CN115398983A

CN115398983A - Beam link recovery method, device and equipment based on random access process

Info

Publication number: CN115398983A
Application number: CN202080099596.9A
Authority: CN
Inventors: 胡奕; 李海涛
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2022-11-25
Also published as: WO2021232434A1

Abstract

The application relates to a beam link recovery method, a beam link recovery device and a beam link recovery device based on a random access process.

Description

Beam link recovery method, device and equipment based on random access process

Technical Field

The present application relates to the field of NTN, and in particular, to a method, an apparatus, and a device for beam link recovery based on a random access procedure.

Background

Currently, 3GPP is researching Non-Terrestrial Network (NTN) technology, and the NTN technology generally provides communication service to a Terrestrial user by using a satellite communication mode.

Compared with the cellular network adopted by the conventional NR, the Round Trip Time (RTT) of the signal between the UE and the satellite in the NTN is greatly increased. Therefore, when the UE triggers the beam failure recovery due to the continuous detection of the beam failure, the time for the UE to complete the beam failure recovery through the random access procedure is correspondingly increased. In order to control the time for the UE to perform the beam failure recovery using the non-contention based random access, the network side may configure a beam failure recovery timer (beamfailure recovery timer) for the UE, and control, by using the beam failure recovery timer, the maximum duration for the UE to use the non-contention based random access in the beam failure recovery process.

In order to support a larger RTT characteristic in the NTN, it is generally necessary to increase a value range of the beamFailureRecoveryTimer in the beam failure recovery process, and the RTT time of the UE in the NTN network also changes greatly, and when the RTT of the UE changes each time, the network reconfigures a value of the beamFailureRecoveryTimer for the UE.

Disclosure of Invention

Based on this, there is a need to provide a method, an apparatus and a device for beam link recovery based on a random access procedure.

In a first aspect, an embodiment of the present invention provides a beam link recovery method based on a random access procedure, where the method includes:

in the beam link recovery process, after the terminal equipment sends a random access RACH message, the terminal equipment starts a target timer and stops running the beam link recovery timer,

and under the condition that the target timer is overtime, the terminal equipment resumes to operate the beam link recovery timer and performs beam failure recovery based on a random access flow.

In a second aspect, an embodiment of the present invention provides a beam link recovery method based on a random access procedure, where the method includes:

in the initialization stage of random access in the beam link recovery process, the terminal equipment starts a beam link recovery timer and performs beam failure recovery based on a random access flow;

before the terminal equipment sends the random access message, the duration of the beam link recovery timer is adjusted based on an adjustment mode; the adjustment mode is the adjustment mode of the beam link recovery timer determined by the terminal equipment according to the round trip time RTT value.

In a third aspect, an embodiment of the present invention provides a beam link recovery apparatus based on a random access procedure, including:

a starting module, which is used for starting the target timer and stopping running the beam link recovery timer after the terminal equipment sends the random access RACH message in the beam link recovery process,

and the recovery module is used for recovering the running of the beam link recovery timer and performing beam failure recovery based on a random access flow under the condition that the target timer is overtime.

In a fourth aspect, an embodiment of the present invention provides a beam link recovery apparatus based on a random access procedure, including: the starting module is used for starting a beam link recovery timer by the terminal equipment at the initialization stage of random access in the beam link recovery process and recovering the beam failure based on the random access process;

the adjusting module is used for adjusting the duration of the beam link recovery timer based on an adjusting mode before sending the random access message; the adjustment mode is the adjustment mode of the beam link recovery timer determined by the terminal equipment according to the round trip time RTT value.

In a fifth aspect, an embodiment of the present invention provides a terminal device, including: a processor, a memory, and a transceiver, the processor, the memory, and the transceiver being in communication with each other through an internal connection path, the memory for storing program code;

the processor is configured to invoke the program code stored in the memory to implement, in cooperation with the transceiver, the steps of the method according to any one of the first aspect.

In a sixth aspect, an embodiment of the present invention provides a terminal device, including: a processor, a memory, and a transceiver, the processor, the memory, and the transceiver being in communication with each other through an internal connection path, the memory for storing program code;

the processor is configured to call the program code stored in the memory to implement the steps of the method according to any one of the second aspect in cooperation with the transceiver.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method of any one of the first aspect.

In an eighth aspect, embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the method of any one of the second aspects.

According to the beam link recovery method, device and equipment based on the random access process, in the beam link recovery process, after the terminal equipment sends the random access message, the terminal equipment starts the target timer and stops running the beam link recovery timer, and under the condition that the target timer is overtime, the terminal equipment recovers running the beam link recovery timer and performs beam failure recovery based on the random access process.

Drawings

Fig. 1 is a schematic view of an application scenario of a beam link recovery method based on a random access procedure according to an embodiment of the present application;

fig. 2 is a flowchart of a beam link recovery method based on a random access procedure according to an embodiment;

fig. 3 is a timing diagram of a beam link recovery method based on a random access procedure according to an embodiment;

fig. 4 is a flowchart of a method for recovering a beam link based on a random access procedure according to an embodiment;

fig. 5 is a timing diagram of a beam link recovery method based on a random access procedure according to an embodiment;

fig. 6 is a timing diagram illustrating a beam link recovery method based on a random access procedure according to an embodiment;

fig. 7 is a block diagram of a beam link recovery apparatus based on a random access procedure according to an embodiment;

fig. 8 is a block diagram of a beam link recovery apparatus based on a random access procedure according to an embodiment;

fig. 9 is a schematic diagram of an internal structure of a terminal device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Before describing the beam link recovery method based on the random access procedure provided in the embodiments of the present application, some related technologies related to the present application will be introduced.

NTN related background

Currently, the third Generation Partnership project (3 rd Generation Partnership project,3 gpp) is studying NTN technology, which generally provides communication services to terrestrial users by way of satellite communication. Satellite communications have many unique advantages over terrestrial cellular communications. First, satellite communication is not limited by user regions, for example, general terrestrial communication cannot cover regions where communication equipment cannot be set up, such as oceans, mountains, deserts, and the like, or where communication coverage is not performed due to sparse population, and for satellite communication, since one satellite can cover a large ground and the satellite can orbit around the earth, theoretically every corner on the earth can be covered by satellite communication. Second, satellite communication has great social value, for example, satellite communication can cover in remote mountain areas, poor countries or areas with low cost, so that people in these areas enjoy advanced voice communication and mobile internet technology, which is beneficial to narrow down the digital gap of developed areas and promote the development of these areas. Thirdly, the satellite communication distance is far, and the communication cost is not obviously increased along with the increase of the communication distance; and finally, the satellite communication has high stability and is not limited by natural disasters.

Communication satellites are classified into Low-Earth Orbit (LEO) satellites, medium-Earth Orbit (MEO) satellites, geosynchronous Orbit (GEO) satellites, high-elliptic Orbit (HEO) satellites, and the like according to the difference in orbital altitude. The main studies at the present stage are LEO and GEO.

1、LEO

The height range of the low-orbit satellite is 500 km-1500 km, and the corresponding orbit period is about 1.5 hours-2 hours. The signal propagation delay for inter-user single-hop communications is typically less than 20ms. Maximum satellite visibility time 20 minutes. The signal propagation distance is short, the link loss is less, and the requirement on the transmitting power of the user terminal is not high.

2、GEO

A geosynchronous orbit satellite, with an orbital altitude of 35786km, has a period of 24 hours of rotation around the earth. The signal propagation delay for inter-user single-hop communications is typically 250ms.

In order to ensure the coverage of the satellite and improve the system capacity of the whole satellite communication system, the satellite adopts multiple beams to cover the ground, and one satellite can form dozens of or even hundreds of beams to cover the ground; one satellite beam may cover a ground area several tens to hundreds of kilometers in diameter.

Beam failure detection and beam failure recovery

The UE may perform beam failure detection and beam failure recovery procedures based on the network configuration. The beam failure detection is that the UE detects a beam failure on a Synchronization Signal and a PBCH block (SSB)/Channel State Information (CSI) -Reference Signal (RS) currently being served. The beam failure recovery is used for the UE to indicate a new SSB/CSI-RS to the serving cell.

The Media Access Control (MAC) layer detects beam failures by continuously counting beam failure instance indications from the physical layer. The network configures an SSB/CSI-RS Resource for beam failure detection to the UE through Radio Resource Control (RRC) signaling, and configures a maximum number of beam failure instances (beamfailure identity max count) and a timer (beamfailure detection timer) for beam failure detection. The MAC layer maintains a COUNTER BFI _ COUNTER for beam failure detection, the initial value of which is 0.

If the MAC layer receives the beam failure example indication from the physical layer, starting or restarting a beamFailureDetectionTimer; accumulating a COUNTER BFI _ COUNTER by 1; if BFI _ COUNTER is greater than or equal to beamFailureInstanceinMaxCount, UE initiates a random access procedure at SpCell.

If the beamFailureDetectionTimer times out or the UE receives a reconfiguration for any one of the several parameters, e.g., the SSB/CSI-RS resource, beamfailurelnstanceinmaxcount, and beamFailureDetectionTimer, for beam failure detection, the COUNTER BFI _ COUNTER is reset to 0.

If the random access is successful, resetting a COUNTER BFI _ COUNTER to 0; stopping the beamFailureRecoveryTimer; the beam failure recovery procedure is considered to be successfully completed.

Random access procedure triggered by beam failure recovery

To support the beam failure recovery procedure, the network configures the UE with the following parameters through RRC signaling:

a non-contention based Random Access Channel (RACH) resource RACH-ConfigBFR for beam failure recovery;

candidate beams for Beam Failure Recovery (BFR) and their corresponding RACH parameter list candidaberraslst;

an L1-RSRP threshold RSRP-ThresholdSSB for beam selection by the UE;

the beam failure recovery timer is used for controlling the UE to use the beam failure recovery timer based on the maximum duration of the non-competitive random access in the BFR process.

If the purpose of the UE to initiate random access is for beam failure recovery: in the random access initialization phase, if the network configures the beamFailureRecoveryConfig for the UE on the active UL BWP of the currently selected uplink carrier, the UE starts the beamFailureRecoveryTimer.

When the UE selects the RACH resource, if a timer beamFailureRecoveryTimer is running or the network is not configured with beamFailureRecoveryTimer, and the network is configured with non-contention-based RACH resources for BFR, and at least one Synchronization Signal (SS) -Reference Signal Receiving Power (RSRP) corresponding to the SSB exists in the candidate beams configured for BFR by the network, and is higher than a RSRP-threshold SSB threshold configured by the network, or at least one CSI-RS corresponding CSI-RSRP is higher than a RSRP-threshold-dCSI-RS threshold configured by the network, the UE selects one SSB from the candidate SSBs for which the corresponding SS-RSRP is higher than the RSRP-threshold SSB threshold, or selects one CSI-RS from the candidate SSBs for which the corresponding CSI-RS is higher than the RSRP-threshold-RSRP; otherwise, contention-based random access is used. If at least one SSB with the corresponding SS-RSRP higher than the RSRP-threshold SSB configured by the network exists in the candidate beams of the BFR, selecting one SSB with the corresponding SS-RSRP higher than the RSRP-threshold SSB from the candidate beams; otherwise, one SSB is arbitrarily selected.

In the random access process, the UE needs to wait at least 1 RTT from sending Msg1 to receiving Msg2 from the network. Similarly, the UE also needs to wait at least 1 RTT from sending Msg3 to receiving Msg4 from the network. In a New Radio (NR) ground network, the delay of signal transmission between the UE and the network is small, and the waiting time from the time when the UE sends uplink transmission to the time when the UE receives a network response is generally short, so that the time required by the UE to complete random access is generally short, and the beamFailureRecoveryTimer may be set to a small value.

Compared with the cellular network adopted by the traditional NR, the signal propagation delay between the UE and the satellite in the NTN is greatly increased. In a GEO scene, the RTT can reach 541.46ms at the longest. Therefore, when the UE triggers the beam failure recovery due to the continuous detection of the beam failure, the time for the UE to complete the beam failure recovery through the random access procedure also increases in response. The network may configure a non-contention-based RACH resource for the beam failure recovery for the UE, and in order to control the time for the UE to perform the beam failure recovery using the non-contention-based random access, the network may control the maximum duration for the UE to use the non-contention random access in the beam failure recovery process by configuring the timer beamFailureRecoveryTimer. To support the larger RTT characteristic in NTN, one idea is to increase the value range of beamFailureRecoveryTimer. However, RTT time of the UE in the NTN network also changes greatly (especially in an LEO scenario), which may cause frequent reconfiguration of the beamFailureRecoveryTimer by the network, resulting in large signaling overhead.

Therefore, the embodiment of the present application provides a beam link recovery method based on a random access procedure, which is used to solve the technical problems of high signaling overhead caused by frequent reconfiguration of the value of the beamf ailurerecoverytimer of the network due to large RTT time change of the UE in the NTN network, and large delay in the effective time of a new parameter value caused by excessively long RTT. It should be noted that, the present application provides a method for recovering a beam link based on a random access procedure, which is not limited to solve the above technical problems, but also can solve other technical problems, for example, the present application provides a method for recovering a beam link based on a random access procedure, which can also solve the technical problem of "the effective time of a new parameter value is also delayed greatly due to an excessively long RTT", and the present application is not limited thereto in the embodiments.

The beam link recovery method based on the random access procedure provided in the embodiment of the present application may be applied to the NTN technology, and fig. 1 is an application scenario diagram of the beam link recovery method based on the random access procedure provided in the embodiment of the present application. As shown in fig. 1, the scenario includes a network device 1, a UE2, a UE3, and a UE4, where the network device 1 communicates with the UE2, the UE3, and the UE4 through a network. Wherein, the network device 1 may be but not limited to a base station, a LEO satellite, a MEO satellite, a GEO satellite, a HEO satellite, etc., and the UE may be but not limited to various personal computers, laptops, smartphones, tablets, portable wearable devices, etc. It should be noted that, the present application may also include a greater number of network devices and UEs, and is not limited to fig. 1.

Fig. 2 is a flowchart of a beam link recovery method based on a random access procedure according to an embodiment, where the method refers to a specific implementation manner of performing beam link recovery by using a set target timer and a beam link recovery timer configured by a network device. As shown in fig. 2, the method comprises the steps of:

s201, in the wave beam link recovery process, after the terminal equipment sends the random access message, the terminal equipment starts a target timer and stops running the wave beam link recovery timer.

The beam link recovery timer is a timer configured by the network device for the terminal device. The duration of the target timer may be a duration determined by the UE or a duration configured by the network device, and the target timer is used to characterize a round trip transmission time RTT of signal transmission between the UE and the network device during the operation period of the beam failure recovery timer. The terminal device or the network device may set the target timer based on RTT of signal transmission between the UE and the network device during operation of the beam failure recovery timer, so that the preset timer can adapt to RTT variation of round trip time of signal transmission between the UE and the network device.

In this embodiment, in the beam link recovery process, after the terminal device sends the machine access message, if the beam link recovery timer beamFailureRecoveryTimer is running, the UE starts the target timer, and at the same time, stops running the beamFailureRecoveryTimer. The UE may start the target timer and suspend the beamf ailurerecoverytimer after sending the Msg1, or start the target timer and suspend the beamf ailurerecoverytimer after sending the Msg3, or both start the target timer and suspend the beamf ailurerecoverytimer after sending the Msg1 and Msg3, and the embodiments of the present application are not limited thereto.

S202, under the condition that the target timer is overtime, the terminal equipment recovers to run the beam link recovery timer and performs beam failure recovery based on the random access flow.

In this embodiment, when the target timer is overtime, the terminal device resumes running the beamfailure recovery timer, and performs beam failure recovery based on the random access procedure. For example, when the terminal device sends the machine access message, the beamFailureRecoveryTimer runs to the 6 th S, the terminal device starts the target timer, and suspends the beamFailureRecoveryTimer, and then when the target timer is overtime, the terminal device controls the beamFailureRecoveryTimer to run from the 6 th S.

According to the beam link recovery method based on the random access process, in the beam link recovery process, after the terminal equipment sends the random access message, the terminal equipment starts the target timer and stops running the beam link recovery timer, and under the condition that the target timer is overtime, the terminal equipment recovers to run the beam link recovery timer and carries out beam failure recovery based on the random access process.

On the basis of the embodiment shown in fig. 2, the method for recovering a beam link based on a random access procedure may further include: and under the condition that the beam link recovery timer is overtime, the terminal equipment only carries out beam failure recovery based on a competitive random access flow.

In this embodiment, if the beam failure recovery timer is overtime, the contention-based random access procedure performs beam failure recovery. That is, if the sum of the durations of the target timer and the beam failure recovery timer cannot meet the RRT of the signal transmission from the terminal to the network device at present, the beam failure recovery can be performed based on the contention based random access process, and the beam failure recovery can be successfully achieved.

In the embodiment shown in fig. 2, different target timers may also be set for different random access messages. In one embodiment, in the case that the RACH message is Msg1, the terminal device starts a first timer and stops running a beam link recovery timer;

wherein the first timer comprises one of: the terminal equipment starts a timer of random access response offset RAR offset at the initial time of a random access response window; a configured timer.

In this embodiment, the target timer is a first timer, and the first timer may be a timer that the terminal device starts a Random Access Response offset (RAR offset) at a start time of a Random Access Response window, or may be a preconfigured timer.

In the beam link recovery process, after the terminal device sends Msg1, if the beamFailureRecoveryTimer is detected to be running, the first timer is started, and the beamFailureRecoveryTimer is paused, and under the condition that the first timer is overtime, the beamFailureRecoveryTimer is resumed to run, so that the duration of the beamFailureRecoveryTimer is prolonged equivalently, and the characteristic that the RRT of signal transmission from the UE to the communication satellite is large in the NTN communication process is adapted.

Optionally, the configured timer is determined by one of the following:

the terminal equipment configures a first timer according to the RTT value between the terminal equipment and the network equipment;

the terminal equipment configures a first timer according to the TA value in time advance;

the terminal equipment determines a first timer according to the RTT value between the terminal equipment and the network equipment;

the terminal device determines a first timer according to an RTT value between the terminal device and the network device, where the RTT value is sent by a Radio Resource Control (RRC) signaling through the network device.

Further, the RTT value with the network device includes:

RTT value between terminal equipment and base station equipment or satellite;

RTT values between the ground reference point and the base station device, or the satellite.

In this embodiment, the obtaining manner and the value of the first timer may be an RTT value between the terminal device and the base station device/satellite, which is calculated by the terminal device. Or, the obtaining mode and the value of the first timer may be an RTT value calculated by the terminal device from the ground reference point to the base station device/satellite. Or, the obtaining manner and the value of the first timer may be a timer configured by the terminal device according to the currently used TA value. Or, a fixed value broadcasted by the network, for example, an RTT value between the terminal device and the network device, the terminal device configures the first timer according to the RTT value between the terminal device and the network device broadcasted by the network device, where the RTT value between the terminal device and the network device may be an RTT value between the terminal device and the base station device or between the terminal device and the satellite, or may be an RTT value between a ground reference point and the base station device or between the ground reference point and the satellite. Or the network device configures an RTT value between the terminal device and the network device based on the RRC signaling, where the RRC information includes a dedicated RRC signaling, the terminal device may configure a first timer according to the RTT value between the terminal device and the network device configured by the network device based on the RRC signaling, and the RTT value between the terminal device and the network device may be an RTT value between the terminal device and the base station device or a RTT value between the terminal device and the satellite, or an RTT value between a ground reference point and the base station device or an RTT value between the ground reference point and the satellite. The UE can flexibly set the first timer according to actual requirements and scenes so as to improve the applicability of the scenes.

In another embodiment, in case that the RACH message is Msg3 or Msg a, the terminal device starts the second timer and stops running the beam link recovery timer;

wherein the second timer comprises one of: a first timer; the terminal device starts a timer of contention resolution offset at the starting time of the random access contention resolution timer.

In the present embodiment, the target timer is the second timer, that is, the second timer may be set for Msg3 or Msg a. The second timer may be the first timer, that is, after the terminal device sends Msg3 or Msg a, if it is detected that the beamFailureRecoveryTimer is running, the first timer may also be started, and the beamFailureRecoveryTimer is suspended. In some scenarios, the second timer may also be a timer that starts a contention resolution offset at a starting time of the random access contention resolution timer, which is not limited in the embodiment of the present application.

In the beam link recovery process, after the terminal device sends Msg3 or Msg a, if it is detected that the beamf ailurerecoverytimer is running, the second timer is started, and the beamf ailurerecoverytimer is suspended, and under the condition that the second timer is overtime, the beamf ailurerecoverytimer is resumed to run, so that the duration of the beamf ailurerecoverytimer is prolonged, which is equivalent to the characteristic that the RRT of the signal transmission from the UE to the communication satellite is large in the NTN communication process.

Fig. 3 is a timing diagram of a beam link recovery method based on a random access procedure according to an embodiment. In this embodiment, a first timer is taken as an example where the terminal device starts a RAR offset timer at the start time of the random access response window, and a second timer is taken as an example where the terminal device starts a contention resolution offset timer at the start time of the random access contention resolution timer. As shown in fig. 3, when a beam failure indication COUNTER BFI _ COUNTER maintained by a MAC entity of a terminal device reaches beamfailurelnstanceinmaxcount, the terminal device initiates a random access process; in the random access initialization process, if the random access is for beam failure recovery and the network configures BeamFailureRecoveryConfig on the currently activated UL BWP of the uplink carrier selected by the terminal device, the UE starts beamFailureRecoveryTimer; after UE sends Msg1, if the beamFailureRecoveryTimer is running, the terminal equipment starts the terminal equipment to start a timer of RAR offset at the starting time of the random access response window, the beamFailureRecoveryTimer is suspended, when the timer of RAR offset is overtime, the response receiving window of random access is started, and the operation of the beamFailureRecoveryTimer is resumed. When the response receiving window of random access is overtime, after the UE sends Msg1 again, the UE starts a timer of RAR offset and pauses the beamFailureRecoveryTimer. When the timer of the RAR offset is overtime, starting a response receiving window of random access and simultaneously resuming to run the beamFailureRecoveryTimer, when the UE receives the Msg2, stopping the response receiving window of random access, after sending the Msg3, starting the terminal device to start a timer of a contention resolution offset (contentresolution offset) at the starting time of a random access contention resolution timer (ra-contentresolution timer) and simultaneously pausing the beamFailureRecoveryTimer. When the timer of contentresourcesolventiff times out, ra-contentresourcereversitiontimer is started, and the operation of the beamFailureRecoveryTimer is resumed until Mag4 is received, and ra-contentresourcetiontimtimer is stopped.

Fig. 4 is a flowchart of a beam link recovery method based on a random access procedure, which relates to a specific implementation manner in which, in a beam link recovery process, a terminal device determines an adjustment manner of a beam link recovery timer according to an RTT value, and adjusts a duration of the beam link recovery timer based on the adjustment manner. As shown in fig. 4, the method comprises the steps of:

s401, in the initialization stage of random access in the beam link recovery process, the terminal equipment starts a beam link recovery timer and performs beam failure recovery based on a random access flow.

The beam link recovery timer may be a beam link recovery timer configured by the network device, or may be a timer obtained by adjusting the duration of the beam link recovery timer based on an adjustment mode before the random access message is sent last time.

In this embodiment, when a beam failure indication COUNTER BFI _ COUNTER maintained by an MAC entity of a terminal device reaches beamfailurelnstancemexcount, the UE initiates a random access process; in the random access initialization process, if the random access is for beam failure recovery and the network configures BeamFailureRecoveryConfig on the currently activated UL BWP of the uplink carrier selected by the UE, the UE starts a beam link recovery timer.

S402, before the terminal equipment sends the random access message, the duration of the beam link recovery timer is adjusted based on an adjusting mode; the adjustment mode is that the terminal equipment determines the adjustment mode of the beam link recovery timer according to the RTT value.

In this embodiment, before sending the random access message each time, the terminal device may adjust the duration of the beam link recovery timer based on the adjustment mode, so as to adapt to the RTT from the terminal device to the network device. The adjustment mode is an adjustment mode of a beam link recovery timer determined by the terminal device according to an RTT value between the terminal device and the network device, and the terminal device may be an adjustment mode of a beam link recovery timer determined according to an actual RTT value between the terminal device and the network device, or an adjustment mode of a beam link recovery timer determined jointly according to an actual RTT value between the terminal device and the network device and a reference RTT value between the terminal device and the network device configured by the network device. The terminal device may determine the adjustment mode in an initialization stage of the random access, or may determine the adjustment mode before sending the random access message each time, which is not limited in the embodiment of the present application.

According to the beam link recovery method based on the random access process, in the initialization stage of random access in the beam link recovery process, the terminal device starts the beam link recovery timer, before the terminal device sends the random access message, the duration of the beam link recovery timer is adjusted based on the adjustment mode, the adjustment mode is that the terminal device determines the adjustment mode of the beam link recovery timer according to the RTT value, the RTT of signal transmission from the terminal device to the network device at present can be adapted, moreover, the network device does not need to frequently configure the beam failure recovery timer, and signaling overhead is reduced.

On the basis of the embodiment shown in fig. 4, there may be multiple ways to determine the adjustment manner, and in an embodiment, the determining, by the terminal device, the adjustment manner of the beam link recovery timer according to the round trip transmission time RTT value includes:

the terminal equipment determines a first adjustment factor according to the RTT value between the terminal equipment and the network equipment and the RTT value configured by the network equipment;

and the terminal equipment determines a second adjustment factor according to a Timing Advance (TA) value corresponding to the terminal equipment and the RTT value configured by the network equipment.

Wherein the first adjustment factor and the second adjustment factor can be used to adjust the duration of the beam link recovery timer. Optionally, the first adjustment factor is a ratio of an RTT value between the terminal device and the network device to an RTT value configured by the network device, and the second adjustment factor is a ratio of a TA value corresponding to the terminal device to an RTT value configured by the network device. The RTT value configured by the network device is configured by the network device based on a broadcast message or RRC signaling.

Optionally, the round trip time RTT value with the network device includes:

RTT value between terminal equipment and base station equipment or satellite;

RTT values between a ground reference point and a base station device, or a satellite.

In this embodiment, the round trip time RTT value between the terminal device and the network device may be an RTT value between the terminal device and the base station device or between the terminal device and the satellite, which is obtained by calculation by the terminal; or the RTT value between the ground reference point and the base station device or the satellite calculated by the terminal.

In this embodiment, the terminal device may determine a first adjustment factor according to an RTT value with the network device and an RTT value configured by the network device, and adjust a duration of the beam link recovery timer according to the first adjustment factor; or, the terminal device may also determine a second adjustment factor according to the TA value corresponding to the terminal device and the RTT value configured by the network device, and adjust the duration of the beam link recovery timer according to the second adjustment factor.

Further, the terminal device adjusts the duration of the beam link recovery timer based on the adjustment mode, including:

and the terminal equipment determines the time length of the adjusted beam link recovery timer according to the first adjustment factor or the product of the first adjustment factor and the time length of the beam link recovery timer.

In this embodiment, the terminal device determines the duration of the adjusted beam link recovery timer according to the product of the first adjustment factor and the duration of the beam link recovery timer, or the terminal device determines the duration of the adjusted beam link recovery timer according to the product of the second adjustment factor and the duration of the beam link recovery timer.

For example, the terminal device determines a first adjustment factor scale factor1 according to the calculated RTT of signal transmission between the terminal device and the network, and the RTT configured by the network device, where scale factor1= RTT value with the network device/RTT configured by the network device; the UE adjusts the duration of the beamFailureRecoveryTimer to be: the product of the beamFailureRecoveryTimer duration of the network configuration and scale factor 1.

For another example, the terminal device determines the second adjustment factor scale factor2 according to the value of the TA currently used by the terminal device and the RTT configured by the network device, for example: scale factor2= TA value/network device configured RTT; the UE adjusts the duration of the beamFailureRecoveryTimer to be: the product of the beamFailureRecoveryTimer duration of the network configuration and scale factor 2.

In the method for recovering a beam link based on a random access procedure provided in this embodiment, a terminal device determines a first adjustment factor according to an RTT value between the terminal device and a network device and an RTT value configured by the network device, or the terminal device determines a second adjustment factor according to a TA value corresponding to the terminal device and an RTT value configured by the network device, and determines a duration of an adjusted beam link recovery timer according to a product of the first adjustment factor or the first adjustment factor and a duration of the beam link recovery timer.

In the above beam failure recovery process, the type of the random access procedure also needs to be determined. In one embodiment, in an initialization phase of random access in a beam link recovery process, a terminal device starts a beam link recovery timer and performs beam failure recovery based on a random access procedure, including:

the terminal device determines the type of the random access process based on the resource type of the random access resource and the comparison result of the reference signal received power of the terminal device on at least one candidate beam for the beam failure recovery and the reference signal received power threshold.

In this embodiment, the network device configures, in advance, relevant parameters for beam failure recovery for the terminal device. For example, the UE in the connected state receives an RRC reconfiguration message sent by the gNB, and obtains radio linkmonitoring config and BeamFailureRecoveryConfig configurations, which include:

RadioLinkMonitoringConfig configuration: at least comprises SSB/CSI-RS resource configuration failureDetectionResources used for beam failure detection, beam failure example maximum times beamFailureInstanceinMaxCount, and beam failure monitoring timer beamFailureDetectionTimer.

BeamFailureRecoveryConfig configuration: the method at least comprises a non-contention based RACH resource configuration RACH-ConfigBFR used for BFR, a candidate beam used for BFR and a RACH parameter list candidateBeamRSList corresponding to the candidate beam, an L1-RSRP-threshold SSB used for beam selection of UE in the BFR process, and a beamfailure recovery timer beamFailureRecoveryTimer used for controlling the UE to use the maximum duration based on non-contention random access in the BFR process.

Therefore, in the beam reply process, the terminal device may determine the type of the performed random access procedure based on the resource type configured in the parameter information configured by the network device and a comparison result between the reference signal received power on the at least one candidate beam for beam failure recovery and the reference signal received power threshold.

Further, the determining, by the terminal device, the type of the random access procedure performed based on the resource type of the random access resource and a comparison result between the reference signal received power of the terminal device on at least one candidate beam for beam failure recovery and a reference signal received power threshold includes:

under the conditions that the terminal equipment acquires random access resources based on non-competition and the reference signal receiving power of the terminal equipment on at least one candidate beam is not less than the reference signal receiving power threshold, the terminal equipment performs random access based on non-competition;

and under the conditions that the terminal equipment acquires the random access resource based on non-competition and the reference signal receiving power of the terminal equipment on at least one candidate beam is smaller than the reference signal receiving power threshold, the terminal equipment performs random access based on competition.

In this embodiment, if the network device configures a non-contention based random access resource for the UE and the RSRP of the terminal device on at least one candidate beam for BFR is higher than or equal to the RSRP threshold configured by the network, the UE uses the non-contention based random access; and if the network equipment does not configure non-contention-based random access resources for the terminal equipment, or the RSRP of the terminal equipment on all candidate beams for BFR is less than the RSRP threshold configured by the network, using contention-based random access.

According to the beam link recovery method based on the random access process, the terminal device determines the type of the random access process based on the resource type of the random access resource and the comparison result of the reference signal receiving power of the terminal device on at least one candidate beam for beam failure recovery and the reference signal receiving power threshold, and selects the appropriate type of the random access process according to the resource types of different random access resources and the reference signal receiving power of the candidate beam for beam failure recovery, so that the method can adapt to various scenes, and the universality of the beam link recovery method based on the random access process is improved.

Fig. 5 is a timing diagram of a beam link recovery method based on a random access procedure according to an embodiment. As shown in fig. 5, when a beam failure indication COUNTER BFI _ COUNTER maintained by a MAC entity of the terminal device reaches beamfailurelnstanceinmaxcount, the terminal device initiates a random access process; the terminal device determines a scaling factor scale factor according to the calculated RTT of signal transmission between the UE and the network or the currently used TA value, in combination with the reference RTT configured by the network, for example: scale factor = UE TA/reference RTT. In the random access initialization process, if the random access is for beam failure recovery, and the network configures BeamFailureRecoveryConfig on the currently activated UL BWP of the uplink carrier selected by the UE, the UE starts BeamFailureRecoveryConfig, and before sending a random access message each time, adjusts the beamFailureRecoveryTimer duration to: the product of the beamFailureRecoveryTimer duration of the network configuration and the scaling factor. The operation mechanism of RAR offset and contentresolution offset is similar to that of the embodiment shown in fig. 3, and is not described here again.

Another specific implementation of determining the adjustment of the beam link recovery timer is described below with another embodiment. The terminal equipment determines the adjustment mode of the beam link recovery timer according to the round trip transmission time RTT value, and the adjustment mode comprises the following steps:

the terminal equipment determines a first adjustment increment according to the round trip time RTT value between the terminal equipment and the network equipment and the RTT value configured by the network equipment;

and the terminal equipment determines a second adjustment increment according to the TA value corresponding to the terminal equipment and the RTT value configured by the network equipment.

Wherein the first adjustment increment and the second adjustment increment can be used to adjust a duration of the beam link recovery timer. Optionally, the first adjustment increment is a difference between an RTT value between the terminal device and the network device and an RTT value configured by the network device, and the second adjustment increment is a difference between a TA value corresponding to the terminal device and an RTT value configured by the network device. The RTT value configured by the network device is configured by the network device based on a broadcast message or RRC signaling.

In this embodiment, the terminal device may determine a first adjustment increment according to an RTT value with the network device and an RTT value configured by the network device, and adjust a duration of the beam link recovery timer according to the first adjustment increment; or, the terminal device may also determine a second adjustment increment according to the TA value corresponding to the terminal device and the RTT value configured by the network device, and adjust the duration of the beam link recovery timer according to the second adjustment increment.

and the terminal determines the time length of the adjusted beam link recovery timer according to the sum of the first adjustment increment or the second adjustment increment and the time length of the beam link recovery timer.

In this embodiment, the terminal device determines the duration of the adjusted beam link recovery timer according to the sum of the first adjustment increment and the duration of the beam link recovery timer, or the terminal device determines the duration of the adjusted beam link recovery timer according to the sum of the second adjustment increment and the duration of the beam link recovery timer.

For example, the terminal device determines, according to the calculated RTT of signal transmission between the terminal device and the network and the RTT configured by the network, that the adjustment increment delta1= of the beamFailureRecoveryTimer duration and the RTT of signal transmission between the network — the RTT configured by the network. Before sending the random access message, the time length of the beamFailureRecoveryTimer is adjusted to be beamFailureRecoveryTimer + delta1.

For another example, the terminal device determines, according to the currently used TA value and the RTT configured by the network, the adjustment increment delta2= TA value — RTT configured by the network, of the beamFailureRecoveryTimer duration. Before sending the random access message, the duration of the beamFailureRecoveryTimer is adjusted to beamFailureRecoveryTimer + delta2.

In the method for recovering a beam link based on a random access procedure provided in this embodiment, a terminal device determines a first adjustment increment according to an RTT value between the terminal device and a network device and an RTT value configured by the network device, or the terminal device determines a second adjustment increment according to a TA value corresponding to the terminal device and an RTT value configured by the network device, and determines a duration of an adjusted beam link recovery timer according to a product of the first adjustment increment or the first adjustment increment and a duration of the beam link recovery timer.

Optionally, the terminal device determines a first adjustment increment or a second adjustment increment during random access initialization; or, the terminal device determines the first adjustment increment or the second adjustment increment before sending the random access message each time.

In this embodiment, the terminal device may calculate the adjustment delta of the beamFailureRecoveryTimer duration (that is, only once) at the current random access initialization stage, and in the random access process, the UE adjusts the used beamFailureRecoveryTimer duration based on the adjustment delta of the beamFailureRecoveryTimer duration before sending the Msg1 and sending the Msg3 each time. In the current random access process, the adjustment increment is calculated once in the initialization stage, so that the calculation amount is reduced.

Or, considering that the RTT of communication between the terminal device and the network changes rapidly in the LEO scenario, the terminal device may also calculate an adjustment delta of the beamFailureRecoveryTimer duration based on a comparison between the current RTT of the terminal device and a reference RTT configured in the network (that is, the UE calculates once before each uplink transmission) before each Msg1 and Msg3 transmission in the random access process, and adjust the beamFailureRecoveryTimer duration based on the adjustment delta of the beamFailureRecoveryTimer duration. Because the terminal device calculates the adjustment increment once before each uplink transmission, the target timer obtained according to the adjustment increment is more consistent with the RTT of the communication between the terminal device and the network.

Fig. 6 is a timing diagram illustrating a beam link recovery method based on a random access procedure according to an embodiment. As shown in fig. 6, when a beam failure indication COUNTER BFI _ COUNTER maintained by the MAC entity of the terminal device reaches beamfailurelnstanceinmaxcount, the terminal device initiates a random access process; the UE determines the adjustment increment delta of the beamfailureRecoveryTimer duration: and the UE determines the adjustment increment delta of the beam FailureRecoveryTimer duration = UE TA-reference RTT by combining the reference RTT configured by the network according to the calculated RTT of the signal transmission between the UE and the network or the current used TA value of the UE. In this implementation, the UE calculates the adjustment increment delta of the beamFailureRecoveryTimer duration (i.e., only once) at the current random access initialization stage, and in the random access process, the UE adjusts the used beamFailureRecoveryTimer duration based on the adjustment increment delta of the beamFailureRecoveryTimer duration before sending the Msg1 and sending the Msg3 each time. The difference between this embodiment and the embodiment shown in fig. 5 is that before sending an uplink message each time, the used beamFailureRecoveryTimer duration needs to be adjusted according to the delta, and the operation mechanisms of other RAR offsets and ContentionResolution offsets are similar to the embodiment shown in fig. 3, and are not described here again.

On the basis of the embodiment shown in fig. 4, in the beam link recovery method based on the random access procedure, in the random access initialization process, and in the case that the terminal device acquires the beam failure recovery configuration information configured by the network device for the terminal device on the currently activated UL BWP of the selected uplink carrier, the terminal device starts a beam link recovery timer.

In this embodiment, during the random access initialization procedure, and in a case that the terminal device obtains the beam failure recovery configuration information configured by the network device for the terminal device on the currently activated UL BWP of the selected uplink carrier, the terminal device starts a beam link recovery timer, which may be a beam link recovery timer configured by the network device, and then adjusts the duration of the beam link recovery timer according to the adjustment factor or the adjustment increment before sending the random access information each time. Or, in the initialization stage, the duration of the beam link recovery timer may be adjusted according to the adjustment factor or the adjustment increment, the beam link recovery timer after the duration is adjusted is directly started, and before sending the random access message each time, the adjustment factor or the adjustment increment may be continuously updated, and the duration of the beam link recovery timer may be adjusted again based on the updated adjustment factor or the adjustment increment.

On the basis of the embodiment shown in fig. 4, in the case that the beam link recovery timer is expired, the terminal device performs beam failure recovery only based on the contention random access procedure.

In this embodiment, when the duration of the beam link recovery timer is adjusted according to the adjustment factor or the adjustment increment and the beam link recovery timer is still overtime, the terminal device may perform beam failure recovery based on a contention random access procedure, so as to ensure that the reliability of beam failure recovery can be ensured in various scenarios.

In one embodiment, as shown in fig. 7, there is provided a beam link recovery apparatus based on a random access procedure, including:

a starting module 11, configured to start a target timer and stop running a beam link recovery timer after the terminal device sends a random access RACH message in a beam link recovery process,

a recovery module 12, configured to, when the target timer is overtime, recover to run the beam link recovery timer and perform beam failure recovery based on a random access procedure.

In an embodiment, in case that the RACH message is Msg1, a starting module 11 is configured to start a first timer and stop running the beam link recovery timer;

In one embodiment, the configured timer is determined by one of:

the terminal equipment configures the first timer according to the Round Trip Time (RTT) value between the terminal equipment and network equipment;

the terminal equipment configures the first timer according to a TA value in time advance;

the terminal equipment determines the first timer according to the RTT value between the terminal equipment and the network equipment;

and the terminal equipment determines the first timer according to the RTT value between the terminal equipment and the network equipment, which is sent by the network equipment through a Radio Resource Control (RRC) signaling.

In one embodiment, the round trip time RTT value with the network device includes:

an RTT value between the terminal equipment and base station equipment or a satellite;

In one embodiment, in case that the RACH message is Msg3 or Msg a, the starting module 11 is configured to start a second timer and stop running the beam link recovery timer;

wherein the second timer comprises one of: the first timer; the terminal equipment starts a timer of the contention resolution offset at the starting time of the random access contention resolution timer.

In an embodiment, the recovery module 12 is further configured to, in case that the beam link recovery timer expires, the terminal device performs beam failure recovery only based on a contention based random access procedure.

In one embodiment, as shown in fig. 8, there is provided a beam link recovery apparatus based on a random access procedure, including:

a starting module 21, configured to start a beam link recovery timer by a terminal device at an initialization stage of random access in a beam link recovery process, and perform beam failure recovery based on a random access procedure;

an adjusting module 22, configured to adjust a duration of the beam link recovery timer based on an adjusting manner before sending the random access message; the adjustment mode is an adjustment mode of the beam link recovery timer determined by the terminal device according to the round trip time RTT value.

In one embodiment, the adjusting module 22 is further configured to determine a first adjusting factor according to the RTT value of the round trip transmission time with the network device and the RTT value configured by the network device;

the adjusting module 22 is further configured to determine a second adjusting factor according to the TA value of the time advance corresponding to the terminal device and the RTT value configured by the network device.

In an embodiment, the adjusting module 22 is configured to determine the adjusted duration of the beam link recovery timer according to the first adjustment factor or a product of the first adjustment factor and the duration of the beam link recovery timer.

the RTT value between the terminal equipment and the base station equipment or the satellite;

In one embodiment, the initiating module 21 is configured to determine the type of the performed random access procedure based on a resource type of the random access resource and a comparison result of a reference signal received power of the terminal device on at least one candidate beam for beam failure recovery and a reference signal received power threshold.

In an embodiment, the starting module 21 is configured to perform non-contention based random access when the terminal device acquires a non-contention based random access resource and a reference signal received power of the terminal device on at least one of the candidate beams is not less than a reference signal received power threshold;

a starting module 21, configured to perform contention-based random access when the terminal device acquires a non-contention-based random access resource and a reference signal received power of the terminal device on at least one of the candidate beams is smaller than a reference signal received power threshold.

In an embodiment, the adjusting module 22 is further configured to determine, by the terminal device, a first adjustment increment according to the RTT value of the round trip transmission time with the network device and the RTT value configured by the network device;

the adjusting module 22 is further configured to determine a second adjustment increment according to the TA value corresponding to the terminal device and the RTT value configured by the network device.

In one embodiment, the adjusting module 22 is further configured to determine the first adjustment increment or the second adjustment increment at the time of initialization of random access; or, determining the first adjustment increment or the second adjustment increment before each sending of the random access message.

In an embodiment, the adjusting module 22 is configured to determine the adjusted duration of the beam link recovery timer according to a sum of the first adjustment increment or the second adjustment increment and the duration of the beam link recovery timer.

In an embodiment, the starting module 21 is configured to start the beam link recovery timer when the random access initialization procedure is performed and the terminal device acquires the beam failure recovery configuration information configured by the network device for the terminal device on the currently activated UL BWP of the selected uplink carrier.

In one embodiment, the beam link recovery apparatus based on the random access procedure further includes:

and the beam failure recovery module is used for performing beam failure recovery only based on a competitive random access process by the terminal equipment under the condition that the beam link recovery timer is overtime.

Fig. 9 is a schematic diagram of an internal structure of a terminal device in one embodiment. As shown in fig. 9, the terminal device includes a processor and a memory connected by a system bus. The processor is used for providing calculation and control capacity and supporting the operation of the whole terminal equipment. The memory may include a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program is executable by a processor for implementing a method for beam link recovery based on a random access procedure provided in the following embodiments. The internal memory provides a cached execution environment for the operating system computer programs in the non-volatile storage medium. The terminal device may be any terminal device such as a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, and a wearable device. Those skilled in the art will appreciate that the architecture shown in fig. 9 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media embodying computer-executable instructions which, when executed by one or more processors, cause the processors to perform the steps of a random access procedure based beam link recovery method.

A computer program product containing instructions which, when run on a computer, cause the computer to perform a method of beam link recovery based on a random access procedure.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct Rambus Dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM), among others.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

A method for recovering a beam link based on a random access procedure is characterized in that the method comprises the following steps:

in the beam link recovery process, after the terminal equipment sends a random access RACH message, the terminal equipment starts a target timer and stops running a beam link recovery timer,

and under the condition that the target timer is overtime, the terminal equipment resumes to operate the beam link recovery timer and performs beam failure recovery based on a random access flow.
The method according to claim 1, wherein the terminal device starts a first timer and stops running the beam link recovery timer when the RACH message is Msg 1;

wherein the first timer comprises one of: the terminal equipment starts a timer of random access response offset RAR offset at the initial time of a random access response window; a configured timer.
The method of claim 2, wherein the configured timer is determined by one of:

the terminal equipment configures the first timer according to the Round Trip Time (RTT) value between the terminal equipment and network equipment;

the terminal equipment configures the first timer according to a TA (time advance) value;

the terminal equipment determines the first timer according to the RTT value between the terminal equipment and the network equipment;

and the terminal equipment determines the first timer according to the RTT value between the terminal equipment and the network equipment, which is sent by the network equipment through a Radio Resource Control (RRC) signaling.
The method of claim 3, wherein the round trip time RTT value with the network device comprises:

the RTT value between the terminal equipment and the base station equipment or the satellite;

RTT values between a ground reference point and a base station device, or a satellite.
The method according to claim 2, wherein in case that the RACH message is Msg3 or Msg a, the terminal device starts a second timer and stops running the beam link recovery timer;

wherein the second timer comprises one of: the first timer; the terminal equipment starts a timer of the contention resolution offset at the starting time of the random access contention resolution timer.
The method according to any of claims 1-5, wherein in case the beam link recovery timer expires, the terminal device performs beam failure recovery only based on a contention based random access procedure.
A method for recovering a beam link based on a random access procedure is characterized in that the method comprises the following steps:

in the initialization stage of random access in the beam link recovery process, the terminal equipment starts a beam link recovery timer and performs beam failure recovery based on a random access flow;

before the terminal equipment sends the random access message, the duration of the beam link recovery timer is adjusted based on an adjustment mode; the adjustment mode is an adjustment mode of the beam link recovery timer determined by the terminal device according to the round trip time RTT value.
The method of claim 7, wherein the determining, by the terminal device, an adjustment manner of the beam link recovery timer according to the round trip time RTT value comprises:

the terminal equipment determines a first adjustment factor according to the RTT value of the round trip transmission time between the terminal equipment and the network equipment and the RTT value configured by the network equipment;

and the terminal equipment determines a second adjustment factor according to the TA value corresponding to the terminal equipment and the RTT value configured by the network equipment.
The method of claim 8, wherein the adjusting, by the terminal device, the duration of the beam link recovery timer based on the adjustment manner comprises:

and the terminal determines the adjusted time length of the beam link recovery timer according to the first adjustment factor or the product of the first adjustment factor and the time length of the beam link recovery timer.
The method according to claim 8 or 9, wherein the round trip time RTT value with the network device comprises:

the RTT value between the terminal equipment and the base station equipment or the satellite;

RTT values between a ground reference point and a base station device, or a satellite.
The method according to claim 8 or 9, wherein, in the initialization phase of the random access in the beam link recovery process, the terminal device starts a beam link recovery timer and performs beam failure recovery based on a random access procedure, and the method comprises:

the terminal device determines the type of the random access procedure based on the resource type of the random access resource and the comparison result of the reference signal received power of the terminal device on at least one candidate beam for beam failure recovery and a reference signal received power threshold.
The method according to claim 8 or 9, wherein the determining, by the terminal device, the type of the random access procedure based on the resource type of the random access resource and the comparison result of the reference signal received power of the terminal device on at least one candidate beam for beam failure recovery with the reference signal received power threshold comprises:

when the terminal device obtains a random access resource based on non-contention and the reference signal receiving power of the terminal device on at least one candidate beam is not less than a reference signal receiving power threshold, the terminal device performs random access based on non-contention;

and under the conditions that the terminal equipment acquires non-contention-based random access resources and the reference signal received power of the terminal equipment on at least one candidate beam is smaller than a reference signal received power threshold, the terminal equipment performs contention-based random access.
The method of claim 7, wherein the determining, by the terminal device, an adjustment manner of the beam link recovery timer according to the round trip time RTT value comprises:

the terminal equipment determines a first adjustment increment according to the RTT value of the round trip transmission time between the terminal equipment and the network equipment and the RTT value configured by the network equipment;

and the terminal equipment determines a second adjustment increment according to the TA value corresponding to the terminal equipment and the RTT value configured by the network equipment.
The method of claim 13,

the terminal equipment determines the first adjustment increment or the second adjustment increment during random access initialization; or the like, or, alternatively,

the terminal device determines the first adjustment increment or the second adjustment increment before sending the random access message each time.
The method according to claim 13 or 14, wherein the terminal device adjusts the duration of the beam link recovery timer based on the adjustment manner, and comprises:

and the terminal determines the adjusted time length of the beam link recovery timer according to the sum of the first adjustment increment or the second adjustment increment and the time length of the beam link recovery timer.
The method according to any one of claims 7 to 9,

in a random access initialization process, and under the condition that the terminal device acquires beam failure recovery configuration information configured by a network device for the terminal device on a currently activated UL BWP of a selected uplink carrier, the terminal device determines the beam link recovery timer.
The method according to any of claims 7-9, wherein in case the beam link recovery timer expires, the terminal device performs beam failure recovery based only on a contention based random access procedure.
A beam link recovery apparatus based on a random access procedure, comprising:

a starting module, which is used for starting the target timer and stopping running the beam link recovery timer after the terminal equipment sends the random access RACH message in the beam link recovery process,

and the recovery module is used for recovering the running of the beam link recovery timer and performing beam failure recovery based on a random access flow under the condition that the target timer is overtime.
A beam link recovery apparatus based on a random access procedure, comprising:

the starting module is used for starting a beam link recovery timer by the terminal equipment at the initialization stage of random access in the beam link recovery process and recovering the beam failure based on the random access process;

the adjusting module is used for adjusting the duration of the beam link recovery timer based on an adjusting mode before sending the random access message; the adjustment mode is an adjustment mode of the beam link recovery timer determined by the terminal device according to the round trip time RTT value.
A terminal device, comprising: a processor, a memory, and a transceiver, said processor, said memory, and said transceiver communicating with each other through an internal connection path,

the memory for storing program code;

the processor is configured to call the program code stored in the memory to implement the steps of the method of any one of claims 1 to 6 in cooperation with the transceiver.
A terminal device, comprising: a processor, a memory, and a transceiver, said processor, said memory, and said transceiver being in communication with each other through an internal connection path,

the memory is used for storing program codes;

the processor is configured to call program code stored in the memory to implement the steps of the method of any one of claims 7 to 17 in cooperation with the transceiver.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 7 to 17.