Return link management, apparatus, and computer readable medium

Abstract

A wireless communication method is disclosed. A method of wireless communication includes establishing one or more backhaul links between a wireless communication node and a base station (BS); and receiving, by the wireless communication node, first configuration information for performing radio link monitoring (RLM) or beam failure detection (BFD) on the one or more backhaul links.

Description

Technical Field

[0001] The present disclosure generally relates to wireless communication, and more particularly, to wireless communication regarding a backhaul link. Background Art

[0002] Wireless communication technology is a key component of an increasingly interconnected global communication network. Wireless communication relies on accurately allocated time and frequency resources to transmit and receive wireless signals. Repeaters can increase the coverage range of wireless communication signals, but the management of the backhaul link of repeaters can be improved. Summary of the Invention

[0003] This summary of the invention is a brief description of some aspects of the present disclosure. It is not intended to limit the scope of the present disclosure.

[0004] According to some embodiments of the present disclosure, a wireless communication method is provided. The method includes: establishing one or more backhaul links between a wireless communication node and a Base Station (BS); and receiving, by the wireless communication node, first configuration information for performing Radio Link Monitoring (RLM) or Beam Failure Detection (BFD) on the one or more backhaul links.

[0005] According to some embodiments of the present disclosure, another wireless communication method is provided. The method includes: establishing one or more backhaul links between a wireless communication node and a Base Station (BS); and transmitting, by the BS, first configuration information for the wireless communication node to perform Radio Link Monitoring (RLM) or Beam Failure Detection (BFD) on the one or more backhaul links.

[0006] Another embodiment of the present disclosure provides a wireless communication device, including a memory storing one or more programs and a processor, the processor being electrically coupled to the memory and configured to execute the one or more programs to perform any method or step or a combination thereof in the present disclosure.

[0007] Another embodiment of the present disclosure provides a non-transitory computer-readable storage medium storing one or more programs, the one or more programs being configured to, when executed by a processor, cause the execution of any method or step or a combination thereof in the present disclosure.

[0008] According to some embodiments of the present disclosure, one or more wireless communication methods are also disclosed, which include combinations of certain methods, aspects, elements, and steps disclosed in various embodiments of the present disclosure (shown in a general view or a specific view).

[0009] The above and other aspects and their implementations are described in more detail in the drawings, the description, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The various exemplary embodiments of the present disclosure are described in detail below with reference to the following drawings. The drawings are provided for illustrative purposes only and only describe the exemplary embodiments of the present disclosure to facilitate understanding of the present disclosure. Therefore, the drawings should not be considered as limiting the breadth, scope, or applicability of the present disclosure. It should be noted that these drawings are not necessarily drawn to scale for clarity and convenience of illustration.

[0011] Figure 1 An exemplary wireless communication system with a repeater is shown;

[0012] Figure 2 Shows Figure 1 the component structures of different wireless communication nodes; and

[0013] Figure 3 Shows the frequency resource allocation according to some examples of the present disclosure. DETAILED DESCRIPTION

[0014] Communication coverage is one of the key points in cellular network deployment. Mobile operators rely on different types of network nodes to provide comprehensive coverage in their deployments. Therefore, in order to increase the flexibility of mobile operator network deployments, new types of network nodes have been considered. For example, Integrated Access and Backhaul (IAB) has been introduced and further enhanced as a new type of network node that does not require a wired backhaul link. Another type of network node is a Radio Frequency (RF) repeater, which simply amplifies and forwards the received signal. RF repeaters have been widely deployed to supplement the coverage provided by conventional full-stack cells.

[0015] A network-controlled repeater is also introduced, which, as an enhancement to traditional RF repeaters, has the ability to receive and process lateral control information from the network. The lateral control information may allow the network-controlled repeater to perform amplification and forwarding operations in a more efficient manner. Potential benefits may include reduced unnecessary noise amplification, transmission and reception with better spatial directivity, and simplified network integration. Therefore, network-controlled repeaters are regarded by some industry players as a stepping stone to re-configurable intelligent surfaces (RIS). RIS nodes can adjust the phase and amplitude of received signals to improve coverage.

[0016] This disclosure generally relates to this type of network node (or smart node (SN)), including but not limited to network-controlled repeaters (NCR), smart repeaters, RIS, or IAB.

[0017] Figure 1 An exemplary model of a wireless communication system with an intermediate SN is shown. The SN can include two parts, namely a mobile termination (MT) part and a forwarding part. The wireless link between the BS and the forwarding part includes a backhaul link, and the wireless link between the BS and the MT part includes a control link. The wireless link between the SN and a mobile device or user equipment (UE) includes an access link. In the downlink transmission of the backhaul link, the forwarding part forwards the wireless signal received from the BS to the mobile device. In the uplink transmission of the backhaul link, the forwarding part forwards the wireless signal received from the mobile device and forwards it to the BS. The forwarding part can process the wireless signal or simply amplify the wireless signal. The MT part can be connected to the BS as an ordinary mobile device. In addition, the MT part can receive side control information (forwarding configuration) from the BS. When the SN MT (i.e., the MT part) is in the radio resource control (RRC) connected (i.e., RRC_CONNECTED) state, the control link can include one or more serving cells.

[0018] Figure 2 A block diagram of an exemplary wireless communication system 10 according to some embodiments of the present disclosure is shown. The system 10 can perform various methods / steps disclosed in this disclosure. The system 10 can include components and elements configured to support operational features that need not be described in detail herein.

[0019] System 10 may include BS 110 and UE 120. BS 110 includes a BS transceiver or transceiver module 112, a BS antenna system 116, a BS memory or memory module 114, a BS processor or processor module 113, and a network interface 111. When necessary, the components of BS 110 may be electrically coupled and communicate with each other via a data communication bus 180. Similarly, UE 120 includes a UE transceiver or transceiver module 122, a UE antenna system 126, a UE memory or memory module 124, a UE processor or processor module 123, and an input / output (I / O) interface 121. When necessary, the components of UE 120 may be electrically coupled and communicate with each other via a data communication bus 190. The SN 130 connected between the BS and the UE includes an SN transceiver or transceiver module 132, an SN antenna system 136, an SN memory or memory module 134, an SN processor or processor module 133, and a network interface 131. When necessary, the components of SN 130 may be electrically coupled and communicate with each other via a data communication bus 190. BS 110 communicates with UE 120 via SN 130 and the communication channels therebetween, and the communication channels may be any wireless channel or other medium known in the art suitable for data transmission described herein.

[0020] As will be understood by those of ordinary skill in the art, system 10 may also include any number of modules other than Figure 2 the modules shown. Those skilled in the art will appreciate that the various illustrative blocks, modules, circuits, and processing logics described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, the various illustrative components, blocks, modules, circuits, and steps are generally described in terms of their functionality. Whether this functionality is implemented as hardware, firmware, or software depends on the particular application and the design constraints imposed on the overall system. Persons familiar with the concepts described herein can implement this functionality in a suitable manner for each particular application, but such implementation decisions should not be construed as limiting the scope of the present disclosure.

[0021] The processor modules 113, 123, 133 can be implemented or embodied using a general-purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, which are designed to perform the functions described herein. In this way, the processor modules can be implemented as microprocessors, controllers, microcontrollers, state machines, etc. The processor modules can also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, multiple microprocessors, the combination of one or more microprocessors and a digital signal processor core, or any other such configuration.

[0022] In addition, the steps of the methods or algorithms described in connection with the embodiments disclosed herein can be directly embodied in hardware, firmware, software modules executed respectively by the processor modules 113, 123, 133, or any practical combination thereof. The memory modules 114, 124, 134 can be implemented as random access memory (RAM memory), flash memory, electrically erasable programmable read-only memory (EEPROM memory), registers, read-only memory (ROM memory), erasable programmable read-only memory (EPROM memory), hard disk, removable disk, compact disc read-only memory (CD-ROM), or any other form of storage medium known in the art. In this regard, the memory modules 114, 124, 134 can be respectively coupled to the processor modules 113, 123, 133 such that the processor modules 113, 123, 133 can read information from and write information to the processor modules 113, 123, 133. The memory modules 114, 124, 134 can also be integrated into their respective processor modules 113, 123, 133. In some embodiments, the memory modules 114, 124, 134 can each include a cache memory for storing temporary variables or other intermediate information during the execution of instructions to be executed respectively by the processor modules 113, 123, 133. The memory modules 114, 124, 134 can also each include non-volatile memory for storing the instructions to be executed respectively by the processor modules 113, 123, 133.

[0023] When the mobile device is in the RRC_CONNECTED state, the mobile device can perform Radio Link Monitoring (RLM) in the active Bandwidth Part (BWP) based on the reference signals (RS) configured by the BS and the signal quality threshold. The RS can be a Synchronization Signal Block (SSB) or a Channel State Information RS (CSI-RS) in New Radio (NR). A set of RSs for RLM can be configured for the mobile device via Radio Resource Control (RRC) messages for each Downlink (DL) BWP of the serving cell. If the mobile device is configured with multiple DL BWPs for the serving cell, the mobile device uses the RSs for RLM configured for the active DL BWP to perform RLM. If no RSs for RLM are provided for the active DL BWP, the mobile device can use the RSs provided for the active Transmission Configuration Indicator (TCI) state for the reception of the Physical Downlink Control Channel (PDCCH) in the CORESETs on the active DL BWP.

[0024] In addition to the active DL BWP, the mobile device does not need to monitor the downlink radio link quality in the DL BWP. The physical layer in the mobile device evaluates the radio link quality once per indication period and compares it with the thresholds configured by the RRC message. The thresholds can include Qout and Qin. When the radio link quality of all RSs in a set of RSs for RLM is worse than the threshold Qout, the physical layer in the mobile device indicates an out-of-sync state to the higher layer. When the radio link quality of any RS in the set of RSs is better than the threshold Qin, the physical layer in the mobile device indicates an in-sync state to the higher layer.

[0025] When one of the following criteria is met, the mobile device may declare a Radio Link Failure (RLF): The radio problem timer started after a radio problem indication from the physical layer expires. In NR, when the mobile device receives N310 consecutive out-of-sync indications from the physical layer, the mobile device starts the radio problem timer (T310). While the timer T310 is running, once the mobile device receives N311 consecutive in-sync indications from the physical layer, the mobile device stops the timer T310. When the N310 count is reached, the mobile device declares an RLF. The values of N310, N311, and T310 can be configured by the BS to the mobile device via an RRC message with the Information element (IE) RLF-TimersAndConstants. N310 can define the maximum number of consecutive "out-of-sync" indications received from the lower layer for the PCell. N311 can define the maximum number of consecutive "in-sync" indications received from the lower layer for the PCell.

[0026] When declaring an RLF, the mobile device may select a suitable cell and then initiate an RRC reestablishment procedure. If no suitable cell is found within a specific time after declaring an RLF, the mobile device may enter the RRC idle (i.e., RRC_IDLE) state.

[0027] In this disclosure, the RS for RLM may also refer to the RS for RLF detection or cell failure detection. The RS for BFD may also refer to the RS for beam failure detection.

[0028] For Beam Failure Detection (BFD), the BS configures a beam failure detection reference signal (e.g., SSB or CSI-RS) to the mobile device. When the number of beam failure instance indications from the physical layer reaches a configured threshold before the expiration of the configured timer, the mobile device may declare a beam failure state.

[0029] After detecting a beam failure on the Primary Cell (PCell), the mobile device may trigger beam failure recovery by initiating a Random Access (RACH) procedure on the serving cell. If the RACH procedure involves a contention-based random access procedure, the mobile device may include an indication of the beam failure on the PCell in the Beam Failure Recovery Medium Access Control Control element (MAC CE).

[0030] On the other hand, after detecting beam failure on a Secondary Cell (SCell), the mobile device can trigger beam failure recovery by initiating the transmission of a BFR MAC CE for that SCell. The mobile device can select a suitable beam for the SCell (if available) and indicate the identity of the beam and information about the beam failure in the BFR MAC CE.

[0031] For the SN including Network Controlled Repeaters (NCR), RF repeaters, and IAB devices, the beams for the backhaul link and the control link can be different. Taking the NCR as an example, the backhaul link and the control link can be on the same carrier frequency. The BS configures the beam for the backhaul link by indicating a list of TCI states for Physical Downlink Control Channel (PDCCH) reception in the control link. The beam corresponding to the indicated TCI state is used in the backhaul link. However, it is not necessary to activate or use the beam used in the backhaul link in the control link.

[0032] In addition, in future development, the frequency bandwidth of the backhaul link can be greater than that of the control link. The frequency bandwidth of the backhaul link may not be on the same frequency as the control link.

[0033] Therefore, it is necessary to improve the radio link monitoring and beam failure detection of the backhaul link.

[0034] According to some embodiments of the present disclosure, the BS can configure the RLM or BFD configuration for the backhaul link of the SN. The RLM or BFD configuration can be configured by transmitting an RRC message to the MT part of the SN (hereinafter also referred to as the SN MT, SN MT part, etc.), and the MT part of the SN receives the RRC message to be configured. The SN can apply the configuration to the radio link monitoring or beam failure detection of the backhaul link.

[0035] The RLM or BFD of the backhaul link can be performed by the SN MT part or the SN forwarding part (i.e., the forwarding part of the SN). The RLM or BFD configuration can include the configuration of the RS for the RLM or BFD of the backhaul link. The RS can be associated with a resource set (e.g., a set of SSBs or a set of CSI-RSs). The RS can belong to the resource set, but the RS can be one of the reference signals in the resource set.

[0036] The RLM or BFD configuration of the backhaul link can be associated with the DL BWP of the SN MT. When a specific DL BWP is activated, the SN can apply the RLM or BFD configuration to the backhaul link. The SN can apply another RLM or BFD configuration to another DL BWP.

[0037] Alternatively, the RLM or BFD configuration for the backhaul link may not be associated with any specific DL BWP of the SN MT. Therefore, when any DL BWP is activated, the SN may apply the RLM or BFD configuration.

[0038] According to some embodiments of the present disclosure, the BS may configure more than one backhaul link associated with the same control link. Each backhaul link may be identified by a backhaul link identifier or reference information of the backhaul link. The RS may be applied to the RLM or BFD of the associated backhaul link.

[0039] The BS may configure multiple RSs for the RLM or BFD of the backhaul link such that each RS is located at a different position in the frequency domain. The BS may configure multiple RSs for the RLM or BFD of the backhaul link. In this way, each of them is associated with the backhaul link. The RS as part of the RLM or BFD configuration of the backhaul link may be within the active BWP of the SN MT, outside the active BWP of the SN MT, or outside the carrier frequency of the serving cell of the SN MT.

[0040] In the example as Figure 3 shown, the BS may configure two RSs for RLM or BFD for the backhaul link. The first RS may be within the frequency range of the active BWP of the SN MT or the serving cell. The second RS may be outside the frequency range of the active BWP of the SN MT or the serving cell. The first RS and the second RS may be associated with a backhaul link respectively. The first RS and the second RS may be part of the SSB or CSI-RS configuration.

[0041] According to some embodiments of the present disclosure, the BS may configure the RS for the RLM or BFD of the backhaul link according to one of the following options.

[0042] Option 1: The BS may configure the RLM or BFD configuration for the backhaul link. In the NR system, the configuration may be the IE of RadioLinkMonitoringConfig. This IE may at least include the RS for RLM, the RS for BFD, or the RS for both RLM and BFD.

[0043] The BS may configure more than one RLM or BFD configuration, each configuration being associated with a respective backhaul link. The RLM or BFD configuration of the backhaul link may be associated with the DL BWP configured for the SN MT. The SN may apply the RLM or BFD configuration configured for the current active BWP to perform RLM or BFD for the backhaul link. Alternatively, the RLM or BFD configuration may be configured not to be associated with any specific DL BWP of the SN MT. When the SN MT operates in any BWP, the SN may apply this configuration.

[0044] The RLM or BFD configuration may be associated with the backhaul link respectively. The BS may configure the RLM or BFD configuration by including the identifier of the relevant backhaul link. The RLM or BFD configuration may be applied to the relevant backhaul link.

[0045] Alternatively or additionally, the RLM or BFD configuration may be associated with a resource set configuration respectively, e.g., an SSB configuration or a CSI-RS configuration. The BS may configure the RLM or BFD configuration by including the information of the resource set. The information of the resource set may be the frequency information of the resource set or the identifier of the resource set.

[0046] The following is an example IE structure for some embodiments implementing the present disclosure:

[0047]

[0048]

[0049] In this example, two new IEs of the information of the backhaul link and the resource set are added to the IERadioLinkMonitoringConfig, which is defined in the current specification. It should be noted that these two new IEs are presented optionally and may not be presented simultaneously.

[0050] To associate the RLM or BFD configuration with the DL BWP, the RLM or BFD configuration of the backhaul link may be added to the IE of the DLBWP configuration. An example is provided below.

[0051]

[0052] To associate the RLM or BFD configuration with the serving cell instead of any DL BWP, the RLM or BFD configuration of the backhaul link may be added to the IE ServingCellConfig, which is for serving cell configuration. An example is provided below.

[0053]

[0054]

[0055] Option 2: The BS may configure a list of RSs for RLM or BFD in the RLM configuration for the SN MT for the backhaul link. In NR, the list of RSs for RLM or BFD for the backhaul link may be configured by including the failureDetectionResources-ToAddModList or the IE for beam failure in the IE RadioLinkMonitoringConfig, which is configured for the downlink BWP of the SN MT. The RSs for RLM or BFD for the backhaul link may be associated with a resource set. The association may be indicated by including the frequency information of the resource set or by including the identifier of the resource set. The RS may be associated with the backhaul link, which is identified by the identifier or frequency information of the backhaul link. The following provides an example IE.

[0056]

[0057] In this example, the new IEs: failureDetectionResourcesToAddModList-backhaulLink, backhaulLink-Information, and resourceSet-Information may be added to the existing IE RadioLinkMonitoringConfig. These new IEs may be used to configure the RSs for RLM or BFD for the backhaul link, the associated backhaul link information, and the associated resource set information.

[0058] Option 3: The BS may configure the RSs for RLM or BFD for the backhaul link in the list of RSs included in the RLM configuration. In NR, the BS may configure the RSs for RLM or BFD for the backhaul link by including the configuration of the RSs in the IE failureDetectionResources-ToAddModList or the beam failure detection set. The BS may indicate that the purpose of the RS is for RLM of the backhaul link, for BFD of the backhaul link, or for both RLM and BFD of the backhaul link.

[0059] The RSs for RLM or BFD for the backhaul link may be associated with a resource set. The association may be indicated by including the frequency information of the resource set or by including the identifier of the resource set. The RS may be associated with the backhaul link, which may be identified by the identifier or frequency information of the backhaul link.

[0060] The following provides an example IE.

[0061]

[0062]

[0063] In this example, the RS for RLM or BFD in the backhaul link can be configured by the IE RadioLinkMonitoringRS. The IE RadioLinkMonitoringRS is an element of the list of RSs for RLM or BFD in the existing specification. The RS for the backhaul link and the RS for control can be configured in the same list. In the configuration of a specific RS, the new IE RadioLinkMonitoringRS can be used to indicate whether the RS is for the backhaul link, and to indicate the associated backhaul link information and the associated resource set information.

[0064] Option 4: The BS can configure the RS for RLM or BFD in the backhaul link in an implicit manner. In this option, the BS does not explicitly configure the RS for RLM or BFD in the backhaul link in the RRC message. The BS can configure the DL beam for the backhaul link by indicating the TCI state, which is selected from the list of TCI states configured for PDCCH reception in the control link. In this case, the RS associated with the TCI state can be applied to RLM or BFD in the backhaul link. When the BS configures the DL beam for the backhaul link, the SN can perform RLM or BFD on the corresponding RS of the DL beam.

[0065] According to some embodiments of the present disclosure, the BS can also configure other configurations for RLM or BFD in the backhaul link.

[0066] For example, the BS can configure a signal quality threshold for RLM or BFD in the backhaul link. This signal quality threshold for RLM or BFD in the backhaul link can be a configuration different from that of RLM or BFD in the control link, for example, having different threshold levels or mechanisms. In NR, the signal quality threshold can be the BLER threshold pair index for sync and out-of-sync indication generation. In NR, this signal quality threshold for RLM can be the IE rlmInSyncOutOfSyncThreshold.

[0067] For example, the BS can further configure the maximum count of beam failure instances in the backhaul link. This maximum count of beam failure instances can be a configuration different from that of the control link. This maximum count of beam failure instances determines after how many beam failure events the SN triggers beam failure recovery.

[0068] For example, the BS may configure a beam failure detection timer for the backhaul link. The beam failure detection timer may be a configuration different from that of the control link. The timer may be used to handle beam failure detection, for example, timing a period for counting the number of beam failures. The BS may configure a timer and parameters for the RLF of the backhaul link. In NR, the timer and parameters may include at least one of N310, N311, or T310. The timer and parameters may be a configuration different from that of the control link to have different thresholds or different triggering conditions.

[0069] For example, once the BS has established the configuration, the SN may apply these configurations to the RLM or BFD of the backhaul link.

[0070] According to some embodiments of the present disclosure, the BS may also configure a beam failure recovery (BFR) configuration for the backhaul link.

[0071] For example, the BS may configure a BFR configuration for BFR of the backhaul link. For example, the BFR configuration may include at least one of the following: a list of RSs that identify candidate beams for recovery and associated RACH parameters; a timer for beam failure recovery; an L1-RSRP threshold for determining whether a candidate beam can be used by the SN to attempt contention-free random access (RA) to recover from a beam failure; a configuration of random access parameters for BFR; a search space for BFR RA; an indication of whether the SN is configured to send a BFR MAC CE for the backhaul link.

[0072] For example, the BFR configuration may be associated with the uplink BWP configured for the SN MT. Alternatively, the BFR configuration may not be associated with any specific BWP configured for the SN MT, but may be shared by multiple BWPs configured for the SN MT.

[0073] For example, the BFR configuration may be associated with the RS of the BFD of the backhaul link. In this case, when a beam failure occurs in the RS, the SN may perform BFR according to the BFR configuration. For example, the BFR configuration may be associated with the backhaul link. In this case, the SN may perform BFR for the backhaul link using the associated BFR configuration.

[0074] According to some embodiments of the present disclosure, the SN may handle RLF in some of the following ways. For example, the SN may perform RLM on the RS configured for the RLM of the backhaul link. The SN may perform RLM of the backhaul link according to the RLM configuration of the backhaul link configured by the BS. The RLM may be performed by the SN MT part or the SN forwarding part.

[0075] For example, when at least one of the following satisfies one or more conditions, the physical layer of the SN may indicate a desynchronization indication to a higher layer of the SN: all RSs configured for RLM of the backhaul link, all RSs configured for RLM of the backhaul link and located at the same frequency position, or all RSs configured for RLM of the backhaul link and belonging to the same resource set. One or more conditions may include that the radio link quality of the RS is worse than the threshold Qout.

[0076] When the RS satisfies the condition, the physical layer in the SN may indicate a synchronization indication to a higher layer of the SN. The RS may be one of the following: any RS configured for RLM of the backhaul link, any RS configured for RLM of the backhaul link and located at the same frequency position, or any RS configured for RLM of the backhaul link and belonging to the same resource set. The condition may be that the radio link quality of the RS is better than the threshold Qin.

[0077] For example, when receiving N310 consecutive desynchronization indications from the physical layer of the backhaul link, the SN may start a radio problem timer (e.g., timer T310) for RLM of the backhaul link. When the timer expires, the SN may declare RLF of the backhaul link. The SN may start more than one radio problem timer, and each timer is associated with the backhaul link.

[0078] When detecting RLF of the backhaul link, the SN may operate in at least one of the following ways.

[0079] If RLF of the backhaul link is declared, but RLF of the control link is not declared, the SN may transmit an RRC message or a MAC CE to the BS via the serving cell of the SN MT. The RRC message or the MAC CE may be used to indicate that RLF has occurred on the backhaul link. The MAC CE may be a MAC CE of a dedicated MAC CE type for identifying RLF of the backhaul link. The RRC message may indicate the type of failure to represent backhaul link radio link failure.

[0080] If RLF of the backhaul link and RLF of the control link are declared, the SN may perform an RRC reestablishment procedure to reestablish the RRC connection. The RRC reestablishment procedure may include at least one of selecting a suitable cell and transmitting an RRC reestablishment message to the BS.

[0081] If RLF of the control link is declared, but RLF of the backhaul link is not declared, the SN MT may perform an RRC reestablishment procedure to reestablish the RRC connection. The RRC reestablishment procedure may include at least one of selecting a suitable cell and transmitting an RRC reestablishment message to the BS. In addition, the SN may stop forwarding the TB in the SN forwarding part.

[0082] The MAC CE or RRC message may include information on the resource set associated with RLF. The RS of the RLM of the backhaul link belongs to the resource set. The information on the resource set may be the frequency information of the resource set or the identifier of the resource set.

[0083] Alternatively or additionally, the MAC CE or RRC message may include information on the backhaul link of the RLF. The information on the backhaul link may include one of the following: the frequency information of the backhaul link or the identifier of the backhaul link.

[0084] According to some embodiments of the present disclosure, the SN may handle beam failure in some of the following ways. For example, the SN may perform BFD on the RS configured for BFD of the backhaul link. The BFD may be performed by the SN MT part or the SN forwarding part. The SN may perform BFD of the backhaul link according to the BFD configuration of the backhaul link configured by the BS.

[0085] When beam failure is detected on the backhaul link, the SN may transmit a MAC CE or RRC message on the serving cell of the SN MT. The MAC CE or RRC message may indicate that beam failure has been detected on the backhaul link. For example, the MAC CE or RRC message may indicate the information on the RS configured for BFD of the backhaul link. The information on the RS configured for BFD of the backhaul link may include at least one of the following: the index of the RS, the resource set information to which the RS belongs, or the frequency information of the RS.

[0086] For example, the MAC CE or RRC message may include information on the candidate RS for establishing another beam connection. The candidate RS may be associated with the RS configured for BFD of the backhaul link, or may be associated with the backhaul link. For example, the MAC CE or RRC message may indicate the backhaul link information. The backhaul link information may include at least one of the following: the frequency information of the backhaul link or the identifier of the backhaul link.

[0087] For example, when beam failure is detected on the backhaul link and beam failure is also detected on the control link, the SN MT may initiate a RACH procedure according to the BFR configuration. The BFR configuration may be associated with the control link, or may be associated with the backhaul link. During the RACH procedure, the MAC CE or RRC message may be transmitted to the BS.

[0088] According to some embodiments of the present disclosure, the SN MT may indicate to the BS whether the SN MT or the SN forwarding part supports at least one of the following capabilities to support the RLM or BFD disclosed in the present disclosure. Thus, the BS may understand the capabilities of a specific UE.

[0089] The reportable capabilities include at least one of the following: whether the SN supports RLM for the backhaul link; whether the SN supports BFD for the backhaul link; whether the SN supports RLM for the backhaul link outside the active BWP of the SN MT; whether the SN supports BFD for the backhaul link outside the active BWP of the SN MT; whether the SN supports RLM for the backhaul link outside the carrier frequency of the serving cell of the SN MT; and / or whether the SN supports BFD for the backhaul link outside the carrier frequency of the serving cell of the SN MT.

[0090] According to the above disclosure, the BS may configure RLM or BFD configuration for the backhaul link. The BS may configure RLM or BFD configuration for more than one backhaul link associated with the serving cell of the SN MT. The RLM or BFD configuration of the backhaul link may be DL BWP specific. The BFR configuration of the backhaul link may also be different from the configuration of the control link.

[0091] CSI reporting is used to report downlink channel state information to the BS. The CSI configuration for the UE includes CSI resource configuration and CSI reporting configuration. The CSI reporting configuration includes the CSI resource configuration, indicating the CSI resources used for CSI measurement and reporting.

[0092] According to some embodiments of the present disclosure, the BS may configure the CSI resource configuration or CSI reporting configuration associated with the backhaul link. In NR, the CSI resource configuration of the backhaul link may be the IE CSI-ResourcConfig. For example, the CSI resource configuration of the backhaul link may include the identifier of the backhaul link or the frequency information of the backhaul link. For example, the CSI resource configuration of the backhaul link may or may not be associated with any DL BWP of the SN MT.

[0093] In NR, the CSI reporting configuration of the backhaul link may be the IE CSI-ReportConfig. For example, the CSI reporting configuration may include the backhaul link identifier. The backhaul link identifier may be used to indicate in which backhaul link the CSI reporting configuration can be found. The CSI measurement and reporting of the backhaul link may be performed by the SN MT part or the SN forwarding part.

[0094] According to some embodiments of the present disclosure, the SN or the BS may activate semi-static CSI reporting on the PUCCH. The MAC CE may be used to activate semi-static CSI reporting on the PUCCH. Here, the MAC CE may be defined as activating semi-static CSI reporting for the backhaul link. The defined MAC CE may include information indicating that the MAC CE is to activate the semi-persistent CSI reporting configuration for the backhaul link.

[0095] For example, the MAC CE may include a backhaul link identifier. The backhaul link identifier may be used to indicate which backhaul link the MAC CE is applied to. The MAC CE may include an activation / deactivation status indicator for the semi-persistent CSI report configuration. The MAC CE may be transmitted from the BS to the SN MT. The SN may activate or deactivate the semi-persistent CSI report configuration according to the MAC CE.

[0096] For example, the SN may indicate to the BS whether the SN supports at least one of the following capabilities: whether the SN supports CSI reporting for the backhaul link; whether the SN supports CSI reporting for the backhaul link outside the active BWP of the SN MT; and / or whether the SN supports CSI reporting for the backhaul link outside the carrier frequency of the serving cell of the SN MT.

[0097] Therefore, the BS may configure CSI resources and CSI report configurations for the backhaul link respectively. Then, the BS may configure CSI resources different from the control link for the backhaul link. The BS may configure a CSI reporting period different from the control link. For example, the BS may configure a smaller period for the backhaul link.

[0098] For the purpose of uplink channel state estimation, the UE may be configured to transmit SRS, the BS may use the SRS to estimate the uplink channel state, and use the estimation in link adaptation.

[0099] According to some embodiments of the present disclosure, the BS may configure an SRS configuration for the backhaul link.

[0100] The SRS configuration of the backhaul link may be transmitted from the BS to the SN MT via an RRC message. The SN may perform SRS transmission according to the SRS configuration of the backhaul link. The SRS transmission of the backhaul link may be performed by the SN MT part or the SN forwarding part. The SRS configuration of the backhaul link may be associated with the uplink (UL) BWP configured for the SN MT. In this case, when the associated UL BWP is activated, the SRS configuration of the backhaul link may be applied.

[0101] Alternatively, the SRS configuration of the backhaul link may not be associated with any specific UL BWP configured for the SN MT. In this case, when any UL BWP of the SN MT is activated, the SRS configuration of the backhaul link may be applied. All UL BWPs may share the same SRS configuration.

[0102] For example, the SRS configuration can be configured in association with the backhaul link. This association can be achieved by including the backhaul link identifier or the frequency information of the backhaul link. In addition, the BS can configure the SRS configuration for more than one backhaul link. These backhaul links can be associated with one control link or one serving cell of the SN MT.

[0103] For example, the SRS configuration of the backhaul link can include a set of SRS configurations dedicated to the backhaul link. In NR, the configuration can be indicated by the IE SRS-Config. The backhaul link information can be added to the IE SRS-Config. In this case, the SRS configuration can be associated with the UL BWP of the SN MT, or may not be associated with any specific UL BWP of the SN MT.

[0104] For example, the SRS configuration of the backhaul link can include a list of SRS resource sets for the backhaul link of the SN MT. The list of SRS resource sets can be dedicated to the backhaul link. In NR, the list of SRS resource sets can include a list of SRS resource sets. In this case, the list of SRS resource sets of the backhaul link can be associated with the UL BWP of the SN MT.

[0105] For example, the SRS configuration of the backhaul link can include the SRS resource set of the backhaul link. The SRS resource set can include a set of SRS resources. In NR, the SRS resource set can include usage information. The usage information can be used to indicate that the SRS resource set is for the backhaul link. In this case, the SRS resource set of the backhaul link can be associated with the UL BWP of the SN MT.

[0106] For example, the SRS configuration of the backhaul link can include the SRS resources of the backhaul link. The SRS resources can include usage information. The usage information can be used to indicate that the SRS resources are for the backhaul link. In this case, the SRS resources for the backhaul link can be associated with the UL BWP of the SN MT.

[0107] For example, the SRS resources for the backhaul link can be periodic, semi-persistent, or aperiodic. To activate the semi-persistent SRS resources of the backhaul link, a MAC CE can be transmitted from the BS to the SN. The MAC CE can be transmitted from the BS to the SN MT. The SN MT can activate or deactivate the semi-persistent SRS resources according to the MAC CE. The MAC CE can include information indicating that the MAC CE is to activate the semi-persistent SRS resources for the backhaul link.

[0108] For example, in the MAC CE, a backhaul link identifier may be included. The backhaul link identifier may be used to indicate the backhaul link to which the SRS resource indicated in the MAC CE belongs. The backhaul link identifier may be used to indicate the backhaul link for which the SRS resource indicated in the MAC CE is activated.

[0109] For example, the SN may indicate to the BS whether it supports at least one of the following capabilities: SRS transmission on the backhaul link and / or SRS configuration on the backhaul link.

[0110] According to the above disclosure, the BS may configure an SRS configuration dedicated to the backhaul link. The BS may provide a set of SRS configurations different from the control link. When configuring the SRS configuration of the backhaul link, the BS may consider the characteristics of the backhaul link. In addition, the method provided above implements SRS configuration for multiple backhaul links.

[0111] According to an embodiment of the present disclosure, in order to be able to manage the backhaul link more flexibly, the BS may transmit configurations of more than one backhaul link to the SN MT. The configuration of the backhaul link may include at least one of the following: an identifier of the backhaul link; frequency information of the backhaul link, which may be the frequency position and bandwidth of the backhaul link; a resource set configuration of the backhaul link, where the resource set may be a set of reference signals (e.g., SSB or CSI-RS); an RLM configuration of the backhaul link; a BFD configuration of the backhaul link; an SRS configuration of the backhaul link; or a CSI reporting configuration on the backhaul link.

[0112] Before the BS configures the SN, the SN MT may indicate one or more SN forwarding frequency information to the BS. The SN forwarding frequency information may include at least one of the following: the magnitude of the forwarding frequency, or the position or starting point of the forwarding frequency. The SN MT may receive an RRC message from the BS and apply the configuration of the backhaul link.

[0113] According to the above disclosure, the BS may manage SN forwarding frequencies that are wider than the carrier frequency of the serving cell of the SN MT. The SN may also define a set of backhaul links based on the SN forwarding frequencies. For each backhaul link, separate RLM, BFD, SRS, and CSI reporting may be configured.

[0114] According to some embodiments of the present disclosure, a wireless communication method is disclosed, which includes: establishing one or more backhaul links between a wireless communication node and the BS; and receiving, by the wireless communication node, first configuration information for performing RLM or BFD on the one or more backhaul links.

[0115] Optionally, for some embodiments of the present disclosure, the wireless communication method may further include performing RLM or BFD by the MT part or the forwarding part of the wireless communication node.

[0116] Optionally, for some embodiments of the present disclosure, receiving the first configuration information for performing the RLM or the BFD on the one or more backhaul links includes: receiving first configuration information to configure a first reference signal for the RLM or the BFD for one or more backhaul links.

[0117] Optionally, for some embodiments of the present disclosure, the first reference signal is outside the active BWP of the MT part of the wireless communication node.

[0118] Optionally, for some embodiments of the present disclosure, the first reference signal is outside the carrier frequency of one or more serving cells of the MT part of the wireless communication node.

[0119] Optionally, for some embodiments of the present disclosure, receiving the first configuration information for the RLM or the BFD further includes establishing a second reference signal for the RLM or the BFD, wherein the first reference signal and the second reference signal are associated with different backhaul links among the one or more backhaul links.

[0120] Optionally, for some embodiments of the present disclosure, the first reference signal and the second reference signal are in different frequency domains.

[0121] Optionally, for some embodiments of the present disclosure, the one or more backhaul links are associated with different reference signals.

[0122] Optionally, for some embodiments of the present disclosure, the first configuration information includes at least one of the following: a reference signal list for the RLM or the BFD, information associated with the one or more backhaul links, or resource set information associated with the one or more backhaul links.

[0123] Optionally, for some embodiments of the present disclosure, the first configuration information includes a TCI state, and the reference signal associated with the TCI state is used for the RLM or the BFD.

[0124] Optionally, for some embodiments of the present disclosure, the first configuration information includes at least one of the following: a signal quality threshold for the RLM or the BFD of the one or more backhaul links; a threshold number of beam failure instances of the one or more backhaul links that will trigger a beam recovery process; a configuration of a beam failure detection timer for the one or more backhaul links; one or more parameters of a radio link failure (RLF); or a timer configuration of the RLF.

[0125] Optionally, for some embodiments of the present disclosure, the signal quality threshold for the RLM or the BFD of the one or more backhaul links is different from the signal quality threshold of the control link between the wireless communication node and the BS.

[0126] Optionally, for some embodiments of the present disclosure, the threshold number of beam failure instances for one or more backhaul links is different from the threshold number of beam failure instances for the control link between the wireless communication node and the BS.

[0127] Optionally, for some embodiments of the present disclosure, the configuration of the beam failure detection timer for one or more backhaul links is different from the configuration of the beam failure detection timer for the control link between the wireless communication node and the BS.

[0128] Optionally, for some embodiments of the present disclosure, the beam failure detection timer for one or more backhaul links is different from the beam failure detection timer for the control link between the wireless communication node and the BS.

[0129] Optionally, for some embodiments of the present disclosure, one or more parameters of the RLF for one or more backhaul links are different from one or more parameters of the RLF for the control link between the wireless communication node and the BS.

[0130] Optionally, for some embodiments of the present disclosure, the timer configuration of the RLF for one or more backhaul links is different from the timer configuration of the RLF for the control link between the wireless communication node and the BS.

[0131] Optionally, for some embodiments of the present disclosure, the method may further include receiving second configuration information of the BFR for one or more backhaul links.

[0132] Optionally, for some embodiments of the present disclosure, the BFR is associated with the same RS as the BFD, and the wireless communication method further includes performing the BFR according to the BFD.

[0133] Optionally, for some embodiments of the present disclosure, the method may further include: in response to the RLF of one or more backhaul links, starting one or more associated timers.

[0134] Optionally, for some embodiments of the present disclosure, the method may further include: when the RLF of the control link is not declared, in response to the occurrence of the RLF of one or more backhaul links, transmitting an RRC message or a MAC CE via the serving cell of the MT part of the wireless communication node to indicate the RLF of one or more backhaul links.

[0135] Optionally, for some embodiments of the present disclosure, the RRC message indicates the failure type of the RLF or the type of the MAC CE corresponding to the failure type of the RLF.

[0136] Optionally, for some embodiments of the present disclosure, the RRC message or the MAC CE includes information about the resource set associated with the RLF.

[0137] Optionally, for some embodiments of the present disclosure, the RRC message or the MAC CE includes information on one or more backhaul links where RLF occurs, wherein the information on one or more backhaul links includes at least one of the following: frequency information of one or more backhaul links or identifiers of one or more backhaul links.

[0138] Optionally, for some embodiments of the present disclosure, the method may further include: when the BFD announces beam failure, transmitting a MAC CE or an RRC message on the serving cell of the MT part of the wireless communication node to indicate the occurrence of beam failure.

[0139] Optionally, for some embodiments of the present disclosure, the MAC CE or the RRC message includes one or more candidate RSs to which one or more backhaul links can switch.

[0140] Optionally, for some embodiments of the present disclosure, the RRC message or the MAC CE includes information on one or more backhaul links where beam failure occurs, wherein the information on one or more backhaul links includes at least one of the following: frequency information of one or more backhaul links or identifiers of one or more backhaul links.

[0141] Optionally, for some embodiments of the present disclosure, the method may further include: when beam failure is detected on the backhaul link and the control link between the BS and the wireless communication node, initiating a RACH procedure according to the BFR configuration.

[0142] Optionally, for some embodiments of the present disclosure, the method may further include the wireless communication node notifying the BS of at least one of the following capabilities of the wireless communication node: whether the wireless communication node supports RLM of the backhaul link; whether the wireless communication node supports BFD of the backhaul link; whether the wireless communication node supports RLM of one or more backhaul links outside the active BWP of the MT part of the wireless communication node; whether the wireless communication node supports BFD of one or more backhaul links outside the active BWP of the MT part of the wireless communication node; whether the wireless communication node supports RLM of one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; whether the wireless communication node supports BFD of one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; whether the wireless communication node supports CSI reporting of one or more backhaul links; whether the wireless communication node supports CSI reporting of one or more backhaul links outside the active BWP of the MT part of the wireless communication node; whether the wireless communication node supports CSI reporting of one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; whether the wireless communication node supports transmission of SRS; or whether the wireless communication node supports SRS configuration of one or more backhaul links.

[0143] Optionally, for some embodiments of the present disclosure, the method may further include receiving CSI configuration information of CSI resources or CSI reports of one or more backhaul links.

[0144] Optionally, for some embodiments of the present disclosure, the CSI resource configuration information includes at least one of the following: identifiers of one or more backhaul links or frequency information of one or more backhaul links.

[0145] Optionally, for some embodiments of the present disclosure, the CSI configuration information includes identifiers of one or more backhaul links, where the identifiers are used to indicate in which backhaul link the CSI resource configuration is located.

[0146] Optionally, for some embodiments of the present disclosure, the method may further include measuring and reporting, by an MT part or a forwarding part of a wireless communication node, the channel state of one or more backhaul links.

[0147] Optionally, for some embodiments of the present disclosure, the method may further include transmitting a MAC CE to the BS to activate semi-static CSI reporting or semi-persistent SRS resources of one or more backhaul links.

[0148] Optionally, for some embodiments of the present disclosure, the MAC CE includes at least one of the following: an indication indicating that the MAC CE is to activate semi-static CSI reporting; identifiers of one or more backhaul links; or status information indicating whether the semi-static CSI reporting function is currently active.

[0149] Optionally, for some embodiments of the present disclosure, the method may further include receiving SRS configuration information for SRS configuration of one or more backhaul links.

[0150] Optionally, for some embodiments of the present disclosure, the method may further include transmitting SRS by an MT part or a forwarding part of a wireless communication node.

[0151] Optionally, for some embodiments of the present disclosure, the SRS configuration information includes at least one of a backhaul link identifier or frequency information of one or more backhaul links.

[0152] Optionally, for some embodiments of the present disclosure, the method may further include receiving, by a wireless communication node, second configuration information of one or more backhaul links, where the second configuration information includes at least one of the following:

[0153] identifiers of one or more backhaul links; frequency information of one or more backhaul links; resource set information of one or more backhaul links; or RLM, BFD, SRS, or CSI reporting configurations of one or more backhaul links.

[0154] Optionally, for some embodiments of the present disclosure, the frequency information of one or more backhaul links includes the frequency position information or bandwidth information of one or more backhaul links, and the resource set information includes a set of reference signals.

[0155] Optionally, for some embodiments of the present disclosure, the method may further include a wireless communication node indicating a set or multiple sets of forwarding frequency information of the wireless communication node to the BS.

[0156] Optionally, for some embodiments of the present disclosure, the set or multiple sets of forwarding frequency information includes at least one of the magnitude of the forwarding frequency, the position of the forwarding frequency, or the starting point of the forwarding frequency.

[0157] According to some embodiments of the present disclosure, a wireless communication method is disclosed, including: establishing one or more backhaul links between a wireless communication node and a BS; and the BS sending first configuration information for the wireless communication node to perform RLM or BFD on the one or more backhaul links.

[0158] Optionally, for some embodiments of the present disclosure, RLM or BFD is performed by the MT part or the forwarding part of the wireless communication node.

[0159] Optionally, for some embodiments of the present disclosure, sending the first configuration information includes: sending the first configuration information to configure a first reference signal for RLM or BFD of one or more backhaul links.

[0160] Optionally, for some embodiments of the present disclosure, the first reference signal is outside the active BWP of the MT part of the wireless communication node.

[0161] Optionally, for some embodiments of the present disclosure, the first reference signal is outside the carrier frequency of one or more serving cells of the MT part of the wireless communication node.

[0162] Optionally, for some embodiments of the present disclosure, sending the first configuration information further includes establishing a second reference signal for RLM or BFD, where the first reference signal and the second reference signal are associated with different backhaul links among the one or more backhaul links.

[0163] Optionally, for some embodiments of the present disclosure, the first reference signal and the second reference signal are in different frequency domains.

[0164] Optionally, for some embodiments of the present disclosure, one or more backhaul links are associated with different reference signals.

[0165] Optionally, for some embodiments of the present disclosure, the first configuration information includes at least one of the following: a reference signal list for RLM or BFD, information associated with one or more backhaul links, or resource set information associated with one or more backhaul links.

[0166] Optionally, for some embodiments of the present disclosure, the first configuration information includes a TCI state, and the reference signal associated with the TCI state is used for RLM or BFD.

[0167] Optionally, for some embodiments of the present disclosure, the first configuration information includes at least one of the following: a signal quality threshold for RLM or BFD of one or more backhaul links; a threshold number of beam failure instances of one or more backhaul links that will trigger a beam recovery process; a configuration of a beam failure detection timer for one or more backhaul links; one or more parameters of a radio link failure (RLF); and a timer configuration of the RLF.

[0168] Optionally, for some embodiments of the present disclosure, the signal quality threshold for RLM or BFD of one or more backhaul links is different from the signal quality threshold of the control link between the wireless communication node and the BS.

[0169] Optionally, for some embodiments of the present disclosure, the threshold number of beam failure instances of one or more backhaul links is different from the threshold number of beam failure instances of the control link between the wireless communication node and the BS.

[0170] Optionally, for some embodiments of the present disclosure, the configuration of the beam failure detection timer for one or more backhaul links is different from the configuration of the beam failure detection timer of the control link between the wireless communication node and the BS.

[0171] Optionally, for some embodiments of the present disclosure, the beam failure detection timer for one or more backhaul links is different from the beam failure detection timer of the control link between the wireless communication node and the BS.

[0172] Optionally, for some embodiments of the present disclosure, one or more parameters of the RLF of one or more backhaul links are different from one or more parameters of the RLF of the control link between the wireless communication node and the BS.

[0173] Optionally, for some embodiments of the present disclosure, the timer configuration of the RLF of one or more backhaul links is different from the timer configuration of the RLF of the control link between the wireless communication node and the BS.

[0174] Optionally, for some embodiments of the present disclosure, the method may further include sending second configuration information of the BFR for one or more backhaul links.

[0175] Optionally, for some embodiments of the present disclosure, the same RS of the BFR is associated with the BFD, and the wireless communication method further includes performing the BFR according to the BFD.

[0176] Optionally, for some embodiments of the present disclosure, the method may further include: configuring the wireless communication node to start one or more associated timers in response to the RLF of one or more backhaul links.

[0177] Optionally, for some embodiments of the present disclosure, the method may further include: when the RLF of the control link is not declared, in response to the occurrence of the RLF of one or more backhaul links, transmitting an RRC message or a MAC CE via the serving cell of the MT part of the wireless communication node to indicate the RLF of one or more backhaul links.

[0178] Optionally, for some embodiments of the present disclosure, the RRC message indicates the failure type of the RLF or the type of the MAC CE corresponding to the failure type of the RLF.

[0179] Optionally, for some embodiments of the present disclosure, the RRC message or the MAC CE includes information about the resource set associated with the RLF.

[0180] Optionally, for some embodiments of the present disclosure, the RRC message or the MAC CE includes information about one or more backhaul links where the RLF occurs, where the information about one or more backhaul links includes at least one of the following: frequency information of one or more backhaul links or identifiers of one or more backhaul links.

[0181] Optionally, for some embodiments of the present disclosure, the method may further include: when the BFD declares beam failure, transmitting a MAC CE or an RRC message on the serving cell of the MT part of the wireless communication node to indicate the occurrence of the beam failure.

[0182] Optionally, for some embodiments of the present disclosure, the MAC CE or the RRC message includes candidate RSs to which one or more backhaul links can switch.

[0183] Optionally, for some embodiments of the present disclosure, the RRC message or the MAC CE includes information about one or more backhaul links of the beam failure, where the information about one or more backhaul links includes at least one of the following: frequency information of one or more backhaul links or identifiers of one or more backhaul links.

[0184] Optionally, for some embodiments of the present disclosure, the method may further include: when beam failure is detected on the backhaul link and the control link between the BS and the wireless communication node, initiating a RACH process according to the BFR configuration.

[0185] Optionally, for some embodiments of the present disclosure, the method may further include receiving information on at least one of the following capabilities of a wireless communication node: whether the wireless communication node supports RLM for a backhaul link; whether the wireless communication node supports BFD for a backhaul link; whether the wireless communication node supports RLM for one or more backhaul links outside the active BWP of the MT part of the wireless communication node; whether the wireless communication node supports BFD for one or more backhaul links outside the active BWP of the MT part of the wireless communication node; whether the wireless communication node supports RLM for one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; whether the wireless communication node supports BFD for one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; whether the wireless communication node supports CSI reporting for one or more backhaul links; whether the wireless communication node supports CSI reporting for one or more backhaul links outside the active BWP of the MT part of the wireless communication node; whether the wireless communication node supports CSI reporting for one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; whether the wireless communication node supports the transmission of SRS; or whether the wireless communication node supports the configuration of SRS for one or more backhaul links.

[0186] Optionally, for some embodiments of the present disclosure, the method may further include sending CSI configuration information for CSI resources or CSI reports for one or more backhaul links.

[0187] Optionally, for some embodiments of the present disclosure, the CSI resource configuration information includes at least one of the following: identifiers of one or more backhaul links or frequency information of one or more backhaul links.

[0188] Optionally, for some embodiments of the present disclosure, the CSI configuration information includes identifiers of one or more backhaul links, where the identifiers are used to indicate in which backhaul link the CSI resource configuration is located.

[0189] Optionally, for some embodiments of the present disclosure, the method may further include configuring the wireless communication node to measure and report the channel state of one or more backhaul links by the MT part or the forwarding part of the wireless communication node.

[0190] Optionally, for some embodiments of the present disclosure, the method may further include the BS receiving a MAC CE to activate semi-static CSI reporting or semi-persistent SRS resources for one or more backhaul links.

[0191] Optionally, for some embodiments of the present disclosure, the MAC CE includes at least one of the following: an indication indicating that the MAC CE is to activate semi-static CSI reporting; an identifier of one or more backhaul links; or status information indicating whether the semi-static CSI reporting function is currently active.

[0192] Optionally, for some embodiments of the present disclosure, the method may further include transmitting SRS configuration information for SRS configuration of one or more backhaul links.

[0193] Optionally, for some embodiments of the present disclosure, the method may further include receiving SRS from the MT part or the forwarding part of the wireless communication node.

[0194] Optionally, for some embodiments of the present disclosure, the SRS configuration information includes at least one of a backhaul link identifier or frequency information of one or more backhaul links.

[0195] Optionally, for some embodiments of the present disclosure, the method may further include transmitting second configuration information of the backhaul link, where the second configuration information includes at least one of the following:

[0196] an identifier of one or more backhaul links; frequency information of one or more backhaul links; resource set information of one or more backhaul links; or RLM, BFD, SRS, or CSI reporting configuration of one or more backhaul links.

[0197] Optionally, for some embodiments of the present disclosure, the frequency information of one or more backhaul links includes frequency position information or bandwidth information of one or more backhaul links, and the resource set information includes a set of reference signals.

[0198] Optionally, for some embodiments of the present disclosure, the method may further include receiving information about one or more sets of forwarding frequency information of the wireless communication node to the BS.

[0199] Optionally, for some embodiments of the present disclosure, one or more sets of forwarding frequency information includes at least one of the size of the forwarding frequency, the position of the forwarding frequency, or the starting point of the forwarding frequency.

[0200] According to some embodiments of the present disclosure, a wireless communication device is disclosed. The device includes a memory storing one or more programs and one or more processors electrically coupled to the memory and configured to execute the one or more programs to perform any disclosed method, step, aspect, and combinations thereof.

[0201] In accordance with some embodiments of the present disclosure, a non-transitory computer-readable storage medium is disclosed. The medium stores one or more programs that are configured to, when executed by a processor, cause the execution of any disclosed method, step, aspect, and combinations thereof.

[0202] Various exemplary embodiments of the present disclosure are described herein with reference to the accompanying drawings so that those of ordinary skill in the art can make and use the present disclosure. The present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the particular order and / or hierarchy of steps in the methods disclosed herein are merely exemplary methods. Based on design preferences, the particular order or hierarchy of steps of the disclosed method or process can be rearranged while remaining within the scope of the present disclosure. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in an exemplary order, and the present disclosure is not limited to the particular order or hierarchy presented, unless otherwise expressly stated.

[0203] The present disclosure is intended to cover any conceivable variations, uses, combinations, or adaptations of the present disclosure that follow the general principles of the present disclosure, and includes knowledge and conventional technical means known in the art as well as content not disclosed in this application.

[0204] It should be understood that the present disclosure is not limited to the exact structures or operations described above and shown in the drawings, and various modifications and variations can be made without departing from the scope of this application. The scope of this application is limited only by the appended claims.

[0205] The methods, devices, processes, circuits, and logics described above can be implemented in many different ways and in many different combinations of hardware and software. For example, all or part of the implementation can be a circuit including an instruction processor or controller, such as a Central Processing Unit (CPU), a microcontroller, or a microprocessor; or implemented as an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or a Field Programmable Gate Array (FPGA); or implemented as a circuit including discrete logic or other circuit components, including analog circuit components, digital circuit components, or both; or any combination thereof. For example, the circuit can include discrete interconnected hardware components, or can be combined on a single integrated circuit die, distributed among multiple integrated circuit dies, or implemented in a Multi-Chip Module (MCM) of multiple integrated circuit dies in a common package.

[0206] Accordingly, the circuit can store or access instructions for execution, or can implement its functions solely in hardware. The instructions can be stored in a tangible storage medium, which is different from transient signals, such as flash memory, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM); or on a magnetic disk or optical disk, such as compact disc read only memory (CDROM), hard disk drive (HDD), or other magnetic or optical disk; or in or on another machine-readable medium. Products such as computer program products can include a storage medium and instructions stored in or on the medium, and when executed by the circuit in a device, these instructions can cause the device to implement any of the processes described above or shown in the drawings.

[0207] These implementations can be distributed. For example, the circuit can include multiple different system components, such as multiple processors and memories, and can span multiple distributed processing systems. Parameters, databases, and other data structures can be stored and managed separately, can be combined into a single memory or database, can be organized logically and physically in many different ways, and can be implemented in many different ways. Example implementations include linked lists, program variables, hash tables, arrays, records (e.g., database records), objects, and implicit storage mechanisms. The instructions can form part of a single program (e.g., a subroutine or other code segment), can form multiple separate programs, can be distributed across multiple memories and processors, and can be implemented in many different ways. Example implementations include stand-alone programs, and as part of a library, such as a shared library like a dynamic link library (DLL). For example, the library can contain shared data and one or more shared programs, which include instructions that, when executed by the circuit, perform any of the processes described above or shown in the drawings.

[0208] In some examples, each unit, subunit, and / or module of the system can include a logic component. Each logic component can be hardware or a combination of hardware and software. For example, each logic component can include an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), digital logic circuitry, analog circuitry, a combination of discrete circuitry, gates, or any other type of hardware or a combination thereof. Alternatively or additionally, each logic component can include memory hardware, e.g., a portion of a memory that includes instructions executable by a processor or other processing unit to implement one or more features of the logic component. When any one logic component includes a memory portion that contains processor-executable instructions, the logic component can include or not include a processor. In some examples, each logic component can simply be a portion of a memory or other physical memory that includes instructions executable by a processor or other processing unit to implement the features of the corresponding logic component, and the logic component does not include any other hardware. Because each logic component includes at least some hardware, even if the included hardware includes software, each logic component can be interchangeably referred to as a hardware logic component.

[0209] A second action can be said to be “responsive to” a first action, regardless of whether the second action is directly or indirectly caused by the first action. The second action can occur at a much later time than the first action and still be responsive to the first action. Similarly, even if intermediate actions occur between the first action and the second action, and even if one or more intermediate actions directly cause the execution of the second action, the second action can still be said to be a response to the first action. For example, if the first action sets a flag, the second action can be responsive to the first action, and whenever the flag is set, a third action later initiates the second action.

[0210] To clarify usage and thereby provide notice to the public, the phrase “at least one” 、 , …… and <n>"or" at least one< / n> 、 ,... and / or <n>"or combinations thereof" is defined by the applicant in the broadest sense and replaces any other implicit definition above or below, unless the applicant clearly states the contrary, to mean one or more elements selected from the group consisting of A, B, ... and N. In other words, these phrases mean any combination of one or more of the elements A, B, ... or N, including any one element alone, or a combination of one element with one or more other elements, which may also include other elements not listed in the combination.< / n>

Claims

1. A wireless communication method, comprising: Establishing one or more backhaul links between a wireless communication node and a base station BS; And Receiving, by the wireless communication node, first configuration information for performing radio link monitoring (RLM) or beam failure detection (BFD) on the one or more backhaul links.

2. The wireless communication method according to claim 1 further includes: Performing the RLM or the BFD by a mobile terminal (MT) part or a forwarding part of the wireless communication node.

3. The wireless communication method according to claim 1, wherein, Receiving the first configuration information for performing the RLM or the BFD on the one or more backhaul links includes: receiving the first configuration information to configure a first reference signal for the RLM or the BFD of the one or more backhaul links.

4. The wireless communication method according to claim 3, wherein, The first reference signal is outside an active bandwidth part (BWP) of a mobile terminal (MT) part of the wireless communication node.

5. The wireless communication method according to claim 3, wherein, The first reference signal is outside a carrier frequency of one or more serving cells of a mobile terminal (MT) part of the wireless communication node.

6. The wireless communication method according to claim 3, wherein, Receiving the first configuration information for performing the RLM or the BFD on the one or more backhaul links further includes: establishing a second reference signal for the RLM or the BFD, wherein the first reference signal and the second reference signal are associated with different backhaul links among the one or more backhaul links.

7. The wireless communication method according to claim 6, wherein, The first reference signal and the second reference signal are in different frequency domains.

8. The wireless communication method according to claim 1, wherein The one or more backhaul links are associated with different reference signals.

9. The wireless communication method according to claim 1, wherein The first configuration information includes at least one of the following: a reference signal list for the RLM or the BFD, information associated with the one or more backhaul links, or resource set information associated with the one or more backhaul links.

10. The wireless communication method according to claim 1, wherein, The first configuration information includes a transmission configuration indicator (TCI) state, and a reference signal associated with the TCI state is used for the RLM or the BFD.

11. The wireless communication method according to claim 1, wherein, The first configuration information includes at least one of the following: A signal quality threshold for the RLM or the BFD of the one or more backhaul links; A threshold number of beam failure instances of the one or more backhaul links that will trigger a beam recovery process; A configuration of a beam failure detection timer for the one or more backhaul links; One or more parameters of a radio link failure (RLF); or A timer configuration of the RLF.

12. The wireless communication method according to claim 11, wherein: The signal quality threshold for the RLM or the BFD of the one or more backhaul links is different from a signal quality threshold of a control link between the wireless communication node and the BS; The threshold number of beam failure instances of the one or more backhaul links is different from a threshold number of beam failure instances of a control link between the wireless communication node and the BS; The configuration of the beam failure detection timer for the one or more backhaul links is different from a configuration of a beam failure detection timer of a control link between the wireless communication node and the BS; The beam failure detection timer of the one or more backhaul links is different from the beam failure detection timer of the control link between the wireless communication node and the BS; One or more parameters of the RLF of the one or more backhaul links are different from one or more parameters of the RLF of the control link between the wireless communication node and the BS; Or The timer configuration of the RLF of the one or more backhaul links is different from the timer configuration of the RLF of the control link between the wireless communication node and the BS.

13. The wireless communication method according to claim 1 further comprises: Receive second configuration information of beam failure recovery (BFR) of the one or more backhaul links.

14. The wireless communication method according to claim 13, wherein, The BFR is associated with the same reference signal (RS) as the BFD, and the wireless communication method further includes: performing the BFR according to the BFD.

15. The wireless communication method according to claim 1 further includes: In response to a radio link failure (RLF) of the one or more backhaul links, start one or more associated timers.

16. The wireless communication method according to claim 1 further comprises: When the RLF of the control link is not declared, in response to the occurrence of the RLF of the one or more backhaul links, transmit a radio resource control (RRC) message or a media access control control element (MAC CE) via the serving cell of the mobile terminal (MT) part of the wireless communication node to indicate the RLF of the one or more backhaul links.

17. The wireless communication method according to claim 16, wherein, The RRC message indicates the failure type of the RLF or the type of the MAC CE corresponding to the failure type of the RLF.

18. The wireless communication method according to claim 16, wherein, The RRC message or the MAC CE includes information on a resource set associated with the RLF.

19. The wireless communication method according to claim 16, wherein, The RRC message or the MAC CE includes information on the one or more backhaul links where the RLF occurs, wherein the information on the one or more backhaul links includes at least one of the following: frequency information of the one or more backhaul links or an identifier of the one or more backhaul links.

20. The wireless communication method according to claim 1 further includes: When the BFD declares beam failure, transmit a media access control control element (MAC CE) or a radio resource control (RRC) message on the serving cell of the mobile terminal (MT) part of the wireless communication node to indicate the occurrence of the beam failure.

21. The wireless communication method according to claim 20, wherein, The MAC CE or the RRC message includes candidate reference signals (RSs) to which the one or more backhaul links can switch.

22. The wireless communication method according to claim 20, wherein, The RRC message or the MAC CE includes information on the one or more backhaul links of the beam failure, wherein the information on the one or more backhaul links includes at least one of the following: frequency information of the one or more backhaul links or an identifier of the one or more backhaul links.

23. The wireless communication method according to claim 1 further comprises: When beam failure is detected on the backhaul link and the control link between the BS and the wireless communication node, initiate a random access (RACH) procedure according to a beam failure recovery (BFR) configuration.

24. The wireless communication method according to claim 1, further includes the wireless communication node notifying the BS of at least one of the following capabilities of the wireless communication node: Whether the wireless communication node supports RLM of the backhaul link; Whether the wireless communication node supports BFD of the backhaul link; Whether the wireless communication node supports RLM for the one or more backhaul links outside the active bandwidth part (BWP) of the mobile terminal (MT) part of the wireless communication node; Whether the wireless communication node supports BFD for the one or more backhaul links outside the active BWP of the MT part of the wireless communication node; Whether the wireless communication node supports RLM for the one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; Whether the wireless communication node supports BFD for the one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; Whether the wireless communication node supports channel state information (CSI) reporting for the one or more backhaul links; Whether the wireless communication node supports CSI reporting for the one or more backhaul links outside the active BWP of the MT part of the wireless communication node; Whether the wireless communication node supports CSI reporting for the one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; Whether the wireless communication node supports the transmission of sounding reference signals (SRS); or Whether the wireless communication node supports SRS configuration for the one or more backhaul links.

25. The wireless communication method according to claim 1 further includes: Receiving CSI configuration information for the channel state information (CSI) resources or CSI reports of the one or more backhaul links.

26. The wireless communication method according to claim 25, wherein, The CSI resource configuration information includes at least one of the following: the identifier of the one or more backhaul links or the frequency information of the one or more backhaul links.

27. The wireless communication method according to claim 26, wherein, The CSI configuration information includes the identifier of the one or more backhaul links, where the identifier is used to indicate in which backhaul link the CSI resource configuration is located.

28. The wireless communication method according to claim 1 further comprises: Measuring and reporting the channel state of the one or more backhaul links by the mobile terminal (MT) part or the forwarding part of the wireless communication node.

29. The wireless communication method according to claim 1 further includes: Transmitting a media access control control element (MAC CE) to the base station (BS) to activate semi-static channel state information (CSI) reporting or semi-persistent sounding reference signal (SRS) resources for the one or more backhaul links.

30. The wireless communication method according to claim 29, wherein, The MAC CE includes at least one of the following: an indication indicating that the MAC CE is to activate the semi-static CSI reporting; the identifier of the one or more backhaul links; or status information indicating whether the semi-static CSI reporting function is currently active.

31. The wireless communication method according to claim 1 further comprises: Receiving SRS configuration information for the sounding reference signal (SRS) configuration of the one or more backhaul links.

32. The wireless communication method according to claim 31 further includes: Transmitting SRS by the mobile terminal (MT) part or the forwarding part of the wireless communication node.

33. The wireless communication method according to claim 31, wherein, The SRS configuration information includes at least one of the backhaul link identifier or frequency information of the one or more backhaul links.

34. The wireless communication method according to claim 1 further comprises receiving, by the wireless communication node, second configuration information of the one or more backhaul links, wherein, The second configuration information includes at least one of the following: The identifier of the one or more backhaul links; The frequency information of the one or more backhaul links; The resource set information of the one or more backhaul links; Or RLM, BFD, sounding reference signal (SRS), or channel state information (CSI) reporting configuration for the one or more backhaul links.

35. The wireless communication method according to claim 34, wherein, The frequency information for the one or more backhaul links includes frequency position information or bandwidth information for the one or more backhaul links, and the resource set information includes a set of reference signals.

36. The wireless communication method according to claim 1 further includes: The wireless communication node indicates to the BS one or more sets of forwarding frequency information of the wireless communication node.

37. The wireless communication method according to claim 36, wherein, The one or more sets of forwarding frequency information includes at least one of the magnitude of the forwarding frequency, the position of the forwarding frequency, or the starting point of the forwarding frequency.

38. A wireless communication method, comprising: Establishing one or more backhaul links between a wireless communication node and a base station (BS); And The BS sending first configuration information for the wireless communication node to perform radio link monitoring (RLM) or beam failure detection (BFD) on the one or more backhaul links.

39. The wireless communication method according to claim 38, wherein, The RLM or the BFD is performed by a mobile terminal (MT) part or a forwarding part of the wireless communication node.

40. The wireless communication method according to claim 38, wherein, Sending the first configuration information includes: sending the first configuration information to configure a first reference signal for the RLM or the BFD for the one or more backhaul links.

41. The wireless communication method according to claim 40, wherein, The first reference signal is outside the active bandwidth part (BWP) of the mobile terminal (MT) part of the wireless communication node.

42. The wireless communication method according to claim 40, wherein, The first reference signal is outside the carrier frequency of one or more serving cells of the mobile terminal (MT) part of the wireless communication node.

43. The wireless communication method according to claim 40, wherein, Sending the first configuration information further includes: establishing a second reference signal for the RLM or the BFD, wherein the first reference signal and the second reference signal are associated with different backhaul links among the one or more backhaul links.

44. The wireless communication method according to claim 43, wherein, The first reference signal and the second reference signal are in different frequency domains.

45. The wireless communication method according to claim 38, wherein, The one or more backhaul links are associated with different reference signals.

46. The wireless communication method according to claim 38, wherein, The first configuration information includes at least one of the following: a reference signal list for the RLM or the BFD, information associated with the one or more backhaul links, or resource set information associated with the one or more backhaul links.

47. The wireless communication method according to claim 38, wherein, The first configuration information includes a transmission configuration indicator (TCI) state, and the reference signal associated with the TCI state is used for the RLM or the BFD.

48. The wireless communication method according to claim 38, wherein, The first configuration information includes at least one of the following: A signal quality threshold for the RLM or the BFD of the one or more backhaul links; A threshold number of beam failure instances for the one or more backhaul links that will trigger a beam recovery process; Configuration of a beam failure detection timer for the one or more backhaul links; One or more parameters of a radio link failure (RLF); and A timer configuration for the RLF.

49. The wireless communication method according to claim 48, wherein: The signal quality threshold for the RLM or the BFD of the one or more backhaul links is different from the signal quality threshold of a control link between the wireless communication node and the BS; The threshold number of beam failure instances of the one or more backhaul links is different from the threshold number of beam failure instances of the control link between the wireless communication node and the BS; The configuration of the beam failure detection timer of the one or more backhaul links is different from the configuration of the beam failure detection timer of the control link between the wireless communication node and the BS; The beam failure detection timer of the one or more backhaul links is different from the beam failure detection timer of the control link between the wireless communication node and the BS; One or more parameters of the RLF of the one or more backhaul links are different from one or more parameters of the RLF of the control link between the wireless communication node and the BS; Or The timer configuration of the RLF of the one or more backhaul links is different from the timer configuration of the RLF of the control link between the wireless communication node and the BS.

50. The wireless communication method according to claim 38 further comprises: Transmit second configuration information for beam failure recovery BFR of the one or more backhaul links.

51. The wireless communication method according to claim 50, wherein, The BFR is associated with the same reference signal RS as the BFD, and the wireless communication method further includes: performing the BFR according to the BFD.

52. The wireless communication method according to claim 38 further includes: Configure the wireless communication node to start one or more associated timers in response to a radio link failure RLF of the one or more backhaul links.

53. The wireless communication method according to claim 38 further comprises: When a radio link failure RLF of the control link is not declared, in response to the occurrence of the RLF of the one or more backhaul links, transmit a radio resource control RRC message or a media access control control element MAC CE via the serving cell of the mobile terminal MT part of the wireless communication node to indicate the RLF of the one or more backhaul links.

54. The wireless communication method according to claim 53, wherein, The RRC message indicates the type of failure of the RLF or the type of MAC CE corresponding to the type of failure of the RLF.

55. The wireless communication method according to claim 53, wherein, The RRC message or the MAC CE includes information on a resource set associated with the RLF.

56. The wireless communication method according to claim 53, wherein, The RRC message or the MAC CE includes information on the one or more backhaul links where the RLF occurs, where the information on the one or more backhaul links includes at least one of the following: frequency information of the one or more backhaul links or an identifier of the one or more backhaul links.

57. The wireless communication method according to claim 38 further comprises: When the BFD declares beam failure, transmit a media access control control element MAC CE or a radio resource control RRC message on the serving cell of the mobile terminal MT part of the wireless communication node to indicate the occurrence of the beam failure.

58. The wireless communication method according to claim 57, wherein, The MAC CE or the RRC message includes candidate reference signals RS to which the one or more backhaul links can switch.

59. The wireless communication method according to claim 57, wherein, The RRC message or the MAC CE includes information on the one or more backhaul links of the beam failure, where the information on the one or more backhaul links includes at least one of the following: frequency information of the one or more backhaul links or an identifier of the one or more backhaul links.

60. The wireless communication method according to claim 38 further includes: When a beam failure is detected on the backhaul link and the control link between the BS and the wireless communication node, initiate a random access RACH procedure according to the beam failure recovery BFR configuration.

61. The wireless communication method according to claim 38, further comprising receiving information on at least one of the following capabilities of the wireless communication node: Whether the wireless communication node supports RLM for the backhaul link; Whether the wireless communication node supports BFD for the backhaul link; Whether the wireless communication node supports RLM for one or more backhaul links outside the active bandwidth part BWP of the mobile terminal MT part of the wireless communication node; Whether the wireless communication node supports BFD for one or more backhaul links outside the active BWP of the MT part of the wireless communication node; Whether the wireless communication node supports RLM for one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; Whether the wireless communication node supports BFD for one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; Whether the wireless communication node supports channel state information CSI reporting for the one or more backhaul links; Whether the wireless communication node supports CSI reporting for one or more backhaul links outside the active BWP of the MT part of the wireless communication node; Whether the wireless communication node supports CSI reporting for one or more backhaul links outside the carrier frequency of the serving cell of the MT part of the wireless communication node; Whether the wireless communication node supports the transmission of sounding reference signals SRS; or Whether the wireless communication node supports SRS configuration for the one or more backhaul links.

62. The wireless communication method according to claim 38 further comprises: Transmit CSI configuration information for the channel state information CSI resources or CSI reports of the one or more backhaul links.

63. The wireless communication method according to claim 62, wherein, The CSI resource configuration information includes at least one of the following: identifiers of the one or more backhaul links or frequency information of the one or more backhaul links.

64. The wireless communication method according to claim 62, wherein, The CSI configuration information includes identifiers of the one or more backhaul links, where the identifiers are used to indicate in which backhaul link the CSI resource configuration is located.

65. The wireless communication method according to claim 38 further includes: Configure the wireless communication node to measure and report the channel state of the one or more backhaul links by the mobile terminal MT part or the forwarding part of the wireless communication node.

66. The wireless communication method according to claim 38 further comprises: Receive a media access control control element MAC CE by the BS to activate semi-static channel state information CSI reporting or semi-persistent sounding reference signal SRS resources for the one or more backhaul links.

67. The wireless communication method according to claim 66, wherein, The MAC CE includes at least one of the following: an indication indicating that the MAC CE is to activate the semi-static CSI reporting; identifiers of the one or more backhaul links; or status information indicating whether the semi-static CSI reporting function is currently active.

68. The wireless communication method according to claim 38 further comprises: Transmit SRS configuration information for the sounding reference signal SRS configuration of the one or more backhaul links.

69. The wireless communication method according to claim 68 further comprises: Receive sounding reference signals (SRS) from a mobile terminal (MT) part or a forwarding part of the wireless communication node.

70. The wireless communication method according to claim 68, wherein, The SRS configuration information includes at least one of a backhaul link identifier or frequency information of the one or more backhaul links.

71. The wireless communication method according to claim 38 further includes sending second configuration information of the one or more backhaul links, wherein, The second configuration information includes at least one of the following: Identifiers of the one or more backhaul links; Frequency information of the one or more backhaul links; Resource set information of the one or more backhaul links; Or RLM, BFD, sounding reference signal (SRS), or channel state information (CSI) reporting configurations of the one or more backhaul links.

72. The wireless communication method according to claim 71, wherein, The frequency information of the one or more backhaul links includes frequency position information or bandwidth information of the one or more backhaul links, and the resource set information includes a set of reference signals.

73. The wireless communication method according to claim 38 further includes: Receive information on one or more sets of forwarding frequency information of the wireless communication node to the BS.

74. The wireless communication method according to claim 73, wherein, The one or more sets of forwarding frequency information include at least one of the magnitude of the forwarding frequency, the position of the forwarding frequency, or the starting point of the forwarding frequency.

75. A wireless communication device includes a memory storing one or more programs and one or more processors electrically coupled to the memory and configured to execute the one or more programs to perform the method according to any one of claims 1 to 74.

76. A non-transitory computer-readable storage medium storing one or more programs, the one or more programs being configured to, when executed by a processor, cause the execution of the method according to any one of claims 1 to 74.

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