 can be realized by an interface 1702 .
  • the logic circuit 1701 may be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc.
  • the interface 1702 may be a communication interface, an input-output interface, or the like.
  • the logic circuit and the interface may also be coupled to each other. The embodiment of the present application does not limit the specific connection manner of the logic circuit and the interface.
  • the logic circuit and the interface may be used to perform the functions or operations performed by the above-mentioned first IAB node.
  • the embodiment of the present application also provides a communication system.
  • the communication system includes a first host node, a second host node, a first IAB node, one or more IAB nodes controlled by the first host node, and a second host node.
  • Embodiments of the present application also provide a computer-readable storage medium, including instructions, which, when run on a computer, cause the computer to execute the methods of the foregoing embodiments.
  • Embodiments of the present application further provide a computer program product, including instructions, which, when run on a computer, cause the computer to execute the methods of the foregoing embodiments.
  • An embodiment of the present application provides a system-on-a-chip, where the system-on-a-chip includes a processor and may also include a memory, configured to implement the function of the first IAB node in the foregoing method.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

Landscapes

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

Abstract

本申请实施例公开了一种路由方法和通信装置，应用于IAB网络，该IAB网络包括第一BAP拓扑和第二BAP拓扑，该第一BAP拓扑由第一宿主节点管理，该第二BAP拓扑由第二宿主节点管理，该第一宿主节点与该第二宿主节点不同；该路由方法包括：第一IAB节点接收第一数据包；该第一IAB节点由该第一宿主节点管理，该第一IAB节点的至少一个父节点由该第二宿主节点管理，该第一IAB节点属于该第一BAP拓扑；该第一IAB节点根据接收第一数据包的入口链路所对应的BAP拓扑以及第一IAB节点所属的BAP拓扑，处理第一数据包；能够将该第一数据包路由至正确的传输路径。

Description

路由方法和通信装置
本申请要求于2021年08月04日提交中国专利局、申请号为202110891824.2、申请名称为“路由方法和通信装置”的中国专利申请的优先权，以及要求于2021年09月18日提交中国专利局、申请号为202111101156.5、申请名称为“路由方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种路由方法和通信装置。
背景技术
相较于第四代移动通信系统，第五代移动通信(5th generation，5G)以及未来移动通信系统针对网络的各项性能指标，提出了更严苛的要求。例如，5G相较于4G，容量提升1000倍，更广的覆盖需求、超高可靠超低时延等。一方面，考虑到高频载波频率资源丰富，在热点区域，为满足5G超高容量需求，利用高频小站组网愈发流行。由于高频载波传播特性较差，受遮挡衰减严重，覆盖范围不广，故而需要大量密集部署小站。然而，为这些大量密集部署的小站提供光纤回传的代价很高，施工难度大，因此需要经济便捷的回传方案。另一方面，从广覆盖需求的角度出发，在一些偏远地区提供网络覆盖，光纤的部署难度大，成本高，也需要设计灵活便利的接入和回传方案。接入回传一体化(integrated access and backhaul，IAB)技术为解决上述两个问题提供了思路：其接入链路(access link)和回传链路(backhaul link，BL)皆采用无线传输方案，减少了光纤部署。
在IAB网络中，中继节点RN(relay node)或者叫IAB节点(IAB node)，可以为用户设备(UE，user equipment)提供无线接入服务以及业务数据的转发。UE的业务数据由IAB节点通过无线回传链路传输到IAB宿主(IAB donor)，IAB donor也可称为宿主节点(donor node)或宿主基站(donor gNodeB，DgNB)。IAB节点由移动终端(mobile termination，MT)部分和分布式单元(distributed unit，DU)部分组成。其中，当IAB节点面向其父节点时，可以作为终端设备，即MT的角色；当IAB面向其子节点(子节点可能是另一IAB节点，或者UE)时，其被视为网络设备，即作为DU的角色。宿主基站(DgNB)可以是一个具有完整基站功能的接入网网元，还可以是集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)分离形态的接入网网元。宿主基站连接到为UE服务的核心网(例如连接到5G核心网)网元，并为IAB节点提供无线回传功能。
在IAB网络中，每个IAB边界节点(boundary node)，需要将经过它的数据包路由至正确的路径。因此，如何使得IAB边界节点将经过它的数据包路由至正确的路径是需要解决的问题。
发明内容
本申请实施例公开了一种路由方法和通信装置，能够使得IAB边界节点将经过它的数据包路由至正确的路径。
第一方面，本申请实施例提供了一种路由方法，该方法应用于接入回传一体化IAB网络，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理， 所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；该方法可由第一通信装置执行，第一通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。下面以所述第一通信装置为第一IAB节点为例进行描述。该方法包括：
第一IAB节点接收第一数据包；所述第一IAB节点由所述第一宿主节点管理，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑；所述第一IAB节点根据接收所述第一数据包的入口链路所对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包。
第一IAB节点对于接收到的第一数据包(下行数据包)可判断是否rewriting该第一数据包的BAP routing ID。应理解，第一IAB节点在能够准确地判断是否rewriting接收的第一数据包的BAP routing ID时，保证将该第一数据包路由至正确的路径。
本申请实施例中，第一IAB节点根据接收第一数据包的入口链路所对应的BAP拓扑以及该第一IAB节点所属的BAP拓扑，能够准确地判断是否rewriting接收的第一数据包的BAP routing ID，进而将该第一数据包路由至正确的路径。
在一种可能的实现方式中，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑不为所述第一BAP拓扑且未满足第一条件的情况下，所述第一IAB节点根据第二BAP路由标识和路由表转发所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第二BAP路由标识由改写所述第一数据包的第一BAP路由标识得到，所述第一BAP路由标识包含所述第一数据包的目的BAP地址和路径标识；所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
当第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑且该第一IAB节点属于第一BAP拓扑时，该第一IAB节点不可识别第一BAP节点的BAP路由标识。若第一IAB节点要转发该第一数据包，可将第一数据包的BAP路由标识改成为其可识别的BAP路由标识。第一条件可理解为在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑时，第一IAB节点判断是否转发第一数据包的条件。在未满足第一条件时，第一IAB节点转发第一数据包。应理解，在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑且未满足第一条件的情况下，第一IAB节点转发第一数据包，并且改写第一数据包的BAP路由标识。
在该实现方式中，在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑且未满足第一条件的情况下，第一IAB节点根据第二BAP路由标识和路由表转发第一数据包；能够将第一数据包路由至正确的路径。
在一种可能的实现方式中，所述第一条件还包括：所述第一数据包包含的第一指示信息指示将所述第一数据包递交给所述第一IAB节点的BAP层的上层。
在该实现方式中，第一条件还包括：第一数据包包含的第一指示信息指示将第一数据包递交给第一IAB节点的BAP层的上层。在该实现方式中，只有满足第一指示信息指示将第一数据包递交给第一IAB节点的BAP层的上层的条件，才将第一数据包递交BAP层的上层，能够避免错误的将第一数据包递交给第一IAB节点的BAP层的上层。
在一种可能的实现方式中，所述第一IAB节点根据路由表转发所述第一数据包之前，所述方法还包括：所述第一IAB节点将所述第一数据包的所述第一BAP路由标识改写为所述第二BAP路由标识；所述第一IAB节点根据路由表转发所述第一数据包包括：所述第一IAB节点根据所述路由表中与所述第二BAP路由标识相匹配的下一跳BAP地址，转发所述第一数据包。
在该实现方式中，第一IAB节点根据路由表中与第二BAP路由标识相匹配的下一跳BAP地址，转发第一数据包。由于第二BAP路由标识为第一IAB节点的下游节点可识别的BAP路由标识，因此第一IAB节点根据路由表中与第二BAP路由标识相匹配的下一跳BAP地址转发第一数据包；能够将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑不为所述第一BAP拓扑且满足第一条件的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
当第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑时，第一数据包的BAP地址是第二宿主节点分配的。因此，第一IAB节点通过判断是否满足第一条件，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑为所述第一BAP拓扑且第三BAP地址与第四BAP地址不匹配的情况下，所述第一IAB节点根据路由表转发所述第一数据包；所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
当第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑时，第一数据包的BAP地址是第一宿主节点分配的。第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑为所述第一BAP拓扑且第三BAP地址与第四BAP地址相匹配的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
当第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑时，第一数据包的BAP地址是第一宿主节点分配的。第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
第二方面，本申请实施例提供另一种路由方法，该路由方法应用于IAB网络，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；该方法可由第二通信装置执行，第二通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。下面以所述第二通信装置为第一IAB节点为例进行描述。该方法包括：所述第一IAB节点接收来自所述第一IAB节点的子节点的第二数据包；所述第一IAB节点由所述第一宿主节点管理，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑；所述第一IAB节点在获得与所述第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识的情况下，根据所述第四BAP路由标识以及路由表，转发所述第二数据包。
当第一IAB节点获得与第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识时，表明第二数据包的第三BAP路由标识需要被改写。也就是说，第一IAB节点使用第三BAP路由标识不能转发第二数据包。这时根据第四BAP路由标识以及路由表，转发所述第二数据包；能够将第二数据包路由至正确的传输路径。
本申请实施例中，在获得与第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识的情况下，根据第四BAP路由标识以及路由表，转发第二数据包；能够将第二数据包路由至正确的传输路径。
在一种可能的实现方式中，所述方法还包括：所述第一IAB节点在未获得与所述第二数据包的第三BAP路由标识存在映射关系的BAP路由标识的情况下，根据所述第三BAP路由标识以及路由表，转发所述第二数据包。
当第一IAB节点未获得与第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识时，表明第二数据包的第三BAP路由标识不需要被改写。也就是说，第一IAB节点未获得与第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识时，第一IAB节点根据第三BAP路由标识能够正确的转发第二数据包。
在该实现方式中，第一IAB节点在未获得与第二数据包的第三BAP路由标识存在映射关系的BAP路由标识的情况下，根据第三BAP路由标识以及路由表，转发第二数据包；能够将第二数据包路由至正确的传输路径。
第三方面，本申请实施例提供另一种路由方法，该方法应用于IAB网络，该IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；该方法可由第三通信装置执行，第三通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。下面以所述第三通信装置为第一IAB节点为例进行描述。该方法包括：
第一IAB节点接收第一数据包；所述第一IAB节点根据所述第一数据包中的第二指示信息以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包；所述第二指示信息指示所述第一数据包的目的BAP地址由所述第一宿主节点分配，或者，所述第二指示信息指示所述第一数据包的目的BAP地址由所述第二宿主节点分配。
本申请实施例中，第一IAB节点根据第一数据包中的第二指示信息以及该第一IAB节点所属的BAP拓扑，能够准确地判断是否rewriting接收的第一数据包的BAP routing ID，进而将该第一数据包路由至正确的路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第二指示信息以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第二指示信息指示 所述第一数据包的目的BAP地址由所述第二宿主节点分配且未满足第一条件的情况下，所述第一IAB节点根据第二BAP路由标识和路由表转发所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第二BAP路由标识由改写所述第一数据包的第一BAP路由标识得到，所述第一BAP路由标识包含所述第一数据包的目的BAP地址和路径标识；所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
当第一数据包的目的BAP地址由第二宿主节点分配且该第一IAB节点属于第一BAP拓扑时，该第一IAB节点不可识别第一BAP节点的BAP路由标识。若第一IAB节点要转发该第一数据包，将第一数据包的BAP路由标识改成为其可识别的BAP路由标识。第一条件可理解为在第一数据包的目的BAP地址由第二宿主节点分配时，第一IAB节点判断是否转发第一数据包的条件。在未满足第一条件时，第一IAB节点转发第一数据包。应理解，在第一数据包的目的BAP地址由第二宿主节点分配且未满足第一条件的情况下，第一IAB节点转发第一数据包，并且改写第一数据包的BAP路由标识。
在该实现方式中，在第一数据包的目的BAP地址由第二宿主节点分配且未满足第一条件的情况下，第一IAB节点根据第二BAP路由标识和路由表转发第一数据包；能够将第一数据包路由至正确的路径。
在一种可能的实现方式中，所述第一条件还包括：所述第一数据包包含的第一指示信息指示将所述第一数据包递交给所述第一IAB节点的BAP层的上层。
在该实现方式中，第一条件还包括：第一数据包包含的第一指示信息指示将第一数据包递交给第一IAB节点的BAP层的上层。在该实现方式中，当满足第一指示信息指示将第一数据包递交给第一IAB节点的BAP层的上层的条件时，将第一数据包递交BAP层的上层，能够避免错误的将第一数据包递交给第一IAB节点的BAP层的上层。
在一种可能的实现方式中，所述第一IAB节点根据路由表转发所述第一数据包之前，所述方法还包括：所述第一IAB节点将所述第一数据包的所述第一BAP路由标识改写为所述第二BAP路由标识；所述第一IAB节点根据路由表转发所述第一数据包包括：所述第一IAB节点根据所述路由表中与所述第二BAP路由标识相匹配的下一跳BAP地址，转发所述第一数据包。
在该实现方式中，第一IAB节点根据路由表中与第二BAP路由标识相匹配的下一跳BAP地址，转发第一数据包。由于第二BAP路由标识为第一IAB节点的下游节点可识别的BAP路由标识，因此第一IAB节点根据路由表中与第二BAP路由标识相匹配的下一跳BAP地址转发第一数据包；能够将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第二指示信息以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第二指示信息指示所述第一数据包的目的BAP地址由所述第二宿主节点分配且满足第一条件的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
当第二指示信息指示第一数据包的目的BAP地址由第二宿主节点分配时，第一IAB节点通过判断是否满足第一条件，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第二指示信息以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第二指示信息指示所述第一数据包的目的BAP地址由所述第一宿主节点分配且第三BAP地址与第四BAP地址不匹配的情况下，所述第一IAB节点根据路由表转发所述第一数据包；所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
当第二指示信息指示第一数据包的目的BAP地址由第一宿主节点分配时，第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第二指示信息以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：在所述第二指示信息指示所述第一数据包的目的BAP地址由所述第一宿主节点分配且第三BAP地址与第四BAP地址相匹配的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
当第二指示信息指示第一数据包的目的BAP地址由第一宿主节点分配时，第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
第四方面，本申请实施例提供另一种路由方法，该方法应用于IAB网络，该IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；该方法可由第四通信装置执行，第四通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。下面以所述第四通信装置为第一IAB节点为例进行描述。该方法包括：
第一IAB节点接收第一数据包；所述第一IAB节点根据所述第一数据包中的第三指示信息，处理所述第一数据包；所述第三指示信息指示改写所述第一数据包的BAP地址，或者，所述第三指示信息指示不改写所述第一数据包的BAP地址。
本申请实施例中，第一IAB节点根据第一数据包中的第三指示信息，能够准确地判断是否rewriting接收的第一数据包的BAP routing ID，进而将该第一数据包路由至正确的路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第三指示信息，处理所述第一数据包包括：在所述第三指示信息指示改写所述第一数据包的BAP地址且未满足第一条件的情况下，所述第一IAB节点根据第二BAP路由标识和路由表转发所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第二BAP路由标识由改写所述第一数据包的第一BAP路由标识得到，所述第一BAP路由标识包含所述第一数据包的目的BAP地址和路径标识；所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
在第三指示信息指示改写第一数据包的BAP地址且未满足第一条件的情况下，第一IAB 节点转发第一数据包，并且改写第一数据包的BAP路由标识。
在该实现方式中，在第三指示信息指示改写第一数据包的BAP地址且未满足第一条件的情况下，第一IAB节点根据第二BAP路由标识和路由表转发第一数据包；能够将第一数据包路由至正确的路径。
在一种可能的实现方式中，所述第一条件还包括：所述第一数据包包含的第一指示信息指示将所述第一数据包递交给所述第一IAB节点的BAP层的上层。
在该实现方式中，第一条件还包括：第一数据包包含的第一指示信息指示将第一数据包递交给第一IAB节点的BAP层的上层。在该实现方式中，当满足第一指示信息指示将第一数据包递交给第一IAB节点的BAP层的上层的条件时，将第一数据包递交BAP层的上层，能够避免错误的将第一数据包递交给第一IAB节点的BAP层的上层。
在一种可能的实现方式中，所述第一IAB节点根据路由表转发所述第一数据包之前，所述方法还包括：所述第一IAB节点将所述第一数据包的所述第一BAP路由标识改写为所述第二BAP路由标识；所述第一IAB节点根据路由表转发所述第一数据包包括：所述第一IAB节点根据所述路由表中与所述第二BAP路由标识相匹配的下一跳BAP地址，转发所述第一数据包。
在该实现方式中，第一IAB节点根据路由表中与第二BAP路由标识相匹配的下一跳BAP地址，转发第一数据包。由于第二BAP路由标识为第一IAB节点的下游节点可识别的BAP路由标识，因此第一IAB节点根据路由表中与第二BAP路由标识相匹配的下一跳BAP地址转发第一数据包；能够将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第三指示信息，处理所述第一数据包包括：在所述第三指示信息指示改写所述第一数据包的BAP地址且满足第一条件的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
当第三指示信息指示改写第一数据包的BAP地址时，第一IAB节点通过判断是否满足第一条件，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第三指示信息，处理所述第一数据包包括：在所述第三指示信息指示不改写所述第一数据包的BAP地址且第三BAP地址与第四BAP地址不匹配的情况下，所述第一IAB节点根据路由表转发所述第一数据包；所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
当第三指示信息指示不改写第一数据包的BAP地址时，第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
在一种可能的实现方式中，所述第一IAB节点根据所述第一数据包中的第三指示信息，处理所述第一数据包包括：在所述第三指示信息指示不改写所述第一数据包的BAP地址且第三BAP地址与第四BAP地址相匹配的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第三BAP地址为所述第一数据包的目的BAP地址，所述 第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
当第三指示信息指示不改写第一数据包的BAP地址时，第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包，进而将第一数据包路由至正确的传输路径。
第五方面，本申请实施例提供一种通信方法，该方法应用于IAB网络，该IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；该方法可由第五通信装置执行，第五通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。下面以所述第五通信装置为第一宿主节点为例进行描述。该方法包括：所述第一宿主节点发送第一数据包；所述第一数据包包含第二指示信息，所述第二指示信息指示所述第一数据包的目的BAP地址由所述第一宿主节点分配。可选的，所述第一宿主节点发送第一数据包之前，根据待发送数据生成所述第一数据包。
本申请实施例中，第一宿主节点发送包含第二指示信息的第一数据包，以便IAB网络中的边界节点根据该第二指示信息准确地判断是否改写第一数据包的BAP路由标识。
在一个可能的实现方式中，所述第一宿主节点发送第一数据包包括：向所述第二BAP拓扑中的IAB节点发送所述第一数据包。
在一些实施例中，第一宿主节点在通过其管理的BAP拓扑下发数据包时，该数据包中可不包含指示该数据包的目的BAP地址由第一宿主节点分配的指示信息，这样可以减少资源开销，不需要对已有的数据包的格式做修改。
在该实现方式中，第一宿主节点向第二BAP拓扑中的IAB节点发送包含第二指示信息的第一数据包，以便IAB网络中的边界节点根据该第二指示信息准确地判断需要改写第一数据包的BAP路由标识。
在一个可能的实现方式中，所述第一宿主节点发送第一数据包包括：向所述第一BAP拓扑中的IAB节点发送所述第一数据包。
在该实现方式中，第一宿主节点向第一BAP拓扑中的IAB节点发送包含第二指示信息的第一数据包，以便IAB网络中的边界节点根据该第二指示信息准确地判断不需要改写第一数据包的BAP路由标识。
第六方面，本申请实施例提供一种通信方法，该方法应用于IAB网络，该IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；该方法可由第六通信装置执行，第六通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。下面以所述第六通信装置为第一宿主节点为例进行描述。该方法包括：所述第一宿主节点发送第一数据包；所述第一数据包包含第三指示信息，所述第三指示信息指示改写所述第一数据包的BAP地址，或者，所述第三指示信息指示不改写所述第一数据包的BAP地址。可选的，所述第一宿主节点发送第一数据包之前，根据待发送数据生成所述第一数据包。
本申请实施例中，第一宿主节点发送包含第三指示信息的第一数据包，以便IAB网络中的边界节点根据该第三指示信息准确地判断是否改写第一数据包的BAP路由标识。
在一个可能的实现方式中，所述第一宿主节点发送第一数据包包括：向所述第二BAP拓扑中的IAB节点发送所述第一数据包，所述第三指示信息指示改写所述第一数据包的BAP地址。
在该实现方式中，向第二BAP拓扑中的IAB节点发送包含第三指示信息的第一数据包，IAB网络中的边界节点根据该第三指示信息可准确、快速地确定不需要改写第一数据包的BAP路由标识，进而将第一数据包路由至正确的传输路径。
在一个可能的实现方式中，所述第一宿主节点发送第一数据包包括：向所述第一BAP拓扑中的IAB节点发送所述第一数据包，所述第三指示信息指示不改写所述第一数据包的BAP地址。
在该实现方式中，向第一BAP拓扑中的IAB节点发送包含第三指示信息的第一数据包，IAB网络中的边界节点根据该第三指示信息可准确、快速地确定需要改写第一数据包的BAP路由标识，进而将第一数据包路由至正确的传输路径。
第七方面，本申请实施例提供了一种通信装置，该通信装置具有实现上述第一方面方法实施例中的行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述通信装置可以为IAB网络中的第一IAB节点(边界节点)，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑。在一种可能的实现方式中，包括收发模块和处理模块，其中：
所述收发模块，用于接收第一数据包；
所述处理模块，用于根据接收所述第一数据包的入口链路所对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包。
关于第七方面或第七方面的各种可能的实施方式所带来的技术效果，可参考对于第一方面或第一方面的各种可能的实施方式的技术效果的介绍。
第八方面，本申请实施例提供了一种通信装置，该通信装置具有实现上述第二方面方法实施例中的行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述通信装置可以为IAB网络中的第一IAB节点，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同，所述第一IAB节点由所述第一宿主节点管理，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑。在一种可能的实现方式中，包括收发模块和处理模块，其中：
所述收发模块，用于接收来自所述第一IAB节点的子节点的第二数据包；
所述处理模块，用于在获得与所述第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识的情况下，根据所述第四BAP路由标识以及路由表，控制所述收发模块转发所述第二数据包。
关于第八方面或第八方面的各种可能的实施方式所带来的技术效果，可参考对于第二方面或第二方面的各种可能的实施方式的技术效果的介绍。
第九方面，本申请实施例提供了一种通信装置，该通信装置具有实现上述第三方面方法实施例中的行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述通信装置可以为IAB网络中的第一IAB节点，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿 主节点不同，所述第一IAB节点由所述第一宿主节点管理，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑。在一种可能的实现方式中，包括收发模块和处理模块，其中：
所述收发模块，用于接收第一数据包；
所述处理模块，用于根据所述第一数据包中的第二指示信息以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包；所述第二指示信息指示所述第一数据包的目的BAP地址由所述第一宿主节点分配，或者，所述第二指示信息指示所述第一数据包的目的BAP地址由所述第二宿主节点分配。
关于第九方面或第九方面的各种可能的实施方式所带来的技术效果，可参考对于第三方面或第三方面的各种可能的实施方式的技术效果的介绍。
第十方面，本申请实施例提供了一种通信装置，该通信装置具有实现上述第四方面方法实施例中的行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述通信装置可以为IAB网络中的第一IAB节点，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同，所述第一IAB节点由所述第一宿主节点管理，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑。在一种可能的实现方式中，包括收发模块和处理模块，其中：
所述收发模块，用于接收第一数据包；
所述处理模块，用于根据所述第一数据包中的第三指示信息，处理所述第一数据包；所述第三指示信息指示改写所述第一数据包的BAP地址，或者，所述第三指示信息指示不改写所述第一数据包的BAP地址。
关于第十方面或第十方面的各种可能的实施方式所带来的技术效果，可参考对于第四方面或第四方面的各种可能的实施方式的技术效果的介绍。
第十一方面，本申请实施例提供了一种通信装置，该通信装置具有实现上述第五方面方法实施例中的行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述通信装置可以为IAB网络中的第一宿主节点，该IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同。在一种可能的实现方式中，包括收发模块和处理模块，其中：
所述处理模块，用于控制所述收发模块发送第一数据包；所述第一数据包包含第二指示信息，所述第二指示信息指示所述第一数据包的目的BAP地址由所述第一宿主节点分配。
在一种可能的实现方式中，所述处理模块，具体用于控制所述收发模块向所述第二BAP拓扑中的IAB节点发送所述第一数据包。
关于第十一方面或第十一方面的各种可能的实施方式所带来的技术效果，可参考对于第五方面或第五方面的各种可能的实施方式的技术效果的介绍。
第十二方面，本申请实施例提供了一种通信装置，该通信装置具有实现上述第六方面方法实施例中的行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述通信装置可以为IAB网络中的第一宿主节点，该IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二 宿主节点不同。在一种可能的实现方式中，包括收发模块和处理模块，其中：
所述处理模块，用于控制所述收发模块发送第一数据包；所述第一数据包包含第三指示信息，所述第三指示信息指示改写所述第一数据包的BAP地址，或者，所述第三指示信息指示不改写所述第一数据包的BAP地址。
在一种可能的实现方式中，所述处理模块，具体用于控制所述收发模块向所述第二BAP拓扑中的IAB节点发送所述第一数据包，所述第三指示信息指示改写所述第一数据包的BAP地址。
在一种可能的实现方式中，所述处理模块，具体用于控制所述收发模块向所述第一BAP拓扑中的IAB节点发送所述第一数据包，所述第三指示信息指示不改写所述第一数据包的BAP地址。
关于第十二方面或第十二方面的各种可能的实施方式所带来的技术效果，可参考对于第六方面或第六方面的各种可能的实施方式的技术效果的介绍。
第十三方面，本申请提供一种通信装置，该通信装置包括处理器，该处理器可以用于执行存储器所存储的计算机执行指令，以使上述第一方面或第一方面的任意可能的实现方式所示的方法被执行，或者以使上述第二方面或第二方面的任意可能的实现方式所示的方法被执行，或者以使上述第三方面或第三方面的任意可能的实现方式所示的方法被执行，或者以使上述第四方面或第四方面的任意可能的实现方式所示的方法被执行，或者以使上述第五方面或第五方面的任意可能的实现方式所示的方法被执行，或者以使上述第六方面或第六方面的任意可能的实现方式所示的方法被执行。
本申请实施例中，在执行上述方法的过程中，上述方法中有关发送信息的过程，可以理解为基于处理器的指令进行输出信息的过程。在输出信息时，处理器将信息输出给收发器，以便由收发器进行发射。该信息在由处理器输出之后，还可能进行其他的处理，然后到达收发器。类似的，处理器接收输入的信息时，收发器接收该信息，并将其输入处理器。更进一步的，在收发器收到该信息之后，该信息可能需要进行其他的处理，然后才输入处理器。
对于处理器所涉及的发送和/或接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则可以一般性的理解为基于处理器的指令输出。
在实现过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器等。例如，处理器还可以用于执行存储器中存储的程序，当该程序被执行时，使得该通信装置执行如上述第一方面或第一方面的任意可能的实现方式所示的方法。
在一种可能的实现方式中，存储器位于上述通信装置之外。
在一种可能的实现方式中，存储器位于上述通信装置之内。
本申请实施例中，处理器和存储器还可能集成于一个器件中，即处理器和存储器还可能被集成于一起。
在一种可能的实现方式中，通信装置还包括收发器，该收发器，用于接收报文或发送报文等。
第十四方面，本申请提供一种通信装置，该通信装置包括处理电路和接口电路，该接口电路用于获取数据或输出数据；处理电路用于执行如上述第一方面或第一方面的任意可能的实现方式所示的相应的方法，或者处理电路用于执行如上述第二方面或第二方面的任意可能的实现方式所示的相应的方法，或者处理电路用于执行如上述第三方面或第三方面的任意可能的实现方式所示的相应的方法，或者处理电路用于执行如上述第四方面或第四方面的任意 可能的实现方式所示的相应的方法，或者处理电路用于执行如上述第五方面或第五方面的任意可能的实现方式所示的相应的方法，或者处理电路用于执行如上述第六方面或第六方面的任意可能的实现方式所示的相应的方法。
第十五方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质用于存储计算机程序，当其在计算机上运行时，使得上述第一方面或第一方面的任意可能的实现方式所示的方法被执行，或者使得上述第二方面或第二方面的任意可能的实现方式所示的方法被执行，或者使得上述第三方面或第三方面的任意可能的实现方式所示的方法被执行，或者使得上述第四方面或第四方面的任意可能的实现方式所示的方法被执行，或者使得上述第五方面或第五方面的任意可能的实现方式所示的方法被执行，或者使得上述第六方面或第六方面的任意可能的实现方式所示的方法被执行。
第十六方面，本申请提供一种计算机程序产品，该计算机程序产品包括计算机程序或计算机代码，当其在计算机上运行时，使得上述第一方面或第一方面的任意可能的实现方式所示的方法被执行，或者使得上述第二方面或第二方面的任意可能的实现方式所示的方法被执行，或者使得上述第三方面或第三方面的任意可能的实现方式所示的方法被执行，或者使得上述第四方面或第四方面的任意可能的实现方式所示的方法被执行，或者使得上述第五方面或第五方面的任意可能的实现方式所示的方法被执行，或者使得上述第六方面或第六方面的任意可能的实现方式所示的方法被执行。
第十七方面，本申请提供一种通信系统，通信系统包括第一宿主节点、第二宿主节点、第一IAB节点、由该第一宿主节点控制的一个或多个IAB节点以及由第二宿主节点控制的一个或多个IAB节点；所述第一宿主节点和所述第二宿主节点不同，所述第一IAB节点用于执行上述第一方面至上述第四方面中任意方面的方法。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1为本申请实施例提供的一种IAB系统的结构示意图；
图2为本申请实施例提供的IAB节点的结构示意图；
图3为本申请实施例提供的一种IAB网络的结构示意图；
图4为本申请实施例提供的一种IAB网络中的控制面协议架构的示意图；
图5为本申请实施例提供的一种IAB网络中的用户面协议架构的示意图；
图6为本申请实施例提供的一种IAB网络架构图的示例；
图7为本申请实施例提供的一种IAB网络的BAP拓扑的示例；
图8为本申请实施例提供的一种路由方法流程图；
图9为本申请实施例提供的另一种路由方法流程图；
图10为本申请实施例提供的另一种路由方法流程图；
图11为本申请实施例提供的另一种路由方法流程图；
图12为本申请实施例提供的另一种路由方法流程图；
图13为本申请实施例提供的另一种路由方法流程图；
图14为本申请实施例提供的一种通信装置的结构示意图；
图15为本申请实施例提供的通信装置的结构示意图；
图16为本申请实施例提供的通信装置的另一种结构示意图；
图17为本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
本申请的说明书、权利要求书及附图中的术语“第一”和“第二”等仅用于区别不同对象，而不是用于限定多个对象的顺序、时序、优先级或者重要程度。本申请实施例中“多个”是指两个或两个以上。此外，术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备等，没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元等，或可选地还包括对于这些过程、方法、产品或设备等固有的其它步骤或单元。另外，字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
在本文中提及的“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员可以显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在介绍本申请之前，首先对本申请实施例中的部分用语进行简单解释说明，以便于本领域技术人员理解。
1)终端侧设备，是一种向用户提供语音和/或数据连通性的设备。在本申请实施例中，终端侧设备可以称为用户设备(user equipment，UE)、终端设备、终端、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。例如终端侧设备可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的通信设备。终端侧设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。
一些终端侧设备的举例为：移动站(mobile station，MS)、用户单元(subscriber unit)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant，PDA)、电脑、平板型电脑、无线调制解调器(modem)、手持设备(handset)、膝上型电脑(laptop computer)、机器类型通信(machine type communication,MTC)终端、可穿戴设备、车载终端设备等。终端侧设备还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。终端侧设备还包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
终端侧设备的功能可以通过终端设备内部的硬件部件来实现，上述硬件部件可以为上述终端设备内部的处理器和/或可编程的芯片。可选的，该芯片可以通过专用集成电路(application-specific integrated circuit，ASIC)实现，或可编程逻辑器件(programmable logic device，PLD)实现。上述PLD可以是复杂程序逻辑器件(complex programmable logical device，CPLD)，现场可编程门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)，片上系统(system on a chip，SOC)中的任一项或其任意组合。
2)宿主基站(donor gNodeB)，也可以称为宿主节点，通过宿主节点可以接入核心网。也就是说，宿主基站是通信系统中将终端侧设备接入到核心网的设备。宿主基站一般通过有线链路(例如光纤线缆)连接到核心网。宿主基站可负责接收核心网的数据并转发给无线回 传设备(例如IAB节点)，或者接收无线回传设备的数据并转发给核心网。宿主基站一般可以通过有线的方式连接到网络。
作为一种示例，宿主基站可以包括无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)等，也可以包括演进的LTE系统(LTE-Advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括第五代移动通信技术(fifth generation，5G)新无线(new radio，NR)系统中的下一代节点B(next generation node B，gNB)等。作为另一种示例，宿主基站可以包括集中单元(centralized unit，CU)(本申请中简称为Donor-CU或者gNB-CU)和分布单元(distributed unit，DU)(本申请中简称为Donor-DU或者gNB-DU)。gNB-CU和gNB-DU通过F1接口相连，F1接口又可以进一步包括控制面接口(F1-C)和用户面接口(F1-U)。Donor-CU和核心网之间通过下一代(next generation，NG)接口相连。其中，gNB-CU或者Donor-CU还可以是以用户面(User plane，UP)(本申请中简称为CU-UP)和控制面(Control plane，CP)(本申请中简称为CU-CP)分离的形态存在，即gNB-CU或者Donor-CU由CU-CP和CU-UP组成。一个gNB-CU可以包括一个gNB-CU-CP和至少一个gNB-CU-UP。或者，一个Donor-CU可以包括一个Donor-CU-CP和至少一个Donor-CU-UP。
宿主基站的功能可以是由宿主基站内部的硬件部件实现，例如，上述宿主基站内部的处理器和/或可编程的芯片。例如，该芯片可以通过ASIC实现，或PLD实现。上述PLD可以是CPLD、FPGA、GAL、SOC中任一项或其任意组合。
下面介绍与本申请实施例相关的技术特征。
在IAB网络中，IAB节点可以与一个或多个上级节点建立无线回传链路，并通过上级节点接入核心网。上级节点可通过多种信令对中继节点进行一定的控制(例如，数据调度、定时调制、功率控制等)。另外，中继节点可以与一个或多个下级节点建立接入链路，并为一个或多个下级节点提供接入服务。中继节点的上级节点可以是基站，也可以是另一个中继节点。中继节点的下级节点可以是终端，也可以是另一个中继节点。在某些情形下，一个IAB节点的上级节点也可以称为其上游节点或父节点，该IAB节点的下级节点也可以称为其下游节点或子节点。
图1示出了一种IAB系统，IAB节点为UE提供无线接入和接入业务的无线回传。IAB宿主节点(IAB donor节点)向IAB节点提供无线回传功能，并提供UE与核心网的接口。IAB节点通过无线回传链路连接到IAB donor节点，从而使IAB节点所服务的UE与核心网进行连接。
图2示出了IAB节点的一种结构示意图。NR中的IAB节点可分为MT与DU两部分。MT也可以理解为类似UE的一个组件在IAB节点中，MT被称为驻留在IAB节点上的功能。由于MT类似一个普通UE的功能，那么可以理解为MT用于IAB节点与上级节点通信。DU是相对网络设备的CU功能而言的，DU用于IAB节点与下级节点通信。应理解，上级节点可以是基站或者其他IAB节点，下级节点可以是UE或者其他IAB节点。
本申请实施例提供的路由方法可以应用于包括中继节点的各种通信系统，例如NR系统、LTE系统、LTE-A系统、全球微波互联接入(worldwide interoperability for microwave access，WiMAX)，或无线局域网络(wireless local area networks，WLAN)等。在LTE中，中继节点一般被称为RN。在NR中，中继节点一般被称为IAB节点。在一些实施例中，中继节点也可以称为中继设备，或者中继传输接收点(relay transmission and receptio point， rTRP)，中继节点的上级节点可以是网络设备(包括网络设备的DU，或者包括网络设备的CU等)。
图3示出了包括多个UE和多个IAB节点的IAB网络的一种示例。图3以包括2个UE和5个IAB节点为例。其中，这2个UE分别为UE1和UE2，这5个IAB节点分别为IAB节点1～IAB节点5。应理解，图3粗线示意接入链路，细线示意回传链路。其中，UE2可经由IAB节点5、IAB节点2和IAB节点1与宿主基站相连。UE2也可经由IAB节点4、IAB节点2和IAB节点1与宿主基站相连。或者UE2也可经由IAB节点4、IAB节点3和IAB节点1与宿主基站相连。UE1可经由IAB节点4、IAB节点3和IAB节点1与宿主基站相连。UE1可经由IAB节点4、IAB节点2和IAB节点1与宿主基站相连。
需要说明的是，图3所示的通信系统只是一种示例，并不对本申请实施例适用的应用场景构成限定。应理解，本申请实施例中采用IAB节点仅仅出于描述的需要，并不表示本申请实施例的方案仅用于NR的场景。在本申请实施例中，IAB节点可以泛指任何具有中继功能的节点或设备，本申请实施中的IAB节点和中继节点的使用应理解具有相同的含义。
在IAB网络中，IAB节点经IAB宿主节点连接到核心网。例如，在独立组网(standalone，SA)的5G架构下，IAB节点经IAB宿主节点连接到5G核心网(5G core network，5GC/5GCN)。又例如，在双连接(dual connectivity，DC)或者多连接(multi-connectivity，MC)的5G架构下(例如：非独立组网(non-standalone，NSA场景等)，在主路径上，IAB节点可以经演进型基站(evolved NodeB，eNB)连接到演进分组核心网(evolved packet core，EPC)，也可以经IAB宿主连接到5G核心网。
在IAB网络中，在UE和IAB宿主之间的一条传输路径上，可以包含一个或多个IAB节点。每个IAB节点需要维护面向父节点的无线回传链路，还需要维护与子节点之间的无线链路。若IAB节点的子节点是UE，该IAB节点和其子节点(即UE)之间是无线接入链路。若IAB节点的子节点是其他IAB节点，该IAB节点和其子节点(即其他IAB节点)之间是无线回传链路。参见图3，在路径“UE1→IAB节点4→IAB节点3→IAB节点1→IAB宿主”中，UE1通过无线接入链路接入IAB节点4，IAB节点4通过无线回传链路连接到IAB节点3，IAB节点3通过无线回传链路连接到IAB节点1，IAB节点1通过无线回传链路连接到IAB宿主节点。
本申请实施例中，接入IAB节点是指UE接入的IAB节点，中间IAB节点是指为UE或者IAB节点提供无线回传服务的IAB节点。示例性的，参阅图3，在路径UE1→IAB节点4→IAB节点3→IAB节点1→IAB宿主”中，IAB节点4为接入IAB节点，IAB节点3和IAB节点1为中间IAB节点。需要说明的是，一个IAB节点针对接入该IAB节点的UE而言，是接入IAB节点；针对接入其他IAB节点的UE，是中间IAB节点。因此，一个IAB节点具体是接入IAB节点还是中间IAB节点，并不是固定的，可以根据具体的应用场景确定。
IAB节点的DU和IAB宿主的CU之间有F1接口。该F1接口可包含控制面和用户面两部分，其中用户面的部分是IAB-DU与IAB donor CU-UP之间维护的，而控制面部分是IAB-DU与IAB donor CU-CP之间维护的。当然该F1接口也可以称为F1*接口，本申请实施例对该接口的名称不作限制。且本文中以该接口称为F1接口为例。
F1接口可支持用户面协议(F1-U/F1*-U)和控制面协议(F1-C/F1*-C)，用户面协议包括以下协议层的一个或多个：通用分组无线服务(general packet radio service，GPRS)隧道协议用户面(GPRS tunnelling protocol user plane，GTP-U)协议层，用户数据报协议(user datagram protocol，UDP)协议层、因特网协议(internet protocol，IP)协议层等；控制面协议包括以下协议层中的一个或者多个：F1应用协议(F1 application protocol， F1AP)、流控传输协议(stream control transport protocol，SCTP)、IP协议层等。通过F1/F1*接口的控制面，IAB节点和IAB宿主之间可以进行执行接口管理、对IAB-DU进行管理，以及执行UE上下文相关的配置等。通过F1/F1*接口的用户面，IAB节点和IAB宿主之间可以执行用户面数据的传输，以及下行传输状态反馈等功能。
示例性的，请参见图4和图5，其中图4为IAB网络中的控制面协议架构的示意图，图5为IAB网络中的用户面协议架构的示意图。
对于控制面而言，如图4所示，UE1和IAB2-DU之间建立有Uu接口，对等的协议层包括无线链路层控制协议(radio link control，RLC)层、媒体介入控制层(media access control，MAC)层和物理层(physical layer，PHY)层。IAB2-DU和IAB donor CU 1建立有F1-C接口，对等的协议层包括F1AP层、SCTP层。IAB donor DU 1和IAB donor CU 1之间通过有线连接，对等的协议层包括互联网协议(internet protocol，IP)层、L2和L1。IAB节点2和IAB节点3之间、IAB节点3和IAB节点1之间，以及IAB节点1和IAB donor DU 1之间均建立有BL，对等的协议层包括回传适配协议(bakhaul adaptation protocol，BAP)层、RLC层、MAC层以及PHY层。另外，UE1和IAB donor CU 1之间建立有对等的无线资源控制(radio resource control，RRC)层和分组数据汇聚协议(packet data convergence protocol，PDCP)层，IAB2-DU和IAB donor DU 1之间建立有对等的IP层。
可以看出，IAB网络的控制面协议栈与单空口的控制面协议栈相比，接入IAB节点的DU实现了单空口的gNB-DU的功能(即与UE建立对等RLC层、MAC层和PHY层的功能，以及与CU建立对等的F1AP层、SCTP层的功能)。也就是说，IAB网络中接入IAB节点的DU实现了单空口的gNB-DU的功能；IAB donor CU实现了单空口的gNB-CU的功能。
在控制面上，RRC消息封装在接入IAB节点和IAB donor CU之间的F1AP消息中传输。具体地，在上行方向上，UE1将RRC消息封装在PDCP协议数据单元(protocol data unit，PDU)中，并依次经过RLC层、MAC层和PHY层的处理后发送至IAB2-DU。IAB2-DU依次经过PHY层、MAC层和RLC层的处理后得到PDCP PDU，将PDCP PDU封装在F1AP消息中，并依次经过SCTP层、IP层处理后得到IP包。IAB2-MT将IP包分别通过BAP层、RLC层、MAC层和PHY层的处理后发送至IAB3-DU。IAB3-DU依次经过PHY层、MAC层、RLC层和BAP层的处理后得到IP包，然后IAB3-MT采用类似于IAB2-MT的操作，将该IP包发送至IAB1-DU。同理，IAB1-MT将该IP包发送至IAB donor DU 1。IAB donor DU 1解析得到IP包后，将该IP包发送至IAB donor CU 1，IAB donor CU 1将该IP包依次通过SCTP层、F1AP层和PDCP层的处理后得到RRC消息。下行方向类似，在此不再描述。
对于用户面而言，如图5所示，UE1和IAB2-DU之间建立有Uu接口，对等的协议层包括RLC层、MAC层和PHY层。IAB2-DU和IAB donor CU 1建立有F1-U接口，对等的协议层包括GTP-U层、用户数据报协议(user datagram protocol，UDP)层。IAB donor DU 1和IAB donor CU 1之间通过有线连接，对等的协议层包括IP层、L2和L1。IAB节点2和IAB节点3之间、IAB节点3和IAB节点1之间，以及IAB节点1和IAB donor DU 1之间均建立有BL，对等的协议层包括BAP层、RLC层、MAC层以及PHY层。另外，UE1和IAB donor CU 1之间建立有对等的SDAP层和PDCP层，IAB2-DU和IAB donor DU 1之间建立有对等的IP层。
可以看出，IAB网络的用户面协议栈与单空口的用户面协议栈相比，IAB接入节点的DU实现了单空口的gNB-DU的部分功能(即与终端建立对等RLC层、MAC层和PHY层的功能，以及与IAB donor CU 1建立对等的GTP-U层、UDP层的功能)。可以理解，IAB接入节点的DU实现了单空口的gNB-DU的功能；IAB donor CU实现了单空口的gNB-CU的功能。
在用户面上，PDCP数据包封装在接入IAB节点和IAB donor CU之间的GTP-U隧道中传输。GTP-U隧道建立在F1-U接口上。
本申请提供的路由方法主要应用于IAB网络，包括独立组网(SA)的IAB网络，以及非独立组网(NSA)的IAB网络。IAB节点包含MT部分和DU部分，IAB donor可以进一步分为DU和CU部分，CU还可分为CU-CP和CU-UP部分。图6为本申请实施例提供的一种IAB网络架构图的示例。图6展示IAB节点通过无线回传链路连接到IAB donor的示例。
图6以包括1个UE、2个IAB节点以及2个IAB donor为例。其中，这两个IAB节点为IAB节点1和IAB节点2，这两个IAB节点均包括MT部分和DU部分；这两个IAB donor分别为IAB donor 1和IAB donor 2。这2个IAB donor为IAB donor 1和IAB donor 2，每个IAB donor可以进一步分为DU和CU部分，CU还可分为CU-CP和CU-UP部分。图6中，IAB节点2的MT和IAB节点1的DU之间、IAB节点1的MT与IAB donor 1的DU之间以及IAB节点1的MT与IAB donor 2的DU之间均通过无线回传(backhual，BH)链路(link)通信；UE和IAB2-DU之间建立有Uu接口；IAB donor DU与IAB donor CU-CP之间建立有F1-C接口，IAB donor DU与IAB donor CU-UP之间建立有F1-U接口；IAB donor 2的DU与IAB donor 1的CU之间通过IP network连接。
在IAB节点工作在SA模式时，IAB node可以单连接到一个父节点，或者双连接到两个父节点。其中这两个父节点可以由同一个IAB donor控制，或者分别由不同的IAB donor控制。IAB node的DU部分与一个IAB donor之间建立F1接口即可，该IAB donor可以连接到5G核心网，即图6中的虚线部分。其中IAB-donor-CU-CP通过NG控制面接口(NG-C)连接到5GC中的控制面网元(例如接入和移动性管理功能)，IAB-donor-CU-UP通过NG用户面接口(NG-U)连接到5GC中的用户面网元(例如用户面功能)。
当IAB节点工作在NSA模式时，IAB-donor-CU-UP可以通过S1用户面接口(S1-U)连接到EPC(例如连接到业务网关(serving gateway，SGW))，MeNB与IAB node的MT之间有LTE Uu空口连接，MeNB与IAB-donor-CU-CP之间有X2-C接口，MeNB通过S1接口连接到EPC(包括S1接口用户面，以及S1接口控制面)。
另一种可能的情况，图6中的MeNB也可以换成5G的基站gNB。图6中的LTE-Uu接口相应的被替换为NR-Uu接口，gNB可以和5GC之间建立用户面和/或控制面的接口，gNB和IAB-donor为IAB节点提供双连接服务，gNB可以作为IAB节点的主基站的角色，或者辅基站的角色。
本申请提供的路由方法用于解决IAB网络中的边界节点(boundary node)的数据转发问题。或者说，本申请提供的路由方法用于解决IAB网络中的边界节点如何将经过它的数据包路由至正确的路径的问题。IAB网络中的边界节点可以称为边界IAB节点，或简称边界节点。IAB网络中的边界节点具备以下特性：边界节点的DU终止于的IAB-donor-CU与其至少一个父节点的DU终止于的IAB-donor-CU不同。边界IAB节点(Boundary IAB node)的定义可以如下：IAB-node,whose IAB-DU is terminated to a different IAB-donor-CU than a parent DU。假定IAB网络中的一个IAB节点有两个父节点，该IAB节点的DU终止于IAB-donor 1的CU，该IAB节点的一个父节点的DU终止于IAB-donor 1的CU，该IAB节点的另一个父节点的DU终止于IAB-donor 2的CU，则该IAB节点为边界节点。
图7为本申请实施例提供的一种IAB网络的BAP拓扑的示例。本申请中，BAP拓扑是指BAP层的拓扑。图7中，IAB-MT1和IAB-DU1为IAB节点1包括的两部分，IAB-MT2和IAB-DU2为IAB节点2包括的两部分，IAB-MT3和IAB-DU3为IAB节点3包括的两部分，IAB-MT4和 IAB-DU4为IAB节点4包括的两部分。如图7所示，实线框中的拓扑表示受Donor-CU1控制的BAP拓扑1和虚线框中的拓扑表示受Donor-CU2控制的BAP拓扑2。其中，BAP拓扑1包括IAB节点1、IAB节点2以及IAB节点4；BAP拓扑2包括IAB节点3。图7中，IAB节点2的MT，即IAB-MT2通过双连接分别连接至Donor-DU1和Donor-DU2。其中，IAB节点2的F1接口终结于CU1，即CU1是IAB节点2的F1-termination节点。针对这种BAP拓扑，可能会出现一个IAB节点的业务或者IAB节点下连接的UE的业务可经由几类不同的节点所传输。这几类不同的节点可能包含CU1所管理的IAB节点(例如IAB节点4)，CU2管理的IAB节点(例如，IAB节点3)。
如图7所示，IAB节点2可接收CU1经Donor-DU1和IAB节点1下发的数据包(参阅图7中的实线箭头表示的路径)，也可接收CU1经Donor-DU2和IAB节点3下发的数据包(参阅图7中的虚线箭头表示的路径)。IAB节点2为图7所示IAB网络中的边界节点。因为IAB节点2的F1接口终结于CU1(IAB节点2的DU终止于CU1)，IAB节点2的一个父节点(IAB节点3)的DU终止于CU2。
IAB节点2作为边界节点，需要将经过它的数据包路由至正确的路径。图7中，受CU1控制(或者说管理)的BAP拓扑1内的各IAB节点可识别的BAP routing ID与受CU2控制(或者说管理)的BAP拓扑2内的各IAB节点可识别的BAP routing ID不同。也就是说，BAP拓扑1内的各IAB节点可识别的BAP routing ID对于受CU2控制(或者说管理)的BAP拓扑2内的各IAB节点来说，是不可识别的。同样，BAP拓扑2内的各IAB节点可识别的BAP routing ID对于受CU1控制的BAP拓扑1内的各IAB节点来说，也是不可识别的。针对下行数据包，IAB节点2需要对来自BAP拓扑2的数据包的BAP routing ID进行rewriting，将其转化为BAP拓扑1内的IAB节点可识别的BAP routing ID之后，才能转发给下游节点。类似的，针对上行数据包，如果IAB节点2接收的数据包需要经过BAP拓扑2传输，则IAB节点2需要将数据包原有的BAP拓扑1内的BAP routing ID rewriting成为BAP拓扑2内的IAB节点可以识别的BAP routing ID，才能转发给其在BAP拓扑2内的上游IAB节点。可见，对于IAB网络中的边界节点(例如IAB节点2)来说，若要将经过它的数据包路由至正确的路径，则需要准确地判断是否需要rewriting数据包的BAP routing ID。本申请提供的路由方法能够准确地判断是否需要rewriting数据包的BAP routing ID的问题，并将经过边界节点的数据包路由至正确的路径。
下面结合附图介绍本申请实施例提供的路由方法。图8为本申请实施例提供的一种路由方法流程图。本申请实施例提供的路由方法可应用于IAB网络，该IAB网络包括第一BAP拓扑和第二BAP拓扑，该第一BAP拓扑由第一宿主节点管理，该第二BAP拓扑由第二宿主节点管理，该第一宿主节点与该第二宿主节点不同。如图8所示，该方法包括：
801、第一IAB节点接收第一数据包。
第一IAB节点由第一宿主节点管理，第一IAB节点的至少一个父节点由第二宿主节点管理。也就是说，第一IAB节点为IAB网络中的一个边界节点。第一IAB节点属于第一BAP拓扑。第一数据包可以是下行数据包，即来自第一IAB节点的上游节点的数据包。
图7展示的IAB网络可以是图8中的方法适用的一种IAB网络的示例。其中，第一BAP拓扑对应于BAP拓扑1，第二BAP拓扑对应于BAP拓扑2，第一宿主节点对应于CU1，第二宿主节点对应于CU2，第一IAB节点对应于IAB节点2。
在一种可能的实现方式中，上述方法还包括：在第一IAB节点与其父节点之间的第一无线链路发生了无线链路失败(radio link failure，RLF)的情况下，第一IAB节点在恢复 (recovery)上述第一无线链路的过程中或之前，向其子节点发送第四指示信息；上述第四指示信息指示上述第一IAB节点发生RLF且发送上述第四指示信息的时间在恢复上述第一无线链路的过程中或之前。上述第四指示信息的力度可以是BAP地址(addrese)或者回传(backhual，BH)链接(link)。在该实现方式中，在第一IAB节点可以及时通知其子节点，第一IAB节点与其父节点之间发生RLF。进一步的，在上述第一IAB节点与上述第一父节点之间的上述第一无线链路恢复成功之后，上述第一IAB节点向其子节点发送第五指示信息；上述第五指示信息指示上述第一IAB节点的RLF恢复成功。在该实现方式中，第一IAB节点向其子节点发送第五指示信息；可以通知其子节点，RLF恢复成功。
802、第一IAB节点根据接收第一数据包的入口链路所对应的BAP拓扑以及第一IAB节点所属的BAP拓扑，处理第一数据包。
第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑可以是向第一IAB节点发送上述第一数据包的IAB节点所属的BAP拓扑。第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑可以是第一BAP拓扑和第二BAP拓扑中的一个。在一些实施例中，第一IAB节点在接收到第一数据包之后，可将发送第一数据包的IAB节点所属的BAP拓扑作为接收第一数据包的入口链路所对应的BAP拓扑。例如，第一IAB节点接收其上游节点1发送的第一数据包，该上游节点1所属的BAP拓扑为第一IAB节点根据接收第一数据包的入口链路所对应的BAP拓扑。由于向第一IAB节点发送第一数据包的IAB节点所属的BAP拓扑与第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑相同，因此步骤801可替换为：第一IAB节点根据发送第一数据包的IAB节点所属的BAP拓扑以及第一IAB节点所属的BAP拓扑，处理第一数据包。第一IAB节点知道其所属的BAP拓扑。在一些实施例中，第一IAB节点属于第一BAP拓扑，即该第一IAB节点所属的BAP拓扑为第一BAP拓扑。在一些实施例中，第一IAB节点中的配置信息指示该第一IAB节点所属的BAP拓扑。在这些实施例中，第一IAB节点可根据其配置信息确定其所属的BAP拓扑。
第一IAB节点接收下行数据包的入口链路(ingress link)可以包括第一入口链路和第二入口链路，该第一入口链路所对应的BAP拓扑为第一BAP拓扑，该第二入口链路所对应的BAP拓扑为第二BAP拓扑。应理解，若第一IAB节点通过第一入口链路接收第一数据包，则第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑；若第一IAB节点通过第二入口链路接收第一数据包，则第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第二BAP拓扑。在一些实施例中，第一IAB节点可存储有第一入口链路与第一BAP拓扑的第一对应关系以及第二入口链路与第二BAP拓扑的第二对应关系，第一IAB节点根据该第一对应关系可确定第一入口链路对应于第一BAP拓扑，第一IAB节点根据该第二对应关系可确定第二入口链路对应于第二BAP拓扑。在一些实施例中，第一IAB节点可存储有每个入口链路与其所对应的BAP拓扑的对应关系，该第一IAB节点根据这些对应关系可确定接收下行数据包的任意入口链路所对应的BAP拓扑。
在一些实施例中，步骤802可替换为：第一IAB节点根据第一数据包中的第二指示信息以及第一IAB节点所属的BAP拓扑，处理第一数据包。上述第二指示信息指示上述第一数据包的目的BAP地址由上述第一宿主节点分配。或者，上述第二指示信息指示上述第一数据包的目的BAP地址由上述第二宿主节点分配。第二指示信息可以包含于第一数据包的包头。例如，第二指示信息可以是在已有的BAP地址上额外增加的指示信息(占用一个或多个比特)。举例来说，第二指示信息为在已有的BAP地址上额外增加的两个比特；若该第二指示信息为00，则该第二指示信息指示目的BAP由第一宿主节点分配；若该第二指示信息为11，则该第 二指示信息指示目的BAP由第二宿主节点分配。应理解，若第二指示信息指示上述第一数据包的目的BAP地址由上述第一宿主节点分配，则表明第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑；若第二指示信息指示上述第一数据包的目的BAP地址由上述第二宿主节点分配，则表明第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第二BAP拓扑。
第一IAB节点根据第二指示信息和第一IAB节点所属的BAP拓扑，可确定是否rewriting第一数据包的BAP routing ID。举例来说，第一IAB节点在其属于第一BAP拓扑以及第二指示信息指示第一数据包的目的BAP地址由第二宿主节点分配的情况下，判断rewriting第一数据包的BAP routing ID。又举例来说，第一IAB节点在其属于第一BAP拓扑以及第二指示信息指示第一数据包的目的BAP地址由第一宿主节点分配的情况下，判断不rewriting第一数据包的BAP routing ID。从宿主节点的角度来说，第一宿主节点和第二宿主节点在通过对方控制的BAP拓扑转发下行数据包时，指示(例如通过第二指示信息)该下行数据包的BAP地址是由哪个宿主节点分配的。这样当边界节点(例如第一IAB节点)在收到下行数据包后，即可直接判断是否需要进行rewriting等操作。
在一些实施例中，步骤802可替换为：第一IAB节点根据第一数据包中的第三指示信息，处理第一数据包；上述第三指示信息指示改写上述第一数据包的目的BAP地址，或者，上述第三指示信息指示不改写上述第一数据包的目的BAP地址。上述第三指示信息指示改写上述第一数据包的目的BAP地址可理解为上述第三指示信息指示上述第一数据包的目的BAP地址为伪BAP地址。上述第三指示信息指示不改写上述第一数据包的目的BAP地址可理解为第三指示信息指示上述第一数据包的目的BAP地址为真实的BAP地址(非伪BAP地址)。第三指示信息可占用第一数据包的包头中的一个或多个比特。例如，第三指示信息为可以是在已有的BAP地址上额外增加的指示信息(占用一个或多个比特)。举例来说，第三指示信息为在已有的BAP地址上额外增加的两个比特；若该第三指示信息为00，则该第三指示信息指示不改写上述第一数据包的目的BAP地址；若该第三指示信息为11，则该第三指示信息指示改写上述第一数据包的目的BAP地址。
第一IAB节点对于接收到的下行数据包(例如第一数据包)可判断是否rewriting该下行数据包的BAP routing ID。应理解，第一IAB节点在能够准确地判断是否rewriting接收的第一数据包的BAP routing ID时，才能保证将该第一数据包路由至正确的路径。
本申请实施例中，第一IAB节点根据接收第一数据包的入口链路所对应的BAP拓扑以及该第一IAB节点所属的BAP拓扑能够准确地判断是否rewriting接收的第一数据包的BAP routing ID，进而将该第一数据包路由至正确的路径。
下面介绍步骤802一些可能的示例。
示例一
在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑且未满足第一条件的情况下，第一IAB节点根据第二BAP路由标识和路由表转发第一数据包；上述第一条件包括：第一BAP地址与第二BAP地址相匹配；上述第二BAP路由标识由改写上述第一数据包的第一BAP路由标识得到，上述第一BAP路由标识包含上述第一数据包的目的BAP地址和路径标识；
上述第一BAP地址由改写上述第一数据包的目的BAP地址得到，上述第二BAP地址是上述第一宿主节点为上述第一IAB节点分配的BAP地址；
或者，上述第一BAP地址为上述第一数据包的目的BAP地址，上述第二BAP地址是上述 第二宿主节点为上述第一IAB节点分配的BAP地址。
第一BAP地址与第二BAP地址相匹配可以第一BAP地址与第二BAP地址相同，也可以是第一BAP地址与第二BAP地址之间满足特定的映射关系，本申请不作限定。本申请中，两个地址(例如两个BAP地址)相匹配可以是指两个地址相同，也可以是指两个地址之间满足特定的映射关系，本申请不作限定。
在一些实施例中，第一IAB节点可改写(rewriting)第一数据包的目的BAP地址以得到第一BAP地址。其中，第一BAP地址为第二BAP拓扑内的IAB节点可识别的BAP地址。在示例一中，第一IAB节点在第一IAB节点根据第二BAP路由标识和路由表转发第一数据包之前，可执行如下操作：第一IAB节点将上述第一数据包的第一BAP路由标识改写为第二BAP路由标识。例如，第一IAB节点查找改写表(rewriting table)中与第一数据包的第一BAP路由标识相对应的第二BAP路由标识，该第二BAP路由标识包含的BAP地址即为第一BAP地址。第一IAB节点根据第二BAP路由标识和路由表转发第一数据包可以是：第一IAB节点根据路由表中与第二BAP路由标识相匹配的下一跳BAP地址，转发上述第一数据包。若路由表中未包含与第二BAP路由标识相匹配的下一跳BAP地址，则丢弃第一数据包。
第一条件可理解为在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑时，第一IAB节点判断是否转发第一数据包的条件。若满足第一条件，则第一IAB节点将第一数据包递交给第一IAB节点的BAP层的上层；若未满足该第一条件，则第一IAB节点转发第一数据包。第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑是否为第一BAP拓扑可理解为是否改写第一数据包的BAP路由标识的条件。若第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑，第一IAB节点不需要改写第一数据包的BAP路由标识；若第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑，则第一IAB节点可改写第一数据包的BAP路由标识，并利用改写后的BAP路由标识转发第一数据包。
在一种可能的实现方式中，上述第一条件还包括：上述第一数据包包含的第一指示信息指示将上述第一数据包递交给上述第一IAB节点的BAP层的上层。在一些实施例中，第一指示信息可以包含于第一数据包所包含的路径标识。第一指示信息可以是在已有的路径标识上额外增加的指示信息(占用一个或多个比特)。举例来说，第一指示信息为在已有的路径标识上额外增加的两个比特；若该第一指示信息为00，则该第一指示信息指示不递交上层；若该第一指示信息为11，则该第一指示信息指示递交上层(即将第一数据包递交给上层)。在该实现方式中，能够避免错误的将第一数据包递交给第一IAB节点的BAP层的上层。
本申请中，第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑可替换为：第一数据包中的第二指示信息指示上述第一数据包的目的BAP地址由上述第二宿主节点分配，或者，第一数据包中的第三指示信息指示改写上述第一数据包的目的BAP地址。
在示例一中，在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑且未满足第一条件的情况下，第一IAB节点根据第二BAP路由标识和路由表转发第一数据包；能够将第一数据包路由至正确的路径。
示例二
在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑且满足第一条件的情况下，第一IAB节点向第一IAB节点的BAP层的上层递交第一数据包；上述第一条件包括：第一BAP地址与第二BAP地址相匹配；
上述第一BAP地址由改写上述第一数据包的目的BAP地址得到，上述第二BAP地址是上述第一宿主节点为上述第一IAB节点分配的BAP地址；
或者，上述第一BAP地址为上述第一数据包的目的BAP地址，上述第二BAP地址是上述第二宿主节点为上述第一IAB节点分配的BAP地址。
若第一BAP地址由改写上述第一数据包的目的BAP地址得到，则第一BAP地址为第一IAB节点可识别的BAP地址(对应于第一宿主节点为第一IAB节点分配的BAP地址)。通过判断第一BAP地址与第一宿主节点为第一IAB节点分配的BAP地址是否匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包。
当第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑时，第一数据包的BAP地址是第二宿主节点分配的。因此，第一IAB节点通过判断第一数据包的目的BAP地址与第二宿主节点为第一IAB节点分配的BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包。
在示例二中，在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑不为第一BAP拓扑且满足第一条件的情况下，第一IAB节点向第一IAB节点的BAP层的上层递交第一数据包；能够将第一数据包路由至正确的路径。
示例三
在第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑且第三BAP地址与第四BAP地址不匹配的情况下，上述第一IAB节点根据路由表转发上述第一数据包；上述第三BAP地址为上述第一数据包的目的BAP地址，上述第四BAP地址是上述第一宿主节点为上述第一IAB节点分配的BAP地址。
当第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑时，第一数据包的BAP地址是第一宿主节点分配的。第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包。
本申请中，第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑可替换为：第一数据包中的第二指示信息指示上述第一数据包的目的BAP地址由上述第一宿主节点分配，或者，第一数据包中的第三指示信息指示不改写上述第一数据包的目的BAP地址。
示例四
在上述第一IAB节点接收上述第一数据包的入口链路所对应的BAP拓扑为上述第一BAP拓扑且第三BAP地址与第四BAP地址相匹配的情况下，上述第一IAB节点向上述第一IAB节点的BAP层的上层递交上述第一数据包；上述第三BAP地址为上述第一数据包的目的BAP地址，上述第四BAP地址是上述第一宿主节点为上述第一IAB节点分配的BAP地址。
当第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑时，第一数据包的BAP地址是第一宿主节点分配的。第一IAB节点通过判断第三BAP地址与第四BAP地址是否相匹配，可准确地判断是否需要向第一IAB节点的BAP层的上层递交第一数据包。
前面介绍了步骤802一些可能的示例，下面结合附图介绍图8中的方法流程一些可能的实现方式。图9为本申请实施例提供的另一种路由方法流程图。图9中的方法流程为图8中的方法流程的一种可能的实现方式。如图9所示，该方法包括：
901、第一IAB节点接收第一数据包。
902、第一IAB节点判断第一数据包是否来自第二BAP拓扑。
若是，执行步骤903；若否，执行步骤904。若第一数据包来自属于第二BAP拓扑的IAB 节点，则第一IAB节点判断第一数据包来自第二BAP拓扑；若第一数据包不是来自属于第二BAP拓扑的IAB节点，则第一IAB节点判断第一数据包不是来自第二BAP拓扑。
步骤902可替换为：第一IAB节点判断第一数据包是否来自第一BAP拓扑。若是，执行步骤904；若否，执行步骤903。
步骤902可替换为：判断第一数据包是否来自辅小区组(secondary cell group,SCG)。若是，执行步骤903；若否，执行步骤904。或者，步骤902可替换为：判断第一数据包是否来自主小区组(master cell group,MCG)。若是，执行步骤904；若否，执行步骤903。其中，第一IAB节点属于MCG。
步骤902可替换为：判断第一数据包是否来自SCG。若是，执行步骤904；若否，执行步骤903。或者，步骤902可替换为：判断第一数据包是否来自MCG。若是，执行步骤903；若否，执行步骤904。其中，第一IAB节点属于SCG。
在一些实施例中，步骤902可替换为：判断接收第一数据包的入口链路所对应的拓扑ID是否指示第二BAP拓扑。若是，执行步骤903；若否，执行步骤904。在一些实施例中，第一宿主节点可提前给第一IAB节点配置入口链路的链路ID与拓扑ID的映射关系。具体地，第一宿主节点可以通过向第一IAB节点的MT侧发送RRC消息，利用该消息中的新信元CellGroupConfig来携带该映射关系。或者，第一宿主节点也可以向第一IAB节点的DU侧发送F1AP消息，该F1AP消息可携带该映射关系。拓扑ID可以用0-1表示，例如规定ID＝0为第一BAP拓扑，其它为第二BAP拓扑。
在一些实施例中，步骤902可替换为：判断第一数据包的包头中的BAP路由ID是否匹配第一BAP拓扑的路由表。若是，执行步骤904；若否，执行步骤903。
在一些实施例中，步骤902可替换为：判断第一数据包的包头中的BAP地址是否属于第一BAP地址集合。若是，执行步骤903；若否，执行步骤904。在一些实施例中，第二宿主节点可通过第一宿主节点提前给第一IAB节点配置第一BAP地址集合，例如，第一BAP地址集合可以是或者必须包括第二宿主节点给第一IAB节点及其后代节点所分配的伪BAP地址构成的集合。第一BAP地址集合中的所有BAP地址可提前配置在步骤903中改写表的原始BAP路由标识一栏中。
在一些实施例中，步骤902可替换为：判断第一数据包的包头中的BAP路径ID是否属于第一BAP路径ID集合。若是，执行步骤903；若否，执行步骤904。在一些实施例中，第二宿主节点可通过第一宿主节点提前给第一节点配置第一BAP路径ID集合，例如，第一BAP路径ID集合可以是或者必须包括第二宿主节点分配的用于指示到第一IAB节点及其后代节点的特殊路径ID构成的集合。第一BAP路径ID集合中的所有BAP路径ID可提前配置在步骤903中改写表的原始BAP路由标识一栏中。
在一些实施例中，第一IAB节点判断第一数据包是否来自第二BAP拓扑替换为：第一IAB节点判断接收第一数据包的入口链路所对应的BAP拓扑是否为第二BAP拓扑。若是，执行步骤903；若否，执行步骤904。在一些实施例中，第一IAB节点接收下行数据包的入口链路可以包括第一入口链路和第二入口链路，该第一入口链路所对应的BAP拓扑为第一BAP拓扑，该第二入口链路所对应的BAP拓扑为第二BAP拓扑。应理解，若第一IAB节点通过第一入口链路接收第一数据包，则第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第一BAP拓扑；若第一IAB节点通过第二入口链路接收第一数据包，则第一IAB节点接收第一数据包的入口链路所对应的BAP拓扑为第二BAP拓扑。
903、第一IAB节点将第一数据包的第一BAP路由标识改写为第二BAP路由标识。
第一BAP路由标识可理解为第一数据包的原始的BAP路由标识或者第一数据包当前的BAP路由标识(BAP routing ID)。第一BAP路由标识可包含第一数据包的目的BAP地址和路径标识(path ID)。
步骤903一种可能的实现方式如下：检查第一数据包的第一BAP路由标识是否匹配改写表(rewriting table)，即判断第一BAP路由标识是否可以进行rewriting；若匹配，则基于rewriting table将第一BAP路由标识改写为第二BAP路由标识。若第一BAP路由标识不匹配rewriting table，则将第一数据包递交给第一IAB节点的BAP节点的上层。rewriting table可以包含一组或多组BAP路由标识映射关系，每组BAP路由标识映射关系用于将第一IAB节点不可识别的一种BAP路由标识(即第二BAP拓扑内的IAB节点可识别的BAP路由标识)映射为该第一IAB节点可识别的BAP路由标识。检查第一数据包的第一BAP路由标识是否匹配rewriting table可以是：查询rewriting table中是否包含第一BAP路由标识与其他BAP路由标识的映射关系。基于rewriting table将第一BAP路由标识改写为第二BAP路由标识可以是：基于rewriting table获取与第一BAP路由标识存在BAP路由标识映射关系的第二BAP路由标识。
表1为本申请提供的一个rewriting table的示例。参阅表1，第一列为原始BAP路由标识，第二列为改写后的BAP路由标识。应理解，第一列中的各原始BAP路由标识为第二BAP拓扑内的IAB节点可识别的BAP路由标识。或者说，第一列中的各原始BAP路由标识对应于来自属于第二BAP拓扑的下行数据包(例如第一数据包)的BAP路由标识。第二列中的改写后的BAP路由标识为第一IAB节点可识别的BAP路由标识。表1中，每一行的原始BAP路由标识对应于该行中改写后的BAP路由标识。例如，第一行中的第一BAP路由标识对应于第一行中的第二BAP路由标识。举例来说，第一BAP路由标识可查询表1的第一列是否包含第一BAP路由标识；若是，则第一BAP路由标识匹配rewriting table；若否，则第一BAP路由标识不匹配rewriting table。在该举例中，若表1的第一列包含第一BAP路由标识，则获取与第一BAP路由标识存在映射关系的第二BAP路由标识。
表1
原始BAP路由标识 改写后的BAP路由标识
第一BAP路由标识 第二BAP路由标识
第三BAP路由标识 第四BAP路由标识
… …
第(N)BAP路由标识 第(N+1)BAP路由标识
步骤903一种可能的实现方式如下：第一IAB节点直接基于rewriting table对第一BAP路由标识进行rewriting，得到第二BAP路由标识。在该实现方式中，可快速地将第一BAP路由标识改写为第二BAP路由标识，操作较少。
904、判断第一数据包的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址。
若是，执行步骤905；若否，执行步骤906。第一IAB节点可存储有第一宿主节点为第一IAB节点分配的BAP地址。判断第一数据包的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址可以是：判断第一数据包的BAP地址与第一宿主节点为第一IAB节点分配的BAP地址是否相同。
在第一数据包不是来自第二BAP拓扑的情况下，步骤904可以是：判断第一数据包的目的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址。
在第一数据包来自第二BAP拓扑的情况下，步骤904可以是：判断第一数据包的改写BAP 地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址；上述改写BAP地址为上述第二BAP路由标识包含的BAP地址。
905、第一IAB节点向第一IAB节点的BAP层的上层递交第一数据包。
906、第一IAB节点根据路由表转发第一数据包。
在第一数据包不是来自第二BAP拓扑的情况下，步骤906可以是：第一IAB节点根据上述路由表中与上述第一BAP路由标识相匹配的下一跳BAP地址，转发上述第一数据包。若路由表中找不到与第一BAP路由标识相匹配的下一跳BAP地址(entry)，则判断第一数据包为错误包，并丢弃该第一数据包。
在第一数据包来自第二BAP拓扑的情况下，步骤906可以是：第一IAB节点根据上述路由表中与上述第二BAP路由标识相匹配的下一跳BAP地址，转发上述第一数据包。若路由表中找不到与第二BAP路由标识相匹配的下一跳BAP地址(entry)，则判断第一数据包为错误包，并丢弃该第一数据包。
在一些实施例中，第一IAB节点的BAP层可以根据第一数据包的BAP地址对其进行路由；也可以对第一数据包的BAP routing ID进行rewriting之后再进行路由。基于这两种方案，可以设置这两种方案的优先级，一种可能的示例如下：如果第一IAB节点配置了rewriting table，则第一IAB节点的BAP层认为后一种方案的优先级比前一种方案的优先级高；否则，仅基于BAP地址的重路由。
本申请实施例中，通过判断第一数据包是否来自第二BAP拓扑，来确定是否改写第一数据包的BAP路由标识，以便将来自第二BAP拓扑的数据包通过路由表转发出去。通过判断第一数据包的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址，来决定是转发第一数据包还是将第一数据包递交给BAP层的上层，可以将第一数据包路由至正确的传输路径，保证了IAB节点和UE数据的稳定传输。
图10为本申请实施例提供的另一种路由方法流程图。图10中的方法流程为图8中的方法流程的一种可能的实现方式。如图10所示，该方法包括：
1001、第一IAB节点接收第一数据包。
1002、第一IAB节点判断第一数据包是否来自第二BAP拓扑。
若是，执行步骤1003；若否，执行步骤1004。步骤1002的实现方式可参阅步骤902。
1003、判断第一数据包的目的BAP地址是否匹配第二宿主节点为第一IAB节点分配的BAP地址。
步骤1003可以是：判断第一数据包的目的BAP地址与第二宿主节点为第一IAB节点分配的BAP地址是否相同。若是，则执行步骤1004；若否，则执行步骤1005。
在一些实施例中，步骤1003可以替换为：判断第一数据包的目的BAP地址是否属于第二BAP地址集合。若是，则执行步骤1005；若否，则执行步骤1004。在一些实施例中，第二宿主节点可通过第一宿主节点给第一IAB节点预先配置第二BAP地址集合。可选的，第二BAP地址集合可以是第二宿主节点为第一IAB节点的后代节点分配的伪BAP地址构成的集合，但不包含给第一IAB节点分配的地址。可选的，第二BAP地址集合中的所有BAP地址可提前配置在步骤1005中改写表的原始BAP路由标识一栏中。
在一些实施例中，步骤1003可以替换为：判断第一数据包的目的BAP路径ID是否属于第二BAP路径ID集合。若是，则执行步骤1005；若否，则执行步骤1004。在一些实施例中，第二宿主节点可通过第一宿主节点给第一IAB节点预先配置第二BAP路径ID集合。可选的，第二BAP路径ID集合可以是第二宿主节点分配的用于指示到第一IAB节点的后代节点的特殊 路径ID构成的集合，但不包含用于指示到第一IAB节点的路径ID。可选的，第二BAP路径ID集合中的所有BAP路径ID可提前配置在步骤1005中改写表的原始BAP路由标识一栏中。
1004、第一IAB节点将第一数据包递交给第一IAB节点的BAP层的上层。
1005、第一IAB节点将第一数据包的第一BAP路由标识改写为第二BAP路由标识。
步骤1005的实现方式请参阅图9中的步骤903。
1006、判断第一数据包的目的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址。
步骤1006可以是：判断第一数据包的目的BAP地址与第一宿主节点为第一IAB节点分配的BAP地址是否相同。若是，则执行步骤1007；若否，则执行步骤1008。
1007、第一IAB节点将第一数据包递交给第一IAB节点的BAP层的上层。
1008、第一IAB节点根据路由表转发第一数据包。
步骤1008的实现方式请参阅图9中的步骤906。
本申请实施例中，通过判断第一数据包是否来自第二BAP拓扑，来确定是否改写第一数据包的BAP路由标识，以便将来自第二BAP拓扑的数据包通过路由表转发出去。在第一数据包来自第二BAP拓扑时，通过判断第一数据包的目标BAP地址是否匹配第二宿主节点为第一IAB节点分配的BAP地址，来决定是转发第一数据包还是将第一数据包递交给BAP层的上层；在第一数据包不是来自第二BAP拓扑时，通过判断第一数据包的目的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址，来决定是转发第一数据包还是将第一数据包递交给BAP层的上层；能够将第一数据包路由至正确的传输路径，保证了IAB节点和UE数据的稳定传输。
图11为本申请实施例提供的另一种路由方法流程图。图11中的方法流程为图8中的方法流程的一种可能的实现方式。如图11所示，该方法包括：
1101、第一IAB节点接收第一数据包。
1102、第一IAB节点判断第一数据包是否来自第二BAP拓扑。
若是，执行步骤1103；若否，执行步骤1104。步骤1102的实现方式可参阅步骤902或者可替换步骤902的步骤。
1103、判断第一数据包的目的BAP地址是否匹配第二宿主节点为第一IAB节点分配的BAP地址且第一指示信息指示递交上层。
步骤1103可以是：判断第一数据包的目的BAP地址与第二宿主节点为第一IAB节点分配的BAP地址是否相同且第一指示信息指示递交上层。若第一数据包的目的BAP地址与第二宿主节点为第一IAB节点分配的BAP地址相同且第一指示信息指示递交上层，则执行步骤1104；否则，则执行步骤1105。第一指示信息包含于第一数据包。第一指示信息可指示将上述第一数据包递交给上述第一IAB节点的BAP层的上层或者不将上述第一数据包递交给上述第一IAB节点的BAP层的上层。在一些实施例中，第一指示信息可以包含于第一数据包所包含的路径标识。第一指示信息可以是在已有的路径标识上额外增加的指示信息(占用一个或多个比特)。举例来说，第一指示信息为在已有的路径标识上额外增加的两个比特；若该第一指示信息为00，则该第一指示信息指示不递交上层；若该第一指示信息为11，则该第一指示信息指示递交上层(即将第一数据包递交给上层)。在一些实施例中，第一指示信息可以用一个或者多个特殊的PathID(有10个bits大小)值来指示是否递交给上层。例如PathID＝31则交给上层，否则不递交上层。本申请中，IAB节点的BAP层的上层可以是指DU侧的IP层。IAB节点的MT侧的BAP层收到数据包了之后，判断是给自己的数据包，然后交给自己DU侧的IP层。
1104、第一IAB节点将第一数据包递交给第一IAB节点的BAP层的上层。
1105、第一IAB节点将第一数据包的第一BAP路由标识改写为第二BAP路由标识。
步骤1105的实现方式请参阅图9中的步骤903。
1106、判断第一数据包的目的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址。
步骤1106可以是：判断第一数据包的目的BAP地址与第一宿主节点为第一IAB节点分配的BAP地址是否相同。若是，则执行步骤1107；若否，则执行步骤1108。
1107、第一IAB节点将第一数据包递交给第一IAB节点的BAP层的上层。
1108、第一IAB节点根据路由表转发第一数据包。
步骤1108的实现方式请参阅图9中的步骤906。
本申请实施例中，通过判断第一数据包是否来自第二BAP拓扑，来确定是否改写第一数据包的BAP路由标识，以便将来自第二BAP拓扑的数据包通过路由表转发出去。在第一数据包来自第二BAP拓扑时，通过判断第一数据包的目标BAP地址是否匹配第二宿主节点为第一IAB节点分配的BAP地址以及第一指示信息是否指示递交上层，来决定是转发第一数据包还是将第一数据包递交给BAP层的上层；在第一数据包不是来自第二BAP拓扑时，通过判断第一数据包的目的BAP地址是否匹配第一宿主节点为第一IAB节点分配的BAP地址，来决定是转发第一数据包还是将第一数据包递交给BAP层的上层；将第一数据包路由至正确的传输路径，保证了IAB节点和UE数据的稳定传输。
前面描述了将下行数据包的路由至正确的传输路径的方案。下面结合附图介绍将上行数据包路由至正确的传输路径的方案。图12为本申请实施例提供的另一种路由方法流程图。图12中的方法可应用于IAB网络，上述IAB网络包括第一BAP拓扑和第二BAP拓扑，上述第一BAP拓扑由第一宿主节点管理，上述第二BAP拓扑由第二宿主节点管理，上述第一宿主节点与上述第二宿主节点不同。IAB网络中的任意边界节点均可采用图12中的方法流程转发上行数据包。在一些实施例中，IAB网络中的边界节点可执行图8至图11中的路由方法来转发下行数据包，也可以执行图12中的路由方法来转发上行数据包。如图12所示，该方法包括：
1201、第一IAB节点接收来自第一IAB节点的子节点的第二数据包。
上述第一IAB节点由上述第一宿主节点管理，上述第一IAB节点的至少一个父节点由上述第二宿主节点管理，上述第一IAB节点属于上述第一BAP拓扑。第一IAB节点为IAB网络中的边界节点。
1202、第一IAB节点在获得与第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识的情况下，根据第四BAP路由标识以及路由表，转发第二数据包。
在一些实施例中，第一IAB节点通过查找改写表来获得与第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识。例如，第一IAB节点查找改写表中与第三BAP路由标识存在映射关系的BAP路由标识，得到第四BAP路由标识。根据第四BAP路由标识以及路由表，转发第二数据包可以是：第一IAB节点根据上述路由表中与上述第四BAP路由标识相匹配的下一跳BAP地址，转发上述第二数据包。
步骤1202可替换为：第一IAB节点在未获得与上述第二数据包的第三BAP路由标识存在映射关系的BAP路由标识的情况下，根据上述第三BAP路由标识以及路由表，转发上述第二数据包。在一些实施例中，第一IAB节点通过查找改写表来获得与第二数据包的第三BAP路由标识存在映射关系的BAP路由标识；若改写表未包含与第三BAP路由标识存在映射关系的BAP路由标识，则根据第三BAP路由标识以及路由表，转发上述第二数据包。根据上述第三 BAP路由标识以及路由表，转发上述第二数据包可以是：第一IAB节点根据上述路由表中与上述第三BAP路由标识相匹配的下一跳BAP地址，转发上述第二数据包。
本申请实施例中，在获得与第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识的情况下，根据第四BAP路由标识以及路由表，转发第二数据包；能够将第二数据包路由至正确的传输路径。
图13为本申请实施例提供的另一种路由方法流程图。图13中的方法流程为图12中的方法流程的一种可能的实现方式。如图13所示，该方法包括：
1301、第一IAB节点接收来自第一IAB节点的子节点的第二数据包。
1302、判断第二数据包的第三BAP路由标识是否匹配改写表。
判断第二数据包的第三BAP路由标识是否匹配改写表可以是：判断改写表中是否包含与第二数据包的第三BAP路由标识存在映射关系的BAP路由标识。若是，则执行步骤1303；若否，则执行步骤1304。第一BAP路由标识包含第二数据包的目的BAP地址和路径标识。
在一些实施例中，步骤1302可替换为：判断第二数据包的第三BAP路由标识是否匹配第一BAP拓扑的路由表。若是，则执行步骤1304；若否，则执行步骤1303。
在一些实施例中，步骤1302可替换为：判断第二数据包的第三BAP地址是否属于第三BAP地址集合。若是，则执行步骤1303；若否，则执行步骤1304。在一些实施例中，第一宿主节点可提前给第一IAB节点配置第三BAP地址集合。可选的，第三BAP地址集合可以是或者必须包括第一宿主节点给第一IAB节点分配的BAP地址或者第一宿主节点给第二宿主节点分配的伪BAP地址。可选的，第三BAP地址集合中的所有BAP地址可提前配置在步骤1303中改写表的原始BAP路由标识一栏中。
在一些实施例中，步骤1302可替换为：判断第二数据包的第三BAP路径ID是否属于第三BAP路径ID集合。若是，则执行步骤1303；若否，则执行步骤1304。在一些实施例中，第一宿主节点可提前给第一IAB节点配置第三BAP路径ID集合。可选的，第三BAP路径ID集合可以是或者必须包括第一宿主节点分配的用于指示到第二宿主节点的BAP路径ID。可选的，第三BAP路径ID集合中的所有路径ID可提前配置在步骤1303中改写表的原始BAP路由标识一栏中。
1303、第一IAB节点将第二数据包的第三BAP路由标识改写为第四BAP路由标识。
步骤1303的实现方式请参阅步骤903。
1304、第一IAB节点根据路由表转发第二数据包。
在第三BAP路由标识匹配改写表情况下，步骤1304可以是：第一IAB节点根据上述路由表中与上述第四BAP路由标识相匹配的下一跳BAP地址，转发上述第二数据包。若路由表中找不到与第四BAP路由标识相匹配的下一跳BAP地址(entry)，判断第二数据包为错误包，丢弃该第二数据包。
在第三BAP路由标识不匹配改写表情况下，步骤1304可以是：第一IAB节点根据上述路由表中与上述第三BAP路由标识相匹配的下一跳BAP地址，转发上述第二数据包。若路由表中找不到与第三BAP路由标识相匹配的下一跳BAP地址(entry)，判断第二数据包为错误包，丢弃该第二数据包。
本申请实施例中，通过判断第二数据包的第三BAP路由标识是否匹配改写表来决定是否改写第二数据包的BAP路由标识，以便根据第二数据包的BAP路由标识转发第二数据包；能够将第二数据包路由至正确的传输路径。
图14示出了一种通信装置1400的结构示意图。该通信装置1400可以对应实现上述各个 方法实施例中由IAB节点(例如第一IAB节点)实现的功能或者步骤。该通信装置可以包括处理模块1410和收发模块1420。可选的，还可以包括存储单元，该存储单元可以用于存储指令(代码或者程序)和/或数据。处理模块1410和收发模块1420可以与该存储单元耦合，例如，处理模块1410可以读取存储单元中的指令(代码或者程序)和/或数据，以实现相应的方法。上述各个单元可以独立设置，也可以部分或者全部集成。例如收发模块1420可包括发送模块和接收模块。
在一些可能的实施方式中，通信装置1400能够对应实现上述方法实施例中第一IAB节点的行为和功能。例如通信装置1400可以为第一IAB节点，也可以为应用于第一IAB节点中的部件(例如芯片或者电路)。收发模块1420可以用于执行图8、图9、图10、图11、图12或图13的实施例中由第一IAB节点所执行的全部接收或发送操作，例如图8所示的实施例中的步骤901以及图9所示实施例中的步骤901和步骤906，和/或用于支持本文所描述的技术的其它过程。处理模块1410用于执行图8、图9、图10、图11、图12或图13所示的实施例中由第一IAB节点所执行的除了收发操作之外的全部操作。例如收发模块1420可以用于执行图8所示的实施例中的步骤802，和/或用于支持本文所描述的技术的其它过程。又例如收发模块1420可以用于执行图9所示的实施例中的步骤902、步骤903、步骤904以及步骤905。又例如收发模块1420可以用于执行图10所示的实施例中的步骤1002至步骤1007。又例如收发模块1420可以用于执行图11所示的实施例中的步骤1102至步骤1107。又例如收发模块1420可以用于执行图12所示的实施例中的步骤1201和步骤1202。又例如收发模块1420可以用于执行图13所示的实施例中的步骤1301和步骤1304。相关具体描述可以参考方法实施例。
在一些可能的实施方式中，通信装置1400能够对应实现上述方法实施例中第一宿主节点的行为和功能。例如通信装置1400可以为第一宿主节点，也可以为应用于第一宿主节点中的部件(例如芯片或者电路)。收发模块1420可以用于执行前述实施例中由第一宿主节点所执行的全部接收或发送操作，处理模块1410可以用于执行前述实施例中由第一宿主节点所执行的除了收发操作之外的全部操作。相关具体描述可以参考方法实施例。
图15为本申请实施例提供的通信装置1500的结构示意图。其中，通信装置1500可以是第一IAB节点，能够实现本申请实施例提供的方法中第一IAB节点的功能。或者，通信装置1500也可以是能够支持第一IAB节点实现本申请实施例提供的方法中对应的功能的装置。其中，该通信装置1500可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
在硬件实现上，上述收发模块1420可以为收发器，收发器集成在通信装置1500中构成通信接口1510。
通信装置1500包括至少一个处理器1520，用于实现或用于支持通信装置1500实现本申请实施例提供的方法中第一IAB节点的功能。具体参见方法示例中的详细描述，此处不做赘述。
通信装置1500还可以包括至少一个存储器1530，用于存储程序指令和/或数据。存储器1530和处理器1520耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器1520可能和存储器1530协同操作。处理器1520可能执行存储器1530中存储的程序指令和/或数据，以使得通信装置1500实现相应的方法。所述至少一个存储器中的至少一个可以包括于处理器中。
通信装置1500还可以包括通信接口1510，用于通过传输介质和其它设备进行通信，从 而用于通信装置1500中的装置可以和其它设备进行通信。示例性地，当该通信装置为第一IAB节点时，该其它设备为其他IAB节点。处理器1520可以利用通信接口1510收发数据。通信接口1510具体可以是收发器。
本申请实施例中不限定上述通信接口1510、处理器1520以及存储器1530之间的具体连接介质。本申请实施例在图15中以存储器1530、处理器1520以及通信接口1510之间通过总线1540连接，总线在图15中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图15中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在本申请实施例中，处理器1520可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器1530可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
应理解，通信装置1500为第一IAB节点时，图16示出了通信装置1500的另一种形式。图16中，通信装置1500是第一IAB节点，应理解，第一IAB节点包括CU和DU，CU可包括通信接口、处理器以及存储器，以及连接通信接口、处理器以及存储器的总线，其中通信接口可用于与IAB宿主节点的CU或IAB节点的DU进行通信。DU也可包括通信接口、处理器以及存储器，以及连接通信接口、处理器以及存储器的总线，其中通信接口用于与IAB节点的MT进行通信。
图17为本申请实施例提供的另一种通信装置170的结构示意图。如图17所示，图17所示的通信装置包括逻辑电路1701和接口1702。图14中的处理模块可以用逻辑电路1701实现，图14中的收发模块可以用接口1702实现。其中，该逻辑电路1701可以为芯片、处理电路、集成电路或片上系统(system on chip，SoC)芯片等，接口1702可以为通信接口、输入输出接口等。本申请实施例中，逻辑电路和接口还可以相互耦合。对于逻辑电路和接口的具体连接方式，本申请实施例不作限定。
在本申请的一些实施例中，该逻辑电路和接口可用于执行上述第一IAB节点执行的功能或操作等。
本申请实施例还提供一种通信系统，具体的，通信系统包括第一宿主节点、第二宿主节点、第一IAB节点、由该第一宿主节点控制的一个或多个IAB节点以及由第二宿主节点控制的一个或多个IAB节点。
本申请实施例中还提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行上述实施例的方法。
本申请实施例中还提供一种计算机程序产品，包括指令，当其在计算机上运行时，使得计算机执行上述实施例的方法。
本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于 实现前述方法中第一IAB节点的功能。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (21)

  1. 一种路由方法，其特征在于，所述路由方法应用于接入回传一体化IAB网络，所述IAB网络包括第一回传适配协议BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；所述方法包括：
    第一IAB节点接收第一数据包；所述第一IAB节点由所述第一宿主节点管理，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑；
    所述第一IAB节点根据接收所述第一数据包的入口链路所对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包。
  2. 根据权利要求1所述的路由方法，其特征在于，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：
    在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑不为所述第一BAP拓扑且未满足第一条件的情况下，所述第一IAB节点根据第二BAP路由标识和路由表转发所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第二BAP路由标识由改写所述第一数据包的第一BAP路由标识得到，所述第一BAP路由标识包含所述第一数据包的目的BAP地址和路径标识；
    所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；
    或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
  3. 根据权利要求2所述的路由方法，其特征在于，所述第一条件还包括：所述第一数据包包含的第一指示信息指示将所述第一数据包递交给所述第一IAB节点的BAP层的上层。
  4. 根据权利要求2或3所述的路由方法，其特征在于，所述第一IAB节点根据路由表转发所述第一数据包之前，所述方法还包括：
    所述第一IAB节点将所述第一数据包的所述第一BAP路由标识改写为所述第二BAP路由标识；
    所述第一IAB节点根据路由表转发所述第一数据包包括：
    所述第一IAB节点根据所述路由表中与所述第二BAP路由标识相匹配的下一跳BAP地址，转发所述第一数据包。
  5. 根据权利要求2所述的路由方法，其特征在于，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：
    在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑不为所述第一BAP拓扑且满足第一条件的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；
    所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；
    或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述 第二宿主节点为所述第一IAB节点分配的BAP地址。
  6. 根据权利要求5所述的路由方法，其特征在于，所述目标条件还包括：所述第一数据包包含的第一指示信息指示将所述第一数据包递交给所述第一IAB节点的BAP层的上层。
  7. 根据权利要求2所述的路由方法，其特征在于，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：
    在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑为所述第一BAP拓扑且第三BAP地址与第四BAP地址不匹配的情况下，所述第一IAB节点根据路由表转发所述第一数据包；
    所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
  8. 根据权利要求2所述的路由方法，其特征在于，所述第一IAB节点根据接收所述第一数据包的入口链路对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包包括：
    在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑为所述第一BAP拓扑且第三BAP地址与第四BAP地址相匹配的情况下，所述第一IAB节点向所述第一IAB节点的BAP层的上层递交所述第一数据包；
    所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
  9. 一种路由方法，其特征在于，所述路由方法应用于接入回传一体化IAB网络，所述IAB网络包括第一回传适配协议BAP拓扑和第二BAP拓扑，所述第一BAP拓扑由第一宿主节点管理，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同；所述方法包括：
    所述第一IAB节点接收来自所述第一IAB节点的子节点的第二数据包；所述第一IAB节点由所述第一宿主节点管理，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点属于所述第一BAP拓扑；
    所述第一IAB节点在获得与所述第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识的情况下，根据所述第四BAP路由标识以及路由表，转发所述第二数据包。
  10. 根据权利要求9所述的路由方法，其特征在于，所述方法还包括：
    所述第一IAB节点在未获得与所述第二数据包的第三BAP路由标识存在映射关系的BAP路由标识的情况下，根据所述第三BAP路由标识以及路由表，转发所述第二数据包。
  11. 一种通信装置，其特征在于，所述通信装置为IAB网络中的第一IAB节点，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点由所述第一宿主节点管理；所述通信装置包括：
    收发模块，用于接收第一数据包；
    处理模块，用于根据接收所述第一数据包的入口链路所对应的BAP拓扑以及所述第一IAB节点所属的BAP拓扑，处理所述第一数据包。
  12. 根据权利要求11所述的通信装置，其特征在于，
    所述处理模块，具体用于在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑不为所述第一BAP拓扑且未满足第一条件的情况下，根据第二BAP路由标识和路由 表，控制所述收发模块转发所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；所述第二BAP路由标识由改写所述第一数据包的第一BAP路由标识得到，所述第一BAP路由标识包含所述第一数据包的目的BAP地址和路径标识；
    所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；
    或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
  13. 根据权利要求12所述的通信装置，其特征在于，所述第一条件还包括：所述第一数据包包含的第一指示信息指示将所述第一数据包递交给所述第一IAB节点的BAP层的上层。
  14. 根据权利要求12或13所述的通信装置，其特征在于，
    所述处理模块，还用于将所述第一数据包的所述第一BAP路由标识改写为所述第二BAP路由标识；
    所述处理模块，具体用于根据所述路由表中与所述第二BAP路由标识相匹配的下一跳BAP地址，控制所述收发模块转发所述第一数据包。
  15. 根据权利要求12所述的通信装置，其特征在于，
    所述处理模块，具体用于在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑不为所述第一BAP拓扑且满足第一条件的情况下，向所述第一IAB节点的BAP层的上层递交所述第一数据包；所述第一条件包括：第一BAP地址与第二BAP地址相匹配；
    所述第一BAP地址由改写所述第一数据包的目的BAP地址得到，所述第二BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址；
    或者，所述第一BAP地址为所述第一数据包的目的BAP地址，所述第二BAP地址是所述第二宿主节点为所述第一IAB节点分配的BAP地址。
  16. 根据权利要求15所述的通信装置，其特征在于，所述目标条件还包括：所述第一数据包包含的第一指示信息指示将所述第一数据包递交给所述第一IAB节点的BAP层的上层。
  17. 根据权利要求12所述的通信装置，其特征在于，
    所述处理模块，具体用于在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑为所述第一BAP拓扑且第三BAP地址与第四BAP地址不匹配的情况下，根据路由表控制所述收发模块转发所述第一数据包；
    所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
  18. 根据权利要求12所述的通信装置，其特征在于，
    所述处理模块，具体用于在所述第一IAB节点接收所述第一数据包的入口链路所对应的BAP拓扑为所述第一BAP拓扑且第三BAP地址与第四BAP地址相匹配的情况下，向所述第一IAB节点的BAP层的上层递交所述第一数据包；
    所述第三BAP地址为所述第一数据包的目的BAP地址，所述第四BAP地址是所述第一宿主节点为所述第一IAB节点分配的BAP地址。
  19. 一种通信装置，其特征在于，所述通信装置为IAB网络中的第一IAB节点，所述IAB网络包括第一BAP拓扑和第二BAP拓扑，所述第二BAP拓扑由第二宿主节点管理，所述第一宿主节点与所述第二宿主节点不同，所述第一IAB节点的至少一个父节点由所述第二宿主节点管理，所述第一IAB节点由所述第一宿主节点管理；所述通信装置包括：
    收发模块，用于接收来自所述第一IAB节点的子节点的第二数据包；
    处理模块，用于在获得与所述第二数据包的第三BAP路由标识存在映射关系的第四BAP路由标识的情况下，根据所述第四BAP路由标识以及路由表，控制所述收发模块转发所述第二数据包。
  20. 根据权利要求19所述的通信装置，其特征在于，
    所述处理模块，还用于在未获得与所述第二数据包的第三BAP路由标识存在映射关系的BAP路由标识的情况下，根据所述第三BAP路由标识以及路由表，控制所述收发模块转发所述第二数据包。
  21. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，所述计算机程序包括程序指令，所述程序指令当被处理器执行时，使所述处理器执行权利要求1至10任意一项所述的方法。
PCT/CN2022/104743 2021-08-04 2022-07-08 路由方法和通信装置 WO2023011111A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2022321398A AU2022321398A1 (en) 2021-08-04 2022-07-08 Routing method and communication apparatus
JP2024506744A JP2024528223A (ja) 2021-08-04 2022-07-08 ルーティング方法及び通信装置
EP22851825.4A EP4369792A4 (en) 2021-08-04 2022-07-08 ROUTING METHOD AND COMMUNICATION DEVICE
US18/431,714 US20240179610A1 (en) 2021-08-04 2024-02-02 Routing method and communication apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202110891824 2021-08-04
CN202110891824.2 2021-08-04
CN202111101156.5 2021-09-18
CN202111101156.5A CN115915330A (zh) 2021-08-04 2021-09-18 路由方法和通信装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/431,714 Continuation US20240179610A1 (en) 2021-08-04 2024-02-02 Routing method and communication apparatus

Publications (1)

Publication Number Publication Date
WO2023011111A1 true WO2023011111A1 (zh) 2023-02-09

Family

ID=85155103

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/104743 WO2023011111A1 (zh) 2021-08-04 2022-07-08 路由方法和通信装置

Country Status (6)

Country Link
US (1) US20240179610A1 (zh)
EP (1) EP4369792A4 (zh)
JP (1) JP2024528223A (zh)
AU (1) AU2022321398A1 (zh)
TW (1) TWI827186B (zh)
WO (1) WO2023011111A1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111093211A (zh) * 2019-11-07 2020-05-01 中兴通讯股份有限公司 一种控制信令传输方法、装置和存储介质
WO2020090988A1 (en) * 2018-10-31 2020-05-07 Sharp Kabushiki Kaisha Methods and apparatus for using conditional handovers for wireless backhaul
CN112399519A (zh) * 2019-08-15 2021-02-23 华为技术有限公司 一种路由方法及装置
CN113056946A (zh) * 2018-10-31 2021-06-29 夏普株式会社 用于在无线回程中使用冗余链路的方法和设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020090988A1 (en) * 2018-10-31 2020-05-07 Sharp Kabushiki Kaisha Methods and apparatus for using conditional handovers for wireless backhaul
CN113056946A (zh) * 2018-10-31 2021-06-29 夏普株式会社 用于在无线回程中使用冗余链路的方法和设备
CN112399519A (zh) * 2019-08-15 2021-02-23 华为技术有限公司 一种路由方法及装置
CN111093211A (zh) * 2019-11-07 2020-05-01 中兴通讯股份有限公司 一种控制信令传输方法、装置和存储介质

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
QUALCOMM INCORPORATED: "Inter-topology BAP routing", 3GPP DRAFT; R2-2104859, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. E-meeting; 20210517 - 20210528, 10 May 2021 (2021-05-10), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052003745 *
QUALCOMM INCORPORATED: "Report [Post113-e][058][IAB17] Inter-donor topology adaptation", 3GPP DRAFT; R2-2103083, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. electronic; 20210412 - 20210420, 2 April 2021 (2021-04-02), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052174595 *
SAMSUNG: "Topology adaptation enhancements", 3GPP DRAFT; R2-2105782, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. E-meeting; 20210519 - 20210527, 10 May 2021 (2021-05-10), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052003954 *
See also references of EP4369792A4

Also Published As

Publication number Publication date
EP4369792A4 (en) 2024-10-16
US20240179610A1 (en) 2024-05-30
AU2022321398A1 (en) 2024-02-22
JP2024528223A (ja) 2024-07-26
TWI827186B (zh) 2023-12-21
TW202315364A (zh) 2023-04-01
EP4369792A1 (en) 2024-05-15

Similar Documents

Publication Publication Date Title
US11510131B2 (en) Configuration method, data transmission method, and apparatus
JP7440562B2 (ja) 情報伝送方法及び装置
US11483058B2 (en) Communication method, communications node, and system
JP7116193B2 (ja) 情報伝送方法および装置
WO2020164615A1 (zh) 一种通信方法及相关设备
JP7516578B2 (ja) Ｉａｂネットワーク通信方法及び関連デバイス
WO2022082679A1 (zh) 一种通信方法及相关设备
CN110365609B (zh) 一种数据包分段方法、及装置
WO2021134723A1 (zh) 通信方法、设备及系统
WO2023130989A1 (zh) 一种通信方法及装置
EP4266754A1 (en) Communication method and communication apparatus
WO2023011111A1 (zh) 路由方法和通信装置
WO2024140723A1 (zh) 一种通信方法及装置
EP4300863A1 (en) Communication method and communication device
WO2022067781A1 (zh) 一种通信方法及相关设备
EP4443977A1 (en) Communication method and communication apparatus
WO2022068164A1 (zh) 一种通信方法及相关设备
WO2023130260A1 (zh) Rrc消息的配置方法、装置和系统
WO2024207363A1 (zh) 信号的收发方法、装置和通信系统
CN115915330A (zh) 路由方法和通信装置
JP2024513004A (ja) 情報送受信方法、データ送信方法及び装置
TW202439853A (zh) 通信方法及相關裝置
CN118140587A (zh) 无线路由方法及装置

Legal Events

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

Ref document number: 22851825

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2024506744

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: AU2022321398

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2022851825

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 202437010204

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 2022851825

Country of ref document: EP

Effective date: 20240209

ENP Entry into the national phase

Ref document number: 2022321398

Country of ref document: AU

Date of ref document: 20220708

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE