WO2020216121A1

WO2020216121A1 - Beam failure recovery request sending method and terminal device

Info

Publication number: WO2020216121A1
Application number: PCT/CN2020/085113
Authority: WO
Inventors: 秦城; 曾勇波
Original assignee: 华为技术有限公司
Priority date: 2019-04-24
Filing date: 2020-04-16
Publication date: 2020-10-29
Also published as: CN110933695A; CN110933695B

Abstract

Disclosed in embodiments of the present application are a beam failure recovery request sending method and a terminal device. The method comprises: obtaining a first reference signal received power of each candidate beam in a candidate beam set, the candidate beam set being configured by a base station and used for selecting a recovery beam; when the terminal device detects that a beam failure occurs, and the first reference signal received power of each candidate beam is less than a first preset reference signal received power, determining that the recovery beam is a common beam meeting a preset condition in a common beam set, the common beam being configured by the base station and used for selecting the recovery beam; obtaining a target contention random access channel resource corresponding to the recovery beam according to a mapping relationship between the common beam and a contention random access channel resource; and sending, by the recovery beam, a beam failure recovery request to the base station using the target contention random access channel resource. Use of the embodiments of the present application facilitates reducing the duration of beam failure recovery.

Description

Beam failure recovery request sending method and terminal equipment

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201910335238.2, and the invention title is "a method and terminal for BFR acceleration" on April 24, 2019, on October 24, 2019 The priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201911019900.X, and the invention title is "beam failure recovery request sending method and terminal equipment", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of wireless communication technology, and in particular to a method and terminal device for sending a beam failure recovery request.

Background technique

The process of beam failure recovery includes four steps, step 1: beam failure detection, step 2: restoring beam identification, step 3: beam failure recovery request transmission, step 4: terminal equipment monitors the base station's response to the beam failure recovery request.

At present, during the transmission of the beam failure recovery request, if the terminal device uses the competing random access channel resource with poor channel quality to send the beam failure recovery request to the base station through the recovery beam, the beam failure recovery request transmission is more likely to fail. If it is too large, it may increase the time for beam failure recovery, which will seriously affect the experience of delay-sensitive services (such as cloud games, etc.).

Summary of the invention

The embodiments of the present application provide a method and terminal device for sending a beam failure recovery request, which are used to reduce the time for beam failure recovery.

In the first aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

Acquiring the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam;

When the terminal device detects that a beam failure occurs and the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, it is determined that the restored beam is a common beam that meets the preset conditions in the common beam set, and the common beam The set is configured by the base station and used to select the recovery beam, and the recovery beam is used to maintain normal communication between the terminal equipment and the base station;

Obtain the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

The target contention random access channel resource is used to send a beam failure recovery request to the base station by recovering the beam.

It can be seen that, compared to the terminal device using the competitive random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of the present application, if each candidate beam in the candidate beam set is Cannot be used as a recovery beam, then select a public beam that meets the conditions of the recovery beam from the set of public beams as the recovery beam, and then initiate random access on the target competition for random access channel resources with a better channel quality corresponding to the recovery beam. The beam failure recovery request is less likely to fail to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the method further includes:

Acquiring the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

The second reference signal received power is greater than or equal to the second preset reference signal received power.

It can be seen that in this example, the restored beam is a common beam with the second reference signal received power greater than or equal to the second preset reference signal received power in the common beam set, and then competes for random access to the target with better channel quality corresponding to the restored beam. Random access is initiated on the incoming channel resource. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the method further includes:

The preset conditions are:

The absolute value of the time when the terminal device obtains the second reference signal receiving power greater than or equal to the third preset reference signal receiving power and the failure time is less than the preset duration, and the failure time is the time when the terminal device detects that a beam failure occurs.

It can be seen that, in this example, the restored beam is a common beam whose absolute value between the time when the received power of the second reference signal is greater than or equal to the received power of the third preset reference signal and the time of failure in the public beam set is less than the preset duration. Targets with better channel quality corresponding to the beam compete for random access channel resources to initiate random access. At this time, the beam failure recovery request is less likely to fail to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the method further includes:

The preset conditions are:

The second reference signal receiving power is greater than or equal to the second preset reference signal receiving power, and the terminal device detects that the competing random access channel resource is idle at the earliest.

It can be seen that, in this example, the recovered beam is that the received power of the second reference signal in the set of common beams is greater than or equal to the received power of the second preset reference signal, and the terminal device first detects the common beam that competes for free random access channel resources, and then The target with good channel quality corresponding to the restored beam competes for random access channel resources to initiate random access. At this time, the beam failure recovery request is less likely to fail to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the method further includes:

The preset conditions are:

The absolute value of the time when the terminal device obtains the second reference signal receiving power greater than or equal to the third preset reference signal receiving power and the failure time is less than the preset duration, and the terminal device detects that the competing random access channel resource is idle at the earliest, and the failure time is the terminal The moment when the device detects a beam failure.

It can be seen that, in this example, the restored beam is that the absolute value of the time when the received power of the second reference signal is greater than or equal to the received power of the third preset reference signal in the common beam set and the time of failure is less than the preset duration, and the terminal device detects the competition earliest Random access to the public beam with free channel resources, and then initiate random access on the target with better channel quality corresponding to the recovery beam to compete for random access channel resources. At this time, the beam failure recovery request is less likely to fail. It helps to reduce the time for beam failure recovery.

In some possible implementation manners, the second reference signal received power of each common beam is the average value of at least two third reference signal received powers, and each of the at least two third reference signal received powers The power is measured by the terminal device on the reference signal received power of each common beam.

It can be seen that, compared with the change of the terminal equipment's attitude and/or the change of the competition random access channel, the measurement of the reference signal received power of the public beam is not stable enough, and it is easy to miss the launch of the target competition random access channel resource corresponding to the public beam. Random access. In this example, the received power of the second reference signal of each common beam is the average of the received power of at least two third reference signals, which helps to reduce the insufficient measurement of the received power of the reference signal of the common beam The impact of stability is not missed, and random access is initiated on the target competition random access channel resource corresponding to the public beam, which helps to reduce the time of wave speed failure recovery.

In some possible implementation manners, before the terminal device detects that a beam failure occurs, the method further includes:

Use dual-polarized beams to receive multiple detection reference signals;

Perform block error rate statistical operations on multiple detection reference signals to obtain multiple block error rates, and multiple block error rates correspond to multiple detection reference signals one-to-one;

Determine whether beam failure occurs according to multiple block error rates.

It can be seen that compared to using a single-polarized beam to receive multiple detection reference signals, polarization mismatch is prone to occur. In this example, using a dual-polarized beam to receive multiple detection reference signals helps avoid polarization. Mismatching affects the reception of multiple detection reference signals, thereby improving the accuracy of determining whether a beam failure occurs.

In the second aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

Obtain the reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select candidate beams;

When the terminal device detects that a beam failure has occurred and the reference signal received power of each candidate beam is less than the first preset reference signal received power, it is determined that the restored beam is a candidate beam that meets the preset conditions in the set of candidate beams, and the restored beam is used for Maintain normal communication between terminal equipment and base station;

Obtaining the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource;

Use the target non-contention random access channel resource to send a beam failure recovery request to the base station by restoring the beam.

It can be seen that, compared to the terminal device using the competitive random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of the present application, if each candidate beam in the candidate beam set is If the restoration beam condition is not met, then select a candidate beam that meets the preset conditions from the candidate beam set as the restoration beam, and then initiate random access on the target non-competitive random access channel resource corresponding to the restoration beam. At this time, the beam failure is restored The possibility of request transmission failure is small, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The reference signal received power is greater than or equal to the second preset reference signal received power.

It can be seen that, in this example, the restored beam is a candidate beam whose reference signal received power is greater than or equal to the second preset reference signal received power in the set of candidate beams, and is then used on the target non-competitive random access channel resource corresponding to the restored beam Random access is initiated. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The reference signal received power is greater than or equal to the second preset reference signal received power, and the terminal device detects that the non-contention random access channel resource is idle at the earliest.

It can be seen that, in this example, the restored beam is a candidate beam whose reference signal received power in the candidate beam set is greater than or equal to the second preset reference signal received power, and the terminal device detects that the non-competitive random access channel resource is idle at the earliest, and then Random access is initiated on the target non-contention random access channel resource corresponding to the restored beam. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the reference signal received power of each candidate beam is the average value of at least two first reference signal received powers, and each of the at least two first reference signal received powers is The terminal device measures the received power of the reference signal for each candidate beam.

It can be seen that, compared with the change of the terminal device attitude and/or the change of the competing random access channel, the measurement of the reference signal received power of the candidate beam is not stable enough, and it is easy to miss the target non-competitive random access channel resource corresponding to the candidate beam Initiate random access. In this example, the reference signal received power of each candidate beam is the average of at least two first reference signal received powers, which helps to reduce the measurement of the reference signal received power of the candidate beam is not stable enough The impact caused by this will not miss the initiation of random access on the target non-competitive random access channel resource corresponding to the candidate beam, which helps to reduce the time for wave speed failure recovery.

In the third aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

When the terminal device detects that a beam failure occurs and the received power of the first reference signal of each candidate beam is less than the preset reference signal received power, it continuously measures the reference signal received power for the preset duration on the candidate beam set, and determines that the restored beam is The candidate beam that meets the preset condition in the candidate beam set within the preset time period, and the restored beam is used to maintain normal communication between the terminal device and the base station;

It can be seen that, compared to the terminal device using the competitive random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of the present application, if each candidate beam in the candidate beam set is Cannot be used as a restored beam, then the set of candidate beams is continuously detected for a preset time, and the candidate beam that meets the restored beam conditions within the preset time is determined as the restored beam, and then initiated on the target non-competitive random access channel resource corresponding to the restored beam Random access, at this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The second reference signal received power is greater than or equal to the preset reference signal received power.

It can be seen that, in this example, the restored beam is a candidate beam whose second reference signal received power is greater than or equal to the preset reference signal received power in the set of candidate beams, and then a random random access channel resource is initiated on the target non-competitive random access channel resource corresponding to the restored beam. Access, the possibility that the beam failure recovery request fails to be sent at this time is small, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The second reference signal receiving power is greater than or equal to the preset reference signal receiving power, and the terminal device detects that the non-contention random access channel resource is idle at the earliest.

It can be seen that, in this example, the restored beam is the second reference signal received power in the candidate beam set being greater than or equal to the preset reference signal received power, and the terminal device detects the candidate beam whose non-competitive random access channel resources are idle at the earliest. The random access is initiated on the target non-competitive random access channel resource corresponding to the restored beam. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In a fourth aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

When the terminal device detects that a beam failure has occurred, and the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, the candidate beam set and the common beam set are continuously subjected to the reference signal received power for the preset duration Measure and determine that the restored beam is a set of candidate beams within the preset duration and a common beam that meets the preset conditions in the set of common beams. The common beam is configured by the base station and used to select the restored beam. The restored beam is used to maintain the gap between the terminal equipment and the base station. Normal communication between;

It can be seen that, compared to the terminal device using the competitive random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of the present application, if each candidate beam in the candidate beam set is Cannot be used as a restored beam, then the candidate beam set and the common beam set are continuously detected for the preset time, and the common beam that meets the preset conditions within the preset time is determined as the restored beam, and then the target corresponding to the restored beam is competed for the random access channel Random access is initiated on the resource, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The second reference signal received power of each candidate beam is less than the first preset reference signal received power, and the third reference signal received power is greater than or equal to the second preset reference signal received power.

It can be seen that in this example, the restored beam is the common value of the third reference signal received power in the common beam set that is greater than or equal to the second preset reference signal received power in the case that each candidate beam in the candidate beam set cannot be used as a restored beam. Beam, and then initiate random access on the target competition random access channel resource corresponding to the restored beam, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The received power of the second reference signal of each candidate beam is less than the received power of the first preset reference signal, the received power of the third reference signal is greater than or equal to the received power of the second preset reference signal, and the terminal device detects the competition for random access channel resources earliest idle.

It can be seen that, in this example, the restored beam is that when each candidate beam in the candidate beam set cannot be used as a restored beam, the third reference signal received power in the common beam set is greater than or equal to the second preset reference signal received power, and The terminal device detects the idle common beam that competes for random access channel resources at the earliest, and then initiates random access on the target competition random access channel resources corresponding to the restored beam, which helps to reduce the time for beam failure recovery.

In a fifth aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

Obtain the first reference signal received power of each candidate beam in the candidate beam set and the second reference signal received power of each common beam in the common beam set. Both the candidate beam set and the common beam set are configured by the base station and used for Select the restored beam;

When the terminal device detects that a beam failure has occurred, and the candidate beam set and the common beam set do not meet the first preset condition, the restored beam is determined to be the candidate beam that meets the second preset condition in the candidate beam set, and the restored beam is used to keep the terminal Normal communication between equipment and base station;

It can be seen that, compared to the terminal device using the competing random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of this application, if each candidate beam in the candidate beam set sums up If each common beam in the common beam set does not meet the recovery beam condition, then the candidate beam that meets the second preset condition is selected from the candidate beam set as the recovery beam, and then the target non-competition random access channel corresponding to the recovery beam Random access is initiated on the resource. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the first preset condition is:

The first reference signal receiving power of each candidate beam is less than the first preset reference signal receiving power, and the second reference signal receiving power of each common beam is less than the second preset reference signal receiving power.

In some possible implementation manners, the first preset condition is:

The received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, and the terminal device obtains the time when the received power of the second reference signal of each common beam is greater than or equal to the received power of the third preset reference signal and the time of failure The absolute value of is less than the preset duration, and the fault moment is the moment when the terminal device detects a beam fault.

In some possible implementation manners, the second preset condition is:

The first reference signal received power is greater than or equal to the fourth preset reference signal received power.

It can be seen that, in this example, the restored beam is a candidate beam whose first reference signal received power is greater than or equal to the fourth preset reference signal received power in the set of candidate beams, and is then used on the target non-competitive random access channel resource corresponding to the restored beam Random access is initiated. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the second preset condition is:

The received power of the first reference signal is greater than or equal to the received power of the fourth preset reference signal, and the non-contention random access channel resource that is first detected by the terminal device is idle.

It can be seen that in this example, the restored beam is the candidate beam in which the first reference signal received power is greater than or equal to the fourth preset reference signal received power in the set of candidate beams, and the non-competitive random access channel resource is first detected by the terminal equipment to be idle. Furthermore, random access is initiated on the target non-contention random access channel resource corresponding to the restored beam. At this time, the possibility of sending the beam failure recovery request is less likely to fail, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the received power of the first reference signal of each candidate beam is an average value of the received power of at least two third reference signals, and each of the received powers of the at least two third reference signals is received by the third reference signal. The power is obtained by the terminal equipment measuring the received power of the reference signal for each candidate beam.

It can be seen that, compared with the change of the terminal device attitude and/or the change of the competing random access channel, the measurement of the reference signal received power of the candidate beam is not stable enough, and it is easy to miss the target non-competitive random access channel resource corresponding to the candidate beam Initiate random access. In this example, the received power of the first reference signal of each candidate beam is the average of the received power of at least two third reference signals, which helps to reduce the measurement of the received power of the reference signal of the candidate beam The impact of instability will not miss the initiation of random access on the target non-competitive random access channel resource corresponding to the candidate beam, which helps to reduce the time for wave speed failure recovery.

In a sixth aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

When the terminal device detects that a beam failure has occurred, and the candidate beam set and the common beam set do not meet the first preset condition, continue to measure the reference signal received power for the first preset duration on the candidate beam set, and determine that the restored beam is the first The candidate beam that meets the second preset condition in the candidate beam set within the preset time period, and the restored beam is used to maintain normal communication between the terminal device and the base station;

It can be seen that, compared to the terminal device using the competing random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of this application, if each candidate beam in the candidate beam set sums up Each common beam in the common beam set cannot be used as a restored beam, then the candidate beam set is continuously detected for the first preset time period, and the candidate beam that meets the restored beam condition within the first preset time period is determined as the restored beam, and then Random access is initiated on the target non-competitive random access channel resource corresponding to the recovery beam. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the first preset condition is:

The first reference signal received power of each candidate beam is less than the first preset reference signal received power, and the terminal device obtains the second reference signal received power of each common beam greater than or equal to the third preset reference signal received power and the fault The absolute value of the time is less than the second preset duration, and the failure time is the time when the terminal device detects that the beam failure occurs.

In some possible implementation manners, the second preset condition is:

The third reference signal received power is greater than or equal to the first preset reference signal power.

It can be seen that, in this example, the restored beam is a candidate beam in the set of candidate beams whose third reference signal received power is greater than or equal to the first preset reference signal received power, and then on the target non-competitive random access channel resource corresponding to the restored beam Random access is initiated. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the second preset condition is:

The third reference signal received power is greater than or equal to the first preset reference signal power, and the terminal device detects that the non-contention random access channel resource is idle at the earliest.

It can be seen that, in this example, the restored beam is a candidate beam whose third reference signal received power in the set of candidate beams is greater than or equal to the first preset reference signal received power, and the terminal device detects that the non-competitive random access channel resource is idle at the earliest, and then Random access is initiated on the target non-contention random access channel resource corresponding to the restored beam. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In a seventh aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

When the terminal device detects that a beam failure occurs, and the candidate beam set and the common beam set do not meet the first preset condition, continue to measure the reference signal received power for the first preset duration on the candidate beam set and the common beam set, and determine the restoration The beam is a set of candidate beams within the first preset duration and a common beam that meets the second preset condition in the set of common beams, and the restored beam is used to maintain normal communication between the terminal device and the base station;

It can be seen that, compared to the terminal device using the competing random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of this application, if each candidate beam in the candidate beam set sums up Each common beam in the common beam set cannot be used as a restored beam, then the candidate beam set and the common beam set are continuously detected for the first preset duration, and the common beam that meets the second preset condition within the first preset duration is determined as The beam is restored, and random access is initiated on the target competition random access channel resource corresponding to the restored beam, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the first preset condition is:

In some possible implementation manners, the second preset condition is:

The third reference signal received power of each candidate beam is less than the first preset reference signal received power, and the fourth reference signal received power is greater than or equal to the third preset reference signal received power.

It can be seen that in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, then the common beam with the fourth reference signal receiving power in the common beam set greater than or equal to the third preset reference signal receiving power is used as the restored beam Beam, and then initiate random access on the target competition random access channel resource corresponding to the restored beam, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the second preset condition is:

The received power of the third reference signal of each candidate beam is less than the received power of the first preset reference signal, the received power of the fourth reference signal is greater than or equal to the received power of the third preset reference signal, and the terminal device first detects the competition for random access channel resources idle.

It can be seen that in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, then the fourth reference signal received power in the common beam set is greater than or equal to the third preset reference signal received power, and the terminal device is the earliest It is detected that a common beam with free contention random access channel resources is used as a recovery beam, and random access is initiated on the target competition random access channel resource corresponding to the recovery beam, which helps to reduce the time for beam failure recovery.

In an eighth aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

When the terminal device detects that a beam failure has occurred, and the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, the candidate beam set and the common beam set are continuously subjected to the reference signal received power for the preset duration Measure and determine that the restored beams are the candidate beam set within the preset duration and the candidate beams that meet the preset conditions in the common beam set. The common beam set is configured by the base station and used to select the restored beam. The restored beam is used to maintain the terminal equipment and the base station. Normal communication between;

It can be seen that, compared to the terminal device using the competitive random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of the present application, if each candidate beam in the candidate beam set is Cannot be used as a restored beam, then the candidate beam set and the common beam set are continuously detected for the preset time, and the candidate beam that meets the preset conditions within the preset time is determined as the restored beam, and then the target non-competitive random access corresponding to the restored beam Random access is initiated on the channel resources. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The second reference signal received power is less than the first preset reference signal received power and greater than or equal to the second preset reference signal received power, and the third reference signal received power of each common beam is less than the third preset reference signal received power.

It can be seen that, in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, and the third reference signal received power of each common beam in the common beam set is less than the third preset reference signal received power, Then, in the candidate beam set, the candidate beam whose second reference signal received power is less than the first preset reference signal received power and greater than or equal to the third preset reference signal received power is used as the restored beam, and then the target non-competitive random beam corresponding to the restored beam Random access is initiated on the access channel resource. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementations, the preset condition is:

The second reference signal received power is less than the first preset reference signal received power and greater than or equal to the second preset reference signal received power, the third reference signal received power of each common beam is less than the third preset reference signal received power, and the terminal The device detects that the non-contention random access channel resource is idle at the earliest.

It can be seen that, in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, and the third reference signal received power of each common beam in the common beam set is less than the third preset reference signal received power, Then the second reference signal received power in the candidate beam set is less than the first preset reference signal received power and greater than or equal to the third preset reference signal received power, and the terminal device detects the candidate beam whose non-competitive random access channel resources are idle at the earliest As a restored beam, random access is initiated on the target non-competitive random access channel resource corresponding to the restored beam. At this time, the possibility of sending a beam failure recovery request to fail is small, which helps to reduce the time for beam failure recovery .

In a ninth aspect, an embodiment of the present application provides a method for sending a beam failure recovery request, which is applied to a terminal device, and includes:

When the terminal device detects that a beam failure occurs, and the candidate beam set and the common beam set do not meet the first preset condition, continue to measure the reference signal received power for the first preset duration on the candidate beam set and the common beam set, and determine the restoration The beam is a candidate beam set within the first preset duration and a candidate beam satisfying a second preset condition in the common beam set, and the restored beam is used to maintain normal communication between the terminal device and the base station;

It can be seen that, compared to the terminal device using the competing random access channel resource with poor channel quality to send the beam failure recovery request to the base station by restoring the beam, in the embodiment of this application, if each candidate beam in the candidate beam set sums up Each public beam in the public beam set cannot be used as a restored beam, then the candidate beam set and the common beam set are continuously detected for the first preset duration, and the candidate beams satisfying the second preset condition within the first preset duration are determined as The beam is restored, and random access is initiated on the target non-contention random access channel resource corresponding to the restored beam. At this time, the beam failure recovery request is less likely to fail to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the first preset condition is:

In some possible implementation manners, the second preset condition is:

The third reference signal received power is less than the first preset reference signal received power and greater than or equal to the fourth preset reference signal received power, and the fourth reference signal received power of each common beam is less than the third preset reference signal received power.

It can be seen that in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, and the fourth reference signal received power of each common beam in the common beam set is less than the third preset reference signal received power, Then, the candidate beam whose third reference signal received power is less than the first preset reference signal received power and is greater than or equal to the fourth preset reference signal received power in the candidate beam set is used as the restored beam, and then the target non-competitive random beam corresponding to the restored beam Random access is initiated on the access channel resource. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the second preset condition is:

The third reference signal received power is less than the first preset reference signal received power and greater than or equal to the fourth preset reference signal received power, the fourth reference signal received power of each common beam is less than the third preset reference signal received power, and the terminal The device detects that the non-contention random access channel resource is idle at the earliest.

It can be seen that in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, and the fourth reference signal received power of each common beam in the common beam set is less than the third preset reference signal received power, Then the third reference signal received power in the candidate beam set is less than the first preset reference signal received power and greater than or equal to the fourth preset reference signal received power, and the terminal device detects the candidate beam whose non-competitive random access channel resource is idle at the earliest As a restored beam, random access is initiated on the target non-competitive random access channel resource corresponding to the restored beam. At this time, the possibility of sending a beam failure recovery request to fail is small, which helps to reduce the time for beam failure recovery .

In a tenth aspect, an embodiment of the present application provides a terminal device, including:

An obtaining unit, configured to obtain the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam;

The determining unit is configured to determine that the restored beam is one of the common beam set that meets the preset condition when the terminal device detects that a beam failure has occurred and the first reference signal received power of each candidate beam is less than the first preset reference signal received power Public beam, the set of public beams is configured by the base station and used to select the recovery beam, and the recovery beam is used to maintain normal communication between the terminal equipment and the base station;

The determining unit is further configured to obtain the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

The sending unit is configured to send a beam failure recovery request to the base station by using the target competition random access channel resource by recovering the beam.

In an eleventh aspect, an embodiment of the present application provides a terminal device. The terminal device includes a processor, a communication interface, and a memory coupled with each other, wherein:

A processor, configured to obtain the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam;

The processor is further configured to: when the terminal device detects that a beam failure occurs and the first reference signal received power of each candidate beam is less than the first preset reference signal received power, determine that the restored beam is a common beam set that meets the preset condition The public beam set is configured by the base station and used to select the recovery beam, and the recovery beam is used to maintain normal communication between the terminal equipment and the base station;

The processor is further configured to obtain the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

The communication interface is used to send a beam failure recovery request to the base station by using the target random access channel resource through the recovery beam.

In a twelfth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, and the computer program is executed by hardware (such as a processor, etc.) to implement any of the terminal devices in the embodiments of the present application. Part or all of the steps of the method.

In a thirteenth aspect, the embodiments of the present application provide a computer program product. When the computer program product runs on the beam failure recovery request sending apparatus, the terminal device is caused to perform some or all of the steps of the beam failure recovery request sending method in the above aspects. .

In a fourteenth aspect, an embodiment of the present application provides a chip system. The chip system includes a processor for supporting a terminal device to implement part or all of the steps of the beam failure recovery request sending method in the above aspects.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings that need to be used in the embodiments of the present application or the background art.

FIG. 1 is a schematic diagram of a beam normal and beam failure scenario provided by an embodiment of the present application;

2A is a schematic flowchart of a method for sending a beam failure recovery request according to an embodiment of the present application;

2B is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

2C is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

2D is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

2E is a schematic diagram of a first common beam provided by an embodiment of the present application;

2F is a schematic diagram of sending a beam failure recovery request according to an embodiment of the present application;

FIG. 3 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

4 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

5 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

6 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

7A is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

FIG. 7B is a schematic diagram of another beam failure recovery request sending according to an embodiment of the present application;

8 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

9 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

FIG. 10 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application;

FIG. 11 is a block diagram of functional units of a terminal device provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a chip system provided by an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

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

(1) A terminal device is a device that inputs programs and data to a computer via a communication facility or receives the computer's output processing results.

(2) A dual-polarized beam is a beam emitted by a dual-polarized antenna.

(3) The candidate beam set includes multiple candidate beams that use non-competitive random access channel resources to transmit signals.

(4) The common beam set includes multiple common beams that use competing random access channel resources to transmit signals.

(5) The reference signal received power is the linear average value of the received power (in watts) of the received power (in watts) of the resource element (Resource Element, RE) carrying the reference signal on the considered measurement frequency bandwidth.

Refer to Figure 1. Figure 1 is a schematic diagram of a beam normal and beam failure scenario provided by an embodiment of the present application. Figure 1 includes Figures (a) and Figure (b). Figure (a) includes terminal equipment and base stations. The beam between the terminal and the base station is not blocked, so the communication between the terminal equipment and the base station is normal, that is, the beam is normal; Figure (b) includes terminal equipment, buildings and base stations, because the beam between the terminal equipment and the base station exists The situation of being blocked, that is, the building blocks the beam of the terminal device and the base station at the line of sight (LOS), which results in abnormal communication between the terminal device and the base station, that is, beam failure.

Currently, the first type of beam failure recovery request sending process is: if the base station only configures multiple candidate beams for the terminal device, then when the terminal device detects a beam failure, first, the terminal device will select from multiple candidate beams that satisfy The candidate beam of the restored beam condition is used as the restored beam; then, the terminal device obtains the target non-competitive random access channel resource corresponding to the restored beam; finally, the terminal device uses the target non-competitive random access channel resource to send the beam failure recovery to the base station through the restored beam request. In the process of sending the beam failure recovery request, due to the change of the posture of the terminal equipment and/or the change of the non-competitive random access channel, the measurement of the reference signal received power of the candidate beam will be unstable, so the terminal equipment may miss the recovery The beam uses non-contention random access channel resources to send a beam failure recovery request to the base station, thereby increasing the time for beam failure recovery.

Currently, the second type of beam failure recovery request sending process is: if the base station does not configure multiple candidate beams for the terminal device but configures multiple common beams for the terminal device, then when the terminal device detects a beam failure, first, the terminal device The common beam that meets the threshold condition will be selected from multiple common beams as the restored beam; then, the terminal device obtains the target to compete for the random access channel resource corresponding to the restored beam; finally, the terminal device uses the poorer channel quality competition random access channel resource through the restored beam The access channel resource sends a beam failure recovery request to the base station. Since the channel quality of competing for random access channel resources is poor, the beam failure recovery request is more likely to fail to be sent, which may increase the time for beam failure recovery.

Currently, the third type of beam failure recovery request sending process is: if the base station does not configure a timer for the terminal device but configures multiple candidate beams and multiple common beams for the terminal device, then when the terminal device detects a beam failure, first If multiple candidate beams cannot be used as recovery beams, the terminal device will select a common beam that meets the threshold condition from the multiple public beams as the recovery beam; then, the terminal device obtains the target for the recovery beam and competes for random access channel resources ; Finally, the terminal device sends a beam failure recovery request to the base station by restoring the beam to use a competing random access channel resource with poor channel quality. Due to competition for random access channel resources, the channel quality is considered to be poor, so the beam failure recovery request is more likely to fail to be sent, which may increase the time for beam failure recovery.

Currently, the fourth type of beam failure recovery request sending process is: if the base station configures the terminal device with a timer and configures the terminal device with multiple candidate beams and multiple common beams, then when the terminal device detects a beam failure, first, If multiple candidate beams cannot be used as recovery beams within the preset duration, the terminal device will select the common beam that meets the threshold condition from the multiple public beams as the recovery beam after the preset duration; then, the terminal device obtains the recovery beam The corresponding target competes for random access channel resources; finally, the terminal device sends a beam failure recovery request to the base station by restoring the beam to use the competing random access channel resource with poor channel quality. Since the channel quality of competing for random access channel resources is poor, the beam failure recovery request is more likely to fail to be sent, which may increase the time for beam failure recovery.

The embodiment of the application provides a method for sending a beam failure recovery request, which reduces the impact of instability in the measurement of the reference signal received power of the candidate beam, or uses a competitive random access channel with better channel quality by recovering the beam The resource sends a beam failure recovery request to the base station, thereby reducing the possibility of competition failure in contention-based random access, thereby achieving the purpose of reducing the time for beam failure recovery.

Referring to FIG. 2A, FIG. 2A is a schematic flowchart of a beam failure recovery request sending according to an embodiment of the present application. The beam failure recovery request sending method includes steps A1-A8, which are specifically as follows:

A1: The terminal device uses a dual-polarized beam to receive multiple detection reference signals.

A2: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set and the second reference signal received power of each common beam in the common beam set. The candidate beam set and the common beam set are both base station configurations. And used to select the recovery beam.

A3: The terminal device performs a block error rate statistical operation on multiple detection reference signals to obtain multiple block error rates, and the multiple block error rates correspond to multiple detection reference signals one-to-one.

Optionally, in the process of the terminal device performing the block error rate statistics operation on the multiple detection reference signals, the terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set and each of the common beam set The received power of the second reference signal of the common beam.

A4: The terminal equipment judges whether beam failure occurs according to multiple block error rates;

If yes, the terminal device executes step A5.

If not, the terminal device executes step A1.

There are multiple implementation manners for the terminal device to detect whether a beam failure occurs. The above steps A1, A3, and A4 are only one possible implementation manner among multiple implementation manners for the terminal device to detect whether a beam failure occurs; in another possible implementation manner, The terminal device can also use a single-polarized beam to receive multiple detection reference signals, perform block error rate statistical operations on the multiple detection reference signals, obtain multiple block error rates, and determine whether beam failure occurs based on the multiple block error rates.

A5: The terminal device selects a restored beam from the candidate beam set and the common beam set according to the first reference signal received power of each candidate beam and the second reference signal received power of each common beam. The restored beam is used to keep the terminal device and the base station Normal communication between.

In the case where the base station configures a timer for the terminal device and the start time of the timer is the moment when the terminal device detects the beam failure, if the timer does not expire, the terminal device can receive power according to the first reference signal of each candidate beam Select the restoration beam from the set of candidate beams; if the timer expires, the terminal device can select the restoration beam from the set of common beams according to the second reference signal received power of each common beam.

A6: The terminal device determines the target random access channel resource corresponding to the restored beam according to the mapping relationship between the beam and the random access channel resource.

A7: The terminal device uses the target random access channel resource to send a beam failure recovery request to the base station through the recovery beam.

A8: If the terminal device receives the response of the base station to the beam failure recovery request, the terminal device determines that the beam failure recovery is successful.

Referring to FIG. 2B, FIG. 2B is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps B1-B18, which are specifically as follows:

B1: The terminal device uses a dual-polarized beam to receive multiple detection reference signals.

The multiple detection reference signals may be individually configured by the terminal equipment, or may be configured jointly by the terminal equipment and the base station, and the multiple detection reference signals are used to determine whether a beam failure occurs. Both the terminal equipment and the base station configure the detection reference signal through radio resource control. If multiple detection reference signals are configured by the terminal equipment and the base station, the base station can configure at most two detection reference signals,

If the beams that receive multiple detection reference signals are obtained through beam management, the terminal device can use dual-polarized beams to receive multiple detection reference signals through the beam management stage; if the beams that receive multiple detection reference signals are obtained through beam training Yes, the terminal device can use dual-polarized beams to receive multiple detection reference signals through the beam training phase; if the beams that receive multiple detection reference signals are obtained by searching for the quasi co-location relationship between the signals and are single-polarized beams , Then the terminal device keeps the polarization direction unchanged when using the beam, and opens another polarization direction to receive multiple detection reference signals at the same time.

B2: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set and the second reference signal received power of each common beam in the common beam set. Both the candidate beam set and the common beam set are base station configurations. And used to select the recovery beam.

The terminal device can periodically measure the reference signal received power of the candidate beam set and the common beam set to obtain the first reference signal received power of each candidate beam in the candidate beam set and the first reference signal received power of each common beam in the common beam set. 2. Reference signal received power.

The received power of the first reference signal of each candidate beam may be the average value of the received power of at least two fourth reference signals, and the received power of each fourth reference signal of the at least two fourth reference signal received powers is the value of the terminal device's The received power of the first reference signal of each candidate beam can also be the weighted average of the received power of at least two fifth reference signals. Among the received power of the at least two fifth reference signals, The received power of each fifth reference signal is obtained by the terminal device performing the reference signal received power measurement of each candidate beam, and at least two weights may be configured by the terminal device; the above are only exemplary descriptions and should not be understood as candidate beams The limit of how to obtain the received power of the reference signal.

For example, as shown in Table 1 below, the two candidate beams are candidate beam 1 including candidate reference signal CSI-RS#1 and candidate beam 2 including candidate reference signal CSI-RS#2. The terminal device responds to candidate beam 1. The three reference signal received powers (RSRP) obtained by performing three reference signal received power measurements are -100dBm, -105dBm and -110dBm respectively, then the reference signal received power (RSRP) of candidate beam 1 is: [(-100dBm)+ (-105dBm)+(-110dBm)]/3=-105dBm, the terminal equipment performs three reference signal receive power measurements on candidate beam 2 and the three reference signal receive powers are -98dBm, -90dBm and -97dBm, then The reference signal received power (RSRP) of candidate beam 2 is: [(-98dBm)+(-90dBm)+(-97dBm)]/3=-95dBm.

Table 1

候选参考信号Candidate reference signal	候选波束Candidate beam	RSRP1RSRP1	RSRP2RSRP2	RSRP3RSRP3	候选波束的RSRPRSRP of candidate beam
CSI-RS#1CSI-RS#1	候选波束1Candidate beam 1	-100dBm-100dBm	-105dBm-105dBm	-110dBm-110dBm	-105dBm-105dBm
CSI-RS#2CSI-RS#2	候选波束2Candidate beam 2	-98dBm-98dBm	-90dBm-90dBm	-97dBm-97dBm	-95dBm-95dBm

It can be seen that, compared with the change of the terminal device attitude and/or the change of the competing random access channel, the measurement of the reference signal received power of the candidate beam is not stable enough, and it is easy to miss the target non-competitive random access channel resource corresponding to the candidate beam Initiate random access, because the received power of the first reference signal of each candidate beam is the average of the received power of at least two fourth reference signals, which helps to reduce the measurement of the reference signal received power of the candidate beam is not stable enough In turn, it will not miss the initiation of random access on the target non-competitive random access channel resource corresponding to the candidate beam, which helps to reduce the time for beam failure recovery.

The received power of the second reference signal of each common beam may be the average value of the received power of at least two sixth reference signals, and the received power of each of the at least two sixth reference signal received powers is determined by the terminal device's The received power of the second reference signal of each common beam can also be the weighted average of the received power of at least two seventh reference signals. The received power of each seventh reference signal of is obtained by the terminal device performing the reference signal received power measurement of each common beam, and at least two weights can be configured by the terminal device; the above is only an example and should not be understood as a common beam The limit of how to obtain the received power of the reference signal.

For example, as shown in Table 2 below, the three common beams are the common beam 3 including the common reference signal SSB#1, the common beam 4 including the common reference signal SSB#2, and the common beam including the common reference signal SSB#3. 5. The three reference signal received powers (RSRP) obtained by the terminal equipment on the public beam 3 through three reference signal received power measurements are -95dBm, -94dBm and -108dBm, then the reference signal received power (RSRP) of the public beam 3 It is: [(-95dBm)+(-94dBm)+(-108dBm)]/3=-99dBm, the terminal equipment performs three reference signal receiving power measurements on the public beam 4 and the three reference signal receiving powers are -110dBm respectively , -105dBm and -112dBm, then the reference signal received power (RSRP) of the common beam 4 is: [(-110dBm)+(-105dBm)+(-112dBm)]/3=-109dBm, and the terminal equipment performs the common beam 5 The three reference signal received powers obtained by the three reference signal received power measurements are -102dBm, -97dBm and -95dBm respectively, then the reference signal received power (RSRP) of the common beam 5 is: [(-102dBm)+(-97dBm) +(-95dBm)]/3=-98dBm.

Table 2

公共参考信号Common reference signal	公共波束Public beam	RSRP1RSRP1	RSRP2RSRP2	RSRP3RSRP3	公共波束的RSRPRSRP for public beams
SSB#1SSB#1	公共波束1Public beam 1	-95dBm-95dBm	-94dBm-94dBm	-108dBm-108dBm	-99dBm-99dBm
SSB#2SSB#2	公共波束2Public beam 2	-110dBm-110dBm	-105dBm-105dBm	-112dBm-112dBm	-109dBm-109dBm
SSB#3SSB#3	公共波束3Public beam 3	-102dBm-102dBm	-97dBm-97dBm	-95dBm-95dBm	-98dBm-98dBm

It can be seen that, compared with the change of the terminal equipment's attitude and/or the change of the competition random access channel, the measurement of the reference signal received power of the public beam is not stable enough, and it is easy to miss the launch of the target competition random access channel resource corresponding to the public beam. Random access. In this example, the received power of the second reference signal of each common beam is the average value of the received power of at least two sixth reference signals, which helps to reduce the insufficient measurement of the received power of the reference signal of the common beam The impact of stability is not missed, and random access is initiated on the target competition random access channel resource corresponding to the public beam, which helps to reduce the time for beam failure recovery.

B3: The terminal device performs a block error rate statistical operation on multiple detection reference signals to obtain multiple block error rates, and the multiple block error rates correspond to the multiple detection reference signals one-to-one.

The block error rate is the percentage of blocks sent in error (only the block transmitted for the first time).

B4: The terminal equipment judges whether beam failure occurs according to multiple block error rates;

If yes, the terminal device executes step B5.

If not, the terminal device executes step B1.

First, the terminal device determines whether each of the multiple block error rates is greater than or equal to the preset block error rate; then, the terminal device obtains the number of block error rates greater than or equal to the preset block error rate; finally, if the block error rate is If the number of rate is greater than or equal to the preset block error rate is greater than or equal to the preset number, then the terminal device determines that a beam failure has occurred; if multiple detection reference signals are separately configured by the terminal device, the preset block error rate can be configured by the terminal device For example, the preset block error rate is 10%; if multiple detection reference signals are configured jointly by the terminal equipment and the base station, the preset block error rate can be configured by the base station, for example, the preset block error rate is 10%; judge Whether each of the multiple block error rates is greater than or equal to the preset block error rate is determined by the physical layer of the terminal device. Recording the number of block error rates greater than or equal to the preset block error rate is completed by a counter of the media access control layer of the terminal device. The preset number can be configured by the terminal device. If the terminal device does not determine that the block error rate is greater than or equal to the preset block error rate within a period of time, the media access control layer of the terminal device clears the counter.

It can be seen that compared to using a single-polarized beam to receive multiple detection reference signals, polarization mismatch is prone to occur. Because a dual-polarized beam is used to receive multiple detection reference signals, the multiple detection reference signals are used to determine whether a beam occurs. Failure, which helps to avoid the influence of polarization mismatch on the reception of multiple detection reference signals, thereby improving the accuracy of determining whether a beam failure occurs.

There are multiple implementation manners for the terminal device to detect whether a beam failure occurs. The above steps B1, B3, and B4 are only one possible implementation manner among multiple implementation manners for the terminal device to detect whether a beam failure occurs; in another possible implementation manner, The terminal device can also use a single-polarized beam to receive multiple detection reference signals, perform block error rate statistical operations on the multiple detection reference signals, obtain multiple block error rates, and determine whether beam failure occurs based on the multiple block error rates.

B5: If the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, the terminal device determines whether there is a public beam that meets the first preset condition in the public beam set;

If yes, go to step B6-AB.

If not, proceed to step B10.

The received power of the first preset reference signal may be configured by the base station.

In some possible implementation manners, the first preset condition may be:

The second reference signal received power is greater than or equal to the third preset reference signal received power, the third preset reference signal received power is the sum of the second preset reference signal received power and the preset power value, and the second preset reference signal received power It may be configured by the base station, and the preset power value may be configured by the terminal device.

It can be seen that since the restored beam is a common beam in the set of common beams whose second reference signal received power is greater than or equal to the third preset reference signal received power, it then competes for random access channel resources on the target with better channel quality corresponding to the restored beam Random access is initiated. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the first preset condition may also be:

The absolute value of the time when the terminal device obtains the second reference signal receiving power greater than or equal to the second preset reference signal receiving power and the failure time is less than the second preset duration, the failure time is the time when the terminal device detects a beam failure, and the second prediction The set duration can be configured by the terminal device.

The time when the terminal device obtains the second reference signal received power greater than or equal to the second preset reference signal received power may be the time at which the second reference signal received power is detected to be greater than or equal to the second preset reference signal received power last time before the fault time.

It can be seen that since the restored beam is a common beam whose absolute value between the time when the second reference signal received power is greater than or equal to the second preset reference signal received power and the failure time in the common beam set is less than the second preset duration, the restored beam corresponds to Targets with better channel quality compete for random access channel resources to initiate random access. At this time, the beam failure recovery request is less likely to fail to send, which helps to reduce the time for beam failure recovery.

The second reference signal received power is greater than or equal to the third preset reference signal received power, and the terminal device detects that the competing random access channel resource is idle at the earliest.

It can be seen that because the restored beam is the received power of the second reference signal in the public beam set greater than or equal to the third preset reference signal received power, and the terminal device detects the public beam that competes for the free random access channel resources at the earliest, the restored beam corresponds to Targets with better channel quality compete for random access channel resources to initiate random access. At this time, the beam failure recovery request is less likely to fail to send, which helps to reduce the time for beam failure recovery.

The absolute value of the time when the terminal device obtains the second reference signal receiving power greater than or equal to the second preset reference signal receiving power and the failure time is less than the second preset duration, and the terminal device detects that the competing random access channel resource is idle at the earliest, and the failure time It is the moment when the terminal device detects the beam failure.

It can be seen that because the restored beam is the absolute value of the second reference signal received power greater than or equal to the second preset reference signal received power in the common beam set and the failure time is less than the second preset duration, and the terminal device detects the competition random access earliest. Enter the public beam with free channel resources, and then initiate random access on the random access channel resource competition for the target with good channel quality corresponding to the restored beam. At this time, the possibility of failure to send the speed failure recovery request is less, which is helpful To reduce the time for beam failure recovery.

The above is only an exemplary description of the first preset condition, and should not be understood as a limitation on the first preset condition.

Optionally, in the case that the base station configures a timer for the terminal device, if there is a common beam that meets the first preset condition in the common beam set but the timer does not expire, the terminal device continuously obtains each candidate in the candidate beam set The fourth reference signal received power of the beam; if there is a candidate beam in the candidate beam set whose fourth reference signal received power is greater than or equal to the first preset reference signal received power, the terminal device sets the fourth reference signal received power in the candidate beam set to be greater than The candidate beam equal to the received power of the first preset reference signal is determined to be the restored beam.

B6: The terminal device determines the public beam that meets the first preset condition in the public beam set as the restored beam, and the restored beam is used to maintain normal communication between the terminal device and the base station.

B7: The terminal device determines the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competing random access channel resource.

The mapping relationship between the common beam and the competing random access channel resources can be configured by the base station. The competing random access channel resources can be time-frequency domain resources. The mapping relationship between the common beam and the competing random access channel resources is shown in Table 3:

table 3

公共波束Public beam	竞争随机接入信道资源Competing for random access channel resources
公共波束1Public beam 1	竞争随机接入信道资源1Competing for random access channel resources 1
公共波束2Public beam 2	竞争随机接入信道资源2Competition for random access channel resources 2
公共波束3Public beam 3	竞争随机接入信道资源3Competition for random access channel resources 3
……...	……...

If the public beam is the public beam 1, the competition for random access channel resources is the competition for random access channel resources 1; if the public beam is the public beam 2, the competition for random access channel resources is the competition for random access channel resources 2; The beam is the common beam 3, and the competition for random access channel resources is the competition for random access channel resources 3.

Optionally, if the target competition random access channel resource corresponding to the recovery beam is currently busy, the terminal device waits for the target competition random access channel resource corresponding to the recovery beam until it is idle, and then uses the target competition random access channel resource to the target through the recovery beam. The base station sends a beam failure recovery request.

Optionally, if the target competition random access channel resource corresponding to the recovery beam is currently busy, the terminal device continuously obtains the fourth reference signal received power of each candidate beam in the candidate beam set; if there is a fourth reference in the candidate beam set If the signal receiving power is greater than or equal to the candidate beam of the first preset reference signal receiving power, the terminal device determines the candidate beam having the fourth reference signal receiving power greater than or equal to the first preset reference signal receiving power in the candidate beam set as the restored beam, and then Obtain the target non-contention random access channel resource corresponding to the recovery beam according to the mapping relationship between the candidate beam and the non-contention random access channel resource; and use the target non-contention random access channel resource to send a beam failure recovery request to the base station through the recovery beam.

B8: The terminal device sends a beam failure recovery request to the base station by using the target competition random access channel resource by recovering the beam.

B9: If the terminal device receives the response of the base station to the beam failure recovery request, the terminal device determines that the beam failure recovery is successful.

B10: The terminal device continuously measures the reference signal received power for the first preset duration on the candidate beam set, and the terminal device determines whether there is a candidate beam that meets the second preset condition in the candidate beam set within the first preset duration;

If yes, the terminal device executes steps B11-B14.

If not, the terminal device executes steps B15-B18.

The first preset duration may be determined by the terminal device according to the historical measurement result or the sensor value of the terminal device; the first preset duration is determined by the terminal device according to the historical measurement result, and the historical measurement result is determined by the terminal device within a certain period of time. In the case of the difference between the average value of the received power of all reference signals obtained by the reference signal received power measurement of the candidate beam set and the first preset reference signal received power, if the difference is [0,5], then the first preset The duration can be 500ms; if the difference is [10, +∞], then the first preset duration can be 100ms. In the case where the first preset duration is determined by the terminal device according to the historical measurement result and the historical measurement result is the change in the acceleration count value of the terminal device within a certain period of time, if the acceleration count value changes to [0, 2], then the first A preset duration can be 100ms; if the acceleration count value changes to [2,5], then the first preset duration can be 200ms; if the acceleration count value changes to [5,10], then the first preset duration can be 500ms. The foregoing is only an exemplary description, which is not limited here.

In some possible implementation manners, the second preset condition may be:

The received power of the fourth reference signal is greater than or equal to the received power of the first preset reference signal.

It can be seen that because the restored beam is a candidate beam with the fourth reference signal received power greater than or equal to the first preset reference signal received power in the set of candidate beams, random access is initiated on the target non-competitive random access channel resource corresponding to the restored beam At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the second preset condition may also be:

The fourth reference signal received power is greater than or equal to the first preset reference signal received power, and the terminal device detects that the non-contention random access channel resource is idle at the earliest.

It can be seen that because the recovered beam is the fourth reference signal received power in the set of candidate beams greater than or equal to the first preset reference signal received power, and the terminal device detects the candidate beam whose non-competitive random access channel resources are idle at the earliest, it is then used for the recovery beam The random access is initiated on the corresponding target non-contention random access channel resource. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

B11: The terminal device determines the candidate beam that meets the second preset condition in the set of candidate beams within the first preset duration as the restored beam, and the restored beam is used to maintain normal communication between the terminal device and the base station.

B12: The terminal device determines the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

The mapping relationship between candidate beams and non-competitive random access channel resources can be configured by the base station. Non-competitive random access channel resources can be time-frequency domain resources. The mapping relationship between candidate beams and non-competitive random access resources is shown in Table 4 below. Show:

Table 4

候选波束Candidate beam	非竞争随机接入信道资源Non-competitive random access channel resources
候选波束1Candidate beam 1	非竞争随机接入信道资源1Non-competitive random access channel resource 1
候选波束2Candidate beam 2	非竞争随机接入信道资源2Non-competitive random access channel resource 2
候选波束3Candidate beam 3	非竞争随机接入信道资源3Non-competitive random access channel resources 3
……...	……...

If the candidate beam is candidate beam 1, the non-competitive random access channel resource is non-competitive random access channel resource 1; if the candidate beam is candidate beam 2, the non-competitive random access channel resource is non-competitive random access channel resource 2; If the candidate beam is candidate beam 3, the non-competitive random access channel resource is non-competitive random access channel resource 3.

B13: The terminal device uses the target non-contention random access channel resource to send a beam failure recovery request to the base station by restoring the beam.

B14: If the terminal device receives the response of the base station to the beam failure recovery request, the terminal device determines that the beam failure recovery is successful.

B15: The terminal device determines that the restored beam is a common beam with the third reference signal receiving power greater than or equal to the second preset reference signal receiving power in the common beam set, and the restored beam is used to maintain normal communication between the terminal device and the base station.

It can be seen that since the restored beam is a common beam with the third reference signal receiving power greater than or equal to the second preset reference signal receiving power in the common beam set, random access is initiated on the target competition random access channel resource corresponding to the restored beam, This helps to reduce the time for beam failure recovery.

B16: The terminal device determines the target competition random access channel resource corresponding to the recovery beam according to the mapping relationship between the common beam and the competing random access channel resource.

Refer to the description of step B7 for step B16, which will not be described here.

B17: The terminal device sends a beam failure recovery request to the base station by using the target competition random access channel resource by recovering the beam.

B18: If the terminal device receives the response of the base station to the beam failure recovery request, the terminal device determines that the beam failure recovery is successful.

Referring to FIG. 2C, FIG. 2C is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps C1-C18, which are specifically as follows:

C1: The terminal device uses a dual-polarized beam to receive multiple detection reference signals.

C2: The terminal device obtains the first reference signal receiving power of each candidate beam in the candidate beam set and the second reference signal receiving power of each common beam in the common beam set. Both the candidate beam set and the common beam set are base station configurations. And used to select the recovery beam.

C3: The terminal device performs a block error rate statistical operation on multiple detection reference signals to obtain multiple block error rates, and the multiple block error rates correspond to the multiple detection reference signals one-to-one.

C4: The terminal equipment judges whether beam failure occurs according to multiple block error rates;

If yes, the terminal device executes step C5.

If not, the terminal device executes step C1.

There are multiple implementation manners for the terminal device to detect whether a beam failure occurs. The above steps C1, C3, and C4 are only one possible implementation manner among multiple implementation manners for the terminal device to detect whether a beam failure occurs; in another possible implementation manner, The terminal device can also use a single-polarized beam to receive multiple detection reference signals, perform block error rate statistical operations on the multiple detection reference signals, obtain multiple block error rates, and determine whether beam failure occurs based on the multiple block error rates.

C5: If the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, the terminal device determines whether there is a common beam that meets the preset condition in the set of common beams;

If yes, proceed to steps C6-C9.

If not, go to step C10.

C6: The terminal device determines the public beam that meets the preset condition in the public beam set as the restored beam, and the restored beam is used to maintain normal communication between the terminal device and the base station.

C7: The terminal device determines the target competition random access channel resource corresponding to the recovery beam according to the mapping relationship between the common beam and the competing random access channel resource.

C8: The terminal device sends a beam failure recovery request to the base station by using the target competition random access channel resource by restoring the beam.

C9: If the terminal device receives the response of the base station to the beam failure recovery request, the terminal device determines that the beam failure recovery is successful.

For steps C1-C9, refer to the description of steps B1-B9, which will not be described here.

C10: The terminal device determines whether there is a candidate beam whose first reference signal received power is greater than or equal to the second preset reference signal received power in the candidate beam set;

If yes, proceed to steps C11-C14.

If not, perform steps C15-C18.

The second preset reference signal receiving power may be configured by the terminal device.

The difference between the received power of the first preset reference signal and the received power of the second preset reference signal may be determined by the terminal device according to the historical measurement result or the sensor value of the terminal device; Suppose that the difference in the received power of the reference signal is determined by the terminal device according to the historical measurement result and the historical measurement result is the variance of the received power of all the reference signals obtained by the terminal device in a certain period of time by measuring the reference signal received power of the candidate beam set. Next, if the variance is [0,1], then the difference between the received power of the first preset reference signal and the second preset reference signal can be 1dBm; if the variance is [1,3], then the first preset The difference between the received power of the reference signal and the received power of the second preset reference signal may be 2dBm; if the variance is [3, +∞], then the difference between the received power of the first preset reference signal and the received power of the second preset reference signal The value can be 3dBm. The difference between the received power of the first preset reference signal and the received power of the second preset reference signal is determined by the terminal device according to the sensor value of the terminal device, and the sensor value of the terminal device is the acceleration count value of the terminal device within a certain period of time In the case of change, if the acceleration count value changes to [0,2], the difference between the received power of the first preset reference signal and the second preset reference signal can be 1dBm; if the acceleration count value changes to [2 ,5], then the difference between the received power of the first preset reference signal and the received power of the second preset reference signal can be 2dBm; if the acceleration count value changes to [5,10], then the first preset reference signal received power The difference between the received power and the second preset reference signal may be 3 dBm. The foregoing is only an exemplary description, which is not limited here.

C11: The terminal device determines the candidate beam with the first reference signal receiving power greater than or equal to the second preset reference signal receiving power in the candidate beam set as the restored beam, and the restored beam is used to maintain normal communication between the terminal device and the base station.

It can be seen that, because the restored beam is a candidate beam whose first reference signal received power is greater than or equal to the second preset reference signal received power in the set of candidate beams, random access is initiated on the target non-competitive random access channel resource corresponding to the restored beam. Access, the possibility that the beam failure recovery request fails to be sent at this time is small, which helps to reduce the time for beam failure recovery.

C12: The terminal device determines the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

Refer to the description of step B12 for step C12, which will not be described here.

C13: The terminal device uses the target non-contention random access channel resource to send a beam failure recovery request to the base station by restoring the beam.

C14: If the terminal device receives the response of the base station to the beam failure recovery request, the terminal device determines that the beam failure recovery is successful.

C15: The terminal device determines that the restored beam is a common beam with the second reference signal receiving power greater than or equal to the third preset reference signal receiving power in the common beam set, and the restored beam is used to maintain normal communication between the terminal device and the base station.

The third preset reference signal received power may be configured by the base station.

It can be seen that because the restored beam is a common beam with the second reference signal receiving power greater than or equal to the third preset reference signal receiving power in the common beam set, random access is initiated on the target competition random access channel resource corresponding to the restored beam, This helps to reduce the time for beam failure recovery.

C16: The terminal device determines the target competition random access channel resource corresponding to the recovery beam according to the mapping relationship between the common beam and the competing random access channel resource.

For step C16, refer to the description of step B7, which will not be described here.

C17: The terminal device sends a beam failure recovery request to the base station by using the target competition random access channel resource by restoring the beam.

C18: If the terminal device receives the response of the base station to the beam failure recovery request, the terminal device determines that the beam failure recovery is successful.

Referring to FIG. 2D, FIG. 2D is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps 201-204, which are specifically as follows:

201: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam.

In the process in which the terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set, the terminal device also obtains the second reference signal received power of each common beam in the common beam set.

In a possible implementation manner, the second reference signal received power of each common beam is the average value of at least two third reference signal received powers, and each of the at least two third reference signal received powers The power is obtained by measuring the received power of the reference signal of each common beam by the terminal device; the received power of the second reference signal of each common beam may also be a weighted average of the received power of at least two sixth reference signals, and at least two Each of the six reference signal received powers in the six reference signal received powers is obtained by the terminal device through the reference signal received power measurement of each common beam, and at least two weights may be configured by the terminal device; the above is only an example description. It should not be understood as a limitation of the way in which the reference signal received power of the common beam is obtained.

It can be seen that, compared with the change of the terminal equipment's attitude and/or the change of the competition random access channel, the measurement of the reference signal received power of the public beam is not stable enough, and it is easy to miss the launch of the target competition random access channel resource corresponding to the public beam. Random access. In this example, the received power of the second reference signal of each common beam is the average of the received power of at least two third reference signals, which helps to reduce the insufficient measurement of the received power of the reference signal of the common beam The impact of stability is not missed, and random access is initiated on the target competition random access channel resource corresponding to the public beam, which helps to reduce the time for beam failure recovery.

202: When the terminal device detects that a beam failure occurs, and the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, the terminal device determines that the restored beam is a common beam that meets the preset conditions in the common beam set. The beam, the common beam set is configured by the base station and used to select the recovery beam, and the recovery beam is used to maintain normal communication between the terminal device and the base station.

There are multiple implementation manners for the terminal device to detect the occurrence of a beam failure. In some embodiments, the terminal device detects that a beam failure occurs. Refer to the relevant description of steps B1-B4, which will not be described here; in other embodiments, the terminal device also You can use a single-polarized beam to receive multiple detection reference signals, perform block error rate statistics operations on multiple detection reference signals, and obtain multiple block error rates. If the block error rate is greater than or equal to the preset block error rate, the number is greater than or equal to the preset block error rate. Set the number, then the terminal equipment determines that a beam failure occurs.

In some possible implementations, the preset condition may be:

The second preset reference signal received power is the sum of the third preset reference signal received power and the preset power value, the third preset reference signal received power may be configured by the base station, and the preset power value may be configured by the terminal device.

It can be seen that, in this example, the restored beam is a common beam in the set of common beams whose second reference signal received power is greater than the second preset reference signal received power, and the target with better channel quality corresponding to the restored beam competes for random access. Random access is initiated on the channel resources. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the preset condition may also be:

For example, as shown in FIG. 2E, FIG. 2E is a schematic diagram of a first public beam provided by an embodiment of the present application. Assuming that the time of failure is T1 and the preset duration is T2, the terminal device obtains the reference signal reception of the public beam 1. The three moments when the power is greater than or equal to the received power of the second preset reference signal are T3, T4, and T5. Since |T3-T1|>|T5-T1|>|T4-T1|, the first moment is T4, and T1-T4<T2, the terminal device determines the common beam 1 as the first common beam.

In some possible implementation manners, the preset condition may also be:

It can be seen that, in this example, the recovered beam is that the received power of the second reference signal in the set of common beams is greater than or equal to the received power of the second preset reference signal, and the terminal device first detects the common beam that competes for free random access channel resources, and then The target with better channel quality corresponding to the restored beam competes for random access channel resources to initiate random access. At this time, the beam failure recovery request is less likely to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the preset condition may also be:

It can be seen that, in this example, the restored beam is that the absolute value of the time when the received power of the second reference signal is greater than or equal to the received power of the third preset reference signal in the common beam set and the time of failure is less than the preset duration, and the terminal device detects the competition earliest Random access to the public beam with free channel resources, and then initiate random access on the target with better channel quality corresponding to the recovery beam to compete for random access channel resources. At this time, the beam failure recovery request is less likely to fail. Help reduce the length of beam failure.

The above is only an exemplary description of the preset conditions and should not be construed as limiting the preset conditions.

203: The terminal device obtains the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource.

For step 203, refer to the description of step B7, which will not be described here.

Optionally, if the target competition random access channel resource corresponding to the recovery beam is currently busy, the terminal device continuously obtains the seventh reference signal received power of each candidate beam in the candidate beam set; if there is a seventh reference in the candidate beam set If the signal receiving power is greater than or equal to the candidate beam of the first preset reference signal receiving power, the terminal device determines the candidate beam having the seventh reference signal receiving power greater than or equal to the first preset reference signal receiving power in the candidate beam set as the restored beam, and then According to the mapping relationship between the candidate beam and the non-contention access channel resource, the target non-contention random access channel resource corresponding to the recovery beam is obtained, and the target non-contention random access channel resource is used through the recovery beam to send a beam failure recovery request to the base station.

204: The terminal device sends a beam failure recovery request to the base station by using the target competition random access channel resource by recovering the beam.

For example, as shown in FIG. 2F, FIG. 2F is a schematic diagram of sending a beam failure recovery request according to an embodiment of the present application. When a terminal device detects that a beam failure occurs, the terminal device compares the failure moment with the first moment (terminal When the device acquires the reference signal receiving power of the public beam 2 greater than or equal to the second preset reference signal receiving power), the public beam 2 whose difference t is less than the preset duration X is determined as the first public beam, and randomly receives the public beam according to the public beam and the competition. The mapping relationship of the incoming channel resources obtains the competing random access channel resource 2 corresponding to the common beam 2, and using the competing random access channel resource 2 through the common beam 2 to send a beam failure recovery request to the base station.

It can be seen that, compared to the terminal device using the contended random access channel resource with poor channel quality to send a beam failure recovery request to the base station by using the recovery beam, in this embodiment of the application, if multiple candidate beams cannot be used as recovery beams, Then select the first common beam that satisfies the beam recovery conditions from the set of common beams, and then initiate random access on the target competition random access channel resource with better channel quality corresponding to the first common beam, and the beam failure recovery request The possibility of transmission failure is small, which helps to reduce the time for beam failure recovery.

In some cases, if the terminal device does not select a suitable common beam from the common beams as the restoration beam, the terminal device will select a suitable candidate beam from the candidate beam set as the restoration beam.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps 301 to 304, which are specifically as follows:

301: The terminal device obtains the reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select candidate beams.

302: When the terminal device detects that a beam failure occurs and the reference signal received power of each candidate beam is less than the first preset reference signal received power, the terminal device determines that the restored beam is a candidate beam that meets the preset condition in the candidate beam set. The recovery beam is used to maintain normal communication between the terminal equipment and the base station.

In some possible implementations, the preset condition may be:

In some possible implementation manners, the preset condition may also be:

303: The terminal device obtains the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

For step 303, refer to the description of step B12, which will not be described here.

304: The terminal device uses the target non-contention random access channel resource to send a beam failure recovery request to the base station through the recovery beam.

It can be seen that, compared to the terminal device using the contended random access channel resource with poor channel quality to send a beam failure recovery request to the base station by using the recovery beam, in this embodiment of the application, if multiple candidate beams do not meet the recovery beam condition , Then select the first candidate beam with the reference signal received power greater than or equal to the second preset reference signal received power from the multiple candidate beams as the restored beam, and then initiate random access on the target non-competitive random access channel resource corresponding to the restored beam Access, the possibility that the beam failure recovery request fails to be sent at this time is small, which helps to reduce the time for beam failure recovery.

Referring to FIG. 4, FIG. 4 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps 401-404, which are specifically as follows:

401: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam.

402: When the terminal device detects that a beam failure occurs, and the first reference signal received power of each candidate beam is less than the preset reference signal received power, the terminal device continuously measures the reference signal received power of the candidate beam set for a preset duration. It is determined that the restored beam is a candidate beam that meets a preset condition in the set of candidate beams within a preset time period, and the restored beam is used to maintain normal communication between the terminal device and the base station.

In some possible implementations, the preset condition may be:

In some possible implementation manners, the preset condition may also be:

403: The terminal device obtains the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

Refer to the description of step B12 for step 403, which will not be described here.

404: The terminal device uses the target non-contention random access channel resource to send a beam failure recovery request to the base station by restoring the beam.

Referring to FIG. 5, FIG. 5 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps 501-504, which are specifically as follows:

501: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam.

502: When the terminal device detects that a beam failure occurs, and the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, the terminal device continues to perform a preset period of time on the candidate beam set and the common beam set. Reference signal received power measurement to determine that the restored beam is a set of candidate beams within the preset duration and a common beam that meets the preset conditions in the set of common beams. The common beam is configured by the base station and used to select the restored beam. The restored beam is used to keep the terminal Normal communication between the device and the base station.

In some possible implementations, the preset condition may be:

In some possible implementation manners, the preset condition may also be:

It can be seen that, in this example, the restored beam means that the third reference signal received power in the common beam set is greater than or equal to the second preset reference signal received power when each candidate doctor in the candidate beam set cannot be used as a restored beam, and The terminal device detects the idle common beam that competes for random access channel resources at the earliest, and then initiates random access on the target competition random access channel resources corresponding to the restored beam, which helps to reduce the time for beam failure recovery.

503: The terminal device obtains the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource.

For step 503, refer to the description of step B7, which will not be described here.

504: The terminal device sends a beam failure recovery request to the base station by using the target competition random access channel resource by recovering the beam.

Referring to FIG. 6, FIG. 6 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps 601-604, which are specifically as follows:

601: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set and the second reference signal received power of each common beam in the common beam set. Both the candidate beam set and the common beam set are base station configurations. And used to select the recovery beam.

602: When the terminal device detects that a beam failure has occurred, and the candidate beam set and the common beam set do not meet the first preset condition, the terminal device determines that the restored beam is a candidate beam that meets the second preset condition in the candidate beam set, and the restored beam Used to maintain normal communication between terminal equipment and base stations.

In some possible implementation manners, the first preset condition may be:

In some possible implementation manners, the second preset condition may be:

603: The terminal device obtains a target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

For step 603, refer to the description of step B12, which will not be described here.

604: The terminal device uses the target non-competitive random access channel resource to send a beam failure recovery request to the base station by restoring the beam.

Referring to FIG. 7A, FIG. 7A is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps 701-704, which are specifically as follows:

701: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set and the second reference signal received power of each common beam in the common beam set. Both the candidate beam set and the common beam set are base station configurations. And used to select the recovery beam.

702: When the terminal device detects that a beam failure occurs, and the candidate beam set and the common beam set do not meet the first preset condition, the terminal device continuously measures the reference signal received power for the first preset duration on the candidate beam set, and determines to recover The beam is a candidate beam that meets the second preset condition in the set of candidate beams within the first preset duration, and the restored beam is used to maintain normal communication between the terminal device and the base station.

In some possible implementation manners, the first preset condition may be:

In some possible implementation manners, the second preset condition may be:

The received power of the third reference signal is greater than or equal to the received power of the first preset reference signal.

The second reference signal received power is greater than or equal to the first preset reference signal power, and the terminal device detects that the non-contention random access channel resource is idle at the earliest.

703: The terminal device obtains the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

For step 703, refer to the description of step B12, which will not be described here.

704: The terminal device uses the target non-contention random access channel resource to send a beam failure recovery request to the base station through the recovery beam.

For example, as shown in FIG. 7B, FIG. 7B is a schematic diagram of sending a beam failure recovery request according to an embodiment of the present application. When a terminal device detects that a beam failure occurs, the reference signal received power of candidate beam 1 and candidate beam The reference signal received power of 2 is less than the received power of the first preset reference signal, and the difference t between the time of failure and the first time in the common beam 1 and the common beam 2 is less than the common beam of the second preset duration X, then the terminal The device continuously detects candidate beam 1, candidate beam 2, common beam 1, and common beam 2 for a first preset duration T1, and sets the first reference signal received power within the first preset duration T1 to be greater than or equal to the first preset reference signal received power Candidate beam 2 is determined to be the recovery beam, and the non-competitive random access channel resource 2 corresponding to candidate beam 2 is obtained according to the mapping relationship between the candidate beam and the non-competitive random access channel resource, and the non-competitive random access channel resource 2 is used through candidate beam 2. 2 Send a beam failure recovery request to the base station.

Referring to FIG. 8, FIG. 8 is a schematic flowchart of another beam failure recovery method provided by an embodiment of the present application. The beam failure recovery request sending method includes steps 801-804, which are specifically as follows:

801: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set and the second reference signal received power of each common beam in the common beam set. Both the candidate beam set and the common beam set are base station configurations. And used to select the recovery beam.

802: When the terminal device detects that a beam failure occurs, and the candidate beam set and the common beam set do not meet the first preset condition, the terminal device continuously performs the reference signal reception power for the candidate beam set and the common beam set for the first preset duration Measure and determine that the restored beam is a candidate beam set within the first preset duration and a common beam satisfying a second preset condition in the common beam set, and the restored beam is used to maintain normal communication between the terminal device and the base station.

In some possible implementation manners, the first preset condition may be:

In some possible implementation manners, the second preset condition may be:

803: The terminal device obtains the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource.

For step 803, refer to the description of step B7, which will not be described here.

804: The terminal device sends a beam failure recovery request to the base station by using the target competition random access channel resource by recovering the beam.

Referring to FIG. 9, FIG. 9 is a schematic flowchart of another beam failure recovery method provided by an embodiment of the present application. The beam failure recovery request sending method includes steps 901-904, which are specifically as follows:

901: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam.

902: When the terminal device detects that a beam failure occurs, and the received power of the first reference signal of each candidate beam is less than the received power of the first preset reference signal, the terminal device continuously performs a preset period of time on the candidate beam set and the common beam set. Reference signal received power measurement to determine that the restored beam is the candidate beam set within the preset duration and the candidate beam that meets the preset conditions in the common beam set. The common beam set is configured by the base station and used to select the restored beam. The restored beam is used to maintain Normal communication between terminal equipment and base station.

In some possible implementations, the preset condition may be:

It can be seen that, in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, and the third reference signal received power of each common beam in the common beam set is less than the third preset reference signal received power, Then, in the candidate beam set, the candidate beam whose second reference signal received power is less than the first preset reference signal received power and greater than or equal to the third preset reference signal received power is used as the restored beam, and then the target non-competitive random beam corresponding to the restored beam Random access is initiated on the access channel resource. At this time, it is less likely that the failed beam recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

In some possible implementation manners, the preset condition may also be:

903: The terminal device obtains the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

For step 903, refer to the description of step B12, which will not be described here.

904: The terminal device uses the target non-contention random access channel resource to send a beam failure recovery request to the base station by restoring the beam.

Referring to FIG. 10, FIG. 10 is a schematic flowchart of another method for sending a beam failure recovery request according to an embodiment of the present application. The method for sending a beam failure recovery request includes steps 1001-1004, which are specifically as follows:

1001: The terminal device obtains the first reference signal received power of each candidate beam in the candidate beam set and the second reference signal received power of each common beam in the common beam set. Both the candidate beam set and the common beam set are base station configurations. And used to select the recovery beam.

1002: When the terminal device detects that a beam failure occurs, and the candidate beam set and the common beam set do not meet the first preset condition, the terminal device continuously performs the reference signal reception power for the candidate beam set and the common beam set for the first preset duration Measure and determine that the restored beam is a candidate beam set within the first preset duration and a candidate beam that meets the second preset condition in the common beam set, and the restored beam is used to maintain normal communication between the terminal device and the base station.

In some possible implementation manners, the first preset condition may be:

In some possible implementation manners, the second preset condition may be:

It can be seen that in this example, if each candidate beam in the candidate beam set cannot be used as a beam recovery condition, and the fourth reference signal received power of each common beam in the common beam set is less than the third preset reference signal received power , Then the candidate beam whose third reference signal received power is less than the first preset reference signal received power and is greater than or equal to the fourth preset reference signal received power in the candidate beam set is used as the restored beam, and the target non-competition corresponding to the restored beam Random access is initiated on the random access channel resource. At this time, it is less likely that the beam failure recovery request fails to be sent, which helps to reduce the time for beam failure recovery.

It can be seen that in this example, if each candidate beam in the candidate beam set cannot be used as a restored beam, and the fourth reference signal received power of each common beam in the common beam set is less than the third preset reference signal received power, Then, the received power of the third reference signal in the candidate beam set is less than the received power of the first preset reference signal and greater than or equal to the received power of the fourth preset reference signal, and the terminal device detects that the second non-competitive random access channel resource is free. The candidate beam is used as a recovery beam, and random access is initiated on the target non-competitive random access channel resource corresponding to the recovery beam. At this time, the beam failure recovery request is less likely to fail to be sent, which helps reduce beam failure recovery The length of time.

1003: The terminal device obtains the target non-competitive random access channel resource corresponding to the restored beam according to the mapping relationship between the candidate beam and the non-competitive random access channel resource.

For step 1003, refer to the description of step B12, which will not be described here.

1004: The terminal device uses the target non-contention random access channel resource to send a beam failure recovery request to the base station by restoring the beam.

Referring to FIG. 11, FIG. 11 is a block diagram of the functional unit composition of a terminal device according to an embodiment of the present application. The terminal device 1100 includes:

The obtaining unit 1101 is configured to obtain the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam;

The determining unit 1102 is configured to determine that the restored beam is a common beam set that satisfies a preset condition when the terminal device detects that a beam failure has occurred and the first reference signal received power of each candidate beam is less than the first preset reference signal received power The public beam set is configured by the base station and used to select the recovery beam, and the recovery beam is used to maintain normal communication between the terminal equipment and the base station;

The determining unit 1102 is further configured to obtain the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

The sending unit 1103 is configured to send a beam failure recovery request to the base station by recovering the beam to use the target competition random access channel resource.

In some possible implementation manners, the obtaining unit 1101 is further configured to obtain the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

The absolute value of the time when the terminal device obtains the second reference signal received power greater than or equal to the third preset reference signal received power and the failure time is less than the preset duration, and the terminal device detects that the competing random access channel resource is idle, and the failure time is the terminal device The moment when a beam failure is detected.

In some possible implementation manners, the device further includes:

The judging unit 1104 is configured to receive multiple detection reference signals using a dual-polarized beam; perform a block error rate statistical operation on the multiple detection reference signals to obtain multiple block error rates, multiple block error rates and multiple detection reference signals. One correspondence; judge whether beam failure occurs according to multiple block error rates.

Referring to Figure 12, Figure 12 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device 1200 includes a processor, a communication interface, and a memory that are coupled to each other. For example, the memory 1210, the communication interface 1220, and the processor 1230 pass through a bus. 1240 coupling.

The memory 1210 may include, but is not limited to, random access memory (RAM), erasable programmable read-only memory (Erasable Programmable ROM, EPROM), read-only memory (Read-Only Memory, ROM), or portable read-only memory A memory (Compact Disc Read-Only Memory, CD-ROM), etc., the memory 1210 is used for related instructions and data.

The processor 1230 may be one or more central processing units (CPUs). When the processor 1230 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 1230 is configured to read the program code stored in the memory 1210, and cooperate with the communication interface 1220 to execute part or all of the steps of the method executed by the terminal device 1200 in the foregoing embodiment of the present application.

The processor 1230 is configured to obtain the first reference signal received power of each candidate beam in the candidate beam set, where the candidate beam set is configured by the base station and used to select the restored beam;

The processor 1230 is further configured to: when the terminal device detects that a beam failure has occurred and the first reference signal received power of each candidate beam is less than the first preset reference signal received power, determine that the restored beam is a common beam set that satisfies the preset Conditional public beams, the public beam set is configured by the base station and used to select the recovery beam, and the recovery beam is used to maintain normal communication between the terminal equipment and the base station;

The processor 1230 is further configured to obtain the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

The communication interface 1220 is configured to send a beam failure recovery request to the base station by using the target random access channel resource by recovering the beam.

In a possible implementation manner, the processor 1230 is further configured to obtain the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

In some possible implementation manners, the processor 1230 is further configured to obtain the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

In a possible implementation manner, the second reference signal received power of each common beam is the average value of at least two third reference signal received powers, and each of the at least two third reference signal received powers The power is measured by the terminal device on the reference signal received power of each common beam.

In a possible implementation manner, the processor 1230 is further configured to use a dual-polarized beam to receive multiple detection reference signals; perform a block error rate statistical operation on the multiple detection reference signals to obtain multiple block error rates and multiple block error rates. The rate corresponds to multiple detection reference signals one-to-one; based on multiple block error rates, it is determined whether beam failure occurs.

The embodiment of the present application provides a computer-readable storage medium that stores a computer program, and the computer program is executed by hardware (such as a processor, etc.) to implement part or all of any method executed by the terminal device in the embodiment of the present application step.

The embodiments of the present application provide a computer program product. When the computer program product runs on the beam failure recovery request sending apparatus, the terminal device is caused to execute part or all of the steps of the beam failure recovery request sending method in the above aspects.

The embodiment of the present application provides a chip system. The chip system includes a processor for supporting a terminal device to implement part or all of the steps of the beam failure recovery request sending method in the above aspects.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of a chip system provided by an embodiment of the present application. The chip system 1300 may include a processor 1301 and one or more interfaces 1302 coupled to the processor 1301. Exemplary:

The processor 1301 may be used to read and execute computer-readable instructions. In specific implementation, the processor 1301 may mainly include a controller, an arithmetic unit, and a register. Exemplarily, the controller is mainly responsible for instruction decoding, and sends control signals for operations corresponding to the instructions. The arithmetic unit is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations and logical operations, etc., and can also perform address operations and conversions. Registers are mainly responsible for storing the register operands and intermediate operation results temporarily stored during instruction execution. In specific implementation, the hardware architecture of the processor 1301 can be an application specific integrated circuit (ASIC) architecture, a microprocessor without interlocked pipeline stage architecture (microprocessor without interlocked stages architecture, MIPS) architecture, and advanced streamlining. Instruction set machine (advanced RISC machines, ARM) architecture or NP architecture, etc. The processor 1301 may be single-core or multi-core.

Exemplarily, the interface 1302 can be used to input data to be processed to the processor 1301, and can output the processing result of the processor 1301 to the outside. In specific implementation, the interface 1302 can be a general purpose input output (GPIO) interface, which can be connected to multiple peripheral devices (such as a display (LCD), a camera (camara), a radio frequency (RF) module, etc.) connection. The interface 1302 is connected to the processor 1301 through the bus 1303.

In a possible implementation, the processor 1301 may be used to call the implementation program or data on the network device or terminal device side of the beam failure recovery request sending method provided by one or more embodiments of the present application from the memory, so that the chip The beam failure recovery request sending method shown in FIGS. 2A to 10 can be implemented. The memory may be integrated with the processor 1301, or may be coupled with the chip system 1300 through the interface 1302, that is to say, the memory may be a part of the chip system 1300, or may be independent of the chip system 1300. The interface 1302 can be used to output the execution result of the processor 1301. In this application, the interface 1302 may be specifically used to output the decoding result of the processor 1301. For the beam failure recovery request sending method provided by one or more embodiments of the present application, reference may be made to the foregoing embodiments, and details are not described herein again.

It should be noted that the respective functions of the processor 1301 and the interface 1302 may be implemented through hardware design, or through software design, or through a combination of software and hardware, which is not limited here.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) to transmit to another website site, computer, server or data center. A computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (such as a floppy disk, a hard disk, and a magnetic tape), an optical medium (such as an optical disk), or a semiconductor medium (such as a solid state hard disk). In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

In the foregoing embodiments, the description of each embodiment has its own emphasis. For a part that is not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device may also be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components can be combined or integrated into another. A system, or some features can be ignored or not implemented. In addition, the displayed or discussed indirect coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or units, and may be in electrical or other forms.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may also be implemented in the form of software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, A number of instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium may include, for example: U disk, mobile hard disk, Read-Only Memory (ROM), Random Access Memory (RAM, Random Access Memory), magnetic disks or optical disks and other storable program codes. Medium.

Claims

A method for sending a beam failure recovery request, which is characterized in that it is applied to a terminal device and includes:

Acquiring the first reference signal received power of each candidate beam in a candidate beam set, where the candidate beam set is configured by the base station and used to select a restoration beam;

When the terminal device detects that a beam failure occurs, and the first reference signal received power of each candidate beam is less than the first preset reference signal received power, it is determined that the restored beam is a common beam that meets the preset conditions in the common beam set. Beams, the set of common beams is configured by the base station and used to select restoration beams, and the restoration beams are used to maintain normal communication between the terminal device and the base station;

Obtaining the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

Sending a beam failure recovery request to the base station by using the target competition random access channel resource through the recovery beam.
The method of claim 1, wherein the method further comprises:

Acquiring the second reference signal received power of each common beam in the set of common beams;

The preset conditions are:

The second reference signal received power is greater than or equal to the second preset reference signal received power.
The method of claim 1, wherein the method further comprises:

Acquiring the second reference signal received power of each common beam in the set of common beams;

The preset conditions are:

The absolute value of the time at which the terminal device obtains the second reference signal received power greater than or equal to the third preset reference signal received power and the failure time is less than the preset duration, and the failure time is when the terminal device detects that a beam failure occurs The moment.
The method of claim 1, wherein the method further comprises:

Acquiring the second reference signal received power of each common beam in the set of common beams;

The preset conditions are:

The received power of the second reference signal is greater than or equal to the received power of the second preset reference signal, and the terminal device detects that the competing random access channel resource is idle at the earliest.
The method of claim 1, wherein the method further comprises:

Acquiring the second reference signal received power of each common beam in the set of common beams;

The preset conditions are:

The absolute value of the time at which the terminal device obtains the second reference signal received power greater than or equal to the third preset reference signal received power and the failure time is less than the preset duration, and the terminal device detects the contention for random access channel resources earliest Idle, the failure moment is the moment when the terminal device detects that a beam failure occurs.
The method according to claim 2 or 4, wherein the received power of the second reference signal of each common beam is an average value of the received power of at least two third reference signals, and the at least two third reference signal Each third reference signal received power in the signal received power is obtained by the terminal device performing reference signal received power measurement on each of the common beams.
The method according to claims 1-6, characterized in that, before the terminal device detects that a beam failure occurs, the method further comprises:

Use dual-polarized beams to receive multiple detection reference signals;

Performing a block error rate statistical operation on the multiple detection reference signals to obtain multiple block error rates, and the multiple block error rates correspond to the multiple detection reference signals one-to-one;

Determine whether beam failure occurs according to the multiple block error rates.
A terminal device, characterized by comprising:

An obtaining unit, configured to obtain the first reference signal received power of each candidate beam in a candidate beam set, where the candidate beam set is configured by the base station and used to select a restoration beam;

The determining unit is configured to determine that the restored beam is in the common beam set when the terminal device detects that a beam failure occurs and the first reference signal received power of each candidate beam is less than the first preset reference signal received power A common beam with a preset condition, the set of common beams is configured by the base station and used to select a restoration beam, and the restoration beam is used to maintain normal communication between the terminal device and the base station;

The determining unit is further configured to obtain the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

The sending unit is configured to send a beam failure recovery request to the base station by using the target contention random access channel resource through the recovery beam.
The terminal device according to claim 8, wherein the obtaining unit is further configured to obtain the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

The second reference signal received power is greater than or equal to the second preset reference signal received power.
The terminal device according to claim 8, wherein the obtaining unit is further configured to obtain the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

The absolute value of the time at which the terminal device obtains the second reference signal received power greater than or equal to the third preset reference signal received power and the failure time is less than the preset duration, and the failure time is when the terminal device detects that a beam failure occurs The moment.
The terminal device according to claim 8, wherein the obtaining unit is further configured to obtain the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

The received power of the second reference signal is greater than or equal to the received power of the second preset reference signal, and the terminal device detects that the competing random access channel resource is idle at the earliest.
The terminal device according to claim 8, wherein the obtaining unit is further configured to obtain the second reference signal received power of each common beam in the common beam set;

The preset conditions are:

The absolute value of the time when the terminal device obtains the received power of the second reference signal greater than or equal to the received power of the third preset reference signal and the fault time is less than the preset duration, and the terminal device detects that the competing random access channel resource is idle , The failure time is the time when the terminal device detects that a beam failure occurs.
The terminal device according to claim 9 or 11, wherein the second reference signal received power of each common beam is an average value of at least two third reference signal received powers, and the at least two third reference signal received powers Each third reference signal received power in the reference signal received power is obtained by the terminal device performing a reference signal received power measurement on each common beam.
The terminal device according to any one of claims 8-13, wherein the device further comprises:

The judging unit is configured to receive multiple detection reference signals using a dual-polarized beam; perform a block error rate statistical operation on the multiple detection reference signals to obtain multiple block error rates, and the multiple block error rates are compared with the multiple The two detection reference signals are in one-to-one correspondence; according to the multiple block error rates, it is determined whether a beam failure occurs.
A terminal device, which includes a processor, a communication interface, and a memory coupled with each other, wherein:

The processor is configured to obtain the first reference signal received power of each candidate beam in a candidate beam set, where the candidate beam set is configured by a base station and used to select a restoration beam;

The processor is further configured to determine that the restored beam is a common beam when the terminal device detects that a beam failure has occurred and the first reference signal received power of each candidate beam is less than the first preset reference signal received power A set of common beams that meet preset conditions, the set of common beams is configured by the base station and used to select restoration beams, and the restoration beams are used to maintain normal communication between the terminal device and the base station;

The processor is further configured to obtain the target competition random access channel resource corresponding to the restored beam according to the mapping relationship between the common beam and the competition random access channel resource;

The communication interface is configured to send a beam failure recovery request to the base station by using the target random access channel resource through the recovery beam.
A computer-readable storage medium, characterized in that a computer program is stored, and the computer program is executed by hardware to implement the method executed by any one of claims 1 to 7 by a terminal device.
A chip system, characterized in that the chip system includes a processor for supporting a terminal device to implement the method according to any one of claims 1 to 7.