WO2019179514A1 - 在用户设备上运行的方法及用户设备 - Google Patents

在用户设备上运行的方法及用户设备 Download PDF

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Publication number
WO2019179514A1
WO2019179514A1 PCT/CN2019/079211 CN2019079211W WO2019179514A1 WO 2019179514 A1 WO2019179514 A1 WO 2019179514A1 CN 2019079211 W CN2019079211 W CN 2019079211W WO 2019179514 A1 WO2019179514 A1 WO 2019179514A1
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Prior art keywords
random access
beam failure
secondary cell
counter
failure recovery
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PCT/CN2019/079211
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English (en)
French (fr)
Inventor
张崇铭
山田升平
罗超
刘仁茂
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夏普株式会社
张崇铭
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Application filed by 夏普株式会社, 张崇铭 filed Critical 夏普株式会社
Priority to US16/980,871 priority Critical patent/US20210029745A1/en
Priority to EP19772073.3A priority patent/EP3771282A1/en
Publication of WO2019179514A1 publication Critical patent/WO2019179514A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and user equipment running on a user equipment (UE).
  • UE user equipment
  • the research topic of the new 5G wireless access technology was proposed at the 3rd Generation Partnership Project (3GPP) RAN#64 plenary meeting held in March 2016 (see Non-Patent Document: RP-160671 New SID Proposal: Study on New Radio Access Technology).
  • 3GPP 3rd Generation Partnership Project
  • RAN#64 plenary meeting held in March 2016 see Non-Patent Document: RP-160671 New SID Proposal: Study on New Radio Access Technology.
  • the working frequency band of the new communication system can be extended to 100 GHz, and at the same time, it will meet at least the enhanced mobile broadband service requirements, the communication requirements of massive IoT UEs, and the business requirements of high reliability requirements.
  • the research work of the project will end in 2018.
  • the transmission of data/information is interrupted, and beam failure may occur as a beam failure.
  • the UE will send relevant request information (eg, beam failure recovery request) to the network, request reconfiguration, or restore a valid working beam.
  • request information may be a specific preamble sequence.
  • the PDCCH is transmitted in the beam direction, and the PDCCH is scrambled by the C-RNTI of the UE.
  • the recovery request is considered to be a response, and the entire beam transmission failure recovery process is successfully completed.
  • Beamforming can be used in conjunction with carrier aggregation techniques.
  • the base station may be configured with multiple carriers for the UE, and the different carriers may correspond to different serving cells, including at least one primary cell (Pcell) and one or several secondary cells (Scells).
  • Both the primary cell and the secondary cell can employ beamforming techniques, and once beam transmission failure occurs, recovery can be performed.
  • the primary and secondary cells can adopt the same beam transmission failure recovery process.
  • the primary cell is always configured with a PRACH resource, and the secondary cell is not necessarily configured with a PRACH resource.
  • the secondary cell is not configured with the PRACH resource, if the beam transmission fails on the secondary cell, the preamble for indicating the beam failure recovery request needs to be sent by using the PRACH transmission resource of the primary cell, and then the UE waits on the secondary cell to send the received base station. response.
  • the random access procedure performed in the primary cell fails successfully, for example, the number of times the preamble is transmitted exceeds the maximum allowed number of transmissions, the MAC layer indicates to the upper layer that a random access problem has occurred, resulting in a link. Release and reconstruction.
  • the link performance of the primary cell may be able to work normally. Therefore, the false access random access problem causes unnecessary link release and reconstruction, which leads to waste of resources, which needs to be solved. problem.
  • the trigger of random access is determined by the value of the counter BFI_COUNTER.
  • the first random access procedure is triggered when the value of BFI_COUNTER is equal to a specific value.
  • the currently performed random access procedure may fail. Once this happens, it means that the UE has a problem in the link of the secondary cell and cannot recover.
  • the BFI_COUNTER is likely to be re-counted and equal to a specific value again, thereby triggering the random access procedure again, causing the UE to continue to send random access on a secondary cell that has a link problem. How to avoid such situations is also a problem that needs to be solved.
  • Embodiments of the present invention are directed to at least solving the above problems and/or disadvantages and at least the advantages described below.
  • a method for operating on a User Equipment comprising: using a preamble transmission counter COUNTER to count the number of transmissions of a preamble during a random access procedure;
  • a preamble transmission counter COUNTER When the value of the preamble transmission counter COUNTER indicates that the number of times the preamble is transmitted reaches or exceeds the preset maximum number of transmissions, it is determined whether to indicate a random access problem to the upper layer of the UE based on one of the following items: (1) a random access procedure Whether the transmitted preamble corresponds to the reference signal of the secondary cell; or (2) whether the random access channel timing used by the random access procedure corresponds to the reference signal of the secondary cell.
  • a method of operating on a UE comprising: determining a state of a random access procedure by using a preamble transmission counter COUNTER or a counter BFI_COUNTER related to a beam failure instance BFI; And according to the state of the random access procedure, the secondary cell is activated according to one of the following items: (1) the preamble of the random access procedure is sent on the secondary cell, and the random access procedure is triggered by the beam failure recovery.
  • the beam failure recovery process is not successfully completed, and the beam failure recovery process is a beam failure recovery associated with the secondary cell or performed on the secondary cell a beam failure recovery process; or (3) when a random access procedure is associated with beam failure recovery on the secondary cell, a beam failure recovery timer is initiated and the beam failure recovery timer expires.
  • a method for operating on a UE may include: transmitting, to a base station, information indicating that a secondary cell has failed to recover from a beam failure to indicate to the base station that beam failure recovery of the secondary cell occurs. Failure; and receiving an indication/message from the base station to deactivate the secondary cell and deactivating the secondary cell.
  • a method for running on a UE may include: when a random access procedure triggered by a beam failure recovery is not successfully completed, determining that a beam failure recovery process fails, and hanging The detection of the beam failure and the beam failure recovery process; the upper layer indicates information related to the failure of the beam failure recovery process; and the corresponding indication is received from the upper layer to initiate the detection of the beam failure and the beam failure recovery process.
  • a UE including a memory and a processor storing instructions, the processor being configured to execute an instruction stored in a memory to: use a preamble to transmit a counter COUNTER statistics at The number of times the preamble is transmitted during the random access procedure; and when the value of the preamble transmission counter COUNTER indicates that the number of times the preamble is transmitted reaches or exceeds a preset maximum number of transmissions, whether to determine to the upper layer of the UE based on one of the following items (Preferably, the upper layer may be the RRC layer of the UE) indicating a random access problem: (1) whether the preamble transmitted by the random access procedure corresponds to the reference signal of the secondary cell; or (2) random access adopted by the random access procedure Whether the incoming channel timing corresponds to the reference signal of the secondary cell.
  • a UE including a memory storing a program and a processor configured to execute an instruction stored in a memory to: transmit a counter COUNTER or with a preamble
  • the beam failure instance BFI related counter BFI_COUNTER determines the state of the random access procedure; and according to the state of the random access procedure, the secondary cell is activated based on one of the following: (1) the preamble of the random access procedure is in the Transmitted on the secondary cell, and the random access procedure is triggered by beam failure recovery; (2) when the random access procedure is not successfully completed, the beam failure recovery process is not successfully completed, and the beam failure recovery process is a secondary cell related failure recovery or a beam failure recovery process performed on the secondary cell; or (3) a start beam failure recovery timer when the random access procedure is related to beam failure recovery on the secondary cell And the beam failure recovery timer expires.
  • a UE including a memory and a processor storing instructions, the processor being configured to execute an instruction stored in a memory to: send a signal indicating a secondary cell to a base station
  • the failure recovery information fails to indicate to the base station that the secondary cell's beam failure recovery has failed; and receives an indication/message from the base station to deactivate the secondary cell and deactivates the secondary cell.
  • a UE including a memory and a processor storing instructions, the processor being configured to execute an instruction stored in a memory to: randomize when a beam failure recovery trigger When the ingress process is not successfully completed, it is determined that the beam failure recovery process fails, and the beam failure detection and beam failure recovery process are suspended; the upper layer indicates information related to the beam failure recovery process failure; and the corresponding indication is received from the upper layer to start Detection of beam failure and beam failure recovery process.
  • FIG. 1 illustrates a flow diagram of a method of operating on a UE in accordance with an embodiment of the present disclosure
  • FIG. 2 shows a flow diagram of a method of operating on a UE in accordance with further embodiments of the present disclosure
  • FIG. 3 shows a flow diagram of a method of operating on a UE in accordance with further embodiments of the present disclosure
  • FIG. 4 shows a flow diagram of a method of operating on a UE in accordance with further embodiments of the present disclosure
  • FIG. 5 illustrates a flow diagram of a method of operating on a UE in accordance with further embodiments of the present disclosure
  • FIG. 6 shows a block diagram of a UE in accordance with an embodiment of the present disclosure.
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as an eLTE communication system, and can be applied to other base stations and UE devices, such as base stations and UEs supporting eLTE. device.
  • the present invention is not limited to the scenario of radio link interruption due to beam/beamforming, and can also be used for wireless link interruption scenarios due to other reasons.
  • the physical layer of the UE indicates to the MAC layer, and such an indication is called a beam failure instance (beam failure). Instance, BFI);
  • the UE uses the BFI-related counter BFI_COUNTER to count the number of received indications;
  • the detection timer beamFailureDetectionTimer associated with beam failure detection is initiated or restarted, and the value of BFI_COUNTER is incremented by one;
  • BFI_COUNTER When the value of BFI_COUNTER is equal to (or exceeds) a specific value, for example, the value of BFI_COUNTER is equal to the maximum number of pre-BFI plus one (beamFailureInstanceMaxCount+1), then the MAC layer triggers a random access procedure, that is, the UE sends a preamble. Request to resume beam failure or request link reconfiguration;
  • the UE sets BFI_COUNTER to an initial value (for example, the initial value of BFI_COUNTER may be zero).
  • COUNTER preamble transmission COUNTER
  • Step 1 Start COUNTER. Specifically, when the random access procedure is initialized/triggered, set the value of COUNTER to one;
  • Step 2 Count the number of times the preamble is transmitted during the random access procedure, specifically, when the UE does not receive the response to the UE within a time window, and when the contention conflict resolution is not successful (for example, the contention conflict resolution timing) When the timeout expires, the value of COUNTER is incremented by one;
  • Step 3 Determine whether the value of COUNTER is equal to a specific value.
  • the specific value may be equal to the maximum allowable number of transmissions of the preamble plus one.
  • the UE may continue to send the preamble, and may continue to perform step two;
  • the MAC will indicate to the upper layer of the UE that a Random Access Problem has occurred or that a problem has occurred to the upper layer of the UE, the problem is a random Access problems, here and below, are collectively referred to as indicating random access problems.
  • the upper layer may determine that a radio link failure has occurred, and then may trigger an RRC connection re-establishment procedure.
  • COUNTER it is judged whether the value of COUNTER is equal to the maximum number of transmissions plus one, which is equivalent to determining whether the value of COUNTER exceeds (greater than) the predetermined maximum number of transmissions. If the initial value of COUNTER is zero, then the determination here may be to determine whether the value of COUNTER is equal to the predetermined maximum number of transmissions.
  • the solution described in the first embodiment, the second embodiment, and/or the third embodiment may be adopted.
  • Embodiment 1 will be described in detail below with reference to FIG. 1.
  • the UE determines whether the random access problem occurs in the upper layer according to whether the preamble sent by the random access procedure is associated with or associated with the reference signal on the secondary cell.
  • the reference signal may be an SSB or a CSI-RS signal transmitted by the base station on the secondary cell.
  • the solution of this embodiment can be as follows:
  • the UE may be the MAC layer of the UE, reporting or indicating a random access problem to the upper layer.
  • the upper layer here may be the RRC layer of the UE;
  • the UE preferably, may be the MAC layer of the UE, does not report to the upper layer or indicates a random access problem, and optionally , can report to the upper layer or indicate beam failure recovery failure.
  • the upper layer here may be the RRC layer of the UE.
  • the UE determines that the current random access procedure fails or does not complete successfully.
  • the foregoing preamble is associated with or associated with the reference signal of the secondary cell, and the preamble has a corresponding relationship or association with the reference signal sent by the secondary cell.
  • the first preamble or the corresponding base station is in the secondary cell.
  • the transmitted first reference signal in particular, may be the preamble corresponding to the beam direction of the first reference signal. It can be understood that when the base station receives the first preamble sent by the UE, it can be known that the signal quality measured by the UE in the direction in which the base station sends the first reference signal meets the measurement requirement.
  • Embodiment 2 will be described in detail below with reference to FIG.
  • the random access resource may be used to determine whether a random access problem needs to be indicated to the upper layer.
  • a random access channel PRACH occasion
  • the PRACH channel may be represented by time and frequency, and the PRACH occasion may be understood as a PRACH at a specific time or a PRACH on a specific frequency, or may also be a PRACH on a carrier or a subcarrier.
  • Corresponding or associating the PRACH occasion with the secondary cell reference signal may refer to a random access channel at a certain time/frequency/carrier corresponding to or associated with a reference signal transmitted by the secondary cell or a beam direction for transmitting the reference signal.
  • the first embodiment can be evolved as:
  • the UE selects or uses the PRACH occasion according to the random access procedure to associate or associate with the reference signal on the secondary cell to determine whether a random access problem needs to be indicated to the upper layer.
  • the solution of the second embodiment can be as follows:
  • the UE may be the MAC layer of the UE, reporting or indicating a random access problem to the upper layer.
  • the upper layer here may be the RRC layer of the UE;
  • the UE preferably, may be the MAC layer of the UE, does not report to the upper layer or indicates a random access problem, and Alternatively, the beam failure recovery failure may be reported to the upper layer or indicated.
  • the upper layer here may be the RRC layer of the UE.
  • the UE determines that the current random access procedure fails or does not complete successfully.
  • the first PRACH occasion may be represented or corresponding to (or associated with) the base station.
  • the first reference signal sent by the secondary cell in particular, may correspond to the beam direction of the first reference signal. It can be understood that when the base station receives the preamble transmitted by the UE on the first PRACH occasion, it can be known that the signal quality measured by the UE in the direction in which the base station sends the first reference signal meets the measurement requirement.
  • the UE After transmitting the preamble, the UE monitors the PDCCH on the serving cell, which refers to a serving cell involved in beam failure, that is, a serving cell in which beam failure or beam failure recovery occurs.
  • the serving cell refers to a serving cell involved in beam failure, that is, a serving cell in which beam failure or beam failure recovery occurs.
  • the UE may consider that the random access response fails to be received, and the value of the COUNTER is incremented by one. .
  • Embodiment 1 or Embodiment 2 may be performed.
  • embodiments of the present disclosure provide a method for operating on a User Equipment (UE) (preferably, may be a MAC layer of a UE), the method may include: transmitting a counter COUNTER statistics using a preamble The number of transmissions of the preamble in the random access procedure; and when the value of the preamble transmission counter COUNTER indicates that the number of transmissions of the preamble reaches or exceeds a preset maximum number of transmissions, determining whether to the UE based on one of the following items
  • the upper layer (preferably, the upper layer may be the RRC layer of the UE) indicates a random access problem:
  • the upper layer is indicated to the upper layer by the random access problem; and the preamble and the auxiliary sent by the random access procedure are used.
  • the reference signal of the cell corresponds, the random access problem is not indicated to the upper layer.
  • the reference signal may be an SSB or CSI-RS signal sent by the base station on the secondary cell.
  • the random access problem when the random access channel timing adopted by the random access procedure does not correspond to the reference signal of the secondary cell, the random access problem is indicated to the upper layer of the UE; and when the random access procedure adopts random When the access channel timing corresponds to the reference signal of the secondary cell, the random access problem is not indicated to the upper layer of the UE.
  • the method may further include: listening to a physical downlink control channel (PDCCH) on a serving cell where beam failure recovery occurs, where the preamble is used to transmit a counter COUNTER statistics in a random access procedure.
  • the number of times the code is sent includes: when the random access response time window times out, if the PDCCH addressed to the cell radio network temporary identifier (C-RNTI) is not received on the serving cell where the beam failure recovery occurs, the random access is determined.
  • C-RNTI cell radio network temporary identifier
  • the response reception fails, and the value of the preamble transmission counter COUNTER is incremented by one.
  • Embodiment 4 In order to prevent the random access procedure triggered by the UE after the failure of the random access procedure triggered by the beam failure recovery performed by the UE on the secondary cell, the solution described in Embodiment 4 to Embodiment 8 may be adopted.
  • Embodiment 4 and Embodiment 5 will be described in detail below with reference to FIG. 3.
  • COUNTER When the value of COUNTER is equal to a specific value, for example, preambleTxMax+1, if the preamble of the random access is sent on the secondary cell, then the random access procedure is considered not successfully completed (or the random access procedure is considered to be failed), and If the random access procedure is triggered by beam failure recovery, the secondary cell can be deactivated.
  • a specific value for example, preambleTxMax+1
  • COUNTER When the value of COUNTER is equal to a specific value, if the preamble of the random access is transmitted on the secondary cell, and if the random access procedure is triggered by beam failure recovery, the secondary cell may be deactivated.
  • the beam failure recovery process may not be considered successful.
  • the beam failure recovery process is for beam failure recovery of the secondary cell or beam failure recovery associated with the secondary cell, and may also be a beam failure recovery process performed on the secondary cell Then, the secondary cell can be deactivated.
  • Another implementation method of the above solution may also be:
  • the beam failure recovery process may be considered to be successfully completed; otherwise, if the beam failure recovery process is for beam failure recovery of the secondary cell or beam failure recovery associated with the secondary cell, and may also be The beam failure recovery process performed on the secondary cell can then deactivate the secondary cell.
  • the difference from the fourth embodiment is that the beam failure recovery timer beamfailurerecoverytimer is started in the fifth embodiment, and when the timer expires, the UE can deactivate the secondary cell.
  • the random access procedure is triggered. If the random access procedure is to recover a beam or a link failure on the secondary cell (preferably, when the serving cell that triggers the random access procedure is a secondary cell), the beam failure recovery timer beamfailurerecoverytimer is started;
  • the "cell corresponding to the beamfailurerecoverytimer" or the “secondary cell” refers to the cell that causes the beamfailurerecoverytimer to start, or the cell that has failed the beam failure recovery, or the beam failure recovery.
  • the cell that triggered the random access procedure It can be specifically designated as a secondary cell here.
  • Another implementation method of the above solution may also be:
  • the MAC entity sets BFI_COUNTER for each serving cell.
  • the MAC entity can set its own BFI_COUNTER for each serving cell that uses beamforming or for each serving cell that is allowed to use beam failure recovery.
  • BFI_COUNTER of a secondary cell If the value of BFI_COUNTER of a secondary cell is equal to beamFailureInstanceMaxCount+1, then the random access procedure is triggered and the timer beamfailurerecoverytimer is started;
  • the cell When the beamfailurerecoverytimer times out, the cell can be deactivated or the secondary cell can be activated.
  • the deactivating the secondary cell may also be that the UE considers/considers that the cell is in a deactivated state; or is (MAC layer) an upper layer (eg, RRC layer) indication and
  • the secondary cell has information related to the failure of the beam failure recovery; based on the indication/information, the upper layer of the UE (for example, the RRC layer) considers that the cell is in a deactivated state, or the upper layer of the UE (for example, an RRC layer) configures the lower layer (for example, a MAC The layer or PHY layer) considers the cell to be in a deactivated state.
  • embodiments of the present disclosure provide a method of operating on a UE, the method may include determining a random access procedure by using a preamble transmission counter COUNTER or a counter BFI_COUNTER related to a beam failure instance BFI. State; and depending on the state of the random access procedure, the secondary cell is activated based on one of the following:
  • the beam failure recovery process is beam failure recovery related to the secondary cell or beam failure on the secondary cell. Recovery process
  • determining, by using the preamble transmission counter COUNTER, the state of the random access procedure may include determining whether a preamble of the random access procedure is sent on the secondary cell when the value of the COUNTER is equal to the specific value And whether the random access procedure is triggered by beam failure recovery.
  • determining the state of the random access procedure by using the counter BFI_COUNTER related to the beam failure instance BFI may include triggering a random access procedure and determining random access when the value of BFI_COUNTER is equal to a specific value Whether the process is related to beam failure recovery on the secondary cell.
  • determining the state of the random access procedure by using the counter BFI_COUNTER related to the beam failure instance BFI may include triggering random access when the value of the BFI_COUNTER set by the MAC entity for the secondary cell is equal to a specific value. process.
  • Embodiment 6 will be described in detail below with reference to FIG.
  • the UE may also send information to the base station to indicate that the secondary cell has failed to recover from the beam failure, and after receiving the information, the base station may send an indication/message to the UE to deactivate the secondary cell. Or send an indication/message containing link/beam related configuration information to the UE.
  • the UE may send information indicating that the secondary cell's beam failure recovery has failed to the base station, where the information carries at least the cell ID of the secondary cell, and optionally, carries the measurement related Information.
  • One implementation manner of indicating to the base station that the beam failure recovery of the secondary cell fails is to use the MAC CE to notify the base station.
  • the UE may generate a MAC CE.
  • the MAC CE carries at least the sequence number or the identifier Cell ID of the secondary cell in which the beam failure recovery failure occurs. Specifically, if the beam failure recovery initiated on the secondary cell fails, or the random access procedure triggered by the beam failure recovery is not successfully completed, the Cell ID of the cell is reported on the MAC CE.
  • the UE may deactivate the secondary cell.
  • an embodiment of the present disclosure provides a method for operating on a UE, the method may include: transmitting, to a base station, information indicating that a secondary cell has failed to recover from a beam failure to indicate to the base station that the secondary cell fails to be a beam. Recovery fails; and an indication/message of deactivating the secondary cell is received from the base station and the secondary cell is deactivated.
  • transmitting, to the base station, information indicating that the secondary cell has failed to recover from the beam failure to indicate to the base station that the failure of the beam failure recovery of the secondary cell may include: when the failure of the beam failure recovery of the secondary cell fails, The MAC layer control information (MAC CE) is generated to indicate to the base station through the MAC CE that the beam failure recovery of the secondary cell has failed.
  • MAC CE MAC layer control information
  • the information indicating that the secondary cell generates a beam failure recovery failure may include an identifier Cell ID of the secondary cell, and optionally, may also include information related to the measurement.
  • the MAC CE may include an identifier Cell ID of the secondary cell in which the beam failure recovery failure occurs, and the method may further include: when the beam failure recovery of the secondary cell fails, on the MAC CE Report the Cell ID of the secondary cell.
  • the fifth embodiment or the sixth embodiment whether the UE deactivates the secondary cell or the UE activates the secondary cell after receiving the deactivated secondary cell message sent by the base station, It can include at least one or more of the following operations:
  • Stop the timer associated with the secondary cell for example, the secondary cell deactivation timer sCellDeactivationTimer, for example, a partial bandwidth inactivity timer bandwidthPartInactivityTimer, and, for example, a timer beamFailureDetectionTimer; the stop may be to stop the running timer, and the timing will be Set to the initial value;
  • the secondary cell deactivation timer sCellDeactivationTimer for example, a partial bandwidth inactivity timer bandwidthPartInactivityTimer, and, for example, a timer beamFailureDetectionTimer
  • uplink grant Type 1 Suspending any type 1 uplink grant (uplink grant Type 1) configured on the secondary cell;
  • the counter associated with the secondary cell such as BFI-COUNTER, is emptied, and the emptying may refer to setting the counter to an initial value.
  • Embodiment 8 will be described in detail below with reference to FIG.
  • the UE may determine that the beam failure recovery process has not completed successfully or failed, and the UE suspends detection of the beam failure and the recovery process or related Process and indicate to the upper layer information about beam failure recovery failure.
  • the detecting and recovering process of the pending beam failure may be that the MAC does not process the BFI indication reported by the physical layer PHY layer, for example, when the BFI indication arrives, the value of the BFI_COUNTER is not updated, or the detection timer beamFailureDetectionTimer is not started;
  • the suspension may also be that the MAC layer indicates that the lower layer (for example, the physical layer PHY) does not report the BFI indication;
  • the suspension may also be that the UE does not trigger the random access procedure, that is, when the value of the BFI_COUNTER reaches a certain value, if the UE is in the state of suspending the detection of the beam failure and the recovery process, the random access procedure is not triggered.
  • the random access procedure is triggered only when the value of BFI_COUNTER reaches a certain value and when the UE is not in the state of suspending detection of the beam failure and the recovery process.
  • Such a pending operation will continue until the MAC layer of the UE receives an indication from the upper layer (eg, the RRC layer). After the UE receives the indication of the upper layer, for example, instructing the UE to resume or start/restart the beam failure detection and recovery process, the UE may continue to perform the detection of the beam failure and the recovery process.
  • the upper layer eg, the RRC layer
  • the specific processing for continuing or starting or restarting the beam failure detection and recovery process may be: when the UE receives the indication, reset BFI_COUNTER to an initial value, and when receiving the BFI indication, start or restart the detection timer beamFailureDetectionTimer It may also be that the lower layer (physical layer) reports the BFI indication when the beam failure instance BFI is detected; or may trigger the random access procedure when the value of the BFI_COUNTER reaches a certain value.
  • a further implementation of the above-described continuation or activation or restart of the beam failure detection and recovery process can be as follows:
  • Step 1 When receiving the indication from the upper layer, the UE starts the detection of the beam failure and the recovery process.
  • the indication may be an indication of the display, and may also be an implicit indication, for example, when the UE receives parameter configuration information related to beam management or wave speed failure detection, or completes parameter configuration related to beam management or wave speed failure detection, In addition, when the UE is configured with the parameters related to the beam management or the detection of the failure of the wave speed, or when the upper layer of the UE generates the RRC reconfiguration complete message, and the new configuration is adopted, the UE may be considered to have received the detection of the beam failure.
  • An indication of the recovery process is an indication of the display, and may also be an implicit indication, for example, when the UE receives parameter configuration information related to beam management or wave speed failure detection, or completes parameter configuration related to beam management or wave speed failure detection, In addition, when the UE is configured with the parameters related to the beam management or the detection of the failure of the wave speed, or when the upper layer of the UE generates the R
  • Step 2 When the value of BFI_COUNTER reaches a certain value, the random access procedure is triggered;
  • Step 3 If the random access procedure triggered in step 2 is not successfully completed, it may be determined that the beam failure recovery fails, and the related information of the failure is indicated to the upper layer;
  • Step 4 The UE may actively perform the related operations described above (for example, regarding the suspended operation), or may be that the UE receives the upper layer indication to indicate the detection of the suspension failure and the recovery process, and then performs the foregoing.
  • this indication may be an indication of the display, and may also be an implicit indication, eg, the UE receives a reconfiguration message containing the target primary cell information, indicating the UE to the new When the cell synchronizes, it can be considered that the UE receives the indication of the pending detection of the beam failure and the recovery process.
  • Step 5 When the UE receives the upper layer indication to restart the detection and recovery process of the beam failure, performing the foregoing operations (for example, the above-mentioned operation of continuing or starting or restarting the beam failure detection and recovery process), And repeat the operation of step two.
  • the indications of step one and step five may be indication information in the same manner or method.
  • an embodiment of the present disclosure provides a method for operating on a UE, where the method may include determining that a beam failure recovery process fails when a random access procedure triggered by a beam failure recovery is not successfully completed. And suspend the detection of the beam failure and the beam failure recovery process; the upper layer indicates information related to the failure of the beam failure recovery process; and receives the corresponding indication from the upper layer to initiate the detection of the beam failure and the beam failure recovery process.
  • initiating the detection of the beam failure and the beam failure recovery process includes at least one of the following operations:
  • the random access procedure is triggered, and if the random access procedure is not successfully completed, it is determined that the beam failure recovery process fails and is indicated to the upper layer. Regarding the failed information, and receiving an indication from the upper layer to suspend the detection of the beam failure and the beam failure recovery process or initiate the detection of the beam failure and the beam failure recovery process.
  • the suspension may include at least one of the following operations: (1) not processing the BFI indication reported by the lower layer; (2) indicating that the lower layer does not report the BFI indication; or (3) not Trigger the random access process.
  • the upper layer may be based on a timer mechanism to indicate to the MAC layer to continue or initiate or restart the beam failure detection and recovery process. For example, when the upper layer receives an indication that the beam failure recovery fails, the timer is started, and if one or several synchronization signals indicated by the lower layer (here may refer to the physical layer) are received during the running of the timer, the timer is stopped. And the lower layer (here may refer to the MAC layer) indicates to continue the operation; and if the timer runs out, the upper layer can determine that a link failure has occurred and perform a link failure related operation, such as resetting the MAC layer.
  • a timer mechanism to indicate to the MAC layer to continue or initiate or restart the beam failure detection and recovery process. For example, when the upper layer receives an indication that the beam failure recovery fails, the timer is started, and if one or several synchronization signals indicated by the lower layer (here may refer to the physical layer) are received during the running of the timer, the timer is stopped. And
  • Embodiment 9 will be described in detail below with reference to FIG.
  • the UE 100 may include a memory 110 and a processor 120.
  • the memory 110 may store instructions or code for performing the operations described in any of the first to eighth embodiments.
  • Processor 120 can be configured to execute instructions or code stored in memory 110.
  • a UE includes a memory (eg, 110) that stores instructions and a processor (eg, 120) that is configured to execute instructions stored in memory to : using the preamble transmission counter COUNTER to count the number of transmissions of the preamble in the random access procedure; and when the value of the preamble transmission counter COUNTER indicates that the number of transmissions of the preamble reaches or exceeds a preset maximum number of transmissions, based on the following One of the items determines whether the upper layer of the UE (preferably, the upper layer may be the RRC layer of the UE) indicates a random access problem: (1) whether the preamble transmitted by the random access procedure corresponds to the reference signal of the secondary cell; or (2) Whether the random access channel timing adopted by the random access procedure corresponds to the reference signal of the secondary cell.
  • the upper layer of the UE preferably, the upper layer may be the RRC layer of the UE
  • a UE includes a memory (eg, 110) that stores instructions and a processor (eg, 120) that is configured to execute instructions stored in memory to : using a preamble transmission counter COUNTER or a counter BFI_COUNTER related to the beam failure instance BFI to determine the state of the random access procedure; and deactivating the secondary cell based on one of the following items according to the state of the random access procedure: (1) random access The preamble of the incoming procedure is sent on the secondary cell, and the random access procedure is triggered by beam failure recovery; (2) when the random access procedure is not successfully completed, the beam failure recovery process is not successfully completed, and The beam failure recovery process is a beam failure recovery process related to the secondary cell or a beam failure recovery process performed on the secondary cell; or (3) when a random access procedure and a beam failure recovery on the secondary cell When relevant, a beam failure recovery timer is initiated and the beam failure recovery timer expires.
  • a preamble transmission counter COUNTER or a counter BFI_COUNTER related to the beam
  • a UE includes a memory (eg, 110) that stores instructions and a processor (eg, 120) that is configured to execute instructions stored in memory to Transmitting, to the base station, information indicating that the secondary cell has failed to recover from the beam failure to indicate to the base station that the beam failure recovery of the secondary cell has failed; and receiving an indication/message of deactivating the secondary cell from the base station and deactivating the secondary cell.
  • a memory eg, 110
  • a processor eg, 120
  • a UE includes a memory (eg, 110) that stores instructions and a processor (eg, 120) that is configured to execute instructions stored in memory to
  • a memory eg, 110
  • a processor eg, 120
  • the upper layer indicates information related to the failure of the beam failure recovery process. And receiving corresponding indications from the upper layer to initiate detection of beam failures and beam failure recovery procedures.
  • the program running on the device according to the present invention may be a program that causes a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory system.
  • a program for realizing the functions of the embodiments of the present invention can be recorded on a computer readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called "computer system” herein may be a computer system embedded in the device, and may include an operating system or hardware (such as a peripheral device).
  • the "computer readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium of a short-term dynamic storage program, or any other recording medium readable by a computer.
  • circuitry e.g., monolithic or multi-chip integrated circuits.
  • Circuitry designed to perform the functions described in this specification can include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit.
  • One or more embodiments of the present invention may also be implemented using these new integrated circuit technologies in the context of new integrated circuit technologies that replace existing integrated circuits due to advances in semiconductor technology.
  • UE devices Fixed or non-mobile electronic devices installed indoors or outdoors can be used as UE devices or communication devices such as AV devices, kitchen devices, cleaning devices, air conditioners, office equipment, vending machines, and other home appliances.

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Abstract

本公开提供了一种在用户设备(UE)上运行的方法，所述方法包括：利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数；以及当所述前导码发送计数器COUNTER的值指示前导码的发送次数达到或超过预设的最大发送次数时，基于以下项之一确定是否向UE的上层指示随机接入问题：(1)随机接入过程发送的前导码是否与辅小区的参考信号对应；或者(2)随机接入过程采用的随机接入信道时机是否与辅小区的参考信号对应。

Description

在用户设备上运行的方法及用户设备 技术领域
本发明涉及无线通信技术领域，更具体地，涉及一种在用户设备(UE)上运行的方法及用户设备。
背景技术
随着移动通信的快速增长和技术的巨大进步，世界将走向一个完全互联互通的网络社会，即任何人或任何东西在任何时间和任何地方都可以获得信息和共享数据。预计到2020年，互联设备的数量将达到500亿部，其中仅有100亿部左右可能是手机和平板电脑，其它的则不是与人对话的机器，而是彼此对话的机器。因此，如何设计系统以更好地支持万物互联是一项需要深入研究的课题。
为此，在2016年3月举行的第三代合作伙伴计划(3GPP)RAN#64次全会上，提出了新5G无线接入技术的研究课题(参见非专利文献：RP-160671 New SID Proposal：Study on New Radio Access Technology)。在该工作项目的描述中，未来新的通信制式的工作频段可扩展至100GHz，同时将至少满足增强的移动宽带业务需求、海量物联网UE的通信需求，以及高可靠性要求的业务需求等，该项目研究工作将于2018年结束。
在该课题的研究中，计划使用波束(beam)/波束赋形(beam forming)来进行信息的传输，具体包括在使用高频进行通信的时候，为了应对高频信道衰落过快的特性，采用发射比较细的波束。但是，利用较细的波束来进行信息传输容易受到外界变化的影响，比如手机的旋转，其他物体的遮挡等等。
在采用波束赋形的传输场景下，一旦为UE数据/信息传输服务的有效波束信号变弱或者低于预配置的阈值，数据/信息的传输被中断，可以认为发生了波束传输失败(beam failure)。UE将向网络发送相关的请求信息(例如，波束传输失败恢复请求，beam failure recovery request)，请求重新配置，或者恢复有效的工作波束。这样的请求信息可以是特定的 前导码序列(preamble)。一旦基站在配置的随机接入的PRACH上收到该特定的preamble，那么基站就知道相应的UE发生了波束传输失败，并且知道该UE请求恢复；为了响应UE的请求，基站会在对应的下行波束方向上发送PDCCH，该PDCCH由该UE的C-RNTI加扰；在UE正确接收到该PDCCH时，认为恢复请求得到响应，整个波束传输失败恢复过程成功完成。
波束赋形可以与载波聚合(carrier aggregation)技术相结合使用。基站可以为UE配置多个载波，不同的载波可以对应不同的服务小区(serving cell)，其中至少包括一个主小区(primary Cell，Pcell)以及一个或若干个辅小区(Secondary cell，Scell)。主小区和辅小区都可以采用波束赋形技术，并且一旦发生了波束传输失败，则可以进行恢复。理论上，主辅小区可以采用完全相同的波束传输失败恢复过程。但是在实际应用中，存在一些问题：
主小区总是配置有PRACH资源，而辅小区不一定配置有PRACH资源。当辅小区没有配置PRACH资源时，一旦辅小区上发生波束传输失败，那么需要利用主小区的PRACH发送资源发送用于指示波束失败恢复请求的前导码，然后UE在辅小区上等待接收基站发送的响应。对于在主小区进行的随机接入过程，如果没有能够成功完成，例如，前导码的发送次数超过了最大允许的发送次数，则MAC层将向上层指示发生了随机接入问题，从而导致链路的释放与重建。但在这一过程中，主小区的链路性能极大可能是能够正常工作的，因此，误报随机接入问题导致不需要的链路释放与重建，进而导致资源的浪费，是需要解决的问题。
此外，在现有机制中，随机接入的触发是由计数器BFI_COUNTER的数值来决定的。存在一种情况，当BFI_COUNTER的数值等于特定值时，触发了第一次随机接入过程。当前执行的随机接入过程有可能失败，一旦这种情况的发生，意味UE在辅小区的链路出现了问题，无法恢复。而与此同时，BFI_COUNTER有可能重新计数，并再次等于特定值，从而再次触发随机接入过程，导致UE在一个已经出现链路问题的辅小区上继续发送随机接入。如何避免此类情况出现，也是需要解决的问题。
发明内容
本发明的各实施例是为了至少解决上述问题和/或缺点，并且至少提供以下描述的优点。
根据本公开的一个实施例，提供了一种在用户设备(UE)上运行的方法，所述方法可以包括：利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数；以及当所述前导码发送计数器COUNTER的值指示前导码的发送次数达到或超过预设的最大发送次数时，基于以下项之一确定是否向UE的上层指示随机接入问题：(1)随机接入过程发送的前导码是否与辅小区的参考信号对应；或者(2)随机接入过程采用的随机接入信道时机是否与辅小区的参考信号对应。
根据本公开的一个实施例，提供了一种在UE上运行的方法，所述方法可以包括：利用前导码发送计数器COUNTER或与波束失败实例BFI有关的计数器BFI_COUNTER来确定随机接入过程的状态；以及根据随机接入过程的状态，基于以下项之一去激活辅小区：(1)随机接入过程的前导码是在所述辅小区上发送的，并且随机接入过程是由波束失败恢复触发的；(2)当随机接入过程没有成功完成时，波束失败恢复过程没有成功完成，并且所述波束失败恢复过程是与所述辅小区相关的波束失败恢复或在所述辅小区上进行的波束失败恢复过程；或者(3)当随机接入过程与所述辅小区上的波束失败恢复有关时，启动波束失败恢复定时器，并且所述波束失败恢复定时器超时。
根据本公开的一个实施例，提供了一种在UE上运行的方法，所述方法可以包括：向基站发送指示辅小区发生波束失败恢复失败的信息以向基站指示辅小区的波束失败恢复发生了失败；以及从基站接收去激活辅小区的指示/消息并去激活辅小区。
根据本公开的一个实施例，提供了一种在UE上运行的方法，所述方法可以包括：当波束失败恢复触发的随机接入过程没有成功完成时，确定波束失败恢复过程发生失败，并挂起对波束失败的检测和波束失败恢复过程；向上层指示与波束失败恢复过程失败相关的信息；以及从上层接收相应指示以启动对波束失败的检测和波束失败恢复过程。
根据本公开的一个实施例，提供了一种UE，所述UE包括存储指令的存储器和处理器，所述处理器被配置为执行存储在存储器中的指令以：利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数；以及当所述前导码发送计数器COUNTER的值指示前导码的发送次数达到或超过预设的最大发送次数时，基于以下项之一确定是否向UE的上层(优选地，上层可以是UE的RRC层)指示随机接入问题：(1)随机接入过程发送的前导码是否与辅小区的参考信号对应；或者(2)随机接入过程采用的随机接入信道时机是否与辅小区的参考信号对应。
根据本公开的一个实施例，提供了一种UE，所述UE包括存储指令的存储器和处理器，所述处理器被配置为执行存储在存储器中的指令以：利用前导码发送计数器COUNTER或与波束失败实例BFI有关的计数器BFI_COUNTER来确定随机接入过程的状态；以及根据随机接入过程的状态，基于以下项之一去激活辅小区：(1)随机接入过程的前导码是在所述辅小区上发送的，并且随机接入过程是由波束失败恢复触发的；(2)当随机接入过程没有成功完成时，波束失败恢复过程没有成功完成，并且所述波束失败恢复过程是与所述辅小区相关的波束失败恢复或在所述辅小区上进行的波束失败恢复过程；或者(3)当随机接入过程与所述辅小区上的波束失败恢复有关时，启动波束失败恢复定时器，并且所述波束失败恢复定时器超时。
根据本公开的一个实施例，提供了一种UE，所述UE包括存储指令的存储器和处理器，所述处理器被配置为执行存储在存储器中的指令以：向基站发送指示辅小区发生波束失败恢复失败的信息以向基站指示辅小区的波束失败恢复发生了失败；以及从基站接收去激活辅小区的指示/消息并去激活辅小区。
根据本公开的一个实施例，提供了一种UE，所述UE包括存储指令的存储器和处理器，所述处理器被配置为执行存储在存储器中的指令以：当波束失败恢复触发的随机接入过程没有成功完成时，确定波束失败恢复过程发生失败，并挂起对波束失败的检测和波束失败恢复过程；向上层指示与波束失败恢复过程失败相关的信息；以及从上层接收相应指示以启动对波束失败的检测和波束失败恢复过程。
附图说明
根据结合附图的以下描述，本发明的某些实施例的上述和其他方面、特征和优点将更清楚，在附图中：
图1示出了根据本公开实施例的在UE上运行的方法的流程图；
图2示出了根据本公开另外实施例的在UE上运行的方法的流程图；
图3示出了根据本公开另外实施例的在UE上运行的方法的流程图；
图4示出了根据本公开另外实施例的在UE上运行的方法的流程图；
图5示出了根据本公开另外实施例的在UE上运行的方法的流程图；以及
图6示出了根据本公开实施例的UE的框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
在具体描述之前，先对本发明中提到的若干术语做如下说明。除非另有指出，本发明中涉及的术语都具有下文的含义。
UE        User Equipment用户设备
RLF       Radio Link Failure无线链路失败
NR        New Radio新一代无线技术
LTE       Long Term Evolution长期演进技术
eLTE      Enhaced Long Term Evolution增强的长期演进技术
RRC       Radio Resource Control无线资源控制(层)
MAC       Medium Access Control媒体接入控制(层)
PHY       physical layer物理层
PDCCH     Physical Downlink Control Channel物理下行控制信道
RA        Random Access随机接入
PRACH     Physical Random Access Channel物理随机接入信道
SSB      Synchronization Signal Block同步信号块
CSI-RS   Channel State Information Reference signal信道状态信息参考信号
MAC CE   MAC Control Element MAC层控制信息
RAR      Random Access Response随机接入响应
HARQ     Hybrid Automatic Repeat Quest混合自动重传请求
下文以NR移动通信系统及其后续的演进版本作为示例应用环境，并以支持NR的基站和UE设备为例，具体描述了根据本发明的多个实施方式。然而，需要指出的是，本发明不限于以下实施方式，而是可适用于更多其它的无线通信系统，例如eLTE通信系统，而且可以适用于其他基站和UE设备，例如支持eLTE的基站和UE设备。同时本发明不限于由于波束/波束赋形导致的无线链路中断的场景，还可以用于由于其它原因导致的无线链路中断场景。
在采用波束赋形的传输场景下，一旦为UE预配置的检测信号变弱或者低于预配置的阈值，UE的物理层会向MAC层指示，这类指示被称为波束失败实例(beam failure instance，BFI)；
在MAC层，UE利用与BFI有关的计数器BFI_COUNTER来统计接收到的指示的个数；
每接收到一个指示，就将启动或者重新启动与波束失败检测有关的检测定时器beamFailureDetectionTimer，并将BFI_COUNTER的值加1；
当BFI_COUNTER的值等于(或者超过)特定值时，例如BFI_COUNTER的值等于最大预先的BFI的个数加一(beamFailureInstanceMaxCount+1)，那么MAC层会触发随机接入过程，即UE会发送前导码，请求恢复波束失败或者请求链路重配置；
当检测定时器beamFailureDetectionTimer超时的时候，UE将BFI_COUNTER置为初始值(例如，BFI_COUNTER的初始值可以为零)。
在进行被触发的随机接入的过程中，有一个前导码发送计数器(preamble transmission COUNTER，以下简称COUNTER)，用来统计在随机接入过程中前导码的发送次数。在随机接入过程中与COUNTER相 关的具体过程可以包括：
步骤一：启动COUNTER，具体地，当随机接入过程被初始化/触发时，设置COUNTER的值为一；
步骤二：统计在随机接入过程中前导码的发送次数，具体地，当UE在一个时间窗内没有接收到给UE的响应时，以及当竞争冲突解决没有成功时(例如，竞争冲突解决定时器超时时)，将COUNTER的值加一；
步骤三：判断COUNTER的值是否等于特定值，例如特定值可以等于前导码的最大允许发送次数加一。
-如果COUNTER的值不等于最大发送次数加一，那么UE可以继续发送前导码，以及还可以继续执行步骤二；
-如果COUNTER的值等于最大发送次数加一，那么MAC会向UE的上层(upper layer)指示发生了随机接入问题(Random Access Problem)或者向UE的上层指示发生了问题，该问题是一个随机接入问题，这里以及下文中统称为指示随机接入问题。上层接收到该指示后，可以判定发生了无线链路失败，然后可以触发RRC连接重建立过程。
这里判断COUNTER的值是否等于最大发送次数加一，等价于判断COUNTER的值是否超过(大于)预定的最大发送次数。如果COUNTER的初始值为零，那么这里的判断可以是判断COUNTER的值是否等于预定的最大发送次数。
以下，参照附图详细描述本发明的若干实施例。
为了解决随机接入问题误报的问题，可以采用实施例一、实施例二和/或实施例三中所述的解决方法。
下面将参考图1对实施例一进行详细描述。
实施例一
当COUNTER的值等于最大发送次数加一时，UE根据随机接入过程发送的前导码是否与辅小区上的参考信号对应或者关联，来判断是否需要向上层指示发生了随机接入问题。其中，优选地，参考信号可以是 基站在辅小区上发送的SSB或者CSI-RS信号。
具体地，该实施例的解决方案可以如下所述：
当COUNTER的值等于最大发送次数加一时：
-如果当前的随机接入过程发送的前导码并非与辅小区的参考信号对应或者关联，则UE，优选地，可以是UE的MAC层，向上层(upper layer)报告或者指示随机接入问题。这里的上层可以是UE的RRC层；
-如果当前的随机接入过程发送的前导码与辅小区的参考信号对应或者关联，那么UE，优选地，可以是UE的MAC层，不向上层报告或者指示随机接入问题，以及可选地，可以向上层报告或者指示波束失败恢复失败(beam failure recovery failure)。这里的上层可以是UE的RRC层。以及可选地，UE判断当前随机接入过程失败或者没有成功完成。
上述前导码与辅小区的参考信号对应或者关联，是指前导码与在辅小区发送的参考信号之间存在着对应关系或者关联，具体地可以是，第一前导码表示或者对应基站在辅小区发送的第一参考信号，特别地，可以是前导码对应着第一参考信号的波束方向。可以理解为，当基站接收到UE发送的第一前导码时，可以知道UE在基站发送第一参考信号的方向上测得的信号质量满足测量要求。
下面将参考图2对实施例二进行详细描述。
实施例二
与实施例一的区别在于可以根据随机接入资源来判断是否需要向上层指示发生了随机接入问题，例如随机接入信道时机(PRACH occasion)与辅小区的参考信号可以存在对应关系或者关联。PRACH信道可以由时间和频率来表示，PRACH occasion可以理解为特定时间上的PRACH或者特定频率上的PRACH，或者还可以是载波或者子载波上的PRACH。PRACH occasion与辅小区参考信号的对应或者关联可以是指某个时刻/频率/载波上的随机接入信道对应或者关联于辅小区发送的某个参考信号或者发送该参考信号的波束方向。
因此，实施例一可以演变为：
当COUNTER的值等于最大发送次数加一时，UE根据随机接入过程选择的或者采用的PRACH occasion是否与辅小区上的参考信号对应或者关联，来判断是否需要向上层指示发生了随机接入问题。
具体地，实施例二的解决方案可以如下所述：
当COUNTER的值等于最大发送次数加一时：
-如果当前的随机接入过程选择的或者采用的PRACH occasion并非与辅小区的参考信号对应或者关联，则UE，优选地，可以是UE的MAC层，向上层报告或者指示随机接入问题。这里的上层可以是UE的RRC层；
-如果当前的随机接入过程选择的或者采用的PRACH occasion与辅小区的参考信号对应或者关联，那么UE，优选地，可以是UE的MAC层，不向上层报告或者指示随机接入问题，以及可选地，可以向上层报告或者指示波束失败恢复失败。这里的上层可以是UE的RRC层。以及可选地，UE判断当前随机接入过程失败或者没有成功完成。
上述PRACH occasion与辅小区的参考信号对应是指PRACH occasion与在辅小区发送的参考信号之间存在着对应关系或者关联，具体地可以是，第一PRACH occasion表示或对应(或者关联于)基站在辅小区发送的第一参考信号，特别地，可以对应发送第一参信号的波束方向。可以理解为，当基站在第一PRACH occasion上接收到UE发送的前导码时，可以知道UE在基站发送第一参考信号的方向上测得的信号质量满足测量要求。
实施例三
UE在发送前导码之后，在服务小区上监听PDCCH，这个服务小区是指涉及波束失败(beam failure)的服务小区，即发生波束失败或者发生波束失败恢复(beam failure recovery)的服务小区。
如果在RAR响应时间窗超时的时候，在该涉及波束失败的服务小区上还没有正确接收到寻址到C-RNTI的PDCCH，那么UE可以认为随 机接入响应接收失败，将COUNTER的值加一。
如果COUNTER的值等于最大发送次数加一，则可以执行实施例一或实施例二的操作。
因此，如上所述，本公开的实施例提供了一种在用户设备(UE)(优选地，可以是UE的MAC层)上运行的方法，所述方法可以包括：利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数；以及当所述前导码发送计数器COUNTER的值指示前导码的发送次数达到或超过预设的最大发送次数时，基于以下项之一确定是否向UE的上层(优选地，上层可以是UE的RRC层)指示随机接入问题：
(1)随机接入过程发送的前导码是否与辅小区的参考信号对应；或者
(2)随机接入过程采用的随机接入信道时机是否与辅小区的参考信号对应。
在本公开的一个实施例中，当随机接入过程发送的前导码与辅小区的参考信号不对应时，向UE的上层指示随机接入问题；以及当随机接入过程发送的前导码与辅小区的参考信号对应时，不向上层指示随机接入问题。
在本公开的一个实施例中，所述参考信号可以是基站在辅小区上发送的SSB或CSI-RS信号。
在本公开的一个实施例中，当随机接入过程采用的随机接入信道时机与辅小区的参考信号不对应时，向UE的上层指示随机接入问题；以及当随机接入过程采用的随机接入信道时机与辅小区的参考信号对应时，不向UE的上层指示随机接入问题。
在本公开的一个实施例中，所述方法还可以包括：在发生波束失败恢复的服务小区上监听物理下行控制信道(PDCCH)，其中，利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数包括：当随机接入响应时间窗超时时，如果在发生波束失败恢复的服务小区上未接收到寻址到小区无线网络临时标识(C-RNTI)的PDCCH，则确定随机接入响应接收失败，并且所述前导码发送计数器COUNTER的值加 一。
为了避免UE在辅小区上执行的由于波束失败恢复触发的随机接入过程失败后，再次触发随机接入过程，可以采用实施例四至实施例八中所述的解决办法。
下面参考图3对实施例四和实施例五进行详细描述。
实施例四
当COUNTER的值等于特定值时，例如preambleTxMax+1，如果随机接入的前导码是在辅小区上发送的，那么认为随机接入过程没有成功完成(或者认为随机接入过程失败)，并且，又如果该随机接入过程是由波束失败恢复触发的，那么，可以去激活该辅小区。
具体描述可以如下：
当COUNTER的值等于特定值时，如果随机接入的前导码是在辅小区上发送的，并且又如果该随机接入过程是由波束失败恢复触发的，那么，可以去激活该辅小区。
上述解决方法的又一实现方法可以是：
如果随机接入过程没有成功完成，那么可以认为波束失败恢复过程没有成功完成。当波束失败恢复过程没有成功完成时，如果所述波束失败恢复过程是为了辅小区的波束失败恢复或者是和辅小区相关的波束失败恢复，以及还可以是在辅小区上进行的波束失败恢复过程，那么可以去激活该辅小区。
上述解决方法的又一实现方法还可以是：
如果随机接入过程成功完成，那么可以认为波束失败恢复过程成功完成；否则，如果所述波束失败恢复过程是为了辅小区的波束失败恢复或者是和辅小区相关的波束失败恢复，以及还可以是在辅小区上进行的波束失败恢复过程，那么可以去激活该辅小区。
实施例五
和实施例四的区别在于，在实施例五中启动波束失败恢复定时器beamfailurerecoverytimer，当该定时器超时时，UE可以去激活辅小区。
具体实现可以如下：
当BFI_COUNTER的值等于beamFailureInstanceMaxCount+1时，触发随机接入过程。如果该随机接入过程是为了恢复辅小区上的波束或者链路失败(优选地，可以描述为当触发随机接入过程的服务小区是辅小区时)，则启动波束失败恢复定时器beamfailurerecoverytimer；
当beamfailurerecoverytimer超时的时候，可以去激活beamfailurerecoverytimer对应的小区，或者去激活该辅小区。
所述的“beamfailurerecoverytimer对应的小区”或者“该辅小区”是指导致该beamfailurerecoverytimer启动的小区，又或者是指发生了波束失败需要进行恢复(beam failure recovery)的小区，还可以是由于波束失败恢复触发了随机接入过程的小区。这里可以特别指定为辅小区。
上述解决方法的又一实现方法还可以是：
MAC实体为每个服务小区都设置了BFI_COUNTER，特别的，MAC实体可以为每一个采用了波束赋形的服务小区或者为每一个允许使用波束失败恢复的服务小区都设置各自的BFI_COUNTER。
如果一个辅小区的BFI_COUNTER的值等于beamFailureInstanceMaxCount+1，那么触发随机接入过程，并启动定时器beamfailurerecoverytimer；以及
当beamfailurerecoverytimer超时的时候，可以去激活该小区，或者去激活该辅小区。
在本文中，所述的去激活该辅小区，还可以是UE认为/判定(consider)该小区处于去激活态(deactivated state)；又或者是(MAC层)向上层(例如RRC层)指示与辅小区发生了波束失败恢复失败相关的信息；基于该指示/信息，UE的上层(例如RRC层)认为该小区处于去激活态，或者是UE的上层(例如RRC层)配置下层(例如，MAC层或者PHY层)认为该小区处于去激活态。
因此，如上所述，本公开的实施例提供了一种在UE上运行的方法，所述方法可以包括：利用前导码发送计数器COUNTER或与波束失败实 例BFI有关的计数器BFI_COUNTER来确定随机接入过程的状态；以及根据随机接入过程的状态，基于以下项之一去激活辅小区：
(1)随机接入过程的前导码是在所述辅小区上发送的，并且随机接入过程是由波束失败恢复触发的；
(2)当随机接入过程没有成功完成时，波束失败恢复过程没有成功完成，并且所述波束失败恢复过程是与所述辅小区相关的波束失败恢复或在所述辅小区上进行的波束失败恢复过程；或者
(3)当随机接入过程与所述辅小区上的波束失败恢复有关时，启动波束失败恢复定时器，并且所述波束失败恢复定时器超时。
在本公开的一个实施例中，利用前导码发送计数器COUNTER来确定随机接入过程的状态可以包括：当COUNTER的值等于特定值时，确定随机接入过程的前导码是否是在辅小区上发送的以及随机接入过程是否是由波束失败恢复触发的。
在本公开的一个实施例中，利用与波束失败实例BFI有关的计数器BFI_COUNTER来确定随机接入过程的状态可以包括：当BFI_COUNTER的值等于特定值时，触发随机接入过程，并确定随机接入过程是否与辅小区上的波束失败恢复有关。
在本公开的一个实施例中，利用与波束失败实例BFI有关的计数器BFI_COUNTER来确定随机接入过程的状态可以包括：当MAC实体为辅小区设置的BFI_COUNTER的值等于特定值时，触发随机接入过程。
下面参考图4对实施例六进行详细描述。
实施例六
和实施例四/五的区别在于，UE还可以向基站发送信息，指示辅小区发生了波束失败恢复失败，并且基站在接收到该信息后，可以向UE发送去激活该辅小区的指示/消息，或者向UE发送包含链路/波束相关的配置信息的指示/消息。
为了通知基站辅小区的波束失败恢复发生了失败，UE可以向基站发送指示辅小区的波束失败恢复发生失败的信息，其中该信息至少携带辅小区的小区ID，以及可选地，携带与测量相关的信息。
向基站指示辅小区的波束失败恢复发生失败的一种实现方式是采用MAC CE来通知基站。
当波束失败恢复发生失败，或者波束失败恢复触发的随机接入过程没有成功完成时，UE可以生成一个MAC CE。在该MAC CE中至少携带发生波束失败恢复失败的辅小区的序号或标识Cell ID。具体地，如果在该辅小区上启动的波束失败恢复发生了失败，或者波束失败恢复触发的随机接入过程没有成功完成，则在MAC CE上报告该小区的Cell ID。
此外，在生成该MAC CE的时候，UE可以去激活该辅小区。
因此，如上所述，本公开的实施例提供了一种在UE上运行的方法，所述方法可以包括：向基站发送指示辅小区发生波束失败恢复失败的信息以向基站指示辅小区的波束失败恢复发生了失败；以及从基站接收去激活辅小区的指示/消息并去激活辅小区。
在本公开的一个实施例中，向基站发送指示辅小区发生波束失败恢复失败的信息以向基站指示辅小区的波束失败恢复发生了失败可以包括：当辅小区的波束失败恢复发生了失败时，生成MAC层控制信息(MAC CE)以通过MAC CE向基站指示辅小区的波束失败恢复发生了失败。
在本公开的一个实施例中，指示辅小区发生波束失败恢复失败的信息可以包括所述辅小区的标识Cell ID，以及可选地，还可以包括与测量相关的信息。
在本公开的一个实施例中，MAC CE可以包括发生波束失败恢复失败的辅小区的标识Cell ID，并且所述方法还可以包括：当辅小区的波束失败恢复发生了失败时，在MAC CE上报告该辅小区的Cell ID。
实施例七
关于在实施例四、实施例五或实施例六中所述的去激活辅小区，无论是UE去激活辅小区，还是UE在收到基站发送的去激活辅小区消息后去激活辅小区，都可以至少包括以下操作中的一项或者多项：
停止与该辅小区相关的定时器，例如辅小区去激活定时器sCellDeactivationTimer，又例如部分带宽无活动定时器 bandwidthPartInactivityTimer，又例如检测定时器beamFailureDetectionTimer；所述停止可以是停止正在运行的定时器，将定时器设置为初始值；
清除在该辅小区上配置的任何下行指派以及任何2类上行授权(uplink grantType 2)；
挂起(suspend)在该辅小区上配置的任何1类上行授权(uplink grant Type 1)；
清空所有与该辅小区关联的HARQ的缓存；以及
清空与该辅小区相关的计数器，例如BFI-COUNTER，所述清空可以是指将计数器设置为初始值。
下面参考图5对实施例八进行详细描述。
实施例八
当波束失败恢复触发的随机接入过程没有成功完成或者发生失败时，UE可以判定波束失败恢复过程没有成功完成或者发生失败，并且UE挂起(suspend)对波束失败的检测以及恢复过程或者相关的过程，并向上层指示关于波束失败恢复失败的信息。
所述的挂起对波束失败的检测以及恢复过程可以是MAC不再处理物理层PHY层上报的BFI指示，例如，当BFI指示到达时，不更新BFI_COUNTER的值，或者不启动检测定时器beamFailureDetectionTimer；
所述挂起还可以是MAC层指示下层(例如，物理层PHY)不要上报BFI指示；
所述挂起还可以是UE不触发随机接入过程，即，当BFI_COUNTER的值达到特定值时，如果UE正处于挂起对波束失败的检测以及恢复过程的状态时，不触发随机接入过程；换句话说，只有当BFI_COUNTER的值达到特定值时并且当UE没有处于挂起对波束失败的检测以及恢复过程的状态时，才触发随机接入过程。
这样一个挂起的操作将持续到UE的MAC层接收到来自上层(例如，RRC层)的指示后结束。当UE接收到上层的指示后，例如指示UE继续(resume)或者启动或重启动(start/restart)波束失败检测和恢 复过程，UE可以继续执行对波束失败的检测以及恢复过程。关于继续或者启动或重启动波束失败检测和恢复过程的具体处理可以是：当UE接收到该指示后，将BFI_COUNTER重置为初始值，以及当接收到BFI指示时，启动或者重启检测定时器beamFailureDetectionTimer；还可以是指示下层(物理层)在检测到波束失败实例BFI时上报BFI指示；还可以是当BFI_COUNTER的值达到特定值时触发随机接入过程。
上述继续或者启动或重启动波束失败检测和恢复过程的又一实现方法可以如下所述：
步骤一：UE在接收到来自上层的指示时，启动对波束失败的检测以及恢复过程。这个指示可以是显示的指示，还可以是隐式的指示，例如，当UE接收到与波束管理或者波速失败检测相关的参数配置信息时，或者完成与波束管理或者波速失败检测相关的参数配置，又或者UE被配置了与波束管理或者波速失败检测相关的参数时，又或者UE上层生成了RRC重配置完成消息，以及采用新的配置时，即可以认为UE接收到了启动对波束失败的检测以及恢复过程的指示；
步骤二：当BFI_COUNTER的值达到特定值时，触发随机接入过程；
步骤三：如果步骤二中触发的随机接入过程没有成功完成，那么可以判定波束失败恢复发生失败，并向上层指示失败的相关信息；以及
步骤四：UE可以主动执行前文所述的相关操作(例如，关于挂起的操作)，还可以是UE接收到上层指示，以指示挂起对波束失败的检测以及恢复过程，则执行前文所述的相关操作(例如，关于挂起的操作)；这个指示可以是显示的指示，还可以是隐式的指示，例如，UE收到了包含目标主小区信息的重配置的消息，指示UE到新的小区进行同步，那么可以认为UE接收到了挂起对波束失败的检测以及恢复过程的指示。
步骤五：当UE接收到上层指示，以重启动对波束失败的检测和恢复过程时，执行前文所述的相关操作(例如，上述继续或者启动或重启动波束失败检测和恢复过程的操作)，并重复执行步骤二的操作。
其中步骤一和步骤五的指示可以是采用相同方式或者方法的指示信息。
因此，如上所述，本公开的实施例提供了一种在UE上运行的方法，所述方法可以包括：当波束失败恢复触发的随机接入过程没有成功完成时，确定波束失败恢复过程发生失败，并挂起对波束失败的检测和波束失败恢复过程；向上层指示与波束失败恢复过程失败相关的信息；以及从上层接收相应指示以启动对波束失败的检测和波束失败恢复过程。
在本公开的一个实施例中，启动对波束失败的检测和波束失败恢复过程包括以下操作中的至少一项：
(1)将与波束失败实例BFI有关的计数器BFI_COUNTER重置为初始值，并且在接收到BFI指示时，启动与波束失败检测有关的检测定时器；
(2)指示下层在检测到BFI时上报BFI指示；
(3)当与波束失败实例BFI有关的计数器BFI_COUNTER的值达到特定值时，触发所述随机接入过程；或者
(4)当与波束失败实例BFI有关的计数器BFI_COUNTER的值达到特定值时，触发所述随机接入过程，如果所述随机接入过程没有成功完成，则确定波束失败恢复过程失败并向上层指示关于所述失败的信息，并从上层接收指示，以挂起对波束失败的检测和波束失败恢复过程或者启动对波束失败的检测和波束失败恢复过程。
在本公开的一个实施例中，所述挂起可以包括以下操作中的至少一项：(1)不对下层上报的BFI指示进行处理；(2)指示下层不上报BFI指示；或者(3)不触发随机接入过程。
在上述实现中，上层可以是基于定时器机制来向MAC层指示继续或者启动或重启动波束失败检测和恢复过程。例如，当上层接收到波束失败恢复失败的指示时，启动定时器，并且如果在定时器运行期间，接收到下层(这里可以是指物理层)指示的一个或者若干个同步信号，那么停止定时器，并向下层(这里可以是指MAC层)指示继续操作；而如果定时器运行超时，那么上层可以判定发生了链路失败，并执行链路失败相关的操作，例如重置MAC层等。
下面参考图6对实施例九进行详细描述。
实施例九
如图6所示，根据本发明实施例的UE 100可以包括存储器110和处理器120。存储器110可以存储用于执行根据实施例一至实施例八中的任何一个所描述的操作的指令或代码。处理器120可以被配置为执行存储在存储器110中的指令或代码。
根据本公开的一个实施例，提供了一种UE，该UE包括存储指令的存储器(例如，110)和处理器(例如，120)，所述处理器被配置为执行存储在存储器中的指令以：利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数；以及当所述前导码发送计数器COUNTER的值指示前导码的发送次数达到或超过预设的最大发送次数时，基于以下项之一确定是否向UE的上层(优选地，上层可以是UE的RRC层)指示随机接入问题：(1)随机接入过程发送的前导码是否与辅小区的参考信号对应；或者(2)随机接入过程采用的随机接入信道时机是否与辅小区的参考信号对应。
根据本公开的一个实施例，提供了一种UE，该UE包括存储指令的存储器(例如，110)和处理器(例如，120)，所述处理器被配置为执行存储在存储器中的指令以：利用前导码发送计数器COUNTER或与波束失败实例BFI有关的计数器BFI_COUNTER来确定随机接入过程的状态；以及根据随机接入过程的状态，基于以下项之一去激活辅小区：(1)随机接入过程的前导码是在所述辅小区上发送的，并且随机接入过程是由波束失败恢复触发的；(2)当随机接入过程没有成功完成时，波束失败恢复过程没有成功完成，并且所述波束失败恢复过程是与所述辅小区相关的波束失败恢复或在所述辅小区上进行的波束失败恢复过程；或者(3)当随机接入过程与所述辅小区上的波束失败恢复有关时，启动波束失败恢复定时器，并且所述波束失败恢复定时器超时。
根据本公开的一个实施例，提供了一种UE，该UE包括存储指令的存储器(例如，110)和处理器(例如，120)，所述处理器被配置为执行存储在存储器中的指令以：向基站发送指示辅小区发生波束失败恢复 失败的信息以向基站指示辅小区的波束失败恢复发生了失败；以及从基站接收去激活辅小区的指示/消息并去激活辅小区。
根据本公开的一个实施例，提供了一种UE，该UE包括存储指令的存储器(例如，110)和处理器(例如，120)，所述处理器被配置为执行存储在存储器中的指令以：当波束失败恢复触发的随机接入过程没有成功完成时，确定波束失败恢复过程发生失败，并挂起对波束失败的检测和波束失败恢复过程；向上层指示与波束失败恢复过程失败相关的信息；以及从上层接收相应指示以启动对波束失败的检测和波束失败恢复过程。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况 下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作UE设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种在用户设备UE上运行的方法，所述方法包括：
    利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数；以及
    当所述前导码发送计数器COUNTER的值指示前导码的发送次数达到或超过预设的最大发送次数时，基于以下项之一确定是否向UE的上层指示随机接入问题：
    (1)随机接入过程发送的前导码是否与辅小区的参考信号对应；或者
    (2)随机接入过程采用的随机接入信道时机是否与辅小区的参考信号对应。
  2. 根据权利要求1所述的方法，还包括：
    当随机接入过程发送的前导码与辅小区的参考信号不对应时，向UE的上层指示随机接入问题；以及
    当随机接入过程发送的前导码与辅小区的参考信号对应时，不向上层指示随机接入问题。
  3. 根据权利要求1所述的方法，还包括：
    当随机接入过程采用的随机接入信道时机与辅小区的参考信号不对应时，向UE的上层指示随机接入问题；以及
    当随机接入过程采用的随机接入信道时机与辅小区的参考信号对应时，不向UE的上层指示随机接入问题。
  4. 根据权利要求1所述的方法，还包括：在发生波束失败恢复的服务小区上监听物理下行控制信道PDCCH，
    其中，利用前导码发送计数器COUNTER统计在随机接入过程中前导码的发送次数包括：
    当随机接入响应时间窗超时时，如果在发生波束失败恢复的服务小区上未接收到寻址到小区无线网络临时标识C-RNTI的PDCCH，则确定随机接入响应接收失败，并且所述前导码发送计数器COUNTER的值加一。
  5. 一种在用户设备UE上运行的方法，所述方法包括：
    利用前导码发送计数器COUNTER或与波束失败实例BFI有关的计数器BFI_COUNTER来确定随机接入过程的状态；以及
    根据随机接入过程的状态，基于以下项之一去激活辅小区：
    (1)随机接入过程的前导码是在所述辅小区上发送的，并且随机接入过程是由波束失败恢复触发的；
    (2)当随机接入过程没有成功完成时，波束失败恢复过程没有成功完成，并且所述波束失败恢复过程是与所述辅小区相关的波束失败恢复或在所述辅小区上进行的波束失败恢复过程；或者
    (3)当随机接入过程与所述辅小区上的波束失败恢复有关时，启动波束失败恢复定时器，并且所述波束失败恢复定时器超时。
  6. 一种在用户设备UE上运行的方法，所述方法包括：
    向基站发送指示辅小区发生波束失败恢复失败的信息以向基站指示辅小区的波束失败恢复发生了失败；以及
    从基站接收去激活辅小区的指示/消息并去激活辅小区。
  7. 根据权利要求6所述的方法，其中，向基站发送指示辅小区发生波束失败恢复失败的信息以向基站指示辅小区的波束失败恢复发生了失败包括：
    当辅小区的波束失败恢复发生了失败时，生成MAC层控制信息MAC CE以通过MAC CE向基站指示辅小区的波束失败恢复发生了失败。
  8. 根据权利要求5或6所述的方法，其中，去激活辅小区包括以下操作中的至少一项：
    停止与所述辅小区相关的定时器；
    清除在所述辅小区上配置的任何下行指派和任何2类上行授权；
    挂起在所述辅小区上配置的任何1类上行授权：
    清空所有与所述辅小区关联的混合自动重传请求HARQ的缓存；以及
    清空与所述辅小区相关的计数器。
  9. 一种在用户设备UE上运行的方法，所述方法包括：
    当波束失败恢复触发的随机接入过程没有成功完成时，确定波束失 败恢复过程发生失败，并挂起对波束失败的检测和波束失败恢复过程；
    向上层指示与波束失败恢复过程失败相关的信息；以及
    从上层接收相应指示以启动对波束失败的检测和波束失败恢复过程。
  10. 根据权利要求9所述的方法，其中，启动对波束失败的检测和波束失败恢复过程包括以下操作中的至少一项：
    (1)将与波束失败实例BFI有关的计数器BFI_COUNTER重置为初始值，并且在接收到BFI指示时，启动与波束失败检测有关的检测定时器；
    (2)指示下层在检测到BFI时上报BFI指示；
    (3)当与波束失败实例BFI有关的计数器BFI_COUNTER的值达到特定值时，触发所述随机接入过程；或者
    (4)当与波束失败实例BFI有关的计数器BFI_COUNTER的值达到特定值时，触发所述随机接入过程，如果所述随机接入过程没有成功完成，则确定波束失败恢复过程失败并向上层指示关于所述失败的信息，并从上层接收指示，以挂起对波束失败的检测和波束失败恢复过程或者启动对波束失败的检测和波束失败恢复过程。
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