CN111385890A

CN111385890A - Beam failure recovery method and device

Info

Publication number: CN111385890A
Application number: CN201811642479.3A
Authority: CN
Inventors: 刘湘蒲; 刘坤鹏; 向高; 田廷剑
Original assignee: Chengdu Huawei Technology Co Ltd
Current assignee: Chengdu Huawei Technology Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-07-07
Anticipated expiration: 2038-12-29
Also published as: CN111385890B; WO2020134984A1

Abstract

The application relates to the technical field of communication and discloses a beam failure recovery method and device. The method comprises the following steps: the method comprises the steps that terminal equipment receives first information sent by network equipment, wherein the first information is used for indicating resources corresponding to each wave beam in a first wave beam set; and after determining that the beam fails to occur, the terminal equipment selects a second beam from the second beam set, and if the second beam is a beam other than the first beam set, the terminal equipment sends a beam recovery request to the network equipment by using a resource corresponding to the second beam, wherein the resource corresponding to the second beam comprises resources corresponding to a plurality of beams in the first beam set. By adopting the method, the terminal equipment can use the resources corresponding to the plurality of beams in the first beam set to send the beam recovery request to the network equipment, namely, the beam recovery is indicated in an implicit indication mode, so that the possibility of successful beam recovery can be greatly improved.

Description

Beam failure recovery method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for recovering a beam failure.

Background

In the 5th generation (5G) system, a higher carrier frequency (generally, greater than 6GHz or more) than that of Long Term Evolution (LTE) is adopted, such as a frequency band of 28GHz, 38GHz, or 72GHz, to implement wireless communication with a larger bandwidth and a higher transmission rate. Due to the higher carrier frequency, the transmitted wireless signal experiences more severe fading during the spatial propagation process, and even the wireless signal is difficult to detect at the receiving end. Therefore, in the 5G system, a Beamforming (BF) technique is used to obtain a beam with good directivity, so as to increase antenna gain, increase power in the transmission direction, and improve signal to interference plus noise ratio (SINR) at the receiving end.

In the communication process of the network device and the terminal device, since both the network device and the terminal device need to perform beamforming, beam alignment is required to maintain link quality. However, when a shielding (such as a human body, a vehicle, a building, etc.) occurs during the transmission of the wireless signal, or a reflector of the wireless signal changes, or the wireless signal is switched from line of sight (los) to non-line of sight (nlos) (non-line of light), misalignment may occur between beams of the network device and the terminal device that are originally aligned with each other, so that the quality of the link may be rapidly degraded or interrupted, and the terminal device may fail to enter the link (RLF).

In order to avoid frequent RLF caused by beam misalignment, the 5G system introduces a Beam Failure Recovery (BFR) technique, which supports completion of beam recovery before link failure to shorten link outage time. Further research is still needed for the specific implementation of beam failure recovery.

Disclosure of Invention

The application provides a beam failure recovery method and device, which are used for improving the probability of successful beam recovery.

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

the method comprises the steps that terminal equipment receives first information sent by network equipment, wherein the first information is used for indicating resources corresponding to each wave beam in a first wave 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 a beam in the first beam set and at least one beam outside 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 a resource corresponding to the second beam, where the resource corresponding to the second beam includes resources corresponding to multiple beams in the first beam set.

By adopting the method, on one hand, the terminal equipment can select the recovery beam from the second beam set after determining that the beam fails to occur, and compared with the method that the recovery beam can be selected only from the first beam set, the method expands the selection range of the recovery beam and 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 send a beam recovery request to the network device using resources corresponding to multiple beams in the first beam set, that is, the recovery beam is indicated in an implicit indication manner, so that resources corresponding to each beam in the first beam set configured by the network device can be used for not only reporting the beam in the first beam set, but also implicitly reporting the beam other than the first beam set, thereby greatly improving the probability of successful beam recovery.

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

and the terminal equipment receives second information sent by the network equipment, wherein the second information is used for indicating that the reporting mode of the terminal equipment is a combined resource reporting mode.

Therefore, the terminal device can determine the reporting mode of the terminal device based on the second information sent by the network device.

In one possible design, the method further includes: and the terminal equipment receives third information sent by the network equipment, wherein the third information is used for determining resources corresponding to the second beam.

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

In one possible design, the third information is used to determine a resource corresponding to the second beam, and includes: the third information is used for configuring a combined beam corresponding to the second beam, where the combined beam corresponding to the second beam includes the plurality of beams.

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

In one possible design, the third information is used to determine a resource corresponding to the second beam, and includes: the third information is used to configure an associated set of beams of the plurality of beams, and the second beam is a beam in an intersection of the associated set of beams of the plurality of beams.

In this way, according to the associated beam set of the multiple beams, if it is determined that the second beam is a beam in the intersection of the associated beam set of the multiple beams, the terminal device may determine that the resource corresponding to the second beam includes resources corresponding to the multiple beams.

In one possible design, the third information is used to determine a resource corresponding to the second beam, and includes: the third information is used for configuring the second beam and the numbers of the plurality of beams, and the number of the second beam is a value calculated by a preset rule according to the numbers of the plurality of beams.

In this way, the terminal device may determine that the resource corresponding to the second beam includes the resources corresponding to the multiple beams, if it is determined that the number of the second beam is the value calculated by the preset rule according to the number of the second beam and the multiple beams.

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

the terminal device sends a second beam recovery request to the network device by using the resource corresponding to the second beam, including: the terminal device selects a set of resources from the plurality of sets of resources and transmits a second beam recovery request to the network device using the selected resources.

Therefore, the second beam corresponds to multiple groups of resources, so that when the terminal device reports the second beam, a group of appropriate resources can be selected from multiple resources to send the beam recovery request, for example, a resource corresponding to a beam with better quality can be selected to send the beam recovery request, thereby facilitating the network device to receive the beam recovery request sent by the terminal device.

In one possible design, after the terminal device sends the second beam recovery request to the network device using the resource corresponding to the second beam, the method further includes:

after receiving the beam recovery responses returned by the network device through the plurality of beams respectively, the terminal device communicates with the network device through the second beam; alternatively, the first and second electrodes may be,

and after receiving the beam recovery response returned by the network equipment through the second beam, the terminal equipment communicates with the network equipment through the second beam.

In a second aspect, the present application provides a beam failure recovery method, including:

the method comprises the steps that network equipment sends first information to terminal equipment, wherein the first information is used for indicating resources corresponding to each wave beam in a first wave beam set;

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

In one possible design, the method further includes: and the network equipment sends second information to the terminal equipment, wherein the second information is used for indicating that the reporting mode of the terminal equipment is a combined resource reporting mode.

In one possible design, the method further includes: and the network equipment sends third information to the terminal equipment, wherein the third information is used for determining resources corresponding to the second beam.

In one possible design, the method further includes:

the network device returns a first beam recovery response to the terminal device through the plurality of beams, and then communicates with the network device through the second beam; alternatively, the first and second electrodes may be,

after returning a second beam recovery response to the terminal device through the second beam, the network device communicates with the network device through the second beam; by adopting the mode, the network equipment returns the beam recovery response to the terminal equipment after determining the second beam, so that the transmission resource can be effectively saved; and the terminal equipment does not need to monitor the wave beam recovery response in the response monitoring time window of the previous plurality of wave beams, so that the wave beam failure recovery process can be accelerated, and the wave beam failure recovery efficiency is improved.

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

In a fourth aspect, the present application is directed to an apparatus comprising: a processor and a memory; the memory is configured to store computer executable instructions, and when the apparatus is running, the processor executes the computer executable instructions stored by the memory, so as to cause the apparatus to perform the method performed by the terminal device according to the first aspect or the first aspect, or to cause the apparatus to perform the method performed by the network device according to the second aspect or the second aspect.

In a fifth aspect, the present application further provides a communication system comprising the terminal device in any of the designs of the first aspect and the network device in any of the designs of the second aspect.

In a sixth aspect, the present application also provides a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the method of the above aspects.

In a seventh aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

Fig. 1 is a schematic architecture diagram of a possible communication system to which the embodiment of the present application is applicable;

fig. 2a and fig. 2b are schematic diagrams of beam failure recovery of a network device and a terminal device.

Fig. 3 is a flowchart illustrating a corresponding beam failure recovery method according to an embodiment of the present application;

FIG. 4a is an example of implicit indication rules provided by an embodiment of the present application;

FIG. 4b is a diagram of another example of an implicit indication rule provided by an embodiment of the present application;

FIG. 4c is a further example of implicit indication rules provided by embodiments of the present application;

fig. 5a is an example of a return beam recovery response of a network device according to an embodiment of the present application;

fig. 5b is a further example of a return beam recovery response of a network device according to the embodiment of the present application;

fig. 6 is an overall flow interaction diagram of a beam failure recovery method according to a second embodiment of the present application;

FIG. 7 is a possible exemplary block diagram of the devices involved in the embodiments of the present application;

fig. 8 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

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

First, some terms in the embodiments of the present application are explained so as to be easily understood by those skilled in the art.

(1) The terminal equipment: the device with the wireless transceiving function can be deployed on land, and comprises an indoor or outdoor device, a handheld device, a wearable device or a vehicle-mounted device; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. A terminal device may also be sometimes referred to as a User Equipment (UE), an access terminal device, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus, etc.

(2) A network device: may be a device, such as a base station or base station controller, etc., that communicates with the terminal device. A network device may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area (cell). The network device may be a base station (BTS) in a global system for mobile communications (GSM) system or Code Division Multiple Access (CDMA) system, a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved node b (eNB or eNodeB) in an LTE system, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network, for example, a base station (NB) or a receiving point (BTS or receiving point) in a new radio Network (NR), or a public mobile network (terrestrial) or a future mobile network, PLMN) network device in the network, etc., and the embodiments of the present application are not limited.

(3) Beam (beam): one of the main problems of high frequency communication is that signal energy drops sharply with transmission distance, resulting in short signal transmission distance. In order to overcome the problem, the high-frequency communication adopts an analog beam technology, the weighting processing is carried out through a large-scale antenna array, the signal energy is concentrated in a smaller range, and a signal (called an analog beam, called a beam for short) similar to a light beam is formed, so that the transmission distance is increased.

A beam is a communication resource and may be a wide beam, a narrow beam, or other type of beam. The technique of forming the beam may be a beamforming technique or other technical means. The beamforming techniques may be embodied as digital beamforming techniques, analog beamforming techniques, hybrid digital/analog beamforming techniques, and the like. Different beams may be considered different communication resources and the same information or different information may be transmitted through different beams. Alternatively, a plurality of beams having 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, sounding signals, and the like. It is to be understood that the one or more antenna ports forming a beam, which may also be referred to as spatial filter (spatial filter), may also be regarded as a set of antenna ports. The beam includes a transmitting beam and a receiving beam, the transmitting beam may refer to the distribution of signal strength formed in different spatial directions after the signal is transmitted by the antenna, and the receiving beam may refer to the distribution of the antenna array to strengthen or weaken the reception of the wireless signal in different spatial directions. In the embodiment of the present application, for example, the network device sends the beam recovery response through the transmit beam x1, and accordingly, the terminal device may receive the beam recovery response through the receive beam x2, in which case, the transmit beam x1 and the receive beam x2 may be understood as a beam pair. It should be noted that, in the embodiment of the present application, a transmission beam and a reception beam are not explicitly distinguished, and the transmission beam x1 and the reception beam x2 may be collectively referred to as a beam x, so it can be understood that the network device sends a beam recovery response through the beam x, and accordingly, the terminal device may receive the beam recovery response through the beam x.

In current NR protocols, beams can be represented by a quasi co-location (QCL) relationship with antenna ports. Specifically, the two co-beamformed signals have a QCL relationship with respect to Spatial Rx parameters, i.e., QCL-Type D in the protocol. The beam may be specifically represented by identification of various signals in the protocol, such as a resource index of a channel state information reference signal (CSI-RS), an index of a synchronization signal broadcast channel block (SS/PBCH block, which may also be abbreviated as SSB), a resource index of a Sounding Reference Signal (SRS), and a resource index of a Tracking Reference Signal (TRS).

In addition, in general, one beam corresponds to one DMRS port or one Transmission Configuration Index (TCI) or one TRP or one sounding reference Signal Resource Indicator (SRI) (for uplink data transmission), and thus, different beams may also be represented by different DMRS ports or TCIs or TRPs or SRIs.

Since the DMRS port, the TCI, the TRP, the SRI, the resource index of the CSI-RS, the index of the SS/PBCH block, the resource index of the SRS, and the resource index of the TRS may all represent a beam. Therefore, the DMRS port and TCI hereinafter may also be replaced by a beam, a TRP, an SRI, a resource index of a CSI-RS, an index of an SS/PBCH block, a resource index of an SRS, or a resource index of a TRS, and the replacement does not change the essence of the method provided by the embodiments of the present application.

(4) Antenna port (antenna port): an antenna port is a logical concept, and one antenna port may correspond to one physical transmitting antenna or a plurality of physical transmitting antennas. In both cases, the receiver (receiver) of the terminal does not resolve the signals coming from the same antenna port. Since, from the perspective of the terminal, whether the channel is formed by a single physical transmit antenna or is formed by combining multiple physical transmit antennas, the reference signal corresponding to the antenna port defines the antenna port, for example, the antenna port corresponding to the demodulation reference signal (DMRS), i.e., the DMRS port, the terminal can obtain the channel estimate of the antenna port according to the reference signal. Each antenna port corresponds to a time/frequency resource grid (time/frequency resource grid) and has its own reference signal. One antenna port is a channel, and the terminal needs to perform channel estimation and data demodulation according to a reference signal corresponding to the antenna port.

(5) Beam management resources: refers to resources used for beam management, which in turn may be embodied as resources used for computing and measuring the quality of the beam. Specifically, the beam management resource may include a Synchronization Signal (SS), a Synchronization Signal Block (SSB), a synchronization broadcast signal block (SS/PBCH block) broadcast channel, a broadcast channel demodulation reference signal, a tracking reference signal, a downlink channel measurement reference signal, a downlink control channel demodulation reference signal, a downlink shared channel demodulation reference signal, an uplink sounding reference signal, an uplink random access signal, and the like.

(6) Beam indication information: indicating 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 beam index, a relative beam index, a beam logical index, an antenna port index corresponding to a beam, an antenna port group index corresponding to a beam, a downlink signal index corresponding to a beam, a time index of a downlink synchronization signal block corresponding to a beam, beam pair connection (BPL) information, a beam corresponding transmit parameter (Tx parameter), a beam corresponding receive parameter (Rxparameter), a beam corresponding transmit weight, a beam corresponding weight matrix, a beam corresponding weight vector, a beam corresponding receive weight, a beam corresponding transmit weight index, a beam corresponding weight matrix index, a beam corresponding weight vector index, a beam corresponding receive weight index, a beam corresponding transmit weight index, a beam absolute beam, The downlink signal comprises any one of a synchronization signal, a broadcast channel, a broadcast signal demodulation signal, a CSI-RS (channel state information-reference signal), a cell specific reference signal (CS-RS), a UE specific reference signal (US-RS), a downlink control channel demodulation reference signal, a downlink data channel demodulation reference signal and a downlink phase noise tracking signal. The uplink signal comprises any one of an 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 further assign QCL identifiers to beams having quasi-co-location (QCL) relationships among beams associated with the frequency resource groups. The beam indication information may also be embodied as a Transmission Configuration Index (TCI), and the TCI may include various parameters, such as a cell number, a bandwidth part number, a reference signal identifier, a synchronization signal block identifier, a QCL type, and the like.

(7) The various numbers of the first, second, etc. mentioned in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application, nor to indicate the sequence. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. "at least one" means one or more. At least two means two or more. "at least one," "any," or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one (one ) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

Fig. 1 is a schematic architecture diagram of a possible communication system to which the embodiment of the present application is applicable. The communication system shown in fig. 1 includes a network device and a terminal device. It should be understood that fig. 1 is only an architecture diagram of a communication system, the number of network devices and the number of terminal devices in the communication system are not limited in this embodiment, and the communication system to which this embodiment of the present application is applied may include other devices, such as a core network device, a wireless relay device, a wireless backhaul device, and the like, besides the network devices and the terminal devices, and this embodiment of the present application is also not limited. In addition, the network device in the embodiment of the present application may integrate all functions into one independent physical device, or may distribute the functions over a plurality of independent physical devices, which is not limited to the 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 to which the above system architecture is applicable may be various Radio Access Technology (RAT) systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000(IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. Furthermore, the communication system may also be adapted for future oriented communication technologies.

The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the communication system architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In the architecture illustrated in fig. 1, the network device and the terminal device may communicate through beamforming technology. However, when a beam failure occurs (e.g., due to a beam misalignment between the network device and the terminal device caused by sudden channel fluctuation, unexpected obstacle interruption, terminal device rotation, etc.), the terminal device will not be able to decode any Downlink (DL) signal and/or the network device will not be able to decode any Uplink (UL) signal, thereby causing the terminal device to fall into RLF. One possible solution to this problem that has been proposed is to avoid frequent RLFs due to beam failures by beam failure recovery.

The main principle of the beam failure recovery is as follows: and the network equipment or the terminal equipment adjusts the beams with failures to other available beams according to the beam measurement results, thereby avoiding frequent RLF caused by the beam failures. In particular, a beam failure event may be detected by the terminal device, and since the terminal device is able to make beam measurements and learn the latest beam quality measurement, the beam failure recovery procedure may also be triggered by the terminal device.

The third generation partnership project (3 GPP) release 15(R15) specifies that beam failure recovery may be achieved through a non-contention based random access procedure. Specifically, after determining that a beam failure occurs, the terminal device may select an available beam from a candidate beam list (candidate beam list) configured by the network device as a recovery beam, and report the recovery beam to the network device using a Random Access Channel (RACH) resource corresponding to the recovery beam, so that the network device switches to the recovery beam to communicate with the terminal device. Further, the protocol also specifies that the maximum value of the number of beams in the candidate beam list and their corresponding RACH resources is 16 (specifically, maxnrof candidatebeams is 16), that is, the network device can only select 16 beams as the candidate beam list and configure the RACH resources corresponding to 16 beams, and the terminal device can only select available beams from the 16 beams and report the available beams to the network device through the RACH resources corresponding to the available beams, so that the beam failure recovery can be realized.

However, in practical applications, the number of beams corresponding to the entire antenna is generally greater than 16, and when an actually available beam is not located in the candidate beam list pre-configured by the network device, the network device does not configure the RACH resource corresponding to the available beam for the terminal device, so that the terminal device cannot report the available beam, and finally, the beam failure recovery cannot be completed. For example, referring to the scenario illustrated in fig. 2a and 2b, the beam currently communicated by the network device and the terminal device is the beam 17, and at this time, another beam 38 may be used as the recovery beam. When occlusion occurs, the terminal device detects that the quality of the beam 17 is degraded, and needs to switch to the beam 38 through beam failure recovery, but the 16 candidate beam lists configured in advance by the network device do not include the beam 38, the terminal device cannot report the beam 38 to the network device because there is no corresponding RACH resource, and a beam (for example, the beam 30) in the candidate beam list is configured with a corresponding RACH resource, but reporting failure or low reported beam quality may occur, so that beam failure recovery cannot be completed.

As can be seen from the above, since the protocol specifies the maximum number (i.e. 16) of beams and their corresponding RACH resources in the candidate beam list in beam failure recovery, the candidate beam list may not cover all beams of the network device, and when a recovered beam is not located in the candidate beam list configured by the network device, the terminal device may not report the recovered beam to the network device, thereby causing a failure of beam recovery.

Based on this, an embodiment of the present application provides a beam failure recovery method, which is used to solve a technical problem of beam recovery failure caused by a recovery beam not being located in an alternative beam list configured by a network device, so as to improve a probability of beam recovery success.

Example one

Fig. 3 is a flowchart illustrating a corresponding beam failure recovery method according to an embodiment of the present application, as shown in fig. 3, including:

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

Here, the network device may transmit the first information to the first terminal device in various manners, for example, the network device may transmit the first information to the terminal device through Radio Resource Control (RRC) signaling, media access control (MAC CE) or Downlink Control Information (DCI) by using a downlink resource or channel such as a broadcast channel, a system message update, a paging message, a downlink control channel, a downlink data channel, or a downlink shared channel.

In one example, the first information may include a first beam set and a resource corresponding to each beam in the first beam set. One or more beams may be included in the first set of beams, for example, 16 beams may be included in the first set of beams (in this case, the first set of beams may also be understood as the above-described alternative beam list). 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 transmitting RACH through the beam, a time-frequency resource location, and the like. As shown in table 1, there is an example of a resource corresponding to each beam in the first set of beams.

Table 1: resource examples corresponding to each beam in the first beam set

Beam indication information	RACH resource corresponding to wave beam
		Beam a1	RACH resource b1
Beam a2	RACH resource b2
		……	……
Beam a16	RACH resource b16

As can be seen from table 1, the first beam set includes 16 beams, and exemplarily, the resource corresponding to the beam a1 is RACH resource b1, that is, if the terminal device determines that the beam a1 is a recovery beam, the beam a1 may be reported to the network device using RACH resource b 1; the resource corresponding to the beam a2 is RACH resource b2, that is, if the terminal device determines that the beam a2 is a recovery beam, the beam a2 may be reported to the network device using RACH resource b 2.

In this embodiment, the network device may further 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 decision threshold (available for beam failure decision). The following specifically introduces the beam management resource information and the decision threshold, respectively.

(1) Beam management resource information

The beam management resource information may include information of one or more reference signals (CSI-RS or SSB), and for example, the beam management resource information includes information of the first reference signal, the information of the first reference signal may include an identification of the first reference signal (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, number of ports, period, and offset, etc.).

Accordingly, after receiving the beam management resource information, the terminal device may measure the first reference signal sent by the network device through the beam d according to the information of the first reference signal, so as to obtain the quality of the beam d. Furthermore, the terminal device may compare the quality of the beam d with a decision threshold, and if the quality of the beam d is higher than or equal to the decision threshold, it indicates that the beam d is normal, and if the quality of the beam d is lower than the decision threshold, it indicates that the beam d fails, and then step 302 may be executed.

(2) Decision threshold

There are various metrics for measuring the quality of a beam, for example, possible metrics include one or more of the following: reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), reference signal received strength indicator (RSSI), signal to interference and noise ratio (SINR), Channel Quality Indicator (CQI), Rank Indicator (RI), Precoding Matrix Indicator (PMI), and block error rate (block error rate). Accordingly, the decision threshold may be varied.

Specifically, if the measurement indicator of the quality of the beam 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 measure the first reference signal 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 indicator of the first reference signal. In this embodiment of the present application, if the decision threshold is set by taking the reference signal received power as a measurement unit, the terminal device may measure the first reference signal to obtain the reference signal received power of the first reference signal, so as to compare the reference signal received power of the first reference signal with the decision threshold; if the first threshold is set by taking the reference signal receiving quality as a measurement unit, the terminal equipment measures the first reference signal to obtain the reference signal receiving quality of the first reference signal so as to compare the reference signal receiving quality of the first reference signal with the judgment threshold; if the first threshold is set by taking the reference signal received strength indication as a measurement unit, the terminal device measures the first reference signal to obtain the reference signal received strength indication of the first reference signal, so as to compare the reference signal received strength indication of the first reference signal with the decision threshold. Other situations are similar and will not be described 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 a beam in the first beam set and at least one beam outside the first beam set, that is, the first beam set is a subset of the second beam set.

In this embodiment of the application, before the terminal device selects the second beam from the second beam set, the method may further include: the network equipment sends second information to the terminal equipment, wherein the second information is used for indicating that the reporting mode of the terminal equipment is a combined resource reporting mode; correspondingly, the terminal equipment receives the second information and determines to adopt a combined resource reporting mode to report the recovery beam. For example, the network device may send the second information to the terminal device through RRC signaling, MAC CE, or DCI by using a broadcast channel, a system message update, a paging message, a downlink control channel, a downlink data channel, or a downlink shared channel, or other downlink resources or channels.

The specific implementation manner of the reporting manner of the indication terminal device may be various. In an example, the indication may be performed by a 1-bit identifier, for example, "1" indicates a combined resource reporting manner, and may be exemplarily indicated as combined RACH flag ═ 1; "0" indicates a non-combined resource reporting mode, and may be indicated as combined rach flag being 0, for example. Or "0" represents a combined resource reporting mode, and "1" represents a non-combined resource reporting mode. In another example, an Information Element (IE), such as a BFR-combined RACH, may be added to an RRC signaling, a MAC CE, or a DCI, where a value is on/off, where on represents a combined resource reporting mode, and off represents a non-combined resource reporting mode. In another example, an IE, such as a BFR-conditional Beam RACH-type, may be added to the RRC signaling, the MAC CE, or the DCI, where the IE is used to explicitly indicate two or more reporting modes, for example, the BFR-conditional Beam RACH-type indicates a non-combined resource reporting mode, and the BFR-conditional Beam RACH-type indicates a combined resource reporting mode. It should be noted that, the combined resource reporting mode is the reporting mode provided in the embodiment of the present application, and the non-combined resource reporting mode may be configured to report each beam by using the resource corresponding to each beam in the alternative beam list mentioned above.

The main idea of the combined resource reporting mode is as follows: for beams other than the first beam set (i.e., the candidate beam list), the beams may be reported using resources corresponding to two or more beams in the first beam set. When the combined resource reporting mode is adopted, the terminal device may report a beam other than the first beam set to the network device, and therefore, after the beam occurs, the terminal device may select any available beam (for example, 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 sends a beam recovery request (i.e., reporting the second beam) to the network device using a resource corresponding to the second beam, where the resource corresponding to the second beam includes resources corresponding to multiple beams in the first beam set (the reporting manner described here is a combined resource reporting manner).

Accordingly, in step 304, the network device receives the beam recovery request transmitted by the terminal device using the resource corresponding to the second beam.

In this embodiment, the terminal device may determine, based on the third information, a resource corresponding to the second beam. The third information may be determined by the network device and sent to the terminal device, for example, the network device may send the third information to the terminal device through RRC signaling, MAC CE, or DCI, using a broadcast channel, a system message update, a paging message, a downlink control channel, a downlink data channel, or a downlink shared channel, or other downlink resources or channels.

In one example, the third information may be used to configure a combined beam for each beam in the second set of beams (including a combined beam for the second beam) other than the first set of beams, the combined beam for each beam including at least two beams in the first set of beams. In this embodiment, the network device may configure, according to information such as a spatial position relationship of the beams, a design index of beam gain/shape, and the like, a combined beam corresponding to each beam in the second beam set except for the first beam set, which is not limited specifically. Taking the second beam as an example, the resource corresponding to the second beam may include a resource 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 groups of combined beams, and correspondingly, the resource corresponding to the second beam may also include one or more groups of resources.

For example, referring to fig. 4a, beam a1, beam a2, beam a3, and beam a4 are beams in the first set of beams, and beam c is a beam other than the first set of beams. The combined beam corresponding to the beam c includes a plurality of groups of combined beams, for example, 4 groups of combined beams, which are: (1) beam a1 and beam a2, (2) beam a3 and beam a4, (3) beam a1 and beam a3, and (4) beam a2 and beam a 4. If the combined beam corresponding to the beam c includes the beam a1 and the beam a2, the resource corresponding to the beam c includes RACH resource b1 and RACH resource b 2; if the combined beam corresponding to the beam c includes the beam a2 and the beam a4, the resource corresponding to the beam c includes the RACH resource b2 and the RACH resource b4, and the other cases are similar and are not listed. That is, the resources corresponding to the beam c include 4 sets of resources, which are: (1) RACH resource b1 and RACH resource b2, (2) RACH resource b3 and RACH resource b4, (3) RACH resource b1 and RACH resource b3, and (4) RACH resource b2 and RACH resource b 4.

In the above example, the case that the third information is used to configure a combined beam corresponding to each beam in the second beam set except for the first beam set (i.e. a combined beam corresponding to the first beam set is not configured) is mainly described, and it is to be understood that the third information may also configure a combined beam corresponding to each beam in the second beam set (i.e. a combined beam corresponding to the first beam set may also be configured), for example, the combined beam corresponding to the beam a1 may include the beam a5 and the beam a 6. In this implementation manner, when configuring the combined beam corresponding to each beam in the second beam set, the network device may configure the combined beam corresponding to each beam according to the same rule without considering whether the beam is the beam in the first beam set. Further, if the terminal device selects the beam a1 as the recovery beam, and there are two sets of beams corresponding to the beam a1 at this time, which are (1) RACH resource b1, (2) RACH resource b5 (a resource corresponding to the beam a 5) and RACH resource b6 (a resource corresponding to the beam a 6), the terminal device may report the beam a1 using RACH resource b1, or may report the beam a1 using RACH resource b5 and RACH resource b 6.

In yet another example, the third information may be used to configure an associated set of beams of the plurality of beams in the first set of beams, for example, beam a1, the associated set of beams of beam a1 may include at least one of beam a1 and the second set of beams. For example, the first beam set includes 16 beams, and the third information may be used to configure an associated beam set of each beam of M (M is less than or equal to 16) beams, where a value of M may be set according to actual needs. In this embodiment, the network device may configure an associated beam set of multiple beams in the first beam set according to information such as a spatial position relationship of the beams, a design index of a beam gain/shape, and the like, for example, taking the beam a1 as an example, the network device may configure upper, lower, left, and right 4 beams adjacent to the beam a1 and the beam a1 as the associated beam set of the beam a 1.

For example, referring to fig. 4b, beam a1, beam a2, beam a3, and beam a4 are beams in the first set of beams, and beam c1, beam c2, beam c3, and beam c4 are beams outside the first set of beams. The associated set of beams of beam a1 includes beam a1, beam a5, beam a6, beam c1, and beam c2, the associated set of beams of beam a2 includes beam a2, beam a7, beam a8, beam c1, and beam c3, the associated set of beams of beam a3 includes beam a3, beam a9, beam a10, beam c2, and beam c4, and the associated set of beams of beam a4 includes beam a4, beam a11, beam a12, beam c3, and beam c 4. As can be seen, beam c1 is a beam in the intersection of the associated beam set of beam a1 and the associated beam set of beam a2, and thus, the resources corresponding to beam c1 include RACH resource b1 and RACH resource b 2; beam c2 is a beam in the intersection of the associated beam set of beam a1 and the associated beam set of beam a3, and as such, the resources corresponding to beam c2 include RACH resource b1 and RACH resource b 3; beam c3 is a beam in the intersection of the associated beam set of beam a2 and the associated beam set of beam a4, and as such, the resources corresponding to beam c3 include RACH resource b2 and RACH resource b 4; beam c4 is a beam in the intersection of the associated beam set of beam a3 and the associated beam set of beam a4, and as such, the resources corresponding to beam c4 include RACH resource b3 and RACH resource b 4.

It should be noted that, in a possible scenario, the value of M may be related to the number of beams in the second beam set except for the first beam set, for example, the first beam set includes the beam a1 to the beam a16, and the second beam set includes the beam a1 to the beam a16 and the beam c1 to the beam c4 (that is, the number of beams in the second beam set except for the first beam set is 4). Thus, referring to fig. 4b, since the beam c1 is a beam in the intersection of the associated beam set of the beam a1 and the associated beam set of the beam a2, the beam c2 is a beam in the intersection of the associated beam set of the beam a1 and the associated beam set of the beam a3, the beam c3 is a beam in the intersection of the associated beam set of the beam a2 and the associated beam set of the beam a4, and the beam c4 is a beam in the intersection of the associated beam set of the beam a3 and the associated beam set of the beam a4, only the associated beam set of the beam a1, the beam a2, the beam a3, and the beam a4 (in this case, M is 4), and resources corresponding to beams in the second beam set other than the first beam set can be obtained.

In yet another example, the third information is used to configure the number of the plurality of beams in the second set of beams, for example, 50 beams are included in the second set of beams, wherein 16 beams are beams in the first set of beams, and the third information may be used to configure the number of 34 beams other than the first set of beams and the number of N (N is less than or equal to 16) beams in the first set of beams. Wherein, 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, and the network device takes the numbering sequence of the horizontal direction first and the vertical direction later according to the spatial distribution relationship of the beams in the horizontal and elevation directions, and sequentially numbers the beams. Wherein the number of the beam may be the same as the identification of the reference signal on the beam (such as SSB index or CSI-RS resource ID).

For example, the terminal device may determine, according to the number of each beam in the second beam set and a preset rule, a resource corresponding to each beam in the second beam set except for the first beam set. 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 limited specifically. For example, the preset rule may be to obtain an average value, and take the beam c (which is a beam other than the first beam set) as an example, the number of the beam c is (number of the beam a1 + number of the beam a 2)/2, or the number of the beam c is (number of the beam a3 + number of the beam a4 + number of the beam a 5)/3, that is, the number of the beam c may be a value calculated by the preset rule from the numbers of two or more beams. Specifically, if the beam c is the beam with the number 9 (abbreviated as beam 9), since the number 8 (corresponding beam is abbreviated as beam 8) and the number 10 (corresponding beam is abbreviated as beam 10) of the beam c are averaged, the resource corresponding to the beam 9 may include the resources corresponding to the beam 8 and the beam 10, where the beam 8 and the beam 10 are both the beams in the first beam set. It is understood that the resource corresponding to the beam 9 may also include the resources corresponding to the beam 1 and the beam 17, that is, there may be multiple sets of the resource corresponding to the beam 9.

As can be seen from the above three examples, 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, and in this embodiment of the application, if the terminal device determines that the recovery beam corresponds to multiple sets of resources, it may select one set of resources from the multiple sets of resources, and send a beam recovery request (i.e., report the recovery beam) to the network device using the selected resource. The specific selection rule may be various, for example, a group of resources with the best beam quality may be selected based on the beam quality, for example, the recovered beam corresponds to two groups of resources, which are: (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 better, and the quality of beam a3 and beam a4 is worse, the terminal device may send a beam recovery request to the network device using RACH resource b1 and RACH resource b 2.

As can be seen from the above, the third information may be used to determine the resources corresponding to the beams in the second beam set except for the first beam set, and since the resources corresponding to the beams include the resources corresponding to the beams in the first beam set, that is, the beams are implicitly indicated by the beams in the first beam set, the third information may also be referred to as an implicit indication rule. It can be understood that besides the situations described in the above three examples, there are other possible implicit indication manners, which are not specifically limited in this embodiment of the application, but all the specific implementations that implement implicit indication of beams in the second beam set except for the first beam set based on the above idea are within the protection scope of the present invention.

For the above steps 301 to 303, it should be noted that: (1) the network device may send the first information, the second information, and the third information through the same signaling, or may send the first information, the second information, and the third information through multiple signaling, respectively, which is not limited specifically. (2) In the above description, the network device may send the second information to the terminal device to indicate the reporting mode of the terminal device, and in other possible implementation manners, the reporting mode of the terminal device may also be indicated in an implicit manner, for example, if the terminal device receives an implicit indication rule (third information) sent by the network device, it is determined that the reporting mode of the terminal device is the combined resource reporting mode, and if the terminal device does not receive the implicit indication rule (third information) sent by the network device, it is determined that the reporting mode of the terminal device is the non-combined resource reporting mode. (3) In the step 302, if the reporting mode of the terminal device is a non-combined resource reporting mode, after determining that the beam failure occurs, the terminal device may select a first beam from the first beam set, and send a beam recovery request to the network device using a resource corresponding to the first beam, which may be specifically implemented in the prior art.

Further, the 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 resource corresponding to the second beam. Accordingly, the terminal device may receive the beam recovery response and complete the beam failure recovery.

In the embodiment of the present application, for the combined resource reporting manner, specific implementation manners of the terminal device sending the beam recovery request and the network device returning the beam recovery response may be various.

In one possible implementation, the terminal device may send a beam recovery request to the network device using resources corresponding to the second beam (which may include resources corresponding to a plurality of beams in the first beam set), and the network device may return a first beam recovery response to the terminal device through the plurality of beams, respectively. For example, the resource corresponding to the second beam includes a resource corresponding to a beam a1, a resource corresponding to a beam a2, … …, and a resource corresponding to a beam an, where n may be an integer less than 16, the terminal device may send a beam recovery request to the network device using the resource corresponding to the beam a1, the resource corresponding to the beam a2, … …, and the resource corresponding to the beam an, and the network device may return a beam recovery response to the terminal device through the beam a1, the beam a2, … …, and the beam an, respectively. Specifically, referring to fig. 5a, the terminal device sends a beam recovery request 1 to the network device using a resource corresponding to a beam a1, and accordingly, after receiving the beam recovery request 1 sent by the terminal device through a beam a1, the network device may switch to a beam a1 to return a beam recovery response 1 to the terminal device, and accordingly, the terminal device may monitor the beam recovery response 1 within a response monitoring time window; the terminal device sends a beam recovery request 2 to the network device by using the resource corresponding to the beam a2, and accordingly, after receiving the beam recovery request 2 sent by the terminal device through the beam a2, the network device can switch to the beam a2 to return a beam recovery response 2 to the terminal device, and accordingly, the terminal device can monitor the beam recovery response 2 in a response monitoring time window; in this way, the terminal device sends a beam recovery request n to the network device by using the resource corresponding to the beam an, and accordingly, after receiving the beam recovery request n sent by the terminal device through the beam an, the network device can switch to the beam an to return a beam recovery response n to the terminal device, and accordingly, the terminal device can monitor the beam recovery response n in the response monitoring time window. Thus, the network device may determine that the recovered beam is the second beam according to the implicit indication rule and the beam a1, the beams a2, … …, and the beam an, and the terminal device may determine that the beam failure recovery is completed according to monitoring the beam recovery response 1, the beam recovery responses 2, … …, and the beam recovery response n, and then may execute step 306. In this way, since the terminal device monitors the beam recovery response in the corresponding response monitoring time window after sending the beam recovery request using the resource corresponding to each beam, if the terminal device does not monitor the beam recovery response in any response monitoring time window of the previous n-1 response monitoring time windows, it can directly determine that the beam recovery fails without sending other beam recovery requests again (for example, after the terminal device sends the beam recovery request 1, it does not monitor the beam recovery response 1, it does not need to send the beam recovery request 2 to the beam recovery request n again), thereby saving transmission resources.

In yet another possible implementation, the terminal device may send a beam recovery request to the network device using resources corresponding to the second beam (which may include resources corresponding to a plurality of beams in the first beam set), and the network device may return a second beam recovery response to the terminal device through the second beam. Following the above example, specifically, referring to fig. 5b, the terminal device uses the resource corresponding to the beam a1 to send a beam recovery request 1 to the network device, and accordingly, after receiving the beam recovery request 1 sent by the terminal device through the beam a1, the network device may not return a beam recovery response because a recovery beam is not determined temporarily; the terminal device uses the resource corresponding to the beam a2 to send a beam recovery request 2 to the network device, and accordingly, after the network device receives the beam recovery request 2 sent by the terminal device through the beam a2, the network device may not return a beam recovery response because the recovery beam is not determined yet; in this way, the terminal device sends a beam recovery request 1n to the network device by using the resource corresponding to the beam an, and accordingly, after receiving the beam recovery request n sent by the terminal device through the beam an, the network device determines that the recovered beam is a second beam based on an implicit indication rule, so that the network device can switch to the second beam to return a beam recovery response k to the terminal device. Accordingly, after the terminal device receives the beam recovery response k through the second beam, it may determine that the beam failure recovery is completed, and may further perform step 306. 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, so that the transmission resources can be effectively saved; and because the terminal equipment only needs to monitor the wave beam recovery response after sending the wave beam recovery request n, and does not need to monitor the wave beam recovery response in the first n-1 response monitoring time windows, the wave beam failure recovery process can be accelerated, and the wave beam failure recovery efficiency is improved.

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

In the embodiment of the application, on one hand, after it is determined that the beam fails to occur, the terminal device may select the recovery beam from the second beam set, and compared with the case that the recovery beam can only be selected from the first beam set, the selection range of the recovery beam is expanded, and the possibility that the terminal device selects an available recovery beam is greatly improved. 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 send a beam recovery request to the network device using resources corresponding to multiple beams in the first beam set, that is, the recovery beam is indicated in an implicit indication manner, so that resources corresponding to each beam in the first beam set configured by the network device can be used for not only reporting the beam in the first beam set, but also implicitly reporting the beam other than the first beam set, thereby greatly improving the probability of successful beam recovery.

It should be noted that the implicit indication manner of the beam provided in the embodiment of the present invention may also be extended to the beam reporting process in other possible scenarios; for example, the resource corresponding to the beam a1 is RACH resource b1, the resource corresponding to the beam a2 is RACH resource b2, and the resource corresponding to the beam c includes RACH resource b1 and RACH resource b2 (that is, the beam a1 and the beam a2 implicitly indicate the beam c), so that after the terminal device reports the beam using RACH resource b1 and RACH resource b2, the network device may determine that the beam reported by the terminal device includes beam a1, beam a2 and beam c; it can be seen that the number of reported beams can be increased by introducing an implicit indication mode.

Example two

Next, a possible overall flow interaction scenario of the beam failure recovery method provided in the embodiment of the present application is described with reference to fig. 6.

Fig. 6 is an overall flow interaction diagram of a beam failure recovery method according to a second embodiment of the present application, and as shown in fig. 6, the method includes:

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

It can be understood that the network device may send the configuration information through one signaling, or send the configuration information through different signaling, which is not limited specifically.

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, determine a resource corresponding to each beam in the first beam set according to the first information, determine a reporting mode of the terminal device according to the second information, and obtain an implicit indication rule according to the third information.

Step 603, the network device sends a reference signal.

Here, the network device transmitting the reference signal may include the network device transmitting a first reference signal through the beam d (the first reference signal being a reference signal for beam failure detection); further, the network device may further transmit a reference signal corresponding to each beam through each beam in the second beam set, such as transmitting a reference signal corresponding to beam a1 through beam a1, and transmitting a reference signal corresponding to beam a2 through beam a 2.

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 the beam failure occurs, if the reporting mode of the terminal device is a non-combined resource reporting mode, then step 605 to step 607 are executed, and if the reporting mode of the terminal device is a combined resource reporting mode, then step 608 to step 610 are executed.

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

Step 606, after receiving the beam recovery request sent by the terminal device using the resource corresponding to the first recovery beam, the network device switches to the first recovery beam to send a beam recovery response to the terminal device.

In step 607, the network device and the terminal device communicate via the first recovered beam.

Step 608, the terminal device selects a second recovery beam from a second beam set, and sends a beam recovery request to the network device using a resource corresponding to the second recovery beam, where the second beam set includes a beam 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 set of beams or may be a beam outside the first set of beams.

Specifically, the terminal device may measure a reference signal corresponding to each beam in the second beam set sent by the network device, and then select a beam with the best quality as the second recovered beam according to a measurement result. Here, if the beam with the best quality includes a plurality of beams, the terminal device may randomly select one of the plurality of beams as the second recovery beam, or the terminal device may preferentially select a beam in the first beam set from the plurality of beams as the second recovery beam. Because the terminal device can directly obtain the resource corresponding to the beam in the first beam set according to the first information, and the terminal device only needs to send the beam recovery request through the beam in the first beam set, the terminal device preferentially selects the beam in the first beam set as the second recovery beam, which is beneficial to improving the efficiency of beam failure recovery.

If the second recovered beam is a beam other than the first beam set, the terminal device may determine, based on an implicit indication rule, a resource corresponding to the second recovered beam. If the second recovered beam is a beam in the first beam set, the terminal device may directly obtain a resource corresponding to the second recovered beam based on the first information, or the terminal device may determine the resource corresponding to the second recovered beam based on an implicit indication rule. If the second recovery beam corresponds to multiple sets of resources, the terminal device may select one set of resources from the multiple sets of resources, and send a beam recovery request to the network device using the selected resource.

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

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

It should be noted that: (1) the step number in the first and second embodiments of the present invention is only an example of an execution flow, and does not limit the order of executing the steps, and there is no strict execution order between steps that have no time sequence dependency relationship between them in the embodiments of the present application. (2) The second embodiment describes a possible interaction flow based on the first embodiment, and specific implementation of each step may refer to the first embodiment, which is not described herein again.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between a network device and a terminal device. It is understood that, in order to implement the above functions, the network device or the terminal device may include a corresponding hardware structure and/or software module for performing each function. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In case of integrated units (modules), fig. 7 shows a possible exemplary block diagram of the beam recovery apparatus involved in the embodiments of the present application, which apparatus 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 configured to control and manage operations of the apparatus 700. The communication unit 703 is used to support communication of the apparatus 700 with other network entities. Optionally, the communication unit 703, also referred to as a transceiver unit, may include a receiving unit and/or a transmitting unit for performing receiving and transmitting operations, respectively. The apparatus 700 may further comprise 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 Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processing (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 703 may be a communication interface, a transceiver circuit, or the like, wherein the communication interface is generally referred to, and in a specific implementation, the communication interface may include a plurality of interfaces. The memory unit 701 may be a memory.

The apparatus 700 may be the terminal device in any of the above embodiments, or may also be a semiconductor chip disposed in the terminal device. Processing unit 702 may enable apparatus 700 to perform the actions of the terminal device in the above method examples. Alternatively, the processing unit 702 mainly performs terminal internal actions in the method example, and the communication unit 703 may support communication between the apparatus 700 and a network device. For example, the processing unit 702 is configured to enable the apparatus 700 to perform step 302 in fig. 3, step 604 (a related action of determining that a beam fails), step 605 (a related action of selecting a first recovery beam), step 608 (a related action of selecting a second recovery beam) in fig. 6; the communication unit 702 is configured to enable the apparatus 700 to perform step 303 in fig. 3, step 602, step 604 (an operation of receiving the first reference signal), step 605 (an operation of transmitting the beam recovery request), step 607, step 608 (an operation of transmitting the beam recovery request), and step 610 in fig. 6.

Specifically, in an embodiment, the communication unit (specifically, 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 a 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, where the second beam set includes a beam in the first beam set and at least one beam outside the first beam set;

the communication unit (specifically, may be a transmitting unit) is configured to, if the second beam is a beam other than the first beam set, transmit a beam recovery request to the network device using a resource corresponding to the second beam, where the resource corresponding to the second beam includes resources corresponding to multiple beams in the first beam set.

In a possible design, the communication unit (specifically, the receiving unit) is further configured to receive second information sent by the network device, where the second information is used to indicate that a reporting mode of the terminal device is a combined resource reporting mode.

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

In one possible design, the third information is used to determine a resource corresponding to the second beam, and includes: the third information is used for configuring a combined beam corresponding to the second beam, where the combined beam corresponding to the second beam includes the plurality of beams; or, the third information is used to configure an associated beam set of the plurality of beams, and the second beam is a beam in an intersection of the associated beam set of the plurality of beams; or, in a possible design, the third information is used to determine a resource corresponding to the second beam, and includes: the third information is used for configuring the second beam and the numbers of the plurality of beams, and the number of the second beam is a value calculated by a preset rule according to the numbers of the plurality of beams.

the processing unit is further configured to select a set of resources from the plurality of sets of resources; the communication unit (specifically, may be a transmitting unit) is specifically configured to transmit a second beam recovery request to the network device using the selected resource.

In a possible design, the communication unit (specifically, the receiving unit) is further configured to receive beam recovery responses returned by the network device through the multiple beams, respectively, and then the communication unit (specifically, the transmitting unit and/or the receiving unit) communicates with the network device through the second beam; or, the communication unit (specifically, the receiving unit) is further configured to receive a beam recovery response returned by the network device through the second beam, and then the communication unit (specifically, the transmitting unit and/or the receiving unit) communicates with the network device through the second beam.

The apparatus 700 may also be a network device in any of the above embodiments, or may also be a semiconductor chip disposed in a network device. The processing unit 702 may enable the apparatus 700 to perform the actions of the network device in the above method examples. Alternatively, the processing unit 702 mainly performs the network device internal actions 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 configured to enable 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. 6.

Specifically, in an embodiment, the communication unit (specifically, the transmitting unit) is configured to transmit, to the terminal device, first information, where the first information is used to indicate a resource corresponding to each beam in a first beam set; and the communication unit (specifically, the receiving unit) is configured to receive a beam recovery request transmitted by the terminal device using a resource corresponding to a second beam, where the second beam is a beam other than the first beam set, and the resource corresponding to the second beam includes resources corresponding to a plurality of beams in the first beam set.

In a possible design, the communication unit (specifically, the sending unit) is further configured to send second information to the terminal device, where the second information is used to indicate that a reporting mode of the terminal device is a combined resource reporting mode.

In a possible design, the communication unit (specifically, the transmitting unit) is further configured to transmit third information to the terminal device, where the third information is used to determine a resource corresponding to the second beam.

In one possible design, the third information is used to determine a resource corresponding to the second beam, and includes: the third information is used for configuring a combined beam corresponding to the second beam, where the combined beam corresponding to the second beam includes the plurality of beams; or, the third information is used to configure an associated beam set of the plurality of beams, and the second beam is a beam in an intersection of the associated beam set of the plurality of beams; or the third information is used to configure the second beam and the numbers of the multiple beams, where the number of the second beam is a value calculated by a preset rule from the numbers of the multiple beams.

In a possible design, the communication unit (specifically, the receiving unit) is further configured to return a first beam recovery response to the terminal device through the multiple beams, respectively, and then the communication unit (specifically, the receiving unit and/or the transmitting unit) communicates with the network device through the second beam; or, the communication unit (specifically, the receiving unit) is further configured to return a second beam recovery response to the terminal device through the second beam, and then the communication unit (specifically, the receiving unit and/or the transmitting unit) communicates with the network device through the second beam.

It should be noted that, in the embodiment of the present application, the division of the unit (module) is schematic, and is only a logic function division, and there may be another division manner in actual implementation. Each functional module 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 are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or make a contribution to the prior art, or all or part of the technical solutions may be implemented in the form of a software product stored in a storage medium, and including several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Fig. 8 shows a schematic structural diagram of an apparatus, where the apparatus 800 includes a processor 810, a memory 820, and a transceiver 830. In one example, the apparatus 800 may implement the functions of the apparatus 700 illustrated in fig. 7, and in particular, the functions of the communication unit 703 illustrated in fig. 7 may be implemented by a transceiver, the functions of the processing unit 702 may be implemented by a processor, and the functions of the storage unit 701 may be implemented by a memory. In another example, the apparatus 800 may be a network device in the method embodiment, or may also be a terminal device in the method embodiment, and the apparatus 800 may be configured to implement the method corresponding to the network device or the terminal device described in the method embodiment, which may specifically refer to the description in the method embodiment.

Fig. 9 is a schematic structural diagram of a terminal device 900 according to an embodiment of the present application. For convenience of explanation, fig. 9 shows only main components of the terminal device. As shown in fig. 9, the terminal apparatus 900 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The terminal device 900 can be applied to the system architecture shown in fig. 1, and performs the functions of the terminal device in the above method embodiments.

The processor is mainly configured to process the communication protocol and the communication data, control the entire terminal device, execute a software program, process data of the software program, and control the terminal device to perform the actions described in the above method embodiments. The memory is used primarily for storing software programs and data. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

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

Those skilled in the art will appreciate that fig. 9 shows only one memory and processor for ease of illustration. 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, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 9 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may 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.

For example, if the apparatus 700 illustrated in fig. 7 is a terminal device, in the embodiment of fig. 9, the antenna and the control circuit having the transceiving function may be regarded as a communication unit of the apparatus 700, and the processor having the processing function may be regarded as a processing unit of the apparatus 700. As shown in fig. 9, the terminal apparatus 900 includes a communication unit 901 and a processing unit 902. The communication unit 901 may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the communication unit 901 may be regarded as a receiving unit, and a device for implementing a transmitting function in the communication unit 901 may be regarded as a transmitting unit, that is, the communication unit 901 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

Terminal device 900 shown in fig. 9 is capable of implementing various processes involving the terminal device in the method embodiments of fig. 3 or 6. The operations and/or functions of the respective modules in the terminal device 900 are respectively for implementing the corresponding flows in the above-described method embodiments. Specifically, reference may be made to the description of the above method embodiments, and the detailed description is appropriately omitted herein to avoid redundancy.

Fig. 10 is a schematic structural diagram of a network device provided in an embodiment of the present application, for example, a schematic structural diagram of a base station. As shown in fig. 10, the network device 1000 can be applied to the system architecture shown in fig. 1, and performs 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 (BBUs) (which may also be referred to as Digital Units (DUs)) 1002.

The RRU 1001 may be referred to as a transceiver unit, transceiver circuitry, or transceiver, etc., which may include at least one antenna 1011 and a radio frequency unit 1012. The RRU 1001 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for sending indication information in the above method embodiment. The RRU 1001 and the BBU 1002 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.

The BBU 1002 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) 1002 can be used to control a base station to execute the operation flow related to the network device in the above-described method embodiment.

In an embodiment, the BBU 1002 may be formed by one or more boards, where the boards may jointly support a radio access network (e.g., an LTE network) with a single access indication, or may respectively support radio access networks with different access systems (e.g., an LTE network, a 5G network, or other networks). The BBU 1002 further includes a memory 1021 and a processor 1022, the memory 1021 being used for storing necessary instructions and data. The processor 1022 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure related to the network device in the above method embodiment. The memory 1021 and processor 1022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It should be appreciated that the network device 1000 shown in fig. 10 is capable of implementing the various processes in fig. 3 or 6 involving a network device. The operations and/or functions of the modules in the network device 1000 are respectively configured to implement the corresponding flows in the above method embodiments. Specifically, reference may be made to the description of the above method embodiments, and the detailed description is appropriately omitted herein to avoid redundancy.

In implementation, the steps of the method provided by this embodiment may be implemented by hardware integrated logic circuits in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The processor in the embodiments of the present application may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will be appreciated that the memory or storage units in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The various illustrative logical units and circuits described in this application may be implemented or operated upon by design of a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in the embodiments herein may be embodied directly in hardware, in a software element executed by a processor, or in a combination of the two. The software cells may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC, which may be disposed in a terminal device. In the alternative, the processor and the storage medium may reside as discrete components in a terminal device.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Although the embodiments of the present application have been described with reference to specific features, it is apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the embodiments of the present application. Accordingly, the specification and figures are merely exemplary of embodiments of the application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the embodiments of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the embodiments of the present application are intended to include such modifications and variations as well.

Claims

1. A method for beam failure recovery, the method comprising:

2. The method of claim 1, wherein before the terminal device selects the second beam from the second set of beams, further comprising:

3. The method according to claim 1 or 2, characterized in that the method further comprises:

and the terminal equipment receives third information sent by the network equipment, wherein the third information is used for determining resources corresponding to the second beam.

4. The method of claim 3, wherein the third information is used for determining a resource corresponding to the second beam, and comprises:

the third information is used for configuring a combined beam corresponding to the second beam, where the combined beam corresponding to the second beam includes the plurality of beams; alternatively, the first and second electrodes may be,

the third information is used for configuring an associated set of beams of the plurality of beams, and the second beam is a beam in an intersection of the associated set of beams of the plurality of beams; alternatively, the first and second electrodes may be,

the third information is used for configuring the second beam and the numbers of the plurality of beams, and the number of the second beam is a value calculated by a preset rule according to the numbers of the plurality of beams.

5. The method according to any of claims 1 to 4, wherein the second beam corresponds to a plurality of sets of resources;

6. The method according to any of claims 1 to 5, wherein after the terminal device sends a second beam recovery request to the network device using the resource corresponding to the second beam, the method further comprises:

7. A method for beam failure recovery, the method comprising:

8. The method of claim 7, further comprising:

and the network equipment sends second information to the terminal equipment, wherein the second information is used for indicating that the reporting mode of the terminal equipment is a combined resource reporting mode.

9. The method according to claim 7 or 8, characterized in that the method further comprises:

and the network equipment sends third information to the terminal equipment, wherein the third information is used for determining resources corresponding to the second beam.

10. The method of claim 9, wherein the third information is used for determining a resource corresponding to the second beam, and comprises:

11. The method according to any one of claims 7 to 10, further comprising:

and after returning a second beam recovery response to the terminal equipment through the second beam, the network equipment communicates with the terminal equipment through the second beam.

12. A beam recovery apparatus, characterized in that the beam recovery apparatus comprises a transmitting 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 a first beam set;

the transmitting unit is configured to, if the second beam is a beam other than the first beam set, transmit a beam recovery request to the network device using a resource corresponding to the second beam, where the resource corresponding to the second beam includes resources corresponding to multiple beams in the first beam set.

13. The apparatus of 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 a reporting mode of the beam recovery apparatus is a combined resource reporting mode.

14. 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 the resource corresponding to the second beam.

15. The method according to any of claims 12 to 14, wherein the receiving unit is further configured to receive a beam recovery response returned by the network device through the plurality of beams, respectively, or a beam recovery response returned by the network device through the second beam;

the transmitting unit and/or the receiving unit are further configured to communicate with the network device through the second beam.

16. A beam recovery apparatus, characterized in that the beam recovery apparatus comprises a transmitting unit and a receiving unit;

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

the receiving unit is configured to receive a beam recovery request sent by the terminal device using a resource corresponding to a second beam, where the second beam is a beam other than the first beam set, and the resource corresponding to the second beam includes resources corresponding to multiple beams in the first beam set.

17. The apparatus of claim 16, wherein the sending unit is further configured to send second information to the terminal device, and the second information is used to indicate that a reporting mode of the terminal device is a combined resource reporting mode.

18. 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 the resource corresponding to the second beam.

19. The apparatus according to any of claims 16 to 18, wherein the transmitting unit is further configured to return a first beam recovery response to the terminal device via the plurality of beams or a second beam recovery response to the terminal device via the second beam, respectively;

the transmitting unit and/or the receiving unit are further configured to communicate with the terminal device through the second beam.

20. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 11.