Routing, rerouting, and routing configuration methods, iab node, and cu node

Abstract

The application discloses a routing selection, re-routing and routing configuration method, a self-backhaul IAB node and a centralized unit CU node, and belongs to the technical field of communication. The routing selection method of the embodiment of the application comprises the following steps: a first IAB node acquires a listen before talk (LBT) result; and the first IAB node determines backhaul adaptation protocol (BAP) routing selection of data forwarding according to the LBT result.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a routing selection, re-routing and routing configuration method, an integrated access and backhaul (IAB) node, a centralized unit (CU) node and a network side device. BACKGROUND

[0002] In the related art, a transmitting / forwarding IAB node in an IAB network can have two or more optional next hop IAB nodes through dual connectivity, and when the IAB network operates in a licensed frequency band, the transmitting / forwarding IAB node can select a next hop IAB node with better link communication quality to transmit or forward data.

[0003] However, when the IAB network operates in an unlicensed frequency band and performs listen before talk (LBT), at this time, there can be a situation that LBT fails or has a high LBT failure probability on a target backhaul path, and LBT succeeds or has a low failure probability on an alternative backhaul path. In this case, reselecting the backhaul path is not allowed, causing the transmitting / forwarding node to wait for subsequent LBT success on the target backhaul path before data transmission, thereby increasing transmission delay. SUMMARY

[0004] Embodiments of the present application provide a routing selection, re-routing and routing configuration method, an IAB node and a CU node, which can solve the problem of increased transmission delay caused by not allowing reselection of a backhaul path when an IAB network operates in an unlicensed frequency band.

[0005] In a first aspect, a routing selection method is provided, which includes:

[0006] A first IAB node acquires an LBT result.

[0007] The first IAB node determines a backhaul adaptation protocol (BAP) routing selection for data forwarding according to the LBT result.

[0008] In a second aspect, a routing selection apparatus is provided for a first IAB node, which includes:

[0009] A first acquisition module is configured to acquire an LBT result.

[0010] A first determination module is configured to determine a BAP routing selection for data forwarding according to the LBT result.

[0011] In a third aspect, a method for rerouting is provided, and the method comprises:

[0012] The third IAB node acquires first indication information, wherein the first indication information is used for indicating an LBT result or indicating that the third IAB node performs rerouting;

[0013] The third IAB node performs rerouting according to the first indication information.

[0014] In a fourth aspect, a rerouting apparatus is provided for a third IAB node, and the rerouting apparatus comprises:

[0015] A second acquisition module is configured to acquire first indication information, wherein the first indication information is used for indicating an LBT result or indicating that the third IAB node performs rerouting;

[0016] A rerouting module is configured to perform rerouting according to the first indication information.

[0017] In a fifth aspect, a method for configuring routing is provided, and the method comprises:

[0018] A first target IAB node receives target configuration information from a CU node, wherein the target configuration information is determined according to an LBT result related to a target backhaul path acquired by the CU node, and the target configuration information is used for configuring BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path comprises the first target IAB node.

[0019] In a sixth aspect, a routing configuration apparatus is provided for a first target IAB node, and the routing configuration apparatus comprises:

[0020] A third receiving module is configured to receive target configuration information from a CU node, wherein the target configuration information is determined according to an LBT result related to a target backhaul path acquired by the CU node, and the target configuration information is used for configuring BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path comprises the first target IAB node.

[0021] In a seventh aspect, a method for configuring routing is provided, and the method comprises:

[0022] A CU node receives an LBT result related to a target backhaul path from an IAB node in the target backhaul path;

[0023] The CU node sends target configuration information to a first target IAB node according to the LBT result related to the target backhaul path, wherein the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0024] In an eighth aspect, a routing configuration apparatus is provided for a CU node, the routing configuration apparatus comprising:

[0025] A fourth receiving module is configured to receive, from an IAB node in a target backhaul path, an LBT result related to the target backhaul path.

[0026] A third sending module is configured to send, to a first target IAB node, target configuration information according to the LBT result related to the target backhaul path, wherein the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0027] In a ninth aspect, a first IAB node is provided, which comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method of the first aspect.

[0028] In a tenth aspect, a first IAB node is provided, which comprises a processor and a communication interface, wherein the communication interface is configured to obtain an LBT result, and the processor is configured to determine BAP routing selection of data forwarding according to the LBT result.

[0029] In an eleventh aspect, a third IAB node is provided, which comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method of the third aspect.

[0030] In a twelfth aspect, a third IAB node is provided, which comprises a processor and a communication interface, wherein the communication interface is configured to obtain first indication information, wherein the first indication information is used to indicate an LBT result or to instruct the third IAB node to perform rerouting, and the processor is configured to perform rerouting according to the first indication information.

[0031] In a thirteenth aspect, a first target IAB node is provided, which comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method of the fifth aspect.

[0032] In a fourteenth aspect, a first target IAB node is provided, comprising a processor and a communication interface, wherein the communication interface is configured to receive target configuration information from a CU node, wherein the target configuration information is determined according to LBT results of a target backhaul path obtained by the CU node, and the target configuration information is used to configure BAP routing for data forwarding of the first target IAB node, and the target backhaul path comprises the first target IAB node.

[0033] In a fifteenth aspect, a CU node is provided, comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method according to the seventh aspect.

[0034] In a sixteenth aspect, a CU node is provided, comprising a processor and a communication interface, wherein the communication interface is configured to receive LBT results of a target backhaul path from an IAB node in the target backhaul path, and the communication interface is further configured to send target configuration information to a first target IAB node according to the LBT results of the target backhaul path, wherein the target configuration information is used to configure BAP routing for data forwarding of the first target IAB node, and the target backhaul path comprises the first target IAB node.

[0035] In a seventeenth aspect, a readable storage medium is provided, and the readable storage medium stores a program or instructions, and the program or instructions, when executed by a processor, implement the steps of the method according to the first aspect, or implement the steps of the method according to the third aspect, or implement the steps of the method according to the fifth aspect, or implement the steps of the method according to the seventh aspect.

[0036] In an eighteenth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is configured to run a program or instructions to implement the method according to the first aspect, or implement the method according to the third aspect, or implement the method according to the fifth aspect, or implement the method according to the seventh aspect.

[0037] In a nineteenth aspect, a computer program / program product is provided, and the computer program / program product is stored in a non-volatile storage medium, and the program / program product is executed by at least one processor to implement the steps of the routing method according to the first aspect, or implement the steps of the re-routing method according to the third aspect, or implement the steps of the routing configuration method according to the fifth aspect, or implement the steps of the routing configuration method according to the seventh aspect.

[0038] In the embodiments of the present application, the first IAB node acquires the LBT result, and determines the BAP routing selection of data forwarding according to the LBT result. In this way, even if the IAB network operates in an unlicensed frequency band, it can be determined according to the LBT result whether there is a case of LBT failure or a high probability of LBT failure on the target backhaul path and / or the alternative backhaul path, and the target backhaul path and the alternative backhaul path are selected according to the LBT result, and the backhaul path with LBT success or a low probability of LBT failure is selected as the backhaul path for data transmission, which can reduce the transmission delay. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1a is a structure diagram of an IAB network to which the present application can be applied;

[0040] Figure 1b is a structure diagram of a terminal function module (Mobile Termination, MT) - Distributed Unit (Distributed Unit, DU) of an IAB system;

[0041] Figure 2 is a flowchart of a routing selection method provided by the embodiments of the present application;

[0042] Figure 3a is one of the schematic diagrams of the re-routing process;

[0043] Figure 3b is the second schematic diagram of the re-routing process;

[0044] Figure 3c is the third schematic diagram of the re-routing process;

[0045] Figure 4a is one of the schematic diagrams of the re-routing process based on spatial directionality;

[0046] Figure 4b is the second schematic diagram of the re-routing process based on spatial directionality;

[0047] Figure 5 is a flowchart of a re-routing method provided by the embodiments of the present application;

[0048] Figure 6 is a flowchart of a routing configuration method provided by the embodiments of the present application;

[0049] Figure 7 is a flowchart of another routing configuration method provided by the embodiments of the present application;

[0050] Figure 8 is a structure diagram of a routing selection device provided by the embodiments of the present application;

[0051] Figure 9is a structural diagram of a routing device provided by an embodiment of the present application;

[0052] Figure 10 is a structural diagram of a routing configuration device provided by an embodiment of the present application;

[0053] Figure 11 is a structural diagram of another routing configuration device provided by an embodiment of the present application;

[0054] Figure 12 is a structural diagram of a network-side device provided by an embodiment of the present application;

[0055] Figure 13 is a structural diagram of another network-side device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0057] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0058] The IAB system is a technology being standardized in New Radio (NR) Rel-16, and by introducing the IAB system, the situation that the wired transmission network is not deployed in place when the access points are densely deployed can be solved. That is, when there is no wired transmission network, the access point can rely on the wireless network for data backhaul. The first IAB node performing the routing selection method provided by the embodiments of the present application can be any IAB node in the IAB system.

[0059] When NR operates in unlicensed frequency, before transmitting in a certain channel, the transmitter (UE or gNB) should detect the channel according to the procedure of LBT to determine whether the channel is available. The specific method is: the transmitter measures the received power on the channel, if the received power is higher than a preset value (the preset value is used to determine whether it is in an occupied state), then the channel will be determined as an occupied state. Otherwise, the channel will be determined as an unoccupied state.

[0060] In the related art, when NR operates in unlicensed frequency, if the target channel is occupied, it needs to wait until the service on the channel is completed, so that the LBT on the channel is successful, and then data backhaul can be performed, that is, at this time, even if the channel on the alternative path is not occupied, it will not switch to the alternative path to perform data backhaul, thereby increasing the data transmission delay, and also causing the resources on the alternative path to be wasted; in the routing method provided in the present application, when NR operates in unlicensed frequency, if the target channel is occupied, it can be switched to the alternative backhaul path where the channel is not occupied, so that the latency of data backhaul can be shortened, and the utilization of resources can be improved.

[0061] Figure 1a A block diagram of an IAB system to which embodiments of the present application can be applied is shown. As shown in Figure 1a , an IAB system can include: an access IAB node 11 (i.e. Access IAB node), a forwarding IAB node 12 (i.e. Intermediate IAB node), and a host IAB node 13 (i.e. Donor IAB node), wherein the host IAB node 13 can be connected with a wired transmission network.

[0062] As shown in Figure 1a and 1b , except for the host IAB node 13, other IAB nodes can include a DU and a MT. By means of the MT, an access point (i.e. IAB node) can find an upstream access point (i.e. parent IAB node) and establish a wireless connection with the DU of the upstream access point, which is called a backhaul link. After an IAB node establishes a complete backhaul link, the IAB node opens its DU function, and the DU provides cell service, i.e. the DU can provide access service for the terminal 14. A self-backhaul loop includes a donor IAB node, which is connected with other network side devices through wired connection.

[0063] The terminal 14 can also be referred to as a terminal device or a user terminal (UE), which can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a palm computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), a wearable device, or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), etc. The wearable device includes a smart watch, a bracelet, a headset, glasses, etc., which are not specifically limited herein.

[0064] In addition, as shown in FIG. 1, in one self-backhaul loop, the DUs of all IAB nodes are connected to one CU node, and the DUs are configured by the one node through the F1-AP protocol. The CU configures the MT through the radio resource control (RRC) protocol. Figure 1b

[0065] The BAP protocol layer is a protocol layer specific to the IAB system. Each BAP entity in each IAB node has an address, which is referred to as a BAP address. In combination with the path identifier (PATH ID) allocated by the IAB-donor-CU, the BAP address can be used to route data.

[0066] In applications, the BAP protocol layer provides some functions as follows.

[0067] 1. Routing function 1: sending data packets from the CU node to the UE through the backhaul path or sending data packets from the UE to the CU node through the backhaul path;

[0068] 2. Routing function 2: the BAP protocol also provides a routing function of F1-AP information, sending F1 control information from the CU node to the IAB-DU through the backhaul path or sending F1 control information from the IAB-DU to the CU node through the backhaul path;

[0069] 3. Transmission function of quality of service (QoS) control information: the BAP protocol layer defines some BAP control protocol data units (PDUs) used in the IAB network, which are used for flow control, notification of backhaul radio link failure, etc.

[0070] ​A BAP data PDU includes a BAP header, and the BAP header includes a BAP routing ID, which includes a BAP address of a target IAB node (in downlink transmission, the target IAB node is an access IAB node; in uplink transmission, the target IAB node is a donor-DU node) and a path to the target IAB node. An IAB node determines a next-hop receiving IAB node (which can be any one of an intermediate IAB node, a donor-DU and an access IAB node) according to the PATH ID.

[0071] The routing method provided by the embodiments of the present application is used to select one of a target backhaul path and an alternative backhaul path with a higher LBT success probability as a BAP routing for data forwarding according to an LBT result, so that when a wireless link failure or congestion occurs in the current backhaul path, data can be allowed to be forwarded to a next-hop forwarding IAB node on the alternative path that can reach the target IAB node, and the data is transmitted to the destination IAB node, CU or UE by the next-hop forwarding IAB node, which can shorten the delay of data transmission and improve resource utilization.

[0072] The routing method provided by the embodiments of the present application will be described in detail in combination with some embodiments and application scenarios thereof and with reference to the accompanying drawings.

[0073] Please refer to Figure 2 is a flowchart of a routing method provided by the embodiments of the present application, and the execution subject of the routing method can be a first IAB node, as Figure 2 indicated, the routing method can include the following steps:

[0074] Step 201: The first IAB node acquires an LBT result.

[0075] In a specific implementation, the above-mentioned first IAB node can be any IAB node in an IAB system except for a destination IAB node, for example: a sending IAB node, a forwarding IAB node, or a sending / forwarding IAB node with at least two alternative next-hop IAB nodes.

[0076] As an optional implementation, the first IAB node acquires the LBT result, including at least one of the following:

[0077] The first IAB node receives an LBT result sent by a second IAB node, wherein the second IAB node is a parent IAB node, a host IAB node or a child IAB node of the first IAB node in a target backhaul path;

[0078] The first IAB node performs LBT to obtain an LBT result.

[0079] The first IAB node receives the LBT result sent by the CU node.

[0080] In the first embodiment, the LBT result of a certain IAB node can be passed to other IAB nodes in the same backhaul path.

[0081] In actual application, some IAB nodes in the same backhaul path only have one next-hop IAB node, while other IAB nodes can have multiple optional next-hop IAB nodes. At this time, the IAB node with multiple optional next-hop IAB nodes can obtain the LBT result of other IAB nodes to determine which next-hop IAB node to select according to the obtained LBT result.

[0082] In specific implementation, the second IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node in the target backhaul path, which can include: the first IAB node is a previous-hop IAB node of the second IAB node in the target backhaul path, or the first IAB node is a high-rise parent IAB node of a next-hop IAB node of the second IAB node in the target backhaul path, or the second IAB node is a donor IAB node.

[0083] Wherein, the previous-hop IAB node of the first IAB node can be represented as: a child IAB node of the first IAB node in uplink transmission, or a parent IAB node or a donor IAB node of the first IAB node in downlink transmission; correspondingly, the next-hop IAB node of the first IAB node can be represented as: a parent IAB node or a donor IAB node of the first IAB node in uplink transmission, or a child IAB node of the first IAB node in downlink transmission. For the convenience of explanation, the following embodiments of the present application are explained and described by taking downlink transmission as an example.

[0084] Wherein, the target backhaul path can include: a preferred uplink backhaul path and / or a preferred downlink backhaul path, in specific implementation, the LBT result received by the first IAB node from the second IAB node can include: the LBT result of the second IAB node to the next-hop IAB node in the alternative backhaul path, which represents the data transmission path that can be used when the preferred uplink backhaul path and / or the preferred downlink backhaul path is unavailable or congested, in actual application, the CU can configure the uplink or downlink (UL / DL) target backhaul path and the UL / DL alternative backhaul path according to the radio bearer of the UE.

[0085] For example, as Figure 3aAs shown in FIG. 1, in the process of downlink transmission of UE1 by donor IAB node adopting the path of DU1→IAB1→IAB5, the donor IAB node can obtain the LBT results of IAB1 and IAB2. If the LBT result of IAB1 is LBT failure and the LBT result of IAB2 is LBT success, the donor IAB node can determine that the path of DU1→IAB2→IAB5 needs to be selected for downlink transmission of UE1. That is, the rerouting between the same access IAB node and the unified donor IAB-DU is performed.

[0086] For another example, as shown in FIG. 2, in the process of downlink transmission of UE3 by donor IAB node adopting the path of DU1→IAB1→IAB5, the alternative backhaul path includes DU1→IAB2→IAB5 and DU1→IAB2→IAB6. At this time, the donor IAB node can obtain the LBT results of IAB1 to IAB5, the LBT results of IAB2 to IAB5 and the LBT results of IAB2 to IAB6. When the LBT result of IAB1 is LBT failure and the LBT results of IAB2 to IAB6 are LBT success, the donor IAB node can determine that the path of DU1→IAB2→IAB6 needs to be selected for downlink transmission of UE3. That is, the rerouting between the same donor IAB node and different access IAB nodes is performed. Figure 3b For another example, as shown in FIG. 2, in the process of downlink transmission of UE3 by donor IAB node adopting the path of DU1→IAB1→IAB5, the alternative backhaul path includes DU1→IAB2→IAB5 and DU1→IAB2→IAB6. At this time, the donor IAB node can obtain the LBT results of IAB1 to IAB5, the LBT results of IAB2 to IAB5 and the LBT results of IAB2 to IAB6. When the LBT result of IAB1 is LBT failure and the LBT results of IAB2 to IAB6 are LBT success, the donor IAB node can determine that the path of DU1→IAB2→IAB6 needs to be selected for downlink transmission of UE3. That is, the rerouting between the same donor IAB node and different access IAB nodes is performed.

[0087] Figure 3c For another example, as shown in FIG. 2, in the process of downlink transmission of UE3 by donor IAB node adopting the path of DU1→IAB1→IAB5, the alternative backhaul path includes DU1→IAB2→IAB5 and DU1→IAB2→IAB6. At this time, the donor IAB node can obtain the LBT results of IAB1 to IAB5, the LBT results of IAB2 to IAB5 and the LBT results of IAB2 to IAB6. When the LBT result of IAB1 is LBT failure and the LBT results of IAB2 to IAB6 are LBT success, the donor IAB node can determine that the path of DU1→IAB2→IAB6 needs to be selected for downlink transmission of UE3. That is, the rerouting between the same donor IAB node and different access IAB nodes is performed.

[0088] In the embodiment, the first IAB node receives the LBT result sent by the second IAB node to determine the BAP routing selection of data forwarding, which can be concentrated in some or one IAB node to reduce the complexity of other IAB nodes.

[0089] In the second embodiment, the LBT can be initiated by the sending or forwarding IAB node in the backhaul path to obtain the LBT result of the IAB node.

[0090] ​In this embodiment, if the LBT result detected by the IAB node is LBT failure, the IAB node can determine that another backhaul path needs to be selected; correspondingly, if the LBT result detected by all IAB nodes in the backhaul path is LBT success, it can be determined that no other backhaul path needs to be selected.

[0091] In a third implementation, the LBT result detected by the IAB node can be transmitted to the CU node, and the LBT result of each IAB node in the backhaul path is counted by the CU node, and the counted LBT result is forwarded to one or more IAB nodes.

[0092] In a specific implementation, the LBT performed by the first IAB node can include at least one of the following:

[0093] Omnidirectional LBT: that is, the transmitting IAB node omni-directionally listens to the target channel when performing the LBT procedure, and compares the received power on the target channel with the energy detection threshold to determine whether the channel is occupied, and determines whether the target channel is available at the end of the LBT procedure;

[0094] Directional LBT: the transmitting IAB node listens to the target channel in the target transmission direction when performing the LBT procedure, and compares the received power in the target transmission direction on the target channel with the energy detection threshold to determine whether the channel is occupied, and determines whether the target channel is available in the target transmission direction at the end of the LBT procedure; wherein the same channel can be available in one direction and unavailable in another direction.

[0095] Thus, for directional LBT, the first IAB node performs LBT to obtain an LBT result, including:

[0096] The first IAB node performs LBT in the target spatial direction to obtain the LBT result of the target spatial direction;

[0097] The first IAB node performs LBT in the alternative spatial direction to obtain the LBT result of the alternative spatial direction;

[0098] Wherein, the target spatial direction and the alternative spatial direction correspond to beams in different paths, or the target spatial direction and the alternative spatial direction correspond to different beams in the same path.

[0099] In specific implementation, the beams in different paths corresponding to the target spatial direction and the alternative spatial direction can be understood as follows: the beam corresponding to the target spatial direction is the beam in the target backhaul path, and the beam corresponding to the alternative spatial direction is the beam in the alternative backhaul path.

[0100] At this time, the first IAB node determines the BAP route selection for data forwarding based on the LBT result, including:

[0101] If the first IAB node succeeds in LBT in the target space direction or the failure rate of LBT in the target space direction is lower than a first ratio threshold, it selects to use the target backhaul path corresponding to the target space direction to send data.

[0102] If the first IAB node fails LBT in the target spatial direction or the failure rate of LBT in the target spatial direction is greater than or equal to the first ratio threshold, and the first IAB node succeeds LBT in the alternative spatial direction or the failure rate of LBT in the alternative spatial direction is lower than the second ratio threshold, then the alternative spatial direction is selected to be used to send data.

[0103] The first and second proportional thresholds mentioned above may be the same or different, and can be adjusted according to actual application scenarios and business needs, without specific limitations here.

[0104] For example: Figure 4a As shown, assuming the target backhaul path is IAB1→IAB2→CU, and the alternative backhaul path is IAB1→IAB3→CU, then IAB1 can perform directional LBT detection on the beam in the target spatial direction corresponding to IAB1→IAB2, and perform directional LBT detection on the beam in the alternative spatial direction corresponding to IAB1→IAB3. Thus, if the LBT success rate or failure rate in the target spatial direction is below a threshold, the target backhaul path can be used for data transmission or forwarding; if the LBT failure rate in the target spatial direction is above a threshold, but the LBT success rate or failure rate in the alternative spatial direction is below a threshold, the alternative backhaul path can be used for data transmission or forwarding.

[0105] In this embodiment, the sending / forwarding IAB node can perform LBT separately or simultaneously in the direction of the next-hop IAB node of the target backhaul path (i.e., the target space direction) and the direction of the next-hop IAB node of the alternative backhaul path (i.e., the alternative space direction), so as to select the backhaul path for data transmission or forwarding, thereby improving the directionality of data backhaul.

[0106] Furthermore, the fact that the target spatial direction and the alternative spatial direction correspond to different beams in the same path can be understood as: the beam corresponding to the target spatial direction and the beam corresponding to the alternative spatial direction are different beams in the target backhaul path or the alternative backhaul path, respectively.

[0107] Assume that the target spatial direction is the spatial direction corresponding to the target beam, and the alternative spatial direction is the spatial direction corresponding to the alternative beam, and that the target beam and the alternative beam are different beams in the same backhaul path.

[0108] The first IAB node then determines the BAP route selection for data forwarding based on the LBT result, including:

[0109] If the first IAB node successfully transmits data using the target beam corresponding to the target spatial direction or if the failure rate of the LBT in the target spatial direction is lower than a first ratio threshold, the first IAB node shall select to transmit data using the target beam corresponding to the target spatial direction.

[0110] If the first IAB node fails LBT in the target spatial direction or the failure rate of LBT in the target spatial direction is greater than or equal to the first ratio threshold, and the first IAB node succeeds LBT in the alternative spatial direction or the failure rate of LBT in the alternative spatial direction is lower than the second ratio threshold, then the alternative beam corresponding to the alternative spatial direction is selected to transmit data.

[0111] For example: Figure 4b As shown, assuming a certain backhaul path is: IAB1→IAB2→CU, and the channel between IAB1 and IAB2 includes two beams in different directions; then IAB1 can perform directional LBT detection on the beams in the target spatial direction and the alternative spatial direction between IAB1 and IAB2 respectively. Thus, if the LBT in the target beam direction is successful or the failure rate is below a threshold, the target beam can be used for data transmission or forwarding; if the LBT in the target beam direction fails or the failure rate is above a threshold, but the LBT in the alternative beam direction is successful, the alternative beam can be used for data transmission or forwarding.

[0112] In practice, in order to distinguish the beams and their return paths corresponding to the target spatial direction and the alternative spatial direction, the LBT result may further include at least one of the beam parameters of the target spatial direction and the beam parameters of the alternative spatial direction.

[0113] The beam parameter can include a beam identifier, which includes at least one of a synchronization signal and PBCH block (SSB) beam index, a channel state information-reference signal (CSI-RS) beam index, or a sounding reference signal (SRS) beam index, but is not limited to these.

[0114] The beam parameter can also include a node identifier of a starting IAB node, a target IAB node, and an intermediate IAB node in a backhaul path, so as to select a required backhaul path.

[0115] In this embodiment, different directional beams can be selected from the same path for data transmission according to directional LBT, which can also improve the directionality of data transmission.

[0116] In step 202, the first IAB node determines a BAP routing for data forwarding according to the LBT result.

[0117] In a specific implementation, determining the BAP routing for data forwarding according to the LBT result can include determining a backhaul path to be selected for data backhaul according to the LBT result. For example, when the LBT result indicates that a target backhaul path is unavailable and an alternative backhaul path is available, the alternative backhaul path is selected for data backhaul; when the LBT result indicates that the target backhaul path is available, the target backhaul path is selected for data backhaul.

[0118] The target backhaul path being unavailable can include at least one of the following:

[0119] The LBT result of at least one IAB node on the target backhaul path is failure;

[0120] The proportion of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold;

[0121] The number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

[0122] The alternative backhaul path being available can include at least one of the following:

[0123] The LBT result of no IAB node on the alternative backhaul path is failure;

[0124] a proportion of LBT failures of any IAB node on the alternative backhaul path is lower than a third preset threshold;

[0125] a number of LBT failures of any IAB node on the alternative backhaul path is lower than a fourth preset threshold.

[0126] Correspondingly, the availability of the target backhaul path can include at least one of the following cases:

[0127] an LBT result of no IAB node on the target backhaul path is failure;

[0128] a proportion of LBT failures of any IAB node on the target backhaul path is lower than a fifth preset threshold;

[0129] a number of LBT failures of any IAB node on the target backhaul path is lower than a sixth preset threshold.

[0130] The first preset threshold, the second preset threshold, the third preset threshold, the fourth preset threshold, the fifth preset threshold and the sixth preset threshold are used to determine the BAP routing selection of data backhaul. The specific values of these preset thresholds can be determined according to the business type and the actual application scenario, and different threshold values can be set for different backhaul paths. For example, the first preset threshold is greater than the third preset threshold, so as to preferentially reside on the target backhaul path. No specific limitation is made herein.

[0131] In the embodiment, the first IAB node can select to use the alternative backhaul path to transmit data when the target backhaul path is unavailable and the alternative backhaul path is available, and can select to use the target backhaul path to transmit data when the target backhaul path is available. In this way, the target backhaul path can be preferred for data transmission, and the alternative backhaul path can be used for data transmission only when the target backhaul path is unavailable or congested.

[0132] Of course, in a specific implementation, when the current residence is the alternative backhaul path, the target backhaul path can be selected to transmit data when the target backhaul path is available and the alternative backhaul path is unavailable. In this way, the frequency of re-routing can be reduced.

[0133] As an optional implementation, the LBT result can include at least one of the following:

[0134] an LBT result of an MT in at least one IAB node on the target backhaul path;

[0135] an LBT result of a distributed unit (DU) in at least one IAB node on the target backhaul path;

[0136] an LBT result of a MT in at least one IAB node on the alternative backhaul path;

[0137] an LBT result of a DU in at least one IAB node on the alternative backhaul path.

[0138] The LBT result of the MT can be used to represent availability or congestion of an uplink channel between the MT of the IAB node and the DU of the parent IAB node.

[0139] The LBT result of the DU can be used to represent availability or congestion of a downlink channel between the DU of the IAB node and the MT of the child IAB node.

[0140] In the embodiment, the uplink and downlink backhaul paths for data backhaul can be determined according to the availability or congestion of the uplink and downlink channels of the IAB nodes in the target backhaul path, and / or the availability or congestion of the uplink and downlink channels of the IAB nodes in the alternative backhaul path, so as to improve the reliability of the selected backhaul path.

[0141] On this basis, the LBT result can include at least one of the following:

[0142] a current LBT failure or success;

[0143] a ratio of LBT success or failure, or a number of times of LBT success or failure within a second preset time;

[0144] a ratio of LBT success or failure corresponding to an LBT type, or a number of times of LBT success or failure corresponding to the LBT type within a third preset time;

[0145] a ratio of LBT success or failure corresponding to a CAPC, or a number of times of LBT success or failure corresponding to the CAPC within a fourth preset time;

[0146] consistent LBT failure information.

[0147] In specific implementations, the lengths of the second preset time, the third preset time, and the fourth preset time can be the same. For example, for the target backhaul path, the result of LBT failure can include: current LBT failure, or the ratio of LBT failure is greater than or equal to a first preset threshold, or the ratio of LBT success is less than a seventh preset threshold, or the number of LBT failures within a second preset time is greater than or equal to a second preset threshold, or the number of LBT successes within the second preset time is less than an eighth preset threshold, and the like. The specific values of the seventh preset threshold and the eighth preset threshold similar to the first preset threshold can also be determined according to the type of service and the actual application scenario, and are not limited here.

[0148] In addition, in actual applications, there can be many types of LBT. The ratio of LBT success or failure corresponding to the type of LBT, or the number of LBT successes or failures within a third preset time corresponding to the type of LBT, can be understood as: different types of LBT can obtain different LBT results.

[0149] For example, LBT can include at least one of the following types:

[0150] Type one, for load based equipment (LBE), physical uplink shared channel (PUSCH) and physical downlink shared channel (PDSCH) can be used for transmission;

[0151] Type two, for gNB or UE, Category 4 LBT can be used to initiate a channel occupation time (COT), and gNB and UE can share the COT for data transmission.

[0152] The proportion of LBT success or failure corresponding to the CAPC, or the number of times of LBT success or failure corresponding to the CAPC within the fourth preset time can be understood as follows: when performing Category 4 type LBT, the transmitter (UE or gNB) can determine different channel priority classes (CAPC) according to different service types, to determine the length of the backoff window of LBT, and determine whether the LBT is successful after a contention window (including a fixed length and the length of the backoff) ends. The maximum length of the COT initiated by the transmitter according to different CAPC values is different; at the same time, the COT initiated using a CAPC value x can only allow logical channels (LCHs) with a CAPC value <= x to use the COT for data transmission.

[0153] Category three, for frame-based equipment (FBE), a second type (Category 2) LBT can be performed, and LBT with a shorter contention window can be performed.

[0154] The consistent LBT failure information can be understood as follows: LBT failure occurs multiple times within a period of time, which can be used to determine that the current unlicensed frequency band is unavailable.

[0155] Further, the LBT result can be the result of LBT failure, that is, only the LBT result of the IAB node with LBT failure in the backhaul path is obtained, and if the LBT failure result is not obtained, it indicates that the backhaul path is available.

[0156] In this way, unnecessary LBT results can be obtained to reduce resource consumption and simplify the calculation process.

[0157] Of course, the LBT result can also include only the result of LBT success, or include both the result of LBT success and the result of LBT failure, as long as the corresponding backhaul path with or without the IAB node with LBT failure can be determined according to the LBT result, which is not limited here.

[0158] It should be noted that in addition to the LBT result listed in the above embodiments, the number or proportion of data transmission errors (for example: Hybrid automatic repeat request (HARQ) transmission errors) can also be understood as a data transmission conflict, which can also be understood as a situation of the LBT result, in other words, the LBT result also includes: the proportion of data transmission errors of the first IAB node or the number of data transmission errors within the first preset time.

[0159] Similar to the second preset time, the third preset time and the fourth preset time described above, the first preset time can also be set according to business needs and application scenarios, which is not limited here.

[0160] It should be noted that after the first IAB node determines the BAP routing selection of data forwarding, the first IAB node can directly perform rerouting; or, the BAP routing selection of data forwarding is sent to other IAB nodes to instruct the other IAB nodes to select whether to perform rerouting accordingly. For example: assuming that the BAP routing selection of data forwarding is different from the current backhaul path, when the first IAB node has at least two next-hop IAB nodes, the first IAB node can directly perform rerouting to switch to a path with available channels or unoccupied channels; or, when the first IAB node has only one next-hop IAB node, the first IAB node can forward the determined BAP routing selection of data forwarding to other IAB nodes with at least two next-hop IAB nodes to instruct the other IAB nodes to perform rerouting.

[0161] As an optional implementation, the method further comprises:

[0162] The first IAB node receives the LBT result or the rerouting indication information sent by the second IAB node;

[0163] The first IAB node forwards the LBT result or the rerouting indication information of the second IAB node to a third IAB node;

[0164] The third IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node in the target backhaul path.

[0165] In the embodiment, the first IAB node can also forward the LBT result or the rerouting indication information of the second IAB node to a third IAB node, for example, taking downlink transmission as an example, the second IAB node can be a child IAB node of the first IAB node, and the third IAB node can be a parent IAB node or a donor IAB node of the first IAB node. For example: Figure 3bAs shown, assuming the first IAB node is IAB2, the second IAB node is IAB6 and IAB5, and the third IAB node is the donor IAB node, at this time, IAB2 can forward the LBT results detected by IAB6 and IAB5 to the donor IAB node, so that the donor IAB node determines the BAP routing of data forwarding according to the LBT results; or IAB2 can also determine that it needs to be rerouted according to the LBT results detected by IAB6 and IAB5, and forward the rerouting indication to the donor IAB node, so that the donor IAB node directly performs rerouting according to the rerouting indication.

[0166] Of course, in downlink transmission, the second IAB node can also include the parent IAB node or the host IAB node of the first IAB node, and the third IAB node can also include the child IAB node of the first IAB node; and in uplink transmission, the second IAB node can include the parent IAB node or the host IAB node of the first IAB node, and the third IAB node can include the child IAB node of the first IAB node, which will not be described here.

[0167] In implementation, when the first IAB node generates a rerouting indication for the adjacent IAB node according to the LBT result of the link to the next hop node of the target path, and sends it to the adjacent IAB node, the adjacent IAB node determines whether to perform rerouting according to the received rerouting indication.

[0168] As an optional implementation, the method further comprises:

[0169] The first IAB node generates first indication information according to the LBT result, wherein the first indication information is used to indicate the LBT result or to instruct the third IAB node to perform rerouting;

[0170] The first IAB node sends the first indication information to the third IAB node;

[0171] The first IAB node and the third IAB node are adjacent nodes on the target backhaul path or the alternative backhaul path.

[0172] In specific implementation, the first IAB node sending the first indication information to the third IAB node can include: when applied to uplink backhaul, the first IAB node can notify the LBT result of its MT to the child IAB node; when applied to downlink backhaul, the first IAB node can notify the LBT result of its DU to the parent IAB node.

[0173] In specific implementations, the first indication information is used to instruct the third IAB node to perform the rerouting, which can be understood as that the first indication information is generated when the first IAB node selects a backhaul path different from the current backhaul path according to the obtained LBT structure.

[0174] Specifically, the first indication information can include the following two cases:

[0175] Case one, the first indication information is used to indicate the LBT result, at this time, the third IAB node receiving the first indication information can obtain the LBT result from the first indication information, and determine whether to perform the rerouting based on the LBT result, or continue to forward the LBT result to other adjacent IAB nodes, etc.

[0176] Case two, the first indication information is used to instruct the third IAB node to perform the rerouting, at this time, the third IAB node receiving the first indication information can directly perform the rerouting based on the indication information.

[0177] In the embodiment, the LBT result of the first IAB node or the rerouting indication information obtained according to the LBT result can also be transmitted between adjacent IAB nodes on the backhaul path, so as to perform routing selection or execute the rerouting on a suitable third IAB node.

[0178] Further, the first indication information is used to instruct the third IAB node to perform the rerouting, including:

[0179] The first indication information is used to instruct the third IAB node to perform a first switching, and the first switching is to switch data with the first IAB node as a next hop node from the target backhaul path to an alternative backhaul path.

[0180] After the first IAB node sends the first indication information to the third IAB node, the method further includes:

[0181] The first IAB node sends second indication information to the third IAB node, wherein the second indication information is used to instruct the third IAB node to perform a second switching, and the second switching is to switch data with the first IAB node as a next hop node from the alternative backhaul path to the target backhaul path.

[0182] In specific implementations, the second switching can be understood as a reverse switching process of the first switching, so as to switch to the target backhaul path for data transmission when the preferred target backhaul path is restored. This can improve the utilization rate of the target backhaul path and shorten the occupation time of the alternative backhaul path.

[0183] Optionally, the first indication information and the second indication information respectively include at least one of the following:

[0184] an identifier of the sending IAB node;

[0185] an identifier of the affected backhaul path;

[0186] a BAP address of the affected destination IAB node.

[0187] The affected backhaul path can be understood as the current backhaul path and the backhaul path of the rerouting destination in the rerouting process, and the identifier of the backhaul path can be a BAP routing ID or other identifier capable of distinguishing the backhaul path.

[0188] The affected destination IAB node can include at least one of the following: the IAB node performing the rerouting, the IAB node on the current backhaul path, and the IAB node on the backhaul path of the rerouting destination.

[0189] It should be noted that in actual application, the third IAB node can also forward the received first indication information to other adjacent IAB nodes, such as the next-hop IAB node, which will not be described here.

[0190] In summary, the routing selection method provided by the embodiments of the present application can be used to obtain the LBT result by the first IAB node, and determine the BAP routing selection for data forwarding according to the LBT result. In this way, even if the IAB network operates in an unlicensed frequency band, it can also determine whether there is a high LBT failure probability or LBT failure on the target backhaul path and / or the alternative backhaul path according to the LBT result, and select the backhaul path with LBT success or low LBT failure probability from the target backhaul path and the alternative backhaul path as the backhaul path for data transmission, which can reduce the transmission delay.

[0191] Please refer to Figure 5 is a flowchart of a rerouting method provided by the embodiments of the present application, and the execution subject of the rerouting method can be a third IAB node, as Figure 5 shown, the rerouting method can include the following steps:

[0192] Step 501: The third IAB node obtains first indication information, wherein the first indication information is used to indicate an LBT result or instruct the third IAB node to perform rerouting.

[0193] Step 502: The third IAB node performs rerouting according to the first indication information.

[0194] The third IAB node is asFigure 2 The third IAB node in the method embodiment is the same as the first indication information described above, and the first indication information sent by the first IAB node in the method embodiment has the same meaning and effect as the first indication information described above, and details are not repeated here. Figure 2 The first indication information in the method embodiment is the indication information sent by the first IAB node, and the first indication information in the embodiment has the same meaning and effect as the first indication information described above, and details are not repeated here. Figure 2 The first indication information in the method embodiment has the same meaning and effect as the first indication information described above, and details are not repeated here.

[0195] Specifically, the third IAB node performing rerouting according to the first indication information can include the following two cases:

[0196] Case one, the first indication information is used to indicate the LBT result, at this time, the third IAB node can obtain the LBT result from the first indication information, and determine whether to perform rerouting based on the LBT result.

[0197] Case two, the first indication information is used to instruct the third IAB node to perform rerouting, at this time, the third IAB node can directly perform rerouting according to the indication of the first indication information.

[0198] Optionally, the first indication information includes at least one of the following:

[0199] The LBT result or the rerouting indication information sent by the first IAB node, wherein the first IAB node and the third IAB node are adjacent nodes on the target backhaul path;

[0200] The LBT result or the rerouting configuration information sent by the CU node.

[0201] In specific implementation, the LBT result or the rerouting configuration information sent by the CU node can be understood as follows: the CU node can aggregate or count the LBT results of each IAB node in the backhaul path, and forward the LBT aggregation or counting result to the third IAB node, so that the third IAB node determines whether to perform rerouting based on the LBT result; or the CU node determines to configure the third IAB node to perform rerouting according to the LBT aggregation or counting result, and generates rerouting configuration information, so that the third IAB node performs rerouting according to the rerouting configuration information.

[0202] Optionally, the third IAB node is a parent IAB node, a host IAB node or a child IAB node of the first IAB node in the target backhaul path.

[0203] Optionally, the LBT result includes at least one of the following:

[0204] The LBT result of the MT in at least one IAB node on the target backhaul path;

[0205] an LBT result of a DU in at least one IAB node on the target backhaul path;

[0206] an LBT result of a MT in at least one IAB node on the alternative backhaul path;

[0207] an LBT result of a DU in at least one IAB node on the alternative backhaul path.

[0208] Optionally, the third IAB node acquires first indication information, including:

[0209] The third IAB node receives an LBT result of a second IAB node forwarded by the first IAB node;

[0210] The second IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node on the target backhaul path.

[0211] Optionally, the third IAB node performs rerouting according to the first indication information, including:

[0212] The third IAB node switches data with the first IAB node as a next hop node from the target backhaul path to an alternative backhaul path according to the first indication information.

[0213] After the third IAB node performs rerouting according to the first indication information, the method further includes:

[0214] The third IAB node receives second indication information from the first IAB node;

[0215] The third IAB node switches data with the first IAB node as a next hop node from the alternative backhaul path to the target backhaul path according to the second indication information.

[0216] Optionally, the first indication information and the second indication information respectively include at least one of:

[0217] an identifier of a sending IAB node;

[0218] an identifier of an affected backhaul path;

[0219] a BAP address of an affected destination IAB node.

[0220] In the embodiments of the present application, the third IAB node can perform routing selection and rerouting according to the LBT result indicated by the received first indication information, or directly perform rerouting according to the indication of the first indication information, which has the same effect as Figure 2The implementation of the method embodiment shown in the first IAB node generating the first indication information according to the acquired LBT result and the implementation of the first IAB node sending the first indication information to the third IAB node have the same beneficial effects, which will not be described here.

[0221] Please refer to Figure 6 is a flowchart of a routing configuration method provided by the embodiments of the present application. The execution subject of the routing configuration method can be a first target IAB node, such as Figure 6 As shown, the routing configuration method can include the following steps:

[0222] Step 601, the first target IAB node receives target configuration information from a CU node, wherein the target configuration information is determined according to an LBT result related to a target backhaul path acquired by the CU node, and the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0223] In a specific implementation, the first target IAB node can perform re-routing according to the configuration of the target configuration information in the case of receiving the target configuration information. The first target IAB node can be an IAB node that can switch from the current backhaul path to the target backhaul path in the re-routing configuration, for example, as shown in Figure 3a The target backhaul path is: donor IAB-DU1→IAB1→IAB5→UE1, and the alternative backhaul path is: donor IAB-DU1→IAB2→IAB5→UE1, and the first target IAB node can be a donor IAB node.

[0224] Optionally, Figure 6 As shown, the routing configuration method further includes:

[0225] The first target IAB node sends a first LBT result to the CU node, and the first LBT result is an LBT result of the first target IAB node in the target backhaul path.

[0226] The LBT result related to the target backhaul path includes the first LBT result.

[0227] In a specific implementation, each IAB node in the target backhaul path can respectively transmit the respective LBT result to the CU node.

[0228] Correspondingly, each IAB node in the alternative backhaul path can also respectively transmit the respective LBT result to the CU node.

[0229] Optionally, the LBT result related to the target backhaul path includes at least one of the following:

[0230] the LBT result of each IAB node in the target backhaul path, and the LBT result of each IAB node in the alternative backhaul path;

[0231] the LBT result of the first IAB node in a target spatial direction, and the LBT result of the first IAB node in an alternative spatial direction, wherein the target spatial direction and the alternative spatial direction correspond to beams in different paths, or the target spatial direction and the alternative spatial direction correspond to different beams in the same path, and the target backhaul path includes the first IAB node;

[0232] the LBT result corresponding to the CAPC.

[0233] In specific implementations, each IAB node in the target backhaul path or the alternative backhaul path can report the respective LBT result to the CU node, or one IAB node can aggregate the LBT results of each IAB node in the target backhaul path or the alternative backhaul path and then report the aggregated LBT results to the CU node, so that the CU node determines whether to perform the rerouting according to the LBT results of each IAB node in the target backhaul path or the alternative backhaul path, and performs the rerouting to the first target IAB node in the current backhaul path when it is determined to perform the rerouting.

[0234] In addition, for the directional LBT, the LBT result can further include the LBT result of the first IAB node in a target spatial direction, and the LBT result of the first IAB node in an alternative spatial direction, wherein the target spatial direction and the alternative spatial direction have the same meaning as the target spatial direction and the alternative spatial direction in the method embodiment shown in Figure 2 , and will not be described here.

[0235] In addition, the LBT result corresponding to the CAPC has the same meaning as the proportion of LBT success or failure corresponding to the CAPC described in the method embodiment shown in Figure 2 , and will not be described here.

[0236] In the routing configuration method provided by the embodiments of the present application, the CU can perform unified configuration of the rerouting of the first target IAB node in the backhaul path according to the LBT result related to the target backhaul path, which can avoid the other IAB nodes in the backhaul path performing routing selection or rerouting respectively, and can avoid the repeated calculation and repeated data intercommunication of different IAB nodes, thereby simplifying the calculation process and the data transmission process of the rerouting.

[0237] Please refer to Figure 7 , which is a flowchart of another routing configuration method provided by the embodiments of the present application, as shown inFigure 7 The routing configuration method shown in FIG. 1 is different from the routing configuration method shown in FIG. 2 in that Figure 6 The routing configuration method shown in FIG. 1 is different from the routing configuration method shown in FIG. 2 in that Figure 7 The execution subject of the routing configuration method shown in FIG. 1 can be a CU node, while the execution subject of the routing configuration method shown in FIG. 2 is a first target IAB node. Figure 6 The execution subject of the routing configuration method shown in FIG. 1 can be a CU node, while the execution subject of the routing configuration method shown in FIG. 2 is a first target IAB node. Figure 7 The other routing configuration method shown in FIG. 3 can include the following steps:

[0238] Step 701: A CU node receives LBT results related to a target backhaul path from IAB nodes in the target backhaul path.

[0239] Step 702: The CU node sends target configuration information to a first target IAB node according to the LBT results related to the target backhaul path, wherein the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0240] Optionally, the LBT results related to the target backhaul path include at least one of the following:

[0241] The LBT results of each IAB node in the target backhaul path and the LBT results of each IAB node in an alternative backhaul path;

[0242] The LBT results of the first IAB node in a target direction and the LBT results of the first IAB node in an alternative direction, wherein the target direction and the alternative direction correspond to beams in different paths, or the target direction and the alternative direction correspond to different beams in the same path.

[0243] The LBT results corresponding to CAPC.

[0244] The routing configuration method provided by the embodiments of the present application corresponds to the routing configuration method in the method embodiment shown in FIG. 3, and can achieve the same beneficial effects. To avoid repetition, it will not be described here. Figure 6 The routing configuration method provided by the embodiments of the present application corresponds to the routing configuration method in the method embodiment shown in FIG. 3, and can achieve the same beneficial effects. To avoid repetition, it will not be described here.

[0245] It should be noted that the execution subject of the routing selection method provided by the embodiments of the present application can be a routing selection device, or a control module in the routing selection device for executing the routing selection method. In the embodiments of the present application, the routing selection device executing the routing selection method is taken as an example to illustrate the routing selection device provided by the embodiments of the present application.

[0246] Please refer to Figure 8 is a structural diagram of a routing selection device provided by the embodiments of the present application, which can be used for a first IAB node, as shown in FIG. 4. Figure 8As shown, the routing device 800 can include:

[0247] a first obtaining module 801, configured to obtain an LBT result;

[0248] a first determining module 802, configured to determine a BAP routing of data forwarding according to the LBT result.

[0249] Optionally, the first obtaining module 801 is specifically configured to perform at least one of the following:

[0250] receive an LBT result sent by a second IAB node, wherein the second IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node in a target backhaul path;

[0251] perform LBT to obtain an LBT result;

[0252] receive an LBT result sent by a CU node.

[0253] Optionally, the first obtaining module 801 includes:

[0254] a first detecting unit, configured to perform LBT in a target spatial direction to obtain an LBT result of the target spatial direction;

[0255] a second detecting unit, configured to perform LBT in an alternative spatial direction by the first IAB node to obtain an LBT result of the alternative spatial direction;

[0256] wherein the target spatial direction and the alternative spatial direction correspond to beams in different paths, or the target spatial direction and the alternative spatial direction correspond to different beams in the same path.

[0257] Optionally, the first determining module 802 includes:

[0258] a first selecting unit, configured to select to send data using a target backhaul path or a target beam corresponding to the target spatial direction in a case that LBT in the target spatial direction is successful or a failure proportion of LBT in the target spatial direction is lower than a first proportion threshold;

[0259] a second selecting unit, configured to select to send data using an alternative backhaul path or an alternative beam corresponding to the alternative spatial direction in a case that LBT in the target spatial direction is failed or the failure proportion of LBT in the target spatial direction is greater than or equal to the first proportion threshold, and LBT in the alternative spatial direction by the first IAB node is successful or the failure proportion of LBT in the alternative spatial direction is lower than a second proportion threshold.

[0260] Optionally, the LBT result further comprises at least one of a beam parameter of the target spatial direction and a beam parameter of the alternative spatial direction.

[0261] Optionally, the LBT result comprises at least one of:

[0262] an LBT result of an MT in at least one IAB node on the target backhaul path;

[0263] an LBT result of a DU in at least one IAB node on the target backhaul path;

[0264] an LBT result of an MT in at least one IAB node on the alternative backhaul path;

[0265] an LBT result of a DU in at least one IAB node on the alternative backhaul path.

[0266] Optionally, the LBT result comprises at least one of:

[0267] an LBT success or failure;

[0268] a proportion of LBT success or failure, or a number of times of LBT success or failure within a second preset time;

[0269] a proportion of LBT success or failure corresponding to an LBT type, or a number of times of LBT success or failure corresponding to the LBT type within a third preset time;

[0270] a proportion of LBT success or failure corresponding to a CAPC, or a number of times of LBT success or failure corresponding to the CAPC within a fourth preset time;

[0271] a consistency LBT failure information.

[0272] Optionally, the first determining module 802 is specifically configured to:

[0273] select to use the alternative backhaul path to send data under at least one of the following conditions:

[0274] an LBT result of at least one IAB node on the target backhaul path is a failure;

[0275] a proportion of LBT failure of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold;

[0276] a number of times of LBT failure of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold;

[0277] an LBT result of no IAB node on the alternative backhaul path is a failure;

[0278] a proportion of LBT failures of any IAB node on the alternative backhaul path is lower than a third preset threshold;

[0279] a number of LBT failures of any IAB node on the alternative backhaul path is lower than a fourth preset threshold.

[0280] Optionally, the first determining module 802 is specifically configured to:

[0281] select to use the target backhaul path to transmit data under at least one of the following conditions:

[0282] an LBT result of no IAB node on the target backhaul path is failure;

[0283] a proportion of LBT failures of any IAB node on the target backhaul path is lower than a fifth preset threshold;

[0284] a number of LBT failures of any IAB node on the target backhaul path is lower than a sixth preset threshold.

[0285] Optionally, the LBT result further includes a proportion of data transmission errors of the first IAB node or a number of data transmission errors within a first preset time.

[0286] Optionally, the routing device 800 further includes:

[0287] a first receiving module configured to receive LBT results or re-routing indication information sent by a second IAB node;

[0288] a first forwarding module configured to forward the LBT results or the re-routing indication information of the second IAB node to a third IAB node;

[0289] wherein the third IAB node is a parent IAB node, a host IAB node or a child IAB node of the first IAB node in the target backhaul path.

[0290] Optionally, the routing device 800 further includes:

[0291] a generating module configured to generate first indication information according to the LBT results, wherein the first indication information is used to indicate the LBT results or to instruct a third IAB node to perform re-routing;

[0292] a first sending module configured to send the first indication information to the third IAB node;

[0293] wherein the first IAB node and the third IAB node are adjacent nodes on the target backhaul path or the alternative backhaul path.

[0294] Optionally, the first indication information is used to instruct the third IAB node to perform the rerouting, and the rerouting includes:

[0295] The first indication information is used to instruct the third IAB node to perform the first switching, and the first switching is switching data with the first IAB node as a next hop node from the target backhaul path to an alternative backhaul path.

[0296] The routing device 800 further includes:

[0297] A fourth sending module is configured to send second indication information to the third IAB node, where the second indication information is used to instruct the third IAB node to perform a second switching, and the second switching is switching data with the first IAB node as a next hop node from the alternative backhaul path to the target backhaul path.

[0298] Optionally, the first indication information and the second indication information respectively include at least one of the following:

[0299] An identifier of the sending IAB node;

[0300] An identifier of the affected backhaul path;

[0301] A BAP address of the affected destination IAB node.

[0302] The routing device 800 provided by the embodiments of the present application can perform each step executed by the first IAB node in the routing method embodiment as shown in Figure 2 The same beneficial effects can be achieved, and thus details are not repeated here.

[0303] It should be noted that the execution subject of the rerouting method provided by the embodiments of the present application can be a rerouting device, or a control module in the rerouting device for executing the rerouting method. In the embodiments of the present application, the rerouting device executing the rerouting method is taken as an example to illustrate the rerouting device provided by the embodiments of the present application.

[0304] Please refer to Figure 9 , which is a structural diagram of a rerouting device provided by the embodiments of the present application. The rerouting device can be used for a third IAB node, as shown in Figure 9 The rerouting device 900 can include:

[0305] A second obtaining module 901 is configured to obtain first indication information, where the first indication information is used to instruct an LBT result or instruct the third IAB node to perform the rerouting;

[0306] A rerouting module 902 is configured to perform the rerouting according to the first indication information.

[0307] Optionally, the first indication information comprises at least one of:

[0308] LBT result or re-routing indication information sent by the first IAB node, wherein the first IAB node and the third IAB node are adjacent nodes on the target backhaul path;

[0309] LBT result or re-routing configuration information sent by the CU node.

[0310] Optionally, the third IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node in the target backhaul path.

[0311] Optionally, the LBT result comprises at least one of:

[0312] LBT result of MT in at least one IAB node on the target backhaul path;

[0313] LBT result of DU in at least one IAB node on the target backhaul path;

[0314] LBT result of MT in at least one IAB node on the alternative backhaul path;

[0315] LBT result of DU in at least one IAB node on the alternative backhaul path.

[0316] Optionally, the second obtaining module 901 is specifically configured to:

[0317] receive LBT result of the second IAB node forwarded by the first IAB node;

[0318] wherein the second IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node in the target backhaul path.

[0319] Optionally, the re-routing module 902 is specifically configured to:

[0320] switch data with the first IAB node as the next hop node from the target backhaul path to an alternative backhaul path according to the first indication information;

[0321] The re-routing apparatus 900 further comprises:

[0322] a second receiving module configured to receive second indication information from the first IAB node;

[0323] a switching module configured to switch data with the first IAB node as the next hop node from the alternative backhaul path to the target backhaul path according to the second indication information.

[0324] Optionally, the first indication information and the second indication information respectively include at least one of the following:

[0325] an identifier of the sending IAB node;

[0326] an identifier of the affected backhaul path;

[0327] a BAP address of the affected destination IAB node.

[0328] The rerouting apparatus 900 provided by the embodiments of the present application can perform each step performed by the third IAB node in the rerouting method embodiment as shown in Figure 5 The same beneficial effects can be achieved, and thus details are not repeated here.

[0329] It should be noted that the execution subject of the routing configuration method provided by the embodiments of the present application can be a routing configuration apparatus, or a control module in the routing configuration apparatus for executing the routing configuration method. In the embodiments of the present application, the routing configuration apparatus executing the routing configuration method is taken as an example to illustrate the routing configuration apparatus provided by the embodiments of the present application.

[0330] Please refer to Figure 10 , which is a structural diagram of a routing configuration apparatus provided by the embodiments of the present application. The routing configuration apparatus can be used for a first target IAB node, as shown in Figure 10 The routing configuration apparatus 1000 can include the following components.

[0331] A third receiving module 1001 is configured to receive target configuration information from a CU node, wherein the target configuration information is determined according to an LBT result related to a target backhaul path obtained by the CU node, and the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0332] Optionally, the routing configuration apparatus 1000 further includes the following components.

[0333] A second sending module is configured to send a first LBT result to the CU node, wherein the first LBT result is an LBT result of the first target IAB node in the target backhaul path.

[0334] The LBT result related to the target backhaul path includes the first LBT result.

[0335] Optionally, the LBT result related to the target backhaul path includes at least one of the following:

[0336] the LBT result of each IAB node in the target backhaul path, and the LBT result of each IAB node in the alternative backhaul path;

[0337] the LBT result of the first IAB node in a target spatial direction, and the LBT result of the first IAB node in an alternative spatial direction, wherein the target spatial direction and the alternative spatial direction correspond to beams in different paths, or the target spatial direction and the alternative spatial direction correspond to different beams in the same path, and the target backhaul path includes the first IAB node;

[0338] the LBT result corresponding to the CAPC.

[0339] The routing configuration device 1000 provided by the embodiments of the present application can perform each step executed by the first target IAB node in the routing configuration method embodiment as shown in Figure 6 The same beneficial effects can be achieved, and thus details are not repeated here.

[0340] It should be noted that the routing configuration method provided by the embodiments of the present application can be executed by a routing configuration device, or a control module in the routing configuration device for executing the routing configuration method. In the embodiments of the present application, the routing configuration device executes the routing configuration method as an example to illustrate the routing configuration device provided by the embodiments of the present application.

[0341] Please refer to Figure 11 is a structural diagram of a routing configuration device provided by the embodiments of the present application. The routing configuration device can be used in a CU node, as shown in Figure 11 The routing configuration device 1100 can include:

[0342] The fourth receiving module 1101 is configured to receive, from an IAB node in a target backhaul path, an LBT result related to the target backhaul path.

[0343] The third sending module 1102 is configured to send, to a first target IAB node, target configuration information according to the LBT result related to the target backhaul path, wherein the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0344] Optionally, the LBT result related to the target backhaul path includes at least one of:

[0345] the LBT result of each IAB node in the target backhaul path, and the LBT result of each IAB node in the alternative backhaul path;

[0346] an LBT result of the first IAB node in a target direction, and an LBT result of the first IAB node in an alternative direction, wherein the target direction and the alternative direction correspond to beams in different paths, or the target direction and the alternative direction correspond to different beams in a same path;

[0347] an LBT result corresponding to the CAPC.

[0348] The routing configuration apparatus 1100 provided by the embodiments of the present application can perform each step of the CU node in the routing configuration method embodiment as shown in Figure 7 The same beneficial effects can be achieved, and thus details are not repeated here.

[0349] Optionally, as shown in Figure 12 The embodiments of the present application also provide a network side device 1200, which includes a processor 1201, a memory 1202, a program or instruction stored in the memory 1202 and executable on the processor 1201, for example, when the communication device 1200 is an IAB node or a CU node, the program or instruction is executed by the processor 1201 to implement each process of the method embodiments as shown in Figure 2 、 Figure 5 、 Figure 6 or Figure 7 The same technical effects can be achieved, and thus details are not repeated here.

[0350] The embodiments of the present application also provide a network side device, which includes a processor and a communication interface.

[0351] In the first implementation, the communication interface is configured to obtain an LBT result, and the processor is configured to determine BAP routing selection of data forwarding according to the LBT result.

[0352] In the second implementation, the communication interface is configured to obtain first indication information, wherein the first indication information is used to indicate an LBT result or to instruct the third IAB node to perform rerouting, and the processor is configured to perform rerouting according to the first indication information.

[0353] In the third implementation, the communication interface is configured to receive target configuration information from a CU node, wherein the target configuration information is determined according to an LBT result of a target backhaul path related to the CU node, and the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0354] In a fourth implementation, the communication interface is configured to receive the target backhaul path related LBT result from an IAB node in the target backhaul path, and the communication interface is further configured to send target configuration information to a first target IAB node according to the target backhaul path related LBT result, wherein the target configuration information is used to configure BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node.

[0355] The network side device embodiment corresponds to the method embodiment as shown in Figure 2 , and the implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment and achieve the same technical effects. Figure 6 or Figure 7 The network side device embodiment corresponds to the method embodiment as shown in

[0356] Specifically, the embodiment of the present application further provides a network side device. As shown in Figure 13 , the network device 1300 includes an antenna 1301, a radio frequency device 1302, and a baseband device 1303. The antenna 1301 is connected to the radio frequency device 1302. In the uplink direction, the radio frequency device 1302 receives information through the antenna 1301 and sends the received information to the baseband device 1303 for processing. In the downlink direction, the baseband device 1303 processes the information to be sent and sends it to the radio frequency device 1302. The radio frequency device 1302 processes the received information and sends it out through the antenna 1301.

[0357] The above frequency band processing device can be located in the baseband device 1303. The method performed by the network side device in the above embodiment can be implemented in the baseband device 1303, which includes a processor 1304 and a memory 1305.

[0358] The baseband device 1303 may, for example, include at least one baseband board on which a plurality of chips are arranged, as shown in Figure 13 , one of the chips is, for example, a processor 1304 connected to a memory 1305 to call programs in the memory 1305 and perform the network device operations shown in the above method embodiment.

[0359] The baseband device 1303 can also include a network interface 1306 for interacting with the radio frequency device 1302. The interface is, for example, a common public radio interface (CPRI).

[0360] Specifically, the network side device of the embodiment of the present application further comprises instructions or programs stored on the memory 1305 and executable on the processor 1304, the processor 1304 invokes the instructions or programs in the memory 1305 to execute the method shown in the various modules of Figure 8 , Figure 9 , Figure 10 or Figure 11 achieve the same technical effects, and thus will not be described herein again.

[0361] The embodiment of the present application also provides a readable storage medium, the readable storage medium stores programs or instructions, the programs or instructions are executed by a processor to implement various processes of the method embodiments shown in Figure 2 , Figure 5 , Figure 6 or Figure 7 achieve the same technical effects, and thus will not be described herein again.

[0362] The processor is the processor in the terminal in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, etc.

[0363] The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions to implement various processes of the method embodiments shown in Figure 2 , Figure 5 , Figure 6 or Figure 7 achieve the same technical effects, and thus will not be described herein again.

[0364] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0365] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by more than one process, method, article, or apparatus either simultaneously, concurrently, or with intervening action that are carried out at the same time, in any order, or in an overlapping manner. For example, the described method can be performed in a different order or simultaneously, and the various steps can be combined or omitted, or additional steps can be added, without departing from the scope of the described method. Also, features described with respect to certain examples can be combined in other examples.

[0366] From the above description of the embodiments, it is apparent that the above-described method can be implemented by software and necessary universal hardware platform, of course, it can also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present application can be embodied in the form of computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a plurality of instructions for making a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the method described in various embodiments of the present application.

[0367] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-described specific embodiments, which are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A routing method, characterized by, The method comprises: A first self-backhaul IAB node acquires a listen before talk LBT result; The first IAB node determines backhaul adaptation protocol BAP routing selection for data forwarding according to the LBT result; The first IAB node determines BAP routing selection for data forwarding according to the LBT result, comprising: The first IAB node selects to use an alternative backhaul path to send data if a first condition is met, the first condition comprising at least one of: The LBT result of at least one IAB node on a target backhaul path is failure; The proportion of LBT failure of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; The number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

2. The routing method of claim 1, wherein, The first IAB node acquires the LBT result, comprising at least one of: The first IAB node receives an LBT result sent by a second IAB node, wherein the second IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node on a target backhaul path; The first IAB node performs LBT to obtain an LBT result; The first IAB node receives an LBT result sent by a central unit CU node.

3. The routing method of claim 2, wherein, The first IAB node performs LBT to obtain an LBT result, comprising: The first IAB node performs LBT in a target spatial direction to obtain an LBT result of the target spatial direction; The first IAB node performs LBT in an alternative spatial direction to obtain an LBT result of the alternative spatial direction; The target spatial direction and the alternative spatial direction correspond to beams in different paths, or the target spatial direction and the alternative spatial direction correspond to different beams in the same path.

4. The routing method of claim 3, wherein, The LBT result further comprises at least one of a beam parameter of the target spatial direction and a beam parameter of the alternative spatial direction.

5. The routing method of claim 3, wherein, The first IAB node determines BAP routing selection for data forwarding according to the LBT result, comprising: The first IAB node selects to use a target backhaul path or a target beam corresponding to the target spatial direction to send data if LBT in the target spatial direction is successful or the proportion of LBT failure in the target spatial direction is lower than a first proportion threshold; The first IAB node selects to use an alternative backhaul path or an alternative beam corresponding to the alternative spatial direction to send data if LBT in the target spatial direction is failure or the proportion of LBT failure in the target spatial direction is greater than or equal to the first proportion threshold, and LBT in the alternative spatial direction is successful or the proportion of LBT failure in the alternative spatial direction is lower than a second proportion threshold.

6. The routing method of claim 1, wherein, The LBT result comprises at least one of: An LBT result of a terminal function module MT in at least one IAB node on a target backhaul path; An LBT result of a distribution unit DU in at least one IAB node on the target backhaul path; an LBT result of a MT in at least one IAB node on the alternative backhaul path; an LBT result of a DU in at least one IAB node on the alternative backhaul path.

7. The routing method of claim 6, wherein, The LBT result comprises at least one of: an LBT success or failure; a ratio of LBT success or failure, or a number of times of LBT success or failure within a second preset time; a ratio of LBT success or failure corresponding to an LBT type, or a number of times of LBT success or failure corresponding to the LBT type within a third preset time; a ratio of LBT success or failure corresponding to a channel access priority class (CAPC), or a number of times of LBT success or failure corresponding to the CAPC within a fourth preset time; a consistent LBT failure information.

8. The routing method of claim 1, wherein, The first condition further comprises at least one of: an LBT result of no IAB node on the alternative backhaul path is a failure; a ratio of LBT failure of any IAB node on the alternative backhaul path is lower than a third preset threshold; a number of times of LBT failure of any IAB node on the alternative backhaul path is lower than a fourth preset threshold.

9. The routing method of claim 7, wherein, The first IAB node determines a backhaul adaptation protocol (BAP) routing selection of data forwarding according to the LBT result, and the method further comprises: The first IAB node selects to use the target backhaul path to transmit data under at least one of the following conditions: an LBT result of no IAB node on the target backhaul path is a failure; a ratio of LBT failure of any IAB node on the target backhaul path is lower than a fifth preset threshold; a number of times of LBT failure of any IAB node on the target backhaul path is lower than a sixth preset threshold.

10. The routing method of claim 1, wherein, The LBT result further comprises a ratio of data transmission error of the first IAB node or a number of times of data transmission error within a first preset time.

11. The routing method of claim 1, wherein, The method further comprises: The first IAB node receives LBT result or re-routing indication information transmitted by a second IAB node; The first IAB node forwards the LBT result or re-routing indication information of the second IAB node to a third IAB node; The third IAB node is a parent IAB node, a donor IAB node or a child IAB node of the first IAB node on the target backhaul path.

12. The routing method of claim 1, wherein, The method further comprises: The first IAB node generates first indication information according to the LBT result, wherein the first indication information is used to indicate the LBT result or instruct a third IAB node to perform re-routing; The first IAB node transmits the first indication information to the third IAB node; The first IAB node and the third IAB node are adjacent nodes on the target backhaul path or the alternative backhaul path.

13. The routing method of claim 12, wherein, The first indication information used to instruct the third IAB node to perform re-routing comprises: The first indication information is used to instruct the third IAB node to perform first switching, and the first switching is switching of data with the first IAB node as a next hop node from the target backhaul path to the alternative backhaul path. after the first IAB node sends the first indication information to the third IAB node, the method further comprises: the first IAB node sends second indication information to the third IAB node, wherein the second indication information is used to instruct the third IAB node to perform a second switching, and the second switching is to switch data with the first IAB node as a next hop node from the alternative backhaul path to the target backhaul path.

14. The routing method of claim 13, wherein, The first indication information and the second indication information respectively include at least one of: identifier of the sending IAB node; identifier of the affected backhaul path; BAP address of the affected destination IAB node.

15. A method of re-routing, characterized by, comprise: The third self-backhaul IAB node obtains first indication information, wherein the first indication information is used to indicate a listen before talk (LBT) result or instruct the third IAB node to perform a rerouting; The third IAB node performs rerouting according to the first indication information; The first indication information is information sent by a first node, and the third IAB node performs rerouting according to the first indication information, comprising: The third IAB node switches data with a first IAB node as a next hop node from a target backhaul path to an alternative backhaul path according to the first indication information; Wherein, the switching from the target backhaul path to the alternative backhaul path is under the condition that a first condition is met, and the first condition comprises at least one of: The LBT result of at least one IAB node on the target backhaul path is failure; The proportion of LBT failure of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; The number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

16. The re-routing method of claim 15, wherein, The first indication information comprises at least one of: LBT result or rerouting indication information sent by a first IAB node, wherein the first IAB node and the third IAB node are adjacent nodes on a target backhaul path; LBT result or rerouting configuration information sent by a centralized unit (CU) node.

17. The re-routing method of claim 16, wherein, The third IAB node is a parent IAB node, a host IAB node or a child IAB node of the first IAB node in the target backhaul path.

18. The re-routing method of claim 15, wherein, The LBT result comprises at least one of: LBT result of a terminal function module (MT) in at least one IAB node on a target backhaul path; LBT result of a distribution unit (DU) in at least one IAB node on the target backhaul path; LBT result of an MT in at least one IAB node on an alternative backhaul path; LBT result of a DU in at least one IAB node on the alternative backhaul path.

19. The re-routing method of claim 16, wherein, The third IAB node obtains first indication information, comprising: The third IAB node receives the LBT result of a second IAB node forwarded by the first IAB node; Wherein, the second IAB node is a parent IAB node, a host IAB node or a child IAB node of the first IAB node in the target backhaul path.

20. The re-routing method of claim 16, wherein, The third IAB node performs rerouting according to the first indication information, comprising: The third IAB node switches data with the first IAB node as a next hop node from the target backhaul path to an alternative backhaul path according to the first indication information; After the third IAB node performs the rerouting according to the first indication information, the method further includes: The third IAB node receives second indication information from the first IAB node; The third IAB node switches data with the first IAB node as a next hop node from the alternative backhaul path to the target backhaul path according to the second indication information.

21. The re-routing method of claim 20, wherein, The first indication information and the second indication information respectively include at least one of: An identifier of a sending IAB node; An identifier of an affected backhaul path; A backhaul adaptation protocol (BAP) address of an affected destination IAB node.

22. A method of routing configuration, the method comprising: The method includes: A first target self-backhaul IAB node receives target configuration information from a central unit (CU) node, wherein the target configuration information is determined according to a listen before talk (LBT) result related to a target backhaul path obtained by the CU node, and the target configuration information is used to configure backhaul adaptation protocol (BAP) routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node. The BAP routing selection includes: in a case where a first condition is met, selecting to send data using an alternative backhaul path, and the first condition includes at least one of: An LBT result of at least one IAB node on the target backhaul path is a failure; A proportion of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; A number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

23. The routing configuration method of claim 22, wherein, The method further includes: The first target IAB node sends a first LBT result to the CU node, and the first LBT result is an LBT result of the first target IAB node in the target backhaul path. The LBT result related to the target backhaul path includes the first LBT result.

24. The routing configuration method of claim 22, wherein, The LBT result related to the target backhaul path includes at least one of: An LBT result of each IAB node in the target backhaul path and an LBT result of each IAB node in an alternative backhaul path; An LBT result of a first IAB node in a target spatial direction and an LBT result of the first IAB node in an alternative spatial direction, wherein the target spatial direction and the alternative spatial direction correspond to different beams in different paths, or the target spatial direction and the alternative spatial direction correspond to different beams in a same path, and the target backhaul path includes the first IAB node; An LBT result corresponding to a channel access priority (CAPC).

25. A method of routing configuration, the method comprising: The method includes: A central unit (CU) node receives a listen before talk (LBT) result related to a target backhaul path from a self-backhaul IAB node in the target backhaul path; The CU node sends target configuration information to a first target IAB node according to the LBT result related to the target backhaul path, wherein the target configuration information is used to configure backhaul adaptation protocol (BAP) routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node. The BAP routing selection includes: in a case where a first condition is met, selecting to send data using an alternative backhaul path, and the first condition includes at least one of the following: The LBT result of at least one IAB node on the target backhaul path is a failure; The proportion of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; The number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

26. The routing configuration method of claim 25, wherein, The LBT result related to the target backhaul path includes at least one of the following: The LBT result of each IAB node in the target backhaul path and the LBT result of each IAB node in an alternative backhaul path; The LBT result of the first IAB node in a target direction and the LBT result of the first IAB node in an alternative direction, wherein the target direction and the alternative direction correspond to different beams in different paths, or the target direction and the alternative direction correspond to different beams in the same path; The LBT result corresponding to the channel access priority (CAPC).

27. A routing device, characterized by For a first self-backhauling IAB node, the routing selection device includes: A first acquisition module configured to acquire a listen before talk (LBT) result; A first determination module configured to determine backhaul adaptation protocol (BAP) routing selection of data forwarding according to the LBT result; The first determination module is specifically configured to: in a case where a first condition is met, select to send data using an alternative backhaul path, and the first condition includes at least one of the following: The LBT result of at least one IAB node on the target backhaul path is a failure; The proportion of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; The number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

28. The apparatus of claim 27, wherein, The first acquisition module is specifically configured to perform at least one of the following: Receive an LBT result sent by a second IAB node, wherein the second IAB node is a parent IAB node, a donor IAB node, or a child IAB node of the first IAB node in a target backhaul path; Perform LBT to obtain an LBT result; Receive an LBT result sent by a central unit (CU) node.

29. The apparatus of claim 27, wherein, Further comprising: A first receiving module configured to receive an LBT result or a rerouting indication information sent by a second IAB node; A first forwarding module configured to forward the LBT result or the rerouting indication information of the second IAB node to a third IAB node; The third IAB node is a parent IAB node, a donor IAB node, or a child IAB node of the first IAB node in a target backhaul path.

30. The apparatus of claim 27, wherein, Further comprising: The generating module is configured to generate first indication information according to the LBT result, wherein the first indication information is used to indicate the LBT result or instruct a third IAB node to perform rerouting. The first sending module is configured to send the first indication information to the third IAB node. The first IAB node and the third IAB node are adjacent nodes on a target backhaul path or an alternative backhaul path.

31. A re-routing device, characterized by The rerouting apparatus for a third self-backhaul IAB node comprises: The second obtaining module is configured to obtain first indication information, wherein the first indication information is used to indicate a listen-before-talk LBT result or instruct a third IAB node to perform rerouting. The rerouting module is configured to perform rerouting according to the first indication information. The rerouting module is specifically configured to switch data with the first IAB node as a next-hop node from the target backhaul path to an alternative backhaul path according to the first indication information. The target backhaul path is switched to the alternative backhaul path when a first condition is met, and the first condition comprises at least one of the following: An LBT result of at least one IAB node on the target backhaul path is a failure; A proportion of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; A number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

32. The apparatus of claim 31, wherein, The first indication information comprises at least one of the following: LBT result or rerouting indication information sent by the first IAB node, wherein the first IAB node and the third IAB node are adjacent nodes on a target backhaul path; LBT result or rerouting configuration information sent by a centralized unit CU node.

33. The apparatus of claim 32, wherein, The rerouting module is specifically configured to: Switch data with the first IAB node as a next-hop node from the target backhaul path to an alternative backhaul path according to the first indication information. The rerouting apparatus further comprises: The second receiving module is configured to receive second indication information from the first IAB node. The switching module is configured to switch data with the first IAB node as a next-hop node from the alternative backhaul path to the target backhaul path according to the second indication information.

34. A routing configuration apparatus, characterized by The routing configuration apparatus for a first target self-backhaul IAB node comprises: The third receiving module is configured to receive target configuration information from a centralized unit CU node, wherein the target configuration information is determined according to a listen-before-talk LBT result related to a target backhaul path obtained by the CU node, and the target configuration information is used to configure backhaul adaptation protocol BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path comprises the first target IAB node. The BAP routing selection comprises: selecting to use an alternative backhaul path to send data when a first condition is met, and the first condition comprises at least one of the following: An LBT result of at least one IAB node on the target backhaul path is a failure; a proportion of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; a number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

35. The apparatus of claim 34, wherein, Further comprising: a second sending module configured to send a first LBT result to the CU node, the first LBT result being an LBT result of the first target IAB node in the target backhaul path; wherein the LBT result related to the target backhaul path includes the first LBT result.

36. A routing configuration apparatus, characterized by For a centralized unit CU node, the routing configuration apparatus comprises: a fourth receiving module configured to receive an LBT result related to a target backhaul path from a self-backhauling IAB node in the target backhaul path; a third sending module configured to send target configuration information to a first target IAB node according to the LBT result related to the target backhaul path, wherein the target configuration information is used to configure backhaul adaptation protocol BAP routing selection of data forwarding of the first target IAB node, and the target backhaul path includes the first target IAB node; wherein the BAP routing selection includes: in a case where a first condition is met, selecting to use an alternative backhaul path to send data, the first condition including at least one of: an LBT result of at least one IAB node on the target backhaul path is a failure; a proportion of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a first preset threshold; a number of LBT failures of at least one IAB node on the target backhaul path is greater than or equal to a second preset threshold.

37. A first self-backhauling, IAB, node, characterized by, A processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the routing selection method according to any one of claims 1 to 14.

38. A third self-backhauling IAB node, comprising: A processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the re-routing method according to any one of claims 15 to 21.

39. A first target self-backhauling IAB node, comprising: A processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the routing configuration method according to any one of claims 22 to 24.

40. A central unit, CU, node, the CU node comprising: A processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the routing configuration method according to claim 25 or 26.

41. A readable storage medium characterized by, The readable storage medium stores programs or instructions, which, when executed by a processor, implement the steps of the routing method according to any one of claims 1 to 14, or implement the steps of the re-routing method according to any one of claims 15 to 21, or implement the steps of the routing configuration method according to any one of claims 22 to 24, or implement the steps of the routing configuration method according to claim 25 or 26.

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