CN111294844A

CN111294844A - Beam failure recovery method, user terminal and computer-readable storage medium

Info

Publication number: CN111294844A
Application number: CN201910249234.2A
Authority: CN
Inventors: 张萌; 王化磊
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-06-16
Anticipated expiration: 2039-03-29
Also published as: CN111294844B

Abstract

A beam failure recovery method, a user terminal and a computer readable storage medium are provided, the method comprises: when the beam failure is detected, sending an uplink message to a base station; the uplink message includes at least one of: carrier unit indication information when a beam failure occurs, reference signal indication information of a new beam, carrier unit indication information to which the new beam reference signal belongs, L1-RSRP indication information of the new beam reference signal, indication information for indicating whether a new beam meeting requirements is found, and indication information for distinguishing a conventional RACH from a RACH for BFR; and receiving a downlink message sent by the base station, and executing beam failure recovery according to the downlink message. The above scheme enables the use of the BFR function in 2-step RACH.

Description

Beam failure recovery method, user terminal and computer-readable storage medium

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a beam failure recovery method, a user terminal, and a computer-readable storage medium.

Background

When a user terminal needs to establish a connection with a base station, after the user terminal completes cell search to realize downlink synchronization, uplink synchronization or data transmission needs to be performed, and the above process is generally referred to as a random access process.

In the prior art, a New Radio (NR) implements random access by the following steps: step 1, a user terminal sends a random access preamble (Msg1) to a base station; step 2, the base station returns a random access response (Msg2) to the user terminal; step 3, the user terminal sends a message 3 to the base station (Msg 3); and step 4, the base station sends a competition resolving message (Msg4) to the user terminal. Therefore, the random access process can be completed only by the information interaction of the user terminal and the base station in four steps, and for some terminals sensitive to delay requirements, the problem of long delay exists.

In R16, the 3GPP organization proposes that the user terminal interacts with the base station by 2 steps to complete a random access (2-step RACH) procedure, and the uplink message is defined as MsgA and may include Msg1 and Msg3 in the above four steps; the downlink message is defined as MsgB, and may include the contents of Msg2 and Msg4 in the above four steps.

However, in the prior art, how to use the BFR function in the 2-step RACH (Random Access Channel) procedure is not disclosed.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a scheme for using a BFR function in a 2-step RACH procedure.

To solve the foregoing technical problem, an embodiment of the present invention provides a method for recovering a beam failure, including: when the beam failure is detected, sending an uplink message to a base station; the uplink message includes at least one of: and receiving downlink information sent by the base station by carrier unit indication information when beam failure occurs, reference signal indication information of a new beam, carrier unit indication information to which the new beam reference signal belongs, L1-RSRP indication information of the new beam reference signal, indication information used for indicating whether a new beam meeting requirements is found, and indication information used for distinguishing a conventional RACH from an RACH used for BFR, and executing beam failure recovery according to the downlink information.

Optionally, the sending the uplink message to the base station includes: sorting information in the uplink information, taking the reference signal indication information of the new beam, the carrier unit indication information to which the new beam reference signal belongs, and the L1-RSRP indication information of the new beam reference signal as a whole, and arranging any one of the carrier unit indication information when the beam failure occurs and the indication information for distinguishing the conventional RACH from the RACH for BFR before the whole, and arranging the other one after the whole.

Optionally, the length of the indication information for distinguishing the conventional RACH from the RACH for BFR is 1 bit; and when the length of the indication information for distinguishing the conventional RACH from the RACH for BFR is a first value, the indication information for distinguishing the conventional RACH from the RACH for BFR is used to indicate the RACH for BFR.

Optionally, the sending the uplink message to the base station includes: and sending the uplink message to a base station by adopting a Physical Uplink Shared Channel (PUSCH) resource.

Optionally, before sending the uplink message to the base station, the method further includes: and receiving configuration information issued by the base station, wherein the configuration information carries the position of indication information used for distinguishing a conventional RACH from an RACH used for BFR on the PUSCH resource.

Optionally, the performing of beam failure recovery according to the downlink message includes: when the CFRA-BFR resource, the 4-step CBRA resource and the 2-step CBRA resource are configured in the downlink information, after a first timer reaches a preset time length, the 4-step CBRA or the 2-step CBRA is used for carrying out beam failure recovery; after the second timer reaches the preset time length, using the 4-step CBRA to recover the beam failure; when the CFRA-BFR resource and the 2-stepBRA resource are configured in the downlink information, after a third timer reaches a preset time length, the 2-step CBRA resource is used for carrying out beam failure recovery; wherein: any one of the first timer, the second timer and the third timer is configured and issued by the base station.

An embodiment of the present invention further provides a user terminal, including: a sending unit, configured to send an uplink message to a base station after detecting that a beam fails; the uplink message includes at least one of: the first receiving unit is used for receiving downlink information sent by a base station, and comprises carrier unit indication information when beam failure occurs, reference signal indication information of a new beam, carrier unit indication information to which the reference signal of the new beam belongs, L1-RSRP indication information of the reference signal of the new beam, indication information used for indicating whether a new beam meeting requirements is found, and indication information used for distinguishing a conventional RACH from an RACH used for BFR; and the execution unit is used for executing beam failure recovery according to the downlink message.

Optionally, the sending unit is configured to sort information in the uplink information, use reference signal indication information of the new beam, carrier unit indication information to which the new beam reference signal belongs, and L1-RSRP indication information of the new beam reference signal as a whole, and arrange any one of the carrier unit indication information when a beam failure occurs and the indication information for distinguishing between a conventional RACH and a RACH used for BFR before the whole, and arrange the other one after the whole.

Optionally, the sending unit is configured to send the uplink message to a base station by using a PUSCH resource.

Optionally, the user terminal further includes: and a second receiving unit, configured to receive configuration information issued by the base station before the sending unit sends the uplink message to the base station, where the configuration information carries a position of indication information on the PUSCH resource, where the indication information is used to distinguish a conventional RACH from a RACH used for BFR.

Optionally, the execution unit is configured to, when the CFRA-BFR resource, the 4-stepCBRA resource, and the 2-step CBRA resource are configured in the downlink information, perform beam failure recovery using the 4-step CBRA or the 2-step CBRA after a first timer reaches a preset duration; after the second timer reaches the preset time length, using the 4-step CBRA to recover the beam failure; when the CFRA-BFR resource and the 2-step CBRA resource are configured in the downlink information, after a third timer reaches a preset time length, the 2-step CBRA resource is used for carrying out beam failure recovery; wherein: any one of the first timer, the second timer and the third timer is configured and issued by the base station.

An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and has computer instructions stored thereon, and when the computer instructions are executed, the method performs any of the steps of the beam failure recovery method described above.

The embodiment of the present invention further provides another user terminal, which includes a memory and a processor, where the memory stores a computer instruction that can be executed on the processor, and the processor executes any of the above steps of the beam failure recovery method when executing the computer instruction.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

and when the beam failure is detected, sending an uplink message to the base station. In the uplink message, the indication information related to the beam failure is included, so that the base station can perform the subsequent beam recovery process according to the uplink message.

Drawings

Fig. 1 is a flowchart of a beam failure recovery method in an embodiment of the present invention;

fig. 2 to 6 are schematic diagrams illustrating the positions of several a-5 messages in the PUSCH of the MsgA according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a user terminal of a terminal according to an embodiment of the present invention.

Detailed Description

From the above, the prior art does not disclose how to use the BFR function in the 2-step RACH procedure.

In the embodiment of the invention, when the beam failure is detected, the uplink message is sent to the base station. In the uplink message, the indication information related to the beam failure is included, so that the base station can perform the subsequent beam recovery process according to the uplink message.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

An embodiment of the present invention provides a beam failure recovery method, which is described in detail below with reference to fig. 1 through specific steps.

Step S101, when the beam failure is detected, an uplink message is sent to the base station.

In a specific implementation, the uplink message sent by the ue to the base station may include: indication information for distinguishing a normal (normal) RACH from a RACH for BFR.

In the embodiment of the invention, after the beam failure (beam failure) occurs in the user terminal, the beam failure recovery can be realized through the 2-step RACH flow (procedure). In practical applications, the definition of beam failure may be: the user terminal monitors a group of RS sets configured by the base station and used for beam quality monitoring, if the hypothetic BLER corresponding to all the RSs in the set is lower than a certain threshold value, the set is marked as a beam failure instance, and when the count of the beam failure instance reaches a certain value, the beam failure is considered.

In a specific implementation, the PUSCH resource may be used to transmit an uplink message to the base station. In the embodiment of the invention, the PUSCH in MsgA of the 2-step RACH flow can carry information related to BFR. In an embodiment of the present invention, the BFR related information may include at least one of A-1 information, A-2 information, A-3 information, A-4 information, A-5 information, and A-6 information.

In the embodiment of the present invention, the a-1 information is Carrier Component Carrier (CC) indication information when beam failure (beam failure) occurs, and the meaning indicated by the indication information is the serial number of the CC in which the beam failure occurs.

The a-2 information is indication information of a Reference Signal (RS) of the new Beam (new Beam), and means that the RS is the serial number of the RS corresponding to the new Beam for Beam Failure Recovery (BFR) selected by the user terminal. The RS may be a Channel State Information (CSI) -RS or a Synchronization Signal Block (SSB) or a Sounding Reference Signal (SRS). The a-2 information may include RSs for one or more new beams.

The information a-3 is CC indication information to which the new beam RS belongs, and the meaning indicated by the information is the serial number of the CC corresponding to the new beam RS for BFR selected by the user equipment.

The a-4 information is Layer 1-Reference signaling receiving Power (L1-RSRP) indication information of the new beam RS, which means L1-RSRP corresponding to the new beam RS selected by the user terminal for BFR.

The a-5 information is indication information for distinguishing a conventional RACH (normal RACH, or referred to as non-BFR RACH) from a RACH for BFR, and indicates the meaning for distinguishing whether the current RACH is a normal 2-step RACH procedure or a 2-step RACH procedure for BFR. The conventional RACH may refer to a RACH procedure other than that for BFR, and specifically may include a RACH for uplink out-of-synchronization recovery or a RACH requesting scheduling function or other functions.

The a-6 information is indication information indicating whether the terminal finds a new beam that satisfies the requirements. For example, when the a-6 information is 0, it indicates that the terminal does not find a new beam that meets the requirement, and when the a-6 information is 1, it indicates that the terminal finds a new beam that meets the requirement. And vice versa.

As a variation, the a-6 information may set the serial number corresponding to the RS of the new beam in the a-2 information to a special value to indicate that the terminal does not find a new beam that meets the requirement. For example, the sequence number corresponding to the RS of the new beam may be set to 0 or-1.

As a variation, the a-6 information may set the serial number of the CC to which the RS of the new beam in the a-3 information belongs to a special value to indicate that the terminal does not find a new beam that meets the requirement. For example, the sequence number of the CC to which the RS of the new beam belongs may be set to 0 or-1.

As a variation, the a-6 information may be a special value of L1-RSRP in the a-4 information to indicate that the terminal has not found a new beam that meets the requirements. For example, L1-RSRP may be set to 0 or-1 or other values to indicate that the terminal has not found a new beam that meets the requirements. The requirement is satisfied, that is, the L1-RSRP of the RS corresponding to the beam is greater than or equal to a certain threshold.

In an embodiment of the present invention, the A-5 information may be 1-bit information. When the value of the A-5 information is a first value, the current RACH flow is a 2-step RACH for BFR; on the contrary, when the value of the A-5 information is the second value, the current RACH is not the 2-step RACH used for BFR.

For example, when the value of the a-5 information is 1, it indicates that the current RACH procedure is a 2-step RACH for BFR; and when the value of the A-5 information is 0, indicating that the current RACH flow is not the 2-step RACH used for BFR.

As a variation, the A-5 information may also be used to distinguish between 2-step RACH for BFR, 4-step RACH for BFR, and conventional RACH (normal RACH, alternatively referred to as non-BFR RACH). When the value of the A-5 information is a first value, the current RACH is a 2-step RACH for BFR; when the value of the A-5 information is a second value, the current 2-step RACH is a 4-step RACH for BFR; and when the value of the A-5 information is a third value, the current RACH is not the RACH used for BFR.

For example, when the value of the a-5 information is 00, it indicates that the current RACH procedure is 2-stepRACH for BFR; when the value of the A-5 information is 01, the current RACH flow is 4-step RACH used for BFR; and when the value of the A-5 information is 10, indicating that the current RACH is not the RACH for BFR. The value 11 of a-5 is taken as reserved state (reserved).

As another variation, the a-5 information is indication information for distinguishing a normal RACH (or referred to as non-BFRRACH) from a RACH for BFR, which is expressed in the meaning of distinguishing whether the current RACH procedure is a normal RACH or a RACH for BFR. The conventional RACH may refer to other RAH procedures than those for BFR, and may specifically include a RACH for uplink out-of-synchronization recovery or a request scheduling function.

As a variation, the user terminal may implicitly distinguish whether the current RACH procedure is a normal RACH (or referred to as non-BFR RACH) or a 2-step RACH for BFR by using the PRACH resource or preamble sequence or PUSCH resource. The conventional RACH and the 2-step RACH for BFR may employ separate PRACH resources or preamble sequences or PUSCH resources.

As a variation, the user terminal may implicitly distinguish a conventional RACH (or referred to as a non-BFR RACH) from a RACH for BFR by a PRACH resource or a preamble sequence or a PUSCH resource. The conventional RACH and the RACH for BFR may use separate PRACH resources or preamble sequences or PUSCH resources.

As a variation, the user terminal may implicitly distinguish the 2-step RACH for BFR, the 4-step RACH for BFR, and the conventional RACH (normal RACH, or non-BFR RACH) by PRACH resources or preamble sequences or PUSCH resources. The 2-step RACH for BFR, the 4-step RACH for BFR and the conventional RACH may employ respective independent PRACH resources or preamble sequences or PUSCH resources.

In an embodiment of the present invention, the A-5 information may be 1-bit information. When the value of the A-5 information is a first value, the current RACH flow is RACH used for BFR; on the contrary, when the value of the a-5 information is the second value, it indicates that the current RACH is not the RACH for BFR.

For example, when the value of the a-5 information is 1, it indicates that the current RACH procedure is the RACH for BFR; and when the value of the A-5 information is 0, indicating that the current RACH is not the RACH for BFR.

In a specific implementation, the location of the a-5 information on time-frequency resources within the PUSCH in the MsgA may be fixed. The base station may read the a-5 information at a fixed time-frequency resource location. For example, referring to fig. 2 to 6, schematic diagrams of positions of several a-5 messages in the MsgA within the PUSCH in the embodiment of the present invention are given.

In fig. 2, a-5 information is Resource Element (RE) or Resource Block (RB) in the top left corner within PUSCH in MsgA. In fig. 3, the a-5 message is in the RE or RB in the lower left corner within PUSCH in MsgA. In fig. 4, the a-5 message is the RE or RB in the upper right corner within PUSCH in MsgA. In fig. 5, the a-5 message is the RE or RB in the lower right corner within PUSCH in MsgA. In fig. 6, the a-5 message is a preset RE or RB within the PUSCH in MsgA.

In a specific implementation, the location of the a-5 information may be configured by the base station in advance through higher layer signaling. For example, the base station may configure the location of the a-5 information in advance through Radio Resource Control (RRC) signaling. In RRC signaling, the specific location of the a-5 message within the PUSCH in MsgA may be indicated, which may include the time domain location information and the frequency domain location information where the a-5 message is located. The time domain position information may include slot index indication information and/or symbol index indication information; the frequency domain location information may include RB index indication information and/or RE index indication information.

In the implementation, the ue may also inform the base station through an implicit method. For example, some specific PRACH resources or preamble sequences or PUSCH resources may be associated with the event that the user terminal does not find a new beam that meets the requirements. Once the base station detects PRACH transmission on these PRACH resources or detects these specific preamble sequences or detects uplink transmission on specific PUSCH resources, it knows that the user terminal does not find a new beam that meets the requirements.

In particular implementations, when the BFR information includes multiple pieces of information, the multiple pieces of information may also be ordered. In the embodiment of the invention, the A-2 information, the A-3 information and the A-4 information are all related to the Reference Signal (RS) of the new beam (new beam), so that the A-2 information, the A-3 information and the A-4 information can be taken as a whole, and the A-1 information and the A-5 information can be taken as independent individuals respectively. Thereafter, the A-1 information, the A-5 information, the A-2 information, the A-3 information, and the A-4 information are sorted.

When the BFR information includes A-1 information, A-2 information, A-3 information, A-4 information and A-5 information, the ordering mode in the BFR information may be sequentially A-1 information, A-3 information, A-2 information, A-4 information, A-5 information, A-3 information, A-2 information, A-4 information, A-1 information, A-5 information, A-1 information, A-3 information, A-2 information, A-4 information.

When the BFR information includes A-1 information, A-2 information, A-4 information and A-5 information, the ordering mode in the BFR information may be sequentially A-1 information, A-2 information, A-4 information and A-5 information, may also be sequentially A-5 information, A-2 information, A-4 information and A-1 information, and may also be sequentially A-5 information, A-1 information, A-2 information and A-4 information.

When the BFR information includes A-1 information, A-2 information, A-3 information and A-4 information, the ordering mode in the BFR information may be sequentially A-1 information, A-3 information, A-2 information and A-4 information, or sequentially A-3 information, A-2 information, A-4 information and A-1 information.

When the BFR information includes A-1 information, A-2 information and A-4 information, the ordering mode in the BFR information may be sequentially A-1 information, A-2 information and A-4 information, or sequentially A-2 information, A-4 information and A-1 information.

When the BFR information comprises A-1 information, A-5 information and A-6 information, the ordering mode in the BFR information can be sequentially A-1 information, A-5 information and A-6 information, or sequentially A-1 information, A-6 information and A-5 information, or sequentially A-5 information, A-6 information and A-1 information, or sequentially A-5 information, A-1 information and A-6 information, or sequentially A-6 information, A-1 information and A-5 information, or sequentially A-6 information, A-5 information and A-1 information.

When the BFR information comprises A-1 information and A-6 information, the ordering mode in the BFR information can be A-1 information and A-6 information in sequence, or A-6 information and A-1 information in sequence.

It is understood that in practical applications, there may be other ordering manners for the ordering of the information in the BFR information, and the ordering is not limited to the above illustration. In a specific implementation, a corresponding sorting manner may be selected according to an actual application requirement, which is not described in detail herein.

Step S102, receiving downlink information sent by a base station, and executing beam failure recovery according to the downlink information.

In a specific implementation, after receiving downlink information issued by the base station, the user terminal may perform beam failure recovery according to the received downlink information.

In a specific implementation, when a CFRA-BFR (content-free random access-beam failure recovery) resource, a 4-step CBRA (content-based random access) resource, and a 2-step CBRA resource are configured in the downlink information, after a first timer reaches a preset duration, the ue can only use the 4-step cbbra or the 2-step CBRA to recover the beam failure. And after the second timer reaches the preset duration, the user terminal can only use the 4-step CBRA to perform beam failure recovery. The first timer and/or the second timer may be configured by the base station through a higher layer signaling (e.g., RRC) and sent to the ue. Wherein the CFRA-BFR resources refer to CFRA resources used for BFR purposes; the 4-step CBRA resource refers to a 4-step CBRA resource for BFR purposes; the 2-step CBRA resource refers to a 2-step CBRA resource used for BFR purposes.

As a variation, when a CFRA-BFR (content-free random access-beam failure recovery) resource, a 4-step CBRA (content-based random access) resource, and a 2-step CBRA resource are configured in the downlink information, the ue may first use the CFRA-BFR resource to perform beam failure recovery. And after the timer (timer) reaches the preset time length, the user terminal uses the 2-step CBRA to recover the beam failure. the timer can be configured by the base station through higher layer signaling (such as RRC) and sent to the user terminal. Wherein the CFRA-BFR resource may be a CFRA resource for BFR purposes; the 4-step CBRA resource may be a 4-step CBRA resource for BFR purposes; the 2-step CBRA resource may be a 2-step CBRA resource for BFR purposes.

As a variation, when a CFRA-BFR (content-free random access-beam failure recovery) resource, a 4-step CBRA (content-based random access) resource, and a 2-step CBRA resource are configured in the downlink information, the ue can only use the CFRA-BFR resource and the 2-step CBRA resource to perform beam failure recovery, or the ue can only use the CFRA-BFR resource and the 4-step CBRA resource to perform beam failure recovery, or the ue can only use the 2-step CBRA resource and the 4-step CBRA resource to perform beam failure recovery. Wherein the CFRA-BFR resource may be a CFRA resource for BFR purposes; the 4-step CBRA resource may be a 4-step CBRA resource for BFR purposes; the 2-step CBRA resource may be a 2-step CBRA resource for BFR purposes.

In specific implementation, when the CFRA-BFR resource and the 2-step CBRA resource are configured in the downlink information, the CFRA-BFR resource is used for carrying out beam failure recovery, and after the timer reaches a preset time length, the 2-step CBRA resource is used for carrying out beam failure recovery. The timer can be configured by the base station through higher layer signaling (such as RRC) and sent to the ue. Wherein the CFRA-BFR resource may be a CFRA resource for BFR purposes; the 2-step CBRA resource may be a 2-step CBRA resource for BFR purposes.

As a variation, when the downlink information is configured with the CFRA-BFR resource and the 2-step CBRA resource, the ue can only use the 2-step CBRA resource for beam failure recovery after the timer reaches the preset duration. The timer can be configured by the base station through higher layer signaling (such as RRC) and sent to the ue. Wherein the CFRA-BFR resource may be a CFRA resource for BFR purposes; the 2-step CBRA resource may be a 2-step CBRA resource for BFR purposes.

In a specific implementation, when the downlink information is configured with the 2-step CBRA resource and the 4-step CBRA resource, the 2-step CBRA resource is used for carrying out beam failure recovery, and after the timer reaches a preset time length, the 2-step CBRA resource is used for carrying out beam failure recovery. Wherein the 4-step CBRA resource can be a 4-step CBRA resource for BFR purposes; the 2-step CBRA resource may be a 2-step CBRA resource for BFR purposes.

As a variation, when the downlink information is configured with the 2-step CBRA resource and the 4-step CBRA resource, the ue can only use the 4-step CBRA resource for beam failure recovery after the timer reaches the preset duration. The timer can be configured by the base station through higher layer signaling (such as RRC) and sent to the ue. Wherein the 4-step CBRA resource can be a 4-step CBRA resource for BFR purposes; the 2-step CBRA resource may be a 2-step CBRA resource for BFR purposes.

As a variation, when the downlink information is configured with the 2-step CBRA resource and the 4-step CBRA resource, the ue can only use the 2-step CBRA resource for the beam failure recovery, or the ue can only use the 4-step cbbra resource for the beam failure recovery. Wherein the 4-step CBRA resource can be a 4-step CBBRA resource for BFR purposes; the 2-step CBRA resource may be a 2-step CBRA resource for BFR purposes.

Referring to fig. 7, a user terminal 70 in the embodiment of the present invention is provided, which includes: a sending unit 701, a first receiving unit 702, and an executing unit 703, wherein:

a sending unit 701, configured to send an uplink message to a base station after detecting that a beam fails; the uplink message includes at least one of: carrier unit indication information when a beam failure occurs, reference signal indication information of a new beam, carrier unit indication information to which the new beam reference signal belongs, L1-RSRP indication information of the new beam reference signal, indication information for indicating whether a new beam meeting requirements is found, and indication information for distinguishing a conventional RACH from a RACH for BFR;

a first receiving unit 702, configured to receive a downlink message sent by a base station;

an executing unit 703 is configured to execute beam failure recovery according to the downlink message.

In a specific implementation, the sending unit 701 may be configured to sort information in the uplink information, take the reference signal indication information of the new beam, the carrier unit indication information to which the new beam reference signal belongs, and the L1-RSRP indication information of the new beam reference signal as a whole, and arrange any one of the carrier unit indication information when the beam failure occurs and the indication information for distinguishing the normal RACH from the RACH used for BFR before the whole, and arrange the other one after the whole.

In a specific implementation, the length of the indication information for distinguishing the conventional RACH from the RACH for BFR may be 1 bit; and when the length of the indication information for distinguishing the conventional RACH from the RACH for BFR is a first value, the indication information for distinguishing the conventional RACH from the RACH for BFR is used to indicate the RACH for BFR.

In a specific implementation, the sending unit 701 may be configured to send the uplink message to a base station by using a PUSCH resource.

In a specific implementation, the user terminal 70 may further include: a second receiving unit 704, configured to receive configuration information sent by a base station before a sending unit sends the uplink message to the base station, where the configuration information carries a position of indication information on the PUSCH resource, where the indication information is used to distinguish a conventional RACH from a RACH used for BFR.

In a specific implementation, the execution unit 703 may be configured to, when the CFRA-BFR resource, the 4-step CBRA resource, and the 2-step CBRA resource are configured in the downlink information, perform beam failure recovery using the 4-step cbbra or the 2-step CBRA after a first timer reaches a preset time duration; after the second timer reaches the preset time length, using 4-stepcBRA to recover the beam failure; when the CFRA-BFR resource and the 2-step CBRA resource are configured in the downlink information, after a third timer reaches a preset time length, the 2-step CBRA resource is used for carrying out beam failure recovery; wherein: any one of the first timer, the second timer and the third timer is configured and issued by the base station.

The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and has computer instructions stored thereon, and when the computer instructions are executed, the steps of the beam failure recovery method provided in any of the above embodiments are performed.

The embodiment of the present invention further provides a user terminal, which includes a memory and a processor, where the memory stores a computer instruction that can be executed on the processor, and the processor executes the steps of the beam failure recovery method provided in any of the above embodiments when executing the computer instruction.

The technical scheme of the invention can be applied to a 5G (5Generation) communication system, a 4G communication system, a 3G communication system and various subsequent evolution communication systems, such as 6G, 7G and the like. The technical solution of the present invention is also applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, and Vehicle-to-event architecture.

A Base Station (BS) in the embodiment of the present application, which may also be referred to as a Base Station device, is a device deployed in a radio access network to provide a wireless communication function. For example, the device providing the Base Station function in the 2G Network includes a Base Transceiver Station (BTS) and a Base Station Controller (BSC), the device providing the Base Station function in the 3G Network includes a node B (NodeB) and a Radio Network Controller (RNC), the device providing the Base Station function in the 4G Network includes an evolved node B (evolved NodeB, eNB), the device providing the Base Station function in the Wireless Local Area Network (WLAN) is an Access Point (Access Point, AP), the device providing the Base Station function in the 5G New Radio (New Radio, NR) includes a node B (gnb) that continues to evolve, and the device providing the Base Station function in a New communication system in the future, and the like.

A terminal in the embodiments of the present application may refer to various forms of User Equipment (ue), an access terminal, a subscriber unit, a subscriber Station, a Mobile Station (ms), a remote Station, a remote terminal, a Mobile device, a User terminal, a terminal device (terminal Equipment), a wireless communication device, a User agent, or a User Equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.

In the embodiment of the application, a unidirectional communication link from an access network to a terminal is defined as a downlink, data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called as a downlink direction; the unidirectional communication link from the terminal to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is referred to as an uplink direction.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship. The "plurality" appearing in the embodiments of the present application means two or more.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present application, and do not constitute any limitation to the embodiments of the present application.

The term "connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application.

In the embodiments of the present application, "network" and "system" represent the same concept, and a communication system is a communication network.

It should be understood that, in the embodiment of the present Application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for beam failure recovery, comprising:

when the beam failure is detected, sending an uplink message to a base station; the uplink message includes at least one of: carrier unit indication information when a beam failure occurs, reference signal indication information of a new beam, carrier unit indication information to which the new beam reference signal belongs, L1-RSRP indication information of the new beam reference signal, indication information for indicating whether a new beam meeting requirements is found, and indication information for distinguishing a conventional RACH from a RACH for BFR;

and receiving a downlink message sent by the base station, and executing beam failure recovery according to the downlink message.

2. The beam failure recovery method of claim 1, wherein said sending an uplink message to a base station comprises:

sorting information in the uplink information, taking the reference signal indication information of the new beam, the carrier unit indication information to which the new beam reference signal belongs, and the L1-RSRP indication information of the new beam reference signal as a whole, and arranging any one of the carrier unit indication information when the beam failure occurs and the indication information for distinguishing the conventional RACH from the RACH for BFR before the whole, and arranging the other one after the whole.

3. The beam failure recovery method of claim 1, wherein the length of the indication information for distinguishing the normal RACH from the RACH for BFR is 1 bit; and when the length of the indication information for distinguishing the conventional RACH from the RACH for BFR is a first value, the indication information for distinguishing the conventional RACH from the RACH for BFR is used to indicate the RACH for BFR.

4. The beam failure recovery method of claim 1, wherein said sending an uplink message to a base station comprises:

and sending the uplink message to a base station by adopting PUSCH resources.

5. The beam failure recovery method of claim 4, before transmitting the uplink message to the base station, further comprising:

and receiving configuration information issued by the base station, wherein the configuration information carries the position of indication information used for distinguishing a conventional RACH from an RACH used for BFR on the PUSCH resource.

6. The beam failure recovery method of claim 1, wherein the performing beam failure recovery according to the downlink message comprises:

when the CFRA-BFR resource, the 4-step CBRA resource and the 2-step CBRA resource are configured in the downlink information, after a first timer reaches a preset time length, the 4-step CBRA or the 2-step CBRA is used for carrying out beam failure recovery; after the second timer reaches the preset time length, using the 4-step CBRA to recover the beam failure;

when the CFRA-BFR resource and the 2-step CBRA resource are configured in the downlink information, after a third timer reaches a preset time length, the 2-step CBRA resource is used for carrying out beam failure recovery; wherein: any one of the first timer, the second timer and the third timer is configured and issued by the base station.

7. A user terminal, comprising:

a sending unit, configured to send an uplink message to a base station after detecting that a beam fails; the uplink message includes at least one of: carrier unit indication information when a beam failure occurs, reference signal indication information of a new beam, carrier unit indication information to which a new beam reference signal belongs, L1-RSRP indication information of a new beam reference signal, indication information for indicating whether a new beam satisfying requirements is found, and indication information for distinguishing a conventional RACH from a RACH for BFR

A first receiving unit, configured to receive a downlink message sent by a base station;

and the execution unit is used for executing beam failure recovery according to the downlink message.

8. The user terminal according to claim 7, wherein the transmitter unit is configured to rank information in the uplink information, and arrange, as a whole, reference signal indication information of the new beam, carrier unit indication information to which the new beam reference signal belongs, and L1-RSRP indication information of the new beam reference signal, and arrange any one of the carrier unit indication information when the beam failure occurs and the indication information for distinguishing between a normal RACH and a RACH used for BFR before the whole, and arrange the other after the whole.

9. The user terminal of claim 7, wherein the indication information for distinguishing the normal RACH from the RACH for BFR has a length of 1 bit; and when the length of the indication information for distinguishing the conventional RACH from the RACH for BFR is a first value, the indication information for distinguishing the conventional RACH from the RACH for BFR is used to indicate the RACH for BFR.

10. The user terminal of claim 7, wherein the transmitting unit is configured to transmit the uplink message to a base station using PUSCH resources.

11. The user terminal of claim 10, further comprising: and a second receiving unit, configured to receive configuration information issued by the base station before the sending unit sends the uplink message to the base station, where the configuration information carries a position of indication information on the PUSCH resource, where the indication information is used to distinguish a conventional RACH from a RACH used for BFR.

12. The ue of claim 7, wherein the performing unit is configured to, when the CFRA-BFR resource, the 4-step CBRA resource, and the 2-step CBRA resource are configured in the downlink information, perform beam failure recovery using the 4-step CBRA or the 2-step CBRA after a first timer reaches a preset duration; after the second timer reaches the preset time length, using the 4-step CBRA to recover the beam failure; when the CFRA-BFR resource and the 2-step CBRA resource are configured in the downlink information, after a third timer reaches a preset time length, the 2-step CBRA resource is used for carrying out beam failure recovery; wherein: any one of the first timer, the second timer and the third timer is configured and issued by the base station.

13. A computer readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having computer instructions stored thereon, wherein the computer instructions, when executed, perform the steps of the beam failure recovery method according to any one of claims 1 to 6.

14. A user terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the beam failure recovery method of any of claims 1 to 6.