Method for determining channel access priority class (CAPC) and network-side device

Abstract

The application discloses a channel access priority CAPC determination method and a network side device, and belongs to the technical field of communication. The CAPC determination method of the embodiment of the application comprises the following steps: a first integrated access and backhaul IAB node acquires CAPC associated parameters; the first IAB node determines a target CAPC value based on the CAPC associated parameters; wherein the CAPC associated parameters are determined according to at least one of the following: information related to an IAB node terminal function module IAB-MT of the first IAB node; information related to an IAB node distributed unit module IAB-DU of the first IAB node; and indication information from a parent IAB node of the first IAB node.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a method for determining a channel access priority class (CAPC) and a network side device. BACKGROUND

[0002] In an existing protocol, a channel access priority class (CAPC) performing listen before talk (LBT) is determined according to a 5G QoS identifier (5G QoS Identifier, 5QI) of a logical channel where data to be transmitted is located; and the CAPC of a medium access control (MAC) control element (CE) and radio resource control (RRC) signaling is also explicitly specified.

[0003] However, for an integrated access and backhaul (IAB) network (also referred to as a self-backhaul network), the above rules are not applicable to determine the CAPC, for example: if the 5QI of an input logical channel (i.e. input logical channel or input backhaul logical channel (such as a backhaul radio link control channel (BH RLC Channel))) and an output logical channel (i.e. output logical channel or output BH RLC Channel) are inconsistent, the intermediate node will not know the 5QI of the forwarded data, and thus cannot accurately determine the CAPC.

[0004] As can be seen from the above, the transmitting node in the IAB network cannot accurately determine the CAPC of the data, thus not meeting the regulations for unlicensed frequency use management, affecting the sharing and use of unlicensed frequencies, and thus reducing the use efficiency of unlicensed frequencies. SUMMARY

[0005] Embodiments of the present application provide a method for determining a CAPC and a network side device, which can solve the problem that the transmitting node in the IAB network cannot accurately determine the CAPC value of the information to be transmitted.

[0006] In a first aspect, a method for determining a CAPC is provided, the method comprising:

[0007] The first IAB node acquires an associated parameter of the CAPC;

[0008] determine a target CAPC value based on the associated parameters of the CAPC;

[0009] wherein the associated parameters of the CAPC are determined according to at least one of:

[0010] information related to an IAB-MT of the first IAB node;

[0011] information related to an IAB-DU of the first IAB node;

[0012] indication information from a parent IAB node of the first IAB node.

[0013] In a second aspect, a device for determining a CAPC is provided, comprising:

[0014] an obtaining module configured to obtain associated parameters of a CAPC;

[0015] a determining module configured to determine a target CAPC value based on the associated parameters of the CAPC;

[0016] wherein the associated parameters of the CAPC are determined according to at least one of:

[0017] information related to an IAB-MT of the first IAB node;

[0018] information related to an IAB-DU of the first IAB node;

[0019] indication information from a parent IAB node of the first IAB node.

[0020] In a third aspect, a network-side device is provided, which comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, and the program or instruction, when executed by the processor, implements the steps of the method according to the first aspect.

[0021] In a fourth aspect, a network-side device is provided, which comprises a processor and a communication interface, wherein the communication interface is configured to obtain associated parameters of a CAPC, and the processor is configured to determine a target CAPC value based on the associated parameters of the CAPC.

[0022] wherein the associated parameters of the CAPC are determined according to at least one of:

[0023] information related to an IAB-MT of the first IAB node;

[0024] information related to an IAB-DU of the first IAB node;

[0025] indication information from a parent IAB node of the first IAB node.

[0026] In a fifth aspect, a readable storage medium is provided, and the readable storage medium stores a program or instructions, and the program or instructions are executed by a processor to implement the steps of the method in the first aspect.

[0027] In a sixth aspect, a chip is provided, and the chip includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is configured to run a program or instructions to implement the method in the first aspect.

[0028] In a seventh aspect, a computer program / program product is provided, and the computer program / program product is stored in a non-volatile storage medium, and the program / program product is executed by at least one processor to implement the steps of the CAPC determination method in the first aspect.

[0029] In the embodiments of the present application, the first IAB node in the IAB network can determine the associated parameters of the CAPC according to the information related to the IAB-MT and / or the information related to the IAB-DU and / or the indication information from the parent IAB node, and determine the target CAPC value according to the associated parameters of the CAPC, so that the target CAPC value meets the usage regulation of the unlicensed frequency when the IAB network operates in the unlicensed frequency band, and the more accurate LBT result can be obtained when the LBT is initiated according to the target CAPC value, which facilitates the sharing and use of the unlicensed frequency, and further improves the usage efficiency of the unlicensed frequency. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1a is a structure diagram of an IAB network to which the present application can be applied;

[0031] Figure 1b is a structure diagram of a terminal function module (Mobile Termination, MT) - Distributed Unit module (Distributed Unit, DU) of an IAB system;

[0032] Figure 2 is a flowchart of a CAPC determination method provided in the embodiments of the present application;

[0033] Figure 3 is a structure diagram of a CAPC determination device provided in the embodiments of the present application;

[0034] Figure 4 is a structure diagram of a communication device provided in the embodiments of the present application;

[0035] Figure 5 is a structure diagram of a network side device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0037] The terms “first”, “second”, and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by “first”, “second” are generally a category, and are not limited to the number of objects, for example, the first object can be one or more. In addition, “and / or” in the specification and claims means at least one of the connected objects, and the character “ / ” generally represents an “or” relationship between the front and rear associated objects.

[0038] It is worth noting that the technology described in the embodiments of the present application is 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 the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, and can also be used in other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems.

[0039] The IAB system is a technology being standardized in New Radio (NR) Rel-16, and by introducing the IAB system, the situation that the wired transmission network is not deployed well when the access points are densely deployed can be solved. That is, when there is no wired transmission network, the access point can rely on the wireless network for data backhaul. The first IAB node performing the CAPC determination method provided in the embodiments of the present application can be any sending or forwarding IAB node in the IAB system.

[0040] Of course, the first IAB node described above can also be a relay UE, which can forward data between another terminal device or a network side device through a Sidelink Relay function, and the CAPC determination method provided in the embodiments of the present application can also be used for CAPC determination of Sidelink Relay unlicensed frequency backhaul. For ease of illustration, in the following embodiments, the first IAB node is taken as an IAB node in the IAB network as an example for illustration, which does not constitute a specific limitation.

[0041] When NR operates in unlicensed frequency, before transmitting on a certain channel, the transmitter (UE or gNB) should detect the channel according to the LBT procedure to determine whether the channel is available. The specific method is: the transmitter measures the received power on the channel, and if the received power is higher than a preset value (the preset value is used to determine whether it is in an occupied state), then the channel will be determined as an occupied state. Conversely, the channel will be determined as an unoccupied state, and can be used for NR signal transmission.

[0042] Currently, there are multiple types of LBT. For the transmission of PUSCH and PDSCH, gNB / UE can use Category 4 LBT to initiate a Channel Occupation Time (COT), at this time, gNB and UE can share this COT to transmit data within the COT. When performing Category 4 LBT, the transmitter (gNB / UE) can determine different CAPC according to different service types, and use the CAPC to determine the backoff window length of LBT, so that the maximum length of the COT initiated according to different CAPC values is different. Specifically, the maximum channel occupation time (MCOT) initiated by LBT according to different CAPC values is different. In general, the higher the channel access priority, the shorter the maximum channel occupation time initiated. At the same time, the COT initiated using a CAPC value x can only allow logical channels (LCHs) with higher channel access priority (i.e., CAPC value ≤ x) to use the COT for data transmission.

[0043] In the related art, when the IAB node has data to be transmitted, the CAPC of the LBT performed by the IAB node is determined according to the 5QI of the logical channel in which the data to be transmitted is located, for example, as shown in Table 1 below:

[0044] Table 1

[0045]

[0046]

[0047] It is worth noting that, as in Table 1 above, the smaller the value of CAPC, the higher the channel access priority.

[0048] Specifically, according to the mapping between the 5QI of the logical channel carrying data and the CAPC value as shown in Table 1 above, the CAPC value corresponding to the 5QI of the logical channel of the data to be transmitted can be determined. In addition, when there are multiple logical channels of data in one MAC protocol data unit (PDU), the maximum CAPC (i.e., the lowest channel access priority) among the corresponding CAPC values of the multiple logical channels is the CAPC value for performing LBT.

[0049] In addition, for MAC CE and RRC signaling, the CAPC value is determined according to the channel access priority pre-configured by the MAC CE and RRC signaling. For example, the RRC signaling corresponds to the highest priority; when there is only a MAC control element (CE) in the MAC PDU, the LBT is performed using the CAPC value corresponding to the MAC CE with the highest channel access priority (i.e., the smallest CAPC value) among the MAC CEs; the recommended bitrate (Recommended Bitrate) MAC CE corresponds to the lowest priority; and the information carried by the common control channel corresponds to the highest priority.

[0050] However, there are still some cases where the CAPC cannot be determined, for example:

[0051] Case 1

[0052] In an IAB network, if the 5QI of the input logical channel (i.e., input logical channel or input BH RLC Channel) and the 5QI of the output logical channel (i.e., output logical channel or output BH RLC Channel) are inconsistent, the intermediate IAB node does not know the 5QI of the forwarded data, and thus cannot determine the CAPC according to the 5QI of the forwarded data.

[0053] Case 2

[0054] With the development of communication technology, some new data / signaling types are introduced in the IAB network, such as backhaul adaptation protocol (BAP) control data unit (i.e., BAP control PDU) and F1 control information (i.e., F1 signaling) between the central control unit (CU) and the DU, for which the CAPC is not determined.

[0055] In the embodiments of the present application, the first IAB node can obtain the associated parameters of the CAPC according to at least one of the IAB-MT related information, the IAB-DU related information, and the indication information of the parent IAB node, and determine the target CAPC value according to the associated parameters of the CAPC, so that the first IAB node can accurately determine the target CAPC value even in the above cases where the CAPC cannot be determined.

[0056] The determination method of the CAPC provided by the embodiments of the present application will be described in detail in combination with the drawings and some embodiments and their application scenarios.

[0057] Figure 1a A block diagram of an IAB system to which the embodiments of the present application can be applied is shown. As shown in FIG. 1, the IAB system includes an IAB-donor (IAB-donor) and an IAB-node (IAB-node). Figure 1aAs shown, an IAB system can include: an access IAB node 11 (i.e., Access IAB node), an intermediate IAB node 12 (i.e., Intermediate IAB node), and a donor IAB node 13 (i.e., Donor IAB node), wherein the donor IAB node 13 can be connected with a wired transmission network.

[0058] As shown, in addition to the donor IAB node 13, other IAB nodes can include a DU and a MT. By means of the MT, an access point (i.e., IAB node) can find an upstream access point (i.e., parent IAB node) and establish a wireless connection with the DU of the upstream access point, which is referred to as a backhaul link. After an IAB node establishes a complete backhaul link, the IAB node opens its DU function, and the DU provides cell service, i.e., the DU can provide access service for the terminal 14. A self-backhaul loop includes a donor IAB node, which is connected with other network side devices through a wired connection. Figure 1a 1b As shown, in addition to the donor IAB node 13, other IAB nodes can include a DU and a MT. By means of the MT, an access point (i.e., IAB node) can find an upstream access point (i.e., parent IAB node) and establish a wireless connection with the DU of the upstream access point, which is referred to as a backhaul link. After an IAB node establishes a complete backhaul link, the IAB node opens its DU function, and the DU provides cell service, i.e., the DU can provide access service for the terminal 14. A self-backhaul loop includes a donor IAB node, which is connected with other network side devices through a wired connection.

[0059] The terminal 14 can also be referred to as a terminal device or a user terminal (UE), which can be a mobile phone, a tablet personal computer (Tablet PC), a laptop computer (also referred to as a notebook computer), a personal digital assistant (PDA), a palm computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), a wearable device, or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), etc. The wearable device includes a smart watch, a bracelet, a headset, glasses, etc., which are not limited herein.

[0060] In addition, as shown, in a self-backhaul loop, the DUs of all IAB nodes are connected to one CU node, and the DUs are configured by the one node through an F1-AP protocol. The CU configures the MTs through a radio resource control (RRC) protocol. Figure 1b The method for determining CAPC provided by the embodiments of the present application can be used in an IAB system as shown in

[0061] Figure 1a ​​Any transmitting or forwarding node in the embodiments shown, which can be an access IAB node 11, a forwarding IAB node 12 or a donor IAB node 13 as shown in Figure 1a may specifically include at least one of the IAB-MT and the IAB-DU in the access IAB node 11 and the forwarding IAB node 12 and the IAB-DU in the donor IAB node 13.

[0062] Referring to Figure 2 The CAPC determination method provided by the embodiments of the present application can include the following steps:

[0063] Step 201, the first IAB node acquires the associated parameters of the CAPC; wherein the associated parameters of the CAPC are determined according to at least one of the following:

[0064] information related to the IAB-MT of the first IAB node;

[0065] information related to the IAB-DU of the first IAB node;

[0066] indication information from the parent IAB node of the first IAB node.

[0067] In the first optional implementation, the above-mentioned IAB-MT related information can include at least one of the channel access priority information related to the to-be-transmitted information of the IAB-MT (which can also be referred to as the channel access priority related information of the to-be-transmitted information of the IAB-MT) and the uplink Hybrid Automatic Repeat Request (HARQ) transmission error statistical information of the IAB-MT.

[0068] Wherein, the above-mentioned to-be-transmitted information can include at least one of to-be-transmitted data, to-be-transmitted signaling, a data unit carrying to-be-transmitted data or to-be-transmitted signaling, and accordingly, the above-mentioned channel access priority information related to the to-be-transmitted information of the IAB-MT can be understood as the priority information of the to-be-transmitted information, the priority information of the logical channel corresponding to the to-be-transmitted information, the 5QI information of the input logical channel or the input backhaul logical channel of the to-be-transmitted information; the 5QI information of the output logical channel or the output backhaul logical channel of the to-be-transmitted information; the channel access priority related information carried in the to-be-transmitted information.

[0069] And the above-mentioned uplink HARQ transmission error statistical information of the IAB-MT can be used to represent the uplink transmission status of the IAB-MT, so as to dynamically adjust the target CAPC value according to the uplink transmission status of the IAB-MT, so that the LBT performed by the IAB-MT and the COT initiated by the IAB-MT are more matched with the uplink transmission status of the IAB-MT.

[0070] In the second optional implementation, corresponding to the IAB-MT related information, the IAB-DU related information can include at least one of channel access priority information related to the to-be-transmitted information of the IAB-DU (which can also be referred to as channel access priority related information of the to-be-transmitted information of the IAB-DU) and downlink HARQ transmission error statistical information of the IAB-DU.

[0071] Alternatively, the IAB-DU related information can also include DU time-frequency resource configuration information.

[0072] Currently, the CU can allocate resources to the IAB-DU of an IAB node through F1 signaling. The types of IAB-DU time-frequency resource configuration include HARD type, soft type and not available (NA) type. The HARD or soft resource further includes uplink, downlink and flexible uplink and downlink; and the NA is a non-usable physical resource. The HARD resource allocated to an IAB-DU is a resource that can be autonomously used by the IAB-DU; the soft resource allocated to an IAB-DU is a resource that can be used by the IAB-DU when its parent IAB-DU does not use the resource; and the resource indicated as NA is a resource that cannot be used by the IAB node. In addition, the parent IAB-DU can dynamically indicate to the child IAB node whether the soft resource is available, and if it is indicated as available, the child IAB-DU can use the resource.

[0073] In the present implementation, the first IAB node can further determine, according to the DU time-frequency resource configuration information, whether to determine the association parameter of the CAPC according to the IAB-MT related information, or to determine the association parameter of the CAPC according to the IAB-DU related information, or to determine the association parameter of the CAPC according to the indication of the parent IAB node.

[0074] For example, in the case where the IAB network is configured with multiplex scheduling of IAB-MT and IAB-DU, if the multiplex scheduling mode is configured on the HARD resource of the parent IAB-DU, the association parameter of the CAPC can be determined according to the IAB-MT related information of the child IAB node, and the target CAPC value determined according to the association parameter of the CAPC can be used for LBT corresponding to the COT of the multiplex scheduling.

[0075] For another example, in the case where the IAB network is configured with multiplex scheduling of IAB-MT and IAB-DU, if the multiplex scheduling mode is configured on the HARD resource of the child IAB-DU, the association parameter of the CAPC can be determined according to the IAB-DU related information of the child IAB node.

[0076] In a third alternative implementation, the association parameter of the CAPC can also be indicated by a parent IAB node of the first IAB node. For example, if the child IAB-MT receives an indication about the target CAPC from the parent IAB-DU, the received indication is preferred to be followed to determine the target CAPC value, while the IAB-MT-related information or the IAB-DU-related information of the child IAB-MT are ignored.

[0077] It is worth noting that at least two of the above three implementations can be combined with each other, for example, the association parameter of the CAPC is determined according to the indication of the parent IAB node and the uplink transmission state (i.e., uplink HARQ transmission error statistics) of the IAB-MT; the association parameter of the CAPC is determined according to the indication of the parent IAB node and the downlink transmission state (i.e., downlink HARQ transmission error statistics) of the IAB-DU; the association parameter of the CAPC is determined according to the indication of the parent IAB node, the downlink transmission state of the IAB-MT, and the downlink transmission state of the IAB-DU, and the like, which are not limited here.

[0078] Step 202, the first IAB node determines a target CAPC value based on the association parameter of the CAPC.

[0079] In a specific implementation, the first IAB node can determine the target CAPC value based on at least one of the association parameters of the CAPC, for example:

[0080] determining the channel access priority of at least one CAPC value corresponding to the association parameter of the CAPC as the target CAPC value; or determining the target CAPC value according to the IAB-MT-related information and / or the IAB-DU-related information; or determining the target CAPC value according to the channel access priority of a certain data type of the to-be-transmitted information of the IAB-MT and / or the to-be-transmitted information of the IAB-DU; or preferentially determining the target CAPC value according to the indication of the parent IAB node, and the like, which are not exhaustive.

[0081] In an implementation, after determining the target CAPC value, if the IAB network operates in an unlicensed frequency band, the first IAB node can initiate LBT based on the target CAPC value.

[0082] At this time, the first IAB node can select a channel or path matching the current service or transmission quality according to the obtained LBT result, so as to improve the communication performance of the IAB network when performing data transmission on the channel or path.

[0083] As an alternative implementation, the channel access priority related information of the to-be-transmitted information includes at least one of:

[0084] Channel access priority related information of the BAP control PDU;

[0085] 5QI information of an input logical channel or an input backhaul logical channel of the to-be-transmitted information;

[0086] 5QI information of an output logical channel or an output backhaul logical channel of the to-be-transmitted information;

[0087] Channel access priority related information carried by the to-be-transmitted BAP PDU, wherein the to-be-transmitted information includes the to-be-transmitted BAP PDU;

[0088] Channel access priority related information of the F1 control information.

[0089] In the first aspect, according to the current protocol, when the to-be-transmitted information of the IAB node includes a BAP control PDU, the BAP control PDU can be mapped to a preconfigured BH RLC CH for transmission, and when there is no BH RLC CH configured with mapping designation, the BAP control PDU can also be mapped to any BH RLC CH for transmission. However, since the BAP control PDU itself has no specific Quality of Service (QoS) parameter, the corresponding CAPC value cannot be determined according to the 5QI of the BAP control PDU.

[0090] In the embodiments of the present application, the channel access priority related information of the BAP control PDU can be used to determine the corresponding CAPC value of the BAP control PDU. Specifically, in the embodiments of the present application, at least one of the following methods can be used to determine the corresponding CAPC value of the BAP control PDU:

[0091] Method one

[0092] When the to-be-transmitted information of the first IAB node includes a BAP control PDU, the channel access priority of the BAP control PDU is determined as: the pre-defined or pre-configured channel access priority of the BAP control PDU, or the channel access priority pre-associated with the type of the BAP control PDU, that is, the first IAB node can determine the target CAPC value according to the type or channel priority of the BAP control PDU.

[0093] For example, the BAP control PDU of BH link radio link failure notification type has the highest channel access priority, which specifically includes: the BAP control PDU corresponding to the BH link radio link failure message, the BH link radio link failure recovery success message and the radio link recovery failure message respectively are predefined as the highest channel access priority (i.e. the CAPC value is the smallest).

[0094] For another example, the BH link traffic control message can also have the highest channel access priority, which specifically includes: the congestion report message according to the BAP path and the congestion report message according to the BH RLC CH are predefined as the highest channel access priority.

[0095] Method two

[0096] In the case of only containing BAP control PDU in the MAC PDU, the first IAB node can determine the target CAPC value according to the CAPC value of the BAP control PDU with the highest channel access priority in the MAC PDU.

[0097] Method three

[0098] In the case of including BAP control PDU and MAC CE in the MAC PDU, the first IAB node can determine the target CAPC value according to the CAPC value of the BAP control PDU with the highest channel access priority and / or the MAC CE with the highest channel access priority in the MAC PDU, for example: determining the target CAPC value according to the CAPC of the BAP control PDU with the highest channel access priority; or determining the target CAPC value according to the CAPC of the MAC CE with the highest channel access priority; or comparing the channel access priorities of the MAC CE and the BAP control PDU, and using the CAPC value corresponding to the one with the highest priority as the target CAPC value.

[0099] Method four

[0100] In the case of multiplexing transmission of BAP control PDU and user data, the first IAB node can determine the target CAPC value according to the channel access priority of the user data.

[0101] In a second aspect, in a case where the to-be-transmitted information of the IAB node includes F1 control information, the F1 control information can be packaged into a radio resource control (RRC) message of the MT for transmission, or can be transmitted through a BH RLC CH. Therefore, it is not convenient to determine the CAPC value corresponding to the F1 control information according to the existing method.

[0102] In the embodiments of the present application, the CAPC value corresponding to the F1 control information can be determined according to the channel access priority related information of the F1 control information, and the F1 control information can specifically represent the F1 control information of the interface between the CU and the DU. Specifically, the CAPC value corresponding to the F1 control information can be determined by at least one of the following methods in the embodiments of the present application:

[0103] Method one

[0104] In a case where the F1 control information is carried in the RRC message of the MT for transmission, the first IAB node determines the target CAPC value according to the channel access priority of the RRC signaling. That is, the access channel priority of the F1 control information is determined as the access channel priority of the RRC signaling, that is, the highest channel access priority.

[0105] Method two

[0106] In a case where the F1 control information is transmitted through a BH RLC CH, the first IAB node determines that the target CAPC value is equal to the CAPC value corresponding to the preset highest channel access priority.

[0107] In a specific implementation, the above-mentioned preset highest priority can be understood as the highest channel access priority specified in the communication protocol (such as CAPC=1 in Table 1).

[0108] Method three

[0109] In a case where the F1 control information is multiplexed with user plane data in one MAC PDU for transmission, the first IAB node determines the target CAPC value according to the CAPC value of the data with the lowest channel access priority in the MAC PDU.

[0110] In the embodiments, the target CAPC value can be determined according to the CAPC value of the data with the lowest channel access priority in the MAC PDU, and the COT initiated by the LBT based on the target CAPC value can be used for shared transmission of all data in the MAC PDU.

[0111] In a third aspect, in the IAB network, there are different scenarios for data forwarding. The first scenario is normal data forwarding, i.e., data is forwarded along a pre-configured preferred path. In this case, data is backhauled according to the pre-configured BAP path and BH RLC CH. Specifically, at least one of the following methods can be used to determine the target CAPC value:

[0112] Method one

[0113] The BH RLC CH is configured by the network side with the same 5QI as the UE RLC LCH carried or the same 5QI as the corresponding CAPC of the UE RLC LCH carried. Then, the intermediate IAB node can determine the corresponding CAPC according to the 5QI using the existing method, e.g., determine the CAPC according to the 5QI of the mapped output BH RLC CH. This method is the same as the method for determining the corresponding CAPC according to the 5QI in the prior art, and thus will not be described in detail.

[0114] Method two

[0115] As an optional implementation, the information to be transmitted includes a BAP PDU to be forwarded, and the BAP header region of the BAP PDU to be forwarded indicates a 5QI or a CAPC value;

[0116] The first IAB node determines the target CAPC value based on the associated parameters of the CAPC, including:

[0117] The first IAB node determines the target CAPC value corresponding to the BAP PDU to be forwarded according to the 5QI or CAPC value indicated in the BAP header region.

[0118] In a specific implementation, the 5QI or CAPC value indicated in the BAP header region can be understood as that the 5QI or CAPC value is encapsulated in the BAP header of the BAP PDU to be forwarded, or the BAP header of the BAP PDU to be forwarded carries indication information of the 5QI or CAPC value. In this way, the next IAB node can determine the CAPC value of the BAP PDU according to the 5QI or CAPC value carried in the BAP header or the indication information thereof when receiving the BAP PDU, e.g., determine the CAPC value of the BAP PDU according to the 5QI carried or indicated in the BAP header; or take the CAPC value carried or indicated in the BAP header as the CAPC value of the BAP PDU.

[0119] In implementation, the 5QI or CAPC value or an indication of the 5QI or CAPC value can be encapsulated by the sending IAB node in the BAP header of the BAP PDU to indicate the CAPC of the next forwarding IAB node when forwarding the BAP PDU through the BAP header, so that the forwarding IAB node can determine the channel access priority when forwarding the BAP PDU according to the relevant information in the BAP header.

[0120] Further, when the next IAB node is the transmission destination (i.e. the end point) of the data to be transmitted, the IAB node can remove the indication information related to the CAPC in the BAP header, so as to reduce the occupation of resources and avoid interference of the indication information related to the CAPC in the BAP header with the interpretation of the BAP PDU by the receiving node.

[0121] The embodiment can be applied to determining the target CAPC according to the indication in the BAP header of the forwarded BAP PDU when the 5QI of the input logical channel or input backhaul logical channel (hereinafter referred to as input logical channel for convenience of description) is inconsistent with the 5QI of the output logical channel or output backhaul logical channel (hereinafter referred to as output logical channel for convenience of description).

[0122] For example, in the IAB network, for data forwarding of temporary path change, the data is forwarded along the alternative path and uses the alternative BH RLC CH, at this time, the 5QI of the temporarily used alternative BH RLC CH can be inconsistent with the 5QI of the UE RLC LCH corresponding to the temporarily forwarded data, resulting in that the CAPC determined according to the 5QI of the alternative BH RLC CH is different from the CAPC corresponding to the 5QI of the UE RLC LCH corresponding to the temporarily forwarded data, which does not conform to the existing protocol, and therefore, the target CAPC cannot be determined in the manner of determining the corresponding CAPC according to the 5QI in the prior art.

[0123] As another optional manner, the to-be-transmitted information includes a to-be-forwarded BAP PDU, and the first IAB node determines the target CAPC value based on the associated parameter of the CAPC, including at least one of the following:

[0124] In a case where the first IAB node fails to obtain the 5QI corresponding to the to-be-forwarded BAP PDU, the first IAB node determines the target CAPC value corresponding to the to-be-forwarded BAP PDU as a preset lowest priority;

[0125] The first IAB node determines the target CAPC value corresponding to the to-be-forwarded BAP PDU according to the 5QI of the input logical channel of the to-be-forwarded BAP PDU.

[0126] In the embodiment, for the case that the 5QI of the input logical channel is inconsistent with the 5QI of the output logical channel, at least one of the following methods can be used to determine the CAPC value of the temporarily forwarded data according to the 5QI information of at least one of the input logical channel and the output logical channel:

[0127] 1) The first IAB node determines the target CAPC value corresponding to the to-be-forwarded BAP PDU as a preset lowest priority in a case where the 5QI corresponding to the to-be-forwarded BAP PDU is not acquired.

[0128] In the embodiment, the first IAB node is a forwarding IAB node, and the forwarding IAB node does not know the 5QI corresponding to the temporarily forwarded BAP PDU. At this time, the forwarding IAB node can determine the target CAPC value corresponding to the to-be-forwarded BAP PDU as a preset lowest priority. The preset lowest priority can be understood as the lowest channel access priority specified in the communication protocol (such as CAPC = 4 in Table 1).

[0129] Through the above method, the COT of the LBT initiated according to the lowest channel access priority can be applied to the shared transmission of data corresponding to various CAPCs.

[0130] 2) The first IAB node determines the target CAPC value corresponding to the to-be-forwarded BAP PDU according to the 5QI of the input logical channel of the to-be-forwarded BAP PDU.

[0131] In the embodiment, the first IAB node can determine the channel access priority of the temporarily forwarded data according to the 5QI of the input logical channel (BH RLC CH or UE RLC LCH) of the temporarily forwarded data.

[0132] Of course, in addition to determining the channel access priority of the temporarily forwarded data through the above manner, the alternative output BH RLC CH can be further selected according to the channel access priority of the input logical channel of the temporarily forwarded data, wherein the channel access priority corresponding to the 5QI of the alternative output BH RLC CH can be the same as the channel access priority of the input logical channel of the temporarily forwarded data, or the channel access priority corresponding to the 5QI of the alternative output BH RLC CH is lower than the highest channel access priority among the channel access priorities of the input logical channel of the temporarily forwarded data. In this way, the difference between the channel access priority of the alternative output BH RLC CH and the channel access priority of the input logical channel of the temporarily forwarded data can be reduced, and the transmission reliability of the temporarily forwarded data can be improved.

[0133] As an optional implementation, the to-be-transmitted information includes a to-be-forwarded BAP PDU, and the method further includes:

[0134] The first IAB node selects a first output BH RLC CH as an alternative BH RLC CH for the to-be-forwarded BAP PDU.

[0135] The 5QI of the first output BH RLC CH corresponds to a first CAPC value, the input logical channel of the to-be-forwarded BAP PDU corresponds to a second CAPC value, and the first CAPC value is greater than or equal to the second CAPC value.

[0136] In implementation, if there is an output BH RLC CH having the same channel access priority as the above-mentioned second CAPC value, the output BH RLC CH is preferentially selected as the alternative BH RLC CH for the temporarily forwarded data; if there is no output BH RLC CH having the same channel access priority as the above-mentioned second CAPC value, an output BH RLC CH having a channel access priority closest to the second CAPC value and lower than the second CAPC value is selected as the alternative BH RLC CH for the temporarily forwarded data, so as to ensure that the temporarily forwarded BAP PDU can be reliably transmitted to the next node in the alternative path.

[0137] In other words, the channel access priority corresponding to the 5QI of the above-mentioned alternative BH RLC CH is the same as the channel access priority of the input logical channel (BH RLC CH or UE RLC LCH) of the temporarily forwarded data, or the channel access priority corresponding to the 5QI of the alternative BH RLC CH is the lower priority having the smallest difference from the channel access priority of the input logical channel (BH RLC CH or UE RLC LCH) of the temporarily forwarded data.

[0138] As an optional implementation, the first IAB node determines a target CAPC value based on an association parameter of the CAPC, including:

[0139] In a case where a maximum channel occupancy time (MCOT) of a third CAPC value corresponding to the to-be-transmitted information is less than a first time length, the first IAB node determines that the target CAPC value is equal to a fourth CAPC value.

[0140] The first time length is a transmission time length required by the to-be-transmitted information, and the fourth CAPC value is greater than the third CAPC value; and a MCOT corresponding to the fourth CAPC value is greater than a maximum channel occupancy time corresponding to the third CAPC value.

[0141] As an optional implementation, a correspondence between the CAPC and the MCOT (i.e., Tmcot,p) is shown in Table 2 as follows:

[0142] Table 2

[0143]

[0144] According to the correspondence between the CAPC and the MCOT shown in Table 2, the higher the priority of the CAPC is, the shorter the time of occupying the channel can be, and in the existing communication protocol, a COT initiated using a CAPC value x can only allow a logical channel (LCH) having a higher channel access priority (i.e., a CAPC value ≤ x) to use the COT for data transmission. Thus, it can cause a case where the channel occupied by the IAB node is not long enough to transmit accumulated high-priority data. That is, the CAPC determined in the prior art does not match the transmission time length required by the high-priority data accumulated by the first IAB node, and the transmission reliability of the high-priority data in the IAB network is reduced.

[0145] In the embodiments of the present application, by making the fourth CAPC value greater than the third CAPC value, and further making the MCOT corresponding to the fourth CAPC value longer than the MCOT corresponding to the third CAPC value, in a case where the MCOT of the third CAPC value corresponding to the to-be-transmitted information is less than the transmission time length required by the to-be-transmitted information, the third CAPC value is replaced by the fourth CAPC value, so that a COT with a longer time can be initiated when performing LBT according to the fourth CAPC value, and thus the COT can meet the transmission time length of the to-be-transmitted information, and the transmission reliability of the to-be-transmitted information is improved.

[0146] That is, with the present embodiment, the IAB-DU (downlink) / IAB-MT (uplink) is allowed to use a channel access priority lower than the priority of the information to be transmitted to perform channel contention, so that after successfully contending for the channel, it can enjoy a longer MCOT.

[0147] In the embodiments of the present application, the first IAB node in the IAB network can determine the associated parameters of the CAPC according to the IAB-MT related information and / or the IAB-DU related information and / or the indication information from the parent IAB node, and determine the target CAPC value according to the associated parameters of the CAPC, so that when the IAB network operates in the unlicensed frequency band, the target CAPC value can meet the usage regulations of the unlicensed frequency, and when LBT is initiated according to the target CAPC value, a more accurate LBT result can be obtained, facilitating the sharing and use of the unlicensed frequency, and thus improving the usage efficiency of the unlicensed frequency. It should be noted that the CAPC determination method provided in the embodiments of the present application can be executed by a CAPC determination device or a control module in the CAPC determination device for executing the CAPC determination method. In the embodiments of the present application, the CAPC determination device executes the CAPC determination method as an example to illustrate the CAPC determination device provided in the embodiments of the present application.

[0148] Please refer to Figure 3 The CAPC determination device 300 provided in the embodiments of the present application can include the following modules:

[0149] The acquisition module 301 is configured to acquire the associated parameters of the CAPC.

[0150] The determination module 302 is configured to determine the target CAPC value based on the associated parameters of the CAPC.

[0151] The associated parameters of the CAPC are determined according to at least one of the following:

[0152] The IAB-MT related information of the first IAB node;

[0153] The IAB-DU related information of the first IAB node;

[0154] The indication information from the parent IAB node of the first IAB node.

[0155] Optionally, the CAPC determination device 300 further includes:

[0156] The LBT initiation module is configured to initiate LBT based on the target CAPC value.

[0157] Optionally, the first IAB node includes at least one of the following:

[0158] an IAB-MT and an IAB-DU of a transmitting or forwarding IAB node in an IAB network;

[0159] an IAB-DU of a transmitting or forwarding IAB node in an IAB network.

[0160] Optionally, the IAB-MT related information comprises at least one of:

[0161] channel access priority related information of the to-be-transmitted information of the IAB-MT;

[0162] uplink HARQ transmission error statistical information of the IAB-MT;

[0163] Optionally, the IAB-DU related information comprises at least one of:

[0164] channel access priority related information of the to-be-transmitted information of the IAB-DU;

[0165] downlink HARQ transmission error statistical information of the IAB-DU;

[0166] DU time-frequency resource configuration information.

[0167] Optionally, the channel access priority related information of the to-be-transmitted information comprises at least one of:

[0168] channel access priority related information of a BAP control PDU;

[0169] 5QI information of an input logical channel or an input backhaul logical channel of the to-be-transmitted information;

[0170] 5QI information of an output logical channel or an output backhaul logical channel of the to-be-transmitted information;

[0171] channel access priority related information carried by a to-be-transmitted BAP PDU, the to-be-transmitted information comprising the to-be-transmitted BAP PDU;

[0172] channel access priority related information of F1 control information.

[0173] Optionally, the determining module 302 is specifically configured to perform at least one of:

[0174] determining the target CAPC value according to a type or a channel priority of the BAP control PDU;

[0175] In a case where only the BAP control PDU is included in the MAC PDU, the target CAPC value is determined according to a CAPC value of the BAP control PDU with the highest channel access priority in the MAC PDU;

[0176] In a case where the BAP control PDU and the MAC CE are included in the MAC PDU, the target CAPC value is determined according to a CAPC value of the BAP control PDU with the highest channel access priority and / or the MAC CE with the highest channel access priority in the MAC PDU;

[0177] In a case where the BAP control PDU and the user data are multiplexed for transmission, the target CAPC value is determined according to a CAPC value of the user data;

[0178] In a case where the F1 control information is transmitted in an RRC message of the IAB-MT, a channel access priority of the RRC signaling determines the target CAPC value;

[0179] In a case where the F1 control information is transmitted through the BH RLC CH, a channel access priority for determining the target CAPC value is a preset highest priority;

[0180] In a case where the F1 control information is multiplexed with the user plane data in a MAC PDU for transmission, the target CAPC value is determined according to a CAPC value of data with the lowest channel access priority in the MAC PDU.

[0181] Optionally, the information to be transmitted includes a BAP PDU to be forwarded, and a 5QI or a CAPC value is indicated in a BAP header region of the BAP PDU to be forwarded;

[0182] The determining module 302 is specifically configured to:

[0183] According to the 5QI or the CAPC value indicated in the BAP header region, a target CAPC value corresponding to the BAP PDU to be forwarded is determined.

[0184] Optionally, the information to be transmitted includes a BAP PDU to be forwarded, and the determining module 302 is specifically configured to perform at least one of the following:

[0185] In a case where the 5QI corresponding to the BAP PDU to be forwarded is not acquired, a target CAPC value corresponding to the BAP PDU to be forwarded is determined as a preset lowest priority;

[0186] The target CAPC value corresponding to the BAP PDU to be forwarded is determined according to a 5QI of an input logical channel of the BAP PDU to be forwarded.

[0187] Optionally, the information to be transmitted includes a BAP PDU to be forwarded, and the CAPC determination apparatus 300 further includes:

[0188] The selection module is configured to select a first output BH RLC CH as a candidate BH RLC CH of the BAP PDU to be forwarded.

[0189] The 5QI of the first output BH RLC CH corresponds to a first CAPC value, the input logical channel of the BAP PDU to be forwarded corresponds to a second CAPC value, and the first CAPC value is greater than or equal to the second CAPC value.

[0190] Optionally, the determination module 302 is specifically configured to:

[0191] In a case where a maximum channel occupancy time (MCOT) of a third CAPC value corresponding to the information to be transmitted is less than a first time length, the target CAPC value is determined to be equal to a fourth CAPC value.

[0192] The first time length is a transmission time length required by the information to be transmitted, and the fourth CAPC value is greater than the third CAPC value; the MCOT corresponding to the fourth CAPC value is greater than the maximum channel occupancy time corresponding to the third CAPC value.

[0193] The CAPC determination apparatus 300 provided by the embodiments of the present application can perform each step performed by the first IAB node in the CAPC determination method embodiment as shown in Figure 2 , and can achieve the same beneficial effects. To avoid repetition, details are not described here.

[0194] Optionally, as shown in Figure 4 , the embodiments of the present application further provide a communication device 400, which includes a processor 401, a memory 402, a program or instruction stored in the memory 402 and executable on the processor 401. For example, when the communication device 400 is an IAB node, a CU node or a relay UE, the program or instruction is executed by the processor 401 to implement each process of the method embodiment as shown in Figure 2 , and can achieve the same technical effects. To avoid repetition, details are not described here.

[0195] The embodiments of the present application further provide a network side device, which includes a processor and a communication interface.

[0196] The communication interface is configured to obtain an association parameter of the CAPC, and the processor is configured to determine a target CAPC value based on the association parameter of the CAPC.

[0197] The association parameter of the CAPC is determined according to at least one of the following:

[0198] Information related to an IAB-MT of the first IAB node;

[0199] Information related to an IAB-DU of the first IAB node;

[0200] Indication information from a parent IAB node of the first IAB node.

[0201] The network side device embodiment is corresponding to the method embodiment as Figure 2 shown, and each implementation process and implementation manner of the above method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

[0202] Specifically, the embodiment of the present application further provides a network side device. As Figure 5 shown, the network device 500 includes an antenna 501, a radio frequency device 502, and a baseband device 503. The antenna 501 is connected to the radio frequency device 502. In the uplink direction, the radio frequency device 502 receives information through the antenna 501 and sends the received information to the baseband device 503 for processing. In the downlink direction, the baseband device 503 processes the information to be sent and sends it to the radio frequency device 502. The radio frequency device 502 processes the received information and sends it out through the antenna 501.

[0203] The above frequency band processing device can be located in the baseband device 503. The method performed by the network side device in the above embodiment can be implemented in the baseband device 503. The baseband device 503 includes a processor 504 and a memory 505.

[0204] The baseband device 503 may, for example, include at least one baseband board on which a plurality of chips are arranged, as Figure 5 shown. One of the chips is, for example, a processor 504 connected to the memory 505 to call the program in the memory 505 and perform the network device operation shown in the above method embodiment.

[0205] The baseband device 503 can also include a network interface 506 for interacting with the radio frequency device 502. The interface is, for example, a common public radio interface (CPRI).

[0206] Specifically, the network side device of the embodiment of the present application further comprises instructions or programs stored on the memory 505 and executable on the processor 504, and the processor 504 invokes the instructions or programs in the memory 505 to execute the method shown in the above embodiment and achieve the same technical effects. To avoid repetition, details are not described herein. Figure 3 The method executed by each module shown in the above embodiment and the same technical effects are achieved. To avoid repetition, details are not described herein.

[0207] The embodiment of the present application further provides a readable storage medium, and the readable storage medium stores programs or instructions, and the programs or instructions are executed by a processor to implement the method shown in the above embodiment and achieve the same technical effects. Figure 2 The embodiment of the method for determining the CAPC shown in the above embodiment and the same technical effects are achieved. To avoid repetition, details are not described herein.

[0208] The processor is the processor in the terminal in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, etc.

[0209] The embodiment of the present application further provides a chip, and the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used to run programs or instructions to implement the method shown in the above embodiment and achieve the same technical effects. Figure 2 The embodiment of the method for determining the CAPC shown in the above embodiment and the same technical effects are achieved. To avoid repetition, details are not described herein.

[0210] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0211] It should be noted that, in this document, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to the order of functions shown or discussed, and can also include functions performed in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0212] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned example methods can be realized by means of software and a necessary general hardware platform, and of course, can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a computer software product in essence or in the form of a part that contributes to the prior art, which is stored in a storage medium (such as a ROM / RAM, a magnetic disc, an optical disc), and includes a plurality of instructions for causing a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the various embodiments of the present application.

[0213] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many forms without departing from the scope of the present application under the inspiration of the present application, and all of them belong to the protection of the present application.

Claims

1. A method for determining channel access priority (CAPC), characterized in that, The method comprises: The first integrated access and backhaul, IAB, node acquires an associated parameter of a CAPC; The first IAB node determines a target CAPC value based on the associated parameter of the CAPC; The associated parameter of the CAPC is determined according to at least one of the following: Information related to an IAB-node terminal function module, IAB-MT, of the first IAB node; Information related to an IAB-node distributed unit module, IAB-DU, of the first IAB node; Indication information from a parent IAB node of the first IAB node.

2. The method of claim 1, wherein, After the first IAB node determines the target CAPC value based on the associated parameter of the CAPC, the method further comprises: The first IAB node initiates a listen before talk, LBT, based on the target CAPC value.

3. The method of claim 1, wherein, The first IAB node comprises at least one of the following: An IAB-MT and an IAB-DU of a transmitting or forwarding IAB node in an IAB network; An IAB-DU of a transmitting or forwarding IAB node in an IAB network.

4. The method of claim 1, wherein, The information related to the IAB-MT comprises at least one of the following: Channel access priority related information of to-be-transmitted information of the IAB-MT; Uplink hybrid automatic repeat request, HARQ, transmission error statistical information of the IAB-MT.

5. The method of claim 1, wherein, The information related to the IAB-DU comprises at least one of the following: Channel access priority related information of to-be-transmitted information of the IAB-DU; Downlink HARQ transmission error statistical information of the IAB-DU; DU time-frequency resource configuration information.

6. The method according to claim 4 or 5, characterized in that, The channel access priority related information of the to-be-transmitted information comprises at least one of the following: Channel access priority related information of a backhaul adaptation protocol control data unit, BAP control PDU; 5QI information of an input logical channel or an input backhaul logical channel of the to-be-transmitted information; 5QI information of an output logical channel or an output backhaul logical channel of the to-be-transmitted information; Channel access priority related information carried by a to-be-transmitted BAP PDU, the to-be-transmitted information comprising the to-be-transmitted BAP PDU; Channel access priority related information of F1 control information.

7. The method of claim 6, wherein, The first IAB node determines the target CAPC value based on the associated parameter of the CAPC, comprising at least one of the following: The first IAB node determines the target CAPC value according to a type or a channel priority of the BAP control PDU; In a case where only BAP control PDUs are contained in a medium access control protocol data unit, MAC PDU, the first IAB node determines the target CAPC value according to a CAPC value of a BAP control PDU with a highest channel access priority in the MAC PDU; In a case where BAP control PDUs and MAC CEs are contained in a MAC PDU, the first IAB node determines the target CAPC value according to a CAPC value of a BAP control PDU with a highest channel access priority and / or a MAC CE with a highest channel access priority in the MAC PDU; In the case of multiplexing the BAP control PDU and user data transmission, the first IAB node determines the target CAPC value according to the CAPC value of the user data; In the case of transmitting the F1 control information in a radio resource control (RRC) message of the IAB-MT, the first IAB node determines the target CAPC value according to a channel access priority of the RRC signaling; In the case of transmitting the F1 control information through a backhaul link radio link control (BH RLC) channel, the first IAB node determines that the target CAPC value is equal to a CAPC value corresponding to a preset highest channel access priority; In the case of multiplexing the F1 control information and user plane data in one MAC PDU, the first IAB node determines the target CAPC value according to a CAPC value of data with the lowest channel access priority in the MAC PDU.

8. The method of claim 6, wherein, The information to be transmitted includes a BAP PDU to be forwarded, and a 5QI or a CAPC value is indicated in a BAP header region of the BAP PDU to be forwarded; The first IAB node determines a target CAPC value based on an associated parameter of the CAPC, including: The first IAB node determines the target CAPC value corresponding to the BAP PDU to be forwarded according to the 5QI or the CAPC value indicated in the BAP header region.

9. The method of claim 6, wherein, The information to be transmitted includes a BAP PDU to be forwarded, and the first IAB node determines a target CAPC value based on an associated parameter of the CAPC, including at least one of the following: In a case where the first IAB node does not acquire a 5QI corresponding to the BAP PDU to be forwarded, the first IAB node determines that the target CAPC value corresponding to the BAP PDU to be forwarded is a preset lowest priority. The first IAB node determines the target CAPC value corresponding to the BAP PDU to be forwarded according to a 5QI of an input logical channel of the BAP PDU to be forwarded.

10. The method of claim 6, wherein, The information to be transmitted includes a BAP PDU to be forwarded, and the method further includes: The first IAB node selects a first output BH RLC CH as a candidate BH RLC CH of the BAP PDU to be forwarded; The 5QI of the first output BH RLC CH corresponds to a first CAPC value, the input logical channel of the BAP PDU to be forwarded corresponds to a second CAPC value, and the first CAPC value is greater than or equal to the second CAPC value.

11. The method of claim 6, wherein, The first IAB node determines a target CAPC value based on an associated parameter of the CAPC, including: In a case where the first IAB node determines that a maximum channel occupancy time (MCOT) of a third CAPC value corresponding to the information to be transmitted is less than a first time length, the first IAB node determines that the target CAPC value is equal to a fourth CAPC value; The first time length is a transmission time length required by the information to be transmitted, the fourth CAPC value is greater than the third CAPC value, and the MCOT corresponding to the fourth CAPC value is greater than a maximum channel occupancy time corresponding to the third CAPC value.

12. A device for determining channel access priority (CAPC), characterized in that, Comprising: an acquisition module, configured to acquire an associated parameter of a CAPC; a determination module, configured to determine a target CAPC value based on the associated parameter of the CAPC; wherein the associated parameter of the CAPC is determined according to at least one of the following: information related to an IAB-MT of a first IAB node; information related to an IAB-DU of the first IAB node; indication information from a parent IAB node of the first IAB node.

13. The apparatus of claim 12, wherein, Further comprising: an LBT initiation module, configured to initiate LBT based on the target CAPC value.

14. The apparatus of claim 12, wherein, The first IAB node comprises at least one of the following: an IAB-MT and an IAB-DU of a transmitting or forwarding IAB node in an IAB network; an IAB-DU of a transmitting or forwarding IAB node in an IAB network.

15. The apparatus of claim 12, wherein, The IAB-MT-related information comprises at least one of the following: channel access priority-related information of to-be-transmitted information of the IAB-MT; uplink HARQ transmission error statistical information of the IAB-MT.

16. The apparatus of claim 12, wherein, The IAB-DU-related information comprises at least one of the following: channel access priority-related information of to-be-transmitted information of the IAB-DU; downlink HARQ transmission error statistical information of the IAB-DU; DU time-frequency resource configuration information.

17. The apparatus of claim 15 or 16, wherein, The channel access priority-related information of the to-be-transmitted information comprises at least one of the following: channel access priority-related information of a BAP control PDU; 5QI information of an input logical channel or an input backhaul logical channel of the to-be-transmitted information; 5QI information of an output logical channel or an output backhaul logical channel of the to-be-transmitted information; channel access priority-related information carried by a to-be-transmitted BAP PDU, wherein the to-be-transmitted information comprises the to-be-transmitted BAP PDU; channel access priority-related information of F1 control information.

18. The apparatus of claim 17, wherein, The determination module is specifically configured to perform at least one of the following: determining the target CAPC value according to a type or a channel priority of the BAP control PDU; in a case where a MAC PDU only contains BAP control PDUs, determining the target CAPC value according to a CAPC value of a BAP control PDU with the highest channel access priority in the MAC PDU; in a case where a MAC PDU comprises BAP control PDUs and MAC CEs, determining the target CAPC value according to a CAPC value of a BAP control PDU with the highest channel access priority and / or a MAC CE with the highest channel access priority in the MAC PDU; in a case where the BAP control PDU and user data are multiplexed and transmitted, determining the target CAPC value according to a CAPC value of the user data; In a case that the F1 control information is carried in a radio resource control (RRC) message of the IAB-MT, a channel access priority of the RRC signaling determines the target CAPC value; In a case that the F1 control information is transmitted through a backhaul radio link control (BH RLC) channel, the target CAPC value is determined as a corresponding CAPC value of a preset highest channel access priority; In a case that the F1 control information is multiplexed with user plane data in a MAC PDU, the target CAPC value is determined according to a CAPC value of data with a lowest channel access priority in the MAC PDU.

19. The apparatus of claim 17, wherein, The information to be transmitted includes a BAP PDU to be forwarded, and a 5QI or a CAPC value is indicated in a BAP header region of the BAP PDU to be forwarded; The determining module is specifically configured to: determine a target CAPC value corresponding to the BAP PDU to be forwarded according to the 5QI or the CAPC value indicated in the BAP header region.

20. The apparatus of claim 17, wherein, The information to be transmitted includes a BAP PDU to be forwarded, and the determining module is specifically configured to perform at least one of the following: In a case that the 5QI corresponding to the BAP PDU to be forwarded is not acquired, determine the target CAPC value corresponding to the BAP PDU to be forwarded as a preset lowest priority; determine the target CAPC value corresponding to the BAP PDU to be forwarded according to a 5QI of an input logical channel of the BAP PDU to be forwarded.

21. The apparatus of claim 17, wherein, The information to be transmitted includes a BAP PDU to be forwarded, and the CAPC determining apparatus further includes: a selecting module configured to select a first output BH RLC CH as a candidate BH RLC CH of the BAP PDU to be forwarded; wherein a 5QI of the first output BH RLC CH corresponds to a first CAPC value, an input logical channel of the BAP PDU to be forwarded corresponds to a second CAPC value, and the first CAPC value is greater than or equal to the second CAPC value.

22. The apparatus of claim 17, wherein, The determining module is specifically configured to: determine the target CAPC value as a fourth CAPC value in a case that a maximum channel occupancy time (MCOT) of a third CAPC value corresponding to the information to be transmitted is less than a first time length; wherein the first time length is a transmission time length required by the information to be transmitted, the fourth CAPC value is greater than the third CAPC value, and a MCOT corresponding to the fourth CAPC value is greater than a maximum channel occupancy time corresponding to the third CAPC value.

23. A network-side device, comprising: The apparatus includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the method for determining a channel access priority (CAPC) according to any one of claims 1 to 11.

24. A readable storage medium characterized by, The program or instructions are stored on the readable storage medium, and the program or instructions are executed by the processor to implement the steps of the method for determining a channel access priority (CAPC) according to any one of claims 1 to 11.

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