Listen before talk lbt method, apparatus, network-side device and terminal device

Abstract

The application discloses a listen before talk (LBT) method, device, network side equipment and terminal equipment, and belongs to the technical field of communication. The LBT method comprises the following steps: a wireless node determines target LBT parameters, wherein the target LBT parameters comprise at least one of a first LBT parameter and a second LBT parameter; and the wireless node performs LBT on at least one of a first target transmission channel resource and a second target transmission channel resource based on the target LBT parameters.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a Listen Before Talk (LBT) method, apparatus, network-side equipment, and terminal equipment. Background Technology

[0002] In the existing R17 protocol, the Mobile Termination (MT) and Distributed Unit (DU) modules of the Integrated Access and Backhaul (IAB) node can be spatially multiplexed. For example, one multiplexing method is that the IAB-MT and IAB-DU of the IAB node can transmit simultaneously.

[0003] Additionally, when the IAB network operates in an unlicensed frequency band, the IAB transmitting node needs to perform a Level Bypass (LBT) to determine the transmission path based on the LBT result.

[0004] However, in related technologies, when multiplexing scheduling (IAB-MT transmission TX & IAB-DU TX) is configured on the IAB node, there is no agreement on how to execute LBT, and the existing LBT method cannot initiate the Channel Occupancy Time (COT) that can be used under the multiplexing scheduling.

[0005] As can be seen from the above, the LBT method in the relevant technology is not applicable to the multiplexing scheduling mode of IAB-MT and IAB-DU, which results in the inability to perform multiplexing transmission of IAB-MT and IAB-DU on unlicensed frequency bands, thus reducing the utilization efficiency of unlicensed frequencies. Summary of the Invention

[0006] This application provides an LBT method, apparatus, network-side device, and terminal device that can solve the problem in IAB networks where IAB-MT and IAB-DU multiplexing transmissions cannot be performed on unlicensed frequency bands.

[0007] Firstly, an LBT method is provided, which includes:

[0008] The wireless node determines the target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter;

[0009] The wireless node performs LBT on at least one of the first target transmission channel resources and the second target transmission channel resources based on the target LBT parameters.

[0010] Secondly, an LBT device is provided, comprising:

[0011] A first determining module is configured to determine target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter;

[0012] An execution module is configured to perform an LBT on at least one of the first target transmission channel resources and the second target transmission channel resources based on the target LBT parameters.

[0013] Thirdly, a network-side device is provided, the network-side device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0014] Fourthly, a network-side device is provided, including a processor and a communication interface, wherein the processor is used to determine target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter, and the communication interface is used to perform LBT on at least one of a first target transmission channel resource and a second target transmission channel resource based on the target LBT parameters.

[0015] Fifthly, a terminal device is provided, the terminal device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0016] In a sixth aspect, a terminal device is provided, including a processor and a communication interface, wherein the processor is configured to determine target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter, and the communication interface is configured to perform LBT on at least one of a first target transmission channel resource and a second target transmission channel resource based on the target LBT parameters.

[0017] In a seventh aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0018] Eighthly, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect.

[0019] In a ninth aspect, a computer program / program product is provided, the computer program / program product being stored in a non-volatile storage medium, the program / program product being executed by at least one processor to implement the steps of the LBT method as described in the first aspect.

[0020] In this embodiment of the application, when multiplexing of the first target transmission channel resource and the second target transmission channel resource is configured, if the wireless node operates in an unlicensed frequency band, the wireless node can perform LBT on the first target transmission channel resource and / or the second target transmission channel resource to be multiplexed according to the first LBT parameter and / or the second LBT parameter, so as to initiate COT that can be used in the multiplexing scheduling mode according to the LBT result, so as to support the multiplexing transmission of the first target transmission channel resource and the second target transmission channel resource, thereby improving the utilization efficiency of the unlicensed frequency. Attached Figure Description

[0021] Figure 1a This is a structural diagram of an IAB network that can be applied in this application;

[0022] Figure 1b This is a structural diagram of the IAB-MT and IAB-DU of the IAB system;

[0023] Figure 2 This is a flowchart of an LBT method provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the target transmission time location in an embodiment of this application;

[0025] Figure 4 This is a structural diagram of an LBT device provided in this application;

[0026] Figure 5 This is a structural diagram of a communication device provided in this application;

[0027] Figure 6 This is a structural diagram of a network-side device provided in this application.

[0028] Figure 7 This is a structural diagram of a terminal device provided in this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0030] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0031] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to applications other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0032] The IAB system is a technology under development for the New Radio (NR) Rel-16 standard. By introducing the IAB system, the problem of inadequate wired transmission network deployment can be solved when access points are densely deployed. That is, in the absence of a wired transmission network, access points can rely on the wireless network for data backhaul. The wireless node executing the LBT method provided in this application embodiment can be any transmitting or forwarding IAB node in the IAB system.

[0033] Of course, the aforementioned wireless node can also be a relay terminal (UE), which is configured with a sidelink (SL) and can provide sidelink relay services between remote terminals or base station nodes through the sidelink relay function. The LBT method provided in this application embodiment can also be used in the LBT process of unlicensed frequency backhaul of Sidelink Relay. In this case, the first LBT parameter can be the LBT parameter of the transmission channel between the relay terminal and the remote terminal, and the second LBT parameter can be the LBT parameter of the transmission channel between the relay terminal and the base station node.

[0034] For ease of explanation, the following embodiments use IAB nodes in the IAB network as an example for illustration, which does not constitute a specific limitation.

[0035] When NR operates on unlicensed frequencies, before transmitting on a particular channel, the transmitter (UE or gNB) should, according to the LBT procedure, detect the channel to determine its availability. Specifically, the transmitter measures the received power on the channel. If the received power exceeds a preset value (also known as the received power threshold, used to determine if the channel is occupied), the channel is considered occupied. Conversely, if the received power is below a preset value, the channel is considered unoccupied and can be used for NR signal transmission.

[0036] Currently, there are several types of LBT. For PUSCH and PDSCH transmissions, the gNB / UE can use Category 4 LBT to initiate a Channel Occupation Time (COT). In this case, the gNB and UE can share this COT to transmit data within its duration. When performing Category 4 LBT, the transmitter (gNB / UE) can determine different CAPCs based on different service types. This CAPC is used to determine the LBT backoff window length, resulting in different maximum COT durations for LBTs initiated based on different CAPC values. Specifically, the Maximum Channel Occupation Time (MCOT) initiated by LBTs based on different CAPC values ​​is different. Generally speaking, the higher the channel access priority, the shorter the initiated maximum channel occupancy time. At the same time, a COT initiated using a certain CAPC value x can only be used by logical channels (LCH) with higher channel access priority (i.e., CAPC value ≤ x) for data transmission.

[0037] In related technologies, when an IAB node has data to be transmitted, the CAPC of the LBT it performs is determined based on the 5QI of the logical channel where the data to be transmitted resides, as shown in Table 1 below:

[0038] Table 1

[0039]

[0040]

[0041] It is worth noting that, as shown in Table 1 above, the smaller the CAPC value, the higher the channel access priority.

[0042] Specifically, based on the mapping between the 5QI and CAPC values ​​of the logical channel carrying data, as shown in Table 1 above, the CAPC value corresponding to the 5QI of the logical channel to be transmitted can be determined. Furthermore, when a Medium Access Control Protocol Data Unit (MACPDU) contains data for multiple logical channels, the CAPC value with the highest CAPC value among these multiple logical channels (i.e., the lowest channel access priority) is the CAPC value for performing LBT.

[0043] Additionally, for MAC CE and RRC signaling, the CAPC value is determined according to the pre-configured channel access priority of the MAC CE and RRC signaling. For example: RRC signaling corresponds to the highest priority; when the MAC PDU only contains MAC control elements (CEs), the CAPC value corresponding to the MAC CE with the highest channel access priority (i.e., the smallest CAPC value) is used to perform LBT; the recommended bitrate MAC CE corresponds to the lowest priority; information carried by the common control channel is subject to the highest priority.

[0044] Based on this, the maximum channel occupation time (MCOT) initiated by LBT varies depending on the CAPC value. Specifically, as an optional implementation method, the correspondence between CAPC and MCOT (i.e., Tmcot,p) is shown in Table 2 below:

[0045] Table 2

[0046]

[0047]

[0048] According to the correspondence between CAPC and MCOT shown in Table 2 above, the higher the priority of CAPC, the shorter the time it may occupy the channel. However, the existing communication protocol stipulates that a COT initiated using a certain CAPC value x can only be used by a logical channel (LCH) with a higher channel access priority (i.e., CAPC value ≤ x) to transmit data.

[0049] Thus, when the IAB system is configured with multiplexing scheduling for simultaneous transmission of IAB-MT and IAB-DU from the same IAB node, given that IAB-MT and IAB-DU from the same IAB node can have different LBT parameters, the transmitting or forwarding IAB node does not know which LBT parameter to use for LBT, nor what kind of LBT to perform. In addition, even if IAB-MT and IAB-DU perform LBT, the initiated COT is not applicable to the multiplexing scheduling mode for simultaneous transmission of IAB-MT and IAB-DU, thus making the channel access behavior inconsistent with the usage regulations of unlicensed frequencies. This makes it impossible to realize the multiplexing scheduling mode for simultaneous transmission of IAB-DU and IAB-MT from the same IAB node under unlicensed frequencies.

[0050] In this embodiment, when multiplexing of the first and second target transmission channel resources is configured, if the wireless node operates in an unlicensed frequency band, it can perform LBT on the first and / or second target transmission channel resources according to the first and / or second LBT parameters. Based on the LBT result, it can initiate COT (Content-Oriented Transmission) that can be used in the multiplexing mode to support multiplexing of the first and second target transmission channel resources, thereby improving the utilization efficiency of unlicensed frequencies. It is worth noting that when the IAB-DU and IAB-MT of the same IAB node perform spatial multiplexing transmission, the time-frequency resources corresponding to the first and second target transmission channel resources can completely or partially overlap in the time and frequency domains.

[0051] The LBT method provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0052] Figure 1a This diagram illustrates a block diagram of an IAB system to which embodiments of this application can be applied. Figure 1aAs shown, an IAB system may include: an access IAB node 11, an intermediate IAB node 12, and a host IAB node 13, wherein the host IAB node 13 may be connected to a wired transmission network.

[0053] like Figure 1a and 1b As shown, all IAB nodes except the host IAB node 13 can include a DU and an MT. Relying on the MT, an access point (i.e., an IAB node) can find an upstream access point (i.e., a parent IAB node) and establish a radio connection with the upstream access point's DU. This radio connection is called a backhaul link. After an IAB node establishes a complete backhaul link, it activates its DU function. The DU provides cell services, meaning it can provide access services to terminal 14. An integrated access and backhaul loop includes a host IAB (donor IAB) node, which has a directly connected wired transmission network.

[0054] The aforementioned terminal 14 can also be referred to as terminal equipment or user equipment (UE). It can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), and other terminal-side devices. Wearable devices include smartwatches, wristbands, headphones, glasses, etc., without specific limitations.

[0055] In addition, such as Figure 1b As shown, in an integrated access and backhaul loop, all IAB nodes' DUs are connected to a central control unit (CU), which configures the DUs via the F1-AP protocol. The CU configures the MTs via the Radio Resource Control (RRC) protocol.

[0056] The LBT method provided in this application embodiment can be used as follows: Figure 1a Any sending or forwarding node in the illustrated embodiment can be, for example, a sending or forwarding node. Figure 1a The IAB node 11 or IAB node 12 shown is an access node.

[0057] Please see Figure 2 The LBT method provided in this application embodiment may include the following steps:

[0058] Step 201: The wireless node determines the target LBT parameters, wherein the target LBT parameters include at least one of the first LBT parameters and the second LBT parameters.

[0059] In specific implementations, the aforementioned wireless node can be an IAB node or a relay terminal. For ease of explanation, this embodiment uses the first IAB node as an example. This first IAB node is configured with multiplexing scheduling for IAB-MT and IAB-DU. The first LBT parameter is the LBT parameter corresponding to the IAB-MT, and the second LBT parameter is the LBT parameter corresponding to the IAB-DU.

[0060] The aforementioned multiplexing scheduling can be understood as the spatial multiplexing of IAB-MT and IAB-DU. For example, IAB-MT and IAB-DU can transmit simultaneously on different transmission channel resources. In other words, the first IAB node can transmit on both the uplink and downlink channels simultaneously.

[0061] In addition, the LBT parameters corresponding to the above IAB-MT can be understood as at least one of the following: LBT parameters determined autonomously by IAB-MT, LBT parameters corresponding to the data to be transmitted by IAB-MT, LBT parameters determined by IAB-MT according to the instructions of the parent IAB node, and LBT parameters obtained by IAB-MT after comprehensively considering the data to be transmitted and the transmission status of IAB-MT and IAB-DU, etc.

[0062] Accordingly, the LBT parameters corresponding to the IAB-DU can be understood as at least one of the following: LBT parameters determined autonomously by the IAB-DU, LBT parameters corresponding to the data to be transmitted by the IAB-DU, DU resource allocation, and LBT parameters obtained by the IAB-DU after comprehensively considering factors such as the data to be transmitted by the IAB-MT and the IAB-DU, and the transmission status, etc.

[0063] Optionally, the LBT parameters include at least one of the following:

[0064] Contention window length;

[0065] Receive power threshold;

[0066] Channel Access Priority Class (CAPC);

[0067] LBT type;

[0068] The received power threshold is used to determine whether at least one of the first target transmit channel resource and the second target transmit channel resource is available.

[0069] The aforementioned contention window length can represent the contention window length of the LBT being executed, which can be determined based on the corresponding CAPC value, service type, etc.

[0070] The aforementioned receive power threshold is a preset value for the receive power used to determine whether a channel is occupied. Thus, if the receive power on a certain channel is greater than the receive power threshold corresponding to that channel, it can be determined that the channel is occupied, and therefore, the channel is unavailable.

[0071] The CAPC mentioned above can be determined based on the priority of the data to be transmitted in IAB-MT and IAB-DU, the channel access priority of the logical channel corresponding to the data to be transmitted, or the indication of the parent IAB node. The parent IAB node can be the host IAB node in the IAB network (i.e., a node that only includes IAB-DU) or a regular IAB node (i.e., a node that includes both IAB-MT and IAB-DU).

[0072] The LBT type mentioned above can be the LBT type indicated by the parent IAB node.

[0073] It is worth noting that the IAB-MT and IAB-DU of the first IAB node can have the same or different LBT parameters, and the first IAB node can select one of IAB-MT and IAB-DU to perform LBT, or IAB-MT and IAB-DU can perform LBT separately, for example: performing consistent LBT or inconsistent LBT separately.

[0074] Optionally, the first IAB node determines the target LBT parameters, including at least one of the following:

[0075] The first IAB node determines the target LBT parameters based on the instructions from the parent IAB node;

[0076] The first IAB node determines the target LBT parameters based on DU resource allocation;

[0077] The first IAB node autonomously determines the target LBT parameters.

[0078] The aforementioned indication from the parent IAB node can be understood as: the indication information sent by the parent IAB node's IAB-DU (hereinafter referred to as the parent IAB-DU) to the first IAB node's IAB-MT, which may carry at least some of the parameters from the target LBT parameters. For example, the parent IAB-DU may carry parameters such as the CAPC value in the uplink transmission permission message sent to the first IAB node's IAB-DU.

[0079] The above DU resource allocation can be understood as: DU time-frequency resource configuration, for example: whether the multiplexing scheduling mode for simultaneous transmission of IAB-MT and IAB-DU is configured on the HARD of the parent IAB-DU of the first IAB node or on the HARD of the IAB-DU of the first IAB node; or, it may also include the configuration of other types of resources (such as soft resources) of the first IAB node, which are not specifically limited here.

[0080] The aforementioned autonomous determination of target LBT parameters can be understood as follows: IAB nodes can autonomously determine LBT parameters based on their own service type, the priority of the data to be transmitted, the priority of the logical channel corresponding to the data to be transmitted, and other parameters, which will not be elaborated here.

[0081] It is worth noting that the first IAB node can comprehensively consider at least two of the following: the instructions from the parent IAB node, the DU resource allocation, and its own transmission status, in order to obtain the target LBT parameters.

[0082] Step 202: The wireless node performs LBT on at least one of the first target transmission channel resources and the second target transmission channel resources based on the target LBT parameters.

[0083] In specific implementation, the first target transmission channel resource is the time-frequency resource transmitted by the wireless node to the first neighboring wireless node; and / or

[0084] The second target transmission channel resource is the time-frequency resource transmitted by the wireless node to the second neighboring wireless node; and / or

[0085] The first target transmission channel resource and the second target transmission channel resource are used by the wireless node for multiplexing transmission in at least one domain of the time domain, frequency domain, and spatial domain.

[0086] Here, the first adjacent wireless node and the second adjacent wireless node refer to wireless nodes adjacent to the wireless node in the transmission path, and the first adjacent wireless node and the second adjacent wireless node are different wireless nodes. In operation, the wireless node can transmit to the first adjacent wireless node, or to the second adjacent wireless node, or the wireless node can transmit to the first adjacent wireless node and the second adjacent wireless node in at least one of the time domain, frequency domain, and spatial domain, so as to achieve multiplexed transmission.

[0087] For example, when the wireless node is an IAB node, the first target transmission channel resource can be the transmission channel resource used by IAB-MT, i.e., the uplink channel resource; the second target transmission channel resource can be the transmission channel resource used by IAB-DU, i.e., the downlink channel resource.

[0088] Of course, the aforementioned wireless nodes can also be other wireless nodes besides IAB nodes, for example:

[0089] The wireless node is a relay terminal, and the relay terminal is configured with an SL (Side Link Service), which is used to provide a sidelink relay service between the remote terminal and the base station node; and / or

[0090] The first adjacent wireless node is a base station device, a relay terminal, or a remote terminal; and / or

[0091] The second adjacent wireless node is a base station device, a relay terminal, or a remote terminal.

[0092] For ease of explanation, the following embodiments use the wireless node as the first IAB node as an example for illustration.

[0093] In this step, the first IAB node performs LBT on at least one of the first target transmit channel resources and the second target transmit channel resources based on the target LBT parameters. It can initiate COT that can be used for the multiplexing scheduling mode of IAB-MT and IAB-DU to support the multiplexing scheduling mode of IAB-MT and IAB-DU.

[0094] Specifically, when the first IAB node performs an LBT on one of the first and second target transmit channel resources based on the target LBT parameters (e.g., IAB-MT and IAB-DU share a radio frequency unit), the COT initiated based on the performed LBT can be shared between IAB-MT and IAB-DU, so that the COT used by IAB-MT and IAB-DU meets the requirements of the multiplexing scheduling mode of IAB-MT and IAB-DU. Alternatively, the first IAB node can also perform an LBT on the first and second target transmit channel resources respectively based on the target LBT parameters to initiate a COT that can be used for the multiplexing scheduling mode of IAB-MT and IAB-DU, which can also support the multiplexing scheduling mode of IAB-MT and IAB-DU.

[0095] As an optional implementation, the first IAB node performs LBT using at least one of the following LBT modes:

[0096] Consistent LBT, wherein, under the consistent LBT, the IAB-MT and IAB-DU of the first IAB node perform LBT respectively based on the same LBT parameters, or, one of the IAB-MT and IAB-DU performs primary LBT and the other performs secondary LBT;

[0097] Inconsistent LBT: Under the inconsistent LBT, the IAB-MT and IAB-DU of the first IAB node perform LBT based on not exactly the same LBT parameters.

[0098] Execute LBT according to the LBT parameters indicated by the parent IAB node;

[0099] Execute LBT according to the LBT parameters determined based on DU resource allocation;

[0100] LBT is performed by one of the IAB-MT and IAB-DU of the first IAB node.

[0101] Implementation Method 1

[0102] The first IAB node performing consistent LBT can be understood as follows: both IAB-MT and IAB-DU of the first IAB node perform LBT, and IAB-MT and IAB-DU use the same LBT parameters, such as LBT type, CAPC value, contention window length, etc.

[0103] In one alternative implementation, when IAB-MT and IAB-DU use consistent LBT for channel access, after their respective LBTs are successful, the MCOT time domains obtained by IAB-MT and IAB-DU through competition overlap, and the restrictions on data transmission are also the same.

[0104] In another alternative implementation, such as Figure 3 As shown, when IAB-MT and IAB-DU use consistent LBT in master-slave mode, one of IAB-DU and IAB-MT performs a complete LBT process (i.e., master LBT) on the corresponding channel (LBT channel 0) before the target transmission time position, while the other performs only a short LBT (i.e., slave LBT) on the corresponding channel (LBT channel 1) before the target transmission time position, for example: Type 2 LBT.

[0105] Specifically, the main LBT includes: a complete LBT process prior to the target transmission time position on the first transmission channel resource; the complete LBT process includes: a process of listening to the channel within a first fixed short duration, and a process of listening to the channel within a random duration determined according to pre-configured parameters; the first transmission channel resource is one of the first target transmission channel resource and the second target transmission channel resource corresponding to the IAB-MT or IAB-DU that performs the main LBT;

[0106] The auxiliary LBT includes a short LBT process prior to the target transmission time position on the second transmission channel resource; the short LBT process includes a process of listening to the channel within a second fixed short duration; the second transmission channel resource is one of the first target transmission channel resource and the second target transmission channel resource corresponding to the IAB-MT or IAB-DU that performs the auxiliary LBT.

[0107] Furthermore, when the first IAB node performs consistent LBT, the first IAB node autonomously determines the target LBT parameters, including at least one of the following:

[0108] The first IAB node determines the target CAPC based on the priority of the information to be transmitted by the IAB-MT and IAB-DU of the first IAB node or the 5QI of the logical channel. Both the IAB-MT and IAB-DU of the first IAB node use the target CAPC.

[0109] The first IAB node determines the target receive power threshold based on the receive power threshold of the IAB-MT and the receive power threshold of the IAB-DU of the first IAB node. Both the IAB-MT and the IAB-DU of the first IAB node use the target receive power threshold.

[0110] On the one hand, in this embodiment, the target 5QI can be determined based on the 5QI of the lowest priority data / logical channel in the data to be transmitted in IAB-DU and IAB-MT, and then the CAPC value in the target LBT parameters can be determined based on the correspondence between the target 5QI and the CAPC value (as shown in Table 1); optionally, the contention window length of LBT can also be determined based on the CAPC value and the parameters corresponding to the CAPC value (as shown in Table 2).

[0111] On the other hand, the first IAB node determines the target receive power threshold based on the receive power threshold of the IAB-MT and the receive power threshold of the IAB-DU, including:

[0112] The IAB-MT and IAB-DU of the first IAB node each determine their respective receive power thresholds;

[0113] The first IAB node determines the lower of the receive power threshold of IAB-MT and IAB-DU as the target receive power threshold; or, the first IAB node determines the receive power threshold of the one performing the primary LBT in IAB-MT and IAB-DU as the target receive power threshold.

[0114] In this implementation, the receive power threshold in the target LBT parameters can be determined based on the more stringent power threshold (i.e., the lower receive power threshold) among the receive power thresholds corresponding to IAB-DU and IAB-MT; or, the receive power threshold in the target LBT parameters can be determined based on the receive power threshold of the party performing the primary LBT in IAB-MT and IAB-DU.

[0115] Of course, for non-consistent LBT, the received power threshold used to determine whether the channel is occupied in the first LBT parameter and the second LBT parameter can be determined by IAB-MT and IAB-DU respectively.

[0116] Implementation Method 2

[0117] The first IAB node performs inconsistent LBT, which can be understood as follows: IAB-MT and IAB-DU each perform LBT, and at least one of the LBT parameters (e.g., CAPC, contention window length, etc.) used by IAB-MT and IAB-DU is different.

[0118] Optionally, if the first IAB node performs a non-consistent LBT, step 201 includes:

[0119] The IAB-MT and IAB-DU of the first IAB node determine their respective LBT parameters;

[0120] Step 202 includes:

[0121] The IAB-MT and IAB-DU of the first IAB node perform LBT before the common target transmission time position based on their respective LBT parameters, and determine their respective COT.

[0122] In this implementation, after IAB-MT and IAB-DU determine LBT parameters such as CAPC, contention window length, and channel occupancy power threshold according to their respective services, IAB-MT and IAB-DU execute LBT before the common target transmission time position to initiate their respective COT.

[0123] Based on this, the COT length for IAB-MT and IAB-DU multiplexing and scheduling transmission is less than or equal to the shorter of the MCOT time domain lengths corresponding to the two CAPC values. In other words, the COTs initiated by IAB-MT and IAB-DU respectively partially overlap in the time domain. Therefore, the COT for IAB-MT and IAB-DU multiplexing and scheduling transmission can be the overlapping part of the two COTs.

[0124] Implementation Method 3

[0125] The first IAB node performs LBT according to the LBT parameters indicated by the parent IAB node. This can be understood as follows: if the first IAB node's IAB-MT receives an indication from the parent IAB node's IAB-DU (hereinafter referred to as the parent IAB-DU) regarding at least one of the LBT parameters such as LBT type and CAPC value, then the first IAB node can perform LBT according to the received indication, or, after comprehensively considering the indication and its own transmission status, obtain the LBT parameters for performing LBT.

[0126] In practice, the parent IAB-DU can carry the indicated LBT parameters in the uplink transmission permission. Of course, the parent IAB-DU can also carry the indicated LBT parameters through other signaling or messages, which is not specifically limited here.

[0127] It is worth noting that this implementation method can also be combined with the consistent LBT in implementation method one. For example, the first IAB node can perform consistent LBT according to the LBT parameters indicated by the parent IAB node, or the parent IAB node can instruct the first IAB node to perform the main LBT between IAB-DU and IAB-MT, while the other performs the auxiliary LBT. No specific limitation is made here.

[0128] Implementation Method 4

[0129] The first IAB node executes LBT according to the LBT parameters determined based on DU resource allocation. This can be understood as follows: the multiplexing scheduling of simultaneous transmission of IAB-MT and IAB-DU may be configured on the HARD resources of the IAB-DU of the first IAB node, or it may be configured on the HARD resources of the parent IAB-DU.

[0130] Based on the existing resource allocation of IAB nodes, the CU can allocate resources to an IAB-DU of an IAB node via F1 signaling. The time-frequency resource configuration types for IAB-DUs include hard, soft, and not available (NA) types. Hard or soft resources further include uplink, downlink, and flexible uplink / downlink; while NA represents unavailable physical resources. Hard resources allocated to an IAB-DU are resources that the IAB-DU can use independently; soft resources allocated to an IAB-DU are resources that the IAB-DU can only use when its parent IAB-DU does not use these resources; resources indicated as NA are resources that the IAB node cannot use. In addition, the parent IAB-DU can dynamically indicate to the child IAB node whether soft resources are available; if indicated as available, the child IAB-DU can use these resources.

[0131] Based on this, in this embodiment, the first IAB node can also determine, according to DU resource allocation, whether to determine the LBT parameters based on the information of the IAB-MT, the information of the IAB-DU, or the instructions of the parent IAB node. For example, when the first IAB node is configured with multiplexing scheduling, both the IAB-MT and the IAB-DU of the first IAB node need to schedule resources. In this case, if the multiplexing resource is scheduled on the HARD resource of the parent IAB-DU of the first IAB node, the IAB-MT of the first IAB node can preferentially perform the main LBT, determine the target LBT parameters, or act as the party performing the LBT. Correspondingly, if the multiplexing resource is scheduled on the HARD resource of the IAB-DU of the first IAB node, the IAB-DU of the first IAB node can preferentially perform the main LBT, determine the target LBT parameters, or act as the party performing the LBT.

[0132] As an optional implementation, the first IAB node determines the target LBT parameters based on DU resource allocation, including:

[0133] When the multiplexing scheduling is configured on the HARD resources of the parent IAB-DU of the first IAB node, the first IAB node determines the target LBT parameter based on the first LBT parameter.

[0134] When the multiplexing scheduling is configured on the HARD resources of the IAB-DU of the first IAB node, the first IAB node determines the target LBT parameter according to the second LBT parameter.

[0135] Scenario 1

[0136] If the multiplexing scheduling mode that the IAB-MT and IAB-DU send simultaneously is configured on the HARD of the parent IAB-DU, then the CAPC and contention window length in the LBT parameters of the COT used to initiate multiplexing scheduling can be determined by the first IAB node based on its IAB-MT.

[0137] As an optional implementation, the first IAB node determines the target LBT parameters based on the first LBT parameters, including at least one of the following:

[0138] When the IAB-MT of the first IAB node actively initiates COT, the IAB-MT of the first IAB node autonomously determines the target LBT parameters.

[0139] When the IAB-MT of the first IAB node receives the first indication information from the parent IAB-DU, the IAB-MT of the first IAB node determines the target LBT parameters based on the first indication information and the uplink transmission status, wherein the first indication information is used to indicate a portion of the parameters in the target LBT parameters.

[0140] In this implementation, if the COT is initiated by the IAB-MT of the first IAB node, the LBT parameter can be determined based on the CAPC value corresponding to the data to be transmitted by the IAB-MT of the first IAB node and the uplink transmission status (such as the number of successful or failed uplink Hybrid Automatic Repeat Requests (HARQ) of the IAB-MT (ULHARQ A / N statistics). If the IAB-MT of the first IAB node receives an indication of the LBT type and / or CAPC value from the parent IAB-DU, the LBT parameter is determined in accordance with the received indication and the uplink transmission status (such as ULHARQ A / N statistics).

[0141] It is worth noting that this implementation method can also be combined with the consistent LBT in Implementation Method 1. For example, the IAB-MT of the first IAB node performs the primary LBT before the target transmission time position, and the IAB-DU of the first IAB node performs the secondary LBT before the target transmission time position. Another example is that the IAB-DU of the first IAB node performs the consistent LBT with the same CAPC value and contention window as the IAB-MT of the first IAB node.

[0142] As an optional implementation, when the first IAB node determines the target LBT parameters based on the first LBT parameters, the wireless node performs LBT based on the target LBT parameters, including at least one of the following:

[0143] The IAB-MT of the first IAB node performs primary LBT based on the target LBT parameters, and the IAB-DU of the first IAB node performs secondary LBT based on the target LBT parameters;

[0144] The IAB-MT and IAB-DU of the first IAB node perform LBT based on the target LBT parameters, respectively.

[0145] Specifically, the IAB-MT and IAB-DU of the first IAB node perform LBT based on the target LBT parameters, indicating that the IAB-MT and IAB-DU of the first IAB node perform consistent LBT based on the same LBT parameters.

[0146] The IAB-MT of the first IAB node performs primary LBT based on the target LBT parameters, and the IAB-DU of the first IAB node performs secondary LBT based on the target LBT parameters, indicating that the IAB-MT and IAB-DU of the first IAB node perform primary-secondary consistent LBT based on the target LBT parameters.

[0147] Scenario 2

[0148] If the multiplexing scheduling mode for simultaneous transmission of IAB-MT and IAB-DU is configured on the HARD resource of the IAB-DU of the first IAB node, then the CAPC and contention window length in the LBT parameters of the COT used to initiate multiplexing scheduling can be determined by the first IAB node based on the CAPC value and transmission status (such as its UL HARQ A / N statistics) corresponding to the data to be transmitted by its IAB-DU.

[0149] Similar to scenario one described above, this implementation can also be combined with the consistent LBT in scenario one. For example, the IAB-DU of the first IAB node performs the primary LBT before the target transmission time position, and the IAB-MT of the first IAB node performs the secondary LBT before the target transmission time position. Another example: the IAB-MT of the first IAB node performs the consistent LBT with the same CAPC value and contention window as the IAB-DU of the first IAB node.

[0150] As an optional implementation, when the first IAB node determines the target LBT parameters based on the second LBT parameters, the wireless node performs LBT based on the target LBT parameters, including at least one of the following:

[0151] The IAB-DU of the first IAB node performs primary LBT based on the target LBT parameters, and the IAB-MT of the first IAB node performs secondary LBT based on the target LBT parameters;

[0152] The IAB-MT and IAB-DU of the first IAB node perform LBT based on the target LBT parameters, respectively.

[0153] This implementation method is similar to the combination of Case 1 and Implementation 1 in terms of consistency LBT, and will not be described again here.

[0154] It should be noted that in practical applications, if the CAPC value indicated by the parent IAB node is different from the CAPC value in the LBT parameters, or if the parent IAB node does not indicate a CAPC value, the IAB-MT can also report the CAPC value in the LBT parameters to the parent IAB-DU so that the parent IAB-DU can schedule the first IAB node.

[0155] Implementation Method 5

[0156] The first IAB node determines that LBT will be performed by one of IAB-MT and IAB-DU. This can be understood as follows: when the first IAB node is configured with a multiplexing scheduling mode in which IAB-MT and IAB-DU are sent simultaneously, only one of IAB-DU and IAB-MT of the first IAB node will perform LBT, and the other will not need to perform LBT. Moreover, the COT initiated by the party performing LBT can be shared between IAB-DU and IAB-MT of the first IAB node.

[0157] In other words, when LBT is performed by one of the IAB-MT and IAB-DU of the first IAB node, the wireless node performs LBT based on the target LBT parameters, including at least one of the following:

[0158] The IAB-MT or IAB-DU of the first IAB node executes LBT and initiates COT, and the IAB-MT and IAB-DU of the first IAB node share the initiated COT.

[0159] In practice, the LBT can be performed by either the IAB-MT or the IAB-DU of the first IAB node in at least one of the following ways:

[0160] Scenario 1

[0161] The first IAB node determines whether IAB-MT or IAB-DU will execute LBT and initiate COT based on the configuration of the central control unit (CU).

[0162] Optionally, the LBT method provided in this application further includes:

[0163] The first IAB node receives the first configuration information sent by the CU;

[0164] Based on the first configuration information, the first IAB node determines that the LBT and COT will be executed by the IAB-MT or IAB-DU of the first IAB node.

[0165] In specific implementation, the aforementioned first configuration information can be the F1-AP protocol or the RRC protocol. For example, the CU node can configure the IAB-DU through the F1-AP protocol and the IAB-MT through the RRC protocol. No specific limitations are made here.

[0166] In this implementation, the CU designates one of IAB-MT and IAB-DU to enable the designated IAB-MT or IAB-DU to perform LBT and initiate COT.

[0167] Scenario 2

[0168] The first IAB node can also determine whether LBT should be performed by IAB-MT or IAB-DU based on the resource configuration of the multiplexing schedule sent simultaneously by IAB-MT and IAB-DU.

[0169] Optionally, the IAB-MT or IAB-DU of the first IAB node executes LBT and initiates COT, including:

[0170] When the multiplexing scheduling is configured on the HARD resources of the IAB-DU of the first IAB node, the IAB-DU of the first IAB node performs LBT and initiates COT.

[0171] When the multiplexing scheduling is configured on the HARD resources of the IAB-MT of the first IAB node, the IAB-MT of the first IAB node performs LBT and initiates COT.

[0172] In other words, if the multiplexing scheduling mode is configured on the HARD resources of the IAB-DU of the first IAB node, the IAB-DU of the first IAB node will execute LBT to initiate COT, while the IAB-MT will not execute LBT; conversely, if the multiplexing scheduling mode is configured on the HARD resources of the IAB-MT of the first IAB node, the IAB-MT of the first IAB node will execute LBT to initiate COT, while the IAB-DU will not execute LBT.

[0173] In this case, the first IAB node can autonomously determine the party that performs LBT based on the configuration of the multiplexing scheduling resources, so that the party performing LBT matches the configuration of the multiplexing scheduling resources, thereby making the COT obtained by the party performing LBT usable in the multiplexing scheduling mode.

[0174] It should be noted that, in this embodiment, the CAPC value, the received power threshold, and other parameters in the LBT parameters can be determined using any of the methods described in embodiments one to four above, and will not be elaborated further here.

[0175] Scenario 3

[0176] The first IAB node can determine, according to the instructions of the parent IAB node, which party in IAB-MT and IAB-DU will perform LBT to initiate COT.

[0177] Optionally, the IAB-MT or IAB-DU of the first IAB node executes LBT and initiates COT, including:

[0178] When the IAB-MT of the first IAB node receives the LBT parameters sent by the parent IAB node, the IAB-MT of the first IAB node performs LBT and initiates COT.

[0179] If the IAB-MT of the first IAB node does not receive the LBT parameters sent by the parent IAB node, the IAB-DU of the first IAB node shall perform the LBT and initiate the COT, or the first IAB node shall determine whether the IAB-MT or IAB-DU of the first IAB node shall perform the LBT and initiate the COT.

[0180] The situation where IAB-MT receives LBT parameters from the parent IAB node indicates that IAB-MT has received an indication from the parent IAB-DU regarding the LBT type that can be used in the aforementioned multiplexing scheduling mode. In this case, the LBT parameters can be determined first according to the indication from the parent IAB-DU, or the IAB-MT can execute the LBT and initiate COT according to the indication from the parent IAB-DU.

[0181] Accordingly, if the IAB-MT does not receive the LBT parameters sent by the parent IAB node, the IAB-DU can perform the LBT and initiate the COT, or the first IAB node can determine whether the IAB-MT or IAB-DU of the first IAB node can perform the LBT and initiate the COT.

[0182] In this implementation, the parent IAB node can indicate the relevant indication of the LBT type that can be used in the above-mentioned multiplexing scheduling mode to the first IAB node, and determine the LBT parameters according to the indication of the parent IAB-DU, or the IAB-MT can execute the LBT and initiate COT according to the indication of the parent IAB-DU. Under the premise of initiating COT that can be used in the above-mentioned multiplexing scheduling mode, the calculation process of the first IAB node can be saved.

[0183] Scenario 4

[0184] The first IAB node can determine the execution subject and LBT parameters based on whether there is data to be transmitted in IAB-MT and / or IAB-DU.

[0185] Optionally, if the IAB-MT of the first IAB node has information to be transmitted, but the IAB-DU of the first IAB node has no information to be transmitted, the target LBT parameter is determined by the IAB-MT of the first IAB node, and LBT is performed based on the target LBT parameter.

[0186] If the IAB-DU of the first IAB node has information to be transmitted, but the IAB-MT of the first IAB node has no information to be transmitted, the IAB-DU of the first IAB node autonomously determines the target LBT parameters and performs LBT based on the target LBT parameters.

[0187] In an optional implementation, when the IAB-MT has information to be transmitted but the IAB-DU of the first IAB node has no information to be transmitted, the determination of the target LBT parameters by the IAB-MT can be understood as the IAB-MT using any of the methods in the above implementations one to four to determine the target LBT.

[0188] For example, determining the target LBT parameters by the IAB-MT of the first IAB node and performing LBT based on the target LBT parameters includes at least one of the following:

[0189] When the IAB-MT of the first IAB node receives the LBT parameters sent by the parent IAB-DU, the IAB-MT of the first IAB node determines the target LBT parameters based on the LBT parameters and its own HARQ transmission status.

[0190] If the IAB-MT of the first IAB node does not receive the LBT parameters sent by the parent IAB-DU, the IAB-MT of the first IAB node determines the target LBT parameters based on the 5QI corresponding to its own information to be transmitted and its own HARQ transmission status.

[0191] In this embodiment, when the IAB-MT has information to be transmitted but the IAB-DU of the first IAB node has no information to be transmitted, the IAB-MT first determines the target LBT parameter based on the instruction of the parent IAB-DU and its own transmission status; only when the IAB-MT does not receive the instruction of the parent IAB-DU does it determine the target LBT based on the 5QI corresponding to its own information to be transmitted and its own transmission status.

[0192] In another alternative implementation, when the IAB-DU has information to be transmitted but the IAB-MT of the first IAB node has no information to be transmitted, determining the target LBT parameter by the IAB-DU can be understood as the IAB-DU using any of the methods in implementations one to four above to determine the target LBT.

[0193] For example, IAB-DU determines the LBT parameters and performs LBT based on the 5QI corresponding to its data to be transmitted and its own HARQ transmission status.

[0194] In this implementation, the target LBT parameters are determined firstly based on the transmission conditions of the data to be transmitted and the corresponding channel, such as the signal transmission quality. LBT is then performed based on these target LBT parameters, enabling the initiation of a COT that matches the priority, transmission time, and signal transmission quality of the data to be transmitted.

[0195] Of course, if both the IAB-MT and IAB-DU of the first IAB node have uplink data to be transmitted, any of the methods described in Implementation Methods 1 to 4 above can be used to determine the target LBT, which will not be elaborated here.

[0196] It is worth noting that in practical applications, the priority relationship between the indications of IAB-MT, IAB-DU, and the parent IAB node can be set so that the LBT parameters are determined by IAB-DU first, or by IAB-MT first, or by the parent IAB node first, etc.

[0197] For example, assuming that the priority of the IAB-DU is higher than the priority of the indication of the parent IAB node, when the IAB-MT of the first IAB node receives the relevant indication of the LBT type applicable to the above-mentioned multiplexing scheduling mode from the parent IAB-DU, if the IAB-DU of the first IAB node has downlink data to be transmitted, the IAB-DU can determine the LBT parameters based on its own downlink data to be transmitted, without ignoring the LBT parameter indication sent by the parent IAB-DU received by the IAB-MT.

[0198] Optionally, the LBT method provided in this application embodiment further includes:

[0199] The first IAB node sends the COT corresponding to the target LBT parameter to the parent IAB node.

[0200] In this implementation, when the target LBT parameter is determined autonomously by the first IAB node, and the initiated COT is different from the COT corresponding to the LBT parameter indicated by the parent IAB-DU, or the parent IAB-DU does not indicate any LBT parameter, the first IAB node reports the COT information to the parent IAB node so that the parent IAB node can schedule the first IAB node according to the COT.

[0201] As an optional implementation, the first IAB node autonomously determines the target LBT parameters, including:

[0202] At least one of the IAB-MT and IAB-DU of the first IAB node determines the LBT backoff window length based on its own uplink transmission status;

[0203] The first IAB node determines the contention window length based on the backoff window length of at least one of IAB-MT and IAB-DU.

[0204] In practice, IAB-MT and IAB-DU can determine their respective LBT backoff window lengths based on their own uplink transmission status.

[0205] Of course, the LBT backoff window length can also be determined by either IAB-MT or IAB-DU based on the uplink transmission status of at least one of IAB-MT and IAB-DU.

[0206] The method for determining the backoff window length of the LBT described above can be applied to any of the embodiments one to five above, and one of IAB-MT and IAB-DU used to determine the backoff window length of the LBT can be one of the embodiments one to five above, satisfying at least one of the following conditions:

[0207] When IAB-MT and IAB-DU perform master-slave consistency LBT, the side performing the master LBT is used to determine the backoff window length of the LBT.

[0208] In IAB-MT and IAB-DU, when only one is used to determine the target LBT parameters, that one is used to determine the LBT backoff window length.

[0209] In IAB-MT and IAB-DU, when only one is used to perform LBT, that party is used to determine the backoff window length of LBT.

[0210] Optionally, at least one of the IAB-MT and IAB-DU of the first IAB node determines the LBT backoff window length based on its own uplink transmission status, including at least one of the following:

[0211] The backoff window length of the LBT is determined based on the average HARQ transmission probability of the IAB-MT and IAB-DU of the first IAB node.

[0212] The backoff window length of the LBT is determined based on the larger of the HARQ transmission probabilities of the IAB-MT and IAB-DU of the first IAB node.

[0213] Based on the HARQ transmission probability of the target module in the IAB-MT and IAB-DU of the first IAB node, the backoff window length of the LBT is determined, wherein the target module includes at least one of the following:

[0214] One of the main LBTs is executed in IAB-MT and IAB-DU;

[0215] One of the LBT parameters is determined from IAB-MT and IAB-DU;

[0216] One of the IAB-MT and IAB-DU performs LBT, and the other of the IAB-MT and IAB-DU does not perform LBT.

[0217] In optional implementation method one, the above-mentioned HARQ transmission probability can be expressed as: the combined transmission error ratio of IAB-MT and IAB-DU over a period of time, for example: HARQ transmission probability = (number of transmission errors of IAB-MT + number of transmission errors of IAB-DU) / (number of transmissions of IAB-MT + number of transmissions of IAB-DU).

[0218] In an optional implementation method two, the HARQ transmission probability can be expressed as the error ratio of the one with more severe transmission errors than the one with more severe transmission errors over a period of time, for example: selecting the larger of (number of transmission errors of IAB-MT / number of transmissions of IAB-MT) and (number of transmission errors of IAB-DU / number of transmissions of IAB-DU) as the HARQ transmission probability.

[0219] Compared to the first optional implementation method, this implementation method has a higher HARQ transmission probability, which results in a longer LBT backoff window and increases the reliability of the LBT process.

[0220] In this embodiment, the uplink transmission status is represented by the transmission probability of HARQ, which quantifies the process of determining the backoff window length of LBT, thereby simplifying the process of determining the backoff window length of LBT.

[0221] In summary, the embodiments of this application enable wireless nodes to initiate COTs that can be used for the multiplexing scheduling when the wireless node is configured for simultaneous transmission of uplink and downlink channels. Specifically, this includes how to determine and resolve channel usage conflicts, how to determine the CAPC of LBT, and when the wireless node has a parent node, it also solves the coordination between the wireless node and the parent node, so that the wireless node can support the above-mentioned multiplexing scheduling even when it is operating on an unlicensed frequency.

[0222] It should be noted that the LBT method provided in this application embodiment can be executed by an LBT device, or by a control module within the LBT device for executing the LBT method. This application embodiment uses the execution of the LBT method by an LBT device as an example to illustrate the LBT device provided in this application embodiment.

[0223] Please see Figure 4 This application also provides an LBT device, the LBT device 400 comprising:

[0224] The first determining module 401 is used to determine the target LBT parameter, wherein the target LBT parameter includes at least one of the first LBT parameter and the second LBT parameter;

[0225] The execution module 402 is used to perform LBT on at least one of the first target transmission channel resources and the second target transmission channel resources based on the target LBT parameters.

[0226] Optionally, the first target transmission channel resource is the time-frequency resource transmitted by the wireless node to the first neighboring wireless node; and / or

[0227] The second target transmission channel resource is the time-frequency resource transmitted by the wireless node to the second neighboring wireless node; and / or

[0228] The first target transmission channel resource and the second target transmission channel resource are used by the wireless node for multiplexing transmission in at least one domain of the time domain, frequency domain, and spatial domain.

[0229] It should be noted that the LBT device 400 provided in this application can be a device in an IAB node or a device in a relay terminal, for example: a relay terminal equipped with an SL, wherein the SL is used to provide a sidelink relay service between a remote terminal and a base station node; and / or, the first adjacent wireless node is a base station device, a relay terminal, or a remote terminal; and / or the second adjacent wireless node is a base station device, a relay terminal, or a remote terminal. The following embodiments use the example of the LBT device 400 being a device in an IAB node for illustration, which does not constitute a specific limitation.

[0230] Optionally, the LBT device is an LBT device in the first IAB node, the first IAB node is configured with multiplexing scheduling of IAB-MT and IAB-DU, the first LBT parameter is the LBT parameter corresponding to the IAB-MT, and the second LBT parameter is the LBT parameter corresponding to the IAB-DU.

[0231] Optionally, the LBT parameters include at least one of the following:

[0232] Competition window length;

[0233] Receive power threshold;

[0234] CAPC;

[0235] LBT type;

[0236] The received power threshold is used to determine whether at least one of the first target transmit channel resource and the second target transmit channel resource is available.

[0237] Optionally, the first IAB node performs LBT using at least one of the following LBT modes:

[0238] Consistent LBT, wherein, under the consistent LBT, the IAB-MT and IAB-DU of the first IAB node perform LBT respectively based on the same LBT parameters, or, one of the IAB-MT and IAB-DU performs primary LBT and the other performs secondary LBT;

[0239] Inconsistent LBT: Under the inconsistent LBT, the IAB-MT and IAB-DU of the first IAB node perform LBT based on not exactly the same LBT parameters.

[0240] Execute LBT according to the LBT parameters indicated by the parent IAB node;

[0241] Execute LBT according to the LBT parameters determined based on DU resource allocation;

[0242] LBT is performed by one of the IAB-MT and IAB-DU of the first IAB node.

[0243] Optionally, one of the IAB-MT and IAB-DU performs the primary LBT, and the other performs the secondary LBT;

[0244] The main LBT includes: a complete LBT process prior to the target transmission time position on the first transmission channel resource; the complete LBT process includes: a process of listening to the channel within a first fixed short duration, and a process of listening to the channel within a random duration determined according to pre-configured parameters; the first transmission channel resource is one of the first target transmission channel resource and the second target transmission channel resource corresponding to the IAB-MT or IAB-DU that performs the main LBT;

[0245] The auxiliary LBT includes a short LBT process prior to the target transmission time position on the second transmission channel resource; the short LBT process includes a process of listening to the channel within a second fixed short duration; the second transmission channel resource is one of the first target transmission channel resource and the second target transmission channel resource corresponding to the IAB-MT or IAB-DU that performs the auxiliary LBT.

[0246] Optionally, the first determining module 401 is specifically used for at least one of the following:

[0247] Determine the target LBT parameters based on the indications of the parent IAB node;

[0248] Determine the target LBT parameters based on DU resource allocation;

[0249] Determine the target LBT parameters independently.

[0250] Optionally, when the first IAB node performs a consistent LBT, the first determining module 401 is specifically used for at least one of the following:

[0251] The target CAPC is determined based on the priority of the information to be transmitted by the IAB-MT and IAB-DU of the first IAB node or the 5QI of the logical channel. Both the IAB-MT and IAB-DU of the first IAB node use the target CAPC.

[0252] The target receive power threshold is determined based on the receive power threshold of the IAB-MT and the receive power threshold of the IAB-DU of the first IAB node. Both the IAB-MT and the IAB-DU of the first IAB node use the target receive power threshold.

[0253] Optionally, the first determining module 401 includes:

[0254] The first determining unit is used to determine the respective receive power thresholds of the IAB-MT and IAB-DU of the first IAB node.

[0255] The second determining unit is used to determine the lower of the receive power threshold of IAB-MT and the receive power threshold of IAB-DU as the target receive power threshold; or, to determine the receive power threshold of the one performing the main LBT in IAB-MT and IAB-DU as the target receive power threshold.

[0256] Optionally, in the case where the first IAB node performs inconsistent LBT, the first determining module is specifically used for:

[0257] The LBT parameters of the first IAB node are determined by IAB-MT and IAB-DU respectively.

[0258] The execution module 402 is specifically used for:

[0259] The IAB-MT and IAB-DU of the first IAB node perform LBT before the common target transmission time position based on their respective LBT parameters, and determine their respective COT.

[0260] Optionally, the first determining module 401 is specifically used for:

[0261] When the multiplexing scheduling is configured on the HARD resources of the parent IAB-DU of the first IAB node, the target LBT parameter is determined according to the first LBT parameter;

[0262] When the multiplexing scheduling is configured on the HARD resources of the IAB-DU of the first IAB node, the target LBT parameter is determined according to the second LBT parameter.

[0263] Optionally, the first determining module 401 is specifically used for at least one of the following:

[0264] When the IAB-MT of the first IAB node actively initiates COT, the IAB-MT of the first IAB node autonomously determines the target LBT parameters.

[0265] When the IAB-MT of the first IAB node receives the first indication information from the parent IAB-DU, the IAB-MT of the first IAB node determines the target LBT parameters based on the first indication information and the uplink transmission status, wherein the first indication information is used to indicate a portion of the parameters in the target LBT parameters.

[0266] Optionally, when the first IAB node determines the target LBT parameter based on the first LBT parameter, the execution module 402 is specifically used for at least one of the following:

[0267] The primary LBT is performed by the IAB-MT of the first IAB node based on the target LBT parameters, and the secondary LBT is performed by the IAB-DU of the first IAB node based on the target LBT parameters;

[0268] LBT is performed by IAB-MT and IAB-DU of the first IAB node based on the target LBT parameters;

[0269] When the first IAB node determines the target LBT parameter based on the second LBT parameter, the execution module 402 is specifically used for at least one of the following:

[0270] The primary LBT is performed by the IAB-DU of the first IAB node based on the target LBT parameters, and the secondary LBT is performed by the IAB-MT of the first IAB node based on the target LBT parameters.

[0271] LBT is performed by IAB-MT and IAB-DU of the first IAB node based on the target LBT parameters.

[0272] Optionally, in the case where LBT is performed by one of the IAB-MT and IAB-DU of the first IAB node, execution module 402 is specifically used for at least one of the following:

[0273] The LBT is executed by the IAB-MT or IAB-DU of the first IAB node and the COT is initiated, and the IAB-MT and IAB-DU of the first IAB node share the initiated COT.

[0274] Optionally, the LBT device 400 also includes:

[0275] The receiving module is used to receive the first configuration information sent by the CU through the first IAB node;

[0276] The second determining module is used to determine, based on the first configuration information, whether the LBT is performed by the IAB-MT or IAB-DU of the first IAB node and the COT is initiated.

[0277] Optionally, the IAB-MT or IAB-DU of the first IAB node executes LBT and initiates COT, including:

[0278] When the multiplexing scheduling is configured on the HARD resources of the IAB-DU of the first IAB node, the IAB-DU of the first IAB node performs LBT and initiates COT.

[0279] When the multiplexing scheduling is configured on the HARD resources of the IAB-MT of the first IAB node, the IAB-MT of the first IAB node performs LBT and initiates COT.

[0280] Optionally, the IAB-MT or IAB-DU of the first IAB node executes LBT and initiates COT, including:

[0281] When the IAB-MT of the first IAB node receives the LBT parameters sent by the parent IAB node, the IAB-MT of the first IAB node performs LBT and initiates COT.

[0282] If the IAB-MT of the first IAB node does not receive the LBT parameters sent by the parent IAB node, the IAB-DU of the first IAB node shall perform the LBT and initiate the COT, or the first IAB node shall determine whether the IAB-MT or IAB-DU of the first IAB node shall perform the LBT and initiate the COT.

[0283] Optionally, if the IAB-MT of the first IAB node has information to be transmitted, but the IAB-DU of the first IAB node has no information to be transmitted, the IAB-MT of the first IAB node determines the target LBT parameters and performs LBT based on the target LBT parameters.

[0284] If the IAB-DU of the first IAB node has information to be transmitted, but the IAB-MT of the first IAB node has no information to be transmitted, the IAB-DU of the first IAB node autonomously determines the target LBT parameters and performs LBT based on the target LBT parameters.

[0285] Optionally, the step of determining the target LBT parameters by the IAB-MT of the first IAB node and performing LBT based on the target LBT parameters includes at least one of the following:

[0286] When the IAB-MT of the first IAB node receives the LBT parameters sent by the parent IAB-DU, the IAB-MT of the first IAB node determines the target LBT parameters based on the LBT parameters and its own HARQ transmission status.

[0287] If the IAB-MT of the first IAB node does not receive the LBT parameters sent by the parent IAB-DU, the IAB-MT of the first IAB node determines the target LBT parameters based on the 5QI corresponding to its own information to be transmitted and its own HARQ transmission status.

[0288] Optionally, the first determining module 401 includes:

[0289] The first determining unit is used to determine the backoff window length of the LBT based on the uplink transmission status of at least one of the IAB-MT and IAB-DU of the first IAB node.

[0290] The second determining unit is used to determine the competition window length based on the backoff window length of at least one of IAB-MT and IAB-DU.

[0291] Optionally, the first determining unit is specifically used for at least one of the following:

[0292] The backoff window length of the LBT is determined based on the average HARQ transmission probability of the IAB-MT and IAB-DU of the first IAB node.

[0293] The backoff window length of the LBT is determined based on the larger of the HARQ transmission probabilities of the IAB-MT and IAB-DU of the first IAB node.

[0294] Based on the HARQ transmission probability of the target module in the IAB-MT and IAB-DU of the first IAB node, the backoff window length of the LBT is determined, wherein the target module includes at least one of the following:

[0295] One of the main LBTs is executed in IAB-MT and IAB-DU;

[0296] One of the LBT parameters is determined from IAB-MT and IAB-DU;

[0297] One of the IAB-MT and IAB-DU performs LBT, and the other of the IAB-MT and IAB-DU does not perform LBT.

[0298] Optionally, the LBT device is an LBT device in a relay terminal, and the relay terminal is configured with a side link SL, which is used to provide side link relay service between the remote UE and the base station node.

[0299] The LBT device 400 provided in this embodiment of the application is capable of performing the following: Figure 2 The steps performed by the wireless node in the LBT method embodiment shown are the same and can achieve the same beneficial effects. To avoid repetition, they will not be described again here.

[0300] Optional, such as Figure 5As shown, this application embodiment also provides a communication device 500, including a processor 501, a memory 502, and a program or instructions stored in the memory 502 and executable on the processor 501. For example, when the communication device 500 is a network-side device, the program or instructions executed by the processor 501 implement the various processes of the LBT method embodiment described above and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0301] It is worth noting that the communication device 500 provided in the embodiments of this application can be a terminal device, such as a relay terminal, or it can be a network-side device, such as an IAB node.

[0302] This application also provides a network-side device, including a processor and a communication interface. The processor is used to determine target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter. The communication interface is used to perform LBT on at least one of a first target transmission channel resource and a second target transmission channel resource based on the target LBT parameters. This network-side device embodiment corresponds to the LBT method embodiment executed by the aforementioned wireless node. All implementation processes and methods of the aforementioned method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0303] Specifically, embodiments of this application also provide a network-side device. For example... Figure 6 As shown, the network device 600 includes an antenna 601, a radio frequency (RF) device 602, and a baseband device 603. The antenna 601 is connected to the RF device 602. In the uplink direction, the RF device 602 receives information through the antenna 601 and transmits the received information to the baseband device 603 for processing. In the downlink direction, the baseband device 603 processes the information to be transmitted and sends it to the RF device 602. The RF device 602 processes the received information and transmits it through the antenna 601.

[0304] The aforementioned frequency band processing device can be located in the baseband device 603. The method executed by the network-side device in the above embodiments can be implemented in the baseband device 603, which includes a processor 604 and a memory 605.

[0305] The baseband device 603 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 6 As shown, one of the chips, for example, is a processor 604, which is connected to a memory 605 to call the program in the memory 605 and execute the network device operations shown in the above method embodiment.

[0306] The baseband device 603 may also include a network interface 606 for exchanging information with the radio frequency device 602, such as a common public radio interface (CPRI).

[0307] Specifically, the network-side device in this embodiment of the invention further includes: instructions or programs stored in memory 605 and executable on processor 604, wherein processor 604 calls the instructions or programs in memory 605 to execute... Figure 6 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0308] This application also provides a terminal device, including a processor and a communication interface. The processor is used to determine target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter. The communication interface is used to perform LBT on at least one of a first target transmission channel resource and a second target transmission channel resource based on the target LBT parameters. This terminal device embodiment corresponds to the LBT method embodiment described above when the wireless node is a terminal device (e.g., a relay terminal). All implementation processes and methods of the above method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 7 A schematic diagram of the hardware structure of a terminal device to implement an embodiment of this application.

[0309] The terminal device 700 includes, but is not limited to, at least some of the following components: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, and processor 710.

[0310] Those skilled in the art will understand that the terminal device 700 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 710 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 7 The terminal device structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0311] It should be understood that, in this embodiment, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042. The GPU 7041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0312] In this embodiment, the radio frequency unit 701 receives transmitted data from a base station device, relay terminal, or remote terminal and processes it with the processor 710; additionally, it forwards the transmitted data to another base station device, relay terminal, or remote terminal. Typically, the radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0313] The memory 709 can be used to store software programs or instructions and various data. The memory 709 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 709 may include high-speed random access memory and non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0314] Processor 710 may include one or more processing units; optionally, processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 710.

[0315] The processor 710 is configured to determine target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter;

[0316] Radio frequency unit 701 is used to perform LBT on at least one of the first target transmission channel resource and the second target transmission channel resource based on the target LBT parameters.

[0317] Optionally, the first target transmission channel resource is the time-frequency resource transmitted by the wireless node to the first neighboring wireless node; and / or

[0318] The second target transmission channel resource is the time-frequency resource transmitted by the wireless node to the second neighboring wireless node; and / or

[0319] The first target transmission channel resource and the second target transmission channel resource are used by the wireless node for multiplexing transmission in at least one domain of the time domain, frequency domain, and spatial domain.

[0320] Optionally, the LBT parameters include at least one of the following:

[0321] Competition window length;

[0322] Receive power threshold;

[0323] Channel Access Priority (CAPC)

[0324] LBT type;

[0325] The received power threshold is used to determine whether at least one of the first target transmit channel resource and the second target transmit channel resource is available.

[0326] Optionally, the wireless node is a relay terminal, which is configured with a sidelink SL, the SL being used to provide sidelink relay services between the remote terminal and the base station node; and / or

[0327] The first adjacent wireless node is a base station device, a relay terminal, or a remote terminal; and / or

[0328] The second adjacent wireless node is a base station device, a relay terminal, or a remote terminal.

[0329] It should be noted that the terminal device 700 provided in this application embodiment has the function of forwarding information to be transmitted, which is equivalent to the function of a network-side device. Therefore, the terminal device 700 can also perform functions similar to those of other devices. Figure 6 The various processes executed by the network-side device 600 shown.

[0330] The terminal device 700 provided in this application embodiment can achieve the following: Figure 2The various processes in the method embodiments shown are all capable of achieving the same beneficial effects, and will not be described again here to avoid repetition.

[0331] This application embodiment also provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the above-described... Figure 2 The various processes of the LBT method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0332] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0333] This application embodiment also provides a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement, as described above. Figure 2 The various processes of the LBT method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0334] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0335] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0336] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0337] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A pre-session listening LBT method, characterized in that, The method includes: The wireless node determines the target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter; The wireless node performs LBT on at least one of the first target transmission channel resources and the second target transmission channel resources based on the target LBT parameters; The wireless node is a first integrated access and backhaul (IAB) node. The first IAB node is configured with multiplexing scheduling of the terminal function module (IAB-MT) and the distributed unit module (IAB-DU) of the IAB node. The first LBT parameter is the LBT parameter corresponding to the IAB-MT, and the second LBT parameter is the LBT parameter corresponding to the IAB-DU. The first IAB node performs LBT using at least one of the following LBT modes: A consistent LBT, wherein, under the consistent LBT, one of the IAB-MT and IAB-DU performs the primary LBT and the other performs the secondary LBT; LBT is executed according to the LBT parameters determined based on DU resource allocation.

2. The method according to claim 1, characterized in that: The first target transmission channel resource is the time-frequency resource transmitted by the wireless node to the first neighboring wireless node; and / or The second target transmission channel resource is the time-frequency resource transmitted by the wireless node to the second neighboring wireless node; and / or The first target transmission channel resource and the second target transmission channel resource are used by the wireless node for multiplexing transmission in at least one domain of the time domain, frequency domain, and spatial domain.

3. The method according to claim 1, characterized in that, The LBT parameters include at least one of the following: Competition window length; Receive power threshold; Channel Access Priority (CAPC) LBT type; The received power threshold is used to determine whether at least one of the first target transmit channel resource and the second target transmit channel resource is available.

4. The method according to claim 1, wherein one of the IAB-MT and IAB-DU performs the main LBT and the other performs the auxiliary LBT, characterized in that, The main LBT includes: a complete LBT process prior to the target transmission time position on the first transmission channel resource; the complete LBT process includes: a process of listening to the channel within a first fixed short duration, and a process of listening to the channel within a random duration determined according to pre-configured parameters; the first transmission channel resource is one of the first target transmission channel resource and the second target transmission channel resource corresponding to the IAB-MT or IAB-DU that performs the main LBT; The auxiliary LBT includes a short LBT process prior to the target transmission time position on the second transmission channel resource; the short LBT process includes a process of listening to the channel within a second fixed short duration; the second transmission channel resource is one of the first target transmission channel resource and the second target transmission channel resource corresponding to the IAB-MT or IAB-DU that performs the auxiliary LBT.

5. The method according to claim 1 or 3, characterized in that, The first IAB node determines the target LBT parameters, including at least one of the following: The first IAB node determines the target LBT parameters based on the instructions from the parent IAB node; The first IAB node determines the target LBT parameters based on DU resource allocation; The first IAB node autonomously determines the target LBT parameters.

6. The method according to claim 5, characterized in that, When the first IAB node performs consistent LBT, the first IAB node autonomously determines the target LBT parameters, including at least one of the following: The first IAB node determines the target CAPC based on the priority of the information to be transmitted by the IAB-MT and IAB-DU of the first IAB node or the 5QI of the logical channel. Both the IAB-MT and IAB-DU of the first IAB node use the target CAPC. The first IAB node determines the target receive power threshold based on the receive power threshold of the IAB-MT and the receive power threshold of the IAB-DU of the first IAB node. Both the IAB-MT and the IAB-DU of the first IAB node use the target receive power threshold.

7. The method according to claim 6, characterized in that, The first IAB node determines the target receive power threshold based on the receive power threshold of its IAB-MT and IAB-DU, including: The IAB-MT and IAB-DU of the first IAB node each determine their respective receive power thresholds; The first IAB node determines the lower of the receive power threshold of IAB-MT and IAB-DU as the target receive power threshold; or, the first IAB node determines the receive power threshold of the one performing the primary LBT in IAB-MT and IAB-DU as the target receive power threshold.

8. The method according to claim 5, characterized in that, The first IAB node determines the target LBT parameters based on DU resource allocation, including: When the multiplexing scheduling is configured on the HARD resources of the parent IAB-DU of the first IAB node, the first IAB node determines the target LBT parameter based on the first LBT parameter. When the multiplexing scheduling is configured on the HARD resources of the IAB-DU of the first IAB node, the first IAB node determines the target LBT parameter according to the second LBT parameter.

9. The method according to claim 8, characterized in that, The first IAB node determines the target LBT parameters based on the first LBT parameters, including at least one of the following: When the IAB-MT of the first IAB node actively initiates COT, the IAB-MT of the first IAB node autonomously determines the target LBT parameters. When the IAB-MT of the first IAB node receives the first indication information from the parent IAB-DU, the IAB-MT of the first IAB node determines the target LBT parameters based on the first indication information and the uplink transmission status, wherein the first indication information is used to indicate a portion of the parameters in the target LBT parameters.

10. The method according to claim 8, characterized in that, When the first IAB node determines the target LBT parameters based on the first LBT parameters, the wireless node performs LBT based on the target LBT parameters, including: The IAB-MT of the first IAB node performs primary LBT based on the target LBT parameters, and the IAB-DU of the first IAB node performs secondary LBT based on the target LBT parameters; When the first IAB node determines the target LBT parameters based on the second LBT parameters, the wireless node performs LBT based on the target LBT parameters, including: The IAB-DU of the first IAB node performs primary LBT based on the target LBT parameters, and the IAB-MT of the first IAB node performs secondary LBT based on the target LBT parameters.

11. The method according to claim 5, characterized in that, The first IAB node autonomously determines the target LBT parameters, including: At least one of the IAB-MT and IAB-DU of the first IAB node determines the LBT backoff window length based on its own uplink transmission status; The first IAB node determines the contention window length based on the backoff window length of at least one of IAB-MT and IAB-DU.

12. The method according to claim 11, characterized in that, At least one of the IAB-MT and IAB-DU of the first IAB node determines the LBT backoff window length based on its own uplink transmission status, including at least one of the following: The backoff window length of the LBT is determined based on the average HARQ transmission probability of the IAB-MT and IAB-DU of the first IAB node. The backoff window length of the LBT is determined based on the larger of the HARQ transmission probabilities of the IAB-MT and IAB-DU of the first IAB node. Based on the HARQ transmission probability of the target module in the IAB-MT and IAB-DU of the first IAB node, the backoff window length of the LBT is determined, wherein the target module includes at least one of the following: One of the main LBTs is executed in IAB-MT and IAB-DU; One of the LBT parameters is determined from IAB-MT and IAB-DU; One of the IAB-MT and IAB-DU performs LBT, and the other of the IAB-MT and IAB-DU does not perform LBT.

13. A pre-session listening (LBT) device, characterized in that, include: A first determining module is configured to determine target LBT parameters, wherein the target LBT parameters include at least one of a first LBT parameter and a second LBT parameter; The execution module is configured to perform LBT on at least one of the first target transmission channel resource and the second target transmission channel resource based on the target LBT parameters; The LBT device is the LBT device in the first integrated access and backhaul IAB node. The first IAB node is configured with the multiplexing scheduling of the terminal function module IAB-MT and the distributed unit module IAB-DU of the IAB node. The first LBT parameter is the LBT parameter corresponding to the IAB-MT, and the second LBT parameter is the LBT parameter corresponding to the IAB-DU. The first IAB node performs LBT using at least one of the following LBT modes: A consistent LBT, wherein, under the consistent LBT, one of the IAB-MT and IAB-DU performs the primary LBT and the other performs the secondary LBT; LBT is executed according to the LBT parameters determined based on DU resource allocation.

14. A network-side device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the pre-session listening (LBT) method as described in any one of claims 1 to 12.

15. A terminal device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the pre-session listening (LBT) method as described in any one of claims 1 to 12.

16. A readable storage medium, characterized in that, The program or instructions are stored on the readable storage medium, and when executed by a processor, the program or instructions implement the steps of the pre-session listening (LBT) method as described in any one of claims 1 to 12.

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