Method, apparatus, relay equipment, and network-side equipment for determining the transmission configuration of a backhaul link.

Abstract

This application discloses a method, apparatus, relay device, and network-side device for determining a transmission configuration of a backhaul link, belonging to the communication field. The method for determining the transmission configuration of the backhaul link according to the embodiments of this application includes that the relay device obtains a set of candidate beams that can be configured for the control link, and the relay device determines a transmission configuration indication (TCI) configuration of the downlink signal and / or a transmission configuration of the uplink signal of the backhaul link based on the set of candidate beams.

Description

Technical Field

[0001] (Cross-reference to Related Applications) This application claims the priority of a Chinese patent application with an application number of 202210879050.6 and a title of "Method, Apparatus, Relay Device, and Network-Side Device for Determining Transmission Configuration of Backhaul Link", which was filed with the Chinese Patent Office on July 25, 2022, and all of its contents are incorporated herein by reference.

[0002] This application belongs to the field of communication technology, and specifically relates to a method, apparatus, relay device, and network-side device for determining the transmission configuration of a backhaul link.

Background Art

[0003] Signal amplifiers are widely used to expand the coverage of cells. For example, a Network Controlled Repeater (NCR) can, as a relay node, transfer signals from a base station or a User Equipment (UE, also called a terminal device) and amplify the signals to achieve the purpose of expanding the coverage. [[ID=二十]]

[0004] Here, the NCR has the ability of beamforming and can receive control from an upstream base station (i.e., a donor base station). That is, the base station can control the transmission parameters of the NCR. For example, the base station can control the receive / transmit beams between the NCR and the base station or between the NCR and the UE.

[0005] For example, the network structure shown in Figure 2 includes three network nodes, and the intermediate network node is a type of NCR device, which includes one terminal module (mobile termination, MT) and one forwarding unit (Fwd). Here, the MT can establish a connection with the upstream base station (i.e., a control link), and the base station can transmit control signaling to the NCR via the MT, and control the transmit / receive related parameters (including parameters such as power, amplification factor, beam, and on / off) of the backhaul link (BH) between the NCR and the base station or the access link (AL) between the NCR and the UE.

[0006] The link between the NCR and the base station requires the NCR to determine the downlink signal receiving beam and the uplink signal transmitting beam. For control link downlink signals (including PDCCH, PDSCH, SSB, etc.) transmitted from the base station to the NCR, the NCR can determine the corresponding control link downlink signal receiving beam according to the rules for how terminals receive downlink signals. However, for backhaul link downlink signals transmitted from the base station to the NCR and amplified and forwarded by the NCR, there is no corresponding determination method for the corresponding receiving beam. Similarly, for backhaul link uplink signals transmitted from the terminal to the NCR and amplified and forwarded to the base station, there is no corresponding determination method for the NCR's uplink signal transmitting beam.

[0007] As can be seen from the above, the current solution does not provide a method for determining the receiving beam for downlink signals and the transmitting beam for uplink signals in the NCR backhaul link. [Overview of the project] [Problems that the invention aims to solve]

[0008] Embodiments of this application provide a method, apparatus, relay equipment, and network-side equipment for determining the transmission configuration of a backhaul link, and a method for determining the receiving beam of a downlink signal and / or the transmitting beam of an uplink signal in an NCR backhaul link. [Means for solving the problem]

[0009] According to the first aspect, a method for determining the transmission configuration of a backhaul link is provided, and this determination method is: The relay equipment acquires a configurable candidate beamset for the control link, The relay equipment includes determining the transmission configuration instruction TCI configuration and / or transmission configuration for the uplink signal of the backhaul link based on the candidate beamset.

[0010] According to a second aspect, a method for determining the transmission configuration of a backhaul link is provided, and this determination method is: The network-side equipment determines the configurable candidate beamsets for the control link, The network-side equipment transmits beam configuration signaling for the backhaul link to the relay equipment, wherein the beam configuration signaling is used to instruct the relay equipment to determine the transmission configuration instruction (TCI) configuration for the downlink signal and / or the transmission configuration for the uplink signal of the backhaul link based on a configurable candidate beamset for the control link. The network-side equipment includes determining the transmit beam and / or receive beam for the backhaul link's downlink signal based on the beam configuration signaling or protocol specification.

[0011] According to a third aspect, a transmission configuration determination device for a backhaul link is provided, and this determination device is A candidate beamset acquisition module for obtaining a configurable candidate beamset for the control link, The system includes a first configuration determination module for determining the transmission configuration instruction TCI configuration and / or transmission configuration for the backhaul link's downlink signal based on the candidate beamset.

[0012] According to a fourth aspect, a device for determining the transmission configuration of a backhaul link is provided, and this device is A candidate beamset determination module for determining configurable candidate beamsets for the control link, A first transmitting module used to transmit beam configuration signaling for a backhaul link to a relay device, wherein the beam configuration signaling instructs the relay device to determine a transmission configuration instruction TCI configuration and / or transmission configuration for uplink signals of the backhaul link based on a configurable candidate beamset of the control link. The system includes a second configuration determination module for determining the transmit beam and / or receive beam for the uplink signal of the backhaul link based on the candidate beamset, based on the beam configuration signaling or protocol specification.

[0013] According to the fifth aspect, a relay device is provided which includes a processor and memory, the memory storing a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the steps of the method of the first aspect are realized.

[0014] According to the sixth aspect, a network-side device is provided, which includes a processor and memory, the memory storing a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method according to the second aspect are realized.

[0015] According to the seventh aspect, a transmission configuration determination system for a backhaul link is provided, comprising a relay device and a network-side device, wherein the relay device may be used to perform the steps of the backhaul link transmission configuration determination method described in the first aspect, and the network-side device may be used to perform the steps of the backhaul link transmission configuration determination method described in the second aspect.

[0016] According to the eighth aspect, a readable storage medium is provided, the readable storage medium storing a program or instruction, and when the program or instruction is executed by a processor, a step of the method according to the first aspect is realized, or a step of the method according to the second aspect is realized.

[0017] According to the ninth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled with the processor, the processor running a program or instructions, and being used to implement the method according to the first aspect or the method according to the second aspect.

[0018] According to the tenth aspect, a computer program / program product is provided, the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to realize the steps of the method according to the first or second aspect.

[0019] According to the eleventh aspect, an embodiment of the present application provides a backhaul link transmission configuration determination device, which is used to perform steps of a backhaul link transmission configuration determination method described in the first or second aspect. [Effects of the Invention]

[0020] In the embodiments of the present application, the relay device can obtain a set of candidate beams that can form a control link, and thereby determine the TCI configuration of the downlink signal and / or the transmission configuration of the uplink signal of the backhaul link based on this set of candidate beams. That is, in the embodiments of the present application, the reception beam of the downlink signal and / or the transmission beam of the uplink signal of the backhaul link can be selected from the set of candidate beams of the control link. Therefore, the embodiments of the present application provide a method for determining the reception beam of the downlink signal and / or the transmission beam of the uplink signal in the backhaul link of the NCR.

Brief Description of Drawings

[0021] [Figure 1] It is a block diagram of a wireless communication system to which the embodiments of the present application are applicable. [Figure 2] It is a schematic diagram of the transmission link between the base station, NCR and UE in the embodiments of the present application. [Figure 3] It is a flowchart of a method for determining the transmission configuration of one backhaul link in the embodiments of the present application. [Figure 4] It is a flowchart of a method for determining the transmission configuration of another backhaul link in the embodiments of the present application. [Figure 5] It is a structural block diagram of a device for determining the transmission configuration of one backhaul link in the embodiments of the present application. [Figure 6] It is a structural block diagram of a device for determining the transmission configuration of another backhaul link in the embodiments of the present application. [Figure 7] It is a structural block diagram of one communication device in the embodiments of the present application. [Figure 8] It is a structural block diagram of one network-side device in the embodiments of the present application.

Embodiment

[0022] The following clearly and completely describes the technical concepts in the embodiments of this application, linking them to the drawings of the embodiments. Clearly, the embodiments described are only some, and not all, embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are all within the scope of protection of this application.

[0023] The terms "first," "second," etc., used in the specification and claims of this application are intended to distinguish similar subjects and not to describe a specific order or sequence. It should be understood that these terms are interchangeable where appropriate, so that the embodiments of this application may be carried out in an order other than those illustrated or described herein, and that the subjects distinguished by "first" and "second" are generally of the same kind and do not limit the number of subjects; for example, the first subject may be one or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected subjects, and the letter " / " generally indicates that the preceding and succeeding related subjects are in an "or" relationship.

[0024] It should be noted that the technologies described in the embodiments of this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but are also applicable to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of this application are always used interchangeably, and the technologies described may be used for the systems and radio technologies mentioned above, or for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and uses NR terminology in most of the following descriptions, but these technologies are also applicable to applications other than NR system applications, such as sixth-generation (6) radio. th It may be applied to 6G (Generation 1) communication systems.

[0025] Figure 1 shows a block diagram of a wireless communication system to which an embodiment of this application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. Here, terminal 11 may be a terminal-side device such as a mobile phone, tablet personal computer, laptop computer (or notebook computer), personal digital assistant (PDA), palmtop computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) equipment, robot, wearable device, in-vehicle equipment (VUE), pedestrian terminal (PUE), smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), deposit machine, or self-service machine, and wearable devices include smartwatches, smart bands, smart earphones, smart glasses, smart accessories (smart bracelets, smart rings, smart necklaces, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiments of this application do not limit the specific type of terminal 11. The network-side equipment 12 may include access network equipment or core network equipment, where access network equipment may also be called radio access network equipment, radio access network (RAN), radio access network function, or radio access network unit.Access network equipment may include base stations, WLAN access points, or WiFi nodes, and base stations may also be called node B, evolutionary node B (eNB), access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), home B node, home evolutionary B node, transmitting and receiving point (TRP), or any other appropriate term in the art, and are not limited to specific technical terms as long as the same technical effect is achieved. For the purposes of this explanation, only base stations in NR systems are given as examples in the embodiments of this application, but this does not limit the specific types of base stations.

[0026] To facilitate understanding of the method for determining the transmission configuration of the backhaul link in the embodiment of this application, the relevant technologies are described below.

[0027] According to the first aspect, the invention relates to beam control of an access link.

[0028] Currently, base stations can control the beam of an NCR control link, for example, by indicating the beam number or associated reference signal (RS) number for receiving or transmitting the control link through beam indication information, and the NCR adjusts the beam of the control link based on the base station indication.

[0029] According to the second aspect, the method for indicating the uplink / downlink beam of a terminal in Rel-15 is as follows: For a downlink beam, the terminal needs to receive broadcast signals, such as the Synchronization Signal Block (SSB), Channel State Information-Reference Signal (CSI-RS), cell-specific Physical Downlink Control Channel (cell-specific PDCCH), cell-specific Physical Downlink Shared Channel (cell-specific PDSCH), UE-specific Physical Downlink Control Channel (UE-specific PDCCH), and UE-specific Physical Downlink Shared Channel (UE-specific PDSCH). Each downlink signal and downlink physical channel needs to determine the corresponding downlink beam.

[0030] Here, the terminal's downlink beam determination method includes implicitly determining the downlink beam from the SSB set based on predefined rules, and explicitly determining the downlink beam based on Downlink Control Information (DCI), Media Access Control Element (MAC CE), or Radio Resource Control (RRC) signaling.

[0031] Specifically, network-side equipment may configure a set of candidate Transmission Configuration Indicators (TCIs) by RRC signaling (e.g., physical downlink shared channel configuration (PDSCH-config)), which includes M sets of TCI configuration information, where the value of M is determined by the terminal capability, and up to eight TCI configurations are selected from the M sets of TCI configuration information by MAC CE activation signaling (activation command) and mapped to the DCI field "Transmission Configuration Indication". The terminal determines the corresponding PDSCH TCI configuration by reading the DCI field "Transmission Configuration Indication".

[0032] For PDCCH, network-side devices can configure corresponding TCIs for each type of control resource set (CORESET). Furthermore, if the system has not yet configured the TCI or activation signaling (i.e., MAC CE activation command) has not been received, the terminal defaults to using the SSB used in the most recent random access process as the PDCCH's quasi-co-location (QCL) reference beam. And, after the terminal receives the MAC CE activation command, the terminal slots...

number

number

[0033] For a PDSCH, network-side equipment can configure a single TCI candidate set for the terminal and dynamically instruct the PDSCH's TCI configuration information via DCI. If no TCI configuration set is configured or not yet activated, the terminal uses the SSB used in the random access process as the pseudo-collocation reference beam. Here, the PDSCH's TCI instructed by DCI must be activated after the terminal receives the DCI (after the pseudo-collocation time length (timeDurationForQCL) slot), and if the scheduled PDSCH time offset is shorter than the timeDurationForQCL slot, the terminal receives the PDSCH according to the most recent COREST pseudo-collocation configuration. Here, the value of timeDurationForQCL may be predefined; for example, if the subcarrier spacing (SCS) is 60 kHz, the selectable values ​​are 7, 14, and 28, and if the SCS is 120 kHz, the selectable values ​​are 14 and 28.

[0034] For uplink beams, the terminal determines the signal based on the Sounding Reference Signal resource indicator (SRI) for channel sounding or the downlink beam. For example, for a Physical Uplink Control Channel (PUCCH), network-side equipment configures the PUCCH's uplink beam using the Physical Uplink Control Channel SpatialRelationInfo (PUCCH-SpatialRelationInfo) parameter, which can indicate, for example, one SSB or Channel State Information-Reference Signal (CSI-RS). The PUCCH's transmit beam (spatial domain filter) corresponds to the SSB or CSI-RS's receive beam, or indicates one SRS, and the PUCCH and SRS transmit beams are the same. The transmit beam of a Physical Uplink Shared Channel (PUSCH) must be the same as the PUCCH, and if there is no PUCCH to reference, the beam of the CORESET with the smallest number is used as the reference.

[0035] According to a third aspect, a method for indicating the uplink / downlink beam of a terminal in Rel-17: The beam indicating mechanism includes TCI configuration, TCI state activation, and TCI indicating.

[0036] For TCI configuration and TCI state activation, the TCI configurations for the uplink and downlink may be configured uniformly or separately. For TCI states configured uniformly for the uplink and downlink, eight of these TCI states can be activated by MAC CE, and for TCI states configured separately for the uplink and downlink, gNB can activate eight pairs of these TCI states via MAC CE.

[0037] For Rel-17 terminals, 5G base stations (NR Node B, gNB) transmit beam indication information (i.e., TCI indication information) to uniformly indicate the uplink and downlink beams. The information indicated in the beam indication information is one or a pair of TCI states activated by MAC CE. The start time of activation of the TCI indication information is x time units after the ACK feedback corresponding to the TCI indication information, and the end time of activation of the TCI indication information is the start time of activation of the next TCI indication information.

[0038] As can be seen from the above description, 1. Downlink channels may be configured as different beams; for example, PDCCH and PDSCH may be configured as different TCIs, and the coresets of different PDCCHs may be configured as different beams.

[0039] 2. The beam of the downlink channel may be dynamically configured by signaling. 3. The beam of the uplink channel may be determined based on the beam of the downlink channel or it may be individually configured (SRI).

[0040] In the following sections, the method for determining the transmission configuration of a backhaul link according to the embodiments of this application will be described in detail with reference to several embodiments and their application scenarios, while linking them to the drawings.

[0041] According to a first embodiment, referring to Figure 3, an embodiment of the present application provides a method for determining the transmission configuration of a backhaul link, the method may include the following steps.

[0042] Step 301: The relay equipment acquires a configurable candidate beamset for the control link.

[0043] Selectively, the candidate beamsets are A beam corresponding to the candidate TCI configuration information of the control link, A beam corresponding to the downlink reference signal of the control link, The beam corresponding to the downlink physical channel of the control link, A beam corresponding to the uplink reference signal of the control link, It includes at least one of the following: the uplink physical channel of the control link and the beam corresponding to that channel.

[0044] Here, the candidate TCI configuration described above is an available but not activated TCI configuration, the downlink reference signal of the control link described above may include SSB and / or CSI-RS, the downlink physical channel of the control link described above may include PDCCH and / or PDSCH, the uplink reference signal of the control link described above may include SRS and / or PRACH, and the uplink physical channel of the control link described above may include PUCCH and / or PUSCH.

[0045] Step 302: Based on the candidate beamset, the relay equipment determines the transmission configuration instruction TCI configuration for the downlink signal and / or the transmission configuration for the uplink signal of the backhaul link.

[0046] Here, determining the TCI configuration for the downlink signal of the backhaul link is equivalent to determining the receiving beam for the downlink signal at the backhaul link of the relay equipment, and determining the transmission configuration for the uplink signal of the backhaul link is equivalent to determining the transmitting beam for the uplink signal at the backhaul link of the relay equipment.

[0047] Furthermore, NCR backhaul links have different transmission requirements than PDSCH. For example, a dynamically scheduled PDSCH determines the transmission time and beam (i.e., TCI configuration) by downlink control signaling DCI. An NCR backhaul link is a type of relay link, and it needs to carry multiple types of downlink channels such as PDSCH, PDCCH, and SSB for terminals and be on for extended periods, and the beam needs to remain unchanged for extended periods. Similarly, a backhaul link needs to carry multiple types of uplink channels such as PUCCH, PUSCH, and SRS from multiple terminals and occupy multiple uplink slots, and therefore the uplink of the backhaul link also needs to be on for extended periods. Consequently, NCRs tend to use the same long-duration receive beam or transmit beam as the beam configuration for the backhaul link. Conventional dynamic beam indication methods (i.e., dynamic beam indication used for PDSCH or PUSCH) are unsuitable for NCR backhaul links that are on for extended periods. To make it clear, the TCI configuration for the downlink signal and the transmit configuration for the uplink signal of a backhaul link may be valid for an extended period, the validity period being defined by the protocol, explicitly indicated by the network, or remaining valid until a new TCI configuration for the downlink signal and a transmit configuration for the uplink signal become valid.

[0048] In the embodiments of this application, a relay device can acquire a configurable candidate beamset for the control link, thereby determining the TCI configuration for the downlink signal and / or the transmission configuration for the uplink signal of the backhaul link based on this candidate beamset. That is, in the embodiments of this application, the receiving beam for the downlink signal and / or the transmitting beam for the uplink signal of the backhaul link can be selected from the candidate beamset for the control link. Accordingly, embodiments of this application provide a method for determining the receiving beam for the downlink signal and / or the transmitting beam for the uplink signal in a backhaul link of an NCR.

[0049] Selectively, the TCI configuration of the downlink signal of the backhaul link is: The reference signal of the control link, It includes at least one of the following: pseudo-collocation QCL types.

[0050] Here, the reference signal for the control link may be either SSB or CSI-RS.

[0051] Furthermore, different QCL types correspond to different QCL parameters, or different QCL types indicate different QCL parameters, and therefore, the QCL types included in the TCI configuration of the downlink signal can indicate different QCL parameters. Here, the QCL parameters are: Spatial receiver parameters (Spatial Rx parameters) and Doppler shift and, Doppler diffusion and Average delay and, Delay spread and It includes at least one of the following: average gain.

[0052] Selectively, the relay equipment determines the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset. The relay equipment determines the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, in accordance with the protocol specifications. Or, The relay device receives the first configuration signaling transmitted by the network-side device. The relay equipment includes determining the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, based on the first configuration signaling.

[0053] Here, since the protocol specification or the first configuration signaling contains relevant information regarding the TCI configuration of the backhaul link's downlink signal, the relay equipment can determine the TCI configuration of the backhaul link's downlink signal based on the protocol specification or the first configuration signaling, and based on the candidate beamset of the control link.

[0054] As can be seen below, in the embodiments of this application, the relay equipment may determine the receiving beam of the downlink signal of the backhaul link using the following method 1 or method 2.

[0055] Method 1: Based on the protocol specifications, the receiving beam for the downlink signal of the backhaul link is determined based on the candidate beamset of the control link. Method 2: Based on the received first configuration signaling, the receiving beam for the downlink signal of the backhaul link is determined based on the candidate beamset of the control link.

[0056] To make it easier to understand, the above methods 1 and 2 may be combined into a single solution. For example, if the network-side equipment has not configured the TCI of the downlink signal using dedicated signaling (i.e., the first configuration signaling), or before the TCI configuration configured by the dedicated signaling begins to take effect or after the activation time has ended, the relay equipment may determine the received beam of the downlink signal (i.e., method 1) in accordance with the prior provisions of the protocol, and after receiving the dedicated signaling (i.e., the first configuration signaling), determine the received beam of the downlink signal based on the dedicated signaling.

[0057] Here, the first configuration signaling described above may be MAC CE, RRC, or DCI.

[0058] For example, network-side equipment may transmit MAC CE (e.g., TCI activation signaling) or RRC signaling aperiodicly or periodically to instruct the TCI configuration of the backhaul link downlink signals. Alternatively, for example, DCI signaling may be transmitted on a dedicated CORESET or in a dedicated format to indicate the TCI configuration of the backhaul link's downlink signal. Specifically, for example, the DCI field "Transmission Configuration Indication" or reserved fields in DCI may be multiplexed (i.e., the DCI field "Transmission Configuration Indication" or reserved fields in DCI may carry relevant information regarding the TCI configuration of the backhaul link's downlink signal), or the a (e.g., a=1) bit field in DCI may be used to indicate whether "Transmission Configuration Indication" is used for the control link or the backhaul link.

[0059] Furthermore, network-side equipment may configure a time period for turning on the backhaul link for relay equipment and simultaneously configure the TCI configuration for the downlink signal. That is, the first configuration signaling described above may be a signaling for configuring a time period for turning on the backhaul link. Selectively, if the relay equipment determines the TCI configuration for the downlink signal of the backhaul link based on the candidate beamset, based on the first configuration signaling, the TCI configuration for the downlink signal of the backhaul link is activated from the time indicated by k+X. Here, k indicates the slot or last symbol in which the first configuration signaling resides, or the slot or last symbol in which the hybrid auto-retransmission request-acknowledgment feedback message corresponding to the first configuration signaling resides, and X is determined by the protocol specification or based on the capabilities of the relay equipment. That is, the delay request must be satisfied from the time the relay equipment receives the dedicated signaling (i.e., the first configuration signaling) until the TCI configuration of the downlink signals to the relay equipment's backhaul link is activated.

[0060] Here, X is

number

number

[0061] Selectively, the first configuration signaling can explicitly indicate the activation time of the TCI configuration of the downlink signal, including the activation start time and / or the length of the activation time.

[0062] As can be seen from the above, the first configuration signaling may also carry an effective time period or effective time period of the TCI configuration of the downlink signal. The effective time period or effective time period may include the ON or operating time period of the backhaul link. For example, if the first configuration signaling indicates the ON or operating time period of the backhaul link of the relay equipment and the corresponding TCI configuration of the downlink signal and the transmission configuration of the uplink signal, the relay equipment will perform downlink signal reception and uplink signal transmission of the backhaul link using the corresponding TCI configuration and uplink signal transmission configuration during the operating time period configured by the dedicated signaling.

[0063] To make it clear, after receiving the new downlink signal TCI configuration and before the new downlink signal TCI configuration becomes active, the backhaul link of the relay equipment can operate according to the protocol specifications. For example, it can perform signal transmission using the conventional downlink signal TCI configuration, or refrain from signal transmission before the new downlink signal TCI configuration becomes active.

[0064] The selective determination of the TCI configuration of the backhaul link's downlink signal by the relay equipment based on candidate beamsets can be divided into cases A-1 to A-4 described below.

[0065] Case A-1: ​​If the protocol specification or the first configuration signaling indicates that the downlink reference signal and / or downlink physical channel of the control link has a QCL relationship with the backhaul link, the TCI configuration of the downlink signal of the backhaul link is determined based on the downlink reference signal and / or downlink physical channel of the control link.

[0066] The situation in Case A-1 is described in detail below.

[0067] A-1.1, selectively, if the protocol specification or the first configuration signaling indicates that a QCL relationship exists between the downlink reference signal of the control link and the backhaul link, the reference signal included in the TCI configuration of the downlink signal of the backhaul link is the downlink reference signal of the control link, and the QCL type is determined based on the protocol specification or the configuration of the network-side equipment.

[0068] In other words, the statement above that "the TCI configuration of the downlink signal of the backhaul link is determined based on the downlink reference signal of the control link" means that the specific determination method may be as follows.

[0069] The reference signal included in the TCI configuration of the downlink signal of the backhaul link is the downlink reference signal of the control link, and the QCL type is determined based on the protocol specification or based on the configuration of the network-side equipment. For example, the reference signal included in the TCI configuration of the downlink signal of the backhaul link is selected from the SSB selected when the control link performs random access according to the protocol specification. Alternatively, for example, the reference signal included in the TCI configuration of the downlink signal of the backhaul link is selected from the CSI-RS of the control link according to the configuration of the network-side equipment. Alternatively, for example, the reference signal included in the TCI configuration of the downlink signal of the backhaul link is specified as the most recently transmitted downlink reference signal of the control link according to the protocol.

[0070] Selectively, the pseudo-collocation parameters (i.e., parameters corresponding to the QCL type) may include at least one of the parameters defined in Spatial Rx parameter (i.e., QCL type D), average gain, and QCL Type A, B, and C. For example, the protocol specification may configure the QCL type to QCL Type D by default, or it may configure the pseudo-collocation parameters to QCL Type D and average gain by default. The explicit configuration of the network may be some of the pseudo-collocation parameters here.

[0071] Here, the downlink reference signal may be an SSB or a CSI-RS. For example, if the protocol specification specifies that an SSB or CSI-RS selected by the control link (e.g., a CSI-RS for tracking) has a QCL relationship with the backhaul link (i.e., the SSB or CSI-RS selected by the control link is the QCL-related signal of the backhaul link), then the reference signal in the TCI configuration of the downlink signal of the backhaul link is an SSB or a CSI-RS, and the QCL type in the TCI configuration of the downlink signal is specified by the protocol or configured by the network-side equipment (i.e., the downlink beam of the backhaul link and the SSB or CSI-RS satisfy the QCL type specified by the protocol or configured by the network-side equipment). Here, this SSB may be an SSB selected in the random access process of the relay equipment.

[0072] The following describes two different cases where the downlink reference signals used to establish the backhaul link and QCL relationship are SSB and CSI-RS, respectively.

[0073] (1) If the protocol specification or the first configuration signaling indicates that QCL associations exist for the SSBs of the backhaul link and the control link, the backhaul link of the relay equipment selects the SSB used in the most recent random access process of the control link as the reference signal for QCL, and the specific implementation details are illustrated below.

[0074] Selectively, from the perspective of the relay equipment, in terms of the time-frequency resources of SSB transmission, the receive beam of the downlink signal on the backhaul link and the receive beam of the SSB on the control link satisfy the QCL type defined by the protocol or configured by the network side (i.e., the receive beam of the downlink signal on the backhaul link is the same as the receive beam of the SSB on the control link), and from the perspective of the network equipment, in terms of the time-frequency resources transmitted by SSB, the transmit beam of the downlink signal on the backhaul link coincides with the transmit beam of the SSB on the control link.

[0075] Selectively, if a QCL relationship exists between the control link SSB and the backhaul link downlink signal, and the SSB identification information (e.g., SSB number) is carried in the second configuration signaling transmitted by the network-side equipment, the reference signal included in the TCI configuration of the backhaul link downlink signal is the SSB corresponding to the SSB identification information carried in the second configuration signaling. Here, the second configuration signaling may be MAC CE, RRC, or DCI. Furthermore, this second configuration signaling may be the same as or different from the first configuration signaling.

[0076] Here, the SSB identified by the SSB identification information carried to the second configuration signaling may differ from the SSB in the process of random access by the relay equipment.

[0077] (2) If the protocol specification or the first configuration signaling indicates that QCL associations exist in the CSI-RS of the backhaul link and the control link, the backhaul link of the relay equipment shall select CSI-RS as the reference signal for QCL, and the specific implementation details are exemplified below.

[0078] Selectively, from the perspective of the relay equipment, in terms of the time-frequency resources of CSI-RS transmission, the receive beam of the downlink signal on the backhaul link and the CSI-RS receive beam on the control link satisfy the QCL type defined by the protocol or configured on the network side (i.e., the receive beam of the downlink signal on the backhaul link is the same as the CSI-RS receive beam on the control link), and from the perspective of the network equipment, in terms of the time-frequency resources transmitted by CSI-RS, the transmit beam of the downlink signal on the backhaul link coincides with the CSI-RS transmit beam on the control link.

[0079] A-1.2, selectively, if the protocol specification or the first configuration signaling indicates that a QCL relationship exists between the downlink physical channel of the control link and the backhaul link, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration of the downlink physical channel of the control link.

[0080] In other words, the statement above that "the TCI configuration of the backhaul link's downlink signal is determined based on the downlink physical channel of the control link" means that the specific determination method may be that the TCI configuration of the backhaul link's downlink signal is the same as or partially the same as the TCI configuration of the control link's downlink physical channel. Furthermore, for example, according to the protocol specification, the TCI configuration of the backhaul link's downlink signal is the same as or partially the same as the TCI configuration of the nearest downlink physical channel of the control link.

[0081] Selectively, being partially the same as described above means that the reference signals included in the TCI configuration are the same, and the QCL type is indicated by the protocol specification or by the configuration message.

[0082] That is, the protocol may instruct that a QCL relationship exists between the downlink physical channel of the control link and the backhaul link, or the first configuration signaling may instruct that a QCL relationship exists between the downlink physical channel of the control link and the backhaul link. In such cases, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration of the downlink physical channel of the control link. For example, the reference signals in both are the same, but the QCL types are different, in which case the QCL type may be instructed independently by the network-side equipment or defined by the protocol.

[0083] Selectively, if a QCL relationship exists between the downlink physical channel of the control link and the backhaul link, the TCI configuration of the downlink signal is the same or partially the same as the TCI configuration corresponding to the spatial receiver parameters in the TCI configuration of the downlink physical channel.

[0084] That is, the downlink physical channel in which the backhaul link and QCL association exist includes two TCI configurations, but in the embodiments of this application, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration corresponding to the spatial receiver parameter (Spatial Rx parameter) (i.e., QCL Type D) in these two TCI configurations.

[0085] Here, the downlink physical channel may be either a PDCCH or a PDSCH. The following describes different cases where the downlink physical channels establishing the backhaul link and QCL relationship are PDCCH and PDSCH, respectively.

[0086] (1) If the protocol specification or the first configuration signaling indicates that QCL associations exist for the PDCCHs of the backhaul link and the control link, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration of a particular search space or a particular control resource set (CORESET) of the PDCCH. Here, the method for determining a particular CORESET may be predefined by the protocol (e.g., specifying that the CORESET corresponding to a Type 0 PDCCH is a particular CORESET, or that the CORESET with the smallest CORESET number is a particular CORESET), or it may be configured by the network side (i.e., CORESET identification information (e.g., a CORESET code) may be carried in the signaling transmitted by the network-side equipment, and the CORESET indicated by this identification information is a particular CORESET). Similarly, the method for determining a particular search space is similar to the method for determining a particular CORESET and will not be described further here.

[0087] The specific details of how such cases can be implemented are illustrated below.

[0088] Selectively, from the perspective of the relay equipment, in the time-frequency resource where a specific search space or specific coreset of the PDCCH is located, the TCI configuration of the backhaul link's downlink signal is the same as or partially the same as the TCI configuration of the PDCCH in that specific SS or specific coreset; and from the perspective of the network equipment, in the time-frequency resource where a specific search space or specific coreset of the PDCCH is located, the downlink signal transmit beam of the backhaul link coincides with the beam of the PDCCH in that specific SS or specific coreset.

[0089] Selectively, from the perspective of the relay equipment, within v1 time units after a specific search space or coreset of the PDCCH, the TCI configuration of the backhaul link downlink signal is the same as or partially the same as the TCI configuration of the PDCCH in this specific SS or coreset; and from the perspective of the network equipment, within v1 time units after a specific search space or coreset of the PDCCH, the backhaul link downlink signal transmit beam matches the beam of the PDCCH in this specific search space or coreset. Here, the value of v1 is defined by the protocol or explicitly configured by the network, or remains valid until a new TCI configuration is configured in this specific search space or coreset, or remains valid until the next control link PDCCH transmission. This time unit can be, for example, a slot, a symbol, or a millisecond (ms).

[0090] (2) If the protocol specification or the first configuration signaling indicates that QCL associations exist for the PDSCH of the backhaul link and the control link, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration corresponding to the PDSCH.

[0091] If the control link selectively schedules dynamic and semi-static PDSCHs, the backhaul link downlink signal may preferentially select the TCI configuration corresponding to the semi-static PDSCH (i.e., the TCI configuration of the backhaul link downlink signal is the same or partially the same as the TCI corresponding to the semi-static PDSCH). That is, the control link includes PDSCHs for dynamic scheduling and semi-static scheduling (SPS). Considering that the backhaul link needs to be on for an extended period, the TCI configuration of the backhaul link downlink signal may therefore be the same or partially the same as the TCI configuration corresponding to the control link's semi-static scheduling PDSCH.

[0092] The specific details of how such cases can be implemented are illustrated below.

[0093] Selectively, from the perspective of the relay equipment, within v2 time units after PDSCH transmission, the TCI configuration of the backhaul link downlink signal is the same as or partially the same as the TCI configuration of the control link PDSCH, and from the perspective of the network equipment, within v2 time units after PDSCH transmission, the transmit beam of the backhaul link downlink signal matches the beam of the control link PDSCH. Selectively, the value of v2 is always valid until specified by the protocol or explicitly configured by the network side or a new TCI configuration is configured for the PDSCH, or until the next control link PDSCH transmission.

[0094] Selectively, for a semi-static scheduling PDSCH, from the perspective of the relay equipment, the TCI configuration of the backhaul link downlink signal is the same as or partially the same as the TCI configuration of the control link's semi-static scheduling PDSCH, starting from v3 time units after the PDSCH's SPS activation signaling is transmitted. From the perspective of the network equipment, the transmit beam of the backhaul link downlink signal is the same as the beam of the control link's semi-static scheduling PDSCH, starting from v3 time units after the PDSCH's SPS activation signaling is transmitted. The v3 time units are greater than or equal to the pseudo-collocation time length (timeDurationForQCL).

[0095] Selectively, from the perspective of the relay equipment, the TCI configuration of the backhaul link downlink signal is the same as or partially the same as the TCI configuration of the control link semi-static scheduling PDSCH from v4 time units after the transmission of the feedback signaling corresponding to the PDSCH SPS activation signaling. From the perspective of the network equipment, the transmit beam of the backhaul link downlink signal is the same as the beam of the control link semi-static scheduling PDSCH from v4 time units after the transmission of the feedback signaling corresponding to the PDSCH SPS activation signaling. The v4 time units are greater than or equal to the pseudo-collocation time length (timeDurationForQCL).

[0096] Selectively, from the perspective of the relay equipment, the TCI configuration of the downlink signal of the backhaul link from the first PDSCH resource of the SPS is the same as or partially the same as the TCI configuration of the semi-static scheduling PDSCH of the control link, and from the perspective of the network equipment, the transmit beam of the downlink signal of the backhaul link from the first PDSCH resource of the SPS coincides with the beam of the semi-static scheduling PDSCH of the control link.

[0097] Selectively, from the perspective of the relay equipment, within v5 time units after the PDSCH transmission of the semi-static scheduling of the control link, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration of the PDSCH of the semi-static scheduling of the control link; and from the perspective of the network equipment, within v5 time units after the PDSCH transmission of the semi-static scheduling of the control link, the transmit beam of the downlink signal of the backhaul link coincides with the beam of the PDSCH of the semi-static scheduling of the control link. Here, this time unit is, for example, a slot, symbol, or millisecond.

[0098] Selectively, from the perspective of the relay equipment, within v6 time units after the last valid PDSCH of the SPS, the TCI configuration of the backhaul link downlink signal is the same as or partially the same as the TCI configuration of the control link semi-static scheduling PDSCH, and from the perspective of the network equipment, within v6 time units after the last valid PDSCH of the SPS, the transmit beam of the backhaul link downlink signal coincides with the beam of the control link semi-static scheduling PDSCH.

[0099] Selectively, from the perspective of the relay equipment, within v7 time units after the relay equipment receives the SPS deactivation signaling, the TCI configuration of the backhaul link downlink signaling is the same as or partially the same as the TCI configuration of the control link's semi-static scheduling PDSCH, and from the perspective of the network-side equipment, within v7 time units after the relay equipment receives the SPS deactivation signaling, the transmit beam of the backhaul link downlink signaling coincides with the beam of the control link's semi-static scheduling PDSCH.

[0100] It should be noted that the TCI configuration of a semi-static PDSCH remains in effect until the control link receives a new TCI activation signaling / configuration signaling and re-instructs the TCI configuration for this semi-static PDSCH, or until the TCI instruction information of the new semi-static PDSCH activation signaling / configuration signaling begins to take effect.

[0101] That is, after the activation time for the current backhaul link TCI configuration has ended, the relay equipment's backhaul link will re-determine the TCI configuration of the backhaul link's downlink signal based on the candidate beamset, in accordance with the protocol specification or the instructions of the first configuration signaling. For example, after a semi-static PDSCH is deactivated, the TCI configuration of a dynamic scheduling PDSCH or PDCCH or control link will determine the TCI configuration of the backhaul link's downlink signal using the SSB selected in the most recent random access process.

[0102] Furthermore, it should be explained that during periods when the PDCCH / PDSCH / CSI-RS beam is not activated (for example, in a certain scenario, no beam is configured for PDCCH / PDSCH / CSI-RS, or a beam is configured but not activated), the receiving beam for the downlink signal of the relay equipment's backhaul link may, by default, use the SSB beam, or use the beam indicated by dedicated signaling.

[0103] Case A-2: If the first configuration signaling includes target identification information, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration indicated by the target identification information, and the target identification information indicates one TCI configuration from a candidate set of TCI configurations for the control link.

[0104] Selectively, the TCI configuration indicated by the target identification information is one of the M candidate TCI configurations indicated in the upper layer configuration information, or one of the N TCI configurations indicated in the TCI activation command of the control link, where M and N are both integers greater than 0. Here, the N TCI configurations are a part of the M TCI configurations.

[0105] In other words, the TCI configuration of the downlink signal of the backhaul link of the relay equipment may be selected from M candidate TCI configurations provided in the higher layer configuration information (e.g., PDSCH-Config), or it may be selected from N TCI configurations in the MAC CE TCI activation command of the control link.

[0106] For example, a base station may first configure M candidate TCI configurations for the NCR control link using RRC signaling, and then select N configurations from these M candidate TCI configurations for the relay equipment control link using MAC CE signaling, thereby selecting one from the M candidate TCI configurations or one from the N candidate TCI configurations, and then carrying this selected TCI configuration by DCI.

[0107] To make it easier to understand, the M candidate TCI configurations in the upper layer configuration information (PDSCH-Config) or the N candidate TCI configurations in the TCI activation command are configured based on the SSB or CSI-RS on the control link of the relay equipment. Therefore, the downlink reference signal on the control link of the relay equipment is essentially treated as an exception to the QCL related signals on the backhaul link (i.e., an exception to Case 1 above).

[0108] Case A-3: If the first configuration signaling includes a TCI configuration, the TCI configuration of the downlink signal of the backhaul link is the TCI configuration in the first configuration signaling.

[0109] In other words, specific parameters of the TCI configuration of the backhaul link of the relay equipment may be directly indicated by dedicated signaling (i.e., the first configuration signaling described above). For example, the first configuration signaling may indicate the CSI-RS or SSB instruction information (e.g., ID number) and QCL type for the control link.

[0110] Here, if the QCL type is specified in the protocol specification (i.e., it is the default), specifying the QCL type in the first configuration signaling may be omitted.

[0111] Selectively, and to explain, if a relay device does not receive a new QCL configuration (i.e., the downlink reference signals of the relay device's backhaul link and the control link where the QCL association exists do not change, and the QCL types associated with both do not change), or if the TCI configuration of the reference channel (i.e., the downlink physical channel of the relay device's backhaul link and the control link where the QCL association exists) does not change, the relay device maintains the existing QCL association and TCI configuration.

[0112] Case A-4: Selectively, the TCI configuration of the backhaul link downlink signal is determined based on the control link downlink reference signal and the downlink physical channel with the highest priority or closest to the current time.

[0113] As can be seen, the physical channel of the control link may be selected by defining the priority between the downlink reference signal (e.g., CSI-RS, SSB) and the downlink physical channel (e.g., PDCCH and PDSCH) according to the protocol specifications. For example, assuming that the SSB priority is lower than the PDCCH priority and lower than the PDSCH priority, if no dedicated TCI is configured for PDCCH and PDSCH, the backhaul link of the relay equipment will choose to use SSB as the reference channel for the QCL configuration. If the network-side equipment has a TCI configured for PDCCH but not for PDSCH, the backhaul link of the relay equipment will choose to operate with the PDCCH TCI configuration. If the network-side equipment has a TCI configured for PDSCH, the backhaul link of the relay equipment will choose to operate with the PDSCH TCI configuration. Furthermore, for example, among several different types of CORESETs of the control link PDCCH, the CORESET with the smallest CORESET number may be defined as having the highest priority. For example, if a control link is configured with multiple CSI-RS and / or SSB signals, the reference signal with the smallest port number is preferentially selected as the reference signal included in the TCI configuration of the downlink signal of the backhaul link. For example, if a control link is configured with a dynamic scheduling PDSCH and a semi-static scheduling PDSCH, the TCI configuration of the semi-static scheduling PDSCH is preferentially selected as the TCI configuration of the downlink signal of the backhaul link.

[0114] Similarly, we may define similar channel or reference signal selection schemes assuming that SSB priority is lower than PDSCH priority and lower than PDCCH priority, but we will not repeat the explanation here.

[0115] Alternatively, following the proximity principle, the TCI configuration used for the transmission of the most recently transmitted control link physical channel (one of SSB, PDCCH, PDSCH, or CSI-RS) may be selected before turning on the backhaul link of the relay equipment.

[0116] Furthermore, the protocol specification may also instruct that the TCI configuration of the downlink signal be determined according to the priority of the protocol version on which the control link operates. For example, the control link may configure the TCI configuration of the control link's downlink signal according to the Rel-17 protocol version (i.e., the TCI configuration of the downlink signal is determined by the upper layer signaling information DLorJoint-TCIState or UL-TCIState), and the backhaul link may preferentially determine the candidate beamset according to the TCI configuration of the control link's Rel-17 protocol version, or determine the TCI configuration of the physical channel of the control link, or directly configure the TCI configuration of the backhaul link's downlink signal and the corresponding uplink signal transmission configuration.

[0117] Here, the method of configuring the candidate beamset of the backhaul link based on the candidate control link TCI configuration set configured as DLorJoint-TCIState or UL-TCIState, and determining the TCI configuration of the downlink signal of the backhaul link, belongs to the parallel method as described in cases A-1 to A-4 above. Selectively, the method for determining the TCI configuration of the backhaul link downlink signal based on a TCI configuration already activated and used in a candidate TCI configuration set configured as DLorJoint-TCIState or UL-TCIState may be set as the highest priority method, i.e., if DLorJoint-TCIState or UL-TCIState exists, the TCI configuration of the backhaul link downlink signal is determined based on the TCI configuration in DLorJoint-TCIState or UL-TCIState, and if neither DLorJoint-TCIState nor UL-TCIState exists, the Rel-15 / 16 protocol version determines that the candidate beamset adopts the methods described in cases A-1 to A-4 according to the TCI configuration (i.e., PDSCH-Config) that constitutes the control link downlink signal.

[0118] Selectively, the above method, If there is an overlap between the transmission of the backhaul link and the control link within the target time, the relay equipment will The relay device either receives the downlink signal of the backhaul link using a target TCI configuration or transmits the uplink signal of the backhaul link using a target uplink transmission configuration. The relay device further includes performing one of the following: not performing downlink signal transfer of the backhaul link or not performing uplink signal transfer of the backhaul link within the target time. Here, the target TCI configuration is one of the TCI configurations in which the control link is used within the target time, and the target uplink transmission configuration is an uplink transmission configuration in which the control link is used within the target time. The target time includes at least one of the time units of transmission of the control link of the relay device, a time unit before the transmission of the control link, and b time units after the transmission of the control link, where a and b are integers greater than zero, and the time unit is one of orthogonal frequency division multiplexed symbols, slots, subframes, or wireless frames.

[0119] Furthermore, the transmission of the control link by the relay equipment includes receiving the downlink signal and transmitting the uplink signal of the control link.

[0120] As can be seen from this, we may define that the priority of the TCI configuration for the downlink signal of the relay equipment's backhaul link is lower than the priority of the TCI configuration for the relay equipment's control link.

[0121] For example, if there is an overlap between the transmission of the relay device's backhaul link and the relay device's control link (including the reception of downlink signals and transmission of uplink signals on the control link) within the target time, the relay device may use the TCI configuration of the relay device's control link to receive downlink signals on the backhaul link, or use the uplink transmission configuration of the relay device's control link to transfer uplink signals, or the relay device may not transfer signals to the backhaul link within the transmission time of the control link.

[0122] Selectively, based on the protocol specifications, if there is a time overlap between the transmission of different reference signals or physical channels on the control link and the transmission on the backhaul link, the actions that the relay equipment will take may be determined accordingly. For example, during the PDCCH or PDSCH transmission time zone of the control link, the backhaul link may transmit downlink signals according to the TCI configuration of the PDCCH or PDSCH of the control link; during the PUCCH or PUSCH transmission time zone of the control link, the backhaul link may not transmit uplink signals; and during the CSI-RS transmission time zone of the control link, the backhaul link may not transmit downlink signals.

[0123] Selectively, the above method, When the TCI configuration of the control link is updated, or when the relay device receives a new TCI configuration of the downlink signal of the backhaul link transmitted by the network-side device, or when the relay device receives a sixth configuration signaling transmitted by the network-side device, the relay device further includes updating and activating the new TCI configuration of the downlink signal of the backhaul link. Here, the sixth configuration signaling is used to instruct the TCI configuration of the downlink signal of the backhaul link to be updated.

[0124] As can be seen from this, the effective time of the TCI configuration for the downlink signal of a backhaul link may be static or adaptive.

[0125] For example, after the TCI configuration of the downlink signal of the backhaul link of a relay device has been determined, it remains valid until the network-side device explicitly configures a new TCI configuration for the downlink signal of the backhaul link, or until the TCI configuration of the physical channel of the referenced control link is changed. Alternatively, for example, the TCI configuration of the downlink signal of a relay equipment's backhaul link is valid for a certain period of time after it is determined, and the length of this validity period is indicated by the protocol specification or explicitly indicated by the network-side equipment. Alternatively, for example, the TCI configuration of the downlink signal of the backhaul link of a relay device is always the same or partially the same as the most recently used TCI configuration of the control link of the relay device, i.e., the TCI configuration of the downlink signal of the backhaul link remains valid until the next signal transmission of the control link. Alternatively, for example, the protocol specification may stipulate that if QCL associations exist between the backhaul link and the control link's PDCCH of the relay device, and the control link's PDCCH updates its TCI configuration, the relay device's backhaul link also updates its TCI configuration accordingly, and the activation time of the backhaul link's TCI configuration is not earlier than the activation time of the control link's TCI configuration (for example, the backhaul link's TCI configuration is activated immediately after the control link's PDCCH's TCI configuration is activated).

[0126] Alternatively, for example, the protocol specification may stipulate that if QCL associations exist for the PDSCH of the relay equipment's backhaul link and control link, and the PDSCH of the control link updates its TCI configuration, the relay equipment's backhaul link also updates its TCI configuration accordingly, and the activation time of the backhaul link's TCI configuration is not earlier than the activation time of the control link's TCI configuration (for example, the backhaul link's TCI configuration is activated immediately after the control link's PDSCH's TCI configuration is activated).

[0127] Selectively, after the relay equipment updates and activates a new TCI configuration for the downlink signal of the backhaul link, the method The aforementioned relay device, The amplification coefficient of the downlink signal of the backhaul link is maintained as is, The amplification coefficient of the downlink signal of the backhaul link is adjusted based on a first amplification coefficient, wherein the first amplification coefficient is carried to a third configuration signaling transmitted by the network-side equipment. Based on the difference between the measurement result of the first channel and the measurement result of the second channel, the amplification coefficient of the downlink signal of the backhaul link is adjusted. Hereinafter, the first channel measurement result and the second channel measurement result are the channel measurement results before and after the new TCI configuration of the backhaul link's downlink signal is updated and activated, respectively.

[0128] Furthermore, the third configuration signaling and the first configuration signaling may be the same or different, and the channel measurement results may include at least one of the following: Reference Signal Receiving Power (RSRP) after L1 filtering, Reference Signal Receiving Quality (RSRQ), and Signal to Interference plus Noise Ratio (SINR).

[0129] As will be seen from the following, when the backhaul link of a relay device updates the TCI configuration of the downlink signal, one of the following methods 1 to 3 may be adopted for processing the amplification coefficient of the downlink signal.

[0130] Solution 1: The amplification factor of the downlink signal of the backhaul link of the relay equipment remains unchanged.

[0131] Solution 2: When the amplification coefficient adjustment value is indicated by dedicated signaling (for example, the third configuration signaling described above), the relay equipment updates the amplification coefficient of the downlink signal of the backhaul link based on the adjustment value.

[0132] Solution 3: The relay equipment self-adjusts the amplification coefficient of the backhaul link downlink signal based on the difference between the channel measurement results before and after updating the TCI configuration of the downlink signal.

[0133] Selectively, the transmission configuration of the backhaul link's uplink signal includes a transmission spatial domain filter for the backhaul link's uplink signal. The spatial receiver parameters (Spatial Rx parameter) of the downlink signal of the backhaul link, A transmission spatial domain filter (Tx spatial domain filter) for one of the uplink signals of the aforementioned control link, It relates to at least one of the receiving spatial domain filters (Rx spatial domain filter) of one of the downlink signals of the control link.

[0134] Here, the uplink signal transmission beam of the backhaul link of the relay equipment refers to the spatial domain filter transmitted by the uplink signal, and indicates the energy distribution of the uplink signal energy in different directions.

[0135] As can be seen from the above, in the embodiments of this application, the transmission configuration of the uplink signal of the backhaul link of the relay equipment may be determined based on the downlink signal of the backhaul link, or the uplink signal of the control link, or the downlink signal of the control link.

[0136] Selectively, the relay equipment determines the transmission configuration of the uplink signal of the backhaul link based on the candidate beamset. The relay equipment directly determines the transmission configuration of the uplink signal of the backhaul link based on the candidate beamset, in accordance with the protocol specifications. Or, The relay device receives the fourth configuration signaling transmitted by the network-side device. The relay equipment determines the transmission configuration of the uplink signal of the backhaul link based on the candidate beamset, based on the fourth configuration signaling. Or, The relay equipment determines the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset. The relay equipment includes determining the transmission configuration of the uplink signal of the backhaul link based on the TCI configuration of the downlink signal of the backhaul link, in accordance with the protocol specifications.

[0137] Here, since the above protocol specifications or the fourth configuration signaling contain relevant information regarding the transmission configuration of the backhaul link's uplink signal, the relay equipment can determine the transmission configuration of the backhaul link's uplink signal based on the candidate beamset, based on the above protocol specifications or the fourth configuration signaling.

[0138] As will be seen from here, in the embodiments of this application, the relay equipment may determine the transmission beam of the uplink signal of the backhaul link using the following method 1, method 2, or method 3.

[0139] Method 1: Based on the protocol specifications, the transmit beam for the uplink signal of the backhaul link is directly determined based on the candidate beamset of the control link. Method 2: Based on the received fourth configuration signaling, the transmission beam for the backhaul link's uplink signal is determined based on the candidate beamset of the control link. Method 3: After the relay equipment determines the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, the relay equipment determines the transmission configuration of the uplink signal of the backhaul link based on the TCI configuration of the downlink signal of the backhaul link, in accordance with the protocol specifications.

[0140] To make it easier to understand, the above methods 1 and 2 may be combined into a single solution. For example, if the network-side equipment does not use dedicated signaling (i.e., the fourth configuration signaling described above) to configure the uplink signal transmission beam, the relay equipment may determine the uplink signal transmission beam (i.e., method 1) according to the protocol pre-specified, and after receiving the dedicated signaling (i.e., the fourth configuration signaling described above), determine the uplink signal transmission beam based on the dedicated signaling.

[0141] Similarly, methods 3 and 2 may be combined into a single solution. For example, if the network-side equipment does not use dedicated signaling (i.e., the fourth configuration signaling) to configure the uplink signal transmission beam, the relay equipment may determine the uplink signal transmission beam using method 3 in accordance with the protocol pre-specified, and after receiving the dedicated signaling (i.e., the fourth configuration signaling), determine the uplink signal transmission beam based on the dedicated signaling.

[0142] Here, the fourth constituent signaling may be MAC CE, RRC, or DCI.

[0143] The selective determination of the transmission configuration of the backhaul link's uplink signal by the relay equipment can be divided into the following cases B-1 to B-4.

[0144] Case B-1: The protocol specification indicates that the transmit spatial domain filter for the uplink signal of the backhaul link is related to the spatial receiver parameters for the downlink signal of the backhaul link.

[0145] In other words, the transmission beam for the uplink signal of the backhaul link of a relay device may be the same as the reception beam for the downlink signal.

[0146] Case B-2: The protocol specification or the fourth configuration signaling indicates that the transmission configuration of the uplink signal of the backhaul link is determined based on the configuration of the uplink reference signal and / or uplink physical channel of the control link.

[0147] Here, the uplink reference signal of the control link may be SRS and / or PRACH, and the uplink physical channel of the backhaul link may be PUCCH or PUSCH. That is, the backhaul link of the relay equipment can determine the transmission beam of the uplink signal of the backhaul link of the relay equipment based on the PUCCH channel, PUSCH channel or SRS of the control link of the relay equipment. For example, the relay equipment determines the transmission beam of the backhaul link uplink signal based on the configuration of the nearest uplink transmission (PUCCH or PUSCH or SRS).

[0148] The following describes different cases in which the transmit beam of the uplink signal of the relay equipment's backhaul link is determined based on the PUCCH channel, PUSCH channel, or SRS of the relay equipment's control link.

[0149] (1) The SRS transmit beam may be the transmit beam of the uplink signal of the backhaul link of the relay equipment, and specifically, in terms of the time-frequency resources of SRS transmission, the transmit beam of the uplink signal of the backhaul link of the relay equipment may coincide with this SRS transmit beam.

[0150] (2) The PUCCH transmit beam is used as the transmit beam for the uplink signal of the backhaul link of the relay equipment, specifically, In the time-frequency resource where the PUCCH is located, the transmit beam of the uplink signal of the relay equipment's backhaul link coincides with the transmit beam of this PUCCH. Within the v8 time units following the PUCCH, the transmit beam of the uplink signal of the backhaul link of the relay equipment coincides with the transmit beam of the PUCCH, where this time unit may be, for example, a slot, a symbol, or a millisecond (ms).

[0151] (3) The PUSCH transmit beam is used as the transmit beam for the uplink signal of the backhaul link of the relay equipment, specifically, In the transmission time frequency resource of the aforementioned PUSCH, the transmission beam of the uplink signal of the relay equipment's backhaul link coincides with the transmission beam of this PUSCH. From the v9 time units after the PUSCH scheduling signaling is transmitted, the transmit beam of the uplink signal of the relay equipment's backhaul link coincides with this PUSCH transmit beam, and selectively, the v9 time units are greater than or equal to timeDurationForQCL. From v10 time units after the semi-static PUSCH activation signaling is transmitted, the transmit beam of the uplink signal on the relay equipment's backhaul link coincides with the transmit beam of this semi-static PUSCH, From v11 time units after the transmission of the feedback signaling corresponding to the semi-static PUSCH activation signaling, the transmit beam of the uplink signal of the relay equipment's backhaul link coincides with the transmit beam of this semi-static PUSCH, From the first PUSCH resource in semi-static scheduling, the transmit beam of the uplink signal of the relay equipment's backhaul link coincides with the transmit beam of this semi-static PUSCH, Within 12 time units after a PUSCH transmission, the transmit beam of the uplink signal of the relay equipment's backhaul link coincides with the transmit beam of this PUSCH, where this time unit can be, for example, a slot, a symbol, or a millisecond (ms). Within v13 time units after the last valid push of a semi-static push, the transmit beam of the uplink signal of the relay equipment's backhaul link coincides with the transmit beam of this semi-static push, where this time unit can be, for example, a slot, a symbol, or a millisecond (ms). Within v14 time units after the relay device receives the semi-static PUSCH deactivation signaling, the transmit beam of the relay device's backhaul link uplink signal may coincide with the transmit beam of this semi-static PUSCH.

[0152] It should be explained here that a semi-static PUSCH resource is an active resource until the control link receives new activation / configuration signaling and re-instructs information such as transmission resources / transmission beams for this semi-static PUSCH, or until the instruction information of the new activation / configuration signaling begins to take effect.

[0153] Furthermore, if the transmit beam for the uplink signal of the relay equipment's backhaul link cannot be determined based on the PUCCH / PUSCH / SRS beam for a given time period, the SSB / CSI-RS beam is adopted by default as the associated signal for the transmit beam of the uplink signal of the relay equipment's backhaul link, and the SSB / CSI-RS is the downlink reference signal that the control link most recently selected by performing random access.

[0154] Case B-3: The protocol specification or the fourth configuration signaling indicates that the transmission configuration of the uplink signal of the backhaul link is determined based on the downlink reference signal and / or downlink physical channel of the control link.

[0155] Here, a specific case in which the transmission configuration of the uplink signal is determined based on the downlink reference signal and / or downlink physical channel of the control link is similar to a specific case in which the TCI configuration of the downlink signal is determined based on the downlink reference signal and / or downlink physical channel of the control link, and can be referred to in the preceding paragraph; no further explanation is provided here.

[0156] Furthermore, it should be explained that during periods when the PDCCH / PDSCH / CSI-RS beam is not activated, the transmission beam for the uplink signal of the relay equipment's backhaul link may use a beam indicated by dedicated signaling.

[0157] Case B-4: The fourth configuration signaling indicates that one of the target candidate configurations is an uplink signal transmission configuration for the backhaul link, wherein the target candidate configuration includes a configuration indicated by the uplink signal configuration information configured for the control link.

[0158] That is, uplink signal configuration information (PUCCH-SpatialRelationInfo) configured in the control link of the relay equipment by dedicated signaling (for example, the fourth configuration signaling described above) may be used as candidate configurations for the transmission beam of the uplink signal of the backhaul link, and one of these configurations may be designated as the uplink signal transmission beam configuration for the backhaul link of the relay equipment. For example, if DLorJoint-TCIState or UL-TCIState exists, the transmission configuration of the uplink signal of the backhaul link of the relay equipment may be determined based on the TCI configuration in DLorJoint-TCIState or UL-TCIState. If DLorJoint-TCIState and UL-TCIState do not exist, the uplink signal transmission beam configuration for the backhaul link of the relay equipment may be determined by adopting the methods described in cases B-1 to B-3 above.

[0159] After selectively updating the uplink transmission configuration of the backhaul link, the method, The aforementioned relay device, Maintaining the amplification coefficient of the uplink signal of the backhaul link as is, The amplification coefficient of the uplink signal of the backhaul link is adjusted based on a second amplification coefficient, wherein the second amplification coefficient is carried to a fifth configuration signaling transmitted by network-side equipment. Based on the difference between the measurement results of the third channel and the measurement results of the fourth channel, the amplification coefficient of the uplink signal of the backhaul link is adjusted. Hereinafter, the third channel measurement result and the fourth channel measurement result are the channel measurement results before and after updating the transmission configuration of the backhaul link's uplink signal, respectively.

[0160] Furthermore, it should be explained that updating the uplink transmission configuration of the backhaul link described herein may also refer to updating the uplink transmission configuration of the backhaul link using the method for determining the uplink transmission configuration described in cases B-1 to B-4 above.

[0161] Furthermore, the fifth and fourth configuration signalings may be the same or different, and the channel measurement results may include at least one of the following: Reference Signal Receiving Power (RSRP) after L1 filtering, Reference Signal Receiving Quality (RSRQ), and Signal to Interference plus Noise Ratio (SINR).

[0162] As can be seen below, when the backhaul link of a relay device updates the transmission configuration of the uplink signal, one of the following three methods 1 to 3 may be adopted for processing the amplification coefficient of the uplink signal.

[0163] Solution 1: The amplification coefficient of the uplink signal in the backhaul link of the relay equipment remains unchanged.

[0164] Solution 2: When a dedicated signaling (e.g., the fifth configuration signaling described above) indicates an adjustment value for the amplification coefficient (i.e., the second adjustment value described above), the relay equipment updates the amplification coefficient of the uplink signal of the backhaul link based on the adjustment value.

[0165] Solution 3: The relay equipment self-adjusts the amplification coefficient of the backhaul link's uplink signal based on the difference between the channel measurement results before and after updating the uplink signal transmission configuration.

[0166] Solution 4: The adjustment value for the amplification coefficient of the uplink signal of the backhaul link of the relay equipment is multiplexed with the adjustment value for the amplification coefficient of the downlink signal of the backhaul link of the relay equipment.

[0167] Here, the second adjustment value transmitted to the fifth configuration signaling may be an adjustment value based on the amplification coefficient of the downlink signal, or it may be an adjustment value based on the conventional amplification coefficient of the uplink signal.

[0168] It should be explained here that the amplification coefficient of the uplink signal of the backhaul link of the relay equipment may be the same as or different from the amplification coefficient of the downlink signal. Network-side equipment may configure the amplification coefficients of the uplink signal and the downlink signal of the backhaul link (or the offset / correction value of the uplink signal amplification coefficient relative to the downlink signal amplification coefficient).

[0169] Additionally, selectively, during the time period in which the Rel-17 protocol version of the TCI configuration for the control link (as indicated in DLorJoint-TCIState or UL-TCIState) is enabled for the backhaul link, the beams of the backhaul link and the control link may be kept aligned, i.e., the transmit beam of the downlink signal of the backhaul link of the relay equipment aligns with the transmit beam of the downlink signal of the control link, and the transmit beam of the uplink signal of the backhaul link of the relay equipment aligns with the transmit beam of the uplink signal of the control link.

[0170] Selectively, for a backhaul link, the receiving beam for the downlink signal and the transmitting beam for the uplink signal of the relay equipment's backhaul link are determined based on the TCI instruction beam, from v14 time units after the transmission of the control link's TCI instruction information to v14 time units after the transmission of the next control link's TCI instruction information, or within v15 time units transmitted by the feedback information corresponding to the next TCI instruction information.

[0171] Selectively, for the SSB / PRACH of the control link, a time domain unit in which several specified SRS / CSI-RS / CORESETs are located (or this time domain unit extends a single time period forward and / or backward) may use the beam determination method described in cases A-1 to A-4 and cases B-1 to B-4 above.

[0172] The validity period of the transmission configuration for the uplink signal of the backhaul link of the relay equipment may be indicated statically, adaptively, or semi-statically (i.e., indicating the transmission configuration for the backhaul link uplink signal and simultaneously indicating the length of the validity period).

[0173] For example, after the transmission configuration for the uplink signal of a relay device's backhaul link has been determined, it remains valid until the network-side device explicitly configures a new transmission configuration for the uplink signal of the backhaul link, or until the transmission configuration of the physical channel of the referenced control link is changed. Alternatively, for example, it is valid for a certain period of time after the transmission configuration of the backhaul link of the relay equipment has been determined, and the length of the valid period is indicated by the protocol specification or explicitly indicated by the network-side equipment. Alternatively, for example, the transmission configuration of the uplink signal on the backhaul link of a relay device is always the same as the transmission configuration of the uplink signal most recently used by the control link of the relay device; that is, the transmission configuration of the uplink signal on the backhaul link of the relay device remains valid until the next uplink signal transmission by the control link. Alternatively, for example, the protocol specification may stipulate that if a QCL association exists between the backhaul link and the control link's PUCCH of the relay equipment, and the control link's PUCCH updates its transmit configuration, the relay equipment's backhaul link also updates its uplink signal transmit configuration accordingly, and that the activation time of the backhaul link's uplink signal transmit configuration is not earlier than the activation time of the control link's PUCCH transmit configuration (for example, the backhaul link's uplink signal transmit configuration is activated immediately after the control link's PUCCH transmit configuration is activated).

[0174] Alternatively, for example, the protocol specification may stipulate that if a QCL association exists between the backhaul link and the control link PUSCH of the relay equipment, and the control link PUSCH updates its transmit configuration, the backhaul link of the relay equipment will also update its uplink signal transmit configuration accordingly, and the activation time of the backhaul link's uplink signal transmit configuration will not be earlier than the activation time of the control link PUSCH transmit configuration (for example, the backhaul link's uplink signal transmit configuration will be activated immediately after the control link PUSCH's transmit configuration is activated).

[0175] Alternatively, for example, the protocol specifies that the uplink transmission configuration of a relay device's backhaul link is related to the downlink signal TCI configuration of the backhaul link, and that when the downlink TCI configuration of the backhaul link is updated, the relay device's backhaul link also updates its uplink transmission configuration accordingly, and that the activation time of the uplink transmission configuration of the backhaul link is not earlier than the activation time of the downlink signal TCI configuration of the backhaul link.

[0176] Furthermore, the relay equipment described herein may also be relay equipment having signal transmission capabilities such as an NCR, or a Reconfigurable Intelligence Surface (RIS), supersurface, reflective surface, or intelligent reflective surface.

[0177] In summary, in the embodiments of this application, assuming that the control link and backhaul link of the relay equipment share radio frequency hardware, the backhaul link of the relay equipment can determine its own transmit and receive beams by utilizing the beamtraining or beamforming information of the control link, thereby reducing the complexity of beam control of the backhaul link of the relay equipment and avoiding additional beamtraining overhead.

[0178] In a second aspect, referring to Figure 4, an embodiment of the present application provides a method for determining the transmission configuration of a backhaul link, the method which may include the following steps.

[0179] Step 401: The network-side equipment determines the configurable candidate beamsets for the control link.

[0180] Step 402: The network-side equipment transmits the beam configuration signaling of the backhaul link to the relay equipment.

[0181] Here, the beam configuration signaling is used to instruct the relay equipment to determine the transmission configuration instruction TCI configuration and / or transmission configuration for the backhaul link's downlink signals based on a configurable candidate beamset for the control link.

[0182] Furthermore, this beam configuration signaling may further include the first and / or fourth configuration signaling described above, where the first configuration signaling is used to instruct the relay equipment to determine the TCI configuration of the backhaul link downlink signal based on the candidate beamset of the control link, and the fourth configuration signaling is used to instruct the relay equipment to determine the transmission configuration of the backhaul link uplink signal based on the candidate beamset of the control link.

[0183] That is, instruction information for determining the TCI configuration of the backhaul link downlink signal based on the candidate beamset of the control link, and instruction information for determining the backhaul link uplink transmission configuration based on the candidate beamset of the control link, may be carried on the same signaling or on different signaling.

[0184] Step 403: The network-side equipment determines the transmit beam for the downlink signal and / or receive beam for the uplink signal of the backhaul link based on the candidate beamset, based on the beam configuration signaling or protocol specification.

[0185] Here, in step 403, the transmit beam for the downlink signal and / or receive beam for the uplink signal in the backhaul link of the network-side equipment are determined.

[0186] What needs to be explained here is that a backhaul link is a link between a relay device and a network-side device. In a backhaul link, the network-side device transmits the downlink signal, and the relay device receives the downlink signal.

[0187] Here, after the network-side equipment transmits the beam configuration signaling to the relay equipment, the relay equipment can determine the transmission configuration instruction TCI configuration and / or transmission configuration of the backhaul link's downlink signal based on the candidate beamset of the control link (i.e., determine the receiving beam of the downlink signal and / or transmitting beam of the uplink signal in the relay equipment's backhaul link), and the network-side equipment can determine the transmitting beam of the downlink signal and / or receiving beam of the uplink signal in the backhaul link based on the beam configuration signaling or protocol specification and the candidate beamset of the control link.

[0188] As can be seen from the following, in the embodiments of this application, network-side equipment can transmit beam configuration signaling for the backhaul link to relay equipment, thereby enabling relay equipment to determine the TCI configuration for the downlink signal and / or the transmission configuration for the uplink signal of the backhaul link based on the candidate beamset of the control link, and network-side equipment can also determine the transmission beam for the downlink signal and / or the reception beam for the uplink signal and the reception beam for the uplink signal of the backhaul link based on this beam configuration signaling or protocol specification and the candidate beamset of the control link. That is, in the embodiments of this application, the reception beam for the downlink signal and / or the transmission beam for the uplink signal of the backhaul link of the relay equipment may be selected from the candidate beamset of the control link, and the transmission beam for the downlink signal and / or the reception beam for the uplink signal of the backhaul link of the network-side equipment may be selected. Accordingly, embodiments of this application provide a method for determining the reception beam for the downlink signal and / or the transmission beam for the uplink signal of the backhaul link.

[0189] Selectively, the candidate beamsets are A beam corresponding to the candidate TCI configuration information of the control link, A beam corresponding to the downlink reference signal of the control link, The beam corresponding to the downlink physical channel of the control link, A beam corresponding to the uplink reference signal of the control link, It includes at least one of the following: the uplink physical channel of the control link and the beam corresponding to that channel.

[0190] Here, the candidate TCI configuration described above is an available but not activated TCI configuration, the downlink reference signal of the control link described above may include SSB and / or CSI-RS, the downlink physical channel of the control link described above may include PDCCH and / or PDSCH, the uplink reference signal of the control link described above may include SRS and / or PRACH, and the uplink physical channel of the control link described above may include PUCCH and / or PUSCH.

[0191] Selectively, network-side equipment determines the transmit beam for the downlink signal of the backhaul link based on candidate beamsets, which can be divided into cases C-1 to C-4 described below.

[0192] Case C-1: If the protocol specification or the beam configuration signaling indicates that the downlink reference signal and / or downlink physical channel of the control link has a QCL relationship with the backhaul link, the transmit beam of the downlink signal of the backhaul link is determined based on the downlink reference signal and / or downlink physical channel of the control link.

[0193] The situation in Case C-1 is described in detail below.

[0194] C-1.1: Selectively, if the protocol specification or beam configuration signaling indicates that a QCL relationship exists between the downlink reference signal of the control link and the backhaul link, the transmit beam of the downlink signal of the backhaul link is the same as the transmit beam of the downlink reference signal of the control link.

[0195] Here, the downlink reference signal of the control link described above may be SSB or CSI-RS.

[0196] The following describes two different cases where the downlink reference signals used to establish the backhaul link and QCL relationship are SSB and CSI-RS, respectively.

[0197] (1) When protocol specifications or beam configuration signaling indicate that QCL associations exist for the SSB of the backhaul link and the control link, the relay equipment may select the transmit beam of the SSB used in the most recent random access process for the control link and the transmit beam of the downlink signal for the backhaul link, with specific implementation details as follows:

[0198] Selectively: From the perspective of network-side equipment, in terms of the time-frequency resources transmitted by SSB, the transmit beam of the downlink signal on the backhaul link coincides with the transmit beam of the SSB on the control link.

[0199] Selectively, if a QCL relationship exists between the control link SSB and the backhaul link, and the SSB identification information (e.g., SSB number) is carried in a second configuration signaling transmitted from the network-side equipment to the relay equipment, the transmit beam of the backhaul link downlink signal is the same as the transmit beam of the SSB corresponding to the SSB identification information carried in the second configuration signaling. Here, the second configuration signaling may be MAC CE, RRC, or DCI. Furthermore, this second configuration signaling may be the same as or different from the beam configuration signaling described above.

[0200] Here, the SSB identified by the SSB identification information carried to the second configuration signaling may differ from the SSB in the process of random access by the relay equipment.

[0201] (2) When the protocol specification or beam configuration signaling indicates that QCL-related information exists in the CSI-RS of the backhaul link and control link, the backhaul link of the relay equipment shall select the CSI-RS to be the reference beam for QCL, and the specific implementation details are exemplified below.

[0202] Selectively: From the perspective of the network-side equipment, in the time-frequency resources transmitted by CSI-RS, the transmit beam of the backhaul link downlink signal coincides with the CSI-RS transmit beam of the control link.

[0203] C-1.2: If the protocol specification or beam configuration signaling indicates that a QCL relationship exists between the downlink physical channel of the control link and the backhaul link, the transmit beam of the downlink signal of the backhaul link is the same as the transmit beam of the downlink physical channel of the control link.

[0204] Here, the downlink physical channel may be either a PDCCH or a PDSCH. The following describes different cases where the downlink physical channels establishing the backhaul link and QCL relationship are PDCCH and PDSCH, respectively.

[0205] (1) If the protocol specification or beam configuration signaling indicates that QCL associations exist in the PDCCH of the backhaul link and control link, the specific implementation details may be as follows:

[0206] Selectively, from the perspective of network-side equipment, in the time-frequency resource where a particular search space or a particular coreset of a PDCCH is located, the downlink signal transmission beam of the backhaul link coincides with the beam of the PDCCH in that particular search space or coreset. Here, the method for determining a particular coreset may be predefined by the protocol (e.g., specifying that the coreset corresponding to a Type 0 PDCCH is a particular coreset, or that the coreset with the smallest coreset number is a particular coreset), or it may be configured by the network side (i.e., the signaling transmitted by the network-side equipment may carry coreset identification information (e.g., a coreset code), and the coreset indicated by this identification information is a particular coreset). Similarly, the method for determining a particular search space is similar to the method for determining a particular coreset and will not be described further here.

[0207] Selectively, from the perspective of the network-side equipment, within v1 time units after a specific search space or coreset of the PDCCH, the downlink signal transmit beam of the backhaul link coincides with the beam of the PDCCH in that specific search space or coreset, where this time unit is, for example, a slot, symbol, or millisecond.

[0208] (2) If the protocol specification or beam configuration signaling indicates that a QCL association exists for the PDSCH of the backhaul link and the control link, the transmit beam of the downlink signal of the backhaul link is the same as the transmit beam of the PDSCH.

[0209] If the control link selectively schedules both dynamic and semi-static PDSCH, the backhaul link downlink signal transmit beam can preferentially select the transmit beam of the semi-static PDSCH.

[0210] In other words, the control link includes PDSCH for dynamic scheduling and PDSCH for semi-persistent scheduling (SPS). Considering that the backhaul link needs to be on for an extended period, the transmit beam of the downlink signal for the backhaul link may be the same as the transmit beam of the semi-persistent scheduling PDSCH for the control link.

[0211] The specific details of how such cases can be implemented are illustrated below.

[0212] Selectively, from the perspective of the network-side equipment, within v2 time units after PDSCH transmission, the transmit beam of the backhaul link downlink signal coincides with the control link PDSCH beam. Selectively, the value of v2 remains valid until specified by the protocol, explicitly configured by the network side, or a new TCI configuration is made for the PDSCH, or remains valid until the next control link PDCCH / PDSCH transmission.

[0213] Selectively, from the perspective of the network-side equipment, the transmit beam of the backhaul link downlink signal coincides with the PDSCH beam of the control link's semi-static scheduling for v3 time units after the PDSCH SPS activation signaling has been transmitted. These v3 time units are greater than or equal to the pseudo-collocation time length (timeDurationForQCL).

[0214] Selectively, from the perspective of the network-side equipment, the backhaul link downlink signal transmission beam coincides with the control link semistatic scheduling PDSCH beam from v4 time units after the transmission of the feedback signaling corresponding to the PDSCH's SPS activation signaling. The v4 time units are greater than or equal to the pseudo-collocation time length (timeDurationForQCL).

[0215] Selectively, from the perspective of the network-side equipment, the transmit beam of the downlink signal for the backhaul link from the first PDSCH resource of the SPS coincides with the beam of the semi-static scheduling PDSCH for the control link.

[0216] Selectively, from the perspective of the network-side equipment, within v5 time units after the PDSCH transmission of the semi-static scheduling of the control link, the transmit beam of the backhaul link downlink signal coincides with the beam of the PDSCH of the semi-static scheduling of the control link. Here, this time unit can be, for example, a slot, a symbol, or a millisecond (ms).

[0217] Selectively, from the perspective of the network-side equipment, within v6 time units after the last valid PDSCH of the SPS, the transmit beam of the backhaul link downlink signal coincides with the beam of the semi-static scheduling PDSCH of the control link.

[0218] Selectively, from the perspective of the network-side equipment, within v7 time units after the relay equipment receives the SPS deactivation signaling, the transmit beam of the backhaul link downlink signal coincides with the PDSCH beam of the control link's semi-static scheduling.

[0219] It should be noted that the TCI configuration of a semi-static PDSCH remains in effect until the control link receives a new TCI activation signaling / configuration signaling and re-instructs the TCI configuration for this semi-static PDSCH, or until the TCI instruction information of the new semi-static PDSCH activation signaling / configuration signaling begins to take effect.

[0220] That is, after the activation time for the transmit beam of the current backhaul link's downlink signal has ended, the backhaul link of the network-side equipment re-determines the transmit beam of the backhaul link's downlink signal based on the physical channel of the control link, in accordance with protocol specifications or beam configuration signaling instructions. For example, after a semi-static PDSCH is deactivated, the network-side equipment determines the transmit beam of the backhaul link's downlink signal using a transmit beam that dynamically schedules the PDSCH or PDCCH, or the transmit beam of the SSB selected in the most recent random access process of the control link.

[0221] Furthermore, it should be explained that during periods when the PDCCH / PDSCH / CSI-RS beam is not enabled (for example, in a certain scenario, no beam is configured for PDCCH / PDSCH / CSI-RS, or a beam is configured but not enabled), the transmit beam for the downlink signal of the backhaul link of the network-side equipment may, by default, use the SSB beam, or use the beam indicated by dedicated signaling.

[0222] C-1.3: The transmit beam for the backhaul link downlink signal is determined based on the control link downlink reference signal and the transmit beam with the highest priority or closest to the current time in the downlink physical channel.

[0223] As can be seen, the physical channel of the control link may be selected by defining the priority between the downlink reference signal (e.g., CSI-RS, SSB) and the downlink physical channel (e.g., PDCCH and PDSCH) according to the protocol specifications. For example, assuming that the SSB priority is lower than the PDCCH priority and lower than the PDSCH priority, if no dedicated TCI is configured for PDCCH and PDSCH, the transmit beam of the downlink signal on the backhaul link of the network-side equipment is the same as the transmit beam of SSB; if the network-side equipment has a TCI for PDCCH but not for PDSCH, the transmit beam of the downlink signal on the backhaul link of the network-side equipment is the same as the transmit beam of PDCCH; and if the network-side equipment has a TCI for PDSCH, the transmit beam of the downlink signal on the backhaul link of the network-side equipment is the same as the transmit beam of PDSCH. Furthermore, for example, among several different types of CORESETs of the control link PDCCH, the CORESET with the smallest CORESET number is defined to have the highest priority. For example, if multiple CSI-RS and / or SSBs are configured on the control link, the transmit beam of the reference signal with the smallest port number is preferentially selected and used as the transmit beam for the downlink signal of the backhaul link of the network-side equipment. Also, for example, if a dynamic scheduling PDSCH and a semi-static scheduling PDSCH are configured on the control link, the transmit beam of the semi-static scheduling PDSCH is preferentially selected as the transmit beam for the downlink signal of the backhaul link of the network-side equipment. Similarly, it may be assumed that the SSB priority is lower than the PDSCH priority and lower than the PDCCH priority, and this explanation will not be repeated here.

[0224] Alternatively, following the proximity principle, the transmit beam for the downlink signal of the backhaul link of the network-side equipment may be determined based on the beam of the most recently transmitted physical channel (one of SSB, PDCCH, PDSCH, or CSI-RS) of the control link before choosing to turn on the backhaul link. Case C-2: If the beam configuration signaling includes target identification information, the transmit beam for the downlink signal of the backhaul link is the same as the beam corresponding to the TCI configuration indicated by the target identification information, and the target identification information indicates one of the candidate TCI configuration sets of the control link.

[0225] Selectively, the TCI configuration indicated by the target identification information is one of the M candidate TCI configurations indicated in the upper layer configuration information, or one of the N TCI configurations indicated in the TCI activation command of the control link, where M and N are both integers greater than 0. Here, the N TCI configurations are a part of the M TCI configurations.

[0226] In other words, the TCI configuration corresponding to the transmit beam of the downlink signal of the backhaul link of the network-side equipment may be selected from M candidate TCI configurations provided in the higher-layer configuration information (e.g., PDSCH-Config), or it may be selected from N TCI configurations in the MAC CE TCI activation command for the control link.

[0227] Case C-3: If the beam configuration signaling includes a TCI configuration, the transmitting beam for the downlink signal of the backhaul link is the beam corresponding to the TCI configuration in the beam configuration signaling.

[0228] In other words, specific parameters of the TCI configuration of the backhaul link of the relay equipment may be directly indicated by dedicated signaling (i.e., the beam configuration signaling described above). In such a case, the transmit beam of the downlink signal of the backhaul link of the network-side equipment is the same as the beam corresponding to the TCI configuration in this beam configuration signaling.

[0229] Furthermore, the protocol specification may instruct the network-side equipment to determine the transmit beam of the downlink signal of the backhaul link according to the priority of the protocol version on which the control link operates. For example, the control link configures the TCI configuration of the downlink signal of the control link according to the Rel-17 protocol version (i.e., the TCI configuration of the downlink signal is configured by the upper layer signaling information DLorJoint-TCIState or UL-TCIState), and the backhaul link preferentially determines the candidate beamset according to the beam corresponding to the TCI configuration of the control link Rel-17 protocol version, or determines the TCI configuration of the physical channel of the control link, or directly determines the transmit beam of the downlink signal and the corresponding receive beam of the uplink signal of the backhaul link of the network-side equipment.

[0230] Here, the method of configuring a candidate beamset for the backhaul link based on a candidate control link TCI configuration set configured as DLorJoint-TCIState or UL-TCIState, and determining the transmit beam for the downlink signal of the backhaul link of the network-side equipment, belongs to the parallel method with the methods described in cases C-1.1 to C-1.3 and C-2 to C-3 above. Selectively, the method of determining the transmit beam for the downlink signal of the backhaul link of the network-side equipment based on a TCI configuration already activated and used in a candidate TCI configuration set configured as DLorJoint-TCIState or UL-TCIState may be set as the highest priority method, i.e., if DLorJoint-TCIState or UL-TCIState exists, the transmit beam for the downlink signal of the backhaul link is determined based on the TCI configuration in DLorJoint-TCIState or UL-TCIState, and if DLorJoint-TCIState and UL-TCIState do not exist, the methods described in cases C-1.1 to C-1.3 and C-2 to C-3 above may be adopted.

[0231] Selectively, the above method, If there is an overlap in the transmission between the backhaul link and the control link within the target time, the network-side equipment will The network-side equipment transmits the downlink signal of the backhaul link using a target transmit beam or receives the uplink signal of the backhaul link using a target receive beam. The network-side equipment performs one of the following actions within the target time: either it fails to transmit the downlink signal of the backhaul link or it fails to receive the uplink signal of the backhaul link. Here, the target transmit beam is the downlink transmit beam used by the control link within the target time, and the target receive beam is the uplink receive beam used by the control link within the target time. The target time includes at least one of the time units of transmission of the control link of the network-side equipment, a time unit before the transmission of the control link, and b time units after the transmission of the control link, where a and b each represent integers greater than zero, and the time unit is further one of orthogonal frequency division multiplexed symbols, slots, subframes, and wireless frames.

[0232] Furthermore, the transmission of the control link by the network-side equipment includes the transmission of downlink signals and the reception of uplink signals on the control link.

[0233] As can be seen from this, the priority of the transmit beam of the downlink signal on the backhaul link of the network-side equipment may be defined as being lower than the priority of the transmit beam of the downlink signal on the control link of the network-side equipment.

[0234] For example, if there is an overlap between the transmission of the backhaul link of the network-side equipment and the control link of the network-side equipment (including the reception of downlink signals and transmission of uplink signals of the control link) within the target time, the network-side equipment may use the transmission beam of the downlink signal of the network-side equipment's control link to receive the downlink signal of the backhaul link, or use the reception beam of the uplink signal of the network-side equipment's control link to receive the uplink signal of the backhaul link, or the network-side equipment may not transmit signals to the backhaul link within the transmission time of the control link.

[0235] Selectively, based on the protocol specifications, the network-side equipment may determine the course of action to take when there is a time overlap between the transmission of different reference signals or physical channels on the control link and the transmission on the backhaul link. For example, during the PDCCH or PDSCH transmission time zone of the control link, the backhaul link of the network-side equipment may transmit backhaul link downlink signals according to the TCI configuration of the PDCCH or PDSCH of the control link; during the PUCCH or PUSCH transmission time zone of the control link, the backhaul link of the network-side equipment may not receive uplink signals; and during the CSI-RS transmission time zone of the control link, the backhaul link of the network-side equipment may not transmit downlink signals.

[0236] Furthermore, the effective time of the transmit beam of the downlink signal on the backhaul link of the network-side equipment may be static, adaptive, or semi-static.

[0237] For example, after the transmit beam for the downlink signal of the backhaul link of the network-side equipment has been determined, it remains active until a new transmit beam for the downlink signal of the backhaul link is configured, or the transmit beam of the physical channel of the referenced control link is changed. Alternatively, for example, the transmit beam of the downlink signal on the backhaul link of network-side equipment is valid for a certain period of time after it is determined, and the length of this validity period is specified by the protocol. Alternatively, for example, the transmit beam of the downlink signal on the backhaul link of the network-side equipment always matches the transmit beam most recently used by the control link, meaning the transmit beam of the downlink signal on the backhaul link remains active until the control link transmits its next signal. Alternatively, for example, the protocol specification may stipulate that if a QCL association exists between the backhaul link and the control link's PDCCH, and the control link's PDCCH updates its transmit beam, the network-side equipment's backhaul link will also update its downlink signal transmit beam accordingly, and the activation time of the backhaul link's downlink signal transmit beam will not be earlier than the activation time of the control link's PDCCH transmit beam (for example, the backhaul link's transmit beam will be activated immediately after the control link's PDCCH transmit beam is activated).

[0238] Alternatively, for example, the protocol specification may stipulate that if QCL associations exist for the backhaul link and the control link PDSCH, and the control link PDSCH updates its TCI configuration, the network-side equipment's backhaul link will also update its downlink signal transmit beam accordingly, and that the activation time of the backhaul link's downlink signal transmit beam will not be earlier than the activation time of the control link's PDSCH transmit beam (for example, the backhaul link's transmit beam will be activated immediately after the control link's PDSCH transmit beam is activated).

[0239] Selectively, the above method, The network-side equipment further includes transmitting a sixth configuration signaling to the relay equipment, which is used to instruct the relay equipment to update the TCI configuration of the downlink signals of the backhaul link.

[0240] In other words, the network-side equipment may also instruct the relay equipment on when to update the TCI configuration of the downlink signal of the backhaul link.

[0241] Selectively, the network-side equipment determines the reception configuration for the uplink signal of the backhaul link based on the candidate beamset, which can be divided into cases D-1 to D-4 described below.

[0242] Case D-1: The protocol specifies that the receiving beam of the uplink signal of the backhaul link is the same as the transmitting beam of the downlink signal of the backhaul link.

[0243] In other words, the receiving beam of the uplink signal on the backhaul link of the network-side equipment may be the same as the transmitting beam of the downlink signal.

[0244] Case D-2: The protocol specification or beam configuration signaling indicates that the received beam of the uplink signal of the backhaul link is determined based on the received beam of the uplink reference signal and / or uplink physical channel of the control link.

[0245] Here, the uplink reference signal of the control link may be SRS and / or PRACH, and the uplink physical channel of the backhaul link may be PUSCH or PUSCH. That is, the backhaul link of the network-side equipment can determine the received beam of the uplink signal of the backhaul link of the network-side equipment based on the PUCCH channel or PUSCH channel or SRS or PRACH of the control link. For example, the network-side equipment determines the received beam of the backhaul link uplink signal based on the beam of the most recent uplink transmission (PUCCH or PUSCH or SRS or PRACH).

[0246] The following describes different cases for determining the received beam of the uplink signal on the backhaul link of a network-side device based on the PUCCH channel, PUSCH channel, SRS, or PRACH of the control link of the network-side device.

[0247] (1) Using the SRS received beam as the received beam of the uplink signal of the backhaul link of the network-side equipment means that, in terms of the time-frequency resources of SRS transmission, the received beam of the uplink signal of the backhaul link of the network-side equipment may coincide with this SRS received beam.

[0248] (2) Setting the PUCCH reception beam as the reception beam of the uplink signal of the backhaul link of the network-side device specifically means that in the time-frequency resource where the PUCCH is located, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this PUCCH, and within v8 time units after the PUCCH, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this PUCCH, where this time unit may be, for example, a slot or a symbol or a millisecond (ms).

[0249] (3) Setting the PUSCH reception beam as the reception beam of the uplink signal of the backhaul link of the network-side device specifically means that in the transmission time-frequency resource of the PUSCH, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this PUSCH, and from v9 time units after the PUSCH scheduling signaling is transmitted, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this PUSCH. Optionally, the v9 time units are not less than timeDurationForQCL, and from v10 time units after the semi-static PUSCH activation signaling is transmitted, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this semi-static PUSCH, and from v11 time units after the feedback signaling corresponding to the semi-static PUSCH activation signaling is transmitted, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this semi-static PUSCH, and From the first PUSCH resource of semi-static scheduling, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this semi-static PUSCH, and Within v12 time units after PUSCH transmission, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this PUSCH, where this time unit is, for example, a slot or a symbol or a millisecond (ms), and Within v13 time units after the last valid PUSCH of the semi-static PUSCH, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this semi-static PUSCH, where this time unit is, for example, a slot or a symbol or a millisecond (ms), and It may be one of the following: within v14 time units after the network-side device transmits semi-static PUSCH deactivation signaling, the reception beam of the uplink signal of the backhaul link of the network-side device coincides with the reception beam of this semi-static PUSCH.

[0250] Here, it should be noted that the semi-static PUSCH resource is an activated resource until the control link receives new activation signaling / configuration signaling and re-instructs information such as transmission resources / transmission beams for this semi-static PUSCH, or until the instruction information of the new activation signaling / configuration signaling starts to be activated.

[0251] Also, for a certain time period, when the reception beam of the uplink signal of the backhaul link of the network-side device cannot be determined based on the PUCCH / PUSCH / SRS beam, by default, the reception beam of the SSB / CSI-RS is adopted as the reception beam of the uplink signal of the backhaul link of the network-side device, and the SSB / CSI-RS is the downlink reference signal selected by the control link performing random access most recently.

[0252] Case D-3: The protocol specification or beam configuration signaling indicates that the received beam of the uplink signal of the backhaul link is determined based on the downlink reference signal of the control link and / or the transmitted beam of the downlink physical channel.

[0253] Here, the specific case of determining the received beam of the uplink signal of the backhaul link of network-side equipment based on the downlink reference signal and / or downlink physical channel of the control link is similar to the specific situation of determining the transmitted beam of the downlink signal of the backhaul link of network-side equipment based on the downlink reference signal and / or downlink physical channel of the control link, and can be referred to in the preceding paragraph; no further explanation is provided here.

[0254] Furthermore, it should be explained that during periods when the PDCCH / PDSCH / CSI-RS beam is not enabled, the receiving beam for the uplink signal of the backhaul link of the network-side equipment may use a beam indicated by dedicated signaling.

[0255] Case D-4: The beam configuration signaling indicates that the beam corresponding to one of the target candidate configurations is the receiving beam of the uplink signal of the backhaul link, where the target candidate configuration includes configurations indicated by uplink signal configuration information configured in the control link.

[0256] In other words, uplink signal configuration information (PUCCH-SpatialRelationInfo) configured on the control link of the network-side equipment by dedicated signaling (for example, the beam configuration signaling described above) may be used as candidate configurations for the receiving beam of the uplink signal of the backhaul link, and the system may instruct the network-side equipment to transmit and receive the beam corresponding to one of these configurations as the uplink signal of the backhaul link. For example, if DLorJoint-TCIState or UL-TCIState exists, the receiving beam of the uplink signal of the backhaul link of the network-side equipment may be the beam corresponding to the TCI configuration in DLorJoint-TCIState or UL-TCIState. If DLorJoint-TCIState and UL-TCIState do not exist, the uplink signal receiving beam of the backhaul link of the network-side equipment may be determined by adopting the methods described in cases B-1 to B-3 above.

[0257] Furthermore, the effective time of the received beam of the uplink signal on the backhaul link of the network-side equipment may be static, adaptive, or semi-static.

[0258] For example, after the receive beam of the uplink signal of the backhaul link of the network-side equipment has been determined, it remains valid until a new receive beam of the uplink signal of the backhaul link is configured, or until the receive beam of the physical channel of the referenced control link changes. Alternatively, for example, the received beam of the uplink signal on the backhaul link of a network-side device is valid for a certain period of time after it is determined, and the length of this validity period is specified by the protocol. Alternatively, for example, the uplink signal reception beam of the backhaul link of the network-side equipment is always the same as the uplink signal reception beam most recently used by the control link of the network-side equipment; that is, the uplink signal reception beam of the backhaul link of the network-side equipment remains valid until the next uplink signal reception of the control link. Alternatively, for example, the protocol specification may stipulate that if a QCL association exists between the backhaul link and the control link PUCCH of the network-side equipment, and the control link PUCCH updates its receive beam, the backhaul link of the network-side equipment should also update its uplink signal receive beam accordingly, and that the activation time of the backhaul link's uplink signal receive beam should not be earlier than the activation time of the control link's PUCCH receive beam (for example, the backhaul link's uplink signal receive beam should be activated immediately after the control link's PUCCH receive beam is activated).

[0259] Alternatively, for example, the protocol specification may stipulate that if a QCL association exists between the backhaul link and the control link PUSCH of the network-side equipment, and the control link PUSCH updates its received beam, the backhaul link of the network-side equipment should also update its uplink signal received beam accordingly, and that the activation time of the backhaul link's uplink signal received beam should not be earlier than the activation time of the control link PUSCH's received beam (for example, the backhaul link's uplink signal received beam should be activated immediately after the control link PUSCH's received beam is activated).

[0260] Alternatively, for example, the protocol specifies that if the backhaul link uplink receive beam of a network-side device is related to the backhaul link downlink signal transmit beam, and the backhaul link downlink transmit beam is updated, the backhaul link also updates its uplink signal receive beam accordingly, and the activation time of the backhaul link's uplink signal receive beam is not earlier than the activation time of the backhaul link's downlink signal transmit beam.

[0261] In the embodiment of the present application, the method for determining the transmission configuration of a backhaul link may be implemented by a backhaul link transmission configuration determination device. In the embodiment of the present application, the backhaul link transmission configuration determination device will be described as an example in which the backhaul link transmission configuration determination device performs the method for determining the transmission configuration of a backhaul link.

[0262] According to a third aspect, an embodiment of the present application provides a transmission configuration determination device for a backhaul link, and as shown in Figure 5, this backhaul link transmission configuration determination device 50 is A candidate beamset acquisition module 501 for acquiring a configurable candidate beamset for the control link, The system includes a first configuration determination module 502 for determining the transmission configuration instruction TCI configuration and / or transmission configuration for the backhaul link's downlink signal based on the candidate beamset.

[0263] Selectively, the candidate beamsets are A beam corresponding to the candidate TCI configuration information of the control link, A beam corresponding to the downlink reference signal of the control link, The beam corresponding to the downlink physical channel of the control link, A beam corresponding to the uplink reference signal of the control link, It includes at least one of the following: the uplink physical channel of the control link and the beam corresponding to that channel.

[0264] Selectively, the first configuration determination module is: Based on the protocol specifications, a first determination submodule for determining the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, Or, A first receiving submodule for receiving a first configuration signaling transmitted by a network-side device, The system includes a second determination submodule for determining the TCI configuration of the downlink signal of the backhaul link based on the first configuration signaling and the candidate beamset.

[0265] Optionally, when the protocol specification or the first configuration signaling indicates that there is a QCL relationship between the downlink reference signal of the control link and / or the downlink physical channel and the backhaul link, the TCI configuration of the downlink signal of the backhaul link is determined based on the downlink reference signal of the control link and / or the downlink physical channel, or, when the first configuration signaling includes target identification information, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration indicated by the target identification information, and the target identification information indicates one TCI configuration among the candidate TCI configuration sets of the control link, or, when the first configuration signaling includes a TCI configuration, the TCI configuration of the downlink signal of the backhaul link is the TCI configuration in the first configuration signaling.

[0266] Optionally, when the protocol specification or the first configuration signaling indicates that there is a QCL relationship between the downlink reference signal of the control link and the backhaul link, the reference signal included in the TCI configuration of the downlink signal of the backhaul link is the downlink reference signal of the control link, and the QCL type is determined based on the protocol specification or based on the configuration of the network-side device, or, when the protocol specification or the first configuration signaling indicates that there is a QCL relationship between the downlink physical channel of the control link and the backhaul link, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration of the downlink physical channel of the control link

[0267] Selectively, the aforementioned partial similarity means that the reference signals included in the TCI configuration are the same, and the QCL type is indicated by the protocol specification or by the configuration message.

[0268] Selectively, the TCI configuration indicated by the target identification information is one of the M candidate TCI configurations indicated in the upper layer configuration information, or one of the N TCI configurations indicated in the TCI activation command of the control link, where M and N are both integers greater than 0. Here, the N TCI configurations are a part of the M TCI configurations.

[0269] Selectively, the TCI configuration of the backhaul link downlink signal is determined based on the control link downlink reference signal and the downlink physical channel with the highest priority or the one closest to the current time.

[0270] If the relay equipment selectively determines the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, based on the first configuration signaling, the TCI configuration of the downlink signal of the backhaul link is activated from the time indicated by k+X. Here, k indicates the slot or last symbol in which the first configuration signaling resides, or the slot or last symbol in which the hybrid auto-retransmission request-acknowledgment feedback message corresponding to the first configuration signaling resides, and X is determined by the protocol specification or based on the capabilities of the relay equipment.

[0271] Selectively, the apparatus, The first processing module further includes a first processing module which ensures that the transmission between the backhaul link and the control link overlaps within the target time. Receiving the downlink signal of the backhaul link using a target TCI configuration, or transferring the uplink signal of the backhaul link using a target uplink transmission configuration, It is used to perform one of the following actions within the aforementioned target time: not performing downlink signal transfer or uplink signal transfer of the backhaul link. Here, the target TCI configuration is one of the TCI configurations in which the control link is used within the target time, and the target uplink transmission configuration is an uplink transmission configuration in which the control link is used within the target time. The target time includes at least one of the time units of transmission of the control link of the relay device, a time unit before the transmission of the control link, and b time units after the transmission of the control link, where a and b are integers greater than zero, and the time unit is one of orthogonal frequency division multiplexed symbols, slots, subframes, or wireless frames.

[0272] Selectively, the apparatus, The system further includes a first update module, which is used to update and activate the new TCI configuration of the backhaul link downlink signal when the TCI configuration of the control link is updated, or when the relay device receives a new TCI configuration of the backhaul link downlink signal transmitted by the network-side device, or when the relay device receives a sixth configuration signal transmitted by the network-side device. Here, the sixth configuration signaling is used to instruct the TCI configuration of the downlink signal of the backhaul link to be updated.

[0273] Selectively, the apparatus, The second processing module further includes a second processing module which, after the first update module has updated and activated the new TCI configuration of the downlink signal of the backhaul link, The amplification coefficient of the downlink signal of the backhaul link is maintained as is, The amplification coefficient of the downlink signal of the backhaul link is adjusted based on a first amplification coefficient, wherein the first amplification coefficient is carried to a third configuration signaling transmitted by the network-side equipment. Based on the difference between the measurement result of the first channel and the measurement result of the second channel, the amplification coefficient of the downlink signal of the backhaul link is adjusted. Hereinafter, the first channel measurement result and the second channel measurement result are the channel measurement results before and after the new TCI configuration of the backhaul link's downlink signal is updated and activated, respectively.

[0274] Selectively, the transmission configuration of the backhaul link's uplink signal includes a transmission spatial domain filter for the backhaul link's uplink signal. The spatial receiver parameters of the downlink signal of the backhaul link, A transmission space area filter for one of the uplink signals of the control link, This relates to one of the receiving spatial domain filters for one of the downlink signals of the control link.

[0275] Selectively, the first configuration determination module is: Based on the protocol specifications, a third determination submodule for determining the transmission configuration of the uplink signal of the backhaul link based on the candidate beamset, Or, Two receiving submodules for receiving a fourth configuration signaling transmitted by network-side equipment. Based on the fourth configuration signaling, and based on the candidate beamset, a fourth determination submodule for determining the transmission configuration of the uplink signal of the backhaul link, Or, A fifth determination submodule for determining the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, Based on the protocol specifications, it includes a sixth determination submodule for determining the transmission configuration of the uplink signal of the backhaul link, based on the TCI configuration of the downlink signal of the backhaul link.

[0276] Selectively, the protocol specification indicates that the transmit spatial domain filter for the uplink signal of the backhaul link is related to the spatial receiver parameters for the downlink signal of the backhaul link. Or, The protocol specification or the fourth configuration signaling indicates that the transmission configuration of the uplink signal of the backhaul link is determined based on the configuration of the uplink reference signal and / or uplink physical channel of the control link. Or, The protocol specification or the fourth configuration signaling indicates that the transmission configuration of the backhaul link's uplink signal is determined based on the control link's downlink reference signal and / or downlink physical channel. Or, The fourth configuration signaling indicates that one of the target candidate configurations is an uplink signal transmission configuration for the backhaul link, wherein the target candidate configuration includes a configuration indicated by uplink signal configuration information configured for the control link.

[0277] Selectively, the apparatus, The third processing module further includes, after the uplink transmission configuration of the backhaul link has been updated, Maintaining the amplification coefficient of the uplink signal of the backhaul link as is, The amplification coefficient of the uplink signal of the backhaul link is adjusted based on a second amplification coefficient, wherein the second amplification coefficient is carried to a fifth configuration signaling transmitted by network-side equipment. This is used to perform one of the following: adjusting the amplification coefficient of the uplink signal of the backhaul link based on the difference between the measurement results of the third channel and the measurement results of the fourth channel. Here, the third channel measurement result and the fourth channel measurement result are the channel measurement results before and after updating the transmission configuration of the backhaul link's uplink signal, respectively.

[0278] The transmission configuration determination device for the backhaul link in the embodiment of this application may be a relay device, for example, a relay device having an operating system, or it may be a component in the relay device, for example, an integrated circuit or a chip.

[0279] The transmission configuration determination device for backhaul links according to the embodiments of this application can implement each process realized by the embodiments of the three methods and achieve the same technical effects, and to avoid repetition of the explanation, it will not be explained further here.

[0280] According to a fourth aspect, an embodiment of the present application provides a transmission configuration determination device for a backhaul link, and as shown in Figure 6, this backhaul link transmission configuration determination device 60 is A candidate beamset determination module 601 for determining configurable candidate beamsets for the control link, A first transmitting module 602 is used to transmit beam configuration signaling for a backhaul link to a relay device, wherein the beam configuration signaling instructs the relay device to determine a transmission configuration instruction TCI configuration and / or transmission configuration for an uplink signal of the backhaul link based on a configurable candidate beamset of the control link. The system includes a second configuration determination module 603 for determining the transmit beam and / or receive beam for the uplink signal of the backhaul link based on the candidate beamset, based on the beam configuration signaling or protocol specification.

[0281] Selectively, the candidate beamsets are A beam corresponding to the candidate TCI configuration information of the control link, A beam corresponding to the downlink reference signal of the control link, The beam corresponding to the downlink physical channel of the control link, A beam corresponding to the uplink reference signal of the control link, It includes at least one of the following: the uplink physical channel of the control link and the beam corresponding to that channel.

[0282] Selectively, if the protocol specification or beam configuration signaling indicates that the downlink reference signal and / or downlink physical channel of the control link has a QCL relationship with the backhaul link, the transmit beam of the downlink signal of the backhaul link is determined based on the downlink reference signal and / or downlink physical channel of the control link. Or, If the beam configuration signaling includes target identification information, the transmit beam of the downlink signal of the backhaul link is the same as the beam corresponding to the TCI configuration indicated by the target identification information, and the target identification information indicates one TCI configuration from the candidate TCI configuration set of the control link. Or, If the beam configuration signaling includes a TCI configuration, the transmitting beam for the downlink signal of the backhaul link is the beam corresponding to the TCI configuration in the beam configuration signaling.

[0283] Selectively, if the protocol specification or beam configuration signaling indicates that a QCL relationship exists between the downlink reference signal of the control link and the backhaul link, the transmit beam of the downlink signal of the backhaul link is the same as the transmit beam of the downlink reference signal of the control link. Or, If the protocol specification or beam configuration signaling indicates that a QCL relationship exists between the downlink physical channel of the control link and the backhaul link, the transmit beam of the downlink signal of the backhaul link is the same as the transmit beam of the downlink physical channel of the control link.

[0284] Selectively, the TCI configuration indicated by the target identification information is one of the M candidate TCI configurations indicated in the upper layer configuration information, or one of the N TCI configurations indicated in the TCI activation command of the control link, where M and N are both integers greater than 0. Here, the N TCI configurations are a part of the M TCI configurations.

[0285] Selectively, the transmit beam for the backhaul link downlink signal is determined based on the control link downlink reference signal and the transmit beam with the highest priority or closest to the current time in the downlink physical channel.

[0286] Selectively, the apparatus, Further including a second transmitting module, the second transmitting module is used to transmit a sixth configuration signaling to the relay equipment, the sixth configuration signaling is used to instruct the backhaul link to update the TCI configuration of the downlink signals.

[0287] Selectively, the protocol specifies that the receiving beam of the uplink signal of the backhaul link is the same as the transmitting beam of the downlink signal of the backhaul link. Or, The protocol specification or beam configuration signaling indicates that the received beam of the uplink signal of the backhaul link is determined based on the received beam of the uplink reference signal and / or uplink physical channel of the control link. Or, The protocol specification or beam configuration signaling indicates that the received beam of the uplink signal of the backhaul link is determined based on the downlink reference signal of the control link and / or the transmitted beam of the downlink physical channel. Or, The beam configuration signaling indicates that the beam corresponding to one of the target candidate configurations is the receiving beam for the uplink signal of the backhaul link, where the target candidate configuration includes configurations indicated by the uplink signal configuration information configured in the control link.

[0288] The transmission configuration determination device for the backhaul link in the embodiments of this application may be an electronic device, such as an electronic device having an operating system, or a component of the electronic device, such as an integrated circuit or a chip. This electronic device may also be a network-side device. Exemplaryly, the terminal may include, but is not limited to, the types of network-side devices 12 listed above, and other devices may include servers, network-attached storage (NAS), etc., and the embodiments of this application are not specifically limited.

[0289] The transmission configuration determination device for backhaul links according to the embodiments of this application can implement each process realized by the embodiments of the 4 methods and achieve the same technical effects, and to avoid repetition of the explanation, it will not be explained further here.

[0290] Selectively, as shown in Figure 7, embodiments of the present application further provide a communication device 700 including a processor 701 and a memory 702, wherein the memory 702 stores a program or instruction that can be executed on the processor 701, for example, if the communication device 700 is a relay device, when this program or instruction is executed by the processor 701, each step of the embodiment of the backhaul link transmission configuration determination method described in the first embodiment can be realized and the same technical effect can be achieved. If the communication device 700 is a network-side device, when this program or instruction is executed by the processor 701, each step of the embodiment of the backhaul link transmission configuration determination method described in the second embodiment can be realized and the same technical effect can be achieved, and to avoid repetition of the explanation, it will not be explained further here.

[0291] Embodiments of the present application further provide network-side equipment including a processor and a communication interface, the communication interface being used to transmit beam configuration signaling for a backhaul link to a relay device, the beam configuration signaling being used to instruct the relay device to determine a transmission configuration instruction (TCI) configuration for the downlink signal and a transmission configuration for the uplink signal of the backhaul link based on a configurable candidate beamset of the control link, and the processor being used to determine the transmission beam for the downlink signal of the backhaul link based on the beam configuration signaling.

[0292] This embodiment of the network-side device corresponds to the embodiment of the network-side device method described above, and each implementation process and implementation method of the embodiment of the method described above can be applied to this embodiment of the network-side device and achieve the same technical effects.

[0293] Specifically, embodiments of this application further provide network-side equipment. As shown in Figure 8, this network-side equipment 800 includes an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84, and a memory 85. The antenna 81 and the radio frequency device 82 are connected. In the uplink direction, the radio frequency device 82 receives information via the antenna 81 and transmits the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes information to be transmitted and transmits it to the radio frequency device 82, which processes the received information and then transmits it via the antenna 81.

[0294] The method performed by the network-side equipment in the above embodiment may also be implemented in the baseband device 83, which includes a baseband processor.

[0295] The baseband device 83 may include, for example, at least one baseband board on which multiple chips are installed, and as shown in Figure 8, one of the chips is, for example, a baseband processor, which is connected to memory 85 via a bus interface, calls a program in memory 85, and performs the network-side equipment operations shown in the embodiment of the above method.

[0296] This network-side device may further include a network interface 86, which is, for example, a common public radio interface (CPRI).

[0297] Specifically, the network-side device 800 of the embodiment of the present invention further includes instructions or programs stored in memory 85 and operable on processor 84, the processor 84 can call instructions or programs in memory 85 and perform the same technical effects as those shown in Figure 4, and will not be described further here to avoid repetition.

[0298] Embodiments of this application further provide a readable storage medium on which a program or instruction is stored, and when this program or instruction is executed by a processor, each process of the embodiment of the method for determining the transmission configuration of the backhaul link described above can be realized and the same technical effects can be achieved, and to avoid repetition of the description, no further explanation is provided here.

[0299] Here, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, random access memory RAM, magnetic disk, or optical disk.

[0300] Embodiments of this application further provide a chip comprising a processor and a communication interface, the communication interface being coupled with the processor, the processor running a program or instructions and used to implement each process of the embodiment of the method for determining the transmission configuration of the backhaul link, and achieving the same technical effects, which are not described further here in order to avoid repetition of the description.

[0301] It should be understood that the chips referred to in the embodiments of this application may also be called system-level chips, system chips, chip systems, or system-on-a-chip, etc.

[0302] Embodiments of this application further provide a computer program / program product in which the computer program / program product is stored in a storage medium and executed by at least one processor, thereby realizing each process of the embodiment of the method for determining the transmission configuration of the backhaul link and achieving the same technical effects, which will not be described further here in order to avoid repetition.

[0303] Embodiments of the present application further provide a transmission configuration determination system for a backhaul link, comprising relay equipment and network-side equipment, wherein the terminal may be used to perform the steps of the backhaul link transmission configuration determination method described in the first embodiment, and the network-side equipment may be used to perform the steps of the backhaul link transmission configuration determination method described in the second embodiment.

[0304] It should be noted that in this specification, the terms “including,” “contains,” or any other variation thereof are intended to cover the non-exclusive “including,” thereby including not only those elements but also other elements not explicitly listed, or elements specific to such process, method, article, or apparatus. Unless otherwise specified, an element limited by the phrase “including one of…” is not excluded from the existence of other identical elements in a process, method, article, or apparatus containing that element. It should also be noted that the scope of methods and apparatus in embodiments of this application is not limited to performing functions in the order shown or discussed, but may include performing functions in a manner that is essentially simultaneous or in reverse order based on the functions involved, for example, performing methods described in a different procedure than that described, and adding, omitting, or combining various steps. Furthermore, features described by reference to some examples may be combined with other examples.

[0305] As will be readily apparent to those skilled in the art from the above description of the embodiments, the methods of the above embodiments can be implemented in the form of software and a necessary general-purpose hardware platform. Of course, they may also be implemented in hardware, but in many cases the former is a more preferred embodiment. With this understanding, the substantial or prior art contributions of the technical proposals of this application are embodied in the form of a computer software product, which is stored on a single storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and may include some instructions to cause a single terminal (which may be a mobile phone, computer, server, air conditioner, or network-side device, etc.) to execute the methods of each embodiment of this application.

[0306] The above describes embodiments of this application, accompanied by drawings; however, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can, by the suggestion of this application, make many forms, as long as they do not deviate from the spirit and scope protected by the claims of this application, and all of these fall within the scope of protection of this application.

Claims

1. A method for determining the transmission configuration of a backhaul link, wherein the method is: The relay equipment acquires a configurable candidate beamset for the control link, The relay equipment includes determining the transmission configuration instruction TCI configuration for the downlink signals of the backhaul link based on the candidate beamset, The aforementioned candidate beamset is A beam corresponding to the candidate TCI configuration information of the control link, A beam corresponding to the downlink reference signal of the control link, The beam corresponding to the downlink physical channel of the control link, A beam corresponding to the uplink reference signal of the control link, This includes at least one of the following: the beam corresponding to the uplink physical channel of the control link, The relay equipment determines the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, A situation in which the network-side equipment has not transmitted a first configuration signaling to the relay equipment for determining the TCI configuration of the downlink signal of the backhaul link, The situation before the TCI configuration of the downlink signal of the backhaul link, configured by the first configuration signaling, is activated, A method for determining the transmission configuration of a backhaul link, comprising the relay equipment determining the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, in at least one of the following situations: the situation after the activation time for the TCI configuration of the downlink signal of the backhaul link configured by the first configuration signaling has ended, based on the protocol specification and the candidate beamset.

2. The relay device acquires a candidate beamset that can be configured for the control link. The method according to claim 1, wherein the relay equipment determines the candidate beamset of the control link according to the priority of the protocol version on which the control link operates.

3. The relay equipment determines the candidate beamset of the control link according to the priority of the protocol version on which the control link operates, The method according to claim 2, wherein the relay device includes acquiring the candidate beamset of the control link, which is configured with upper-layer signaling information corresponding to the 17th published version of protocol Rel-17.

4. If the protocol specification or the first configuration signaling indicates that the downlink reference signal and / or downlink physical channel of the control link has a QCL relationship with the backhaul link, the TCI configuration of the downlink signal of the backhaul link is determined based on the downlink reference signal and / or downlink physical channel of the control link. Or, If the first configuration signaling includes target identification information, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration indicated by the target identification information, and the target identification information indicates one TCI configuration from a set of candidate TCI configurations for the control link. Or, The method according to claim 1, wherein, if the first configuration signaling includes a TCI configuration, the TCI configuration of the downlink signal of the backhaul link is the TCI configuration in the first configuration signaling.

5. If the protocol specification or the first configuration signaling indicates that a QCL relationship exists between the downlink reference signal of the control link and the backhaul link, the reference signal included in the TCI configuration of the downlink signal of the backhaul link is the downlink reference signal of the control link, and the QCL type is determined based on the protocol specification or the configuration of the network-side equipment. Or, The method according to claim 4, wherein, if the protocol specification or the first configuration signaling indicates that a QCL relationship exists between the downlink physical channel of the control link and the backhaul link, the TCI configuration of the downlink signal of the backhaul link is the same as or partially the same as the TCI configuration of the downlink physical channel of the control link.

6. The method according to claim 5, wherein the TCI configuration of the downlink signal of the backhaul link is partially the same as the TCI configuration of the downlink physical channel of the control link, wherein the reference signals included in the TCI configuration are the same, and the QCL type is indicated by the protocol specification or by a configuration message.

7. The aforementioned method, If there is an overlap between the transmission of the backhaul link and the control link within the target time, the relay equipment will The relay device either receives the downlink signal of the backhaul link using a target TCI configuration or transmits the uplink signal of the backhaul link using a target uplink transmission configuration. The relay device further includes performing one of the following: not performing downlink signal transfer of the backhaul link or not performing uplink signal transfer of the backhaul link within the target time. Here, the target TCI configuration is one of the TCI configurations in which the control link is used within the target time, and the target uplink transmission configuration is an uplink transmission configuration in which the control link is used within the target time. The method according to claim 1, wherein the target time includes at least one of the time units of transmission of the control link, a time units before transmission of the control link, and b time units after transmission of the control link, where a and b each represent integers greater than zero, and the time unit is one of orthogonal frequency division multiplexed symbols, slots, subframes, and wireless frames.

8. A method for determining the transmission configuration of a backhaul link, wherein the method is: The network-side equipment determines the configurable candidate beamsets for the control link, The network-side equipment transmits beam configuration signaling for the backhaul link to the relay equipment, wherein the beam configuration signaling is used to instruct the relay equipment to determine the transmission configuration instruction (TCI) configuration for the downlink signals of the backhaul link based on the configurable candidate beamsets of the control link. The network-side equipment includes determining the transmit beam and / or receive beam for the backhaul link's downlink signal and / or uplink signal based on the candidate beamset, based on the beam configuration signaling or protocol specification. The aforementioned candidate beamset is A beam corresponding to the candidate TCI configuration information of the control link, A beam corresponding to the downlink reference signal of the control link, The beam corresponding to the downlink physical channel of the control link, A beam corresponding to the uplink reference signal of the control link, This includes at least one of the following: the beam corresponding to the uplink physical channel of the control link, The relay equipment determines the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, The network-side equipment is in a situation where the relay equipment has not transmitted a first configuration signaling to the relay equipment for determining the TCI configuration of the downlink signal of the backhaul link, The situation before the TCI configuration of the downlink signal of the backhaul link, configured by the first configuration signaling, is activated, A method for determining the transmission configuration of a backhaul link, comprising the relay equipment determining the TCI configuration of the downlink signal of the backhaul link based on the candidate beamset, in at least one of the following situations: the situation after the activation time for the TCI configuration of the downlink signal of the backhaul link configured by the first configuration signaling has ended, based on the protocol specification and the candidate beamset.

9. The aforementioned method, The method according to claim 8, further comprising the network-side device transmitting a sixth configuration signaling to the relay device, wherein the sixth configuration signaling is used to instruct the relay device to update the TCI configuration of the downlink signals of the backhaul link.

10. A relay device comprising a processor and memory, wherein the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the steps of the method for determining the transmission configuration of a backhaul link described in any one of claims 1 to 7 are realized.

11. A network-side device comprising a processor and memory, wherein the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the step of the method for determining the transmission configuration of a backhaul link according to claim 8 or 9 is realized.

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