CN115398983B - Beam link recovery method, device and equipment based on random access flow - Google Patents
Beam link recovery method, device and equipment based on random access flow Download PDFInfo
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- CN115398983B CN115398983B CN202080099596.9A CN202080099596A CN115398983B CN 115398983 B CN115398983 B CN 115398983B CN 202080099596 A CN202080099596 A CN 202080099596A CN 115398983 B CN115398983 B CN 115398983B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
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Abstract
The application relates to a beam link recovery method, a device and equipment based on a random access flow, in the beam link recovery process, after terminal equipment sends a random access 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 recovers running the beam link recovery timer and carries out beam failure recovery based on the random access flow, so that the method, the device and the equipment can adapt to the RTT of the current signal transmission from the terminal equipment to network equipment, the network equipment does not need to frequently configure the beam failure recovery timer, and signaling overhead is reduced.
Description
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 communication network (Non Terrestrial Network, NTN) technology that typically employs satellite communication to provide communication services to terrestrial users.
Compared with the cellular network adopted by the traditional NR, the Round Trip Time (RTT) of signals between the UE and the satellite in the NTN is greatly increased. Therefore, in the case where the UE triggers beam failure recovery due to continuous detection of beam failure, the time for the UE to complete beam failure recovery through the random access procedure increases accordingly. In order to control the time of beam failure recovery by the UE using non-contention based random access, the network side may configure a beam failure recovery timer (beamFailureRecoveryTimer) for the UE, by which the maximum duration of the UE using non-contention random access in the beam failure recovery process is controlled.
In order to support the larger RTT characteristic in NTN, the value range of beamFailureRecoveryTimer needs to be increased in the beam failure recovery process, and the RTT time of the UE in the NTN network also varies greatly, and when the RTT of the UE changes each time, the network reconfigures the corresponding value of beamFailureRecoveryTimer for the UE.
Disclosure of Invention
Based on this, it is necessary 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 the 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 running the beam link recovery timer and carries out 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 carries out 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; and the adjustment mode is that the terminal equipment determines the adjustment mode of the beam link recovery timer according to the round trip transmission 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, 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 the beam link recovery process,
And the recovery module is used for recovering to run the beam link recovery timer and recovering the beam failure based on the 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 in the initialization stage of random access in the beam link recovery process and carrying out beam failure recovery based on a random access flow;
The adjustment module is used for adjusting the duration of the beam link recovery timer based on an adjustment mode before sending the random access message; and the adjustment mode is that the terminal equipment determines the adjustment mode of the beam link recovery timer according to the round trip transmission 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 communicating 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 of the first aspects.
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 communicating 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 the steps of the method according to any of the second aspects in cooperation with the transceiver.
In a seventh aspect, embodiments of the present invention provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of any of the first aspects.
In an eighth aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the steps of the method of any of the second aspects.
According to the beam link recovery method, the device and the equipment based on the random access flow, 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, under the condition that the target timer is overtime, the terminal equipment recovers running the beam link recovery timer and carries out beam failure recovery based on the random access flow, because the RRT of signal transmission from the UE to the communication satellite is larger in the NTN communication process, the target timer is increased, after the random access message is sent, the target timer is started, which is equivalent to the increase of the time length of the beam link recovery timer, so that the characteristic that the RRT of signal transmission from the UE to the communication satellite is larger in the NTN communication process is adapted, under the condition that the target timer is overtime, the running of the beam link recovery timer is recovered, the RTT of signal transmission from the terminal equipment to the network equipment at present can be adapted, the network equipment does not need to frequently configure the beam failure recovery timer, and signaling cost is reduced.
Drawings
Fig. 1 is a schematic diagram 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 beam link recovery method 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 of 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
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Before describing the beam link recovery method based on the random access procedure provided by the embodiment of the application, some related technologies related to the application are introduced.
NTN-related background
The third generation partnership project (3rd Generation Partnership Project,3GPP) is currently researching NTN technology, which typically employs satellite communication to provide communication services to terrestrial users. Satellite communications have many unique advantages over terrestrial cellular communications. First, satellite communications are not limited by the user territory, for example, general land communications cannot cover areas where communication devices cannot be installed or communication is not covered due to scarcity of population, and for satellite communications, one satellite can cover a larger ground, and the satellite can orbit around the earth, so theoretically every corner of the earth can be covered by satellite communications. In addition, satellite communication has great social value, for example, satellite communication can be covered in countries or regions with low cost in remote mountain areas and poor and behind, so that people in the regions enjoy advanced voice communication and mobile internet technology, and the digital gap between developed regions is reduced, and the development of the regions is promoted. Again, the satellite communication distance is far, and the cost of communication is not increased significantly as the communication distance increases; 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 (Geostationary Earth Orbit, GEO) satellites, high elliptical Orbit (HIGH ELLIPTICAL Orbit, HEO) satellites, and the like according to the Orbit heights. LEO and GEO are the main studies at the present stage.
1、LEO
The low orbit satellite has a height ranging from 500km to 1500km and a corresponding orbit period of about 1.5 hours to 2 hours. The signal propagation delay for single hop communications between users is typically less than 20ms. The maximum satellite visibility time is 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
Geosynchronous orbit satellites have an orbit altitude of 35786km and a period of 24 hours around the earth. The signal propagation delay for single hop communications between users 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 tens or hundreds of beams to cover the ground; a satellite beam may cover a ground area of 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. Beam failure detection, i.e. the UE detects beam failure on the currently serving Synchronization signal and the PBCH block (SSB)/channel state Information (CHANNEL STATE Information), CSI, reference signal (REFERENCE SIGNAL, RS). Beam failure recovery is used by the UE to indicate a new SSB/CSI-RS to the serving cell.
The medium access Control (MEDIA ACCESS Control, MAC) layer detects beam failures by continuously counting beam failure instance indications from the physical layer. The network configures SSB/CSI-RS resources for beam failure detection to the UE through radio resource control (Radio Resource Control, RRC) signaling, while configuring a maximum number of beam failure instances (beamFailureInstanceMaxCount) and a timer for beam failure detection (beamFailureDetectionTimer). The MAC layer maintains a COUNTER bfi_counter for beam failure detection, with the initial value of bfi_counter being 0.
If the MAC layer receives the beam failure instance indication from the physical layer, then start or restart beamFailureDetectionTimer; accumulating a COUNTER BFI_COUNTER by 1; if BFI_COUNTER is greater than or equal to beamFailureInstanceMaxCount, the UE initiates a random access procedure at SpCell.
If beamFailureDetectionTimer times out, or the UE receives a reconfiguration for any of the SSB/CSI-RS resources, beamFailureInstanceMaxCount, and beamFailureDetectionTimer parameters for beam failure detection, the COUNTER bfi_counter is reset to 0.
Resetting a COUNTER BFI_COUNTER to 0 if the random access is successful; stopping beamFailureRecoveryTimer; the beam failure recovery procedure is considered to be successfully completed.
Beam failure recovery triggered random access procedure
To support the beam failure recovery procedure, the network configures the UE with the following parameters through RRC signaling:
Non-contention based Random access channel (Random ACCESS CHANNEL, RACH) resource rach-ConfigBFR for beam failure recovery;
Candidate beams for beam failure recovery (Beam Failure Recovery, BFR) and their corresponding RACH parameters list candidateBeamRSList;
L1-RSRP threshold RSRP-ThresholdSSB for UE beam selection;
the beam failure recovery timer beamFailureRecoveryTimer for controlling the UE to use the maximum duration based on the non-contention random access in the BFR procedure.
If the UE initiates random access for beam failure recovery purposes: in the random access initialization phase, the UE starts beamFailureRecoveryTimer if the network configures beamFailureRecoveryConfig for the UE on the active UL BWP of the currently selected uplink carrier.
When the UE performs RACH resource selection, if the timer beamFailureRecoveryTimer is running or the network is not configured beamFailureRecoveryTimer, and the network is configured with non-contention based RACH resources for BFR, and at least one SSB corresponding synchronization signal (Synchronization Signal, SS) -reference signal received Power (REFERENCE SIGNAL RECEIVING Power, RSRP) exists in the candidate beam configured for BFR, which is higher than a network configured RSRP-ThresholdSSB threshold, or at least one CSI-RS corresponding CSI-RSRP is higher than a network configured RSRP-ThresholdCSI-RS threshold, the UE selects one SSB from the corresponding SSBs-RSRP candidates that are higher than a RSRP-ThresholdSSB threshold, or selects one CSI-RS from the corresponding CSI-RSRP candidates that are higher than a RSRP-ThresholdCSI-RS threshold; otherwise, contention-based random access is used. If at least one corresponding SSB having an SS-RSRP higher than RSRP-ThresholdSSB of the network configuration is available in the candidate beams of the BFR, selecting one corresponding SSB having an SS-RSRP higher than RSRP-ThresholdSSB; otherwise, an SSB is arbitrarily selected.
In the random access procedure, the UE needs to wait at least 1 RTT from transmitting Msg1 to receiving Msg2 from the network. Similarly, the UE also needs to wait at least 1 RTT from sending Msg3 to Msg4 from the network. In a New Radio (NR) terrestrial network, the signal transmission delay between the UE and the network is very small, and the waiting time from the sending of the uplink transmission from the UE to the receiving of the network response by the UE is generally short, so the time required for the UE to complete the random access is generally short, and beamFailureRecoveryTimer can 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 GEO scenarios, RTT can be up to 541.46ms. Therefore, in the case where the UE triggers beam failure recovery due to continuous detection of beam failure, the time for the UE to complete beam failure recovery through the random access procedure also increases in response. The network may configure the UE with non-contention based RACH resources for beam failure recovery in order to control the time for beam failure recovery by the UE using non-contention based random access, while controlling the maximum duration of the UE using non-contention based random access in the beam failure recovery process by configuring the timer beamFailureRecoveryTimer. In order to support the larger RTT characteristics in NTN, one idea is to increase the range of values of beamFailureRecoveryTimer. However, the RTT of the UE in the NTN network also varies greatly (especially in the LEO scenario), which may cause frequent reconfiguration beamFailureRecoveryTimer of the network to take on values, resulting in large signaling overhead.
Therefore, the embodiment of the application provides a beam link recovery method based on a random access flow, which is used for solving the technical problems of large signaling overhead caused by frequent reconfiguration beamFailureRecoveryTimer values of a network due to large RTT time change of UE in an NTN network and large delay of effective time of a new parameter value caused by overlong RTT. It should be noted that, the method for recovering a beam link based on a random access procedure according to the embodiment of the present application is not limited to solving the above technical problems, but may solve other technical problems, for example, the method for recovering a beam link based on a random access procedure according to the embodiment of the present application may solve the technical problem that the effective time of a new parameter value is also delayed greatly due to too long RTT, which is not limited in the embodiment of the present application.
The beam link recovery method based on the random access procedure provided by the embodiment of the application can be applied to the NTN technology, and fig. 1 is a schematic diagram of an application scenario of the beam link recovery method based on the random access procedure provided by the embodiment of the 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 via a network. The network device 1 may be, but not limited to, a base station, LEO satellite, MEO satellite, GEO satellite, HEO satellite, etc., and the UE may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, 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 relates to a specific implementation manner of beam link recovery by using a set target timer and a beam link recovery timer configured by a network device together. As shown in fig. 2, the method comprises the steps of:
s201, after the terminal equipment sends the random access message in the beam link recovery process, the terminal equipment starts a target timer and stops running the beam link recovery timer.
The beam link recovery timer is a timer configured by the network equipment for the terminal equipment. The duration of the target timer may be the duration determined by the UE or may be the duration configured by the network device, where the target timer is used to characterize the round trip transmission time RTT of the signal transmission between the UE and the network device during the running 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 a round trip transmission time RTT variation of signal transmission between the UE and the network device.
In this embodiment, in the beam link restoration process, after the terminal device transmitter accesses the message, if the beam link restoration timer beamFailureRecoveryTimer is running, the UE starts the target timer while suspending the operation beamFailureRecoveryTimer. The UE may start the target timer after transmitting Msg1 while suspending operation beamFailureRecoveryTimer, or start the target timer after transmitting Msg3 while suspending operation beamFailureRecoveryTimer, or start the target timer after transmitting both Msg1 and Msg3 while suspending operation beamFailureRecoveryTimer, which is not limited in the embodiment of the present application.
S202, under the condition that the target timer is overtime, the terminal equipment resumes running the beam link recovery timer and resumes beam failure based on the random access flow.
In this embodiment, when the target timer expires, the terminal device resumes operation beamFailureRecoveryTimer and performs beam failure recovery based on the random access procedure. For example, when the terminal device transmitter accesses the message, beamFailureRecoveryTimer runs to 6S, the terminal device starts the target timer, and pauses beamFailureRecoveryTimer, then in case the target timer times out, the terminal device control beamFailureRecoveryTimer starts running from 6S.
In the beam link recovery method based on the random access procedure provided by the embodiment of the application, after the terminal equipment sends the random access message in the beam link recovery process, 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 carries out beam failure recovery based on the random access procedure, because the RRT of the signal transmission from the UE to the communication satellite is larger in the NTN communication process, and then adding a target timer, starting the target timer after the random access message is sent, which is equivalent to increasing the time length of a beam link recovery timer, so that the method is suitable for the characteristic that the RRT of the signal transmission from the UE to the communication satellite is larger in the NTN communication process, and recovering to run the beam link recovery timer under the condition that the target timer is overtime, so that the method can be suitable for the RTT of the signal transmission from the terminal equipment to the network equipment, the network equipment does not need to frequently configure the beam failure recovery timer, and the signaling overhead is reduced.
Based on the embodiment shown in fig. 2, the method for recovering a beam link based on the random access procedure may further include: and under the condition that the beam link recovery timer is overtime, the terminal equipment only performs beam failure recovery based on the competition random access flow.
In this embodiment, if the beam failure recovery timer expires, the beam failure recovery is performed in the contention-based random access procedure. That is, if the duration of the target timer and the beam failure recovery timer cannot meet the RRT of the current signal transmission from the terminal to the network device, the beam failure recovery can be performed based on the contention random access process, so as to ensure that the beam failure recovery can be successfully implemented.
In the embodiment shown in fig. 2, different target timers may also be set for different random access messages. In one embodiment, when the RACH message is Msg 1, 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 a random access response offset RAR offset at the starting moment of a random access response window; and (5) a configured timer.
In this embodiment, the target timer is a first timer, which may be a timer for the terminal device to start a random access response offset (Random Access Response offset, RAR offset) at the start time of the random access response window, or may be a preconfigured timer.
In the beam link recovery process, after the terminal device sends Msg1, if beamFailureRecoveryTimer is detected to be running, a first timer is started, beamFailureRecoveryTimer is paused, and under the condition that the first timer is overtime, the operation is resumed beamFailureRecoveryTimer, so that the duration of beamFailureRecoveryTimer is prolonged, and the characteristic that the RRT of signal transmission from the UE to a communication satellite is larger in the NTN communication process is adapted.
Optionally, the configured timer is determined by one of:
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 advance;
The terminal equipment determines a first timer according to the RTT value broadcasted by the network equipment and between the terminal equipment and the network equipment;
The terminal device determines a first timer according to an RTT value between the network device and the network device, which is transmitted by the network device through radio resource control (Radio Resource Control, RRC) signaling.
Further, RTT values with the network device include:
RTT value between terminal equipment and base station equipment or between terminal equipment and satellite;
RTT values between a terrestrial reference point and a base station device, or a satellite.
In this embodiment, the acquiring manner of the first timer and the value thereof may be RTT value between the terminal device and the base station device/satellite calculated by the terminal device. Or the obtaining mode of the first timer and the value of the first timer can be the RTT value between the ground reference point and the base station equipment/satellite, which is calculated by the terminal equipment. Or the obtaining mode of the first timer and the value thereof can be the timer configured by the terminal equipment 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 broadcasted by the network device between the terminal device and 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 the ground reference point and the base station device, or between the terminal device and the satellite. Or the network equipment configures the RTT value between the terminal equipment and the network equipment based on the RRC signaling, wherein the RRC information comprises the special RRC signaling, the terminal equipment can configure the first timer according to the RTT value between the terminal equipment and the network equipment configured by the network equipment based on the RRC signaling, and the RTT value between the terminal equipment and the network equipment can be the RTT value between the terminal equipment and the base station equipment or between the terminal equipment and a satellite, and can also be the RTT value between a ground reference point and the base station equipment or between the terminal equipment and the satellite. The UE can flexibly set the first timer according to actual requirements and scenes so as to improve scene applicability.
In another embodiment, in case the RACH message is Msg 3 or MsgA, 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 contention resolution offset timer at the start time of the random access contention resolution timer.
In this embodiment, the target timer is a second timer, that is, the second timer may be set for Msg 3 or MsgA. The second timer may be the first timer, i.e. after the terminal device sends Msg 3 or MsgA, if beamFailureRecoveryTimer is detected to be running, the first timer may also be started and paused beamFailureRecoveryTimer. In some scenarios, the second timer may also be a timer that starts a contention resolution offset at the 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 Msg 3 or Msg a, if beamFailureRecoveryTimer is detected to be running, the second timer is started, beamFailureRecoveryTimer is stopped, and under the condition that the second timer is overtime, the operation is recovered beamFailureRecoveryTimer, so that the duration of beamFailureRecoveryTimer is prolonged, and the characteristic that the RRT of the signal transmission from the UE to the communication satellite is larger in the NTN communication process is adapted.
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, the first timer is taken as a timer for starting the RAR offset at the starting time of the random access response window by the terminal device, and the second timer is taken as a timer for starting the contention resolution offset at the starting time of the random access contention resolution timer by the terminal device. As shown in fig. 3, when the beam failure indication COUNTER bfi_counter maintained by the MAC entity of the terminal device reaches beamFailureInstanceMaxCount, the terminal device initiates a random access procedure; 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 the UE sends Msg1, if beamFailureRecoveryTimer is running, the terminal device starts the timer of the RAR offset at the start time of the random access response window, pauses beamFailureRecoveryTimer, starts the response reception window of the random access when the timer of the RAR offset times out, and resumes the running beamFailureRecoveryTimer. When the response reception window of the random access times out, the UE starts a timer of RAR offset while suspending beamFailureRecoveryTimer after transmitting Msg1 again. When the timer of the RAR offset is timed out, a response receiving window of random access is started while the operation is resumed beamFailureRecoveryTimer, when the UE receives the Msg2, the response receiving window of random access is stopped, after the Msg3 is transmitted, the timer of the contention resolution offset (ContentionResolution offset) is started by the terminal device at the start time of the random access contention resolution timer (ra-ContentionResolutionTimer), while the suspension is paused beamFailureRecoveryTimer. When the ContentionResolution offset timer expires, ra-ContentionResolutionTimer is started while beamFailureRecoveryTimer is resumed until Mag4 is received, stopping ra-ContentionResolutionTimer.
Fig. 4 is a flowchart of a beam link recovery method based on a random access procedure, where the method 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 carries out beam failure recovery based on the 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 after adjusting the duration of the beam link recovery timer based on an adjustment manner before the random access message is sent in the previous time.
In this embodiment, when a beam failure indication COUNTER bfi_counter maintained by a MAC entity of the terminal device reaches beamFailureInstanceMaxCount, the UE initiates a random access procedure; in the random access initialization procedure, if the random access is for beam failure recovery and the network configures BeamFailureRecoveryConfig on the currently active 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, adjusting the duration of the beam link recovery timer based on an adjustment mode; and 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 each random access message is sent, the terminal device may adjust the duration of the beam link recovery timer based on the adjustment manner, so as to adapt to the current RTT of the terminal device to the network device. The adjustment mode is an adjustment mode of a beam link recovery timer determined by the terminal equipment according to an RTT value between the terminal equipment and the network equipment, and the terminal equipment can be an adjustment mode of the beam link recovery timer determined according to an actual RTT value between the current terminal equipment and the network equipment, or can be an adjustment mode of the beam link recovery timer determined jointly according to an actual RTT value between the current terminal equipment and the network equipment and a reference RTT value between the terminal equipment and the network equipment configured by the network equipment. The terminal device may determine the adjustment mode in the initialization stage of 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.
In the beam link recovery method based on the random access flow, in the initialization stage of random access in the beam link recovery process, the terminal equipment starts the beam link recovery timer, and before the terminal equipment sends the random access message, the length of the beam link recovery timer is adjusted based on the adjustment mode.
Based on the embodiment shown in fig. 4, there may be a plurality of ways to determine the adjustment manner, in one embodiment, the terminal device determines the adjustment manner of the beam link recovery timer according to the round trip time RTT value, including:
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;
The terminal device determines a second adjustment factor based on the time advance (TIMING ADVANCE, TA) value corresponding to the terminal device and the RTT value configured by the network device.
Wherein the first adjustment factor and the second adjustment factor may 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 transmission time RTT value with the network device includes:
RTT value between terminal equipment and base station equipment or between terminal equipment and satellite;
RTT values between a terrestrial 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 calculated by the terminal; the RTT value between the ground reference point and the base station device or between the ground reference point and the satellite, which are calculated by the terminal, may also be obtained.
In this embodiment, the terminal device may determine a first adjustment factor according to the RTT value with the network device and the RTT value configured by the network device, and adjust the 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 duration of the adjusted beam link recovery timer according to the first adjustment factor or the product of the first adjustment factor and the duration of the beam link recovery timer.
In this embodiment, the terminal device determines the adjusted duration of the 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 adjusted duration of the 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 the signal transmission between the terminal device and the network and the RTT of the network device configuration, scale factor 1=rtt value between the network device and the network device/RTT of the network device configuration; the UE adjusts beamFailureRecoveryTimer duration to: the product of beamFailureRecoveryTimer durations of 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: value of scale factor2 = TA/RTT of network device configuration; the UE adjusts beamFailureRecoveryTimer duration to: the product of beamFailureRecoveryTimer durations of network configuration and scale factor 2.
According to the beam link recovery method based on the random access flow, the terminal device determines the first adjustment factor according to the RTT value between the terminal device and the network device and the RTT value configured by the network device, or the terminal device determines the second adjustment factor according to the TA value corresponding to the terminal device and the RTT value configured by the network device, the adjusted time length of the beam link recovery timer is determined according to the first adjustment factor or the product of the first adjustment factor and the time length of the beam link recovery timer, and the second adjustment factor is related to the TA value corresponding to the terminal device because the first adjustment factor is related to the RTT value between the terminal device and the network device currently, so that the method can adapt to the RTT between the terminal device and a base station or a satellite currently and ensure the beam link recovery quality.
In the beam failure recovery process described above, it is also necessary to determine the type of random access procedure. 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 procedure based on the resource type of the random access resource and the comparison result of the reference signal received power and the reference signal received power threshold of the terminal device on at least one candidate beam for beam failure recovery.
In this embodiment, the network device configures the relevant parameters of beam failure recovery for the terminal device in advance. For example, the UE in the connected state receives the RRC reconfiguration message sent by the gNB, and obtains RadioLinkMonitoringConfig and BeamFailureRecoveryConfig configurations, which includes:
RadioLinkMonitoringConfig configuration: at least SSB/CSI-RS resource configuration failureDetectionResources for beam failure detection, beam failure example maximum number beamFailureInstanceMaxCount, beam failure monitoring timer beamFailureDetectionTimer.
BeamFailureRecoveryConfig configuration: the method at least comprises non-contention based RACH resource configuration RACH-ConfigBFR for BFR, candidate beams for BFR and a corresponding RACH parameter list candidateBeamRSList, L1-RSRP threshold RSRP-ThresholdSSB for beam selection by UE in BFR process, and beam failure recovery timer beamFailureRecoveryTimer for controlling UE to use maximum duration based on non-contention random access in BFR process.
Therefore, in the beam recovery process, the terminal device may determine the type of the random access procedure based on the resource type configured in the parameter information configured by the network device and the comparison result of the reference signal received power on at least one candidate beam for beam failure recovery and the reference signal received power threshold.
Further, the determining, by the terminal device, a type of the random access procedure based on a resource type of the random access resource and a comparison result of the reference signal received power on at least one candidate beam for beam failure recovery and the reference signal received power threshold, includes:
under the condition that the terminal equipment acquires non-contention based random access resources and the reference signal receiving power of the terminal equipment on at least one candidate beam is not less than a reference signal receiving power threshold, the terminal equipment performs non-contention based random access;
And under the condition that the terminal equipment acquires non-contention-based random access resources and the reference signal receiving power of the terminal equipment on at least one candidate beam is smaller than a reference signal receiving power threshold, the terminal equipment performs contention-based random access.
In this embodiment, if the network device configures non-contention based random access resources 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 of the network configuration, the UE uses non-contention based random access; if the network device does not configure non-contention based random access resources for the terminal device or the terminal device's RSRP on all candidate beams for BFR is less than the network configuration RSRP threshold, contention based random access is used.
According to the beam link recovery method based on the random access procedure, the terminal equipment 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 and the reference signal received power threshold of at least one candidate beam for beam failure recovery, selects the proper type of the random access procedure according to the resource type of different random access resources and the reference signal received power of the candidate beam for beam failure recovery, can adapt to various scenes, and improves universality of the beam link recovery method based on the random access procedure.
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 the beam failure indication COUNTER bfi_counter maintained by the MAC entity of the terminal device reaches beamFailureInstanceMaxCount, the terminal device initiates a random access procedure; the terminal device determines a scaling factor according to the calculated RTT of signal transmission between the UE and the network or according to the currently used TA value, in combination with a reference RTT of network configuration, for example: scale factor = UE TA/reference RTT. In the random access initialization procedure, if the random access is for beam failure recovery and the network is configured BeamFailureRecoveryConfig on the currently active UL BWP of the uplink carrier selected by the UE, the UE starts BeamFailureRecoveryConfig and adjusts beamFailureRecoveryTimer duration to be before each random access message is sent: the product of beamFailureRecoveryTimer times the scaling factor for the network configuration. The operation mechanism of the RAR offsets and ContentionResolution offset is similar to that of the embodiment shown in fig. 3, and will not be described again here.
Another specific implementation procedure for determining the adjustment mode of the beam link recovery timer is described in the following through another embodiment. The terminal equipment determines the adjustment mode of the beam link recovery timer according to the round trip time RTT value, and the adjustment mode comprises the following steps:
the terminal equipment determines a first adjustment increment according to the round trip transmission 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 time advance 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 may be used to adjust the duration of the beam link recovery timer. Optionally, the first adjustment increment is a difference between the RTT value between the terminal device and the network device and the RTT value configured by the network device, and the second adjustment increment is a difference between the TA value corresponding to the terminal device and the 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 the RTT value with the network device and the RTT value configured by the network device, and adjust the 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.
Further, the terminal device adjusts the duration of the beam link recovery timer based on the adjustment mode, including:
And the terminal determines the duration of the adjusted beam link recovery timer according to the sum of the first adjustment increment or the second adjustment increment and the duration of the beam link recovery timer.
In this embodiment, the terminal device determines the adjusted duration of the beam link recovery timer according to the sum of the first adjustment increment and the duration of the beam link recovery timer, or determines the adjusted duration of the 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 beamFailureRecoveryTimer the adjustment delta1 = of the duration and the RTT of the RTT-network configuration of the signal transmission between the network according to the calculated RTT of the signal transmission between the terminal device and the network in combination with the RTT of the network configuration. The beamFailureRecoveryTimer time period is adjusted to beamFailureRecoveryTimer + delta1 before sending the random access message.
For another example, the terminal device determines beamFailureRecoveryTimer the adjusted delta2 = TA value of the duration and RTT of the network configuration according to the currently used TA value in combination with RTT of the network configuration. The beamFailureRecoveryTimer duration is adjusted to beamFailureRecoveryTimer + delta2 before sending the random access message.
According to the beam link recovery method based on the random access flow, the terminal device determines the first adjustment increment according to the RTT value between the terminal device and the network device and the RTT value configured by the network device, or the terminal device determines the second adjustment increment according to the TA value corresponding to the terminal device and the RTT value configured by the network device, and determines the time length of the adjusted beam link recovery timer according to the first adjustment increment or the product of the first adjustment increment and the time length of the beam link recovery timer.
Optionally, the terminal device determines a first adjustment increment or a second adjustment increment when initializing random access; or, the terminal device determines the first adjustment increment or the second adjustment increment before each time the random access message is transmitted.
In this embodiment, the terminal device may calculate the adjustment increment delta of the beamFailureRecoveryTimer duration (i.e. calculate only once) in the current random access initialization stage, and in the random access process, the UE adjusts the duration of beamFailureRecoveryTimer used based on the adjustment increment delta of the beamFailureRecoveryTimer duration before transmitting Msg1 and Msg3 each time. In the current random access process, an adjustment increment is calculated once in an initialization stage, so that the calculated amount is reduced.
Or considering that the RTT of the communication between the terminal device and the network in the LEO scenario changes rapidly, the terminal device may also calculate, before each transmission of Msg1 and Msg3 in the random access process, an adjustment increment delta of beamFailureRecoveryTimer duration based on a comparison between the current RTT of the terminal device and a reference RTT configured by the network (i.e. the UE calculates once before each uplink transmission), and adjust the beamFailureRecoveryTimer duration used based on the adjustment increment delta of beamFailureRecoveryTimer duration. Because the terminal equipment calculates the adjustment increment once before each uplink transmission, the target timer obtained according to the adjustment increment is more in line with the RTT of the current communication between the terminal equipment and the network.
Fig. 6 is a timing diagram of a beam link recovery method based on a random access procedure according to an embodiment. As shown in fig. 6, when the beam failure indication COUNTER bfi_counter maintained by the MAC entity of the terminal device reaches beamFailureInstanceMaxCount, the terminal device initiates a random access procedure; the UE determines an adjustment delta for beamFailureRecoveryTimer time periods: and the UE determines the adjustment increment delta=UE TA-reference RTT of beamFailureRecoveryTimer time according to the calculated RTT of signal transmission between the UE and the network or according to the currently used TA value and the reference RTT configured by the network. In this embodiment, the UE calculates the adjustment increment delta of the beamFailureRecoveryTimer duration (i.e. only one calculation) in 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 transmitting Msg1 and Msg3 each time. This embodiment is different from the embodiment shown in fig. 5 in that the length of beamFailureRecoveryTimer used needs to be adjusted according to the adjustment increment delta before each uplink message is sent, and the operation mechanisms of other RAR offsets and ContentionResolution offset are similar to those of the embodiment shown in fig. 3, and are not repeated here.
Based on the embodiment shown in fig. 4, in the beam link recovery method based on the random access procedure, when the random access initialization process is performed, and the terminal device obtains the beam failure recovery configuration information configured by the network device for the terminal device on the UL BWP currently activated by the selected uplink carrier, the terminal device starts the beam link recovery timer.
In this embodiment, in the random access initialization process, and when the terminal device acquires beam failure recovery configuration information configured by the network device for the terminal device on the UL BWP currently activated by 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 an adjustment factor or an adjustment increment before sending the random access information each time. Or in the initialization stage, the beam link recovery timer after the adjustment of the time length is directly started according to the adjustment factor or the adjustment increment, and before each random access message is sent, the adjustment factor or the adjustment increment can be updated continuously, and the time length of the beam link recovery timer can 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 expires, the terminal device performs beam failure recovery based only on the contention based random access procedure.
In this embodiment, when the beam link recovery timer is still timed out after the duration of the beam link recovery timer is adjusted according to the adjustment factor or the adjustment increment, the terminal device may perform beam failure recovery based on the contention random access procedure, so as to ensure the reliability of beam failure recovery 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 the target timer and stop running the beam link recovery timer after the terminal device sends the random access RACH message in the beam link recovery process,
And the recovery module 12 is used for recovering to run the beam link recovery timer and recovering beam failure based on a random access flow when the target timer is overtime.
In one embodiment, when the RACH message is Msg 1, a starting module 11 is configured to start a first timer and stop running the beam link recovery timer;
wherein the first timer comprises one of: the terminal equipment starts a timer of a random access response offset (RAR offset) at the starting moment of a random access response window; and (5) a configured timer.
In one embodiment, the configured timer is determined by one of:
the terminal equipment configures the first timer according to the round trip transmission time RTT value between the terminal equipment and the network equipment;
The terminal equipment configures the first timer according to the time advance TA value;
the terminal equipment determines the first timer according to the RTT value broadcasted by the network equipment and between the terminal equipment and the network equipment;
And the terminal equipment determines the first timer according to the RTT value between the network equipment and the network equipment, which is sent by the network equipment through the Radio Resource Control (RRC) signaling.
In one embodiment, the round trip transmission time RTT value with the network device includes:
the RTT value between the terminal equipment and the base station equipment or between the terminal equipment and a satellite;
RTT values between a terrestrial reference point and a base station device, or a satellite.
In one embodiment, when the RACH message is Msg 3 or MsgA, 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 device starts a contention resolution offset timer at a start time of a random access contention resolution timer.
In one embodiment, the recovery module 12 is further configured to perform beam failure recovery by the terminal device based on only the contention random access procedure if the beam link recovery timer expires.
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 at an initialization stage of random access in a beam link recovery process, and perform beam failure recovery based on a random access procedure;
The adjustment module 22 is configured to adjust a duration of the beam link recovery timer based on an adjustment manner before sending the random access message; and the adjustment mode is that the terminal equipment determines the adjustment mode of the beam link recovery timer according to the round trip transmission time RTT value.
In one embodiment, the adjusting module 22 is further configured to determine a first adjustment 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 adjustment factor according to the time advance TA value corresponding to the terminal device and the RTT value configured by the network device.
In one 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.
In one embodiment, the round trip transmission time RTT value with the network device includes:
the RTT value between the terminal equipment and the base station equipment or between the terminal equipment and a satellite;
RTT values between a terrestrial reference point and a base station device, or a satellite.
In one embodiment, the starting module 21 is configured to determine 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 on at least one candidate beam for beam failure recovery and the reference signal received power threshold.
In one embodiment, the starting module 21 is configured to perform non-contention based random access when the terminal device acquires non-contention based random access resources and the reference signal received power of the terminal device on at least one candidate beam 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 non-contention-based random access resources and the reference signal received power of the terminal device on at least one candidate beam is less than a reference signal received power threshold.
In one embodiment, the adjustment module 22 is further configured to determine the 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 time advance TA value corresponding to the terminal device and the RTT value configured by the network device.
In one embodiment, the adjustment module 22 is further configured to determine the first adjustment increment or the second adjustment increment at random access initialization; or, determining the first adjustment increment or the second adjustment increment before each time the random access message is sent.
In one embodiment, the adjusting module 22 is configured to determine the adjusted duration of the beam link recovery timer according to the sum of the first adjustment increment or the second adjustment increment and the duration of the beam link recovery timer.
In one embodiment, the starting module 21 is configured to start the beam link recovery timer when the terminal device acquires beam failure recovery configuration information configured by the network device on the UL BWP currently activated on the selected uplink carrier for the terminal device during the random access initialization procedure.
In one embodiment, the beam link recovery device based on the random access procedure further includes:
and the beam failure recovery module is used for carrying out beam failure recovery by the terminal equipment based on the competition random access flow only 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 through a system bus. Wherein the processor is configured to provide computing and control capabilities to support operation of the entire terminal device. 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 may be executed by a processor to implement a beam link recovery method based on a random access procedure as provided in the following embodiments. The internal memory provides a cached operating environment for 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 car-mounted computer, and a wearable device. It will be appreciated by persons skilled in the art that the architecture shown in fig. 9 is merely a block diagram of some of the architecture relevant to the present inventive arrangements and is not limiting as to the computer device to which the present inventive arrangements are applicable, and that a particular computer device may include more or fewer components than shown, or may combine some of the 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 containing computer-executable instructions that, 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 comprising instructions that, when run on a computer, cause the computer to perform a method of beam link recovery based on a random access procedure.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile 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 (SYNCHLINK) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (9)
1. A method for beam link recovery based on a random access procedure, the method comprising:
In the beam link recovery process, after terminal equipment sends random access RACH information, the terminal equipment starts a target timer and stops running the beam link recovery timer, wherein the target timer is used for representing round trip transmission time RTT of signal transmission between the terminal equipment and network equipment during the running period of the beam failure recovery timer;
And under the condition that the target timer is overtime, the terminal equipment resumes running the beam link recovery timer and carries out beam failure recovery based on a random access flow.
2. The method according to claim 1, wherein in case the RACH message is Msg 1, the terminal device starts a first timer and stops running the beam link recovery timer;
wherein the first timer comprises one of: the terminal equipment starts a timer of a random access response offset (RAR offset) at the starting moment of a random access response window; and (5) a configured timer.
3. 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 transmission time RTT value between the terminal equipment and the network equipment;
The terminal equipment configures the first timer according to the time advance TA value;
the terminal equipment determines the first timer according to the RTT value broadcasted by the network equipment and between the terminal equipment and the network equipment;
And the terminal equipment determines the first timer according to the RTT value between the network equipment and the network equipment, which is sent by the network equipment through the Radio Resource Control (RRC) signaling.
4.A method according to claim 3, characterized in that the round trip transmission time RTT value with the network device comprises:
the RTT value between the terminal equipment and the base station equipment or between the terminal equipment and a satellite;
RTT values between a terrestrial reference point and a base station device, or a satellite.
5. The method according to claim 2, wherein in case the RACH message is Msg 3 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 device starts a contention resolution offset timer at a start time of a random access contention resolution timer.
6. 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 based on only a contention based random access procedure.
7. A beam link recovery apparatus based on a random access procedure, comprising:
The system comprises a starting module, a target timer and a network device, wherein the starting module is used for starting the target timer and stopping running the beam link recovery timer after a terminal device sends a random access RACH message in the beam link recovery process, and the target timer is used for representing round trip transmission time RTT of signal transmission between the terminal device and the network device during the running period of the beam failure recovery timer;
And the recovery module is used for recovering to run the beam link recovery timer and recovering the beam failure based on the random access flow under the condition that the target timer is overtime.
8. 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, characterized in that,
The memory is used for storing program codes;
the processor is configured to invoke the program code stored in the memory to implement the steps of the method according to any of claims 1 to 6 in cooperation with the transceiver.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
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| PCT/CN2020/091921 WO2021232434A1 (en) | 2020-05-22 | 2020-05-22 | Beam link recovery method, apparatus, and device based on random access procedure |
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| CN109076619A (en) * | 2018-07-16 | 2018-12-21 | 北京小米移动软件有限公司 | Random access control method and random access control device |
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| CN110022607B (en) * | 2018-01-08 | 2021-02-05 | 电信科学技术研究院 | Beam failure recovery method, device and equipment |
| US10805148B2 (en) * | 2018-02-05 | 2020-10-13 | Ofinno, Llc | Beam failure recovery request procedure |
| CN110139391B (en) * | 2018-02-09 | 2021-02-02 | 维沃移动通信有限公司 | Beam failure event processing method and device and terminal equipment |
| CN110324908B (en) * | 2018-03-28 | 2022-08-02 | 维沃移动通信有限公司 | Beam failure processing method, terminal and network equipment |
| WO2019194608A1 (en) * | 2018-04-05 | 2019-10-10 | Innovative Technology Lab Co., Ltd. | Method and apparatus for processing beam failure recovery |
| CN112335302A (en) * | 2018-07-13 | 2021-02-05 | Oppo广东移动通信有限公司 | Method, apparatus and storage medium for indicating beam failure repair |
| US10959284B2 (en) * | 2018-08-08 | 2021-03-23 | Qualcomm Incorporated | Beam failure detection and indication in DRX mode |
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| CN109076619A (en) * | 2018-07-16 | 2018-12-21 | 北京小米移动软件有限公司 | Random access control method and random access control device |
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