Beam recovery and request methods, apparatus, and computer-readable storage media

Abstract

A beam recovery and request method, apparatus, and computer-readable storage medium are disclosed. The beam recovery request method includes: receiving indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI; measuring a beam monitoring reference signal associated with the PCI associated with the at least one first TCI state to obtain a first measurement result, the first measurement result being used to indicate the signal quality of the beam monitoring reference signal; and if the first measurement result satisfies a first condition, sending a beam recovery request. This scheme avoids the long latency caused by RRC signaling reconfiguration and reduces downlink resource overhead.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a beam recovery and request method, apparatus, and computer-readable storage medium. Background Technology

[0002] Based on the 3GPP NR protocol, within a cell, next-generation nodeB (gNB) and user equipment (UE) determine the optimal transmit and receive beams through a beam training process, and utilize these optimal transmit and receive beams to improve the transmission quality of uplink and downlink signals. During beam training and reporting, the UE saves the receive beam corresponding to each reported transmit beam.

[0003] According to the NR protocol, while the gNB configures and / or instructs the UE to use the appropriate beam for transmission and reception, the gNB will configure a set of beam monitoring reference signals and a set of candidate beam identification reference signals for the UE via RRC signaling. These are used to monitor beam failure events and identify candidate beams, respectively. When the UE detects a beam failure event, it sends a beam recovery request to the gNB, including the cell where the beam failed and / or the candidate beam. Upon receiving the beam recovery request, the gNB sends a beam recovery response message to the UE, indicating successful beam recovery.

[0004] In NR Rel-17, 3GPP supports rapid Transmit Receive Point (TRP) handover via Media Access Control (MAC) Control Element (CE) signaling, and allows for pre-training of the target TRP's beam, enabling seamless data communication during UE mobility. To support beam recovery for the UE while communicating with any TRP, the gNB needs to reconfigure the beam monitoring reference signal and candidate beam identification reference signal corresponding to the current TRP via RRC signaling after a TRP handover. However, this RRC signaling reconfiguration adds additional latency and overhead. Summary of the Invention

[0005] The embodiments of the present invention address the problem of long latency and high downlink resource overhead caused by RRC signaling reconfiguration.

[0006] This invention provides a beam recovery request method, comprising: receiving indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI; measuring a beam monitoring reference signal associated with the PCI associated with the at least one first TCI state to obtain a first measurement result, the first measurement result being used to indicate the signal quality of the beam monitoring reference signal; and if the first measurement result satisfies a first condition, sending a beam recovery request.

[0007] Optionally, the beam recovery request method further includes: receiving cell configuration information, the cell configuration information including the at least one second TCI state, each second TCI state being associated with a PCI, and the at least one second TCI state including the at least one first TCI state.

[0008] Optionally, the cell configuration information may further include at least one of the following: at least one beam monitoring reference signal, and each beam monitoring reference signal is associated with a PCI; at least one candidate beam identification reference signal, and each beam monitoring reference signal is associated with a PCI.

[0009] Optionally, receiving the cell configuration information includes: receiving an RRC message and obtaining the cell configuration information from the RRC message.

[0010] Optionally, receiving the indication information includes: receiving a first MAC CE message and obtaining the indication information from the first MAC CE message.

[0011] Optionally, the beam recovery request method further includes: measuring a specific candidate beam identification reference signal to obtain a second measurement result; wherein the second measurement result satisfies a second condition.

[0012] Optionally, the specific candidate beam identification reference signal includes at least one of the following: a candidate beam identification reference signal associated with a PCI that is associated with at least one first TCI state indicated by the indication information; and a candidate beam identification reference signal not associated with a PCI that is associated with at least one first TCI state indicated by the indication information.

[0013] Optionally, the beam recovery request includes at least one of the following: an identifier of at least one PCI associated with a first TCI state indicated by the indication information, and an index of the optimal candidate beam identification reference signal.

[0014] Optionally, the beam recovery request method further includes: receiving a beam recovery response message and performing beam recovery; the beam recovery response message corresponds to the beam recovery request.

[0015] Optionally, receiving the beam recovery response message includes any one of the following: receiving a second MAC CE message, the second MAC CE message being used to indicate the reactivation of one or more TCI states; receiving DCI signaling on the HARQ process corresponding to sending the beam recovery request to schedule new uplink data.

[0016] This invention also provides a beam recovery method, comprising: sending indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI; receiving a beam recovery request; and sending a beam recovery response message corresponding to the beam recovery request.

[0017] Optionally, it further includes: sending cell configuration information; the cell configuration information includes the at least one second TCI state, each second TCI state is associated with a PCI, and the at least one second TCI state includes the at least one first TCI state.

[0018] Optionally, the cell configuration information may further include at least one of the following: at least one beam monitoring reference signal, and each beam monitoring reference signal is associated with a PCI; at least one candidate beam identification reference signal, and each beam monitoring reference signal is associated with a PCI.

[0019] Optionally, sending the cell configuration information includes sending an RRC message, wherein the RRC message carries the cell configuration information.

[0020] Optionally, sending the indication information includes: sending a first MAC CE message, wherein the first MAC CE message carries the indication information.

[0021] Optionally, the beam recovery request includes at least one of the following: an identifier of the PCI associated with at least one first TCI state indicated by the indication information, and an index of the optimal candidate beam identification reference signal; the optimal candidate beam identification reference signal is selected from a specific candidate beam identification reference signal.

[0022] Optionally, the specific candidate beam identification reference signal includes at least one of the following: a candidate beam identification reference signal associated with a PCI that is associated with at least one first TCI state indicated by the indication information; and a candidate beam identification reference signal not associated with a PCI that is associated with at least one first TCI state indicated by the indication information.

[0023] Optionally, sending the beam recovery response message includes any of the following: sending a second MAC CE message, the second MAC CE message being used to indicate the reactivation of one or more TCI states; sending DCI signaling, the DCI signaling being used to schedule new uplink data on the HARQ process occupied by sending the beam recovery request.

[0024] This invention also provides a beam recovery request apparatus, comprising: an indication information receiving unit for receiving indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI; a measurement unit for measuring a beam monitoring reference signal associated with the PCI associated with the at least one first TCI state, and obtaining a first measurement result, the first measurement result being used to indicate the signal quality of the beam monitoring reference signal; and a transmission unit for transmitting a beam recovery request when the first measurement result satisfies a first condition.

[0025] This invention also provides a beam recovery apparatus, comprising: an indication information sending unit for sending indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI; a beam recovery request receiving unit for receiving a beam recovery request; and a response message sending unit for sending a beam recovery response message corresponding to the beam recovery request.

[0026] This invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is run by a processor, it executes the steps of any of the beam recovery request methods described above, or executes the steps of any of the beam recovery methods described above.

[0027] This invention also provides a communication device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor runs the computer program, the communication device executes any of the beam recovery request methods described above.

[0028] This invention also provides another wave communication device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor runs the computer program, the communication device executes any of the beam recovery methods described above.

[0029] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects:

[0030] The system receives indication information to determine at least one first TCI state, which is indexed from a second TCI state and is associated with the same PCI. Based on the received indication information, the beam monitoring reference signal corresponding to the PCI associated with the at least one TCI state is measured to obtain a first measurement result. When the first measurement result satisfies a first condition, a beam recovery request is sent. Since the beam monitoring reference signal associated with the PCI associated with at least one TCI state can be obtained in advance, there is no need to reconfigure the beam monitoring reference signal using RRC signaling during TRP handover, thus avoiding the latency caused by RRC signaling and reducing downlink resource overhead. Attached Figure Description

[0031] Figure 1 This is a flowchart of a beam recovery request method according to an embodiment of the present invention;

[0032] Figure 2 This is a flowchart of a beam recovery method according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of a beam recovery request device according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of a beam recovery device according to an embodiment of the present invention. Detailed Implementation

[0035] As described in the background section, in order to support beam recovery for the UE while communicating with any TRP, the gNB needs to reconfigure the beam monitoring reference signal and candidate beam identification reference signal corresponding to the current TRP via RRC signaling after TRP handover. Therefore, RRC signaling reconfiguration adds additional latency and overhead.

[0036] In this embodiment of the invention, indication information is received to determine at least one first TCI state, which is indexed from a second TCI state, and the at least one TCI state is associated with the same PCI. Based on the received indication information, the beam monitoring reference signal corresponding to the PCI associated with the at least one TCI state is measured to obtain a first measurement result. When the first measurement result satisfies a first condition, a beam recovery request is sent. The beam monitoring reference signal associated with the PCI associated with at least one TCI state can be obtained in advance; therefore, it is not necessary to reconfigure the beam monitoring reference signal using RRC signaling during TRP handover, thus avoiding the latency caused by RRC signaling and reducing downlink resource overhead.

[0037] To make the above-mentioned objectives, features and beneficial effects of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] This invention provides a beam recovery request method, referring to... Figure 1 The following will provide a detailed explanation through specific steps.

[0039] In this embodiment of the invention, the beam recovery request method provided in steps S101 to S103 can be executed by the user equipment. Specifically, steps S101 to S103 can be executed by the baseband chip in the user equipment, or by a chip module in the user equipment that includes the baseband chip.

[0040] Step S101: Receive instruction information.

[0041] In specific implementation, the user equipment can receive indication information, which can be used to indicate at least one first TCI state, and at least one indicated first TCI state is activated. The indication information can be sent by the base station or the network side. For example, the indication information is generated and sent by the gNB. Accordingly, the user equipment receives the indication information sent by the base station or network-side equipment.

[0042] In this embodiment of the invention, at least one first TCI state can be associated with the same PCI. In other words, the indication information can be used to indicate the first TCI state corresponding to the same PCI, and the number of first TCI states corresponding to the same PCI can be one or more.

[0043] In practice, user equipment (UE) can receive cell configuration information before receiving indication information. This cell configuration information can be sent to UE by the base station. In other words, the base station can pre-configure and send indication information to UE, meaning that UE essentially already stores the cell configuration information sent by the base station before receiving the indication information. The cell configuration information can correspond to one or more serving cells / physical cells.

[0044] After receiving the indication information, the user equipment can obtain the first TCI state indicated by the indication information from the received cell configuration information.

[0045] In this embodiment of the invention, the user equipment can receive radio resource control (RRC) messages and obtain cell configuration information from the received RRC messages.

[0046] In this embodiment of the invention, the cell configuration information may include at least one second TCI state, each second TCI state being associated with a PCI, and different second TCI states being associated with the same or different PCIs, and at least one second TCI state includes at least one first TCI state. In other words, the first TCI state may be a subset of the second TCI states.

[0047] For example, the second TCI state includes TCI state 1, TCI state 2, TCI state 3, and TCI state 4. The first TCI state includes TCI state 1 and TCI state 2. The first TCI state is a part of the second TCI state.

[0048] For example, the second TCI state includes TCI state 1 and TCI state 2. The first TCI state includes TCI state 1 and TCI state 2. The first TCI state is the same as the second TCI state.

[0049] The cell configuration information may also include at least one of the following: at least one beam monitoring reference signal and at least one candidate beam identification reference signal. That is, the cell configuration information may also include at least one beam monitoring reference signal, or at least one candidate beam identification reference signal, or at least one beam monitoring reference signal and at least one candidate beam identification reference signal.

[0050] When the cell configuration information includes at least one beam monitoring reference signal, each beam monitoring reference signal can be associated with one PCI, and different beam monitoring reference signals can be associated with the same or different PCIs.

[0051] Different beam monitoring reference signals can have a one-to-one corresponding PCI. For example, if two beam monitoring reference signals are configured, there are two PCIs, where beam monitoring reference signal 1 is associated with PCI1 and beam monitoring reference signal 2 is associated with PCI2.

[0052] Different beam monitoring reference signals can also be associated with the same PCI. For example, beam monitoring reference signal 1 and beam monitoring reference signal 2 are both associated with PCI1.

[0053] Among multiple beam monitoring reference signals, some beam monitoring reference signals can be associated with the same PCI, while others can be associated with corresponding PCIs. For example, beam monitoring reference signal 1 and beam monitoring reference signal 2 are both associated with PCI, and beam monitoring reference signal 3 is associated with PCI2.

[0054] When the cell configuration information includes at least one candidate beam identification reference signal, each candidate beam identification reference signal can be associated with one PCI, and different candidate beam identification references can be associated with the same or different PCIs.

[0055] Different candidate beam identification reference signals can have a one-to-one corresponding PCI. For example, if there are two candidate beam identification reference signals and two different PCIs, candidate beam identification reference signal 1 is associated with PCI1, and candidate beam identification reference signal 2 is associated with PCI2.

[0056] Different candidate beam identification reference signals can also be associated with the same PCI. For example, candidate beam identification reference signal 1 and candidate beam identification reference signal 2 are both associated with PCI1.

[0057] Among multiple candidate beamforming reference signals, some candidate beamforming reference signals can be associated with the same PCI, while others can be associated with corresponding PCIs. For example, candidate beamforming reference signal 1 and candidate beamforming reference signal 2 are associated with PCI1, candidate beamforming reference signal 3 is associated with PCI2, and candidate beamforming reference signal 4 is associated with PCI3.

[0058] In this embodiment of the invention, the cell configuration information can configure multiple second TCI states, multiple beam monitoring reference signals, and multiple candidate beam identification reference signals. The multiple beam monitoring reference signals and multiple candidate beam identification reference signals in the cell configuration information can correspond to different TRPs.

[0059] It should be noted that the at least one second TCI state, at least one beam monitoring reference signal, and at least one candidate beam identification reference signal described in the embodiments of the present invention can all be pre-configured by the base station or network-side equipment. The base station or network-side equipment can configure the above information for the user equipment through cell configuration information, or it can configure the above information for the user equipment through configuration information of other types or names.

[0060] In a specific implementation, the user equipment can receive the first MAC CE message and obtain indication information from the first MAC CE message.

[0061] Based on the above example, the user equipment receives a first MAC CE message and obtains indication information from the first MAC CE message. The indication information indicates the first TCI state as: TCI state 1 and TCI state 2, and both TCI state 1 and TCI state 2 are associated with PCI1.

[0062] Step S102: Measure the beam monitoring reference signal associated with the PCI associated with the at least one first TCI state.

[0063] In a specific implementation, the user equipment can measure at least one beam monitoring reference signal associated with at least one PCI state from among at least one beam monitoring reference signal, and obtain a first measurement result. The first measurement result can be used to indicate the signal quality of the beam monitoring reference signal. In this embodiment of the invention, the user equipment can use existing protocols to measure the beam monitoring reference signal, and the specific measurement process and principle can refer to the provisions of existing protocols.

[0064] For example, the index of at least one TCI state indicated by the indication information corresponds to TCI state 1 and TCI state 2, and both TCI state 1 and TCI state 2 are associated with PCI1. If beam monitoring reference signal 1 is associated with PCI1, then the user equipment measures the beam monitoring reference signal 1 corresponding to PCI1 to obtain the signal quality of beam monitoring reference signal 1.

[0065] In this embodiment of the invention, the user equipment can further measure at least one specific candidate beam identification reference signal to obtain a second measurement result, the second measurement result satisfying a second condition. The second measurement result is used to indicate the signal quality of the specific candidate beam identification reference signal. At least one specific candidate beam identification reference signal can be selected from at least one candidate beam identification reference signal in the cell configuration information.

[0066] For example, the cell configuration information includes the following configurations: candidate beam identification reference signal 1, candidate beam identification reference signal 2, candidate beam identification reference signal 3, and candidate beam identification reference signal 4. The user equipment selects candidate beam identification reference signal 2 as the specific candidate beam identification reference signal, performs corresponding measurements on candidate beam identification reference signal 2, and obtains the second measurement result corresponding to candidate beam identification reference signal 2.

[0067] Step S103: If the first measurement result satisfies the first condition, then send a beam recovery request.

[0068] In practice, after obtaining the first measurement result, the user equipment can determine whether the first measurement result meets a preset first condition. If the first measurement result meets the preset first condition, the user equipment can generate and send a beam recovery request.

[0069] In this embodiment of the invention, the user equipment can send the generated beam recovery request to the base station.

[0070] In this embodiment of the invention, the first condition can be a condition that triggers the transmission of a beam recovery request. In one embodiment of the invention, a hypothetical downlink control channel block error rate is calculated based on the beam monitoring reference signal associated with at least one first TCI state indicated by the indication information and the PCI. If the hypothetical downlink control channel block error rate is greater than a specific threshold for a period of time, a beam failure is determined to have occurred. Simultaneously, the signal received power is calculated based on a specific candidate beam identification reference signal. If the signal received power of the specific candidate beam identification reference signal is greater than the threshold (i.e., the second measurement result satisfies the second condition), the first condition is determined to be satisfied, a beam recovery request is generated, and it is transmitted.

[0071] In this embodiment of the invention, the first condition can also be a condition for determining beam failure. Existing conditions for determining beam failure can be used as the first condition provided in this embodiment of the invention. Therefore, when the user equipment detects that the beam monitoring reference signal beam associated with at least one first TCI state indicated by the indication information has failed, it can send a beam recovery request.

[0072] In practice, there can be multiple candidate beamforming reference signals. When there are multiple candidate beamforming reference signals, the user equipment measures all the candidate beamforming reference signals and determines the optimal candidate beamforming reference signal based on the measurement results.

[0073] In this embodiment of the invention, after detecting that the first measurement result meets the first condition, the beam recovery request generated by the user equipment may include only the identifier of at least one PCI associated with the first TCI state indicated by the indication information, or only the index of the optimal candidate beam identification reference signal, or simultaneously include the identifier of at least one PCI associated with the first TCI state indicated by the indication information and the index of the optimal candidate beam identification reference signal.

[0074] In this embodiment of the invention, the identifier of the PCI associated with at least one first TCI state indicated by the indication information may be the same as or different from the PCI corresponding to the optimal candidate beam identification reference signal.

[0075] For example, the PCI associated with at least one first TCI state indicated by the indication information is PCI1, and the PCI corresponding to the optimal candidate beam identification reference signal is PCI2. As another example, the PCI associated with at least one first TCI state indicated by the indication information is PCI1, and the PCI corresponding to the optimal candidate beam identification reference signal is PCI1.

[0076] In specific implementations, a specific candidate beam identification reference signal can be a candidate beam identification reference signal associated with a PCI associated with at least one first TCI state indicated by the indication information, or a candidate beam identification reference signal not associated with a PCI associated with at least one first TCI state indicated by the indication information, or all candidate beam identification reference signals included in the cell configuration information. In specific applications, a specific candidate beam identification reference signal can be determined according to the specific application scenario.

[0077] In practice, after sending a beam recovery request, the user equipment can also receive a beam recovery response message. Upon receiving the response message, the user equipment can perform the corresponding beam recovery operation until beam recovery is successful. The specific process of the beam recovery operation performed by the user equipment can also refer to existing protocols.

[0078] In this embodiment of the invention, the user equipment can send a beam recovery request to the base station. After receiving the beam recovery request, the base station can generate a beam recovery response message corresponding to the beam recovery request and send it to the user equipment.

[0079] In one embodiment of the present invention, the beam recovery response message sent by the base station to the user equipment is a second MAC CE message. The second MAC CE message can be used to indicate the reactivation of one or more TCI states. The user equipment receives the second MAC CE message sent by the base station and reactivates one or more TCI states according to the indication of the second MAC CE message.

[0080] In another embodiment of the present invention, the beam recovery acknowledgment message sent by the base station to the user equipment is: DCI signaling for scheduling new uplink data on the HARQ process occupied by sending the beam recovery request. The user equipment receives the DCI signaling for scheduling new uplink data on the HARQ process corresponding to the beam recovery request, thereby determining that it has received the beam recovery acknowledgment message.

[0081] In summary, in this embodiment of the invention, at least one beam monitoring reference signal associated with a PCI state can be obtained in advance. Therefore, during TRP switching, there is no need to reconfigure the beam monitoring reference signal using RRC signaling, thus avoiding the latency caused by using RRC signaling and reducing downlink resource overhead.

[0082] Reference Figure 2 This invention provides a beam recovery method according to an embodiment of the invention, which will be described in detail below through specific steps.

[0083] In this embodiment of the invention, the beam recovery method provided in steps S201 to S202 can be performed by a base station or network-side equipment. Specifically, steps S201 to S203 can be performed by a chip with data processing capabilities in the base station or network-side equipment, or by a chip module containing a data processing chip in the base station or network-side equipment.

[0084] Step S201: Send instruction information.

[0085] In specific implementation, the indication information can be used to indicate at least one first TCI state, and the at least one first TCI state indicated by the indication information can be associated with the same PCI. In other words, the indication information can be used to indicate the first TCI state corresponding to the same PCI, and the number of first TCI states corresponding to the same PCI can be one or more.

[0086] In this embodiment of the invention, the indication information can be sent by the base station or the network side and received by the user equipment. For example, the indication information can be generated and sent by the gNB.

[0087] In practical implementation, cell configuration information can be issued before issuing the instruction information. In this embodiment of the invention, the cell configuration information can be issued by the base station or the network side, and received by the user equipment. After receiving the cell configuration information, the user equipment then receives the instruction information.

[0088] In other words, instruction information can be pre-configured and sent to user equipment. Before receiving the instruction information, the user equipment has already stored the pre-sent cell configuration information. The cell configuration information can correspond to one or more serving cells / physical cells.

[0089] In practice, after receiving the indication information, the user equipment can obtain at least one first TCI state indicated by the indication information from the received cell configuration information.

[0090] In this embodiment of the invention, the base station can send cell configuration information to the user equipment via RRC messages. The user equipment can receive the RRC messages and obtain the cell configuration information from the received RRC messages.

[0091] In this embodiment of the invention, the cell configuration information may include at least one second TCI state, each second TCI state being associated with a PCI, and different second TCI states being associated with the same or different PCIs, and at least one second TCI state includes at least one first TCI state. In other words, the first TCI state may be a subset of the second TCI states.

[0092] For example, the second TCI state includes TCI state 1, TCI state 2, TCI state 3, and TCI state 4. The first TCI state includes TCI state 1 and TCI state 2. The first TCI state is a part of the second TCI state.

[0093] For example, the second TCI state includes TCI state 1 and TCI state 2. The first TCI state includes TCI state 1 and TCI state 2. The first TCI state is the same as the second TCI state.

[0094] The cell configuration information may also include at least one of the following: at least one beam monitoring reference signal and at least one candidate beam identification reference signal. That is, the cell configuration information may also include at least one beam monitoring reference signal, or at least one candidate beam identification reference signal, or at least one beam monitoring reference signal and at least one candidate beam identification reference signal.

[0095] When the cell configuration information includes at least one beam monitoring reference signal, each beam monitoring reference signal can be associated with one PCI, and different beam monitoring reference signals can be associated with the same or different PCIs.

[0096] Different beam monitoring reference signals can have a one-to-one corresponding PCI. For example, if two beam monitoring reference signals are configured, there are two PCIs, where beam monitoring reference signal 1 is associated with PCI1 and beam monitoring reference signal 2 is associated with PCI2.

[0097] Different beam monitoring reference signals can also be associated with the same PCI. For example, beam monitoring reference signal 1 and beam monitoring reference signal 2 are both associated with PCI1.

[0098] Among multiple beam monitoring reference signals, some beam monitoring reference signals can be associated with the same PCI, while others can be associated with corresponding PCIs. For example, beam monitoring reference signal 1 and beam monitoring reference signal 2 are both associated with PCI, and beam monitoring reference signal 3 is associated with PCI2.

[0099] When the cell configuration information includes at least one candidate beam identification reference signal, each candidate beam identification reference signal can be associated with one PCI, and different candidate beam identification references can be associated with the same or different PCIs.

[0100] Different candidate beam identification reference signals can have a one-to-one corresponding PCI. For example, if there are two candidate beam identification reference signals and two different PCIs, candidate beam identification reference signal 1 is associated with PCI1, and candidate beam identification reference signal 2 is associated with PCI2.

[0101] Different candidate beam identification reference signals can also be associated with the same PCI. For example, candidate beam identification reference signal 1 and candidate beam identification reference signal 2 are both associated with PCI1.

[0102] Among multiple candidate beamforming reference signals, some candidate beamforming reference signals can be associated with the same PCI, while others can be associated with corresponding PCIs. For example, candidate beamforming reference signal 1 and candidate beamforming reference signal 2 are associated with PCI1, candidate beamforming reference signal 3 is associated with PCI2, and candidate beamforming reference signal 4 is associated with PCI3.

[0103] In this embodiment of the invention, the cell configuration information can configure multiple second TCI states, multiple beam monitoring reference signals, and multiple candidate beam identification reference signals. The multiple beam monitoring reference signals and multiple candidate beam identification reference signals in the cell configuration information can correspond to different TRPs.

[0104] It should be noted that the at least one second TCI state, at least one beam monitoring reference signal, and at least one candidate beam identification reference signal described in the embodiments of the present invention can all be pre-configured by the base station or network-side equipment. The base station or network-side equipment can configure the above information for the user equipment through cell configuration information, or it can configure the above information for the user equipment through configuration information of other types or names.

[0105] In practice, indication information can be sent to the user equipment via a first MAC CE message. The user equipment can receive the first MAC CE message and obtain the indication information from it.

[0106] Step S202: Receive beam recovery request.

[0107] In a specific implementation, after activating one or more TCI states associated with the same PCI, the user equipment can measure the beam monitoring reference signal associated with the PCI associated with at least one first TCI state to obtain a first measurement result. The first measurement result can be used to indicate the signal quality of the beam monitoring reference signal. In this embodiment of the invention, the user equipment can use existing protocols to measure the beam monitoring reference signal; the specific measurement process and principle can refer to the provisions of existing protocols.

[0108] For example, the index of at least one TCI state indicated by the indication information corresponds to TCI state 1 and TCI state 2, and both TCI state 1 and TCI state 2 are associated with PCI1. If beam monitoring reference signal 1 is associated with PCI1, then the user equipment measures the beam monitoring reference signal 1 corresponding to PCI1 to obtain the signal quality of beam monitoring reference signal 1.

[0109] In this embodiment of the invention, the user equipment can further measure at least one specific candidate beam identification reference signal to obtain a second measurement result, the second measurement result satisfying a second condition. The second measurement result is used to indicate the signal quality of the specific candidate beam identification reference signal. At least one specific candidate beam identification reference signal can be selected from at least one candidate beam identification reference signal in the cell configuration information.

[0110] In this embodiment of the invention, the first condition can be a condition that triggers the transmission of a beam recovery request. In one embodiment of the invention, a hypothetical downlink control channel block error rate is calculated based on the beam monitoring reference signal associated with at least one first TCI state indicated by the indication information and the PCI. If the hypothetical downlink control channel block error rate is greater than a specific threshold for a period of time, a beam failure is determined to have occurred. Simultaneously, the signal received power is calculated based on a specific candidate beam identification reference signal. If the signal received power of the specific candidate beam identification reference signal is greater than the threshold (i.e., the second measurement result satisfies the second condition), the first condition is determined to be satisfied, a beam recovery request is generated, and it is transmitted.

[0111] In this embodiment of the invention, the first condition can also be a condition for determining beam failure. Existing conditions for determining beam failure can be used as the first condition provided in this embodiment of the invention. Therefore, when the user equipment detects that the beam monitoring reference signal beam associated with at least one first TCI state indicated by the indication information has failed, it can send a beam recovery request.

[0112] In practice, there can be multiple candidate beamforming reference signals. When there are multiple candidate beamforming reference signals, the user equipment measures all the candidate beamforming reference signals and determines the optimal candidate beamforming reference signal based on the measurement results.

[0113] In this embodiment of the invention, after detecting that the first measurement result meets the first condition, the beam recovery request generated by the user equipment may include only the identifier of at least one PCI associated with the first TCI state indicated by the indication information, or only the index of the optimal candidate beam identification reference signal, or simultaneously include the identifier of at least one PCI associated with the first TCI state indicated by the indication information and the index of the optimal candidate beam identification reference signal.

[0114] In this embodiment of the invention, the identifier of the PCI associated with at least one first TCI state indicated by the indication information may be the same as or different from the PCI corresponding to the optimal candidate beam identification reference signal.

[0115] For example, the PCI associated with at least one first TCI state indicated by the indication information is PCI1, and the PCI corresponding to the optimal candidate beam identification reference signal is PCI2. As another example, the PCI associated with at least one first TCI state indicated by the indication information is PCI1, and the PCI corresponding to the optimal candidate beam identification reference signal is PCI1.

[0116] In specific implementations, a specific candidate beam identification reference signal can be a candidate beam identification reference signal associated with a PCI associated with at least one first TCI state indicated by the indication information, or a candidate beam identification reference signal not associated with a PCI associated with at least one first TCI state indicated by the indication information, or all candidate beam identification reference signals included in the cell configuration information. In specific applications, a specific candidate beam identification reference signal can be determined according to the specific application scenario.

[0117] Step S203: Send a beam recovery response message corresponding to the beam recovery request.

[0118] In this embodiment of the invention, the user equipment can send a beam recovery request to the base station. After receiving the beam recovery request, the base station can generate a beam recovery response message corresponding to the beam recovery request and send it to the user equipment.

[0119] In practice, after receiving the beam recovery response message, the user equipment can perform the corresponding beam recovery operation until the beam recovery is successful. The specific process of the beam recovery operation performed by the user equipment can also refer to existing protocols.

[0120] In one embodiment of the present invention, the beam recovery response message sent by the base station to the user equipment is a second MAC CE message. The second MAC CE message can be used to indicate the reactivation of one or more TCI states. The user equipment receives the second MAC CE message sent by the base station and reactivates one or more TCI states according to the indication of the second MAC CE message.

[0121] In another embodiment of the present invention, the beam recovery acknowledgment message sent by the base station to the user equipment is: DCI signaling for scheduling new uplink data on the HARQ process occupied by sending the beam recovery request. The user equipment receives the DCI signaling for scheduling new uplink data on the HARQ process corresponding to the beam recovery request, thereby determining that it has received the beam recovery acknowledgment message.

[0122] Therefore, in this embodiment of the invention, by pre-configuring at least one beam monitoring reference signal associated with PCI and TCI state for the user equipment, there is no need to reconfigure the beam monitoring reference signal using RRC signaling during TRP handover. Thus, the delay caused by using RRC signaling can be avoided and downlink resource overhead can be reduced.

[0123] Reference Figure 3 A schematic diagram of a beam recovery request device according to an embodiment of the present invention is provided. The beam recovery request device 30 includes: an indication information receiving unit 301, a measurement unit 302, and a transmitting unit 303, wherein:

[0124] Indication information receiving unit 301 is used to receive indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI;

[0125] Measurement unit 302 is used to measure the beam monitoring reference signal associated with the PCI associated with the at least one first TCI state, and obtain a first measurement result. The first measurement result is used to indicate the signal quality of the beam monitoring reference signal.

[0126] The transmitting unit 303 is used to transmit a beam recovery request when the first measurement result meets the first condition.

[0127] In specific implementation, the specific execution process of the above-mentioned instruction information receiving unit 301, measurement unit 302 and sending unit 303 can be referred to steps S101 to S103, which will not be elaborated here in the embodiments of the present invention.

[0128] In specific implementations, the aforementioned beam recovery request device 30 may correspond to a chip with data processing function in the user equipment, such as a baseband chip; or to a chip module in the user equipment that includes a chip with data processing function; or to the user equipment itself.

[0129] Reference Figure 4 An embodiment of the present invention provides a beam recovery device 40, comprising: an indication information sending unit 401, a beam recovery request receiving unit 402, and a response information sending unit 403, wherein:

[0130] Indication information sending unit 401 is used to send indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI;

[0131] Beam recovery request receiving unit 402 is used to receive beam recovery requests;

[0132] The response message sending unit 403 is used to send a beam recovery response message corresponding to the beam recovery request.

[0133] In specific implementation, the specific execution process of the above-mentioned instruction information sending unit 401, beam recovery request receiving unit 402 and response information sending unit 403 can be referred to steps S201 to S203 respectively. The specific execution process of these components will not be described in detail here.

[0134] In specific implementations, the aforementioned beam recovery device 40 may correspond to a chip with data processing function in a base station or network-side device, such as a data signal processing chip; or to a chip module in a base station or network-side device that includes a chip with data processing function; or to a base station or network-side device.

[0135] In specific implementation, the modules / units included in the various devices and products described in the above embodiments can be software modules / units, hardware modules / units, or a combination of both.

[0136] For example, for various devices and products applied to or integrated into a chip, each module / unit can be implemented using hardware methods such as circuits, or at least some modules / units can be implemented using software programs that run on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits; for various devices and products applied to or integrated into a chip module, each module / unit can be implemented using hardware methods such as circuits, and different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware methods such as circuits. The components can be implemented using software programs that run on the processor integrated within the chip module. The remaining (if any) modules / units can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into the terminal, each of its components / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or in different components within the terminal. Alternatively, at least some modules / units can be implemented using software programs that run on the processor integrated within the terminal, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits.

[0137] This invention also provides a computer-readable storage medium, which is a non-volatile or non-transient storage medium, storing a computer program thereon. When the computer program is run by a processor, it executes the steps of the beam recovery request method provided in any of the above embodiments, or executes the steps of the beam recovery method provided in any of the above embodiments.

[0138] This invention also provides another communication device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor runs the computer program, the communication device executes the beam recovery request method provided in any of the above embodiments.

[0139] This invention also provides another communication device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor runs the computer program, the communication device executes the beam recovery method provided in any of the above embodiments.

[0140] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include ROM, RAM, disk, or optical disk, etc.

[0141] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A beam recovery request method, characterized in that, Comprising: receiving indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with a same PCI; measuring a beam monitoring reference signal associated with the PCI associated with the at least one first TCI state to obtain a first measurement result, the first measurement result being used to indicate a signal quality of the beam monitoring reference signal; if the first measurement result satisfies a first condition, sending a beam recovery request. 2.The beam recovery request method of claim 1, wherein, Further comprising: receiving cell configuration information, the cell configuration information comprising the at least one second TCI state, each second TCI state being associated with a PCI, and the at least one second TCI state comprising the at least one first TCI state. 3.The beam recovery request method of claim 2, wherein, The cell configuration information further comprises at least one of: at least one beam monitoring reference signal, and each beam monitoring reference signal being associated with a PCI; at least one candidate beam identification reference signal, and each beam monitoring reference signal being associated with a PCI. 4.The beam recovery request method of claim 2, wherein, The receiving the cell configuration information comprises: receiving an RRC message, and obtaining the cell configuration information from the RRC message. 5.The beam recovery request method of claim 1, wherein, The receiving the indication information comprises: receiving a first MAC CE message, and obtaining the indication information from the first MAC CE message. 6.The beam recovery request method of claim 1, wherein, Further comprising: measuring a specific candidate beam identification reference signal to obtain a second measurement result; wherein the second measurement result satisfies a second condition. 7.The beam recovery request method of claim 6, wherein, The specific candidate beam identification reference signal comprises at least one of: a candidate beam identification reference signal associated with the PCI associated with the at least one first TCI state; a candidate beam identification reference signal not associated with the PCI associated with the at least one first TCI state. 8.The beam recovery request method of claim 1, wherein, The beam recovery request comprises at least one of: an identification of the PCI associated with the at least one first TCI state, and an index of an optimal candidate beam identification reference signal. 9.The beam recovery request method of claim 1, wherein, Further comprising: receiving a beam recovery response message to perform beam recovery; The beam recovery response message corresponds to the beam recovery request. 10.The beam recovery request method of claim 9, wherein, The receiving the beam recovery response message comprises any one of: receiving a second MAC CE message, the second MAC CE message being used to indicate reactivating one or more TCI states; receiving DCI signaling scheduling new uplink data on a HARQ process corresponding to the sending of the beam recovery request. 11.A method for beam recovery, the method comprising: Comprising: sending indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with a same PCI; receiving a beam recovery request; the beam recovery request being sent by a user equipment when detecting that a first measurement result satisfies a first condition, the first measurement result being used to indicate a signal quality of a beam monitoring reference signal, the first measurement result being obtained by the user equipment measuring the beam monitoring reference signal associated with the PCI associated with the at least one first TCI state; transmit a beam recovery response message corresponding to the beam recovery request. 12.The beam recovery method of claim 11, wherein, Further comprising: transmit cell configuration information; the cell configuration information comprises the at least one second TCI state, each second TCI state is associated with one PCI, and the at least one second TCI state comprises the at least one first TCI state. 13.The beam recovery method of claim 12, wherein, The cell configuration information further comprises at least one of: at least one beam monitoring reference signal, and each beam monitoring reference signal is associated with one PCI; at least one candidate beam identification reference signal, and each beam monitoring reference signal is associated with one PCI. 14.The beam recovery method of claim 12, wherein, The transmission of the cell configuration information comprises: transmitting an RRC message, and the RRC message carries the cell configuration information. 15.The beam recovery method of claim 11, wherein, The transmission of the indication information comprises: transmitting a first MAC CE message, and the first MAC CE message carries the indication information. 16.The beam recovery method of claim 11, wherein, The beam recovery request comprises at least one of: the identification of the PCI associated with the at least one first TCI state, the index of the optimal candidate beam identification reference signal; the optimal candidate beam identification reference signal is selected from a specific candidate beam identification reference signal. 17.The beam recovery method of claim 16, wherein, The specific candidate beam identification reference signal comprises at least one of: the candidate beam identification reference signal associated with the PCI associated with the at least one first TCI state; the candidate beam identification reference signal not associated with the PCI associated with the at least one first TCI state. 18.The beam recovery method of claim 11, wherein, The transmission of the beam recovery response message comprises at least one of: transmit a second MAC CE message, and the second MAC CE message is used to indicate the reactivation of one or more TCI states; transmit DCI signaling, and the DCI signaling is used to schedule new uplink data on the HARQ process occupied by the transmission of the beam recovery request.

19. A beam recovery request device, characterized in that, Comprise: an indication information receiving unit, configured to receive indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI; a measurement unit, configured to measure a beam monitoring reference signal associated with the PCI associated with the at least one first TCI state, to obtain a first measurement result, and the first measurement result being used to indicate the signal quality of the beam monitoring reference signal; a transmission unit, configured to transmit a beam recovery request when the first measurement result satisfies a first condition.

20. An apparatus for beam recovery, the apparatus comprising: Comprise: an indication information transmitting unit, configured to transmit indication information, the indication information being used to determine at least one first TCI state, the at least one first TCI state being indexed from a second TCI state, and the at least one first TCI state being associated with the same PCI; The beam recovery request receiving unit is configured to receive a beam recovery request, wherein the beam recovery request is sent by a user equipment when detecting that a first measurement result satisfies a first condition, the first measurement result is used to indicate a signal quality of a beam monitoring reference signal, and the first measurement result is obtained by the user equipment measuring a beam monitoring reference signal associated with a PCI associated with the at least one first TCI state; The response message sending unit is configured to send a beam recovery response message corresponding to the beam recovery request.

21. A computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, characterized by The computer program is run by the processor to execute the steps of the beam recovery request method in any one of claims 1-10 or the steps of the beam recovery method in any one of claims 11-18.

22. A communication device comprising a memory and a processor, said memory having stored thereon a computer program that is operable to run on said processor, characterized in that, When the processor runs the computer program, the communication device executes the method in any one of claims 1-10.

23. A communication device comprising a memory and a processor, said memory having stored thereon a computer program that is operable to run on said processor, characterized in that, When the processor runs the computer program, the communication device executes the method in any one of claims 11-18.

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