WO2020134984A1

WO2020134984A1 - Beam failure recovery method and apparatus

Info

Publication number: WO2020134984A1
Application number: PCT/CN2019/123757
Authority: WO
Inventors: 刘湘蒲; 刘坤鹏; 向高; 田廷剑
Original assignee: 华为技术有限公司
Priority date: 2018-12-29
Filing date: 2019-12-06
Publication date: 2020-07-02
Also published as: CN111385890A; CN111385890B

Abstract

The present application relates to the technical field of communications. Disclosed are a beam failure recovery method and apparatus. The method comprises: a terminal device receives first information sent by a network device, the first information being used for indicating a resource corresponding to each beam in a first beam set; the terminal device selects a second beam from a second beam set after the occurrence of a beam failure is determined; and if the second beam is a beam other than the first beam set, the terminal device sends a beam recovery request to the network device by using resources corresponding to the second beam, the resources corresponding to the second beam comprising resources corresponding to multiple beams in the first beam set. By adopting the method, the terminal device can send the beam recovery request to the network device by using the resources corresponding to multiple beams in the first beam set, that is, the recovery of a beam is indicated in an implicit indication manner, so as to greatly improve the probability of successful beam recovery.

Description

Beam failure recovery method and device

Cross-reference of related applications

This application requires the priority of the Chinese patent application filed on December 29, 2018 in the Chinese Patent Office with the application number 201811642479.3 and the application name "a beam failure recovery method and device", the entire content of which is incorporated by reference in this application in.

Technical field

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

Background technique

The 5th generation (5G) system will use a higher carrier frequency (generally, greater than 6 GHz or higher) relative to long term evolution (LTE), such as 28 GHz, 38 GHz, or 72 GHz frequency band Etc. to achieve wireless communication with greater bandwidth and higher transmission rate. Due to the high carrier frequency, the wireless signal it transmits experiences a more severe fading during the space propagation process, and it is difficult to detect the wireless signal even at the receiving end. To this end, beamforming (BF) technology will be used in 5G systems to obtain beams with good directivity to increase antenna gain, increase power in the transmitting direction, and improve signal-to-interference and noise ratio at the receiving end (signal to interference) plus noise (ratio, SINR).

During the communication between the network device and the terminal device, since both the network device and the terminal device require beamforming, beam alignment is required to maintain the link quality. However, when the wireless signal transmission is blocked (such as human bodies, vehicles, buildings, etc.) or the reflector of the wireless signal changes or the wireless signal is switched from line-of-sight transmission LOS (line of light) to non-line-of-sight transmission NLOS (non-line of light), it may cause misalignment between the originally aligned network equipment and the beam of the terminal equipment, resulting in rapid degradation or interruption of the link quality, causing the terminal equipment to fail to enter the link (radio link failure, RLF) .

In order to avoid frequent RLF caused by beam misalignment, the 5G system introduces beam failure recovery (BFR) technology to support the completion of beam recovery before link failure to shorten link interruption time. For the specific implementation of beam failure recovery, further research is still needed.

Summary of the invention

The present application provides a beam failure recovery method and device, which are used to improve the possibility of beam recovery success.

In the first aspect, this application provides a beam failure recovery method, including:

The terminal device receives first information sent by the network device, where the first information is used to indicate a resource corresponding to each beam in the first beam set;

After determining that a beam failure occurs, the terminal device selects a second beam from a second beam set, where the second beam set includes the beam in the first beam set and at least one beam other than the first beam set;

If the second beam is a beam other than the first beam set, the terminal device sends a beam recovery request to the network device using resources corresponding to the second beam, and the resources corresponding to the second beam include Resources corresponding to multiple beams in the first beam set.

Using the above method, on the one hand, after determining that a beam failure has occurred, the terminal device can select the recovery beam from the second beam set, which expands the selection of recovery beams compared to being able to select the recovery beam only from the first beam set The range greatly improves the possibility that the terminal equipment selects the available recovery beam. On the other hand, if the recovery beam selected by the terminal device is a beam other than the first beam set, the terminal device may use a resource corresponding to multiple beams in the first beam set to send a beam recovery request to the network device, that is, by implicit indication To indicate the restoration of beams, so that resources corresponding to each beam in the first beam set configured by the network device can be used not only to report beams in the first beam set, but also to implicitly report beams outside the first beam set, thereby Can greatly improve the possibility of beam recovery success.

In a possible design, before the terminal device selects the second beam from the second beam set, the method further includes:

The terminal device receives second information sent by the network device, where the second information is used to indicate that the reporting method of the terminal device is a combined resource reporting method.

In this way, the terminal device can determine the reporting method of the terminal device based on the second information sent by the network device.

In a possible design, the method further includes: the terminal device receives third information sent by the network device, and the third information is used to determine a resource corresponding to the second beam.

In this way, the terminal device can determine the resource corresponding to the second beam based on the third information sent by the network device.

In a possible design, the third information is used to determine resources corresponding to the second beam, including: the third information is used to configure a combined beam corresponding to the second beam, and the second beam The corresponding combined beam includes the multiple beams.

In this way, the terminal device may determine that the resources corresponding to the second beam include resources corresponding to the multiple beams according to the combined beam corresponding to the second beam.

In a possible design, the third information is used to determine resources corresponding to the second beam, including: the third information is used to configure an associated beam set of the multiple beams, and the second beam Beams in the intersection of the associated beam sets of the multiple beams.

In this way, according to the associated beam set of multiple beams, if the terminal device determines that the second beam is a beam in the intersection of the associated beam sets of multiple beams, it can be determined that the resources corresponding to the second beam include the resources corresponding to the multiple beams. Resources.

In a possible design, the third information is used to determine resources corresponding to the second beam, including: the third information is used to configure the number of the second beam and the plurality of beams, so The number of the second beam is a value calculated by using preset rules for the number of the multiple beams.

In this way, according to the second beam and the multiple beam numbers, if the terminal device determines that the second beam number is the value calculated by the preset number of the multiple beam numbers, it can be determined that the resources corresponding to the second beam include Resources corresponding to the multiple beams.

In a possible design, the second beam corresponds to multiple sets of resources;

Sending, by the terminal device, a second beam recovery request to the network device using resources corresponding to the second beam, including: the terminal device selecting a group of resources from the plurality of groups of resources, and using the selected resources to The network device sends a second beam recovery request.

In this way, since the second beam corresponds to multiple sets of resources, the terminal device can select a suitable set of resources from multiple resources to send a beam recovery request when reporting the second beam, for example, a beam corresponding to a better quality beam can be selected Resources to send a beam recovery request, so that the network device can receive the beam recovery request sent by the terminal device.

In a possible design, after the terminal device sends the second beam restoration request to the network device using the resources corresponding to the second beam, the method further includes:

After receiving the beam recovery responses returned by the network device through the multiple beams, the terminal device communicates with the network device through the second beam; or,

After receiving the beam recovery response returned by the network device through the second beam, the terminal device communicates with the network device through the second beam.

In a second aspect, the present application provides a beam failure recovery method. The method includes:

The network device sends first information to the terminal device, where the first information is used to indicate a resource corresponding to each beam in the first beam set;

The network device receives a beam recovery request sent by the terminal device using resources corresponding to a second beam, the second beam is a beam other than the first beam set, and the resources corresponding to the second beam include the first Resources corresponding to multiple beams in a beam set.

In a possible design, the method further includes: the network device sends second information to the terminal device, where the second information is used to indicate that the reporting method of the terminal device is a combined resource reporting method.

In a possible design, the method further includes: the network device sends third information to the terminal device, where the third information is used to determine a resource corresponding to the second beam.

In a possible design, the method further includes:

After the network device returns the first beam recovery response to the terminal device through the multiple beams, respectively, communicates with the network device through the second beam; or,

After the network device returns a second beam recovery response to the terminal device through the second beam, it communicates with the network device through the second beam; in this way, since the network device is After the two beams, the beam recovery response is returned to the terminal device, which can effectively save transmission resources; and because the terminal device does not need to monitor the beam recovery response in the response monitoring time window of the first multiple beams, it can speed up the beam failure recovery process and improve the beam failure Recovery efficiency.

In a third aspect, the present application provides an apparatus, which may be a network device or a terminal device, or may be a semiconductor chip provided in the network device or the terminal device. The device has functions to realize various possible implementation manners of the first aspect and the second aspect. This function can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In a fourth aspect, an apparatus of the present application includes: a processor and a memory; the memory is used to store computer-executed instructions, and when the apparatus is running, the processor executes the computer-executed instructions stored in the memory to cause the apparatus to execute The method performed by the terminal device as described in the first aspect or any one of the first aspect above, or the method performed by the apparatus to perform the method performed by the network device as described in the second aspect or any one of the second aspect above.

According to a fifth aspect, the present application further provides a communication system including the terminal device in any design of the first aspect described above and the network device in any design of the second aspect described above.

According to a sixth aspect, the present application also provides a computer-readable storage medium, in which instructions are stored in the computer-readable storage medium, which when executed on a computer, causes the computer to execute the method described in the above aspects.

In a seventh aspect, the present application also provides a computer program product including instructions, which when executed on a computer, causes the computer to perform the method described in the above aspects.

These or other aspects of the present application will be more concise and understandable in the description of the following embodiments.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of a possible communication system to which an embodiment of this application is applicable;

2a and 2b are schematic diagrams of beam failure recovery of network equipment and terminal equipment;

3 is a schematic flowchart of a beam failure recovery method according to Embodiment 1 of the present application;

4a is an example of an implicit indication rule provided by an embodiment of this application;

4b is another example of the implicit indication rule provided by the embodiment of the present application;

FIG. 4c is another example of the implicit indication rule provided by the embodiment of the present application;

FIG. 5a is an example of a network device returning a beam recovery response provided by an embodiment of this application;

FIG. 5b is another example of the network device returning a beam recovery response provided by an embodiment of the present application;

6 is a schematic diagram of the overall process interaction of the beam failure recovery method provided in Embodiment 2 of the present application;

7 is a possible exemplary block diagram of the device involved in the embodiment of the present application;

8 is a schematic diagram of a communication device provided by an embodiment of the present application;

9 is a schematic structural diagram of a terminal device according to an embodiment of this application;

10 is a schematic structural diagram of a network device according to an embodiment of this application.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

First, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) Terminal device: It is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (E.g. airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( wireless terminal in industrial control, wireless terminal in self-driving (self-driving), wireless terminal in remote medical (remote medical), wireless terminal in smart grid (smart grid), transportation safety (transportation safety) Wireless terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc. The embodiments of the present application do not limit the application scenarios. Terminal equipment may sometimes be called user equipment (user equipment (UE), access terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, terminal equipment, Wireless communication equipment, UE agent or UE device, etc.

(2) Network device: It can be a device that communicates with a terminal device, such as a base station or a base station controller. The network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area (cell). The network device can be a global mobile communication (global system for mobile communications, GSM) system or a base station (base transceiver) (BTS) in code division multiple access (CDMA) or broadband code division multiple access (BTS) The base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system can also be an evolved base station (evolved NodeB, eNB or eNodeB) in the LTE system, or a cloud wireless access network (cloud radio access network) , CRAN) scenario wireless controller, or network equipment can be relay stations, access points, vehicle equipment, wearable devices and future 5G network network equipment, such as new radio (new radio (NR) base station ( gNodeB or gNB) or transmission/receiving point/transmission reception point (TRP), or the network device may also be a network device in a public land mobile network (PLMN) network that evolves in the future, etc. Examples are not limited.

(3) Beam (beam): A major problem of high-frequency communication is that the signal energy drops sharply with the transmission distance, resulting in a short signal transmission distance. In order to overcome this problem, high-frequency communication adopts analog beam technology and performs weighting processing through a large-scale antenna array to concentrate the signal energy in a small range to form a beam-like signal (called analog beam, referred to as beam ) To increase the transmission distance.

A beam is a communication resource. The beam can be a wide beam, a narrow beam, or other types of beams. The technique of forming a beam may be a beam forming technique or other technical means. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, a hybrid digital/analog beamforming technology, and so on. Different beams can be considered as different communication resources, and the same information or different information can be sent through different beams. Optionally, multiple beams with the same or similar communication characteristics may be regarded as one beam, and one beam may include one or more antenna ports for transmitting data channels, control channels, and sounding signals. It can be understood that one or more antenna ports forming a beam may also be regarded as a set of antenna ports, and the beam may also be called a spatial filer. The beam includes a transmit beam and a receive beam. The transmit beam can refer to the distribution of signal strength formed in different directions in the space after the signal is transmitted by the antenna. The receive beam can refer to the antenna array strengthening or weakening the wireless signal in different directions in space Received distribution. In the embodiment of the present application, for example, the network device sends a beam recovery response through the transmission beam x1. Accordingly, the terminal device can receive the beam recovery response through the reception beam x2. In this case, the transmission beam x1 and the reception beam x2 can be Understand as a beam pair. It should be noted that the embodiment of the present application does not make a clear distinction between the transmitting beam and the receiving beam for the time being. The foregoing transmitting beam x1 and receiving beam x2 may be collectively referred to as beam x, which can be understood as that the network device sends a beam recovery response through beam x Accordingly, the terminal device may receive the beam recovery response through beam x.

In the current NR protocol, the beam can be reflected through the quasi-colocation (QCL) relationship of the antenna ports. Specifically, the signals of the two co-beams have a QCL relationship with respect to the spatial receiving parameter (spatial Rx parameter), that is, QCL-Type D: {Spatial Rx parameter} in the protocol. The beam can be specifically expressed in the protocol by the identification of various signals, such as the resource index of the channel state information reference signal (channel-state information reference, CSI-RS), and the synchronous signal broadcast channel block (synchronous signal/physical broadcast channel channel block , SS/PBCH block, can also be referred to as SSB) index, sound reference resource (SRS) resource index, tracking reference signal (TRS) resource index.

In addition, in general, a beam corresponds to a DMRS port or a transmission configuration number (TCI) or a TRP or a sounding reference signal resource indicator (SRS resource indicator (SRI) (for uplink data transmission) Therefore, different beams can also be represented by different DMRS ports or TCI or TRP or SRI.

As the DMRS port, TCI, TRP, SRI, CSI-RS resource index, SS/PBCH block index, SRS resource index and TRS resource index can all represent beams. Therefore, the following DMRS port and TCI can also be replaced with beam, TRP, SRI, CSI-RS resource index, SS/PBCH block index, SRS resource index or TRS resource index, and the replacement does not change this application The essence of the method provided by the embodiment.

(4) Antenna port: Antenna port is a logical concept. One antenna port can correspond to one physical transmit antenna or multiple physical transmit antennas. In both cases, the receiver of the terminal will not decompose the signal from the same antenna port. Because from the perspective of the terminal, whether the channel is formed by a single physical transmit antenna or a combination of multiple physical transmit antennas, the reference signal corresponding to this antenna port defines this antenna port, for example, corresponding to demodulation The antenna port of the reference signal (de-modulation reference) (DMRS) is the DMRS port, and the terminal can obtain the channel estimation of the antenna port according to the reference signal. Each antenna port corresponds to a time/frequency resource grid with its own reference signal. An antenna port is a channel, and the terminal needs to perform channel estimation and data demodulation according to the reference signal corresponding to the antenna port.

(5) Beam management resources: refer to resources used for beam management, and can also be embodied as resources used for calculating and measuring beam quality. Specifically, the beam management resources may include synchronization signal (synchronization signal, SS), synchronization signal block (synchronization signal block, SSB), synchronous broadcast signal block (SS/PBCH) block broadcast channel, broadcast channel demodulation reference signal, tracking reference Signal, downlink channel measurement reference signal, downlink control channel demodulation reference signal, downlink shared channel demodulation reference signal, uplink sounding reference signal, uplink random access signal, etc.

(6) Beam indication information: used to indicate the beam used for transmission. The beam indication information may include a beam number, a beam management resource number, an uplink signal resource number, a downlink signal resource number, an absolute index of the beam, a relative index of the beam, a logical index of the beam, an index of the antenna port corresponding to the beam, and a beam Corresponding antenna port group index, index of the downlink signal corresponding to the beam, time index of the downlink synchronization signal block corresponding to the beam, beam pair connection (BPL) information, transmission parameter (Tx parameter) corresponding to the beam, beam correspondence Rx parameters, transmission weight corresponding to the beam, weight matrix corresponding to the beam, weight vector corresponding to the beam, reception weight corresponding to the beam, index of the transmission weight corresponding to the beam, index of the weight matrix corresponding to the beam, index of the weight matrix corresponding to the beam At least one of the index of the weight vector of the beam, the index of the reception weight corresponding to the beam, the reception codebook corresponding to the beam, the transmission codebook corresponding to the beam, the index of the reception codebook corresponding to the beam, and the index of the transmission codebook corresponding to the beam , Downlink signals include synchronization signals, broadcast channels, broadcast signal demodulation signals, CSI-RS, cell-specific reference signals (CS-RS), UE-specific reference signals (user equipment specific reference signal, US-RS) 1. The downlink control channel demodulation reference signal, downlink data channel demodulation reference signal, and downlink phase noise tracking signal. The uplink signal includes any one of a medium uplink random access sequence, an uplink sounding reference signal, an uplink control channel demodulation reference signal, an uplink data channel demodulation reference signal, and an uplink phase noise tracking signal. Optionally, the network device may also assign a QCL identifier to a beam having a quasi-co-lacation (QCL) relationship among beams associated with the frequency resource group. The beam indication information may also be embodied as a transmission configuration number (transmission configuration index, TCI). The TCI may include various parameters, such as a cell number, a bandwidth part number, a reference signal identifier, a synchronization signal block identifier, and a QCL type.

(7) The various numerical numbers such as the first, second, etc. involved in the embodiments of the present application are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application, nor do they represent the order. "And/or" describes the relationship of the related objects, indicating that there can be three relationships, for example, A and/or B, which can indicate: there are three cases of A alone, A and B, and B alone. "At least one" means one or more. At least two means two or more. "At least one", "any one" or similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one (a, b) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be a single or can be Multiple.

FIG. 1 is a schematic structural diagram of a possible communication system to which an embodiment of the present application is applicable. The communication system shown in FIG. 1 includes network equipment and terminal equipment. It should be understood that FIG. 1 is only a schematic structural diagram of a communication system, and the number of network devices and the number of terminal devices in the communication system are not limited in the embodiments of the present application, and the communication system to which the embodiments of the present application applies includes network devices. In addition to the terminal device, other devices may also be included, such as a core network device, a wireless relay device, and a wireless backhaul device, etc., which is not limited in this embodiment of the present application. And, the network device in the embodiment of the present application may integrate all functions into an independent physical device, or may distribute the functions on multiple independent physical devices, which is not limited in this embodiment of the present application. In addition, the terminal device in the embodiment of the present application may be connected to the network device in a wireless manner.

The communication system applicable to the above system architecture may be various radio access technology (RAT) systems, such as code division multiple access (code division multiple access (CDMA), time division multiple access (time division multiple access, TDMA) , Frequency division multiple access (frequency division multiple access (FDMA), orthogonal frequency division multiple access (orthogonal frequency-division multiple access (OFDMA), single carrier frequency division multiple access (single carrier FDMA, SC-FDMA) and other systems, etc. . The term "system" can be used interchangeably with "network". CDMA systems can implement wireless technologies such as universal wireless terrestrial access (UTRA), CDMA2000, and so on. UTRA may include wideband CDMA (Wideband CDMA, WCDMA) technology and other CDMA variant technologies. CDMA2000 can cover interim standard (IS) 2000 (IS-2000), IS-95 and IS-856 standards. The TDMA system can implement wireless technologies such as global system for mobile (GSM). OFDMA system can realize such as evolved universal wireless terrestrial access (evolved UTRA, E-UTRA), ultra mobile broadband (ultra mobile broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA And other wireless technologies. UTRA and E-UTRA are UMTS and UMTS evolved versions. 3GPP's long-term evolution (LTE) and various versions based on LTE evolution are new versions of UMTS that use E-UTRA. In addition, the communication system can also be adapted to future-oriented communication technologies.

The system architecture and business scenarios described in the embodiments of the present application are to more clearly explain the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. With the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

In the architecture illustrated in FIG. 1, network devices and terminal devices can communicate through beamforming technology. However, when a beam failure occurs (such as due to sudden channel fluctuations, unexpected obstacle interruption, terminal device rotation, and other factors, resulting in beam misalignment between the network device and the terminal device), the terminal device will not be able to decode any downlink (downlink, The DL) signal and/or the network device will not be able to decode any uplink (UL) signal, causing the terminal device to fall into RLF. In response to this problem, a feasible solution currently proposed is to avoid frequent RLF due to beam failure through beam failure recovery.

Among them, the main principle of beam failure recovery is that the network device or the terminal device adjusts the failed beam to other available beams according to the beam measurement result, thereby avoiding frequent RLF caused by beam failure. Specifically, the terminal device can detect the beam failure event, and since the terminal device can perform beam measurement and learn the latest beam quality measurement result, the beam failure recovery process can also be triggered by the terminal device.

The third generation partnership project (3rd generation partnership project, 3GPP) version 15 (R15) stipulates that beam failure recovery can be achieved through a non-competitive random access process. Specifically, after determining that a beam failure occurs, the terminal device may select an available beam from the candidate beam list configured by the network device as the recovery beam, and use the random access channel (random access channel) corresponding to the recovery beam , RACH) resource reports the recovery beam to the network device, so that the network device switches to the recovery beam and communicates with the terminal device. Further, the agreement also stipulates that the maximum number of beams in the candidate beam list and their corresponding RACH resources is 16 (specifically embodied as maxNrofCandidateBeams=16), that is, the network device can only select 16 beams as Alternative beam list, and configure RACH resources corresponding to 16 beams, and the terminal device can only select available beams from the 16 beams, and report to the network device through the RACH resources corresponding to the available beams, in order to achieve beam failure restore.

However, in actual applications, the number of beams corresponding to the entire antenna is generally greater than 16, when the actual available beams are not in the candidate beam list pre-configured by the network device, because the network device does not configure the terminal device with the available beam corresponding RACH resources, so that the terminal device cannot report the available beam, and ultimately fails to complete the beam failure recovery. For example, referring to the scenario illustrated in FIG. 2a and FIG. 2b, the beam currently being communicated between the network device and the terminal device is beam 17, and at this time, there is another beam 38 that can be used as the restoration beam. When occlusion occurs, the terminal device detects that the quality of the beam 17 has decreased, and it needs to recover from the beam failure to switch to the beam 38. However, the 16 candidate beam lists pre-configured by the network device do not include the beam 38. RACH resources and cannot report beam 38 to the network device, and although the beams in the alternative beam list (such as beam 30) are configured with corresponding RACH resources, there may be a failure to report or a low beam quality report, resulting in failure to complete Beam failure recovery.

According to the above, the maximum number of beams in the candidate beam list and their corresponding RACH resources (that is, 16) in the beam failure recovery is specified in the protocol, so that the candidate beam list may not cover all beams of the network device. When the recovery beam is not in the candidate beam list configured by the network device, the terminal device cannot report the recovery beam to the network device, thereby causing failure of beam recovery.

Based on this, the embodiments of the present application provide a beam failure recovery method, which is used to solve the technical problem of beam recovery failure caused by the recovery beam not being located in the alternative beam list configured by the network device, so as to improve the possibility of successful beam recovery.

Example one

FIG. 3 is a schematic flowchart of a beam failure recovery method according to Embodiment 1 of the present application, as shown in FIG. 3, including:

Step 301: The network device sends first information to the terminal device, where the first information is used to indicate a resource corresponding to each beam in the first beam set. Accordingly, the terminal device may receive the first information sent by the network device.

Here, the network device may send the first information to the first terminal device in various ways, for example, the network device may use a broadcast channel, system message, system message update, paging message, downlink control channel, downlink data channel or Downlink resources or channels such as downlink shared channels are sent to the terminal equipment through radio resource control (RRC) signaling, media access control unit (media access control (MAC) CE) or downlink control information (downlink control information, DCI), etc. Send the first message.

In one example, the first information may include a first beam set and a resource corresponding to each beam in the first beam set. The first beam set may include one or more beams, for example, the first beam set may include 16 beams (in this case, the first beam set may also be understood as the candidate beam list described above). The resource corresponding to each beam in the first beam set may be a RACH resource, where the RACH resource may include a sequence for sending RACH through the beam, a time-frequency resource location, and so on. As shown in Table 1, it is an example of resources corresponding to each beam in the first beam set.

Table 1: Examples of resources corresponding to each beam in the first beam set

波束指示信息Beam indicator information	波束对应的RACH资源RACH resources corresponding to the beam
波束a1Beam a1	RACH资源b1RACH resource b1
波束a2Beam a2	RACH资源b2RACH resource b2
……...	……...
波束a16Beam a16	RACH资源b16RACH resource b16

It can be seen from Table 1 that the first beam set includes 16 beams. Exemplarily, the resource corresponding to beam a1 is RACH resource b1, that is, if the terminal device determines that beam a1 is a recovery beam, RACH can be used The resource b1 reports the beam a1 to the network device; the resource corresponding to the beam a2 is the RACH resource b2, that is, if the terminal device determines that the beam a2 is the recovery beam, the RACH resource b2 can be used to report the beam a2 to the network device.

In the embodiment of the present application, the network device may also send configuration information related to beam failure detection to the terminal device. For example, the configuration information related to beam failure detection may include beam management resource (available for beam failure detection) information and a decision threshold (Can be used for beam failure judgment). The beam management resource information and the decision threshold are described in detail below.

(1) Beam management resource information

The beam management resource information may include information of one or more reference signals (CSI-RS or SSB). Taking the beam management resource information including information of the first reference signal as an example, the information of the first reference signal may include the information of the first reference signal Identification (such as CSI-RS resource ID, synchronization channel number index (SSB index)) and other information of the first reference signal (such as time-frequency resource location, port number, period and offset, etc.).

Correspondingly, after receiving the beam management resource information, the terminal device may measure the first reference signal sent by the network device through beam d according to the information of the first reference signal to obtain the quality of beam d. Furthermore, the terminal device can compare the quality of the beam d with the decision threshold. If the quality of the beam d is higher than or equal to the decision threshold, the beam d is normal, and if the quality of the beam d is lower than the decision threshold, the beam d fails. , And then step 302 can be performed.

(2) Judgment threshold

Considering that there are multiple metrics used to measure the quality of the beam, for example, possible metrics include one or more of the following: reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received quality) , RSRQ), reference signal received strength indicator (received signal strength) (RSSI), signal-to-interference and noise ratio (signal to interference and noise ratio, SINR), channel quality indicator (channel quality indicator (CQI), rank indicator (rank indicator) RI), precoding matrix indicator (precoding matrix indicator, PMI) and block error rate (block error rate, BLER). Correspondingly, there may be multiple decision thresholds.

Specifically, if the measurement index of the beam quality is the reference signal received power, the reference signal received quality, or the reference signal received strength indicator, the terminal device may receive the first reference signal, and then compare the first reference signal Perform measurement to obtain the reference signal received power of the first reference signal, the reference signal received quality of the first reference signal, or the reference signal received strength indication of the first reference signal. In the embodiment of the present application, if the decision threshold is set with the reference signal received power as a unit of measurement, the terminal device may measure the first reference signal to obtain the reference signal received power of the first reference signal, so that the first The reference signal received power of the reference signal is compared with the decision threshold; if the first threshold is set with the reference signal received quality as the unit of measurement, the terminal device measures the first reference signal to obtain the reference signal received quality of the first reference signal , In order to compare the reference signal reception quality of the first reference signal with the decision threshold; if the first threshold is set with the reference signal reception strength indication as the unit of measurement, the terminal device measures the first reference signal to obtain the first The reference signal reception strength indication of the reference signal is convenient for comparing the reference signal reception strength indication of the first reference signal with the decision threshold. Other situations are similar and will not be introduced one by one here.

Step 302: After determining that a beam failure occurs, the terminal device selects a second beam from a second beam set, where the second beam set includes the beam in the first beam set and at least one beam other than the first beam set That is, the first beam set is a subset of the second beam set.

In the embodiment of the present application, before the terminal device selects the second beam from the second beam set, it may further include: the network device sends second information to the terminal device, and the second information is used to indicate that the reporting method of the terminal device is the combined resource reporting method Correspondingly, the terminal device receives the second information and determines to use the combined resource reporting method to report the recovered beam. Among them, the network device may send the second information to the terminal device in various ways, for example, the network device may use a broadcast channel, system message, system message update, paging message, downlink control channel, downlink data channel, or downlink shared channel For downlink resources or channels, the second information is sent to the terminal device through RRC signaling, MAC CE or DCI, etc.

Among them, there may be multiple specific implementation manners of instructing the reporting method of the terminal device. In an example, it can be indicated by a 1-bit identifier. For example, "1" indicates the combined resource reporting method. For example, it can be expressed as combined RACH flag=1; "0" indicates the non-combined resource reporting method. Exemplarily, it can be expressed as combined RACH flag=0. Or, "0" indicates a combined resource reporting method, and "1" indicates a non-combined resource reporting method. In yet another example, an information element (IE) can be added to RRC signaling, MAC CE, or DCI, such as BFR-combined RACH, where the value is on/off, on represents the combined resource reporting method, and off represents Non-combined resource reporting method. In yet another example, an IE may be added to RRC signaling, MAC CE or DCI, such as BFR-candidate Beam RACH-type, which is used to explicitly indicate two or more reporting methods. Exemplarily, BFR-candidateBeamRACH-type=normal, indicating the non-combined resource reporting method, BFR-candidateBeamRACH-type=combined, indicating the combined resource reporting method. It should be noted that the combined resource reporting method is the reporting method provided in this embodiment of the present application, and the non-combined resource reporting method may be the above-mentioned method of using the resources corresponding to each beam in the alternative beam list to report each beam.

The main idea of the combined resource reporting method is that for beams other than the first beam set (that is, the candidate beam list), resources corresponding to two or more beams in the first beam set can be used to report the beam. Since the combined resource reporting method is adopted, the terminal device can report beams other than the first beam set to the network device. Therefore, after a beam occurs, the terminal device can select any available beam (such as the second beam) from the second beam set ) As a recovery beam.

Step 303: If the second beam is a beam other than the first beam set, the terminal device uses a resource corresponding to the second beam to send a beam recovery request to the network device (that is, report the second beam) The resources corresponding to the second beam include resources corresponding to multiple beams in the first beam set (the reporting method described here is a combined resource reporting method).

Correspondingly, in step 304, the network device receives a beam restoration request sent by the terminal device using the resources corresponding to the second beam.

In the embodiment of the present application, the terminal device may determine the resource corresponding to the second beam based on the third information. The third information may be determined by the network device and sent to the terminal device. For example, the network device may use downlink resources such as broadcast channels, system messages, system message updates, paging messages, downlink control channels, downlink data channels, or downlink shared channels or The channel sends third information to the terminal device through RRC signaling, MAC CE or DCI.

In an example, the third information may be used to configure a combined beam (including a combined beam corresponding to the second beam) corresponding to each beam in the second beam set except the first beam set, and the combination corresponding to each beam The beam includes at least two beams in the first beam set. In the embodiment of the present application, the network device may configure the combined beam corresponding to each beam in the second beam set except the first beam set according to the spatial position relationship of the beams, the design index of the beam gain/shape, etc. Be limited. Taking the second beam as an example, the resources corresponding to the second beam may include resources corresponding to each beam in the combined beam corresponding to the second beam. Further, the combined beam corresponding to the second beam may include one or more sets of combined beams, and accordingly, the resources corresponding to the second beam may also include one or more sets of resources.

For example, referring to FIG. 4a, beam a1, beam a2, beam a3, and beam a4 are beams in the first beam set, and beam c is a beam other than the first beam set. The combined beam corresponding to beam c includes multiple sets of combined beams, such as four sets of combined beams, respectively: (1) beam a1 and beam a2, (2) beam a3 and beam a4, (3) beam a1 and beam a3, ( 4) Beam a2 and beam a4. If the combined beam corresponding to beam c includes beam a1 and beam a2, the resources corresponding to beam c include RACH resource b1 and RACH resource b2; if the combined beam corresponding to beam c includes beam a2 and beam a4, the resources corresponding to beam c include RACH resource b2 and RACH resource b4 are similar in other situations and will not be listed one by one. That is to say, the resources corresponding to beam c include 4 sets of resources, namely: (1) RACH resource b1 and RACH resource b2, (2) RACH resource b3 and RACH resource b4, (3) RACH resource b1 and RACH resource b3, (4) RACH resource b2 and RACH resource b4.

In the above example, the case where the third information is used to configure the combined beam corresponding to each beam except the first beam set in the second beam set is mainly described (that is, the combined beam corresponding to the first beam set is not configured), it can be understood Ground, the third information may also configure a combined beam corresponding to each beam in the second beam set (that is, a combined beam corresponding to the first beam set may also be configured), for example, the combined beam corresponding to beam a1 may include beam a5 and beam a6 . In this implementation manner, when configuring a combined beam corresponding to each beam in the second beam set, the network device does not need to consider whether the beam is a beam in the first beam set, and can configure each beam to correspond to the same rule Combination beam. Further, if the terminal device selects beam a1 as the recovery beam, there are two groups of beams corresponding to beam a1 at this time, namely (1) RACH resource b1, (2) RACH resource b5 (resource corresponding to beam a5) and RACH resource b6 (Resource corresponding to beam a6), the terminal device may report beam a1 using RACH resource b1, or may report beam a1 using RACH resource b5 and RACH resource b6.

In yet another example, the third information may be used to configure an associated beam set of multiple beams in the first beam set. Taking beam a1 as an example, the associated beam set of beam a1 may include beam a1 and the second beam set At least one beam. For example, if the first beam set includes 16 beams, the third information can be used to configure the associated beam set of each beam in the M (M is less than or equal to 16) beams, where the value of M can be based on the actual Need to be set. In the embodiment of the present application, the network device may configure the associated beam set of multiple beams in the first beam set according to the spatial position relationship of the beams, the design index of the beam gain/shape, etc. For example, taking beam a1 as an example, the network The device may configure the four beams adjacent to beam a1, namely, up, down, left, and right, and beam a1 as the associated beam set of beam a1.

For example, referring to FIG. 4b, beam a1, beam a2, beam a3, and beam a4 are beams in the first beam set, and beam c1, beam c2, beam c3, and beam c4 are beams other than the first beam set. The associated beam set of beam a1 includes beam a1, beam a5, beam a6, beam c1, and beam c2, and the associated beam set of beam a2 includes beam a2, beam a7, beam a8, beam c1, and beam c3, and the associated beam set of beam a3 It includes beam a3, beam a9, beam a10, beam c2 and beam c4, and the associated beam set of beam a4 includes beam a4, beam a11, beam a12, beam c3 and beam c4. It can be seen that beam c1 is a beam at the intersection of the associated beam set of beam a1 and the associated beam set of beam a2. Thus, the resources corresponding to beam c1 include RACH resource b1 and RACH resource b2; beam c2 is the associated beam of beam a1 Beams in the intersection of the set of beams associated with beam a3, and thus, the resources corresponding to beam c2 include RACH resource b1 and RACH resource b3; beam c3 is the intersection of the beam set associated with beam a2 and the beam set associated with beam a4 Beams, as such, the resources corresponding to beam c3 include RACH resources b2 and RACH resources b4; beam c4 is a beam at the intersection of the associated beam set of beam a3 and the associated beam set of beam a4, so the resources corresponding to beam c4 include RACH resources b3 and RACH resource b4.

It should be noted that in a possible situation, the value of M may be related to the number of beams in the second beam set other than the first beam set, for example, the first beam set includes beam a1 to beam a16, The second beam set includes beams a1 to a16 and beams c1 to c4 (that is, the number of beams in the second beam set other than the first beam set is 4). As such, referring to FIG. 4b, since beam c1 is a beam in the intersection of the associated beam set of beam a1 and the associated beam set of beam a2, beam c2 is a beam in the intersection of the associated beam set of beam a1 and the associated beam set of beam a3 , Beam c3 is the beam in the intersection of the associated beam set of beam a2 and beam a4, and beam c4 is the beam in the intersection of the related beam set of beam a3 and the beam set of beam a4, therefore, only configuration is required The associated beam sets of beam a1, beam a2, beam a3, and beam a4 (in this case, M=4) can obtain resources corresponding to beams other than the first beam set in the second beam set.

In yet another example, the third information is used to configure the number of multiple beams in the second beam set. For example, the second beam set includes 50 beams, of which 16 beams are beams in the first beam set. The three pieces of information can be used to configure the number of 34 beams other than the first beam set and the number of N (N less than or equal to 16) beams in the first beam set. Among them, the value of N can be set according to actual needs. Taking the third information for configuring the number of each beam in the second beam set as an example, FIG. 4c exemplarily shows a beam numbering method. The network device adopts the horizontal direction first according to the spatial distribution relationship of the beams in the horizontal and pitch directions. , The numbering sequence of the vertical direction behind, the beams are sequentially numbered. The number of the beam may be the same as the identifier of the reference signal on the beam (such as SSB index or CSI-RS resource ID).

For example, the terminal device may determine the resources corresponding to each beam in the second beam set except the first beam set according to the number of each beam in the second beam set and the preset rule. The preset rule may be agreed between the terminal device and the network device, or determined by the terminal device and notified to the network device, or determined by the network device and notified to the terminal device, which is not specifically limited. Exemplarily, the preset rule may be to obtain an average value, taking beam c (beams other than the first beam set) as an example, the number of beam c = (number of beam a1 + number of beam a2)/2, Or, the number of beam c=(number of beam a3+number of beam a4+number of beam a5)/3, that is to say, the number of beam c may be the number of two or more beams calculated by a preset rule The resulting value. Specifically, if beam c is the beam numbered 9 (abbreviated as beam 9), since beam c is numbered 8 (the corresponding beam is referred to as beam 8) and 10 (the corresponding beam is referred to as beam 10), the average Value, therefore, the resources corresponding to beam 9 may include the resources corresponding to beam 8 and beam 10, where beam 8 and beam 10 are both beams in the first beam set. Understandably, the resources corresponding to beam 9 may also include resources corresponding to beam 1 and beam 17, that is, there may be multiple groups of resources corresponding to beam 9.

It can be seen from the above three examples that the recovery beam (which may be a beam other than the beam in the first beam set or a beam in the first beam set) may correspond to multiple sets of resources. In this embodiment of the present application, if If the terminal device determines that there are multiple sets of resources corresponding to the recovered beam, it may select a set of resources from the multiple sets of resources, and use the selected resources to send a beam recovery request (that is, report the recovered beam) to the network device. There are many specific selection rules. For example, a group of resources with the best beam quality can be selected based on the beam quality. For example, there are two groups of resources corresponding to the restored beam, namely: (1) RACH resource b1 and RACH resource b2, (2) RACH resource b3 and RACH resource b4, if the quality of beam a1 and beam a2 is good, but the quality of beam a3 and beam a4 is poor, the terminal device can use RACH resource b1 and RACH resource b2 to send beams to the network device Resume request.

It can be known from the foregoing that the resources corresponding to beams in the second beam set other than the first beam set can be determined through the third information, because the resources corresponding to the beam include resources corresponding to multiple beams in the first beam set, that is, resources That is to say, the beam is implicitly indicated by multiple beams in the first beam set. Therefore, the third information may also be referred to as an implicit indication rule. Understandably, in addition to the situations described in the above three examples, there are other possible implicit indication methods, which are not specifically limited in this embodiment of the present application, but any implicit beam indication second beam set is implemented based on the above ideas The specific implementation manners of the beams other than the first beam set are within the protection scope of the present invention.

Regarding the above steps 301 to 303, it should be noted that: (1) The network device can send the first information, the second information, and the third information through the same signaling, or can also send separately through multiple signaling The first information, the second information, and the third information are not specifically limited. (2) In the above description, the network device may send the second information to the terminal device to indicate the reporting method of the terminal device. In other possible implementation manners, the reporting method of the terminal device may also be indicated implicitly. For example, if When the terminal device receives the implicit indication rule (third information) sent by the network device, it determines that the reporting method of the terminal device is the combined resource reporting method. If the terminal device does not receive the implicit indication rule (third information) sent by the network device , It is determined that the reporting method of the terminal device is a non-combined resource reporting method. (3) In the above step 302, if the reporting method of the terminal device is a non-combined resource reporting method, after determining that a beam failure occurs, the terminal device may select the first beam from the first beam set and use the resource corresponding to the first beam to The network device sends a beam recovery request. For specific implementation, refer to the prior art.

Further, the above method may further include step 305 and step 306.

Step 305: The network device sends a beam recovery response to the terminal device according to the received beam recovery request sent by the terminal device using the resources corresponding to the second beam. Correspondingly, the terminal device can receive the beam recovery response and complete the beam failure recovery.

In the embodiments of the present application, with regard to the combined resource reporting method, there may be multiple specific implementation manners in which the terminal device sends a beam recovery request and the network device returns a beam recovery response.

In a possible implementation, the terminal device may use the resources corresponding to the second beam (which may include resources corresponding to multiple beams in the first beam set) to send a beam recovery request to the network device, and the network device may pass multiple Each beam returns the first beam recovery response to the terminal device. For example, the resources corresponding to the second beam include resources corresponding to beam a1, resources corresponding to beam a2, ..., resources corresponding to beam an, where n can be an integer less than 16, and the terminal device can use beam a1 to correspond , Resources corresponding to beam a2, ..., resources corresponding to beam an send a beam recovery request to the network device, and the network device may return a beam recovery response to the terminal device through beam a1, beam a2, ..., beam an respectively. Specifically, referring to FIG. 5a, the terminal device uses the resource corresponding to beam a1 to send beam recovery request 1 to the network device. Accordingly, after receiving the beam recovery request 1 sent by the terminal device through beam a1, the network device can switch to The beam recovery response 1 is returned to the terminal device on the beam a1. Accordingly, the terminal device can detect the beam recovery response 1 within the response monitoring time window; the terminal device uses the resources corresponding to the beam a2 to send the beam recovery request 2 to the network device, accordingly After receiving the beam recovery request 2 sent by the terminal device through beam a2, the network device can switch to beam a2 and return beam recovery response 2 to the terminal device. Accordingly, the terminal device can detect the beam recovery response within the response monitoring time window 2; By analogy, the terminal device uses the resources corresponding to beam an to send a beam recovery request n to the network device. Correspondingly, after the network device receives the beam recovery request n sent by the terminal device through beam an, it can switch to beam an The terminal device returns the beam recovery response n, and accordingly, the terminal device can monitor the beam recovery response n within the response monitoring time window. In this way, the network device can determine the recovered beam as the second beam according to the implicit indication rule and beam a1, beam a2, ..., beam an, and the terminal device can detect the beam recovery response 1, beam recovery response 2, ... 2. The beam recovery response n determines that the beam failure recovery is completed, and then step 306 can be performed. In this way, since the terminal device uses the resources corresponding to each beam to send a beam recovery request, the beam recovery response is monitored within the corresponding response monitoring time window. Therefore, if the terminal device is in the first n-1 response monitoring time windows If any beam recovery response is not detected within any response monitoring time window, you can directly determine that the beam recovery failed without sending another beam recovery request (for example, after the terminal device sends beam recovery request 1, the beam recovery response is not detected 1, there is no need to send beam recovery request 2 to beam recovery request n), thereby saving transmission resources.

In yet another possible implementation manner, the terminal device may use resources corresponding to the second beam (which may include resources corresponding to multiple beams in the first beam set) to send a beam recovery request to the network device, and the network device may The second beam returns a second beam recovery response to the terminal device. Following the above example, specifically, as shown in FIG. 5b, the terminal device sends the beam recovery request 1 to the network device using the resources corresponding to the beam a1, and accordingly, after the network device receives the beam recovery request 1 sent by the terminal device through the beam a1 Since the recovery beam is not yet determined, the beam recovery response may not be returned; the terminal device uses the resources corresponding to beam a2 to send the beam recovery request 2 to the network device, and accordingly, the network device receives the beam recovery request sent by the terminal device through beam a2 After 2, after the recovery beam has not been determined, the beam recovery response may not be returned; and so on, the terminal device sends the beam recovery request 1n to the network device using the resources corresponding to the beam an, and accordingly, the network device receives the terminal through the beam an After the beam recovery request n sent by the device, based on the implicit indication rule, it is determined that the recovery beam is the second beam, so it can switch to the second beam and return the beam recovery response k to the terminal device. Correspondingly, after receiving the beam recovery response k through the second beam, the terminal device may determine that the beam failure recovery is completed, and then step 306 may be performed. In this way, the network device returns the beam recovery response to the terminal device after determining the recovery beam based on the implicit indication rule, which can effectively save transmission resources; and because the terminal device only needs to monitor after sending the beam recovery request n Beam recovery response without monitoring the beam recovery response in the first n-1 response monitoring time windows, which can speed up the beam failure recovery process and improve the efficiency of beam failure recovery.

Step 306, the network device and the terminal device communicate through the second beam.

In an embodiment of the present application, on the one hand, after determining that a beam failure occurs, the terminal device can select the recovery beam from the second beam set, which expands the recovery beam compared to being able to select the recovery beam only from the first beam set The range of choice greatly improves the possibility that the terminal equipment selects the available recovery beam. On the other hand, if the recovery beam selected by the terminal device is a beam other than the first beam set, the terminal device may use a resource corresponding to multiple beams in the first beam set to send a beam recovery request to the network device, that is, by implicit indication To indicate the restoration of beams, so that resources corresponding to each beam in the first beam set configured by the network device can be used not only to report beams in the first beam set, but also to implicitly report beams outside the first beam set, thereby Can greatly improve the possibility of beam recovery success.

It should be noted that the implicit indication method of the beam provided in the embodiment of the present invention can also be extended to the beam reporting process in other possible scenarios; for example, the resource corresponding to beam a1 is RACH resource b1, and the resource corresponding to beam a2 The resource is RACH resource b2, and the resources corresponding to beam c include RACH resource b1 and RACH resource b2 (that is, beam a1 and beam a2 implicitly indicate beam c). Thus, the terminal device uses RACH resource b1 and RACH resource b2 to report the beam After that, the network device may determine that the beams reported by the terminal device include beam a1, beam a2, and beam c; it can be seen that by introducing an implicit indication method, the number of reported beams can be increased.

Example 2

The following describes a possible overall process interaction situation of the beam failure recovery method provided by an embodiment of the present application with reference to FIG. 6.

FIG. 6 is a schematic diagram of the overall process interaction of the beam failure recovery method provided in Embodiment 2 of this application, as shown in FIG. 6, including:

Step 601, the network device sends configuration information to the terminal device. Here, the configuration information may include the configuration information related to beam failure detection described in Embodiment 1, the first information, the second information, and the third information. The second information may be used to indicate that the reporting method of the terminal device is a combined resource reporting method or a non-combined resource reporting method.

Understandably, the network device may send the above configuration information through one signaling, or may send the above configuration information through different signaling, which is not specifically limited.

Accordingly, in step 602, the terminal device receives configuration information.

Here, the terminal device may perform beam failure detection according to configuration information related to beam failure detection, and may determine the resource corresponding to each beam in the first beam set based on the first information, and may determine the resource corresponding to each beam in the first beam set. The reporting method of the terminal device, and the implicit indication rule can be obtained according to the third information.

Step 603, the network device sends a reference signal.

Here, the sending of the reference signal by the network device may include the sending of a first reference signal by the network device through the beam d (the first reference signal is a reference signal for beam failure detection); further, it may also include that the Each beam of the beam sends a reference signal corresponding to each beam, for example, a beam a1 sends a reference signal corresponding to beam a1, and a beam a2 sends a reference signal corresponding to beam a2.

Accordingly, in step 604, the terminal device receives the first reference signal and measures the first reference signal to determine whether a beam failure occurs. After the terminal device determines that a beam failure occurs, if the reporting method of the terminal device is a non-combined resource reporting method, steps 605 to 607 are performed, and if the reporting method of the terminal device is a combined resource reporting method, steps 608 to 610 are performed.

Step 605: The terminal device selects the first recovery beam from the first beam set, and sends a beam recovery request to the network device using the resources corresponding to the first recovery beam.

Step 606: After receiving the beam recovery request sent by the terminal device using the resources corresponding to the first recovery beam, the network device switches to the first recovery beam and sends a beam recovery response to the terminal device.

Step 607, the network device and the terminal device communicate through the first recovery beam.

Step 608: The terminal device selects a second recovery beam from the second beam set and uses the resources corresponding to the second recovery beam to send a beam recovery request to the network device. The second beam set includes the beams in the first beam set And at least one beam outside the first beam set. The second recovery beam may be a beam in the first beam set or a beam outside the first beam set.

Specifically, the terminal device may measure the reference signal corresponding to each beam in the second beam set sent by the network device, and then, according to the measurement result, select the beam with the best quality as the second restored beam. Here, if the beam with the best quality includes multiple beams, the terminal device may randomly select one of the multiple beams as the second recovery beam, or the terminal device may preferentially select the first beam set from the multiple beams. The beam in serves as the second restored beam. Since the terminal device can directly obtain the resources corresponding to the beams in the first beam set based on the first information, and the terminal device only needs to send the beam recovery request through the beams in the first beam set, the terminal device preferentially selects the first beam The beams in the set serve as the second recovery beams, which is beneficial to improve the efficiency of beam recovery.

If the second recovery beam is a beam other than the first beam set, the terminal device may determine the resource corresponding to the second recovery beam based on the implicit indication rule. If the second recovery beam is a beam in the first beam set, the terminal device can directly obtain the resources corresponding to the second recovery beam based on the first information, or the terminal device can also determine the second recovery beam based on the implicit indication rule Corresponding resources. If there are multiple sets of resources corresponding to the second recovery beam, the terminal device may select a set of resources from the multiple sets of resources, and use the selected resources to send a beam recovery request to the network device.

Step 609: After receiving the beam recovery request sent by the terminal device using the resources corresponding to the second recovery beam, the network device returns a beam recovery response to the terminal device. Here, the network device may return the beam recovery response to the terminal device in the manner of FIG. 5a or 5b.

Step 610, the network device and the terminal device communicate through the second recovery beam.

It should be noted that: (1) The step numbers in the first and second embodiments of the present invention are only an example of the execution flow, and do not constitute a limitation on the order of execution of the steps. There is no strict execution order between steps without timing dependencies. (2) The above second embodiment only describes a possible interaction process based on the first embodiment. For specific implementation of each step, reference may be made to the first embodiment, which will not be repeated here.

The above mainly introduces the solutions provided by the embodiments of the present application from the perspective of interaction between the network device and the terminal device. It can be understood that, in order to realize the above-mentioned functions, the network device or the terminal device may include a hardware structure and/or a software module corresponding to each function. Those skilled in the art should easily realize that the present invention can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein. Whether a function is performed by hardware or computer software driven hardware depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

In the case of using an integrated unit (module), FIG. 7 shows a possible exemplary block diagram of the beam recovery device involved in the embodiment of the present application. The device 700 may exist in the form of software. The apparatus 700 may include a processing unit 702 and a communication unit 703. The processing unit 702 is used to control and manage the operation of the device 700. The communication unit 703 is used to support communication between the device 700 and other network entities. Optionally, the communication unit 703 is also called a transceiver unit, and may include a receiving unit and/or a sending unit, which are used to perform receiving and sending operations, respectively. The apparatus 700 may further include a storage unit 701 for storing program codes and data of the apparatus 700.

The processing unit 702 may be a processor or a controller, such as a general-purpose central processing unit (CPU), general-purpose processor, digital signal processing (DSP), application-specific integrated circuit (application-specific integrated) circuits, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of DSP and microprocessor, and so on. The communication unit 703 may be a communication interface, a transceiver, or a transceiver circuit, etc., where the communication interface is collectively referred to, and in a specific implementation, the communication interface may include multiple interfaces. The storage unit 701 may be a memory.

The apparatus 700 may be the terminal device in any of the foregoing embodiments, or may also be a semiconductor chip provided in the terminal device. The processing unit 702 may support the apparatus 700 to perform the actions of the terminal device in the foregoing method examples. Alternatively, the processing unit 702 mainly performs the internal actions of the terminal in the method example, and the communication unit 703 may support communication between the apparatus 700 and the network device. For example, the processing unit 702 is used to support the apparatus 700 to perform step 302 in FIG. 3, step 604 in FIG. 6 (relevant action for determining beam failure), step 605 (relevant action for selecting the first restored beam), step 608 (select (Related actions of the second recovery beam); the communication unit 703 is used to support the device 700 to perform step 303 in FIG. 3, step 602, step 604 in FIG. 6 (action to receive the first reference signal), step 605 (transmission beam recovery Requested action), step 607, step 608 (action to send a beam restoration request), step 610.

Specifically, in an embodiment, the communication unit (specifically, may be a receiving unit) is used to receive first information sent by a network device, and the first information is used to indicate a corresponding one of each beam in the first beam set Resources

The processing unit is configured to, after determining that a beam failure occurs, select a second beam from a second beam set, where the second beam set includes the beams in the first beam set and at least the beams other than the first beam set A beam

The communication unit (specifically may be a sending unit) is used to send a beam recovery request to the network device using resources corresponding to the second beam if the second beam is a beam other than the first beam set The resources corresponding to the second beam include resources corresponding to multiple beams in the first beam set.

In a possible design, the communication unit (which may specifically be a receiving unit) is further configured to receive second information sent by the network device, and the second information is used to indicate the reporting method of the terminal device as Combined resource reporting method.

In a possible design, the communication unit (specifically, may be a receiving unit) is further configured to receive third information sent by the network device, and the third information is used to determine a resource corresponding to the second beam .

In a possible design, the third information is used to determine resources corresponding to the second beam, including: the third information is used to configure a combined beam corresponding to the second beam, and the second beam The corresponding combined beam includes the multiple beams; or, the third information is used to configure an associated beam set of the multiple beams, and the second beam is the intersection of the associated beam sets of the multiple beams Beam; or, in a possible design, the third information is used to determine resources corresponding to the second beam, including: the third information is used to configure the second beam and the plurality of beams The number of the second beam is the value calculated by the preset rule for the number of the multiple beams.

The processing unit is further used to select a group of resources from the plurality of groups of resources; the communication unit (specifically may be a sending unit) is specifically used to send a second beam restoration request to the network device using the selected resources .

In a possible design, the communication unit (specifically may be a receiving unit) is also used to receive beam recovery responses returned by the network device through the multiple beams respectively, and then the communication unit (specifically may be The sending unit and/or the receiving unit) communicate with the network device through the second beam; or, the communication unit (specifically, a receiving unit) is also used to receive the second beam from the network device The returned beam recovery response, and then the communication unit (specifically, a sending unit and/or a receiving unit) can communicate with the network device through the second beam.

The apparatus 700 may also be the network device in any of the foregoing embodiments, or may also be a semiconductor chip provided in the network device. The processing unit 702 may support the apparatus 700 to perform the actions of the network device in the foregoing method examples. Alternatively, the processing unit 702 mainly performs internal actions of the network device in the method example, and the communication unit 703 may support communication between the apparatus 700 and the terminal device. For example, the communication unit 702 is used to support the apparatus 700 to perform step 301, step 304, and step 305 in FIG. 3, and step 601, step 603, step 606, step 607, step 609, and step 610 in FIG.

Specifically, in one embodiment, the communication unit (which may be specifically a sending unit) is used to send first information to a terminal device, where the first information is used to indicate a resource corresponding to each beam in the first beam set ; And, the communication unit (specifically, a receiving unit) is configured to receive a beam restoration request sent by the terminal device using resources corresponding to a second beam, the second beam being a beam other than the first beam set The resources corresponding to the second beam include resources corresponding to multiple beams in the first beam set.

In a possible design, the communication unit (specifically may be a sending unit) is also used to send second information to the terminal device, and the second information is used to indicate that the reporting method of the terminal device is a combination Resource reporting method.

In a possible design, the communication unit (specifically, may be a sending unit) is further configured to send third information to the terminal device, where the third information is used to determine resources corresponding to the second beam.

In a possible design, the third information is used to determine resources corresponding to the second beam, including: the third information is used to configure a combined beam corresponding to the second beam, and the second beam The corresponding combined beam includes the multiple beams; or, the third information is used to configure an associated beam set of the multiple beams, and the second beam is the intersection of the associated beam sets of the multiple beams Beam; or, the third information is used to configure the number of the second beam and the plurality of beams, and the number of the second beam is a value calculated by a preset rule for the number of the plurality of beams.

In a possible design, the communication unit (which may specifically be a receiving unit) is also used to return a first beam recovery response to the terminal device through the multiple beams respectively, and then the communication unit (specifically may Is a receiving unit and/or a sending unit) communicates with the network device through the second beam; or, the communication unit (specifically may be a receiving unit) is also used to send the terminal to the terminal through the second beam The device returns a second beam recovery response, and then the communication unit (specifically, a receiving unit and/or a sending unit) communicates with the network device through the second beam.

It should be noted that the division of units (modules) in the embodiment of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner. The functional modules in the embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules.

If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of the embodiments of the present application may essentially be part of or contribute to the existing technology or all or part of the technical solutions may be embodied in the form of software products, and the computer software products are stored in a storage The medium includes several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) or processor to perform all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

8 shows a schematic structural diagram of an apparatus. The apparatus 800 includes a processor 810, a memory 820, and a transceiver 830. In one example, the device 800 can implement the functions of the device 700 illustrated in FIG. 7, specifically, the functions of the communication unit 703 illustrated in FIG. 7 can be implemented by the transceiver, and the function of the processing unit 702 can be implemented by the processor To achieve, the function of the storage unit 701 may be implemented by a memory. In yet another example, the apparatus 800 may be a network device in the method embodiment, or may also be a terminal device in the above method embodiment, and the apparatus 800 may be used to implement the network device described in the above method embodiment. Or the method of the terminal device, for details, please refer to the description in the above method embodiments.

9 is a schematic structural diagram of a terminal device 900 provided by an embodiment of the present application. For ease of explanation, FIG. 9 shows only the main components of the terminal device. As shown in FIG. 9, the terminal device 900 includes a processor, a memory, a control circuit, an antenna, and input/output devices. The terminal device 900 can be applied to the system architecture shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiments.

The processor is mainly used to process the communication protocol and communication data, and control the entire terminal device, execute a software program, and process data of the software program, for example, to control the terminal device to perform the actions described in the foregoing method embodiments. The memory is mainly used to store software programs and data. The control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The control circuit and the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit processes the baseband signal after radio frequency processing, and then sends the radio frequency signal in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for ease of explanation, FIG. 9 only shows one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc. This embodiment of the present application does not limit this.

As an optional implementation, the processor may include a baseband processor and a central processor. The baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control and execute the entire terminal device. Software program, processing software program data. The processor in FIG. 9 integrates the functions of the baseband processor and the central processor. Those skilled in the art can understand that the baseband processor and the central processor can also be separate processors, which are interconnected by technologies such as a bus. Those skilled in the art may understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processor can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Exemplarily, if the device 700 illustrated in FIG. 7 is a terminal device, in the embodiment of FIG. 9, the antenna and the control circuit with the transceiver function can be regarded as the communication unit of the device 700, and the processor with the processing function It is regarded as the processing unit of the device 700. As shown in FIG. 9, the terminal device 900 includes a communication unit 901 and a processing unit 902. The communication unit 901 may also be called a transceiver, a transceiver, a transceiver device, or the like. Alternatively, the device for realizing the receiving function in the communication unit 901 can be regarded as the receiving unit, and the device for realizing the sending function in the communication unit 901 can be regarded as the sending unit, that is, the communication unit 901 includes the receiving unit and the sending unit. Exemplarily, the receiving unit may also be referred to as a receiver, receiver, receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, transmitter, or transmitting circuit, etc.

The terminal device 900 shown in FIG. 9 can implement various processes related to the terminal device in the method embodiment of FIG. 3 or FIG. 6. The operations and/or functions of each module in the terminal device 900 are respectively for implementing the corresponding processes in the above method embodiments. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

FIG. 10 is a schematic structural diagram of a network device according to an embodiment of the present application, and may be, for example, a schematic structural diagram of a base station. As shown in FIG. 10, the network device 1000 may be applied to the system architecture shown in FIG. 1 to perform the functions of the network device in the above method embodiments.

The network device 1000 may include one or more radio frequency units, such as a remote radio unit (RRU) 1001 and one or more baseband units (BBU) (also called a digital unit (DU) )) 1002.

The RRU 1001 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 1011 and a radio frequency unit 1012. The RRU 1001 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals, for example, for sending the indication information in the above method embodiment. The RRU 1001 and the BBU 1002 may be physically set together, or may be physically separated, that is, distributed base stations.

The BBU 1002 is the control center of the base station, and can also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, and so on. For example, the BBU (processing unit) 1002 may be used to control the base station to perform the operation flow on the network device in the above method embodiments.

In an embodiment, the BBU 1002 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) with a single access indication, or may support different access standards respectively. Wireless access network (such as LTE network, 5G network or other networks). The BBU 1002 also includes a memory 1021 and a processor 1022. The memory 1021 is used to store necessary instructions and data. The processor 1022 is used to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow on the network device in the foregoing method embodiment. The memory 1021 and the processor 1022 may serve one or more single boards. In other words, the memory and processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, each board can also be equipped with necessary circuits.

It should be understood that the network device 1000 shown in FIG. 10 can implement various processes related to the network device in FIG. 3 or FIG. 6. The operations and/or functions of each module in the network device 1000 are respectively set to implement the corresponding processes in the above method embodiments. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

In the implementation process, each step in the method provided in this embodiment may be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an existing programmable gate array (FPGA) or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The processor in the embodiments of the present application may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It can be understood that the memory or storage unit in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electronically Erase programmable EPROM (EEPROM) or flash memory. The volatile memory may be a random access memory (random access memory, RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous RAM), SDRAM), double data rate synchronous dynamic random access memory (double data SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct RAMbus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to these and any other suitable types of memories.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, 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 processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (eg coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more available medium integrated servers, data centers, and the like. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, Solid State Disk (SSD)), or the like.

The various illustrative logic units and circuits described in the embodiments of the present application may be implemented by a general-purpose processor, a digital signal processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices. Discrete gate or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. The general-purpose processor may be a microprocessor, and optionally, the general-purpose processor may also be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration achieve.

The steps of the method or algorithm described in the embodiments of the present application may be directly embedded in hardware, a software unit executed by a processor, or a combination of both. The software unit may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium in the art. Illustratively, the storage medium may be connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Alternatively, the storage medium may also be integrated into the processor. The processor and the storage medium may be provided in the ASIC, and the ASIC may be provided in the terminal device. Optionally, the processor and the storage medium may also be provided in different components in the terminal device.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, which is executed on the computer or other programmable device The instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

Although the embodiments of the present application have been described in conjunction with specific features, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the embodiments of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the embodiments of the present application as defined by the appended claims, and are deemed to cover any and all modifications, changes, combinations, or equivalents within the scope of the embodiments of the present application. Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the embodiments of the present application are also intended to include these modifications and variations.

Claims

A beam failure recovery method, characterized in that the method includes:

The terminal device receives first information sent by the network device, where the first information is used to indicate a resource corresponding to each beam in the first beam set;

After determining that a beam failure occurs, the terminal device selects a second beam from a second beam set, where the second beam set includes the beam in the first beam set and at least one beam other than the first beam set;

If the second beam is a beam other than the first beam set, the terminal device sends a beam recovery request to the network device using resources corresponding to the second beam, and the resources corresponding to the second beam include Resources corresponding to multiple beams in the first beam set.
The method according to claim 1, wherein before the terminal device selects the second beam from the second beam set, the method further comprises:

The terminal device receives second information sent by the network device, where the second information is used to indicate that the reporting method of the terminal device is a combined resource reporting method.
The method according to claim 1 or 2, wherein the method further comprises:

The terminal device receives third information sent by the network device, where the third information is used to determine a resource corresponding to the second beam.
The method according to claim 3, wherein the third information used to determine the resource corresponding to the second beam includes:

The third information is used to configure a combined beam corresponding to the second beam, and the combined beam corresponding to the second beam includes the multiple beams; or,

The third information is used to configure an associated beam set of the multiple beams, and the second beam is a beam in an intersection of the associated beam sets of the multiple beams; or,

The third information is used to configure the number of the second beam and the plurality of beams, and the number of the second beam is a value calculated by a preset rule for the number of the plurality of beams.
The method according to any one of claims 1 to 4, wherein the second beam corresponds to multiple sets of resources;

Sending, by the terminal device, a second beam recovery request to the network device using resources corresponding to the second beam, including: the terminal device selecting a group of resources from the plurality of groups of resources, and using the selected resources to The network device sends a second beam recovery request.
The method according to any one of claims 1 to 5, wherein after the terminal device uses the resource corresponding to the second beam to send the second beam recovery request to the network device, the method further includes:

After receiving the beam recovery responses returned by the network device through the multiple beams, the terminal device communicates with the network device through the second beam; or,

After receiving the beam recovery response returned by the network device through the second beam, the terminal device communicates with the network device through the second beam.
A beam failure recovery method, characterized in that the method includes:

The network device sends first information to the terminal device, where the first information is used to indicate a resource corresponding to each beam in the first beam set;

The network device receives a beam recovery request sent by the terminal device using resources corresponding to a second beam, the second beam is a beam other than the first beam set, and the resources corresponding to the second beam include the first Resources corresponding to multiple beams in a beam set.
The method according to claim 7, wherein the method further comprises:

The network device sends second information to the terminal device, where the second information is used to indicate that the reporting method of the terminal device is a combined resource reporting method.
The method according to claim 7 or 8, wherein the method further comprises:

The network device sends third information to the terminal device, where the third information is used to determine resources corresponding to the second beam.
The method according to claim 9, wherein the third information used to determine the resource corresponding to the second beam includes:

The third information is used to configure a combined beam corresponding to the second beam, and the combined beam corresponding to the second beam includes the multiple beams; or,

The third information is used to configure an associated beam set of the multiple beams, and the second beam is a beam in an intersection of the associated beam sets of the multiple beams; or,

The third information is used to configure the number of the second beam and the plurality of beams, and the number of the second beam is a value calculated by a preset rule for the number of the plurality of beams.
The method according to any one of claims 7 to 10, wherein the method further comprises:

After the network device returns the first beam recovery response to the terminal device through the multiple beams, respectively, communicates with the network device through the second beam; or,

After returning the second beam recovery response to the terminal device through the second beam, the network device communicates with the terminal device through the second beam.
A beam recovery device, characterized in that the beam recovery device includes a sending unit, a receiving unit and a processing unit;

The receiving unit is configured to receive first information sent by a network device, where the first information is used to indicate a resource corresponding to each beam in the first beam set;

The processing unit is configured to select a second beam from a second beam set after determining that a beam failure occurs, the second beam set includes at least one beam in the first beam set and at least one of the first beam set A beam

The sending unit is configured to: if the second beam is a beam other than the first beam set, use a resource corresponding to the second beam to send a beam recovery request to the network device, and the second beam corresponds to The resources of include resources corresponding to multiple beams in the first beam set.
The apparatus according to claim 12, wherein the receiving unit is further configured to receive second information sent by the network device, and the second information is used to indicate that the reporting mode of the beam recovery apparatus is combination Resource reporting method.
The apparatus according to claim 12 or 13, wherein the receiving unit is further configured to receive third information sent by the network device, and the third information is used to determine a resource corresponding to the second beam .
The method according to any one of claims 12 to 14, wherein the receiving unit is further configured to receive beam restoration responses returned by the network device through the multiple beams, respectively, or to receive the The network device returns the beam recovery response through the second beam;

The sending unit and/or the receiving unit are further configured to communicate with the network device through the second beam.
A beam recovery device, characterized in that the beam recovery device includes a sending unit and a receiving unit;

The sending unit is configured to send first information to the terminal device, where the first information is used to indicate a resource corresponding to each beam in the first beam set;

The receiving unit is configured to receive a beam restoration request sent by the terminal device using resources corresponding to a second beam, the second beam is a beam other than the first beam set, and the resources corresponding to the second beam include Resources corresponding to multiple beams in the first beam set.
The apparatus according to claim 16, wherein the sending unit is further configured to send second information to the terminal device, where the second information is used to indicate that the reporting method of the terminal device is combined resource reporting the way.
The apparatus according to claim 16 or 17, wherein the sending unit is further configured to send third information to the terminal device, where the third information is used to determine a resource corresponding to the second beam.
The apparatus according to any one of claims 16 to 18, wherein the sending unit is further configured to return the first beam recovery response to the terminal device through the multiple beams, respectively, or The second beam returns a second beam recovery response to the terminal device;

The sending unit and/or the receiving unit are also used to communicate with the terminal device through the second beam.
A computer-readable storage medium, characterized by comprising instructions which, when run on a computer, cause the computer to execute the method according to any one of claims 1 to 11.