WO2024146306A1 - Beam failure detection method and apparatus of repeater - Google Patents

Abstract

The present application relates to the technical field of communications. Provided are a beam failure detection method and apparatus of a repeater, which method and apparatus are used for improving the accuracy and reliability of a repeater device performing beam failure detection. The method comprises: a repeater device determining a first reference signal resource set and a second reference signal resource set, wherein reference signal resources in the first reference signal resource set are used for beam failure detection performed regarding a forwarding functional entity, and reference signal resources in the second reference signal resource set are used for beam failure detection performed regarding a mobile-termination functional entity; according to a measurement result of the reference signal resources in the first reference signal resource set, determining whether beam failure occurs in the forwarding functional entity; and according to a measurement result of the reference signal resources in the second reference signal resource set, determining whether beam failure occurs in the mobile-termination functional entity.

Description

A method and device for detecting beam failure of a relay

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China on January 4, 2023, with application number 202310009240.7, and with the invention name “A method for recovering beam failure of a relay, terminal equipment, network equipment, relay equipment, and communication system”; the priority of the Chinese patent application filed with the State Intellectual Property Office of China on February 9, 2023, with application number 202310131230.0, and with the invention name “A method and device for detecting beam failure of a relay”; and the priority of the Chinese patent application filed with the State Intellectual Property Office of China on February 15, 2023, with application number 202310152376.3, and with the invention name “A method and device for detecting beam failure of a relay”. The entire contents of the above three applications are incorporated by reference into this application.

Technical Field

The present application relates to the field of communication technology, and in particular to a method and device for detecting beam failure of a relay.

Background technique

A radio frequency repeater is a device or apparatus with the function of amplifying and forwarding radio frequency signals, which can be used to improve the coverage of wireless networks. In the new radio (NR) of the fifth generation of mobile communications (5G), the relay and forwarding function can be realized through a network controlled repeater (NCR). Among them, NCR can include two functional entities, namely the mobile terminal (MT) functional entity and the forwarding (Fwd) functional entity. NCR-MT is used for the interaction of control information between NCR and network equipment through a control link (C-link), and NCR-Fwd is used for amplifying and forwarding uplink or downlink radio frequency signals between network equipment and user equipment.

In the high frequency band of the millimeter wave band, the path loss of the signal in space is relatively large. In order to overcome the large path loss, the transmitting device can use the beamforming method to send and concentrate the energy of the signal in a certain direction; the receiving device can also use the beamforming method to amplify the signal energy received in a certain direction. In order to ensure that the beam pair transmitted between the terminal device and the network device does not fail, the terminal device can perform beam failure detection. When it is determined that a beam failure occurs, the beam failure recovery process is executed to switch the transmit and receive beams.

Furthermore, in the scenario of using NCR for relay forwarding, there are also problems of beam failure and beam recovery, including beam failure of NCR-MT and beam failure of NCR-Fwd. However, the beams used by NCR-Fwd and NCR-MT may be different, and the requirements of the two functional entities for beam quality may also be different, so it is impossible to fully reuse the existing methods for beam failure detection and recovery on the terminal device side. Therefore, it is urgent to consider relay-based beam failure detection methods and beam failure recovery methods.

Summary of the invention

The present application provides a method and device for detecting beam failure of a relay, which are used to improve the accuracy and reliability of beam failure detection performed by a relay device and improve communication efficiency.

In a first aspect, a communication device is provided. The device includes a processor, the processor is coupled to a memory; the memory is used to store computer programs or instructions; the processor is used to execute the computer programs or instructions stored in the memory, so that the device is used to perform: determining a first reference signal resource set and a second reference signal resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of a forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of a mobile terminal function entity of the relay device; determining whether a beam failure occurs in the forwarding function entity of the relay device according to the measurement results of the reference signal resources in the first reference signal resource set; and determining whether a beam failure occurs in the mobile terminal function entity of the relay device according to the measurement results of the reference signal resources in the second reference signal resource set.

In the above implementation, the mobile terminal function entity and the forwarding function entity of the relay device respectively perform the relevant steps of beam failure detection, thereby improving the accuracy and reliability of beam failure detection of the relay device, thereby effectively improving communication efficiency.

In one embodiment, the above-mentioned device is specifically used to perform: determining whether a beam failure occurs in a forwarding function entity of the device according to a first measurement result set and a first threshold, wherein the first measurement result set includes a first measurement result, the first measurement result is a measurement result of a first reference signal resource, and the first reference signal resource is the first reference signal resource set A reference signal resource in .

Through the above-mentioned implementation method, the relay device can perform relevant steps of beam failure detection on the forwarding function entity according to the configured first threshold, so that the relay device can promptly detect the occurrence of beam failure on the forwarding function entity, which can improve the accuracy and reliability of beam failure detection by the relay device and effectively improve communication efficiency.

In one implementation, the device is used to perform: determining whether a beam failure occurs in a forwarding function entity of the device based on the first measurement result and the first threshold.

In one implementation, the first measurement result set further includes a second measurement result, where the second measurement result is a measurement result of a second reference signal resource, and the second reference signal resource is a reference signal resource in the first reference signal resource set.

In one embodiment, the first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource, and determining whether a beam failure occurs in the forwarding function entity of the relay device according to the first measurement result set and a first threshold specifically includes: the first threshold includes a first block error rate BLER threshold, and the relay device determines whether a beam failure occurs according to the BLER of the physical downlink control channel corresponding to the first measurement result and the first BLER threshold; or, the first threshold includes a first RSRP threshold and/or a second RSRP threshold, and the first measurement result is the RSRP on the first reference signal resource, wherein the first reference signal resource is a first SSB, and the relay device determines whether a beam failure occurs according to the RSRP on the first SSB and the first RSRP threshold, or, the first reference signal resource is a first CSI-RS, and the relay device determines whether a beam failure occurs according to the RSRP on the first CSI-RS and the second RSRP threshold.

Through the above-mentioned implementation mode, a first threshold for beam failure detection is configured for the forwarding function entity of the relay device, wherein the block error rate BLER can be used to reflect the reference signal quality, or the RSRP of the SSB or the RSRP of the CSI-RS in the first reference signal resource set can be used to reflect the reference signal quality, that is, the first threshold for beam failure detection for the forwarding function entity can be set as needed to improve the accuracy and reliability of beam failure detection.

In one embodiment, the first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource, and determining whether a beam failure occurs in the forwarding function entity of the relay device according to the first measurement result set and a first threshold value specifically includes: the first threshold value includes a first block error rate BLER threshold value, and the relay device determines whether a beam failure occurs according to the BLER of the physical downlink control channel corresponding to the second measurement result and the first BLER threshold value; or, the first threshold value includes a first RSRP threshold value and/or a second RSRP threshold value, and the second measurement result is the RSRP on the second reference signal resource, wherein the second reference signal resource is a second SSB, and the relay device determines whether a beam failure occurs according to the RSRP on the second SSB and the first RSRP threshold value, or, the second reference signal resource is a second CSI-RS, and the relay device determines whether a beam failure occurs according to the RSRP on the second CSI-RS and the second RSRP threshold value.

In one implementation, the first reference signal resource set and the second reference signal resource set are the same reference signal resource set.

In one embodiment, the apparatus is further used to execute: sending first indication information to a network device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the apparatus.

Through the above implementation, after the relay device detects that a beam failure occurs in the forwarding function entity, it can send indication information to the network device to indicate that a beam failure occurs in the forwarding function entity of the relay device, thereby enabling the communication network to avoid communication interruption caused by beam failure and improve communication efficiency.

In one embodiment, the above-mentioned device is also used to perform: receiving first configuration information from a network device, the first configuration information is used for beam failure detection of the device, and the first configuration information includes at least one of the following: configuration information of the first reference signal resource set, configuration information of the second reference signal resource set, a first threshold, a first BLER threshold, a first RSRP threshold or a second RSRP threshold.

Through the above-mentioned implementation mode, the relay device can receive the first configuration information from the network device, and obtain the reference signal resources and the corresponding signal quality threshold used for the forwarding function entity of the relay device to perform beam failure detection from the first configuration information, as well as the reference signal resources and the corresponding signal quality threshold used for the mobile terminal function entity of the relay device to perform beam failure detection, so as to respectively execute the relevant steps of beam failure detection, improve the accuracy and reliability of beam failure detection of the relay device, and thereby effectively improve communication efficiency.

In one embodiment, the device is also used to execute: determine a third reference signal resource set and a fourth reference signal resource set, wherein the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the device to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the device to determine the second target candidate beam reference signal resources.

Through the above-mentioned implementation, after the relay device determines that the beam has failed, it can perform beam failure recovery of the forwarding function entity or the beam failure recovery of the mobile terminal according to the configured third reference signal resource set and fourth reference signal resource set, that is, determine the first target candidate reference signal resource or determine the second target candidate beam reference signal resource, thereby avoiding long-term communication interruption caused by beam failure and improving communication efficiency.

In one embodiment, after determining that a beam failure occurs in the forwarding function entity of the device, the device is further used to execute: determining at least one first target candidate beam reference signal resource from the third reference signal resource set based on a second threshold, wherein the RSRP on each candidate reference signal resource in the at least one first target candidate beam reference signal resource is greater than or equal to the second threshold.

Through the above implementation, the relay device can determine the first target candidate beam reference signal resource that meets the signal quality condition from the third reference signal resource set through the configured second threshold, thereby realizing beam failure recovery of the forwarding function entity, avoiding long-term communication interruption on the forwarding link due to beam failure, and improving communication efficiency.

In one embodiment, the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource. When the at least one first target candidate beam reference signal resource includes a third SSB and the second threshold includes a third RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold; or, when the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and the second threshold includes a fourth RSRP threshold, the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold; or, when the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, and the second threshold includes a third RSRP threshold and a fourth RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold, and the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold.

In one embodiment, when it is determined that a beam failure occurs in the forwarding function entity of the device, the device is further used to execute: when it is determined that no link quality corresponding to a reference signal resource in a third reference signal resource set can meet the second threshold, the device shuts down the forwarding function entity.

Through the above implementation, the relay device can determine, through the configured second threshold, that there are no target candidate beam reference signal resources in the third reference signal resource set that meet the signal quality conditions, and thus can determine that the relay device can no longer provide other terminal devices with relay forwarding services that meet the quality requirements. Therefore, shutting down the forwarding function entity can avoid interference with the network and save energy consumption caused by the relay device.

In one embodiment, the third reference signal resource set includes at least one SSB and at least one CSI-RS resource. After determining that a beam failure occurs in the forwarding function entity of the device, when the RSRP measured on all SSBs in the third reference signal resource set is less than or equal to a third RSRP threshold and the RSRP measured on all CSI-RSs in the third reference signal resource set is less than or equal to a fourth RSRP threshold, the device shuts down the forwarding function entity.

In one embodiment, the third reference signal resource set includes at least one SSB. After determining that a beam failure occurs in the forwarding function entity of the device, when the RSRP measured on all SSBs in the third reference signal resource set is less than or equal to a third RSRP threshold, the device shuts down the forwarding function entity.

In one embodiment, the third reference signal resource set includes at least one CSI-RS resource. After determining that a beam failure occurs in a forwarding function entity of the device, when the RSRP measured on all CSI-RSs in the third reference signal resource set is less than or equal to a fourth RSRP threshold, the device shuts down the forwarding function entity.

In one embodiment, the apparatus is further used to execute: sending a second indication information to a network device, wherein the second indication information is further used to indicate at least one first target candidate beam reference signal resource, or the second indication information is used to indicate that there is no reference signal resource in a third reference signal resource set and the link quality corresponding to the resource can meet the second threshold.

Through the above implementation, after the relay device determines the candidate beam of the forwarding function entity, it can also send indication information to the network device to indicate that the candidate beam of the forwarding function entity is the first target candidate beam reference signal resource, thereby synchronizing the beam information of the uplink and downlink data between the relay device and the network device, thereby improving communication quality and communication efficiency.

In one implementation, the first indication information and/or the second indication information is carried in a medium access control control element MAC. In CE.

Through the above implementation, the first indication information and/or the second indication information can be carried in the MAC CE, wherein the first indication information can be carried in the same message and sent simultaneously with the second indication information, or can be carried in different messages and sent separately.

In one embodiment, the device is also used to perform: receiving second configuration information from a network device, the second configuration information is used for beam failure detection and/or beam failure recovery of the device, the second configuration information includes at least one of the following: configuration information of a third reference signal resource set, configuration information of a fourth reference signal resource set, a second threshold, a third RSRP threshold or a fourth RSRP threshold.

Through the above-mentioned implementation mode, the relay device can receive the second configuration information from the network device, and obtain the reference signal resources and the corresponding signal quality threshold for the forwarding function entity of the relay device to recover from a beam failure, as well as the reference signal resources and the corresponding signal quality threshold for the mobile terminal function entity of the relay device to recover from a beam failure from the second configuration information, so that the relevant steps of beam failure recovery can be executed respectively, thereby improving the efficiency of the relay device in recovering from a beam failure, and thereby effectively improving the communication quality and communication efficiency.

In a second aspect, a communication device is provided. The device includes a processor, the processor is coupled to a memory; the memory is used to store computer programs or instructions; the processor is used to execute the computer programs or instructions stored in the memory, so that the device is used to perform: determining first configuration information, the first configuration information is used for a relay device to perform beam failure detection, the first configuration information includes configuration information of a first reference signal resource set and configuration information of a second reference signal resource set; wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of a forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of a mobile terminal function entity of the relay device; and sending the first configuration information to the relay device.

In one embodiment, second configuration information is determined, the second configuration information including configuration information of a third reference signal resource set and configuration information of a fourth reference signal resource set; wherein the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine a first target candidate beam reference signal resource, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine a second target candidate beam reference signal resource; and the second configuration information is sent to the relay device.

In one implementation, the first reference signal resource set and the second reference signal resource set are the same reference signal resource set, and/or the third reference signal resource set and the fourth reference signal resource set are the same reference signal resource set.

In one embodiment, the first configuration information also includes a first threshold value, and the first threshold value is used by the relay device to determine whether a beam failure occurs in the forwarding function entity of the relay device based on the reference signal resources in the first reference signal resource set and the first threshold value.

In one implementation, the first threshold includes a first BLER threshold; or, the first threshold includes a first RSRP threshold and/or a second RSRP threshold.

In one implementation, the second configuration information further includes a second threshold, and the second threshold is used by the relay device to determine that at least one reference signal resource in the third reference signal resource set is a first target candidate beam reference signal resource.

In one embodiment, the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, and the second threshold includes a third RSRP threshold and/or a fourth RSRP threshold.

In one embodiment, the apparatus is further used to execute: receiving first indication information from the relay device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the relay device.

In one embodiment, the apparatus is further used to execute: receiving second indication information from the relay device, where the second indication information is further used to indicate at least one first target candidate beam reference signal resource.

In a third aspect, a beam failure detection method for a relay is provided, which is applied to a relay device. The relay device includes a mobile terminal function entity and a forwarding function entity, and the method includes: determining a first reference signal resource set and a second reference signal resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of the forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of the mobile terminal function entity of the relay device; determining whether a beam failure occurs in the forwarding function entity of the relay device according to the measurement result of the reference signal resources in the first reference signal resource set; and determining whether a beam failure occurs in the mobile terminal function entity of the relay device according to the measurement result of the reference signal resources in the second reference signal resource set.

In one embodiment, determining whether a beam failure occurs in a forwarding function entity of the relay device based on measurement results of reference signal resources in a first reference signal resource set specifically includes: determining whether a beam failure occurs in the forwarding function entity of the relay device based on the first measurement result set and a first threshold, wherein the first measurement result set includes a first measurement result, the first measurement result is a measurement result of a first reference signal resource, and the first reference signal resource is a reference signal resource in the first reference signal resource set.

In one embodiment, determining whether a beam failure occurs in a forwarding function entity of the relay device based on a first measurement result set and a first threshold specifically includes: determining whether a beam failure occurs in the forwarding function entity of the relay device based on the first measurement result and the first threshold.

In one implementation, the first measurement result set further includes a second measurement result, where the second measurement result is a measurement result of a second reference signal resource, and the second reference signal resource is a reference signal resource in the first reference signal resource set.

In one embodiment, the first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource, and determining whether a beam failure occurs in the forwarding function entity of the relay device according to the first measurement result set and a first threshold specifically includes: the first threshold includes a first block error rate BLER threshold, and the relay device determines whether a beam failure occurs according to the BLER of the physical downlink control channel corresponding to the first measurement result and the first BLER threshold; or, the first threshold includes a first RSRP threshold and/or a second RSRP threshold, and the first measurement result is the RSRP on the first reference signal resource, wherein the first reference signal resource is a first SSB, and the relay device determines whether a beam failure occurs according to the RSRP on the first SSB and the first RSRP threshold, or, the first reference signal resource is a first CSI-RS, and the relay device determines whether a beam failure occurs according to the RSRP on the first CSI-RS and the second RSRP threshold.

In one embodiment, the first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource, and determining whether a beam failure occurs in the forwarding function entity of the relay device according to the first measurement result set and a first threshold value specifically includes: the first threshold value includes a first block error rate BLER threshold value, and the relay device determines whether a beam failure occurs according to the BLER of the physical downlink control channel corresponding to the second measurement result and the first BLER threshold value; or, the first threshold value includes a first RSRP threshold value and/or a second RSRP threshold value, and the second measurement result is the RSRP on the second reference signal resource, wherein the second reference signal resource is a second SSB, and the relay device determines whether a beam failure occurs according to the RSRP on the second SSB and the first RSRP threshold value, or, the second reference signal resource is a second CSI-RS, and the relay device determines whether a beam failure occurs according to the RSRP on the second CSI-RS and the second RSRP threshold value.

In one implementation, the first reference signal resource set and the second reference signal resource set are the same reference signal resource set.

In one embodiment, the method further includes: sending first indication information to the network device, wherein the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the relay device.

In one embodiment, the method also includes: receiving first configuration information from a network device, the first configuration information is used for beam failure detection of the relay device, the first configuration information includes at least one of the following: configuration information of the first reference signal resource set, configuration information of the second reference signal resource set, a first threshold, a first BLER threshold, a first RSRP threshold or a second RSRP threshold.

In one embodiment, the method also includes: determining a third reference signal resource set and a fourth reference signal resource set, wherein the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine the second target candidate beam reference signal resources.

In one embodiment, after determining that a beam failure occurs in the forwarding function entity of the relay device, the method further includes: determining at least one first target candidate beam reference signal resource from the third reference signal resource set based on a second threshold, wherein the RSRP on each candidate reference signal resource in the at least one first target candidate beam reference signal resource is greater than or equal to the second threshold.

In one embodiment, the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, when the at least one first target candidate beam reference signal resource includes a third SSB, the second threshold includes a third RSRP threshold value, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold; or, when the at least one first target candidate beam reference signal resource includes a third CSI-RS resource, and the second threshold includes a fourth RSRP threshold, the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold; or, when the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, and the second threshold includes a third RSRP threshold and a fourth RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold, and the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold.

In one embodiment, after determining that a beam failure occurs in the forwarding function entity of the relay device, the method further includes: when determining that no link quality corresponding to a reference signal resource in a third reference signal resource set can meet the second threshold, shutting down the forwarding function entity of the relay device.

Through the above implementation, the relay device can determine, through the configured second threshold, that there are no target candidate beam reference signal resources in the third reference signal resource set that meet the signal quality conditions, and thus can determine that the relay device can no longer provide other terminal devices with relay forwarding services that meet the quality requirements. Therefore, shutting down the forwarding function entity can avoid interference with the network and save energy consumption caused by the relay device.

In one embodiment, the third reference signal resource set includes at least one SSB and at least one CSI-RS resource. After determining that a beam failure occurs in the forwarding function entity of the relay device, when the RSRP measured on all SSBs in the third reference signal resource set is less than or equal to a third RSRP threshold and the RSRP measured on all CSI-RSs in the third reference signal resource set is less than or equal to a fourth RSRP threshold, the forwarding function entity of the relay device is shut down.

In one embodiment, the third reference signal resource set includes at least one SSB. After determining that a beam failure occurs in the forwarding function entity of the relay device, when the RSRP measured on all SSBs in the third reference signal resource set is less than or equal to a third RSRP threshold, the forwarding function entity of the relay device is shut down.

In one embodiment, the third reference signal resource set includes at least one CSI-RS resource, and after determining that a beam failure occurs in the forwarding function entity of the relay device, when the RSRP measured on all CSI-RS in the third reference signal resource set is less than or equal to a fourth RSRP threshold, the forwarding function entity of the relay device is shut down. In one embodiment, the method further includes: sending a second indication information to the network device, the second indication information is also used to indicate at least one first target candidate beam reference signal resource, or the second indication information is used to indicate that there is no reference signal resource in the third reference signal resource set corresponding to a link quality that meets the second threshold.

In one embodiment, the first indication information and/or the second indication information are carried in a medium access control control element MAC CE.

In one embodiment, the method also includes: receiving second configuration information from a network device, the second configuration information is used for beam failure detection and/or beam failure recovery of the relay device, the second configuration information includes at least one of the following: configuration information of a third reference signal resource set, configuration information of a fourth reference signal resource set, a second threshold, a third RSRP threshold or a fourth RSRP threshold.

In a fourth aspect, a beam failure detection method for a relay is provided, which is applied to a network device. The method includes: determining first configuration information, the first configuration information is used for the relay device to perform beam failure detection, the first configuration information includes configuration information of a first reference signal resource set and configuration information of a second reference signal resource set; wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of a forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of a mobile terminal function entity of the relay device; and sending the first configuration information to the relay device.

In one embodiment, the method also includes: determining second configuration information, the second configuration information including configuration information of a third reference signal resource set and configuration information of a fourth reference signal resource set; wherein the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine a first target candidate beam reference signal resource, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine a second target candidate beam reference signal resource; and sending the second configuration information to the relay device.

In one implementation, the first reference signal resource set and the second reference signal resource set are the same reference signal resource set, and/or the third reference signal resource set and the fourth reference signal resource set are the same reference signal resource set.

In one embodiment, the first configuration information further includes a first threshold value, and the first threshold value is used by the relay device to determine the forwarding function entity of the relay device according to the reference signal resources in the first reference signal resource set and the first threshold value. Whether beam failure occurs.

In one implementation, the first threshold includes a first BLER threshold; or, the first threshold includes a first RSRP threshold and/or a second RSRP threshold.

In one implementation, the first configuration information further includes a second threshold, where the second threshold is used by the relay device to determine that at least one reference signal resource in the third reference signal resource set is a first target candidate beam reference signal resource.

In one embodiment, the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, and the second threshold includes a third RSRP threshold and/or a fourth RSRP threshold.

In one embodiment, the method further includes: receiving first indication information from the relay device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the relay device.

In one embodiment, the method further includes: receiving second indication information from the relay device, wherein the second indication information is further used to indicate at least one first target candidate beam reference signal resource.

In one embodiment, the first indication information and/or the second indication information are carried in a media access control control element MAC CE.

In a fifth aspect, a communication device is provided. The device includes a processor, the processor is coupled to a memory; the memory is used to store computer programs or instructions; the processor is used to execute the computer programs or instructions stored in the memory, so that the device is used to perform: determining a second reference signal resource set and a fourth reference signal resource set, wherein the reference signal resources in the second reference signal resource set are used for beam failure detection of the device, and the reference signal resources in the fourth reference signal resource set are used to determine target candidate beam reference signal resources after beam failure of the device, and the relay device determines whether a beam failure occurs in a mobile terminal function entity of the device according to the measurement results of the reference signal resources in the second reference signal resource set, and when it is determined that a beam failure occurs in the mobile terminal function entity of the device, the target candidate beam reference signal resources for the device are determined from the fourth reference signal resource set, and the target candidate beam reference signal resources include: The device comprises a third reference signal resource, wherein the third reference signal resource is associated with a first random access channel RACH occasion (RACH occasion, RO) and/or a preamble sequence, the mobile terminal function entity of the device sends a random access request to the network device on the first RACH resource, and after the device sends the random access request for a first duration, when forwarding downlink, the forwarding function entity of the device uses a first receiving beam to receive a signal on a backhaul link; and/or, when forwarding uplink, the forwarding function entity of the device uses a first transmitting beam to transmit a signal on a backhaul link; wherein the first receiving beam is determined according to a receiving beam received by the mobile terminal function entity of the device for receiving the third reference signal resource, the first transmitting beam is determined according to a transmitting beam sent by the mobile terminal function entity of the device for sending the random access request, and the first duration is preset or configured by the network device.

In the above implementation mode, when the relay device determines that a beam failure occurs in a mobile terminal functional entity, the beam recovery speed after the beam failure on the forwarding functional entity can be accelerated so that the forwarding functional entity can implement beam switching after the first period of time after initiating a random access request. This can effectively shorten the beam interruption duration of the forwarding functional entity and improve the communication quality and efficiency of the relay device forwarding uplink and downlink data.

In a sixth aspect, a beam failure detection method for a relay is provided, which is applied to a relay device. The relay device includes a mobile terminal function entity and a forwarding function entity, and the method includes: determining a second reference signal resource set and a fourth reference signal resource set, wherein the reference signal resources in the second reference signal resource set are used for beam failure detection of the relay device, and the reference signal resources in the fourth reference signal resource set are used to determine target candidate beam reference signal resources after beam failure of the relay device, and the relay device determines whether a beam failure occurs in the mobile terminal function entity of the relay device according to the measurement result of the reference signal resources in the second reference signal resource set, and when it is determined that a beam failure occurs in the mobile terminal function entity of the relay device, the relay device determines the target candidate beam reference signal resource for the relay device from the fourth reference signal resource set, and the target candidate beam reference signal resource includes a third reference signal resource, and the third reference signal resource is consistent with the first random access channel RACH opportunity (RACH occasion, RO) and/or a preamble sequence association, the mobile terminal function entity of the relay device sends a random access request to the network device on a first RACH resource, and after the relay device sends the random access request for a first duration, when downlink forwarding, the forwarding function entity of the relay device uses a first receiving beam to receive a signal on a backhaul link; and/or, when uplink forwarding, the forwarding function entity of the relay device uses a first transmitting beam to send a signal on a backhaul link; wherein, the first receiving beam is determined according to the receiving beam of the mobile terminal function entity of the relay device receiving the third reference signal resource, the first transmitting beam is determined according to the transmitting beam of the mobile terminal function entity of the relay device sending the random access request, and the first duration is preset, or configured by the network device.

In a seventh aspect, a communication device is provided. The device includes a processor, the processor is coupled to a memory; the memory is used to store computer programs or instructions; the processor is used to execute the computer programs or instructions stored in the memory, so that the device is used to perform: determining a first reference signal resource set and a first forwarding resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of the device, the first forwarding resource set includes at least one periodic forwarding resource, and when the device determines that a beam failure occurs, the forwarding function entity of the device starts to perform downlink forwarding on the at least one periodic forwarding resource.

In the above implementation, when the relay device determines that a beam failure has occurred, the terminal device may also detect the beam failure. By performing additional reference signal forwarding through the relay device, the terminal device can simultaneously perform candidate beam measurements while the relay device is performing candidate beam measurements, thereby advancing the process of the terminal device performing candidate beam measurements, thereby speeding up the beam recovery process and improving communication efficiency.

In one embodiment, the device is used to perform: determining the first forwarding resource set based on a third reference signal resource set, wherein at least one periodic forwarding resource in the first forwarding resource set corresponds one-to-one to a time domain resource where at least one periodic reference signal resource in the third reference signal resource set is located; wherein the reference signal resources in the third reference signal resource set are used to determine the target candidate beam reference signal resources after the beam of the device fails, and the third reference signal resource set includes at least one periodic reference signal resource.

In one implementation, the apparatus is configured to execute: receiving first configuration information from a network device, which is used to indicate the first reference signal resource set and the third reference signal resource set.

In one embodiment, the device is used to perform: determine the first forwarding resource set based on a third reference signal resource set, wherein the reference signal resources in the third reference signal resource set are used to determine the target candidate beam reference signal resources after the beam of the device fails, the third reference signal resource set includes at least one periodic reference signal resource, each periodic reference signal resource in the at least one periodic reference signal resource is associated with M periodic forwarding resources, M is a positive integer, and the first forwarding resource set includes the periodic forwarding resources associated with each periodic reference signal resource in the at least one periodic reference signal resource.

In one embodiment, each forwarding resource in the first forwarding resource is associated with an access link beam. When the forwarding function entity of the device starts to perform downlink forwarding on the at least one periodic forwarding resource, it performs downlink forwarding on the access link using the access link beam associated with the forwarding resource on each periodic forwarding resource.

That is to say, when it is determined that a beam failure has occurred on the relay device and the mobile terminal functional entity is measuring the reference signal in the third reference signal resource set, the forwarding functional entity simultaneously forwards the reference signal. The receiving beam used on the backhaul link during forwarding is the same as the receiving beam used by the mobile terminal functional entity on the control link. The transmitting beam used on the access link during forwarding can be determined based on the access link beam associated with the reference signal resource.

Through the above implementation, the network device can configure the time domain position of the candidate beam reference signal resource set configured for the terminal device and the time domain position of the above first forwarding resource set to the same time domain configuration. When the relay device detects a beam failure, the terminal device may also detect a beam failure, so both the terminal device and the relay device will perform candidate beam detection. Through this configuration method, the relay device can additionally forward the reference signal when performing candidate beam measurement, so that the terminal device can also perform candidate beam measurement at the same time, thereby speeding up the recovery of the terminal device beam failure.

In one embodiment, the first forwarding resources include at least one group of forwarding resources, and in each group of forwarding resources in the at least one group of forwarding resources, different forwarding resources are associated with different access link beams.

In one implementation, the third reference signal resource set includes at least one group of reference signal resources, and the group of reference signal resources is associated with the group of forwarding resources.

In one implementation, a group of forwarding resources in the at least one group of forwarding resources corresponds to M periodic forwarding resources associated with one periodic reference signal resource in the at least one periodic reference signal resource.

In an eighth aspect, a beam failure detection method for a relay is provided, which is applied to a relay device. The relay device includes a mobile terminal function entity and a forwarding function entity, and the method includes: determining a first reference signal resource set and a first forwarding resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of the relay device, and the first forwarding resource set includes at least one periodic forwarding resource, and when the relay device determines that a beam failure occurs, the forwarding function entity of the relay device starts to perform downlink forwarding on the at least one periodic forwarding resource.

In one implementation, determining the first forwarding resource set specifically includes: determining, according to the third reference signal resource set The first forwarding resource set is determined, and at least one periodic forwarding resource in the first forwarding resource set corresponds one-to-one to the time domain resources where at least one periodic reference signal resource in the third reference signal resource set is located; wherein the reference signal resources in the third reference signal resource set are used to determine the target candidate beam reference signal resources after the relay device beam fails, and the third reference signal resource set includes at least one periodic reference signal resource.

In one embodiment, the method further includes: the relay device receiving first configuration information from a network device, which is used to indicate the first reference signal resource set and the third reference signal resource set.

In one embodiment, determining the first forwarding resource set specifically includes: determining the first forwarding resource set based on a third reference signal resource set, wherein the reference signal resources in the third reference signal resource set are used to determine the target candidate beam reference signal resources after the relay device beam fails, the third reference signal resource set includes at least one periodic reference signal resource, each periodic reference signal resource in the at least one periodic reference signal resource is associated with M periodic forwarding resources, M is a positive integer, and the first forwarding resource set includes the periodic forwarding resources associated with each periodic reference signal resource in the at least one periodic reference signal resource.

In one embodiment, each forwarding resource in the first forwarding resource is associated with an access link beam. When the forwarding function entity of the relay device starts to perform downlink forwarding on the at least one periodic forwarding resource, on each periodic forwarding resource, the access link beam associated with the forwarding resource is used to perform downlink forwarding on the access link.

In one embodiment, the first forwarding resources include at least one group of forwarding resources, and in each group of forwarding resources in the at least one group of forwarding resources, different forwarding resources are associated with different access link beams.

In one implementation, the third reference signal resource set includes at least one group of reference signal resources, and the group of reference signal resources is associated with the group of forwarding resources.

In one implementation, a group of forwarding resources in the at least one group of forwarding resources corresponds to M periodic forwarding resources associated with one periodic reference signal resource in the at least one periodic reference signal resource.

In a ninth aspect, a communication device is provided, wherein the communication device is used to execute the method described in any one of the third aspects.

In a tenth aspect, a communication device is provided, wherein the communication device is used to execute any method described in the fourth aspect.

In an eleventh aspect, a communication device is provided, wherein the communication device is used to execute the method described in any one of the sixth aspects.

In aspect 12, a communication device is provided, wherein the communication device is used to execute the method described in any one of aspect 8.

In a thirteenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called by the computer, the computer is used to cause the computer to execute any one of the methods described in the third aspect.

In a fourteenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called by the computer, the computer is used to cause the computer to execute any one of the methods described in the fourth aspect.

In a fifteenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called by the computer, the computer is used to enable the computer to execute any one of the methods described in the sixth aspect.

In the sixteenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called by the computer, the computer is used to enable the computer to execute any one of the methods in the eighth aspect.

In a seventeenth aspect, a computer program product comprising instructions is provided, and when the computer program product is run on a computer, the computer performs the method as described in any one of the above third aspects.

In an eighteenth aspect, a computer program product comprising instructions is provided, and when the computer program product is run on a computer, the computer performs the method as described in any one of the above-mentioned fourth aspects.

In a nineteenth aspect, a computer program product comprising instructions is provided, and when the computer program product is run on a computer, the computer performs the method as described in any one of the sixth aspects above.

In the twentieth aspect, a computer program product comprising instructions is provided, and when the computer program product is run on a computer, the computer performs the method as described in any one of the above-mentioned eighth aspects.

In the twenty-first aspect, a chip is provided, wherein the chip is coupled to a memory and is used to read and execute program instructions stored in the memory to implement a method as described in any one of the third aspects above.

In the twenty-second aspect, a chip is provided, which is coupled to a memory and is used to read and execute program instructions stored in the memory to implement a method as described in any one of the fourth aspects above.

In the twenty-third aspect, a chip is provided, which is coupled to a memory and is used to read and execute program instructions stored in the memory to implement a method as described in any one of the sixth aspects above.

In the twenty-fourth aspect, a chip is provided, wherein the chip is coupled to a memory and is used to read and execute program instructions stored in the memory to implement a method as described in any one of the above-mentioned eighth aspects.

In the twenty-fifth aspect, a communication system is provided, comprising a communication device as described in any one of the first aspect above, and a communication device as described in any one of the second aspect above.

It can be understood that any of the above-mentioned relay beam failure detection methods, communication devices, communication systems, computer program products, computer-readable storage media or chips, etc. can be implemented by the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the first aspect, the fifth aspect or the seventh aspect, etc. above, and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an architecture diagram of a communication system provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

FIG3 is a schematic diagram of a flow chart of a relay beam failure detection method provided in an embodiment of the present application;

FIG4 is a schematic diagram of a signaling structure provided in an embodiment of the present application;

FIG5 is a schematic flow chart of another relay beam failure detection method provided in an embodiment of the present application;

FIG6 is a schematic flow chart of another relay beam failure detection method provided in an embodiment of the present application;

FIG7 is a schematic diagram of a flow chart of another relay beam failure detection method provided in an embodiment of the present application;

FIG8 is a schematic diagram of a beam configuration of a relay provided in an embodiment of the present application;

FIG. 9 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application.

Detailed ways

In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

In addition, in this application, greater than or equal to a certain value can also be replaced by greater than the value, and less than or equal to a certain value can also be replaced by less than the value; conversely, greater than a certain value can also be replaced by greater than or equal to the value, and less than a certain value can also be replaced by less than or equal to the value. In other words, whether equal to a certain value is considered to satisfy the condition can be flexibly set and adjusted as needed, and this application does not make specific restrictions on this.

Furthermore, the "pre-configuration" in the embodiments of the present application may refer to a configuration performed in advance for a device before executing a certain process, and may also be understood as a standard predefined configuration.

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

First, the implementation environment and application scenarios of the embodiments of the present application are briefly introduced.

The present application can be applied to 5G or NR communication systems, and can also be used in any other wireless communication systems with similar structures and functions. As shown in FIG1 , the communication system at least includes a terminal device 101 , a network device 102 , and a relay device 103 .

The terminal device 101 involved in the embodiment of the present application may be a user equipment (UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with a wireless communication function. For example, the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function. The terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, or a terminal device in industrial control. Wireless terminals, wireless terminals in unmanned driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in smart cities, wireless terminals in smart homes, etc.

In the embodiment of the present application, the device for realizing the function of the terminal may be a terminal; or it may be a device capable of supporting the terminal to realize the function, such as a chip system, which may be installed in the terminal. In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, the technical solution provided in the embodiment of the present application is described by taking the device for realizing the function of the terminal device as a UE as an example.

The network device 102 involved in the embodiment of the present application may include a base station (BS), which may be a device deployed in a wireless access network that can communicate wirelessly with a terminal.

Among them, the base station may have various forms, such as a macro base station, a micro base station or an access point, etc. Exemplarily, the base station involved in the embodiment of the present application may be a base station in 5G or a base station in LTE, wherein the base station in 5G may also be called a transmission reception point (TRP) or the next generation NodeB (gNB).

In an embodiment of the present application, the device for implementing the function of the network device may be a network device; or it may be a device that can support the network device to implement the function, such as a chip system, which may be installed in the network device.

In the technical solution provided in the embodiments of the present application, the apparatus for realizing the functions of the network device is a network device, and the network device is a base station as an example to describe the technical solution provided in the embodiments of the present application.

The relay device 103 involved in the embodiment of the present application may be a device or apparatus with radio frequency signal amplification and forwarding functions, such as a network controlled repeater (NCR) or a smart repeater (SR), which is used to improve the coverage of the wireless network and improve the signal quality between the network device 102 and the terminal device 101.

Among them, the relay device 103 can have the ability to receive network device control information, and the network device 102 can send control information to configure the switch state, beam direction, power control, uplink and downlink time slot configuration or working bandwidth of the relay device 103.

Exemplarily, as shown in FIG1 , a schematic diagram of the structure of an NCR is shown. The NCR may include two functional entities, a mobile terminal (MT) functional entity and a forwarding (Fwd) functional entity.

Among them, NCR-MT is used for the interaction of control information (such as control information for controlling NCR-Fwd) between NCR and network equipment through a control link (control link, C-link). The C-link can be implemented based on the Uu interface between an ordinary UE and a gNB. NCR-Fwd is used to amplify and forward uplink or downlink radio frequency signals between network equipment and UE. NCR-Fwd can also be called a radio unit (Radio Unit, RU) functional entity. Specifically, the link between NCR-Fwd and gNB is a backhaul link (Backhaul link, BH-link), and the link between NCR-Fwd and UE is an access link (Access link).

Exemplarily, in the downlink forwarding mode, the NCR-Fwd can receive the downlink signal of the network device 102 through the donor antenna, and then after filtering, amplification and other operations, finally forward the amplified signal to the terminal device 101 through the service antenna. Among them, the donor antenna can also be called a forward antenna, and the service antenna can also be called a backward antenna, a retransmission antenna or a coverage antenna. In the uplink forwarding mode, the NCR-Fwd can receive the uplink signal from the terminal device 101 through the service antenna, and then after filtering, amplification and other operations, finally forward the amplified signal to the network device 102 through the donor antenna.

In the downlink forwarding mode, the channel between the donor antenna and the service antenna can also be called the downlink forwarding channel; in the uplink forwarding mode, the channel between the service antenna and the donor antenna can also be called the uplink forwarding channel. Optionally, the uplink forwarding channel and the downlink forwarding channel can also include a mixer. Taking the uplink forwarding channel as an example, the NCR-Fwd can first down-convert the high-frequency signal to an intermediate frequency (or baseband) through a mixer, filter the intermediate frequency (or baseband), and then up-convert the signal to a high frequency through a mixer before forwarding it. Optionally, the uplink forwarding channel and the downlink forwarding channel also include a power amplifier, such as a low-noise amplifier (LNA).

In an embodiment of the present application, the device for implementing the function of the relay device may be a relay device; or it may be a device that can support the relay device to implement the function, such as a chip system, which may be installed in the relay device.

In the technical solution provided in the embodiment of the present application, the apparatus for realizing the function of the relay device is a relay device, and the relay device is an NCR as an example to describe the technical solution provided in the embodiment of the present application.

The technical solution provided in the embodiment of the present application can be applied to wireless communication between network devices, relay devices and terminal devices. In the embodiment of the present application, the term "wireless communication" can also be referred to as "communication", and the term "communication" can also be described as "data transmission", "information transmission" or "transmission".

It should be noted that FIG1 is only an exemplary framework diagram, and the number of network element nodes included in FIG1 is not limited. In addition to the functional nodes, other nodes may also be included, such as core network equipment, gateway equipment, application servers, etc., without limitation. The access network equipment communicates with the core network equipment through a wired network or a wireless network, such as through a next generation (NG) interface.

In a specific implementation, each network element shown in FIG1, such as a terminal device, a relay device or a network device, may adopt the composition structure shown in FIG2 or include the components shown in FIG2. FIG2 is a schematic diagram of the structure of a communication device 200 provided in an embodiment of the present application. When the communication device 200 has the function of the relay device described in the embodiment of the present application, the communication device 200 may be a relay device or a chip or system on chip in the relay device. When the communication device 200 has the function of the network device described in the embodiment of the present application, the communication device 200 may be a network device or a chip or system on chip in the network device.

As shown in FIG2 , the communication device 200 may include a processor 201, a communication line 202, and a communication interface 203. Further, the communication device 200 may also include a memory 204. The processor 201, the memory 204, and the communication interface 203 may be connected via the communication line 202.

The processor 201 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device, or any combination thereof. The processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules.

The communication line 202 is used to transmit information between the components included in the communication device 200.

The communication interface 203 is used to communicate with other devices or other communication networks. The other communication networks can be Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc. The communication interface 203 can be an interface circuit, a pin, a radio frequency module, a transceiver or any device capable of achieving communication.

The memory 204 is used to store instructions, where the instructions may be computer programs.

Among them, the memory 204 can be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and/or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, optical disc storage, magnetic disk storage media or other magnetic storage devices, and the optical disc storage includes a compressed optical disc, a laser disc, an optical disc, a digital versatile disc, or a Blu-ray disc, etc.

It should be noted that the memory 204 can exist independently of the processor 201, or can be integrated with the processor 201. The memory 204 can be used to store instructions or program codes or some data, etc. The memory 204 can be located in the communication device 200, or can be located outside the communication device 200, without limitation. The processor 201 is used to execute the instructions stored in the memory 204 to implement the method provided in the following embodiments of the present application.

In an example, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .

As an optional implementation, the communication device 200 includes multiple processors. For example, in addition to the processor 201 in FIG. 2 , it may also include a processor 207 .

As an optional implementation, the communication device 200 further includes an output device 205 and an input device 206. Exemplarily, the input device 206 is a keyboard, a mouse, a microphone, a joystick, and the output device 205 is a display screen, a speaker, and the like.

It should be noted that the communication device 200 may be a wearable device, a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure as shown in FIG2. In addition, the composition structure shown in FIG2 does not constitute a limitation on the communication device. In addition to the components shown in FIG2, the communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

Next, the method of beam failure detection and beam failure recovery involved in the embodiments of the present application is described.

In the high frequency band of the millimeter wave band, the path loss of the signal in space is relatively large. In order to overcome the large path loss, the transmitting device can use the beamforming method to send and concentrate the energy of the signal in a certain direction; the receiving device can also use the beamforming method to amplify the signal energy received in a certain direction. When the transmission beam direction of the transmitting device matches the receiving beam direction of the receiving device and the transmission path corresponding to the channel, the receiving device can receive a signal with higher power/energy, or equivalently, the signal received by the receiving device has a larger signal-to-noise ratio (SNR) or Signal to interference and noise ratio (SINR).

Among them, beamforming can be achieved by setting different phase values (such as phase shifters) or amplitude values for different antennas under a multi-antenna architecture, which can be understood as some kind of filtering of the signal in space. Therefore, the beam can also be generally referred to as a spatial (domain) parameter, a spatial (domain) filter, or a spatial (domain) filter parameter. The corresponding transmission beam can be referred to as a spatial (domain) transmission parameter, a spatial (domain) transmission filter, or a spatial (domain) transmission filter parameter. The corresponding reception beam can be referred to as a spatial (domain) reception parameter, a spatial (domain) reception filter, or a spatial (domain) reception filter parameter. Usually, the transmission beam of a transmitting device can correspond to the reception beam of a receiving device, forming a beam pair link (Beam pair link, BPL) or a beam pair. That is, when the transmitting device uses different transmission beams, the receiving device can also use corresponding different reception beams.

Exemplarily, in the downlink scenario of the 5G system, the type D quasi-colocation (QCL) of the antenna port can be used to indicate the information of the UE receiving beam of the relevant downlink signal or downlink channel, wherein when two signals or two channels, or a signal and a channel have a type D quasi-colocation relationship, it can be considered that the UE can use the same or similar receiving beam to receive the two signals or two channels, or can use the same or similar receiving beam to receive the one signal and one channel. For example, in the cell selection process, the UE can measure multiple SSBs of the gNB (usually for different SSBs, the gNB will use different transmit beams). For one of the SSBs, the UE can use different receiving beams for measurement to determine the receiving beam corresponding to the SSB. After the UE and the gNB establish a connection, the gNB can indicate that a non-zero-power channel state information reference signal (NZP-CSI-RS) has a type D quasi-co-location relationship with the SSB, so that the UE can determine that when receiving the NZP-CSI-RS, the same or similar beam as that used to receive the SSB can be used. Further, the QCL relationship can be indicated by a transmission configuration indicator (TCI) state, and a TCI state can usually include an indication of a source reference signal and an indication of a QCL relationship type. For example, when configuring an NZP-CSI-RS, a TCI state can be configured, and the TCI state can indicate that the NZP-CSI-RS has a QCL relationship with an SSB, and its QCL relationship can be a type D QCL relationship.

In the uplink scenario of the 5G system, the information indication of the UE transmission beam of the uplink signal or uplink channel can be performed through spatial relationship or spatial filter. For example, when the gNB configures the sounding reference signal (SRS), it can configure the SRS to have a spatial correlation relationship with a certain SSB, so that the UE can use the same or similar beam when sending the SRS as when receiving the SSB. For another example, when the gNB configures the SRS, it can configure the SRS to have a spatial correlation relationship with another SRS, so that when the UE sends the SRS, it can use the same or similar beam when sending the other SRS.

Therefore, the above description can also be understood as follows: in the 5G system, beam information can be indicated by reference signals or reference signal resources (such as SSB, CSI-RS or SRS), that is, a reference signal or reference signal resource can be associated with a beam. At the same time, in this application, unless otherwise specified, reference signals and reference signal resources can refer to each other.

In the implementation scenario where there is no NCR for relay forwarding between the network device and the UE, several available beam pairs can be determined between the UE and the network device after completing the initial beam training, and the UE and the network device can use these beam pairs to transmit data or control information. In order to ensure that the beam pairs transmitted between the UE and the network device do not fail, the UE can perform beam failure detection, and when it is determined that a beam failure occurs, the beam failure recovery process is executed to switch the transmit and receive beams.

Specifically, the UE may perform beam failure detection and beam failure recovery including the following steps:

1) The network device configures a reference signal resource set for beam failure detection for the UE, and the reference signal resource set includes several periodic reference signal resources. The reference signal resources in the reference signal resource set can correspond to several available beam pairs determined after beam training. In addition, the network device configures a candidate reference signal resource set for the UE. The reference signal resources in the candidate reference signal resource set are used to re-scan the beam when the UE detects beam failure, so as to determine a new beam. Each reference signal resource in the candidate reference signal resource set can be associated with a random access channel (random Access channel Occasion, RACH) opportunity (RACH Occasion, RO) and/or a preamble sequence/preamble code for random access; the network device configures a dedicated search space (searchspace, SS) for the UE, and the SS is associated with a control resource set (control resource set, CORESET). When beam failure occurs, the UE can detect control signals on the SS.

2) When the UE detects that the link quality of all reference signal resources in the reference signal resource set used for beam failure detection is lower than a preset threshold, it reports the beam failure to the Media Access Control (MAC) layer. Beam failure instance (BFI): when the number of BFIs occurring within a period of time reaches or exceeds a certain threshold, the UE determines that a beam failure event has occurred, or determines that a beam failure has been detected.

3) When the UE detects a beam failure, the UE can measure the reference signal resources in the candidate reference signal resource set. For example, these reference signal resources can correspond to different transmitting beams of the network device. The UE can use different receiving beams to measure the reference signal resources in the candidate reference signal resource set. When the corresponding link quality of one of the reference signal resources is higher than a preset threshold, it is considered that the reference signal resource corresponds to a new available beam, or a new available beam pair, and the reference signal is recorded as qnew.

4) The UE initiates random access to the network device on the RO corresponding to qnew and/or using the corresponding preamble sequence/preamble code. For example, the UE can use the transmit beam corresponding to the receive beam that receives qnew to send a random access request to the network device on the RO. Since the network device knows the correspondence between the candidate reference signal configured for the UE and the RO, when the network device receives the random access request initiated by the UE on the RO, it can be determined that the UE has a beam failure, and can determine the new available beam pair between the network device and the UE, that is, the beam pair corresponding to qnew.

5) After initiating random access, the UE can detect the physical downlink control channel (PDCCH) on the dedicated SS, expecting to receive a response from the gNB to the random access initiated by the UE. At this time, for the UE to detect PDCCH on the dedicated SS and receive its associated physical downlink control channel (PDSCH), the UE will assume that it has the same antenna port QCL parameters as the receiving qnew, that is, the UE can use the receiving beam of the receiving qnew to detect PDCCH and receive its associated PDSCH on the dedicated SS.

6) After the UE detects the PDCCH on the dedicated SS, the UE can further receive the random access response message scheduled by the PDCCH. And 28 symbols after the UE receives the PDCCH, for detecting the PDCCH on CORESET0, the UE will assume that it has the same antenna port QCL parameters as the receiving qnew, that is, the UE can use the receiving beam of receiving qnew to detect the PDCCH on the CORESET0. At the same time, 28 symbols after receiving the PDCCH, the UE can also use the transmitting beam that sent the random access request in step 4) when sending PUCCH.

7) The network device can use the same beam as that used to send qnew on CORESET0 to send PDCCH to the UE and schedule the corresponding PDSCH. The PDSCH contains the update information of the new beam, thereby completing the beam failure recovery process.

Further, in combination with what is shown in FIG1 , in the implementation scenario where NCR is used for relay forwarding between the network device and the UE, signals can be sent and received between the network device and the NCR through beams. For example, the control link between the network device and the NCR-MT can exchange control signaling through appropriate transceiver beams, the backhaul link between the network device and the NCR-Fwd can forward uplink and downlink signals through appropriate transceiver beams, and the access link between the NCR-Fwd and the UE can forward uplink and downlink signals through appropriate transceiver beams.

Similarly, in the above scenario of using NCR for relay forwarding, beam failure may also occur, including beam failure of NCR-MT and beam failure of NCR-Fwd. Therefore, it is necessary to consider beam failure detection methods and beam failure recovery methods based on relay equipment.

Among them, NCR-Fwd and NCR-MT can share antennas or use adjacent antennas, so the beam used for signal forwarding or signal reception between NCR-Fwd and network devices can refer to the beam used for control information exchange between NCR-MT and network devices. For example, NCR-MT and network devices can refer to the beam training between UE and network devices to determine several available beam pairs, and then NCR-Fwd and network devices can also use these beam pairs. When multiple beam pairs are available between NCR and network devices, and NCR-Fwd and NCR-MT are simultaneously receiving downlink or transmitting uplink, NCR-MT can determine a transmit or receive beam with reference to the existing UE method, and the backhaul link of NCR-Fwd can use the same transmit or receive beam as NCR-MT.

When only NCR-Fwd is performing uplink transmission or downlink reception, NCR-Fwd needs to determine the available beams of the backhaul link. Specifically, the transmit and receive beams can be determined by the following method.

Method 1: According to the predefined rules, NCR-Fwd can determine the receiving beam on the CORESET with the smallest ID of NCR-MT (for example, CORESET0) as the receiving beam on the NCR-Fwd backhaul link, or it can determine the transmitting beam on PUCCH0 of NCR-MT as the transmitting beam on the NCR-Fwd backhaul link.

Method 2: The network device may use dedicated signaling to indicate the beam on the backhaul link of the NCR-Fwd. For example, the NCR-Fwd may be instructed to use the updated beam on the backhaul link.

However, due to the limited amplification efficiency of NCR and the path loss between UE and NCR, the UE served by NCR receives The signal quality received from the network device is worse than the signal quality of the network device received by NCR-MT. Therefore, NCR-MT may be able to decode the signal sent by the network device, but the UE cannot decode the signal of the network device forwarded by NCR. In this case, NCR-MT will not detect the beam failure, but when NCR-Fwd uses the same beam to forward the signal of the network device on the backhaul link, the UE cannot successfully decode it, which may cause the UE's service to be interrupted, and the UE cannot report the interruption event, and NCR cannot detect the interruption event.

In addition, during the above-mentioned beam failure recovery process, NCR-MT will update the beams on CORESET0 and PUCCH0 only after 28 symbols after detecting DCI, which will cause NCR-Fwd to be interrupted for a long time, affecting the communication quality of NCR forwarding uplink and downlink data. Similarly, in the above-mentioned method 2, the network device can indicate the new beam of NCR-Fwd to NCR only after the link between it and NCR-MT is fully restored, which will also cause NCR-Fwd to be interrupted for a long time, affecting the communication quality of NCR forwarding uplink and downlink data.

In order to solve the above problems, an embodiment of the present application provides a beam failure detection method for a relay, in which the mobile terminal function entity and the forwarding function entity of the relay device respectively perform the relevant steps of beam failure detection, thereby improving the accuracy and reliability of beam failure detection of the relay device, thereby effectively improving communication efficiency.

As shown in FIG. 3 , the method may include the following steps.

S301: A relay device determines a first reference signal resource set and a second reference signal resource set.

Among them, the reference signal resources in the first reference signal resource set can be used for beam failure detection of the forwarding (NCR-Fwd) functional entity of the relay device, and the reference signal resources in the second reference signal resource set can be used for beam failure detection of the mobile terminal (NCR-MT) functional entity of the relay device.

In one embodiment, the first reference signal resource set and the second reference signal resource set may be the same reference signal resource set, that is, the same reference signal resource set (i.e., corresponding to the same beam set) may be used to perform beam failure detection on NCR-Fwd and NCR-MT. When the first reference signal resource set and the second reference signal resource set are always the same reference signal resource set, the relay device may determine the first reference signal resource set by determining the second reference signal resource set, or the relay device may determine the second reference signal resource set by determining the first reference signal resource set. Alternatively, the first reference signal resource set and the second reference signal resource set may be different reference signal resource sets, that is, different reference signal resource sets (i.e., corresponding to different beam sets) may be used to perform beam failure detection on NCR-Fwd and NCR-MT.

Furthermore, the reference signal resources used by the relay device for beam failure detection may be pre-configured; or, they may be configured by the network device, that is, before step S301, the network device may send configuration information indicating the first reference signal resource set and the second reference signal resource set to the relay device.

In one embodiment, the method may further include the following steps.

S300: The network device sends first configuration information to the relay device.

The first configuration information may be used to indicate the first reference signal resource set and the second reference signal resource set. In other words, the first configuration information may include configuration information of the first reference signal resource set and configuration information of the second reference signal resource set.

Optionally, when the first configuration information only includes relevant information of the first reference signal resource set, the relay device may determine that the second reference signal resource set is the same reference signal resource set as the first reference signal resource set; or, when the first configuration information only includes relevant information of the second reference signal resource set, the relay device may determine that the first reference signal resource set is the same reference signal resource set as the second reference signal resource set.

Optionally, when the first configuration information does not include relevant information of the first reference signal resource set and the second reference signal resource set or the relay device has not received the first configuration information, the relay device can determine that the second reference signal resource set includes: at least one of the reference signals corresponding to the TCI state configured on the current CORESET of the NCR-MT, and the first reference signal resource set is the same reference signal resource set as the second reference signal resource set.

Optionally, when the first configuration information does not include relevant information of the first reference signal resource set or the relay device does not receive the first configuration information, the relay device may determine that the first reference signal resource set includes: at least one of the reference signals corresponding to the TCI state configured on the current CORESET of the NCR-MT, or determine that the first reference signal resource set includes a reference signal corresponding to at least one beam used by the NCR-Fwd on the backhaul link. The beam used by the NCR-Fwd on the backhaul link may be indicated by the network device through other configuration information.

Optionally, when the first reference signal resource set and the second reference signal resource set are always the same reference signal resource set, the first configuration information may also include only one reference signal resource set for beam failure detection.

In one implementation, the reference signal resources in the first reference signal resource set may be resources of a channel state information reference signal (CSI-RS) or resources of a synchronization signal physical broadcast channel block (SSB). Similarly, the reference signal resources in the second reference signal resource set may be resources of a CSI-RS or resources of an SSB.

S302: The relay device determines whether a beam failure occurs in the forwarding function entity according to the measurement result of the reference signal resources in the first reference signal resource set.

Specifically, the relay device can receive and measure all or part of the reference signals in the first reference signal resource set, and compare the reception and measurement results with the (pre) configured NCR-Fwd beam failure threshold, thereby evaluating the link (or beam) quality of NCR-Fwd.

Exemplarily, the relay device may receive and measure only some reference signals in the first reference signal resource set that have a QCL relationship with the demodulation reference signal (DeModulation Reference Signal, DMRS) of the PDCCH that the NCR-MT needs to detect. For another example, the relay device may only receive and measure the reference signal resources associated with the beam that the NCR-Fwd may use in the first reference signal resource set, where the beam that the NCR-Fwd may use may be indicated by the network device through other configuration information. At this time, the first reference signal resource set should be understood as a set consisting of reference signal resources that the relay device needs to detect.

Among them, if the relay device determines that the link quality is worse than the link quality corresponding to the (pre) configured NCR-Fwd beam failure threshold based on the measurement results of the relevant reference signal resources in the first reference signal resource set, it can be determined that an NCR-Fwd BFI has occurred; when the cumulative number of NCR-Fwd BFIs occurring within a certain period of time reaches or exceeds a certain number, the relay device determines that an NCR-Fwd beam failure has occurred.

In one implementation, if the beam failure threshold of NCR-Fwd includes a first threshold, the measurement result obtained by the relay device receiving and measuring the reference signal in the first reference signal resource set includes a first measurement result set. Wherein, the first measurement result set includes at least the first measurement result, then step S302 may include: the relay device determines whether a beam failure occurs in the NCR-Fwd functional entity according to the first measurement result set and the first threshold. Specifically, the relay device may determine whether a beam failure occurs in the NCR-Fwd functional entity according to comparing the first measurement result with the first threshold.

The first reference signal resource set includes the first reference signal resource, the first measurement result may be a measurement result of the relay device receiving and measuring the first reference signal resource, and the first measurement result set includes the first measurement result.

Optionally, the first reference signal resource set may also include a second reference signal resource, and the first measurement result set may also include a second measurement result, where the second measurement result is a measurement result of the relay device receiving and measuring the second reference signal resource. Then step S302 may include: the relay device compares the first measurement result with the first threshold value, and compares the second measurement result with the first threshold value, to determine whether a beam failure occurs in the forwarding function entity of the relay device. By analogy, when the link quality determined by the measurement results in the first measurement result set is worse than the link quality corresponding to the (pre) configured first threshold value, it can be determined that an NCR-Fwd BFI occurs; when the number of NCR-Fwd BFIs within a certain period of time reaches or exceeds a certain number, the relay device determines that an NCR-Fwd beam failure occurs.

In one embodiment, the first threshold may be a reference signal received power (RSRP) threshold, or the first threshold may be an expected PDCCH block error rate (BLER) threshold, or the first threshold may be a signal-to-noise ratio (SNR) threshold, or a signal-to-interference and noise ratio (SINR) threshold.

Wherein, if the first threshold is the expected PDCCH block error rate (BLER) threshold, the relay device can determine, estimate or evaluate the BLER of the first PDCCH based on the first measurement result, and then compare it with the first BLER threshold to determine whether a beam failure occurs, wherein the configuration of the first PDCCH and related transmission parameters can be configured or pre-configured by the network device. For example, NCR-Fwd can estimate the BLER of the first PDCCH by measuring the RSRP or SINR of the first SSB or the first CSI-RS. When the BLER is greater than or equal to the first BLER threshold, it is considered that the link quality corresponding to the first SSB or the first CSI-RS is worse than the link quality corresponding to the (pre) configured NCR-Fwd beam failure threshold. When the BLERs corresponding to all reference signal resources in the first reference signal resource set are less than the first BLER, it is considered that a BFI has occurred.

In addition, in the case where the first threshold is an RSRP threshold, if the first reference signal resource set includes at least one SSB, the first threshold may include a first RSRP threshold for determining a beam failure associated with the SSB; if the first reference signal resource set includes at least one CSI-RS, the first threshold may include a second RSRP threshold for determining a beam failure associated with the CSI-RS. The relay device may determine whether a beam failure occurs based on the RSRP detected on at least one SSB and at least one CSI-RS in the first reference signal set, as well as the first RSRP threshold and the second RSRP threshold.

Exemplarily, when the first reference signal resource is the first SSB, the relay device may compare the RSRP on the first SSB with the first RSRP threshold, and when the RSRP is less than or equal to the first RSRP threshold, it is considered that the link quality corresponding to the first SSB is worse than the link quality corresponding to the (pre) configured NCR-Fwd beam failure threshold. When the first reference signal resource is the first CSI-RS, the relay device may compare the RSRP on the first CSI-RS with the second RSRP threshold, and when the RSRP is less than or equal to the second RSRP threshold, it is considered that the link quality corresponding to the first CSI-RS is worse than the link quality corresponding to the (pre) configured NCR-Fwd beam failure threshold. When the RSRP on all SSBs in the first reference signal resource set is less than the first RSRP threshold and the RSRP on all CSI-RS in the first reference signal resource set is less than the second RSRP threshold, it is considered that a BFI has occurred.

It should be noted that the first RSRP threshold and the second RSRP threshold configured for the relay device may be the same or different, and this application does not make any specific limitation on this.

In addition, for the case where the first threshold is an SNR threshold, if the first reference signal resource set includes at least one SSB, the first threshold may include a first SNR threshold for determining a beam failure associated with the SSB; if the first reference signal resource set includes at least one CSI-RS, the first threshold may include a second SNR threshold for determining a beam failure associated with the CSI-RS. The relay device may determine whether a beam failure occurs based on the SNR measured on at least one SSB and at least one CSI-RS in the first reference signal set, as well as the first SNR threshold and the second SNR threshold. For specific methods, reference may be made to the above method for determining whether a beam failure occurs based on the RSRP detected on at least one SSB and at least one CSI-RS in the first reference signal set, as well as the first RSRP threshold and the second RSRP threshold.

It should be noted that the first SNR threshold and the second SNR threshold configured for the relay device may be the same or different, and this application does not make any specific limitation on this.

In addition, for the case where the first threshold is an SINR threshold, if the first reference signal resource set includes at least one SSB, the first threshold may include a first SINR threshold for determining a beam failure associated with the SSB; if the first reference signal resource set includes at least one CSI-RS, the first threshold may include a second SINR threshold for determining a beam failure associated with the CSI-RS. The relay device may determine whether a beam failure occurs based on the SINR measured on at least one SSB and at least one CSI-RS in the first reference signal set, as well as the first SINR threshold and the second SINR threshold. For specific methods, reference may be made to the above method for determining whether a beam failure occurs based on the RSRP detected on at least one SSB and at least one CSI-RS in the first reference signal set, as well as the first RSRP threshold and the second RSRP threshold.

It should be noted that the first SINR threshold and the second SINR threshold configured for the relay device may be the same or different, and this application does not make any specific limitation on this.

In one embodiment, the relay device may set a first counter and a first timer, and the initial value of the first counter may be set to 0. When the relay device determines that an NCR-Fwd BFI occurs, the value of the first counter is increased by one, and the first timer is started or restarted. Among them, the timing value of the first timer after the relay device is started or restarted may be a preset value or configured by the first configuration information. Before the first timer expires (i.e., before the countdown reaches 0), if the value of the first counter reaches or exceeds the preset number, the relay device can determine that a beam failure event has occurred in NCR-Fwd; otherwise, the first counter is cleared, that is, the relay device believes that no beam failure event has occurred within a certain period of time.

Optionally, when the relay device determines that a beam failure occurs in the forwarding function entity, the relay device may shut down the forwarding function entity of the relay device.

Optionally, the relay device may determine whether an NCR-Fwd BFI occurs in the beam corresponding to each reference signal resource based on the measurement results of the relevant reference signal resources in the first reference signal resource set, by determining whether the link quality corresponding to each reference signal resource is worse than the (pre) configured NCR-Fwd beam failure threshold (such as the first threshold); when the cumulative number of NCR-Fwd BFIs corresponding to a certain reference signal resource within a certain period of time reaches or exceeds a certain number, the relay device determines that an NCR-Fwd beam failure occurs in the beam direction. Specifically, when the link quality corresponding to the measurement result corresponding to a reference signal resource in the first reference signal resource set is worse than the first threshold, it is determined that an NCR-Fwd BFI occurs in the beam direction corresponding to the reference signal resource. BFI, for specific comparison between the measurement result on the reference signal resource and the first threshold, please refer to the above description, which will not be repeated here.

Optionally, the relay device may maintain a counter and a timer for each reference signal resource that needs to be received and measured in the first reference signal resource set. For each reference signal resource, the initial value of the corresponding counter may be 0. When the link quality determined based on the reference signal resource is worse than the first threshold value mentioned above, it can be determined that an NCR-Fwd BFI occurs on the reference signal resource. When the counter corresponding to the reference signal resource accumulates a certain number of occurrences within a certain period of time, it is determined that an NCR-Fwd beam failure occurs in the beam direction corresponding to the reference signal resource. For specific methods, please refer to the relevant descriptions of the first counter and the first timer mentioned above, which will not be repeated here.

Optionally, when the relay device determines that NCR-Fwd beam failure occurs on a beam corresponding to a reference signal resource, the relay device may stop forwarding in the direction of the beam.

It should be noted that the first threshold value may be a default configuration or preconfiguration of the relay device, or may be configured for the relay device by the network device through specific signaling or configuration information, for example, a specific field in the first configuration information may be used to indicate the first threshold value. This application does not make specific limitations on this.

In one implementation, if the relay device executes S302 and determines that a beam failure occurs in NCR-Fwd, NCR-Fwd beam failure recovery is performed to determine a first target candidate beam reference signal resource that meets the conditions from a third reference signal resource set.

In one embodiment, the reference signal resources for determining the candidate beams may also be configured for the mobile terminal function entity and the forwarding function entity of the relay device, respectively. For example, the third reference signal resource set and the fourth reference signal resource set may be configured for the relay device. Thus, the relay device can perform beam recovery by determining the third reference signal resource set and the fourth reference signal resource set. Among them, the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine the reference signal resources of the first target candidate beam, that is, used for scanning and determining the candidate beam after the NCR-Fwd beam failure occurs. The reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine the reference signal resources of the second target candidate beam, that is, used for scanning and determining the candidate beam after the NCR-MT beam failure occurs.

Based on the above implementation, in one possible implementation, the third reference signal resource set and the fourth reference signal resource set may be the same reference signal resource set. That is, the same reference signal resource set (i.e., corresponding to the same beam set) may be used to scan and determine the candidate beams for NCR-Fwd and NCR-MT. When the third reference signal resource set and the fourth reference signal resource set are always the same reference signal resource set, the relay device may determine the fourth reference signal resource set by determining the third reference signal resource set. Alternatively, the relay device may determine the third reference signal resource set by determining the fourth reference signal resource set. Alternatively, the third reference signal resource set and the fourth reference signal resource set may be different reference signal resource sets, that is, different reference signal resource sets (i.e., corresponding to different beam sets) may be used to scan and determine the candidate beams for NCR-Fwd and NCR-MT. Wherein, the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource.

Furthermore, the reference signal resources for the relay device to recover from beam failure may be pre-configured; or, they may be configured by a network device, that is, before the above steps, the network device may send configuration information, such as the second configuration information, to the relay device to indicate a third reference signal resource set and a fourth reference signal resource set.

In one implementation, the second configuration information may be used to indicate the third reference signal resource set and the fourth reference signal resource set. In other words, the second configuration information may include configuration information of the third reference signal resource set and configuration information of the fourth reference signal resource set.

Optionally, when the second configuration information only includes relevant information of the third reference signal resource set, the relay device may determine that the fourth reference signal resource set is the same reference signal resource set as the third reference signal resource set; or, when the second configuration information only includes relevant information of the fourth reference signal resource set, the relay device may determine that the third reference signal resource set is the same reference signal resource set as the fourth reference signal resource set.

Optionally, when the third reference signal resource set and the fourth reference signal resource set are always the same reference signal resource set, the second configuration information may also include only one reference signal resource set for beam failure recovery.

In one embodiment, the second configuration information can be carried in the same signaling as the first configuration information. For example, the network device sends a first message to the relay device, and the first message includes the first configuration information and the second configuration information, which are used to indicate the reference signal resources for NCR-Fwd to perform beam failure detection, the reference signal resources for NCR-Fwd to determine candidate beams, the reference signal resources for NCR-MT to perform beam failure detection, and the reference signal resources for NCR-MT to determine candidate beams, etc.

In another embodiment, each item of information in the first configuration information and/or the second configuration information may also be carried in different configuration information. For example, the network device configures the first reference signal resource set through the first configuration information #A and configures the second reference signal resource set through the first configuration information #B. The embodiment of the present application does not impose any limitation on the form and implementation method of the first configuration information and/or the second configuration information.

The relay device may determine at least one first target candidate beam reference signal resource from the third reference signal resource set according to the second threshold. The second threshold may be a beam recovery threshold of NCR-Fwd, and the signal quality measured on each candidate reference signal resource in the at least one first target candidate beam reference signal resource is greater than or equal to the signal quality corresponding to the second threshold. For example, the second threshold may include a second BLER threshold, and the BLER of the first PDCCH corresponding to each first target candidate reference signal resource in the at least one first target candidate beam reference signal resource is less than or equal to the second BLER threshold.

In one embodiment, the at least one first target candidate beam reference signal resource includes a third SSB, the second threshold includes a third RSRP threshold, and the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold.

Alternatively, the at least one first target candidate beam reference signal resource includes a third CSI-RS resource, the second threshold includes a fourth RSRP threshold, and the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold.

Alternatively, the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, the second threshold includes a third RSRP threshold and a fourth RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold, and the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold.

In one embodiment, the second threshold may also be an SNR threshold. The at least one first target candidate beam reference signal resource includes a third SSB, the second threshold includes a third SNR threshold, and the SNR measured on the third SSB is greater than or equal to the third SNR threshold.

Alternatively, the at least one first target candidate beam reference signal resource includes a third CSI-RS resource, the second threshold includes a fourth SNR threshold, and the SNR measured on the third CSI-RS resource is greater than or equal to the fourth SNR threshold.

Alternatively, the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, the second threshold includes a third SNR threshold and a fourth SNR threshold, the SNR measured on the third SSB is greater than or equal to the third SNR threshold, and the SNR measured on the third CSI-RS resource is greater than or equal to the fourth SNR threshold.

In one embodiment, the second threshold may also be an SINR threshold. The at least one first target candidate beam reference signal resource includes a third SSB, the second threshold includes a third SINR threshold, and the SNR measured on the third SSB is greater than or equal to the third SINR threshold.

Alternatively, the at least one first target candidate beam reference signal resource includes a third CSI-RS resource, the second threshold includes a fourth SINR threshold, and the SINR measured on the third CSI-RS resource is greater than or equal to the fourth SINR threshold.

Alternatively, the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, the second threshold includes a third SINR threshold and a fourth SINR threshold, the SINR measured on the third SSB is greater than or equal to the third SINR threshold, and the SINR measured on the third CSI-RS resource is greater than or equal to the fourth SINR threshold.

In one implementation, after beam failure occurs in NCR-Fwd, when it is determined that no link quality corresponding to a reference signal resource in a third reference signal resource set can meet the second threshold, the forwarding function entity of the relay device is shut down.

Through the above implementation, the relay device can determine, through the configured second threshold, that there are no target candidate beam reference signal resources in the third reference signal resource set that meet the signal quality conditions, and thus can determine that the relay device can no longer provide other terminal devices with relay forwarding services that meet the quality requirements. Therefore, shutting down the forwarding function entity can avoid interference with the network and save energy consumption caused by the relay device.

In one embodiment, the third reference signal resource set includes at least one SSB and at least one CSI-RS resource. After determining that a beam failure occurs in the forwarding function entity of the relay device, when the RSRP measured on all SSBs in the third reference signal resource set is less than or equal to a third RSRP threshold and the RSRP measured on all CSI-RSs in the third reference signal resource set is less than or equal to a fourth RSRP threshold, the forwarding function entity of the relay device is shut down.

In one embodiment, the third reference signal resource set includes at least one SSB. After determining that a beam failure occurs in the forwarding function entity of the relay device, when the RSRP measured on all SSBs in the third reference signal resource set is less than or equal to a third RSRP threshold, the forwarding function entity of the relay device is shut down.

In one implementation, the third reference signal resource set includes at least one CSI-RS resource. After determining that a beam failure occurs in the forwarding function entity of the relay device, when the measured beams on all CSI-RS in the third reference signal resource set are When the RSRPs are all less than or equal to a fourth RSRP threshold, the forwarding function entity of the relay device is shut down.

It should be noted that the third RSRP threshold and the fourth RSRP threshold configured for the relay device may be the same or different, the third SNR threshold and the fourth SNR threshold may be the same or different, the third SINR threshold and the fourth SINR threshold may be the same or different, and this application does not make any specific limitations on this.

In addition, the second threshold value may be a default configuration or preconfiguration of the relay device, or may be configured for the relay device by the network device through specific signaling or configuration information, for example, a specific field in the second configuration information may be used to indicate the second threshold value. This application does not make specific limitations on this.

In one embodiment, the first threshold value may be the same as the second threshold value, that is, one/a set of threshold values may be configured for the relay device, such as configuring the first threshold value, and the relay device may determine the second threshold value based on the first threshold value. For example, the first threshold value includes a first BLER threshold value, and the second BLER threshold value included in the second threshold value is equal to the first BLER threshold value; the first threshold value includes a first RSRP threshold value and/or a second RSRP threshold value, and the third RSRP threshold value included in the second threshold value is equal to the first RSRP threshold value, and/or the fourth RSRP threshold value is equal to the second RSRP threshold value; the first threshold value includes a first SNR threshold value and/or a second SNR threshold value, and the third SNR threshold value included in the second threshold value is equal to the first SNR threshold value, and/or the fourth SNR threshold value is equal to the second SNR threshold value; the first threshold value includes a first SINR threshold value and/or a second SINR threshold value, and the third SINR threshold value included in the second threshold value is equal to the first SINR threshold value, and/or the fourth SINR threshold value is equal to the second SINR threshold value.

S303: The relay device determines whether a beam failure occurs in the mobile terminal function entity according to the measurement result of the reference signal resources in the second reference signal resource set.

Similar to the aforementioned step S302, the relay device can receive and measure all or part of the reference signals in the second reference signal resource set, and compare the reception and measurement results with the (pre) configured NCR-MT beam failure threshold (such as the third threshold) to determine whether the NCR-MT has a beam failure.

Exemplarily, the relay device may receive and measure only part of the reference signal resources in the second reference signal resource set that have a QCL relationship with the DMRS of the PDCCH that the NCR-MT needs to detect.

In one embodiment, if the relay device determines that the link quality is worse than the link quality corresponding to the (pre) configured NCR-MT beam failure threshold (such as the third threshold) based on the measurement results of the relevant reference signal resources in the second reference signal resource set, it can be determined that an NCR-MT BFI has occurred; when the cumulative number of NCR-MT BFIs occurring within a certain period of time reaches or exceeds a certain number, the relay device determines that an NCR-MT beam failure has occurred.

In one embodiment, the beam failure threshold of the NCR-MT, i.e., the third threshold may include a third BLER threshold. The relay device may obtain the BLER of the corresponding PDCCH by measuring the RSRP or SINR detected on at least one SSB and/or CSI-RS in the second reference signal resource set, and compare the BLER with the third BLER threshold.

In another embodiment, the beam failure threshold of the NCR-MT, that is, the third threshold, may include a fifth RSRP threshold for determining beam failure associated with the SSB. The relay device may compare the RSRP detected on at least one SSB in the second reference signal set with the fifth RSRP threshold.

In another embodiment, the beam failure threshold of the NCR-MT, i.e., the third threshold, may include a sixth RSRP threshold for determining beam failure associated with the CSI-RS. The relay device may compare the RSRP detected on at least one CSI-RS in the second reference signal set with the sixth RSRP threshold.

It should be noted that the fifth RSRP threshold and the sixth RSRP threshold configured for the relay device may be the same or different, and this application does not make any specific limitation on this.

In one implementation, the relay device may set a second counter and a second timer, and the initial value of the second counter may be set to 0. When the relay device determines that an NCR-MT BFI occurs according to the third threshold, the value of the second counter is increased by one, and the second timer is started or restarted. Among them, the timing value of the second timer after the relay device is started or restarted can be configured by the first configuration information. Before the second timer expires (i.e., before the countdown reaches 0), if the value of the second counter reaches or exceeds the preset number, the relay device can determine that a beam failure event has occurred in the NCR-MT; otherwise, the second counter is cleared, that is, the relay device believes that no NCR-MT beam failure event has occurred within a certain period of time. For specific implementation methods, please refer to the relevant description of S302 above, which will not be repeated here.

It should be noted that the third threshold value may be a default configuration or pre-configuration of the relay device, or may be configured for the relay device by the network device through specific signaling or configuration information, for example, a specific field in the first configuration information may be used to indicate the first threshold value. This application does not make specific limitations on this.

In one embodiment, in the above steps S302 and S303, the signal quality corresponding to the threshold value (such as the first threshold value) of the NCR-Fwd beam failure may be higher than the signal quality corresponding to the threshold value (such as the third threshold value) of the NCR-MT beam failure, that is, the beam failure detection of NCR-Fwd is more sensitive than the beam failure detection of NCR-MT. Exemplarily, when the signal quality is reflected by the BLER threshold of the expected PDCCH, the above third BLER threshold may be greater than the first BLER threshold. For another example, when the signal quality is reflected by the RSRP threshold, the above fifth RSRP threshold may be less than the first RSRP threshold, or the sixth RSRP threshold may be less than the second RSRP threshold, or the fifth RSRP threshold is less than the first RSRP threshold and the sixth RSRP threshold is less than the second RSRP threshold. The beam failure detection threshold configured by the above method can make the beam failure detection of NCR-Fwd more sensitive than the beam failure detection of NCR-MT, so that NCR-Fwd may detect beam failure events that are not detected by NCR-MT, thereby improving the efficiency and accuracy of beam failure detection of relay equipment and avoiding the problem of service interruption caused by UE failure to decode.

In one embodiment, the first threshold value may also be determined by the first difference and the third threshold value. For example, when the first threshold value is the first BLER threshold value and the third threshold value is the third BLER threshold value, the first difference value may be the first BLER difference value, and the first BLER threshold value may be determined to be equal to the third BLER threshold value minus the first BLER difference value. For another example, when the first threshold value includes the first RSRP threshold value and/or the second RSRP threshold value and the third threshold value includes the fifth RSRP threshold value and/or the sixth RSRP threshold value, the first difference value may include the first SSB RSRP difference value and/or the first CSI-RS RSRP difference value, and the first RSRP threshold value may be determined to be equal to the fifth RSRP threshold value plus the first SSB RSRP difference value, and/or the second RSRP threshold value may be determined to be equal to the sixth RSRP threshold value plus the first CSI-RS RSRP difference value. In this embodiment, the third threshold value may be determined by the network device configuration or pre-configuration, and the first difference value may also be determined by the network device configuration or pre-configuration, and then the first threshold value is further determined based on the above relationship. For example, the first configuration information includes the third threshold value and the first difference value, and then the relay device determines the first threshold value according to the above relationship.

In one implementation, if the relay device executes S303 and determines that a beam failure occurs in the NCR-MT, it executes NCR-MT beam failure recovery and determines a second target candidate beam reference signal resource that meets the conditions from the configured fourth reference signal resource set.

The relay device may determine at least one second target candidate beam reference signal resource from the fourth reference signal resource set according to the fourth threshold. The fourth threshold may be a beam recovery threshold of the NCR-MT, and the signal quality measured on each candidate reference signal resource in the at least one second target candidate beam reference signal resource is greater than or equal to the signal quality corresponding to the fourth threshold. For example, the fourth threshold may include a fourth BLER threshold, and the BLER of the PDCCH corresponding to each second target candidate reference signal resource in the at least one second target candidate beam reference signal resource is less than or equal to the fourth BLER threshold.

In one embodiment, the at least one second target candidate beam reference signal resource includes a fourth SSB, the fourth threshold includes a seventh RSRP threshold, and the RSRP measured on the fourth SSB is greater than or equal to the seventh RSRP threshold.

Alternatively, the at least one second target candidate beam reference signal resource includes a fourth CSI-RS resource, the fourth threshold includes an eighth RSRP threshold, and the RSRP measured on the fourth CSI-RS resource is greater than or equal to the eighth RSRP threshold.

Alternatively, the at least one second target candidate beam reference signal resource includes a fourth CSI-RS resource and a fourth SSB, the fourth threshold includes a seventh RSRP threshold and an eighth RSRP threshold, the RSRP measured on the fourth SSB is greater than or equal to the seventh RSRP threshold, and the RSRP measured on the fourth CSI-RS resource is greater than or equal to the eighth RSRP threshold.

In one implementation, after a beam failure occurs in the NCR-MT, when it is determined that no link quality corresponding to a reference signal resource in the fourth reference signal resource set can meet the fourth threshold, the forwarding function entity of the relay device is shut down.

In one embodiment, the fourth reference signal resource set includes at least one SSB and at least one CSI-RS resource. After determining that a beam failure occurs in the mobile terminal function entity of the relay device, when the RSRP measured on all SSBs in the fourth reference signal resource set is less than or equal to the seventh RSRP threshold and the RSRP measured on all CSI-RSs in the fourth reference signal resource set is less than or equal to the eighth RSRP threshold, the forwarding function entity of the relay device is shut down.

In one embodiment, the fourth reference signal resource set includes at least one SSB. After determining that a beam failure occurs in the mobile terminal function entity of the relay device, when the RSRP measured on all SSBs in the fourth reference signal resource set is less than or equal to a seventh RSRP threshold, the forwarding function entity of the relay device is shut down.

In one embodiment, the fourth reference signal resource set includes at least one CSI-RS resource. After determining that a beam failure occurs in the mobile terminal function entity of the relay device, when the RSRP measured on all CSI-RSs in the fourth reference signal resource set is less than or equal to an eighth RSRP threshold, the forwarding function entity of the relay device is shut down.

It should be noted that the seventh RSRP threshold and the eighth RSRP threshold configured for the relay device may be the same or may be the same. Different, this application does not make specific limitations on this.

Exemplarily, when the signal quality is reflected by the BLER threshold of the expected PDCCH, the fourth BLER threshold mentioned above may be greater than the second BLER threshold. For another example, when the signal quality is reflected by the RSRP threshold, the seventh RSRP threshold mentioned above may be less than the third RSRP threshold, or the eighth RSRP threshold may be less than the fourth RSRP threshold, or the seventh RSRP threshold is less than the third RSRP threshold and the eighth RSRP threshold is less than the fourth RSRP threshold. The beam failure recovery threshold configured by the above method can make the beam quality determined by the beam failure recovery of NCR-Fwd higher than the beam quality determined by the beam failure recovery of NCR-MT, thereby improving the efficiency and accuracy of the beam failure recovery of the relay device and avoiding the problem of service interruption caused by the UE's inability to decode.

In one embodiment, the second threshold value may also be determined by the second difference and the fourth threshold value. For example, when the second threshold value is the second BLER threshold value and the fourth threshold value is the fourth BLER threshold value, the second difference value may be the second BLER difference value, and the second BLER threshold value may be determined to be equal to the fourth BLER threshold value minus the second BLER difference value. For another example, when the second threshold value includes the third RSRP threshold value and/or the fourth RSRP threshold value, and the fourth threshold value includes the seventh RSRP threshold value and/or the eighth RSRP threshold value, the second difference value may include the second SSB RSRP difference value and/or the second CSI-RS RSRP difference value, and the third RSRP threshold value may be determined to be equal to the third RSRP threshold value plus the second SSB RSRP difference value, and/or the fourth RSRP threshold value may be determined to be equal to the eighth RSRP threshold value plus the second CSI-RS RSRP difference value. In this embodiment, the fourth threshold value may be determined by the network device configuration or pre-configuration, and the second difference value may also be determined by the network device configuration or pre-configuration, and then the second threshold value may be further determined based on the above relationship. For example, the second configuration information includes the fourth threshold value and the second difference value, and then the relay device determines the second threshold value according to the above relationship.

Exemplarily, the fourth reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, and each reference signal resource in the fourth reference signal resource set can be associated with one or more RACH resources. For example, each reference signal resource in the fourth reference signal resource set can be associated with a random access channel preamble sequence (RACH preamble) index and/or one or more random access channel opportunity (RACH occasion, RO) indexes.

In one embodiment, if the NCR-MT beam failure occurs in the main cell or special cell (such as the cell to which the UE initially accesses), the relay device determines a second target candidate reference signal qnew from the fourth reference signal resource set according to the fourth threshold, and then initiates random access on the RO associated with qnew. After initiating random access, the UE can monitor the PDCCH on the dedicated SS, expecting to receive a response from the gNB to the random access initiated by the NCR-MT. At this time, for detecting PDCCH and receiving its associated PDSCH on the dedicated SS, the NCR-MT will assume the same antenna port QCL parameters as the receiving qnew, that is, the NCR-MT can use the receiving beam of the receiving qnew to detect PDCCH and receive its associated PDSCH on the dedicated SS. After the NCR-MT detects the PDCCH on the dedicated SS, the NCR-MT can further receive a random access response message scheduled by the PDCCH. And after a period of time (for example, 28 symbols) after receiving the PDCCH, for detecting PDCCH on CORESET0, NCR-MT will assume that it has the same antenna port QCL parameters as receiving qnew, that is, NCR-MT can use the receiving beam of receiving qnew to detect PDCCH on CORESET0. At the same time, after a period of time (for example, 28 symbols) after receiving the PDCCH, NCR-MT can also use the transmitting beam used to send random access request when sending PUCCH. gNB can use the same beam as sending qnew on CORESET0 to send PDCCH to NCR-MT and schedule the corresponding PDSCH. The PDSCH contains the update information of the new beam, thereby completing the NCR-MT beam failure recovery process.

In one implementation, if the NCR-MT beam failure occurs in the secondary cell, the NCR-MT may send a MAC control element (CE) indicating beam failure recovery to the gNB, for example, sending the MAC CE to the gNB in the primary cell. The MAC CE includes one or more identifiers or indexes of the second target candidate reference signals that meet the conditions, and may also indicate the secondary cell where the beam failure occurs. Subsequently, the gNB may indicate the beam in the new secondary cell to the NCR-MT, and finally complete the NCR-MT beam failure recovery process.

In one embodiment, the first configuration information configured by the network device for the relay device includes at least one of the following: configuration information of a first reference signal resource set, configuration information of a second reference signal resource set, a first threshold (a first BLER threshold, a first RSRP threshold and/or a second RSRP threshold) or a third threshold, etc.

In one embodiment, the second configuration information configured by the network device for the relay device includes at least one of the following: configuration information of a third reference signal resource set, configuration information of a fourth reference signal resource set, a second threshold (a second BLER threshold, a third RSRP threshold and/or a fourth RSRP threshold) or a fourth threshold, etc.

In one embodiment, when the relay device executes the above step S302 and determines that the NCR-Fwd beam failure occurs, the relay The device may also perform the following steps.

S304: The relay device sends first indication information to the network device, to indicate that a beam failure occurs in a forwarding function entity of the relay device.

Among them, the first indication information can be used to indicate to network devices such as gNB that beam failure has occurred in NCR-Fwd.

In one embodiment, the first indication information can also be used to indicate the reference signal resource where NCR-Fwd beam failure occurs. For example, when in S302, the relay device determines whether the link quality corresponding to each reference signal resource is worse than the (pre) configured NCR-Fwd beam failure threshold (such as the first threshold) based on the measurement results of the relevant reference signal resources in the first reference signal resource set to determine whether the beam corresponding to each reference signal resource has a beam failure, the first indication information includes the indication information of the reference signal resources in the first reference signal resource set that do not meet the signal quality corresponding to the first threshold (such as the identification ID of the reference signal resource).

Further optionally, the first indication information may also indicate the RSRP or expected PDCCH BLER corresponding to the reference signal resource where the NCR-Fwd beam failure occurs. Optionally, when the relay device supports multiple frequency bands, the first indication information may also indicate one or more frequency bands where the beam failure occurs. Optionally, one or more frequency bands in the present application may be associated with one or more cells.

In one embodiment, the relay device may also send a second indication message to the network device, which is used to indicate at least one first target candidate beam reference signal on the forwarding function entity of the relay device. For example, the second indication message may also be used to indicate that at least one third reference signal resource is a first target candidate beam reference signal resource. For example, the second indication message may carry an identification ID of the third reference signal resource. Further, optionally, the second indication message may also indicate the RSRP of the first target candidate beam reference signal resource. Optionally, when the relay device supports multiple frequency bands, the second indication message may also indicate one or more frequency bands associated with the first target candidate beam reference signal resource when indicating the identification of the first target candidate beam reference signal resource.

In one implementation, the second indication information is used to indicate that no link quality corresponding to a reference signal resource in the third reference signal resource set can meet the second threshold.

In one implementation, the second indication information and the first indication information may be carried in the same signaling.

In one implementation, the first indication information and/or the second indication information may be carried in the first MAC CE. For example, a specific logical channel ID (LCID) is allocated for the beam failure recovery (BFR) of the NCR-Fwd, and the LCID is used to indicate that the first MAC CE is related information indicating the NCR-Fwd BFR.

Optionally, the first MAC CE may share the LCID with the MAC CE used by the common UE/NCR-MT for BFR. In the first MAC CE, a specific field may be used to indicate whether the first MAC CE is used to indicate that a beam failure has occurred in the NCR-MT or the NCR-Fwd.

Exemplarily, the current format of the UE's BFR MAC CE can be as shown in Figure 4, mainly including SP, Ci, AC and a reserved field R, etc.

Among them, SP and Ci are associated with different service cells, for example, SP is associated with a special cell (SpCell), and Ci is associated with the i-th service cell. When SP is 1, it can be used to indicate that a beam failure occurs in SpCell; when Ci is 1, it can be used to indicate that a beam failure occurs in the service cell corresponding to Ci; when Ci is 0, it can indicate that a beam failure does not occur in the service cell corresponding to Ci, or that a beam failure occurs in the service cell corresponding to Ci but no candidate reference signal that meets the conditions is found (for example, there is no target candidate beam reference signal resource that meets the conditions in the third reference signal resource set).

In addition, the second byte and subsequent bytes in the MAC CE can be sequentially associated with the service cell with Ci being 1 (i.e., indicating the cell where beam failure has occurred), wherein AC is used to indicate whether a second target candidate beam reference signal resource that meets the threshold is detected in the service cell. For example, when AC = 1, it indicates that a second target candidate beam reference signal resource that meets the threshold is detected in the cell associated with Ci, the second bit R is a reserved bit, and bits 3-8 are used to indicate the target candidate beam reference signal resource that meets the threshold. When AC = 0, it indicates that no target candidate beam reference signal resource that meets the threshold is detected in the cell associated with Ci, and bits 2-8 are reserved bits.

In a possible implementation, the second byte and subsequent bytes in the MAC CE can be sequentially associated with the SpCell with SP=1 or the service cell with Ci=1 to further indicate whether the corresponding information indicates that the NCR-Fwd or NCR-MT beam failure has occurred. For example, when the second bit of a row is 1 (or 0), it indicates that the NCR-MT beam failure has occurred in the service cell associated with the Ci or SP. The 3rd to 8th bits are used to indicate the identification information of the second target candidate beam reference signal resource that meets the NCR-MT signal quality (i.e., according to the definition of the BFR MAC CE of the original UE). When the 2nd bit of a row is 0 (or 1), it indicates that an NCR-Fwd beam failure has occurred in the service cell (or corresponding to a certain frequency band) associated with the Ci or SP, and the 3rd to 8th bits are used to indicate the identification information of the first target candidate beam reference signal resource that meets the NCR-Fwd signal quality, such as indicating the identification ID of the third reference signal resource.

Therefore, after the network device receives the first indication information, it can determine that the beam failure of NCR-Fwd occurs through the information of the agreed indication bit, and can determine the new candidate beam corresponding to NCR-Fwd according to the corresponding byte. Then the network device can reconfigure the beam of NCR-MT, and then determine the beam of NCR-Fwd through the predefined beam association rule between NCR-Fwd and NCR-MT (i.e., the aforementioned method one), or the network device directly indicates the beam of NCR-Fwd through dedicated signaling (i.e., the aforementioned method two).

In the above embodiment, although the beam failure detection and recovery mechanism and method are configured for both NCR-Fwd and NCR-MT, the two can also be performed independently. For example, the beam failure detection and recovery mechanism and method related to NCR-MT can be executed separately, and for example, the beam failure detection and recovery mechanism and method related to NCR-Fwd can be executed separately. Furthermore, the beam failure detection and beam failure recovery related to NCR-Fwd can also be executed separately. For example, after a beam failure detection occurs on NCR-Fwd, it can be reported to the network device (such as gNB). At this time, NCR may not execute the beam failure recovery process on NCR-Fwd, and can wait for gNB to determine the measurement and reporting process of the reference signal corresponding to the new beam trigger.

In the above embodiments, the beam failure detection method on NCR-Fwd can also be understood as an event-triggered channel status information reporting method, that is, when the beam on NCR-Fwd cannot meet the beam quality requirements of the forwarding function, the relay device actively reports to the network device, such as through a channel status information report (CSI-report). The embodiments of the present application do not impose any limitation on the specific name of the method.

The above implementation method can improve the sensitivity of NCR-Fwd beam failure detection by configuring the corresponding reference signal resource sets for NCR-MT and NCR-Fwd for the relay device, and configuring the corresponding signal quality threshold for beam failure detection/recovery, so that NCR-Fwd can detect beam failure events that NCR-MT has not detected, improve the efficiency and reliability of relay device beam failure detection, and avoid the problem of UE being unable to decode and causing service interruption. Furthermore, the quality of the candidate beams determined by NCR-Fwd after beam failure recovery can also be improved, thereby improving the communication efficiency of the relay device.

In addition, the present application also provides another relay beam failure detection method. When a beam failure occurs between a relay device and a network device, the beam recovery speed after the beam failure on the NCR-Fwd is accelerated to avoid a long-term beam interruption of the NCR-Fwd, thereby improving the communication quality and communication efficiency of the relay device forwarding uplink and downlink data. Specifically, after the NCR-MT determines the candidate reference signal and initiates the first duration of random access, the NCR-Fwd's transceiver beam is updated, which can effectively shorten the duration of the NCR-Fwd beam interruption.

As shown in FIG5 , the method can be applied to a relay device and includes the following steps.

S501: A relay device determines a second reference signal resource set and a fourth reference signal resource set.

Among them, the reference signal resources in the second reference signal resource set are used for beam failure detection of the relay device, and the reference signal resources in the fourth reference signal resource set are used to determine the target candidate beam reference signal resources after the beam of the relay device fails.

In one embodiment, the reference signal resources in the second reference signal resource set can be used for the NCR-MT of the relay device to perform beam failure detection, and the reference signal resources in the fourth reference signal resource set can be used to determine the target candidate beam reference signal resources after the NCR-MT beam of the relay device fails.

S502: The relay device determines whether a beam failure occurs in the mobile terminal function entity according to the reception and measurement results of the reference signal resources in the second reference signal resource set.

Furthermore, the relay device may receive and measure some reference signals in the second reference signal resource set to determine whether beam failure occurs in the NCR-MT.

When the relay device determines that the NCR-MT functional entity has a beam failure, the relay device can determine a target candidate beam reference signal resource for the relay device from the fourth reference signal resource set, wherein each reference signal in the fourth reference signal resource set is associated with a RACH resource, for example, including a RACH occasion (RACH occasion, RO) and/or a preamble sequence. The specific process of beam failure detection and candidate beam determination can refer to the relevant description of step S303 of the aforementioned embodiment.

Exemplarily, the target candidate beam reference signal resource determined by the relay device includes a third reference signal resource, and the third reference signal resource is associated with the first RACH resource.

Optionally, after a beam failure occurs in the NCR-MT, when it is determined that no link quality corresponding to a reference signal resource in the fourth reference signal resource set can meet the fourth threshold, that is, when a third reference signal resource that meets the beam recovery condition cannot be found, the forwarding function entity of the relay device is shut down. For specific methods, refer to the relevant description of step S303.

S503: The relay device sends a random access request to the network device.

Specifically, the mobile terminal function entity of the relay device may send random access request information to the network device on the first RACH resource corresponding to the third reference signal resource.

S504: The forwarding function entity of the relay device updates the transmit and receive beams on the backhaul link.

Specifically, the relay device may update the transceiver beam on the backhaul link after the first time duration after the above step S503, that is, after the first time duration after sending the random access request. During downlink forwarding, the forwarding function entity of the relay device uses the first receiving beam to receive signals on the backhaul link; and/or, during uplink forwarding, the forwarding function entity of the relay device uses the first transmitting beam to send signals on the backhaul link.

The first receiving beam is determined according to the receiving beam of the mobile terminal function entity of the relay device for receiving the third reference signal resource, and the first transmitting beam is determined according to the transmitting beam of the mobile terminal function entity of the relay device for sending a random access request.

The first duration may be preset by the relay device, or configured by the network device. Exemplarily, the first duration may be preset to 1 time slot. The first duration may be used by the network device to receive, decode or parse the random access request sent by the relay device.

Optionally, when the above-mentioned random access process is not successful, the relay device may use other beams to initiate random access, or select a new third reference signal resource, and use the RO and/or preamble sequence associated with the new third reference signal resource to initiate a random access request to the network device, or use the same beam to initiate random access after adjusting the power, and repeat the above-mentioned S503 and S504 processes.

In one implementation, as shown in FIG6 , the interaction process between the relay device and the network device, the method may include the following steps.

S601: The network device sends first configuration information to the relay device.

The first configuration information is used to indicate a second reference signal resource set and a fourth reference signal resource set.

Correspondingly, the relay device may determine the second reference signal resource set and the fourth reference signal resource set according to the received first configuration information.

S602: The network device sends a reference signal.

Specifically, the network device may send a reference signal on the resource corresponding to each reference signal in the second reference signal resource set. Correspondingly, the relay device may determine the time-frequency resource position for receiving each reference signal in the second reference signal resource set according to the received first configuration information.

S603: The relay device detects that a beam failure occurs in the mobile terminal functional entity.

S604: The network device sends a reference signal.

Specifically, the network device may send a reference signal on a resource corresponding to each reference signal in the fourth reference signal resource set.

S605: The relay device determines the third reference signal resource as a candidate beam reference signal, and initiates random access.

Correspondingly, the relay device can determine the time-frequency resource position of each reference signal in the fourth reference signal resource set according to the received first configuration information, and receive and measure, such as determining that the target candidate beam reference signal resource that meets the beam recovery condition is the third reference signal resource. Then, the relay device can use the RO and/or preamble sequence corresponding to the third reference signal resource to send a random access request message to the network device. For example, the first configuration information configures the association (or correspondence) relationship between the reference signal resources in the fourth reference signal resource set and the RO and/or preamble sequence.

Optionally, after a beam failure occurs in the NCR-MT, when it is determined that no link quality corresponding to a reference signal resource in the fourth reference signal resource set can meet the fourth threshold, that is, when a third reference signal resource that meets the beam recovery condition cannot be found, the forwarding function entity of the relay device is shut down. For specific methods, refer to the relevant description of step S303.

S606: The forwarding function entity of the relay device updates the transmit and receive beams on the backhaul link after the first time period.

Specifically, NCR-Fwd can use the receiving beam that receives the third reference signal resource on the backhaul link to receive the downlink forwarding signal, and use the transmitting beam corresponding to the receiving beam that receives the third reference signal resource (or the transmitting beam that sends the random access request) to send the uplink forwarding signal.

Correspondingly, when the network device successfully receives the random access request, the network device can determine the corresponding reference signal resources and the corresponding relay device/UE through the RO where the access request is located and/or the preamble sequence contained therein, and then determine that the relay device has a beam failure and a new target candidate beam. Then, the network device can also update the transceiver beams on the backhaul link with the relay device after the first time period.

Optionally, if the propagation delay between the network device and the relay device is taken into account, the network device updates the transceiver beam on the backhaul link with the relay device after a second time period, where the second time period may be configurable or preconfigured.

Optionally, when the above-mentioned random access process is not successful, the relay device may use other beams to initiate random access, or select a new third reference signal resource, and use the RO and/or preamble sequence associated with the new third reference signal resource to initiate a random access request to the network device, or use the same beam to initiate random access after adjusting the power, and repeat the above-mentioned S605 and S606 processes.

S607: The network device sends a random access response to the relay device.

In the above embodiment, after the relay device determines that the beam failure occurs in NCR-MT, it accelerates the beam recovery speed after the beam failure on NCR-Fwd, so that NCR-Fwd can achieve beam switching after the first time period after initiating the random access request (i.e., step S605), which can effectively shorten the duration of the NCR-Fwd beam interruption and improve the communication quality and efficiency of the relay device forwarding uplink and downlink data.

In the prior art, NCR-Fwd needs to update the transceiver beam after 28 symbols after step S607, which may cause a long beam interruption of NCR-Fwd. Alternatively, NCR-Fwd may update the transceiver beam after receiving the beam switching indication information from the network device after step S607, which may cause a long beam interruption of NCR-Fwd, affecting the uplink and downlink data forwarding services of the user equipment and causing communication interruption.

It should be noted that the embodiment shown in FIG. 5 of the present application can be combined with the embodiment shown in FIG. 3 or implemented separately. Similarly, the embodiment shown in FIG. 6 of the present application can be combined with the embodiment shown in FIG. 3 or implemented separately, and the present application does not impose any specific restrictions on this.

In addition, an embodiment of the present application also provides a beam failure detection method for a relay. When it is determined that a beam failure occurs in the NCR-MT, the terminal device may also detect the beam failure. By performing additional reference signal forwarding through the relay device, the terminal device can simultaneously measure the candidate beam while the relay device is measuring the candidate beam, thereby advancing the process of the terminal device performing the candidate beam measurement, thereby speeding up the beam recovery process and improving communication efficiency.

As shown in FIG. 7 , the method includes the following steps.

S701: A relay device determines a first reference signal resource set and a first forwarding resource set.

As described in S501 of the above embodiment, the relay device may be configured with a first reference signal resource set and a third reference signal resource set, wherein the reference signal resources in the first reference signal resource set may be used for beam failure detection of the relay device, and the reference signal resources in the third reference signal resource set may be used for determining target candidate beam reference signal resources after the relay device beam fails.

Optionally, the first reference signal resource set can be a reference signal resource set for NCR-Fwd beam failure detection, or it can be a reference signal resource set for NCR-MT beam failure detection (refer to the second reference signal resource set in the embodiment shown in Figure 3 above).

Optionally, the third reference signal resource set can be a candidate beam reference signal resource set for NCR-Fwd beam failure recovery, or it can be a candidate beam reference signal resource set for NCR-MT beam failure recovery (refer to the fourth reference signal resource set in the embodiment shown in Figure 3 above).

In addition, the relay device may determine a first forwarding resource set for periodically forwarding a reference signal. The first forwarding resource set may include at least one periodic forwarding resource. The relay device may determine the first forwarding resource set in the following three ways.

Mode 1: The relay device determines a first forwarding resource set according to a third reference signal resource set, and at least one periodic forwarding resource in the first forwarding resource set corresponds one-to-one to a time domain resource where at least one periodic reference signal resource in the third reference signal resource set is located.

Mode 2: Each periodic reference signal resource in the third reference signal resource set is associated with M periodic forwarding resources, where M is a positive integer, and the first forwarding resource set includes each periodic reference signal resource in the third reference signal resource set. periodic forwarding resources, wherein the M periodic forwarding resources associated with each periodic reference signal resource can be configured by a network device. For example, the first configuration information configures M periodic forwarding resources for each periodic reference signal resource. For another example, the first configuration information configures M-1 periodic forwarding resources associated with each periodic reference signal resource. Then, the time domain resource where the periodic reference signal resource is located and the M-1 periodic forwarding resources associated with the configuration constitute the M periodic forwarding resources associated with the periodic reference signal resource.

Mode 3: Determine the first forwarding resource set according to configuration information of the network device, for example, the first configuration information includes configuration information of multiple forwarding resources in the first forwarding resource set.

Each forwarding resource in the first forwarding resource set is associated with an access link beam.

Exemplarily, in the above-mentioned method 1: each reference signal resource in the third reference signal resource set is also associated with an access link beam, for example, the first configuration information may include an access link beam identifier for indicating each reference signal in the third reference signal resource set. For another example, the first configuration information may include a beam identifier for indicating M access links, and then the 1st to Mth reference signal resources in the third reference signal resource set are respectively associated with the 1st to Mth access link beams, and the (M+1)th to 2Mth reference signal resources are respectively associated with the 1st to Mth access link beams, and so on.

Exemplarily, under the above-mentioned method 2: the first configuration information can configure M associated periodic forwarding resources for each reference signal resource in the third reference signal resource set, and can also configure the access link beam associated with each periodic forwarding resource in the M periodic forwarding resources.

Exemplarily, under the above-mentioned method 3: each forwarding resource is also associated with an access link beam. For example, the first configuration information also configures the access link beam associated with each forwarding resource. For another example, the first configuration information may include a beam identifier for indicating M access links. Then, the 1st to Mth forwarding resources in the first forwarding resource set are respectively associated with the 1st to Mth access link beams, and the (M+1)th to 2Mth forwarding resources are respectively associated with the 1st to Mth access link beams, and so on.

Optionally, the first forwarding resource set may include at least one group of forwarding resources, and in each group of forwarding resources in the at least one group of forwarding resources, different forwarding resources are associated with different access link beams.

Exemplarily, under the above-mentioned method 1, the third reference signal resource set includes at least one group of reference signal resources, and the group of reference signal resources is associated with the group of forwarding resources. For example, a group of reference signal resources includes M reference signal resources, then the access side link beams associated with each M reference signal resources in the third reference signal resource set are different.

Exemplarily, in the above-mentioned method 2, one group of forwarding resources in at least one group of forwarding resources corresponds to M periodic forwarding resources associated with a periodic reference signal resource in the third reference signal resource set. Then, in the M periodic forwarding resources associated with each reference signal resource, the access side link beam associated with each periodic forwarding resource is different.

Exemplarily, under the above-mentioned method 3, the first forwarding resource set includes at least one group of forwarding resources. For example, the forwarding resources are configured in groups in the first configuration information, and a group of forwarding resources includes M forwarding resources. Then the access side link beams associated with each M forwarding resources in the first forwarding resource set are different.

Optionally, the first forwarding resource set may include at least one group of forwarding resources, and in each group of forwarding resources in the at least one group of forwarding resources, different forwarding resources are associated with the same backhaul link side beam.

In one implementation, similar to step S300 of the aforementioned embodiment, the method further includes: the relay device receives first configuration information and/or second configuration information from the network device, which is used to indicate the first reference signal resource set and the third reference signal resource set.

S702: After the relay device determines that beam failure occurs, the forwarding function entity starts to perform downlink forwarding on at least one periodic forwarding resource in the first forwarding resource set.

Optionally, the relay device determines that a beam failure occurs. It may be that the NCR-MT of the relay device determines that a beam failure occurs, or it may be similar to the embodiment shown in FIG. 3 above where the relay device determines that a beam failure occurs in the NCR-Fwd. This embodiment is not limited thereto.

In one implementation, in each group of forwarding resources in at least one group of forwarding resources, a forwarding function entity of the relay device uses an access link beam associated with the forwarding resource to perform downlink forwarding on the access link side.

In one implementation, in each group of forwarding resources in at least one group of forwarding resources, a forwarding function entity of the relay device uses a backhaul link side beam associated with the forwarding resource to perform downlink reception on the backhaul link side.

That is, when it is determined that a beam failure occurs on the NCR-MT and the NCR-MT is measuring the reference signal in the third reference signal resource set, the NCR-Fwd forwards the reference signal at the same time. The receiving beam used on the backhaul link during forwarding is the same as the receiving beam used by the NCR-MT on the control link, and the transmitting beam used on the access link during forwarding is the same as the transmitting beam used by the NCR-MT on the access link. The beam can be determined based on the access link beam associated with the reference signal resource.

In this case, the network device can configure the time domain position of the candidate beam reference signal set configured for the terminal device (such as the UE served by the relay device) and the time domain position of the first forwarding resource set to the same time domain configuration. When the relay device detects a beam failure, the UE may also detect a beam failure, so both the UE and the relay device will perform candidate beam detection. Through this configuration method, the relay device can additionally forward the reference signal when performing candidate beam measurement, so that the UE can also perform candidate beam measurement at the same time, thereby speeding up the UE beam failure recovery.

Optionally, the network device may also configure a second forwarding resource set for the relay device, the second forwarding resource set including at least one periodic forwarding resource, and when the relay device determines that a beam failure has occurred, the forwarding function entity begins uplink forwarding on at least one periodic forwarding resource of the second forwarding resource set. This uplink forwarding can increase the success probability of the relay device serving the UE BFR, such as forwarding a random access request after the UE BFR. It should be noted that the embodiment shown in FIG. 7 of the present application may be combined with the embodiment shown in FIG. 3, or may be implemented separately.

Exemplarily, as shown in FIG8 , the network device configures the same candidate reference signal resource set for the relay device and the UE, including reference signals RS1-1, RS1-2, RS2-1 and RS2-2. When the relay device detects that a beam failure has occurred, the relay device starts to measure these reference signals in the candidate reference signal resource set, and at the same time, downlinks these reference signals on the time domain resources corresponding to these reference signal resources. Therefore, the UE can also start measuring the candidate reference signal resource set after a beam failure occurs, so that the UE can determine the candidate beam as soon as possible and speed up the process of beam failure recovery.

The present application also provides a communication device, which can be used to execute the steps executed by the relay device in the embodiment described in Fig. 3. As shown in Fig. 9, the device 900 includes a processing module 901.

Among them, the processing module 901 is used to determine a first reference signal resource set and a second reference signal resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of the forwarding function entity of the device 900, and the reference signal resources in the second reference signal resource set are used for beam failure detection of the mobile terminal function entity of the device 900.

The processing module 901 is also used to determine whether a beam failure occurs in the forwarding function entity of the device 900 based on the measurement results of the reference signal resources in the first reference signal resource set; and to determine whether a beam failure occurs in the mobile terminal function entity of the device 900 based on the measurement results of the reference signal resources in the second reference signal resource set.

In one embodiment, the processing module 901 is specifically used to determine whether a beam failure occurs in the forwarding function entity of the device 900 based on a first measurement result set and a first threshold, wherein the first measurement result set includes a first measurement result, the first measurement result is a measurement result of a first reference signal resource, and the first reference signal resource is a reference signal resource in the first reference signal resource set.

In one implementation, the processing module 901 is specifically configured to determine whether a beam failure occurs in the forwarding function entity of the device 900 according to the first measurement result and the first threshold.

In one implementation, the first measurement result set also includes a second measurement result, where the second measurement result is a measurement result of a second reference signal resource, and the second reference signal resource is a reference signal resource in the first reference signal resource set.

In one embodiment, the first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource, the first threshold includes a first block error rate BLER threshold, and the processing module 901 is specifically used to determine whether a beam failure occurs based on the BLER of the physical downlink control channel corresponding to the first measurement result and the first BLER threshold.

Alternatively, the first threshold includes a first RSRP threshold and/or a second RSRP threshold, the first measurement result is the RSRP on the first reference signal resource, wherein the first reference signal resource is the first SSB, and the processing module 901 is specifically used to determine whether beam failure occurs based on the RSRP on the first SSB and the first RSRP threshold.

Alternatively, the first reference signal resource is a first CSI-RS, and the processing module 901 is specifically used to determine whether beam failure occurs according to the RSRP on the first CSI-RS and the second RSRP threshold.

In one implementation, the first threshold includes a first block error rate BLER threshold, and the processing module 901 is specifically used to determine whether beam failure occurs based on the BLER of the physical downlink control channel corresponding to the second measurement result and the first BLER threshold.

Alternatively, the first threshold includes a first RSRP threshold and/or a second RSRP threshold, the second measurement result is the RSRP on the second reference signal resource, wherein the second reference signal resource is a second SSB, and the processing module 901 is specifically used to: Determine whether beam failure occurs based on the RSRP on the second SSB and the first RSRP threshold.

Alternatively, the first reference signal resource is a second CSI-RS, and the processing module 901 is specifically used to determine whether beam failure occurs according to the RSRP on the second CSI-RS and the second RSRP threshold.

In one implementation, the first reference signal resource set and the second reference signal resource set are the same reference signal resource set.

In one implementation, the device 900 may further include a communication module 902, where the communication module 902 is used to send first indication information to a network device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the device 900.

In one embodiment, the device 900 may also include a communication module 902, which is used to receive first configuration information from a network device, wherein the first configuration information is used for beam failure detection of the device 900, and the first configuration information includes at least one of the following: configuration information of the first reference signal resource set, configuration information of the second reference signal resource set, a first threshold, a first BLER threshold, a first RSRP threshold or a second RSRP threshold.

In one embodiment, the processing module 901 can also be used to determine a third reference signal resource set and a fourth reference signal resource set, wherein the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the device 900 to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the device 900 to determine the second target candidate beam reference signal resources.

In one embodiment, the processing module 901 can also be used to determine at least one first target candidate beam reference signal resource from the third reference signal resource set based on a second threshold, wherein the RSRP on each candidate reference signal resource in the at least one first target candidate beam reference signal resource is greater than or equal to the second threshold.

In one embodiment, the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource. When the at least one first target candidate beam reference signal resource includes a third SSB and the second threshold includes a third RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold; or, when the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and the second threshold includes a fourth RSRP threshold, the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold; or, when the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, and the second threshold includes a third RSRP threshold and a fourth RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold, and the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold.

In one implementation, the apparatus 900 may further include a communication module 902, where the communication module 902 is used to send second indication information to the network device, where the second indication information is further used to indicate at least one first target candidate beam reference signal resource.

In one embodiment, the first indication information and/or the second indication information are carried in a medium access control control element MAC CE.

In one embodiment, the device 900 may also include a communication module 902, which is used to receive second configuration information from a network device, wherein the second configuration information is used for beam failure detection and/or beam failure recovery of the relay device, and the second configuration information includes at least one of the following: configuration information of a third reference signal resource set, configuration information of a fourth reference signal resource set, a second threshold, a third RSRP threshold or a fourth RSRP threshold.

In addition, the embodiment of the present application further provides a communication device, which can be used to execute the steps executed by the network device in the embodiment described in FIG3 . As shown in FIG9 , the device 900 includes a processing module 901 and a communication module 902 .

Among them, the processing module 901 is used to determine the first configuration information, and the first configuration information is used for the mobile terminal function entity of the relay device to perform beam failure detection, and the first configuration information includes configuration information of the first reference signal resource set and configuration information of the second reference signal resource set; wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of the forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of the mobile terminal function entity of the relay device.

The communication module 902 is used to send the first configuration information to the relay device.

In one embodiment, the processing module 901 is also used to determine second configuration information, wherein the second configuration information includes configuration information of a third reference signal resource set and configuration information of a fourth reference signal resource set; wherein the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine the second target candidate beam reference signal resources; and the communication module 902 is also used to send the second configuration information to the relay device.

In one implementation, the first reference signal resource set and the second reference signal resource set are the same reference signal resource set, and/or the third reference signal resource set and the fourth reference signal resource set are the same reference signal resource set.

In one embodiment, the first configuration information also includes a first threshold value, and the first threshold value is used by the relay device to determine whether a beam failure occurs in the forwarding function entity of the relay device based on the reference signal resources in the first reference signal resource set and the first threshold value.

In one implementation, the first threshold includes a first BLER threshold; or, the first threshold includes a first RSRP threshold and/or a second RSRP threshold.

In one implementation, the second configuration information further includes a second threshold, where the second threshold is used by the relay device to determine that at least one reference signal resource in the third reference signal resource set is a first target candidate beam reference signal resource.

In one implementation, if the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, the second threshold includes a third RSRP threshold and/or a fourth RSRP threshold.

In one implementation, the communication module 902 is further used to receive first indication information from the relay device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the relay device.

In one implementation, the communication module 902 is further used to receive second indication information from the relay device, where the second indication information is further used to indicate at least one first target candidate beam reference signal resource.

In one embodiment, the first indication information and/or the second indication information are carried in a media access control control element MAC CE.

In addition, the embodiment of the present application further provides a communication device, which can be used to execute the steps executed by the relay device in the embodiment described in the above-mentioned Figure 5 or Figure 6. As shown in Figure 9, the device 900 includes a processing module 901.

Among them, the processing module 901 is used to determine a second reference signal resource set and a fourth reference signal resource set, wherein the reference signal resources in the second reference signal resource set are used for beam failure detection of the device 900, and the reference signal resources in the fourth reference signal resource set are used to determine target candidate beam reference signal resources after the beam of the device 900 fails. The processing module 901 determines whether a beam failure occurs in the mobile terminal functional entity of the device 900 according to the measurement result of the reference signal resources in the second reference signal resource set. When it is determined that the beam failure occurs in the mobile terminal functional entity of the device 900, the target candidate beam reference signal resources for the device 900 are determined from the fourth reference signal resource set, and the target candidate beam reference signal resources include third reference signal resources, and the third reference signal resources are associated with a first random access channel RACH occasion (RACH occasion, RO) and/or a preamble sequence. The mobile terminal function entity of the device 900 sends a random access request to the network device on the first RACH resource. After the device sends the random access request for a first duration, when forwarding downlink, the forwarding function entity of the device uses the first receiving beam to receive the signal on the backhaul link; and/or, when forwarding uplink, the forwarding function entity of the device uses the first transmitting beam to send the signal on the backhaul link; wherein, the first receiving beam is determined according to the receiving beam of the mobile terminal function entity of the device 900 receiving the third reference signal resource, the first transmitting beam is determined according to the transmitting beam of the mobile terminal function entity of the device 900 sending the random access request, and the first duration is preset, or configured by the network device.

In addition, the embodiment of the present application further provides a communication device, which can be used to execute the steps executed by the relay device in the embodiment described in the foregoing FIG7 . As shown in FIG9 , the device 900 includes a processing module 901 and a communication module 902 .

Among them, the processing module 901 is used to determine a first reference signal resource set and a first forwarding resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of the device 900, and the first forwarding resource set includes at least one periodic forwarding resource. When the device 900 determines that a beam failure has occurred, the communication function 902 is used to perform downlink forwarding on the at least one periodic forwarding resource.

In one embodiment, the processing module 901 is also used to execute: determining the first forwarding resource set based on the third reference signal resource set, wherein at least one periodic forwarding resource in the first forwarding resource set corresponds one-to-one to the time domain resource where at least one periodic reference signal resource in the third reference signal resource set is located; wherein the reference signal resources in the third reference signal resource set are used to determine the target candidate beam reference signal resources after the beam of the device 900 fails, and the third reference signal resource set includes at least one periodic reference signal resource.

In an implementation manner, the communication module 902 is further configured to execute: receiving first configuration information from a network device, which is used to indicate the first reference signal resource set and the third reference signal resource set.

In one embodiment, the processing module 901 is also used to execute: determine the first forwarding resource set based on a third reference signal resource set, wherein the reference signal resources in the third reference signal resource set are used to determine the target candidate beam reference signal resources after the device beam fails, the third reference signal resource set includes at least one periodic reference signal resource, each periodic reference signal resource in the at least one periodic reference signal resource is associated with M periodic forwarding resources, M is a positive integer, and the first forwarding resource set includes the periodic forwarding resources associated with each periodic reference signal resource in the at least one periodic reference signal resource.

In one embodiment, each forwarding resource in the first forwarding resource is associated with an access link beam. When the forwarding function entity of the device starts to perform downlink forwarding on the at least one periodic forwarding resource, it performs downlink forwarding on the access link using the access link beam associated with the forwarding resource on each periodic forwarding resource.

In one embodiment, the first forwarding resources include at least one group of forwarding resources, and in each group of forwarding resources in the at least one group of forwarding resources, different forwarding resources are associated with different access link beams.

In one embodiment, in each group of forwarding resources in at least one group of forwarding resources, the forwarding function entity of the device uses the access link beam associated with the forwarding resource to perform uplink reception on the backhaul link side.

In one implementation, the third reference signal resource set includes at least one group of reference signal resources, and the group of reference signal resources is associated with the group of forwarding resources.

In one implementation, a group of forwarding resources in the at least one group of forwarding resources corresponds to M periodic forwarding resources associated with one periodic reference signal resource in the at least one periodic reference signal resource.

Specifically, the communication device 900 can implement the functions of the relay device or the network device in each of the possible implementation modes described above. For details, please refer to the detailed descriptions in the aforementioned method examples, which will not be repeated here.

It can be understood that, in combination with FIG. 2, when the above-mentioned device is an electronic device, the above-mentioned communication module can be a transceiver, which can include an antenna and a radio frequency circuit, etc., and the processing module can be a processor, such as a baseband chip, etc. When the device is a component having the functions of a relay device or a network device in the above-mentioned embodiment, the communication module can be a radio frequency unit, and the processing module can be a processor. When the device is a chip system, the communication module can be an input interface and/or output interface of the chip system, and the processing module can be a processor of the chip system, such as a central processing unit (CPU).

It should be noted that the specific execution process and embodiments in the above-mentioned device can refer to the steps and related descriptions executed by the relay device or network device in the above-mentioned method embodiment, and the technical problems solved and the technical effects brought about can also refer to the contents described in the above-mentioned embodiments, which will not be repeated here.

In this embodiment, the device is presented in the form of dividing each functional module in an integrated manner. The "module" here may refer to a specific circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the device can take the form shown in Figure 2 above.

Exemplarily, the function/implementation process of the processing module 901 in Figure 9 can be implemented by the processor 201 in Figure 2 calling the computer program instructions stored in the memory 204. For example, the function/implementation process of the communication module 902 in Figure 9 can be implemented by the communication interface 203 in Figure 2.

In some embodiments, the processor 201 in Figure 2 can call the computer execution instructions stored in the memory 204 so that the device 200 can perform the operations of the relay device or network device in the above-mentioned method embodiments, thereby realizing the above-mentioned possible implementation methods of the present application.

The communication device in each of the above-mentioned device embodiments may completely correspond to the relay device or network device in the method embodiment, and the corresponding steps are performed by the corresponding modules or units. For example, when the device is implemented in the form of a chip, the communication module may be an interface circuit of the chip for receiving signals from other chips or devices. The above-mentioned communication module for sending or receiving is an interface circuit of the device, which is used to send signals to other devices. For example, when the device is implemented in the form of a chip, the communication module may be an interface circuit for sending signals to other chips or devices.

In an exemplary embodiment, a computer-readable storage medium including instructions or a computer program product is also provided, and the instructions can be executed by the processor 201 of the communication device 200 to complete the method of the above embodiment. Therefore, the technical effects that can be obtained can refer to the above method embodiment, and will not be repeated here.

The present application also provides a computer program product, which includes instructions. When the instructions are executed, the computer can respectively perform operations of a relay device or a network device corresponding to the above method.

The embodiment of the present application also provides a system chip, which includes: a processing unit and a communication unit, the processing unit, for example, may be a processor, and the communication unit, for example, may be an input/output interface, a pin or a circuit, etc. The processing unit may execute computer instructions so that the communication device used by the chip performs the operations of the relay device and the network device in the method provided in the embodiment of the present application.

Optionally, any one of the communication devices provided in the above-mentioned embodiments of the present application may include the system chip.

Optionally, the computer instructions are stored in a storage unit.

An embodiment of the present application also provides a communication system, which may include: any one of the relay devices and network devices in the above-mentioned implementation modes.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application.

Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (53)

A communication device, characterized in that the device comprises a processor, and the processor is coupled to a memory; The memory is used to store computer programs or instructions; The processor is configured to execute a computer program or instruction stored in the memory, so that the apparatus is configured to perform: Determine a first reference signal resource set and a second reference signal resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of a forwarding function entity of a relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of a mobile terminal function entity of the relay device; Determining, according to the measurement result of the reference signal resources in the first reference signal resource set, whether a beam failure occurs in the forwarding function entity of the relay device; It is determined whether beam failure occurs in the mobile terminal function entity of the relay device according to the measurement result of the reference signal resources in the second reference signal resource set. The device according to claim 1, characterized in that the device is used to perform: Determining whether a beam failure occurs in a forwarding function entity of the device according to the first measurement result set and the first threshold; The first measurement result set includes a first measurement result, where the first measurement result is a measurement result of a first reference signal resource, and the first reference signal resource is a reference signal resource in the first reference signal resource set. The device according to claim 2, characterized in that the device is used to perform: It is determined whether a beam failure occurs in a forwarding function entity of the device according to the first measurement result and the first threshold. The device according to claim 2 or 3 is characterized in that the first measurement result set also includes a second measurement result, the second measurement result is a measurement result of a second reference signal resource, and the second reference signal resource is a reference signal resource in the first reference signal resource set. The device according to any one of claims 2 to 4, characterized in that The first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource; Determining whether a beam failure occurs in a forwarding function entity of the relay device according to the first measurement result set and the first threshold includes: The first threshold includes a first block error rate BLER threshold, and the relay device determines whether beam failure occurs according to the BLER of the physical downlink control channel corresponding to the first measurement result and the first BLER threshold; or, The first threshold includes a first RSRP threshold and/or a second RSRP threshold, and the first measurement result is the RSRP on the first reference signal resource, wherein: The first reference signal resource is a first SSB, and the relay device determines whether beam failure occurs according to the RSRP on the first SSB and the first RSRP threshold, or, The first reference signal resource is a first CSI-RS, and the relay device determines whether beam failure occurs according to the RSRP on the first CSI-RS and the second RSRP threshold. The device according to claim 4, characterized in that The first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource; Determining whether a beam failure occurs in a forwarding function entity of the relay device according to the first measurement result set and the first threshold includes: The first threshold includes a first block error rate BLER threshold, and the relay device determines whether beam failure occurs according to the BLER of the physical downlink control channel corresponding to the second measurement result and the first BLER threshold; or, The first threshold includes a first RSRP threshold and/or a second RSRP threshold, and the second measurement result is the RSRP on the second reference signal resource, wherein: The second reference signal resource is a second SSB, and the relay device determines whether beam failure occurs according to the RSRP on the second SSB and the first RSRP threshold, or, The second reference signal resource is a second CSI-RS, and the relay device determines whether beam failure occurs according to the RSRP on the second CSI-RS and the second RSRP threshold. The device according to any one of claims 1 to 6, characterized in that the first reference signal resource set and the The second reference signal resource set is the same reference signal resource set. The device according to any one of claims 1 to 7, characterized in that the device is also used to perform: A first indication information is sent to a network device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the device. The device according to any one of claims 1 to 8, characterized in that the device is also used to perform: receiving first configuration information from a network device, wherein the first configuration information is used for beam failure detection of the apparatus; The first configuration information includes at least one of the following: configuration information of the first reference signal resource set, configuration information of the second reference signal resource set, a first threshold, a first BLER threshold, a first RSRP threshold or a second RSRP threshold. The device according to any one of claims 1 to 9, characterized in that the device is also used to perform: Determining a third reference signal resource set and a fourth reference signal resource set; Among them, the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the device to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the device to determine the second target candidate beam reference signal resources. The device according to claim 10 is characterized in that, when it is determined that a beam failure occurs in a forwarding function entity of the device, the device is further configured to execute: Determine at least one first target candidate beam reference signal resource from the third reference signal resource set according to a second threshold; The RSRP on each candidate reference signal resource of the at least one first target candidate beam reference signal resource is greater than or equal to a second threshold. The apparatus according to claim 11, wherein the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, When the at least one first target candidate beam reference signal resource includes a third SSB, and the second threshold includes a third RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold; or, When the at least one first target candidate beam reference signal resource includes a third CSI-RS resource, and the second threshold includes a fourth RSRP threshold, the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold; or, When the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, and the second threshold includes a third RSRP threshold and a fourth RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold, and the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold. The device according to any one of claims 10 to 12, characterized in that the device is also used to perform: Sending second indication information to the network device, where the second indication information is also used to indicate at least one first target candidate beam reference signal resource. The device according to claim 8 or 13 is characterized in that the first indication information and/or the second indication information is carried in a medium access control control element MAC CE. The device according to any one of claims 1 to 14, characterized in that the device is also used to perform: receiving second configuration information from a network device, wherein the second configuration information is used for beam failure detection and/or beam failure recovery of the apparatus; The second configuration information includes at least one of the following: configuration information of a third reference signal resource set, configuration information of a fourth reference signal resource set, a second threshold, a third RSRP threshold or a fourth RSRP threshold. A communication device, characterized in that the device comprises a processor, and the processor is coupled to a memory; The memory is used to store computer programs or instructions; The processor is configured to execute a computer program or instruction stored in the memory, so that the apparatus is configured to perform: Determine first configuration information, where the first configuration information is used for a relay device to perform beam failure detection, and the first configuration information includes configuration information of a first reference signal resource set and configuration information of a second reference signal resource set; Sending the first configuration information to the relay device; The reference signal resources in the first reference signal resource set are used for beam failure detection of the forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for the mobile terminal function entity of the relay device. Beam failure detection of the body. The device according to claim 16, characterized in that the device is also used to perform: Determine second configuration information, where the second configuration information includes configuration information of a third reference signal resource set and configuration information of a fourth reference signal resource set; Sending the second configuration information to the relay device; Among them, the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine the second target candidate beam reference signal resources. The device according to claim 16 or 17 is characterized in that the first reference signal resource set and the second reference signal resource set are the same reference signal resource set, and/or the third reference signal resource set and the fourth reference signal resource set are the same reference signal resource set. The device according to any one of claims 16-18 is characterized in that the first configuration information also includes a first threshold, and the first threshold is used by the relay device to determine whether a beam failure occurs in the forwarding function entity of the relay device based on the reference signal resources in the first reference signal resource set and the first threshold. The device according to claim 19, characterized in that The first threshold comprises a first BLER threshold; or, The first threshold includes a first RSRP threshold and/or a second RSRP threshold. The device according to claim 17 is characterized in that the second configuration information also includes a second threshold, and the second threshold is used by the relay device to determine that at least one reference signal resource in the third reference signal resource set is a first target candidate beam reference signal resource. The device according to claim 21 is characterized in that the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, and the second threshold includes a third RSRP threshold and/or a fourth RSRP threshold. The device according to any one of claims 16 to 22, characterized in that the device is also used to perform: First indication information is received from the relay device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the relay device. The device according to claim 23, characterized in that the device is also used to perform: Second indication information is received from the relay device, where the second indication information is also used to indicate at least one first target candidate beam reference signal resource. A beam failure detection method for a relay, characterized in that it is applied to a relay device, the relay device includes a mobile terminal function entity and a forwarding function entity, and the method includes: Determine a first reference signal resource set and a second reference signal resource set, wherein the reference signal resources in the first reference signal resource set are used for beam failure detection of a forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of a mobile terminal function entity of the relay device; Determining, according to the measurement result of the reference signal resources in the first reference signal resource set, whether a beam failure occurs in the forwarding function entity of the relay device; It is determined whether beam failure occurs in the mobile terminal function entity of the relay device according to the measurement result of the reference signal resources in the second reference signal resource set. The method according to claim 25, characterized in that determining whether a beam failure occurs in a forwarding function entity of the relay device according to a measurement result of a reference signal resource in a first reference signal resource set comprises: Determining whether a beam failure occurs in a forwarding function entity of the relay device according to the first measurement result set and the first threshold; The first measurement result set includes a first measurement result, where the first measurement result is a measurement result of a first reference signal resource, and the first reference signal resource is a reference signal resource in the first reference signal resource set. The method according to claim 26, characterized in that determining whether a beam failure occurs in a forwarding function entity of the relay device according to the first measurement result set and the first threshold value comprises: It is determined whether a beam failure occurs in a forwarding function entity of the relay device according to the first measurement result and the first threshold. The method according to claim 26 or 27, characterized in that the first measurement result set also includes a second measurement result set. The second measurement result is a measurement result of a second reference signal resource, and the second reference signal resource is a reference signal resource in the first reference signal resource set. The method according to any one of claims 26 to 28, characterized in that The first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource; The determining, according to the first measurement result set and the first threshold, whether a beam failure occurs in the forwarding function entity of the relay device includes: The first threshold includes a first block error rate BLER threshold, and the relay device determines whether beam failure occurs according to the BLER of the physical downlink control channel corresponding to the first measurement result and the first BLER threshold; or, The first threshold includes a first RSRP threshold and/or a second RSRP threshold, and the first measurement result is the RSRP on the first reference signal resource, wherein: The first reference signal resource is a first SSB, and the relay device determines whether beam failure occurs according to the RSRP on the first SSB and the first RSRP threshold, or, The first reference signal resource is a first CSI-RS, and the relay device determines whether beam failure occurs according to the RSRP on the first CSI-RS and the second RSRP threshold. The method according to claim 28, characterized in that The first reference signal resource set includes at least one synchronization signal block SSB and/or at least one channel state information reference signal CSI-RS resource; The determining, according to the first measurement result set and the first threshold, whether a beam failure occurs in the forwarding function entity of the relay device includes: The first threshold includes a first block error rate BLER threshold, and the relay device determines whether beam failure occurs according to the BLER of the physical downlink control channel corresponding to the second measurement result and the first BLER threshold; or, The first threshold includes a first RSRP threshold and/or a second RSRP threshold, and the second measurement result is the RSRP on the second reference signal resource, wherein: The second reference signal resource is a second SSB, and the relay device determines whether beam failure occurs according to the RSRP on the second SSB and the first RSRP threshold, or, The second reference signal resource is a second CSI-RS, and the relay device determines whether beam failure occurs according to the RSRP on the second CSI-RS and the second RSRP threshold. The method according to any one of claims 25-30 is characterized in that the first reference signal resource set and the second reference signal resource set are the same reference signal resource set. The method according to any one of claims 25 to 31, characterized in that the method further comprises: First indication information is sent to a network device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the relay device. The method according to any one of claims 25 to 32, characterized in that the method further comprises: receiving first configuration information from a network device, where the first configuration information is used for beam failure detection of the relay device; The first configuration information includes at least one of the following: configuration information of the first reference signal resource set, configuration information of the second reference signal resource set, a first threshold, a first BLER threshold, a first RSRP threshold or a second RSRP threshold. The method according to any one of claims 25 to 33, characterized in that the method further comprises: Determining a third reference signal resource set and a fourth reference signal resource set; Among them, the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine the second target candidate beam reference signal resources. The method according to claim 34 is characterized in that, after determining that a beam failure occurs in the forwarding function entity of the relay device, the method further comprises: Determine at least one first target candidate beam reference signal resource from the third reference signal resource set according to a second threshold; The RSRP of each candidate reference signal resource in the at least one first target candidate beam reference signal resource is is greater than or equal to a second threshold. The method according to claim 35, characterized in that the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, When the at least one first target candidate beam reference signal resource includes a third SSB and the second threshold includes a third RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold; or, When the at least one first target candidate beam reference signal resource includes a third CSI-RS resource, and the second threshold includes a fourth RSRP threshold, the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold; or, When the at least one first target candidate beam reference signal resource includes a third CSI-RS resource and a third SSB, and the second threshold includes a third RSRP threshold and a fourth RSRP threshold, the RSRP measured on the third SSB is greater than or equal to the third RSRP threshold, and the RSRP measured on the third CSI-RS resource is greater than or equal to the fourth RSRP threshold. The method according to any one of claims 32 to 36, characterized in that the method further comprises: Sending second indication information to the network device, where the second indication information is also used to indicate at least one first target candidate beam reference signal resource. The method according to claim 32 or 37 is characterized in that the first indication information and/or the second indication information is carried in a medium access control control element MAC CE. The method according to any one of claims 25 to 38, characterized in that the method further comprises: Receive second configuration information from a network device, where the second configuration information is used for beam failure detection and/or beam failure recovery of the relay device, and the second configuration information includes at least one of the following: configuration information of a third reference signal resource set, configuration information of a fourth reference signal resource set, a second threshold, a third RSRP threshold or a fourth RSRP threshold. A method for detecting beam failure of a relay, characterized in that it is applied to a network device, and the method comprises: Determine first configuration information, where the first configuration information is used for a relay device to perform beam failure detection, and the first configuration information includes configuration information of a first reference signal resource set and configuration information of a second reference signal resource set; Sending the first configuration information to the relay device; The reference signal resources in the first reference signal resource set are used for beam failure detection of the forwarding function entity of the relay device, and the reference signal resources in the second reference signal resource set are used for beam failure detection of the mobile terminal function entity of the relay device. The method according to claim 40, characterized in that the method further comprises: Determine second configuration information, where the second configuration information includes configuration information of a third reference signal resource set and configuration information of a fourth reference signal resource set; Sending the second configuration information to the relay device; Among them, the reference signal resources in the third reference signal resource set are used by the forwarding function entity of the relay device to determine the first target candidate beam reference signal resources, and the reference signal resources in the fourth reference signal resource set are used by the mobile terminal function entity of the relay device to determine the second target candidate beam reference signal resources. The method according to claim 40 or 41 is characterized in that the first reference signal resource set and the second reference signal resource set are the same reference signal resource set, and/or the third reference signal resource set and the fourth reference signal resource set are the same reference signal resource set. The method according to any one of claims 40-42 is characterized in that the first configuration information also includes a first threshold, and the relay device determines whether a beam failure occurs in the forwarding function entity of the relay device based on the reference signal resources in the first reference signal resource set and the first threshold. The method according to claim 43 is characterized in that the first threshold includes a first BLER threshold; or, the first threshold includes a first RSRP threshold and/or a second RSRP threshold. The method according to claim 41 is characterized in that the second configuration information also includes a second threshold, and the second threshold is used by the relay device to determine that at least one reference signal resource in the third reference signal resource set is a first target candidate beam reference signal resource. The method according to claim 45 is characterized in that the third reference signal resource set includes at least one SSB and/or at least one CSI-RS resource, and the second threshold includes a third RSRP threshold and/or a fourth RSRP threshold. The method according to any one of claims 40 to 46, characterized in that the method further comprises: First indication information is received from the relay device, where the first indication information is used to indicate that a beam failure occurs in a forwarding function entity of the relay device. The method according to claim 47, characterized in that the method further comprises: Second indication information is received from the relay device, where the second indication information is also used to indicate at least one first target candidate beam reference signal resource. The method according to claim 47 or 48 is characterized in that the first indication information and/or the second indication information is carried in a media access control control element MAC CE. A computer-readable storage medium, characterized in that computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are called by the computer, the computer is used to enable the computer to execute the method described in any one of claims 25 to 39, or to execute the method described in any one of claims 40 to 49. A computer program product comprising instructions, characterized in that when the computer program product is run on a computer, the computer is caused to execute the method as described in any one of claims 25 to 39, or the method as described in any one of claims 40 to 49. A chip, characterized in that the chip is coupled to a memory and is used to read and execute program instructions stored in the memory to implement the method as described in any one of claims 25 to 39, or to execute the method as described in any one of claims 40 to 49. A communication system, characterized in that the communication system comprises the communication device according to any one of claims 1-15 and the communication device according to any one of claims 16-24.