WO2020207333A1 - 链路失败恢复的方法和装置 - Google Patents

链路失败恢复的方法和装置 Download PDF

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Publication number
WO2020207333A1
WO2020207333A1 PCT/CN2020/083104 CN2020083104W WO2020207333A1 WO 2020207333 A1 WO2020207333 A1 WO 2020207333A1 CN 2020083104 W CN2020083104 W CN 2020083104W WO 2020207333 A1 WO2020207333 A1 WO 2020207333A1
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Prior art keywords
cells
cell
information
request message
reference signal
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PCT/CN2020/083104
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English (en)
French (fr)
Inventor
张荻
刘鹍鹏
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华为技术有限公司
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Priority to EP20787533.7A priority Critical patent/EP3944664A4/en
Publication of WO2020207333A1 publication Critical patent/WO2020207333A1/zh
Priority to US17/449,384 priority patent/US20220022274A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/305—Handover due to radio link failure
    • 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
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • This application relates to the communication field, and more specifically, to a method and device for link failure recovery in the communication field.
  • the terminal device In the communication process between the terminal device and the network device, the terminal device needs to detect the available beam, and transmit the information of the available beam to the network device to establish a link connection.
  • a terminal device detects a link failure (beam failure)
  • BFRQ beam failure recovery request message
  • BFRQ beam failure recovery request message
  • the beam information is reported to the network device, and the network device sends a beam failure recovery response (BFRR) message to the terminal device to indicate the new link information of the terminal device so that the terminal device can establish a new link connection with the network device To restore the link.
  • BFRR beam failure recovery response
  • the terminal device cannot determine a new link or cannot find an available beam, it will cause a link failure recovery failure, which will interrupt the link communication and reduce the communication efficiency.
  • the present application provides a method and device for link failure recovery, which can increase the probability of link failure recovery, reduce link failure recovery time delay, and improve link failure recovery reliability.
  • a method for link failure recovery including: determining that M first cells in which link failures occur are in a first state, where the first state is each of the M first cells The cell does not have the status of the first reference signal that meets the first preset condition, M ⁇ 1, and M is an integer; the first request message is sent on the first resource, and the first request message is used to indicate the M first Cell information of the cell; receiving the response message of the first request message on the second resource, the response message of the first request message is used to indicate the resource set of the second reference signal, and the resource set of the second reference signal includes N The resources used to recover the second reference signal of the M first cells, N ⁇ 1, and N is an integer; the resource set of the second reference signal is determined according to the response message of the first request message.
  • the terminal device detects the current link and determines that the link failures occur in the L first cells, including the first cell that recognizes the new link and the M first cell that does not recognize the new link.
  • Cells in other words, each of the M first cells has no new link, where L ⁇ M ⁇ 1, and L and M are integers. That is, the first request information in this application is used to indicate that each of the M first cells that failed the link has not identified a new link.
  • the first state refers to a state in which each of the M first cells does not recognize a new link.
  • the resources of the N second reference signals may be used to restore the links of all M cells, or may be used to restore the links of some of the M cells, which is not limited in this application.
  • the first is when for the first cell with a new link, the first request message indicates the situation of the new link, and the response information of the first request message is the information sent on the third resource according to the new link (can Is the PDCCH sent using the new link).
  • the second type is when for the first cell without a new link, the response message of the first request message may indicate aperiodic/periodic/half-periodic reference signal resource set (second reference signal resource set), etc., or
  • the response message of the first request message is associated with a certain default reference signal resource set (for example, a reference signal resource set used for beam management BM, or a reference signal resource set used for RRM measurement, or a certain set of multiplexed other functions. Reference signal resource sets).
  • the reference signal resource set used for beam management (BM) may be a reference signal resource set with a repetition identifier of "off” (it may also be a reference signal resource set with a repetition identifier of "on").
  • the response message of the first request message mainly refers to the second type.
  • the response message of the first request message is used to indicate the resource set of the second reference signal, and it may be that the response message of the first request message indicates the resource set of the second reference signal.
  • the response message of the first request message is configured to be associated with a certain reference signal resource set through high-layer signaling. It may also be that the response message of the first request message implicitly indicates the resource set of the second reference signal.
  • the response message of the first request message is associated with a certain reference signal resource set by default.
  • the reference signal resource set may be a reference signal resource set used for beam management BM, may also be a reference signal resource set used for RRM measurement, or a certain reference signal resource set multiplexed with other functions.
  • the default reference signal resource set may be a reference signal resource set multiplexing other functions, or may also be a reference signal resource set predefined by the protocol.
  • the second reference signal corresponding to the resource set of the second reference signal may be a CSI-RS, a TRS, or an SSB.
  • the terminal device reports information of some second reference signals in the resource set of the second reference signal on the uplink resource (which may be the PUSCH) indicated by the response message of the first request message.
  • the first request message may be sent through one or more request messages, which is not limited in this embodiment.
  • the first request message may be a link failure request message (BFRQ), or scheduling request information, or a combination message of the two, which is not limited in this application.
  • BFRQ link failure request message
  • the first request message may also be carried on one or more first resources, which is not limited in this embodiment.
  • the first request message may also indicate link failure of the M first cells.
  • first resource and the second resource may be resources on the second cell.
  • the first cell may be Scell
  • the second cell may be Pcell.
  • the first preset condition may mean that the channel quality of the reference signal is greater than or equal to the first preset threshold.
  • the first reference signal that does not meet the first preset condition may also include the following Any one of the situations: (1) The first reference signal resource set is not configured, but the first preset threshold is configured; (2) The first reference signal resource set is configured, but the first preset threshold is not configured; (3) The first reference signal resource set and the first preset threshold are configured, and the first reference signal larger than the first preset threshold is not identified or not; (4) The first reference signal resource set and the first preset threshold are not configured .
  • the first reference signal resource set may be referred to as a link failure recovery reference signal resource set
  • the first preset threshold may be referred to as a link recovery threshold, which is not limited in this application.
  • channel quality can be reference signal received power (L1-reference signal received power, L1-RSRP), signal to interference plus noise ratio (L1-signal to interference plus noise ratio, L1-SINR) ), at least one of signal to interference plus noise ratio (SINR), channel quality indication (CQI), etc.
  • L1-RSRP reference signal received power
  • L1-SINR signal to interference plus noise ratio
  • SINR channel quality indication
  • the terminal device can detect the DCI information on the second cell (for example, Pcell) to determine a new reference signal resource set; if the terminal device confirms that there is a new link, it can be based on the new link
  • the road detects response information on the first cell, and this application includes but is not limited to this.
  • the terminal device when a link failure occurs for link recovery, if the terminal device determines that a new link is not recognized, the terminal device can report the identity of the cell where the link failure occurred and the information that the cell did not recognize the new link. For the network device, the network device can reconfigure a new resource set according to the information, and notify the terminal device of the new resource set through the response message of the first request message, in other words, indicate other resources through the response message of the first request message Collect the reference signals in the set and report the reference signals in the resource set for link recovery, thereby improving the probability of link failure recovery, reducing link failure recovery delay, and improving link failure recovery reliability.
  • the cell information of the M first cells includes cell identities of the M first cells and/or information about the first state of the M first cells.
  • the cell information of the M first cells includes the cell identities of the M first cells and/or the information of the first state of the M first cells
  • the cell information of includes the cell identities of the M first cells and the information of the first state of the M first cells, or the cell information of the M first cells includes the information of the first state of the M first cells
  • the message is used to indicate the cell identity of the M first cells and the information of the first state of the M first cells, or the first request message is used to indicate the information of the first state of the M first cells”
  • the cell information of the M first cells only includes the information of the first state. That is, the first request message indicates that a link failure has occurred in the first cell (it may not indicate which cell has the link failure, but may indicate the range of cells in which the link has failed, for example, a cell in the first group of cells has a link failure), And the state of the new link of the cell where the link failure cannot be identified.
  • the network device can reconfigure some reference signal resources to restore the link.
  • the information of the first state of the M first cells can be understood as that the M first cells may share a first state, and the first state indicates that none of the M first cells has recognized the new link. It can also be understood that each of the M first cells has a first state (that is, there are M first states), and the first state corresponding to a certain cell indicates that the first cell is not identified To the new link.
  • the network device learns that the terminal device cannot obtain the first reference signal that meets the first preset condition. Assume that the first reference signal of the condition, that is, the network device implicitly knows the first state at this time, so the terminal device may only need to (display or implicitly) report the M cell identities of the first cell, instead of reporting the M The first state information of the first cell (or the first request message implicitly indicates the first state information of the M first cells).
  • the terminal device must report at least M messages of the first state of the first cell, so that the network device can reconfigure or indicate a new Reference signal resource collection to restore the link.
  • the first request message displays or implicitly indicates the information of the first state of the M first cells for the above several situations.
  • the cell information of the M first cells includes M cell identities and first state information
  • the first state information may indicate that the M Scells do not recognize a new link.
  • the network device can configure one or more resources for the cell with the link failure.
  • the resource is used to carry the first request message.
  • the first request message can indicate whether any cell has a link failure and which cells have it. The link failed. If the terminal device does not recognize the new link of the cell with the link failure, the first request message may indicate that the cell with the link failure does not recognize the new link. If the network equipment can learn the new link identification status of the cell where the link failure occurs and/or the cell where the link fails, so that the network equipment can promptly identify the cell where the link failure occurs without a new link. Trigger a new set of resources, thereby reducing link failure recovery delay.
  • the method further includes: sending a second request message.
  • the second request message is used to indicate to restore the information of the K second reference signals of the i-th first cell among the M first cells, 1 ⁇ i ⁇ M, 1 ⁇ K ⁇ N, and i , K is an integer, and or, the second request message is used to indicate the information of the first state of the j-th first cell among the M first cells, and the first state is that the second preset is not satisfied
  • the threshold is used to restore the state of the second reference signal of the j-th first cell, 1 ⁇ j ⁇ M, and j is an integer.
  • the content indicated by the second request message may have one or more of the following situations:
  • the terminal equipment identifies all the new links of the M first cells in the N second reference signals (it can also be understood that each cell of the M first cells has at least one corresponding new link) .
  • the second request message may be used to indicate to restore the information of the K second reference signals of the i-th first cell among the M first cells, 1 ⁇ i ⁇ M, 1 ⁇ K ⁇ N, And i and K are integers, and i can be any value from 1 to M. It should be understood that the value of K corresponding to each cell may not be equal at this time.
  • the terminal equipment does not recognize the new link of any one of the M first cells in the N second reference signals (it can also be understood that each of the M first cells does not have a corresponding new link The link is recognized).
  • the second request message is used to indicate the information of the first state of the j-th first cell among the M first cells, and the first state is the information used for recovery that does not meet the second preset threshold.
  • the state of the second reference signal of the j-th first cell is 1 ⁇ j ⁇ M, and j is an integer, and j can be any value from 1 to M.
  • the terminal equipment recognizes a part of the new link of the first cell among the M first cells in the N second reference signals, but does not recognize the new link of the other part of the first cell among the M first cells (It can also be understood that the new links of some of the M first cells are recognized, and the new links of the other part of the cells are not recognized).
  • the second request message is used to indicate to restore the information of the K second reference signals of the i-th first cell among the M first cells, 1 ⁇ i ⁇ M, 1 ⁇ K ⁇ N, and i, K are integers, and the second request message is also used to indicate the information of the first state of the j-th first cell among the M first cells, and the first state is that the second preset is not satisfied
  • the threshold is used to restore the state of the second reference signal of the j-th first cell, 1 ⁇ j ⁇ M, and j is an integer. Where i is not equal to j. That is, the second request message is used to instruct to restore the information of the K second reference signals of the i-th first cell in the M first cells and the j-th first reference signal in the M first cells. Information about the first state of the cell.
  • the terminal device may send the second request information on the uplink resource (PUSCH) indicated by the response information of the first request message.
  • PUSCH uplink resource
  • the channel quality of each second reference signal in the K second reference signals is greater than or equal to the second preset threshold.
  • the second preset threshold here may be the first preset threshold, that is, the link recovery threshold.
  • the method further includes: receiving a response message of the second request message on a third resource according to the information of the K second reference signals.
  • the third resource is a resource on the first cell.
  • the third resource may be a resource on the Scell.
  • the third resource may be a resource on the i-th first cell.
  • the number of times is greater than or equal to the preset state.
  • the terminal device reports no new beam (no new beam) through the second request message one or more times reaches the preset number, but has not received the response information of the second request information, it confirms The link recovery of the i first cell fails.
  • the first request information and/or the second request information indicate that the first state of the i-th first cell of the M first cells is equal to the preset number of times, and the response information of the second request information cannot be received, Do not send the second request information of the i-th first cell. Specifically, when the number of times that the terminal device reports no new beam (no new beam) through the first request message and/or the second request message one or more times reaches the preset number of times, but the second request information has not been received yet When the response information is received, the second request message can no longer be sent cyclically, and the default is the link recovery failure state.
  • the response message of the first request message is any one of the following: downlink control information DCI in a dedicated search space; or DCI of a dedicated control resource set ; Or the DCI scrambled by the RNTI temporarily identified by the dedicated wireless network; or the DCI containing the preset state value.
  • a method for link failure recovery including: receiving a first request message on a first resource, where the first request message is used to indicate cell information of M first cells where a link failure occurs,
  • the M first cells are in a first state, where the first state is a state in which each of the M first cells does not have a first reference signal that meets a first preset condition, M ⁇ 1, and M is an integer; the cell information of the M first cells is determined according to the first request message; the response message of the first request message is sent on the second resource, and the response message of the first request message is used to indicate the second
  • a resource set of the reference signal, the resource set of the second reference signal includes N resources for recovering the second reference signal of the M first cells, N ⁇ 1, and N is an integer.
  • the cell information of the M first cells includes cell identities of the M first cells and/or information about the first state of the M first cells.
  • the method further includes: receiving a second request message, wherein the first request message The second request message is used to indicate to restore the information of the K second reference signals of the i-th first cell among the M first cells, 1 ⁇ i ⁇ M, 1 ⁇ K ⁇ N, and i, K are integers, And/or the second request message is used to indicate the information of the first state of the j-th first cell among the M first cells, and the first state is that there is no satisfaction for restoring the j-th first cell
  • the state of the second reference signal of the second preset threshold is 1 ⁇ j ⁇ M, and j is an integer.
  • the channel quality of each second reference signal in the K second reference signals is greater than or equal to the second preset threshold.
  • the method further includes: sending a response message of the second request message on a third resource according to the information of the K second reference signals.
  • the number of times is greater than or equal to the preset state.
  • the number of times confirm that the link recovery of the i-th first cell fails.
  • the response message of the first request message is any one of the following: downlink control information DCI in a dedicated search space; or DCI of a dedicated control resource set ; Or the DCI scrambled by the RNTI temporarily identified by the dedicated wireless network; or the DCI containing the preset state value.
  • a method for link failure recovery including: determining that L first cell links have failed; sending a first request message, the first request message including first indication information, the first indication information is used For indicating the cell information of the L first cells, L ⁇ 1, and L is an integer; wherein, the first indication information includes the first part of content and/or the second part of content, and the first part of content is used to indicate the L
  • the cell identifier of the first cell, the content of the second part is used to indicate whether there is no first reference signal that meets the first preset condition.
  • the terminal device detects the current link and determines that L Scells have link failures, including Scells that have identified a new link and M Scells that have not identified a new link.
  • L Scells have link failures, including Scells that have identified a new link and M Scells that have not identified a new link.
  • M Scells that have not identified a new link.
  • the Each Scell of the M Scells has no new link, where L ⁇ M ⁇ 1, and L and M are integers.
  • the network device can configure one or more resources for the terminal device, the resource is used to carry the first indication information, the first indication information can indicate whether a link failure occurs in one or more cells, or indicate the link The cell identity of one or more cells that failed, and indicates the new link identification status of each cell of the one or more cells (whether the new link is recognized), and the terminal device reports the first indication information to the network device .
  • the network equipment can learn the cell where the link failure occurs and the new link identification status of the cell, so that the network equipment can promptly trigger the new reference signal resource based on the new link identification status of each link failure cell Collection, thereby reducing link failure recovery delay.
  • the content of the second part is used to indicate whether each of the L first cells does not have a first reference signal that meets a first preset condition; or
  • the second part of the content is used to indicate whether all the first cells in the L first cells do not have the first reference signal that meets the first preset condition.
  • the second part of content is used to indicate whether each first cell of the L first cells has a first reference signal that meets the first preset condition; or the second part of content is used for Indicates whether all the first cells in the L first cells have first reference signals that meet the first preset condition; or the second part is used to indicate that at least one of the L first cells has a first reference signal The cell has a first reference signal that meets the first preset condition.
  • the method further includes: sending a second request message, the second request message including second indication information, and the second indication information is used to instruct to resume the Information of reference signals of L first cells.
  • the second request message is used to indicate to restore the information of the reference signals of the L first cells.
  • the second request message is used to instruct to restore the information of the reference signals of the L first cells including: the second request message is used to instruct to restore the The first state of each of the L first cells or the information of the reference signal.
  • the second part of the content is used to indicate that when at least one of the L first cells meets the first reference signal of the first preset condition, the second request message indicates the reference signal that meets the first preset condition And status information that does not meet the first preset condition. It can also be understood that the second request message indicates the reference signal information corresponding to those cells that have identified the new link, and the first state of the cells that have not identified the new link.
  • the first indication information and the second indication information are encoded independently.
  • the first request message and the second request message are the same or different request messages.
  • the first indication information and the second indication information may be sent through the same or different link failure request messages.
  • the first request message and the second request message may be the same request information, for example, collectively referred to as the first request message.
  • “do not send the second request message” can be understood as “do not send the second indication information”; alternatively, it can be understood that the second indication information is not included in the first request message; or alternatively, it can be understood as the first Only the first indication information is included in the request message.
  • the first indication information and the second indication information are carried on the same channel or carried on different channels.
  • the terminal device may not generate the second request message at this time, or The second request message is not sent because there is no new link information to be reported to the network device.
  • the second part of content may indicate that some cells are in the first state and some cells are in the second state.
  • the corresponding second indication information includes a part of the information of the first reference signal and a part of the information of the second reference signal.
  • the second indication information indicates Restore the information of the second reference signal of the i-th first cell
  • the first state is the state in which the i-th first cell among the L first cells does not meet the first reference signal of the first preset condition , 1 ⁇ i ⁇ L, and i is an integer.
  • the second indication information is used In the information indicating the restoration of the first reference signal of the j-th first cell, where the second state is that the j-th first cell among the L first cells has a first reference signal that satisfies the first preset condition
  • the state of the reference signal, 1 ⁇ j ⁇ L, and j is an integer.
  • the content indicated by the second request message may have one or more of the following situations:
  • the terminal equipment does not recognize the new link of any one of the L first cells: that is, when the second part of the content indicates that all the first cells in the L first cells are in the first state, the first The second indication information indicates the information for restoring the second reference signal of the L first cells, and the first state is that the i-th first cell in the L first cells does not meet the first reference of the first preset condition
  • the state of the signal, 1 ⁇ i ⁇ L, and i is an integer, i can be any value from 1 to L.
  • the terminal equipment recognizes the new link of any one of the L first cells: that is, when the second part of the content indicates that all the first cells of the L first cells are in the second state, the second The indication information indicates information for restoring the first reference signals of the L first cells, and the second state is that the j-th first cell among the L first cells has a first reference signal that meets the first preset condition
  • the terminal equipment recognizes a part of the new link of the first cell among the M first cells in the N second reference signals, but does not recognize the new link of the other part of the first cell among the M first cells (It can also be understood that the new links of some of the M first cells are recognized, and the new links of the other part of the cells are not recognized): That is, the content of the second part indicates that the new links of the L first cells
  • the second indication information indicates to restore the information of the second reference signal of the i-th first cell and restore the j-th Information about the first reference signal of the first cell, where 1 ⁇ j ⁇ L, 1 ⁇ i ⁇ L, i is not equal to j, and i and j are integers.
  • the w-th reference signal indicated by the second indication information corresponds to the w-th cell of the L first cells indicated by the content of the first part, 1 ⁇ i ⁇ L, and w is an integer.
  • the method further includes: detecting the L indicated by the first part of the content according to the i-th reference signal indicated by the second indication information
  • the response information of the i-th cell of the first cell, 1 ⁇ i ⁇ L, and i is an integer.
  • first request message in the third aspect may be different from the “first request message” in the first aspect
  • second request message in the third aspect is different from the “second request message” in the first aspect.
  • Message can be different.
  • a method for link failure recovery including: receiving a first request message, where the first request message includes first indication information, and the first indication information is used to indicate cell information of L first cells ,
  • the L first cells are cells with link failures, L ⁇ 1, and L is an integer, where the first indication information includes the first part of the content and/or the second part of the content, and the first part of the content is used to indicate the
  • the cell identifiers of the L first cells, the content of the second part is used to indicate whether there is no first reference signal that meets the first preset condition; the cell information of the L first cells is determined according to the first request message.
  • the content of the second part is used to indicate whether each first cell of the L first cells does not have a first reference signal that meets a first preset condition; or
  • the second part of the content is used to indicate whether all the first cells in the L first cells do not have the first reference signal that meets the first preset condition.
  • the method further includes: sending a second request message, the second request message including second indication information, and the second indication information is used to instruct to resume the Information of reference signals of L first cells.
  • the first indication information and the second indication information are encoded independently.
  • the first indication information and the second indication information are carried on the same channel or carried on different channels.
  • the second indication information indicates Restore the information of the second reference signal of the i-th first cell
  • the first state is the state in which the i-th first cell among the L first cells does not meet the first reference signal of the first preset condition , 1 ⁇ i ⁇ L, and i is an integer.
  • the second indication information is used In the information indicating the restoration of the first reference signal of the j-th first cell, where the second state is that the j-th first cell among the L first cells has a first reference signal that satisfies the first preset condition
  • the state of the reference signal, 1 ⁇ j ⁇ L, and j is an integer.
  • the i-th reference signal indicated by the second indication information corresponds to the i-th cell of the L first cells indicated by the content of the first part, 1 ⁇ i ⁇ L, and i is an integer.
  • the “first request message” in the fourth aspect may be different from the “first request message” in the second aspect, and the “second request message” in the fourth aspect is different from the second request message.
  • the “second request message” in the aspect may be different.
  • a method for link failure recovery including: determining that M first cells are in a first state, where the first state is that each of the M first cells does not satisfy the first state A state of the first reference signal under a preset condition; sending a first request message on the first resource, the first request message being used to indicate cell information of the M first cells, M ⁇ 1, and M is an integer; A response message of the first request message is received, where the response message of the first request message is used to indicate quasi-collocation (QCL) information of at least one cell among the M first cells.
  • QCL quasi-collocation
  • the link failure is stopped and the clock timing is restored.
  • first aspect and the fifth aspect may be combined with the third aspect, that is, the first aspect and the second aspect may be part of the third aspect.
  • a method for link failure recovery including: receiving a first request message on a first resource, where the first request message is used to indicate cell information of M first cells where a link failure occurs, The M first cells are in a first state, where the first state is a state in which each of the M first cells does not have a first reference signal that meets a first preset condition, M ⁇ 1, and M is an integer; the response message of the first request message is sent, and the response message of the first request message is used to indicate the QCL information of at least one of the M first cells.
  • the response message of the first request message is a transmission configuration indicator (transmission configuration indicator, TCI).
  • a device for link failure recovery including: a processing unit, configured to determine that M first cells where a link failure occurs are in a first state, wherein the first state is the M first state Each cell in the cell does not have the state of the first reference signal that meets the first preset condition, M ⁇ 1, and M is an integer; the communication unit is used to send the first request message on the first resource, the first The request message is used to indicate the cell information of the M first cells; the communication unit is also used to receive the response message of the first request message on the second resource, and the response message of the first request message is used to indicate the second
  • the resource set of the reference signal, the resource set of the second reference signal includes N resources for recovering the second reference signal of the M first cells, N ⁇ 1, and N is an integer; the processing unit is also used for Determine the resource set of the second reference signal according to the response message of the first request message.
  • the cell information of the M first cells includes cell identities of the M first cells and/or information about the first state of the M first cells.
  • the communication unit is further configured to: send the second request message; wherein, the second request message is used to instruct to restore the M first
  • the information of the K second reference signals of the i-th first cell in the cell, 1 ⁇ i ⁇ M, 1 ⁇ K ⁇ N, and i and K are integers, and or, the second request message is used to indicate all Information about the first state of the j-th first cell among the M first cells, where the first state is a second reference for restoring the j-th first cell that does not meet a second preset threshold
  • the state of the signal, 1 ⁇ j ⁇ M, and j is an integer.
  • the channel quality of each second reference signal in the K second reference signals is greater than or equal to the second preset threshold.
  • the communication unit is further configured to: receive the response message of the second request message on the third resource according to the information of the K second reference signals .
  • the number of times is greater than or equal to the preset state.
  • the link recovery of the i-th first cell fails, 1 ⁇ i ⁇ M, and i is an integer.
  • the response message of the first request message is any one of the following: downlink control information DCI in a dedicated search space; or DCI of a dedicated control resource set ; Or the DCI scrambled by the RNTI temporarily identified by the dedicated wireless network; or the DCI containing the preset state value.
  • a device for link failure recovery including: a communication unit, configured to receive a first request message on a first resource, where the first request message is used to indicate M first request messages that have link failures.
  • Cell information of the cell the M first cells are in a first state, where the first state is a state in which each of the M first cells does not have a first reference signal that meets a first preset condition, M ⁇ 1, and M is an integer;
  • the processing unit is configured to determine the cell information of the M first cells according to the first request message;
  • the communication unit is also configured to send the first request message on the second resource
  • the response message of the first request message is used to indicate the resource set of the second reference signal, and the resource set of the second reference signal includes N resources for recovering the second reference signal of the M first cells , N ⁇ 1, and N is an integer.
  • the cell information of the M first cells includes cell identities of the M first cells and/or information about the first state of the M first cells.
  • the communication unit is further configured to: receive a second request message, where the second request message is used to instruct to restore the data in the M first cells Information about the K second reference signals of the i-th first cell, 1 ⁇ i ⁇ M, 1 ⁇ K ⁇ N, and i and K are integers, and/or the second request message is used to indicate the M-th Information about the first state of the j-th first cell in a cell, where the first state is a state where there is no second reference signal that meets the second preset threshold for restoring the j-th first cell, 1 ⁇ j ⁇ M, and j is an integer.
  • the channel quality of each second reference signal in the K second reference signals is greater than or equal to the second preset threshold.
  • the communication unit is further configured to: send the response message of the second request message on the third resource according to the information of the K second reference signals .
  • the number of times is greater than or equal to the preset state.
  • the response message of the first request message is any one of the following: downlink control information DCI in a dedicated search space; or DCI of a dedicated control resource set ; Or the DCI scrambled by the RNTI temporarily identified by the dedicated wireless network; or the DCI containing the preset state value.
  • a device for link failure recovery including: determining that a link failure occurs in L cells; sending a first request message, the first request message including first indication information, and the first indication information is used for Indicate the cell information of the L first cells, L ⁇ 1, and L is an integer; wherein, the first indication information includes the first part of content and/or the second part of content, and the first part of content is used to indicate the L
  • the cell identifier of a cell, the content of the second part is used to indicate whether there is no first reference signal that meets the first preset condition.
  • the content of the second part is used to indicate whether each of the L first cells does not satisfy the first preset condition.
  • Reference signal; or the second part of the content is used to indicate whether all the first cells in the L first cells do not have the first reference signal that meets the first preset condition.
  • the apparatus further includes: sending a second request message, the second request message including second indication information, and the second indication information is used to instruct to resume the Information of reference signals of L first cells.
  • the first indication information and the second indication information are encoded independently.
  • the first indication information and the second indication information are carried on the same channel or carried on different channels.
  • the second indication information indicates Restore the information of the second reference signal of the i-th first cell
  • the first state is the state in which the i-th first cell among the L first cells does not meet the first reference signal of the first preset condition , 1 ⁇ i ⁇ L, and i is an integer.
  • the second indication information is used In the information indicating the restoration of the first reference signal of the j-th first cell, where the second state is that the j-th first cell among the L first cells has a first reference signal that satisfies the first preset condition
  • the state of the reference signal, 1 ⁇ j ⁇ L, and j is an integer.
  • the i-th reference signal indicated by the second indication information corresponds to the i-th cell of the L first cells indicated by the content of the first part, 1 ⁇ i ⁇ L, and i is an integer. It should be understood that the “first request message” in the ninth aspect may be different from the “first request message” in the seventh aspect, and the “second request message” in the ninth aspect is different from the “second request message” in the seventh aspect. Message" can be different.
  • a device for link failure recovery including: a communication unit configured to receive a first request message, where the first request message includes first indication information, and the first indication information is used to indicate the Lth Cell information of a cell, the L cells are cells where link failure occurs, L ⁇ 1, and L is an integer, where the first indication information includes the first part of content and/or the second part of content, and the first part of content Used to indicate the cell identities of the L first cells, the second part of the content is used to indicate whether there is no first reference signal that meets the first preset condition; the processing unit is used to determine the L The cell information of the first cell.
  • the content of the second part is used to indicate whether each of the L first cells does not satisfy the first preset condition.
  • Reference signal; or the second part of the content is used to indicate whether all the first cells in the L first cells do not have the first reference signal that meets the first preset condition.
  • the communication unit is further configured to: send a second request message, where the second request message includes second indication information, and the second indication information is used to indicate Restore the reference signal information of the L first cells.
  • the first indication information and the second indication information are encoded independently.
  • the first indication information and the second indication information are carried on the same channel or carried on different channels.
  • the communication unit when the second part of the content indicates the first state, the communication unit does not send the second request message, and the first state is the L-th Each cell in a cell does not have the state of the first reference signal that meets the first preset condition.
  • the second indication information indicates Restore the information of the second reference signal of the i-th first cell
  • the first state is the state in which the i-th first cell among the L first cells does not meet the first reference signal of the first preset condition , 1 ⁇ i ⁇ L, and i is an integer.
  • the second indication information is used in the information indicating the restoration of the first reference signal of the j-th first cell, where the second state is that the j-th first cell among the L first cells has a first reference signal that satisfies the first preset condition
  • the state of the reference signal, 1 ⁇ j ⁇ L, and j is an integer.
  • the i-th reference signal indicated by the second indication information corresponds to the i-th cell of the L first cells indicated by the content of the first part, 1 ⁇ i ⁇ L, and i is an integer.
  • first request message in the tenth aspect may be different from the “first request message” in the eighth aspect, and the “second request message” in the tenth aspect is different from the “second request message” in the eighth aspect.
  • Message can be different.
  • a device for link failure recovery including: a processing unit, configured to determine that M first cells are in a first state, where the first state is each of the M first cells None of the cells have the status of the first reference signal that meets the first preset condition; the communication unit is configured to send a first request message on the first resource, and the first request message is used to indicate the cells of the M first cells Information, M ⁇ 1, and M is an integer; the communication unit is also used to receive a response message of the first request message, and the response message of the first request message is used to indicate the status of at least one of the M first cells Quasi-collocation (QCL) information.
  • QCL Quasi-collocation
  • the processing unit is further configured to stop the link failure and recover the clock timing after receiving the response message of the first request message.
  • a method for link failure recovery including: a communication unit, configured to receive a first request message on a first resource, where the first request message is used to indicate the Mth link failure Cell information of a cell, where the M first cells are in a first state, where the first state is a state in which each of the M first cells does not have a first reference signal that meets a first preset condition , M ⁇ 1, and M is an integer; the processing unit is configured to determine the cell information of the M first cells according to the first request message; the communication unit is also configured to send a response message of the first request message, The response message of the first request message is used to indicate the QCL information of at least one cell among the M first cells.
  • the response message of the first request message is a transmission configuration indicator (transmission configuration indicator, TCI).
  • a communication device in a thirteenth aspect, has the function of implementing the terminal device in the method design of the above-mentioned first aspect, third aspect, and fifth aspect.
  • These functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a communication device in a fourteenth aspect, has the function of implementing the network equipment (such as a base station) in the method design of the above-mentioned second, fourth, and sixth aspects.
  • These functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a terminal device including a transceiver and a processor.
  • the terminal device further includes a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the terminal device executes the aforementioned first, third, and fifth aspects. Any one of the possible implementation methods.
  • a network device including a transceiver and a processor.
  • the terminal device further includes a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the terminal device executes any of the foregoing second, fourth, and sixth aspects.
  • a seventeenth aspect provides a communication system, which includes the terminal devices of the seventh, ninth, and eleventh aspects and the network devices of the eighth, tenth, and twelfth aspects; or, The system includes the terminal equipment of the fifteenth aspect and the network equipment of the sixteenth aspect.
  • a communication device may be the terminal device in the above method design, or a chip set in the terminal device.
  • the communication device includes a processor, which is coupled to a memory, and can be used to execute instructions in the memory to implement the method executed by the terminal device in any one of the foregoing first, third, and fifth aspects.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a communication device may be a network device designed in the above method, or a chip set in the network device.
  • the communication device includes a processor, which is coupled with a memory, and can be used to execute instructions in the memory to implement the method executed by the network device in any one of the foregoing second, fourth, and sixth aspects.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication interface may be a transceiver or an input/output interface.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a computer program product comprising: computer program code, when the computer program code runs on a computer, the computer executes the methods in the above aspects.
  • a computer-readable medium stores program code, and when the computer program code runs on a computer, the computer executes the methods in the above-mentioned aspects.
  • FIG. 1 is a schematic diagram of the architecture of a mobile communication system applicable to an embodiment of the present application.
  • Figure 2 is a schematic flowchart of a method for link failure recovery.
  • FIG. 3 is a schematic flowchart of an example of a method for link failure recovery provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of another example of a method for link failure recovery provided by an embodiment of the present application.
  • FIG. 5 shows a schematic block diagram of an example of a link failure recovery apparatus according to an embodiment of the present application.
  • FIG. 6 shows a schematic block diagram of another example of a device for link failure recovery according to an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the technical solutions of the embodiments of this application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex) , TDD), the 5th generation (5G) mobile communication system or the new radio (NR) communication system.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • 5G mobile communication system includes 5G mobile communication systems including non-stand alone (NSA) Communication system and/or standalone (SA) 5G mobile communication system.
  • SA standalone
  • the technical solutions of the embodiments of the present application can also be applied to future mobile communication systems, such as the sixth generation mobile communication system.
  • the terminal equipment in the embodiments of this application may refer to user equipment (UE), access terminal equipment, user unit, user station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, user terminal equipment, Terminal equipment, wireless communication equipment, user agent or user device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (PLMN) Terminal equipment, etc., this embodiment of the present application does not limit this.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • PLMN public land mobile network
  • the network device in the embodiment of the application may be a device used to communicate with a terminal device.
  • the network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA)
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • the base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evoled) in the LTE system.
  • NodeB, NB base station
  • WCDMA wideband code division multiple access
  • evoled evolved base station
  • NodeB eNB or eNodeB
  • it can also be a wireless controller in a cloud radio access network (CRAN) scenario
  • the network device can be a relay station, access point, vehicle-mounted device, wearable device, and future
  • the network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application.
  • the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.
  • Computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • FIG. 1 is a schematic diagram of the architecture of a mobile communication system applicable to an embodiment of the present application.
  • the communication system in FIG. 1 may include at least one terminal device (for example, a terminal device 10, a terminal device 20, a terminal device 30, a terminal device 40, a terminal device 50, and a terminal device 60) and a network device 70.
  • the network device 70 is used to provide communication services for the terminal device and access the core network.
  • the terminal device can access the network by searching for synchronization signals, broadcast signals, etc. sent by the network device 70 to communicate with the network.
  • the terminal device 10, the terminal device 20, the terminal device 30, the terminal device 40, and the terminal device 60 in FIG. 1 can perform uplink and downlink transmissions with the network device 70.
  • the network device 70 can send downlink signals to the terminal device 10, the terminal device 20, the terminal device 30, the terminal device 40, and the terminal device 60, and can also receive the terminal device 10, the terminal device 20, the terminal device 30, the terminal device 40, and the terminal device. Uplink signal sent by device 60.
  • the terminal device 40, the terminal device 50, and the terminal device 60 can also be regarded as a communication system.
  • the terminal device 60 can send downlink signals to the terminal device 40 and the terminal device 50, and can also receive uplink signals sent by the terminal device 40 and the terminal device 50. signal.
  • embodiments of the present application may be applied to a communication system including one or more network devices, and may also be applied to a communication system including one or more terminal devices, which is not limited in this application.
  • Control resource set (CORESET)
  • the network device can configure one or more resource sets for the terminal device to send a physical downlink control channel (PDCCH).
  • the network device can send a control channel to the terminal device on any control resource set corresponding to the terminal device.
  • the network device also needs to notify the terminal device of other associated configurations of the control resource set, such as a search space set.
  • the control resource set in this application may be a CORESET or control region (control region) defined by the 5G mobile communication system or an enhanced-physical downlink control channel (ePDCCH) set (set).
  • the time-frequency position occupied by the PDCCH can be referred to as the downlink control region.
  • the PDCCH is always located in the first m (m possible values of 1, 2, 3, and 4) symbols in a subframe. It should be noted that the positions of E-PDCCH and R-PDCCH in LTE are not in the first m symbols.
  • the downlink control area can be flexibly configured by RRC signaling through control resource set (CORESET) and search space set (search space set):
  • CORESET control resource set
  • search space set search space set
  • the control resource set can be configured with PDCCH or control channel element (control channel element, CCE) frequency domain position, time domain continuous symbol number (the maximum value is 3) and other information;
  • control channel element control channel element, CCE
  • the search space set can be configured with PDCCH detection period and offset, starting symbol in a time slot and other information.
  • the search space set can be configured with a PDCCH cycle as 1 time slot, and the time domain start symbol is symbol 0, then the terminal device can detect the PDCCH at the start position of each time slot.
  • the quasi-co-site/quasi-co-location QCL hypothesis information may also be referred to as QCL information, and the QCL information is used to assist in describing the terminal device receiving beamforming information and the receiving process.
  • the target reference signal can generally be a demodulation reference signal (DMRS), a channel state information reference signal (CSI-RS) ), etc.
  • CSI-RS channel state information reference signal
  • the reference signal or source reference signal cited can generally be CSI-RS, tracking reference signal (tracking reference signal, TRS), synchronous signal broadcast channel block (synchronous signal/PBCH block, SSB), sounding reference signal ( sounding reference signal, SRS) etc.
  • the spatial characteristic parameters of the two reference signals or channels that satisfy the QCL relationship are the same, so that the spatial characteristic parameters of the target reference signal can be inferred based on the source reference signal resource index.
  • the spatial characteristic parameters of the two reference signals or channels that satisfy the spatial correlation information are the same, so that the spatial characteristic parameters of the target reference signal can be inferred based on the source reference signal resource index.
  • the spatial characteristic parameters include one or more of the following parameters:
  • Angle of incidence AoA
  • dominant (dominant) incidence angle AoA average incidence angle
  • power angular spectrum PAS
  • exit angle angle of departure, AoD
  • main exit angle Average exit angle, power angle spectrum of exit angle
  • terminal equipment transmit beamforming terminal equipment receive beamforming, spatial channel correlation, network equipment transmit beamforming, network equipment receive beamforming, average channel gain, average channel delay (average delay), delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (doppler shift), spatial reception parameters (spatial Rx parameters), etc.
  • These spatial characteristic parameters describe the spatial channel characteristics between the antenna ports of the source reference signal and the target reference signal, and help the terminal device to complete the receiving side beamforming or receiving processing process according to the QCL information. It should be understood that the terminal device can receive the target reference signal according to the received beam information of the source reference signal indicated by the QCL information; these spatial characteristic parameters also help the terminal device to complete the transmit-side beamforming or transmission processing process according to the spatial related information. It should be understood that the terminal device may transmit the target reference signal according to the transmit beam information of the source reference signal indicated by the spatial related information.
  • the network device may indicate the demodulation reference signal of the PDCCH or the physical downlink shared channel (physical downlink shared channel, PDSCH) and the terminal device One or more of the previously reported multiple reference signal resources satisfy the QCL relationship.
  • the reference signal may be a CSI-RS.
  • each reported CSI-RS resource index corresponds to a transmit and receive beam pair established during the previous measurement based on the CSI-RS resource. It should be understood that the receiving beam information of two reference signals or channels that satisfy the QCL relationship is the same, and the terminal device can infer the receiving beam information of receiving the PDCCH or PDSCH according to the reference signal resource index.
  • Network equipment can configure one or more types of QCL for terminal equipment at the same time, such as QCL type A+D, C+D:
  • QCL types A Doppler shift, Doppler spread, average delay, delay spread
  • scenario applicable to QCL hypothesis in this application may also be two reference signals, or further or an association relationship between transmission objects.
  • the spatial relation information is used to indicate the spatial transmission parameter relationship between the two reference signals.
  • the target reference signal can generally be DMRS, SRS, etc.
  • the reference signal or source reference signal to be quoted can generally be CSI-RS, SRS, SSB etc.
  • TCI Transmission configuration indicator
  • TCI is used to indicate PDCCH/CORESET or QCL information of PDSCH.
  • TCI information means that the reference signal included in the TCI meets the QCL relationship with the DMRS of the PDCCH/PDSCH. It is mainly used to indicate that when the PDCCH/PDSCH is received, its spatial reception parameters and other information are the same as the spatial reception parameters of the reference signal included in the TCI , Similar, similar.
  • a TCI state may include one or two reference signals that are referenced, and the associated QCL type (QCL type).
  • QCL types can be divided into four categories: A/B/C/D, which are different combinations or choices of ⁇ Doppler shift, Doppler spread, average delay, delay spread, and spatial Rx parameter ⁇ .
  • the TCI status includes QCL information, or the TCI status is used to indicate QCL information.
  • Synchronous signal broadcast channel block (synchronous signal/PBCH block, SS/PBCH block)
  • the SS/PBCH block can also be called SSB.
  • PBCH is an abbreviation of physical broadcast channel.
  • the SSB includes at least one of a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a PBCH. It is mainly used for cell search, cell synchronization, and signals carrying broadcast information.
  • CA Carrier aggregation
  • the bandwidth requirements of 3GPP can be met.
  • Each carrier in multi-carrier aggregation can be called "CC", and each carrier is composed of one or more physical resource blocks (PRB), and each carrier can have its own corresponding physical downlink control channel (physical downlink control channel (PDCCH), scheduling the physical downlink control channel (PDSCH) of each CC; there may be no PDCCH, but the PDSCH is scheduled through the PDCCH on other CCs.
  • a terminal device can receive data on multiple CCs, it can also be called a component carrier, a component carrier, or a component carrier.
  • Primary cell Primary cell (primary cell, Pcell):
  • the Pcell is the cell where the terminal equipment of the CA resides.
  • the terminal equipment of the CA corresponds to the physical uplink control channel (PUCCH).
  • PUCCH physical uplink control channel
  • Secondary primary cell (primary secondary cell, PScell):
  • the PScell is a special secondary cell on the secondary base station (secondary eNodeB, SeNB) that the master base station (master eNodeB, MeNB) configures to the DC UE through RRC connection signaling.
  • secondary eNodeB, SeNB secondary eNodeB
  • MeNB master base station
  • Secondary cell secondary cell, Scell
  • Scell refers to a cell configured to CA terminal equipment through RRC connection signaling. It works on SCC (secondary carrier) and can provide CA terminal equipment with more radio resources.
  • the SCell can have only downlink or both uplink and downlink.
  • Spcell refers to Pcells of a master cell group (MCG) or PScells of a secondary cell group (SCG); otherwise, as in the CA scenario, Spcell refers to Pcell.
  • MCG master cell group
  • SCG secondary cell group
  • MCG refers to the primary cell group in which the cell serving the terminal equipment in the primary base station is located.
  • a group of serving cells associated with the MeNB includes a Pcell and one or more Scells.
  • SCG means that the group of the cell serving the UE in the secondary base station is the secondary cell group. In the dual link mode, it includes PSCell and zero or more Scells.
  • the MeNB is the base station to which the cell where the DC terminal equipment resides.
  • SeNB is another base station configured by MeNB to DC UE through RRC connection signaling.
  • the beam is a communication resource.
  • the beam can be a wide beam, or a narrow beam, or other types of beams.
  • the beam forming technology can be beamforming technology or other technical means.
  • the beamforming technology can be specifically a digital beamforming technology, an analog beamforming technology, and a hybrid digital/analog beamforming technology. Different beams can be considered as different resources.
  • the same information or different information can be sent through different beams.
  • multiple beams with the same or similar communication characteristics can be regarded as one beam.
  • a beam can include one or more antenna ports for transmitting data channels, control channels, and sounding signals.
  • a transmit beam can refer to the distribution of signal strength formed in different directions in space after a signal is transmitted by an antenna.
  • the receiving beam may refer to the signal strength distribution of the wireless signal received from the antenna in different directions in space. It is understandable that one or more antenna ports forming a beam can also be regarded as an antenna port set.
  • Beams can be divided into transmitting beams and receiving beams of network equipment, and transmitting beams and receiving beams of terminal equipment.
  • the transmitting beam of the network device is used to describe the beamforming information on the transmitting side of the network device
  • the receiving beam of the base station is used to describe the beamforming information on the receiving side of the network device
  • the transmitting beam of the terminal device is used to describe the beamforming information on the transmitting side of the terminal device.
  • the receiving beam is used to describe the beamforming information on the receiving side of the terminal device. That is, beam is used to describe beamforming information.
  • the beam can correspond to time resources and or space resources and or frequency domain resources.
  • the beam may also correspond to a reference signal resource (for example, a reference signal resource for beamforming), or beamforming information.
  • a reference signal resource for example, a reference signal resource for beamforming
  • the beam may also correspond to the information associated with the reference signal resource of the network device, where the reference signal may be a channel state information reference signal (CSI-RS), SSB, demodulation reference signal (demodulation reference signal) signal, DMRS), phase tracking signal (phase tracking reference signal, PTRS) tracking signal (tracking reference signal, TRS), etc.
  • the information associated with the reference signal resource can be the reference signal resource identifier, or QCL information (especially type D QCL) etc.
  • the reference signal resource identifier corresponds to a transceiver beam pair established during the previous measurement based on the reference signal resource, and the terminal can infer beam information through the reference signal resource index.
  • the beam may also correspond to a spatial filter (spatial filter or spatial domain filter) and a spatial domain transmission filter (spatial domain transmission filter).
  • a spatial filter spatial filter or spatial domain filter
  • a spatial domain transmission filter spatial domain transmission filter
  • Communication systems usually use different types of reference signals: one type of reference signal is used to estimate the channel, so that the received signal containing control information or data can be coherently demodulated; the other type is used to measure the channel state or channel quality to achieve Scheduling of terminal equipment.
  • the terminal device obtains channel state information (Channel State Information, CSI) based on the channel quality measurement of the CSI-RS, and the CSI includes a rank indicator (rank indicator, RI), a precoding indicator (precoding matrix indicator, PMI), and a channel quality indicator At least one of (Channel Quality Indicator, CQI), etc.
  • CSI information can be sent to the base station by the terminal equipment through the physical uplink control channel or the physical uplink shared channel.
  • modern communication systems usually use multi-antenna technology to increase the capacity and coverage of the system or to improve the user experience.
  • Another advantage of using high-frequency bands is that the size of the multi-antenna configuration can be greatly reduced, thereby facilitating site location Acquire and deploy more antennas.
  • the high-frequency frequency band will cause greater path loss, especially the influence of factors such as the atmosphere and vegetation further aggravate the loss of wireless propagation.
  • the beamforming signals may include broadcast signals, synchronization signals, and cell-specific reference signals.
  • the direction of the shaped beam corresponding to the transmitted signal may no longer match the position of the user after the movement, resulting in frequent interruption of the received signal.
  • a channel quality measurement and result report based on beamforming technology is introduced.
  • the measurement of the channel quality may be based on a synchronization signal or a cell-specific reference signal after beamforming. Compared with cell handover, user handover between different shaped beams is more dynamic and frequent, so a dynamic measurement reporting mechanism is required.
  • the report of the channel quality result of the shaped beam may also be sent by the terminal device to the base station through a physical uplink control channel or a physical uplink shared channel.
  • the terminal device selects the better N beams by measuring multiple beams sent by the base station, and reports the better N beam measurement information to the base station.
  • the beam measurement information is also beam state information (BSI), and the content mainly includes beam index and reference signal received power (RSRP) of the beam.
  • BSI beam state information
  • RSRP reference signal received power
  • the network device measures multiple beams sent by the terminal device, and notifies the terminal device of the better beam among the multiple beams sent by the terminal device, for example, in the form of reference signal resources. , Such as beam index 1.
  • the receiving beam of the terminal device is indicated by the spatial RX parameter in the QCL, and the beam status information can be described as L1-RSRP related information.
  • the beam training process includes:
  • BPL optimal N beam pair links
  • the transmit beam can be a base station transmit beam or a terminal device transmit beam.
  • the transmitting beam is a base station transmitting beam
  • the base station sends reference signals to the terminal device through different transmitting beams
  • the terminal device receives the reference signal sent by the base station through different transmitting beams through the same receiving beam, and determines the base station's reference signal based on the received signal.
  • Optimal transmit beam and then feed back the optimal transmit beam of the base station to the base station, so that the base station can update the transmit beam.
  • the terminal device When the transmitting beam is a terminal transmitting beam, the terminal device sends a reference signal to the base station through different transmitting beams, and the base station receives the reference signal sent by the terminal equipment through different transmitting beams through the same receiving beam, and determines the terminal equipment based on the received signal
  • the optimal transmit beam of the terminal device is then fed back to the terminal device, so that the terminal device can update the transmit beam.
  • the foregoing process of transmitting reference signals through different transmit beams may be referred to as beam scanning, and the process of determining the optimal transmit beam based on the received signal may be referred to as beam matching.
  • the receiving beam may be a base station receiving beam or a terminal device receiving beam.
  • the terminal device sends a reference signal to the base station through the same transmitting beam.
  • the base station uses different receiving beams to receive the reference signal sent by the terminal device, and then determines the optimal receiving beam of the base station based on the received signal.
  • Update the receiving beam of the base station When the receiving beam is the receiving beam of the terminal device, the base station sends a reference signal to the terminal device through the same transmitting beam, and the terminal device uses different receiving beams to receive the reference signal sent by the base station, and then determines the optimal reception of the terminal device based on the received signal Beam to update the receiving beam of the terminal device.
  • both the base station transmitting beam and the terminal device receiving beam may change dynamically.
  • the optimal receiving beam determined by the terminal device based on the received signal may include multiple.
  • the terminal device may The information of the multiple receiving beams is fed back to the network device, and the network device may instruct the terminal device to receive the beam by sending beam indication information to the terminal device.
  • the terminal device adopts beamforming in the analog domain, the terminal device can accurately determine the receiving beam of the terminal based on the beam indication information sent by the network device, thereby saving the beam scanning time of the terminal device and achieving the effect of power saving.
  • the base station obtains N beam pairs BPL that are better for communication with the terminal equipment
  • the beam pair BPL is ⁇ Bx, B'x>, where Bx represents the base station's transmitting beam, and B'x represents the terminal The receiving beam of the device, and ⁇ By, B'y>, where By represents the transmitting beam of the terminal device, and B'y represents the receiving beam of the base station.
  • the base station will use these N BPLs for data transmission during subsequent communication with the terminal equipment.
  • the diffraction ability under the high-frequency channel is poor, which causes the beam of the current service to be blocked and the signal cannot be transmitted continuously.
  • Reference signal configured to detect link failure and restore link failure
  • network devices can configure terminal devices with reference signal resource sets for beam failure detection (for example, beam failure detection RS resourceconfig or beam failure detection RS or failure detection resources) (also called link Failure detection reference signal resource collection).
  • the network device can also configure the terminal device with a reference signal resource set used to restore the link between the terminal device and the network device (candidate beam RS list or candidate beam RS identification resource or beam failure candidate beam identification RS or candidate beam list) (It can also be referred to as a candidate reference signal resource set or a link failure recovery reference signal resource set).
  • the reference signal used to detect link failure can also be indicated implicitly.
  • the reference signal associated in the TCI indicating the PDCCH is used as the reference signal for detecting link failure.
  • the reference signal is a reference that satisfies the QCL relationship with the DMRS of the PDCCH. Signal, and is a reference signal sent periodically. Among them, the RS in the beam failure detection RS set and the demodulation reference signal of the downlink physical control channel PDCCH satisfy the QCL relationship or use the same TCI state as the PDCCH.
  • the channel quality information of some or all reference signals in the set (such as reference Signal receiving power (reference signal receiving power, RSRP), channel quality indicator (channel quality indicator, CQI), block error ratio (block error ratio, BLER), signal to interference plus noise ratio (signal to interference plus noise ratio, SINR)
  • RSRP reference Signal receiving power
  • CQI channel quality indicator
  • block error ratio block error ratio
  • SINR signal to interference plus noise ratio
  • the lower than the predetermined threshold may be W consecutive times lower than the predetermined threshold or W times lower than the predetermined threshold within a certain period of time.
  • the predetermined threshold may be the same as the radio link failure OOS (out of sync) threshold.
  • the predetermined threshold may be referred to as a link failure detection threshold, and may also be referred to as a link failure threshold. It should be understood that as long as the threshold used for link failure detection can be the predetermined threshold, the present invention does not limit the name of the predetermined threshold.
  • the terminal device After the beam fails, the terminal device needs to select reference signal resources with channel quality information (such as RSRP, CQI, etc.) higher than a predetermined threshold from the candidate reference signal resource set to restore the communication link.
  • the predetermined threshold can be configured by a network device.
  • beam failure detection RS is used for the terminal to detect the channel quality of a certain transmission beam of the network device, and the transmission beam is the beam used when the network device communicates with the terminal.
  • candidate beam identification RS is a reference signal set used by the terminal device to initiate link reconfiguration after determining that the transmission beam of the network device has a communication link failure.
  • communication failure may also be referred to as communication link failure, communication link failure, link failure, link failure, communication failure, beam failure, beam failure, etc.
  • the communication failure may mean that the signal quality of the reference signal used for beam failure detection of the PDCCH is less than or equal to a preset threshold.
  • the terminal device needs to select reference signal resources with channel quality information (such as RSRP, RSRQ, CQI, SINR, etc.) higher than a predetermined threshold from the set of candidate reference signal resources to restore the communication link.
  • channel quality information such as RSRP, RSRQ, CQI, SINR, etc.
  • the predetermined threshold may be configured by the network device, or may also be a predefined threshold.
  • the threshold used for mobility measurement is used by default.
  • the predetermined threshold may be referred to as the link failure recovery threshold, and may also be referred to as the link recovery threshold. It should be understood that any threshold used for link failure recovery can be the predetermined threshold, and the present invention does not limit the name of the predetermined threshold.
  • candidate beam identification RS is used by the terminal device to initiate a link reconfiguration reference signal set after determining that the transmission beam of the network device has a communication link failure.
  • communication failure recovery can also be referred to as recovering communication between network equipment and terminal equipment, communication failure recovery, link failure recovery, link failure recovery, beam failure recovery, beam failure recovery, communication link failure recovery, communication Link failure recovery, link reconfiguration, etc.
  • the names of the reference signal resource set used for beam failure detection and the reference signal resource set used to restore the link between the terminal device and the network device may also have other names, and this application will not make specifics about this. limited.
  • the communication failure recovery request information may also be referred to as communication failure recovery request information, link failure recovery request information, link failure recovery request information, beam failure recovery request information, beam failure recovery request information, communication link Failure recovery request information, communication link failure recovery request information, link reconfiguration request information, reconfiguration request information, etc. It should be understood that the communication failure recovery request information in the embodiment of the present application may be referred to as the first request message and or the second request message and or the third request message.
  • the communication failure recovery response information may also be referred to as communication failure response information, beam failure recovery response information, beam failure response information, communication link failure recovery response information, communication link failure response information, communication link failure Recovery response information, communication link failure response information, beam failure recovery response information, beam failure response information, link reconfiguration response information, link failure recovery response information, link failure response information, link failure recovery response information, chain Road failure response information, communication failure recovery response information, communication failure response information, reconfiguration response information, etc.
  • the communication failure recovery response information may be referred to as response information for short.
  • the communication failure recovery request may refer to sending a signal on the resource used to carry the communication failure recovery request
  • the communication failure recovery response information may refer to the control resource used to send the communication failure recovery response.
  • the communication failure recovery response information may also be DCI scrambled by other information (such as BFR-RNTI scrambled DCI)
  • the communication failure recovery response information may also be data scheduled by the aforementioned DCI
  • the communication failure recovery response information It may also be an ACK of data scheduled by the above-mentioned DCI.
  • the communication failure recovery response information may also be one of the following information: DCI scrambled by the cell radio network temporary identifier C-RNTI, modulation and coding method, DCI scrambled by the cell-specific wireless network temporary identifier MCS-C-RNTI, dedicated search
  • the downlink control information DCI in the space, the DCI scrambled by the temporary ID RNTI of the private wireless network, the DCI scrambled by the temporary ID RA-RNTI of the random access wireless network, the DCI containing the preset state value, and the DCI containing the transmission configuration indication TCI information ,
  • the embodiment of the present application does not limit this.
  • the link recovery failure of a certain cell can be understood as the terminal device no longer sending the first request information and/or the second request information and/or the third request information corresponding to the cell, or it can be understood as stopping
  • the timing of the link failure recovery clock can also be understood as stopping the counting of the link failure recovery counter.
  • the link recovery failure of a certain cell can be understood as the timeout of the link failure recovery clock corresponding to the cell, and or the link failure recovery counter has exceeded the maximum number of times or reached the maximum number of times and the response information of the cell is not received.
  • the link failure recovery counter is used to count the number of times the link failure recovery request information is sent.
  • the media access control (MAC) layer of the terminal device maintains a link failure recovery timer (beam failure recovery timer) and a link failure recovery counter (beam failure recovery counter).
  • the link failure recovery timer is used to control the entire link failure recovery time.
  • the link failure recovery counter is used to limit the number of times the terminal device sends link failure recovery requests. When the link failure recovery counter reaches the maximum value, the The terminal device considers that the link failure recovery is unsuccessful and stops the link failure recovery process.
  • the recovery time of the recovery timer and the count value of the recovery counter may be configured by the network device, or may be preset values.
  • the successful link recovery of a certain cell can be understood as the terminal device detecting the response information of the cell.
  • the time unit may be one or more radio frames, one or more subframes, one or more time slots, and one or more mini slots defined in the LTE or 5G NR system.
  • One or more orthogonal frequency division multiplexing (OFDM) symbols, etc. may also be a time window formed by multiple frames or subframes, such as a system information (SI) window.
  • SI system information
  • predetermined threshold in the embodiments of the present application can be replaced with a “predetermined threshold”, or that the "predetermined threshold” and “predetermined threshold” are equivalent concepts.
  • the "first reference signal” in this application is a corresponding reference signal in the resource set of the first reference signal, and the resource set of the first reference signal may be a candidate reference signal set.
  • the first reference signal resource set is a reference signal resource set used to restore the link of the first cell.
  • the corresponding reference signal in the resource set of the first reference signal may be a reference signal on the first cell or a reference signal on another cell.
  • the reference signal resource corresponding to the resource set of the first reference signal may be the reference signal resource on the first cell or the reference signal resource on other cells. The embodiment of the present application does not limit this.
  • the interaction between the terminal device and the network device is usually corresponding, that is, the terminal device sends information, and the corresponding network device will also receive the information; or the network device sends information, correspondingly, the terminal device Will also receive this information.
  • the physical resources used by the network device and the terminal device to send and receive information, or the applied rules such as cycle, priority order, etc. are also corresponding, which are not limited by the embodiments of the present application.
  • FIG. 2 is a schematic flowchart of a method for link failure recovery. As shown in FIG. 2, the link failure recovery method 200 includes the following contents:
  • the terminal device detects the current working status of the link. For example, the terminal device can detect the current link and determine that the current link fails.
  • the link in this application can be understood as a "beam”, that is, the terminal fails to use the current beam for signal transmission.
  • the terminal device when the terminal device determines that the channel quality information of all or part of the reference signals in the beam failure detection RS or beam failure detection RS set is less than or equal to the link failure detection threshold for N consecutive times, the terminal device can determine that the terminal device and the network device The link between the two has failed.
  • the manner in which the terminal device determines the link failure with the network device is not limited to the above examples, and may also be determined by other judgment methods, which is not limited in this application.
  • the terminal device selects a new link, that is, the terminal device selects a new beam.
  • the terminal device measures the channel quality information of the candidate reference signal set (candidate beam identification RS), and determines the reference signal (new identified beam) whose channel quality is greater than or equal to the second preset threshold according to the channel quality information of the candidate beam identification RS. ), that is, determine the new beam.
  • the terminal device After selecting a new link, the terminal device sends a link failure request message (beam failure recovery request, BFRQ) to the network device, and accordingly, the network device receives the BFRQ sent by the terminal device.
  • a link failure request message (beam failure recovery request, BFRQ)
  • the BFRQ includes the new link selected by the terminal device in step 202.
  • the BFRQ can indicate that the channel quality information recognized by the terminal device is greater than the reference signal information of the link failure recovery threshold.
  • the terminal device can notify the network device of newly identified link information (for example, new beam) or reference signal resources in an explicit or implicit manner.
  • the network device determines a new link according to the new link information included in the BFRQ.
  • the media access control (MAC) layer of the terminal device maintains a timer (beam failure recovery timer) and a counter (beam failure recovery counter).
  • a timer (beam failure recovery timer) is used to control the entire link failure recovery time
  • a counter (beam failure recovery counter) is used to limit the number of times the terminal device sends a link failure recovery request.
  • the network device sends a beam failure recovery response (BFRR) message to the terminal device, and accordingly, the terminal device receives the BFRR sent by the network device.
  • BFRR beam failure recovery response
  • BFRR can be sent according to the new link information or reference signal information indicated by 203.
  • the terminal device detects the DCI in the CORESET sent by the network device.
  • the CORESET can be a dedicated CORESET resource configured by the network device for the terminal device.
  • the network device sends it to The downlink control resource of the link failure response message BFRR of the terminal device.
  • the terminal device receives the BFRR according to the new link information included in the BFRQ. If the terminal device receives the link failure recovery response information, the terminal device determines that the link failure recovery is successful.
  • step 201 may be performed earlier than step 202, and step 201 may be performed simultaneously with step 202.
  • the present application does not limit the time sequence of performing steps 201 and 202.
  • step 202 can be executed earlier than step 203, step 202 can also be executed later than step 203, and step 202 can also be executed simultaneously with step 203.
  • This application treats steps 202 and 203 The time sequence of execution is not limited.
  • the terminal device when the terminal device determines that the link fails, it can recognize new link information or new beam information, and can notify the network device of the new link information to perform link recovery.
  • the terminal device cannot determine a new link or cannot find a new link available in step 202, in other words, the terminal device cannot find a reference signal or a new beam with a channel quality greater than or equal to the second preset threshold (new identified beam). At this time, it will cause the link failure to recover, which will cause the link communication to be interrupted and the communication efficiency to decrease.
  • this application provides a method for link recovery.
  • a terminal device cannot determine a new link or cannot find a new link available, it can be done in an explicit or implicit manner. Indicates that the network device does not recognize the new link, and then performs link recovery in other ways to increase the probability of link failure recovery, and then link recovery reliability.
  • FIG. 3 is a schematic flowchart of an example of a method for link failure recovery provided by an embodiment of the present application.
  • the network device may provide one Pcell and at least one Scell for the terminal device. Taking the link failure between the Scell and the terminal device as an example, the terminal device and the network device are taken as the executive body. Each step of the method 300 is described in detail.
  • the execution subject of the method 300 may also be a chip applied to a terminal device and a chip applied to a network device, which is not limited in this application.
  • the terminal device detects the current working status of the link. For example, the terminal device can detect the current link and determine that the current link fails.
  • this step 301 can refer to step 201 in method 200. Specifically, when the terminal device determines that the beam failure detection RS or the beam failure detection RS set has channel quality information of all or part of the reference signal less than or equal to the first When the threshold is preset, the terminal device can determine that the link between the terminal device and the network device is faulty.
  • the manner in which the terminal device determines the link failure with the network device is not limited to the above examples, and may also be determined by other judgment methods, which is not limited in this application.
  • the terminal device confirms that there is no new link.
  • the terminal device detects the current link and determines that L Scells have link failures. Among them, M Scells do not recognize the new link. In other words, each Scell of the M Scells does not A new link, where L ⁇ M ⁇ 1, and L and M are integers.
  • the terminal device confirms that there is no new link, that is, there is no new usable beam or the first reference signal corresponding to the beam.
  • it is called no new beam state, that is, it is called the first state in this application.
  • the first state is a state in which each of the M first cells does not have a first reference signal that meets a first preset condition, where the first preset condition is used to determine that the M Scells have no first reference signal. A new link is recognized.
  • the terminal device may determine that there is no new link according to one or more of the following methods:
  • the terminal device confirms that the candidate beam list (candidate beam list) is not configured, and the link recovery threshold is configured.
  • the link recovery threshold here may be a preset threshold, and this application does not limit the relationship between the preset threshold and the foregoing first preset threshold and second preset threshold and the channel quality type.
  • the link recovery threshold may be equal to the second preset threshold or the first preset threshold.
  • the preset threshold for example, the first preset threshold, the second preset threshold, or the link recovery threshold
  • the preset threshold can be pre-configured or defined in advance by agreement, and the preset threshold is not configured in this application. Make a limit.
  • the terminal device confirms that the candidate beam list is configured, and the link recovery threshold is not configured.
  • the terminal device confirms that the candidate beam list (candidate beam list) and the link recovery threshold are configured, but the terminal device does not identify a reference signal greater than the link recovery threshold in the candidate beam list.
  • the terminal device confirms that the candidate beam list and the link recovery threshold are not configured. In this case, it can be assumed that there is no new link.
  • the terminal device sends a first request message to the network device.
  • the network device receives the first request message sent by the terminal device.
  • the first request message indicates the cell information of the cell where the link fails.
  • the first request message may be a first link failure request message or scheduling request information, or a combination of the two, which is not limited in this application.
  • the first indication information includes a first part of content and/or a second part of content, where the first part of content is used to indicate one or more cell identifiers where a link failure occurs, and the second part of content It is used to indicate whether each cell where a link failure has recognized a new link.
  • step 302 is an optional step.
  • the network device provides Q SCells for the terminal device (optionally, the Q SCells are SCells that require link failure detection, that is, the network device is configured with Q SCells that require link failure detection)
  • the terminal device determines that the links of the three Scells have failed, and the terminal device reports the identification (ID) of the Scells that failed the three links to the network device.
  • ID the identification of the Scells that failed the link.
  • the identities of the three Scells that failed the link are C1, C2, and C3.
  • the first part of the content may include the identities of the three cells where the link fails, and the second part of the content may include the three cells.
  • the second part of the content can be indicated by several bits of indication information, for example, "000" indicates that the cell identified as C1 did not recognize a new link, and "001" indicates the identification of the cell identified as C1 To a new link, this application does not limit the content of the first indication information.
  • the first part of the content may indicate one or more cell identities where a link failure has occurred, and the maximum number of cells where a link failure has occurred indicated by the first part of the content may be configured by the network device, or It can be reported by the terminal device, the capability of the terminal device can also be reported, or it can be predefined by the protocol.
  • the first indication information can have multiple forms. The following will describe in detail the first indication information in some possible situations, and describe the content of the first part and the second part of this implementation manner by case. Possible resource allocation methods for content.
  • the first part and the second part are carried on one resource.
  • the resource may be a PRACH resource (competitive or non-competitive), a PUCCH resource, or a semi-static PUSCH resource.
  • the first part of content and the second part of content can be mixed mapping (or called mixed coding). It can be understood that the first part of a first cell follows the second part of the first cell.
  • the network device provides 4 Scells (such as C1, C2, C3, C4) that require link failure recovery detection for the terminal device.
  • the terminal device determines that the links of 3 Scells have failed (such as C1, C2, C3), and the terminal device reports the binary status values (such as 00, 01, 10) corresponding to the identifiers of the three Scells that failed to the network device .
  • the identities of the three Scells with failed links are C1, C2, and C3.
  • the first part can include the identities of the 3 cells where the link fails, and the second part can include whether each of the 3 cells has identified For new links, for example, for C1 and C3, no new link is recognized, and for C2, a new link is recognized. For example, "0" indicates that no new link is recognized, and "1" indicates that a new link is recognized.
  • This application does not limit the content of the first indication information. As shown in Table 2 below,
  • the content of the first indication information can be 000011100, where the first three bits indicate the first part of the content (cell ID) and the second part of the content (whether the new link status information is recognized) of the cell where the first link failed ,
  • the middle three bits represent the first part of the content and the second part of the content of the cell where the second link fails, and the same method is used for the following three bits.
  • the first part of the content and the second part of the content can be mapped separately. It can be understood that the first part of the first cell with all link failures follows the second part of the first cell with all link failures.
  • the network device provides terminal equipment with 4 Scells (such as C1, C2, C3, C4), the terminal equipment determines that the link of 3 Scells fails (such as C1, C2, C3), and the terminal equipment corresponds to the binary status value (such as 00, 01, 10) Report to the network device.
  • the identities of the three Scells with failed links are C1, C2, and C3.
  • the first part can include the identities of the 3 cells where the link fails, and the second part can include whether each of the 3 cells has identified For new links, for example, for C1 and C3, no new link is recognized, and for C2, a new link is recognized. For example, "0" indicates that no new link is recognized, and "1" indicates that a new link is recognized.
  • This application does not limit the content of the first indication information. As shown in Table 2, the content of the first indication information can be
  • the first 6 bits indicate the first part of the cell where the first link fails, the first part of the cell where the second link fails, and the first part of the cell where the third link fails; the following 3 A bit indicates the second part of the content.
  • the first bit of the 3 bits corresponds to the second part of the cell where the first link fails, and the second bit corresponds to the second part of the cell where the second link fails.
  • the second part of the content, the third bit corresponds to the second part of the cell where the third link fails.
  • the network device can obtain the cell information of the link failure faster.
  • the first part of the content and the second part of the content can be jointly coded.
  • the first part and the second part are carried on different resources, and/or the first part and the second part are coded independently.
  • the resource may be a PRACH resource (competitive or non-competitive), a PUCCH resource, or a semi-static PUSCH resource.
  • the network device is configured with P1 first resources for carrying the first part of content, and P2 second resources for carrying the second part of content, where P1 ⁇ 1, 1 ⁇ P2 ⁇ P1, and P1 and P2 are integers.
  • the terminal device can implicitly report the identity of the cell where the link fails and or whether the cell where the link fails has identified a new link based on the association relationship between the resources or between the resources and the cells.
  • the P1 first resource can be associated with Q first cells.
  • the P2 second resources may be associated with Q first cells.
  • the P2 second resources may also be associated with the P1 first resources.
  • the terminal device sends the indication information of the first part of the content on one or more of the first resources to indicate that one or more cells corresponding to the one or more first resources have a link failure, and the terminal device determines the After the one or more cells recognize the new link, the second resource corresponding to the one or more cells sends indication information indicating whether the second part of the new link is recognized.
  • the terminal device determines that a link failure occurs in L first cells among the Q first cells, and the terminal device selects at least one resource from the P1 first resources for sending the first part of the content, and the first part of the content indicates the occurrence of the link failure
  • the cell identities or cell group identities of the L first cells For example, if there is a one-to-one correspondence between the P1 first resources and the Q first cells, the terminal device selects L of the P1 first resources that have a corresponding relationship or an association relationship with the L first cells where the link failure occurs.
  • the first resource sends the first part of the content (used to indicate that the L first cells corresponding to the P1 first resources have link failures).
  • the terminal device may select at least one resource from the P2 second resources to send the second part of the content.
  • the second part of the content indicates whether each cell of the L first cells where the link failure occurred has identified the new link. information. For example, if the P2 second resources have a one-to-one correspondence with the Q first cells, the terminal device selects L of the P2 second resources that have a corresponding relationship or an association relationship with the L first cells where the link failure occurs. The second resource sends the second part of the content. For another example, there is a one-to-one correspondence between P2 second resources and L first resources (the association relationship is dynamic, because L first resources are dynamically selected.
  • the agreement stipulates that P2 resources can report the first part to the terminal device
  • the L first resources in the content are sequentially associated)
  • the terminal device selects the L second resources of the P2 second resources that have a corresponding relationship or an association relationship with the L first cells where the link failure occurs and sends the second part content.
  • the network device configures 5 first resources corresponding to cells #1, #2, #3, #4, #5, and 2 second resources; the terminal determines that the cell #1 and #5 are linked Fail, report the first part of the content in the first resource #1 and the first resource #5, report the new link identification of cell #1 in the second resource #1, and report the new link of cell #5 in the second resource #2 Identify the situation.
  • the network device configures a first resource for carrying the first part of content, and a second resource for carrying the second part of content.
  • the terminal device can report the identification of the first cell where the link failure occurs and or the new link identification status of the cell where the link failure occurs in a display manner.
  • the terminal device sends the first part of the content on the one first resource, and sends the second part of the content on the one second resource.
  • the network device configures one first resource for carrying the first part of content, and multiple second resources for carrying the second part of content.
  • the terminal device may report the identification of the first cell where the link failure occurs in a display manner and or implicitly report the identification of the new link of the cell where the link failure occurs.
  • the terminal device sends the first part of the content on the one first resource, and selects at least one resource from the plurality of second resources to send the second part of the content. Among them, how to report the cell identity in an implicit manner is the same as that in Example 1, and will not be repeated here.
  • the network device is configured with multiple first resources to carry the first part of content, and one second resource is used to carry the second part of content.
  • the terminal device can report the identity of the first cell where the link failure occurs in an implicit manner and or report the new link identification status of the cell where the link failure occurs in a display manner.
  • the terminal device selects at least one resource from the plurality of first resources to send the first part of the content, and sends the second part of the content on the one second resource. Among them, how to report the second part of the content in an implicit manner is the same as that in Example 1, and will not be repeated here.
  • the network device can decode the two parts of the content independently, and the resource configuration or coding is more flexible, and a better decoding success rate can be obtained.
  • the number of cells with link failures indicated in the first part of the content changes, then the total number of bits that need to be reported for each cell where the link fails to recognize the new link will also change accordingly. That is, the number of bits in the second part of the content also changes. Therefore, if the first part of content and the second part of content are carried on different resources or coded independently, the network device may not allocate fixed-size resources according to the maximum number of bits, which can reduce resource overhead.
  • first resource and the second resource may be the same resource, and in this case, the content of the first part and the content of the second part are coded independently.
  • the first resource and the second resource may also be different resources.
  • the network device can configure one or more resources for the terminal device, the resource is used to carry the first indication information, the first indication information can indicate whether a link failure occurs in one or more cells, or indicate the link
  • the cell identifier of the failed one or more cells and indicates the new link identification status of each cell of the one or more cells (whether the new link is identified), and the terminal device reports the first indication information to the network device.
  • the network equipment can learn the cell where the link failure occurs and the new link identification status of the cell, so that the network equipment can promptly trigger the new reference signal resource based on the new link identification status of each link failure cell Collection, thereby reducing link failure recovery delay.
  • this method can perform link recovery at the same time, reducing the link failure recovery delay.
  • the first indication information includes a first part of content and a second part of content, where the first part of content is used to indicate a cell identity where a link failure occurs, and the second part of content is used to indicate the cell Whether to recognize the new link.
  • step 302 is an optional step.
  • the network device can decode or parse the first part of content and the second part of content according to this method. That is, decode or parse the second part according to the first part of the content.
  • the second part of the content indicates the identification of a new link (whether the new link is recognized) corresponding to a cell whose link has failed indicated by the first part of the content.
  • the network device is configured with Q SCells (optionally, the Q SCells are SCells that require link failure detection, that is, the network device is configured with Q SCells that require link failure detection), and the terminal device determines If the link of one or one SCell fails, the terminal device reports the identification of one of the three failed SCells to the network device, and identifies the new link of the SCell (information about whether the new link is recognized ) Report to the network device.
  • the first indication information may have various forms. The following will describe in detail the first indication information in some possible situations, and describe the difference between the first part of the content and the second part of the content in this implementation. Possible resource allocation methods.
  • the first part content and the second part content are carried on different resources, and or, the first part content and the second part content are coded independently.
  • the resource may be a PRACH resource (competitive or non-competitive), a PUCCH resource, or a semi-static PUSCH resource.
  • the network device is configured with multiple first resources to carry the first part of content, and one second resource is used to carry the second part of content.
  • the terminal device can implicitly report the identity of a first cell where the link failure occurs, and or report the new link identification status of the first cell where the link failure occurs.
  • the terminal device selects a resource from the plurality of first resources to send the first part of the content (that is, the identity of a first cell where the link fails), and sends the new information of the first cell indicated by the first part of the content on the second resource.
  • Link identification situation that is, the second part of the content. More specifically, the network device may configure P1 first resources for carrying the first part of content, and one second resource for carrying the second part of content, where P1 ⁇ 1, and P1 is an integer.
  • the terminal device can implicitly report a link-failed cell identity based on the association relationship between resources or between resources and cells, and report the link-failed cell based on the link-failed cell identity indicated in the first part. Whether to recognize the new link situation.
  • the P1 first resource can be associated with Q first cells.
  • the network device is configured with 5 first resources corresponding to cells #1, #2, #3, #4, and #5, and 1 second resource; the terminal determines that the link fails in cell #2, The first resource #2 reports the first part of the content, and the second resource reports the new link identification status of the cell #2.
  • the network device For example, for a C1 cell where a link failure occurs, the first part of the content carried by the first resource is used to indicate the identity C1 of the cell, and the second part of the content carried by the second resource is used to indicate that the C1 does not recognize a new link.
  • the network device also configures a first resource for C2. The first part of the content carried by the first resource is used to indicate the identity of the cell C2, and the second part of the content carried by the second resource Used to indicate that the C2 has identified a new link.
  • the network device configures a first resource for carrying the first part of content, and a second resource for carrying the second part of content.
  • the terminal device can report the identification of a first cell with a link failure (that is, the first part of the content) in a display manner, and report the new link identification status of a first cell with the link failure (that is, the second part of the content).
  • the terminal device sends the first part of the content on the one first resource, and sends the second part of the content on the one second resource.
  • the first resource and the second resource may be the same resource.
  • the first part of the content and the second part of the content are coded independently and occupy different bits respectively.
  • the first resource and the second resource may also be different resources.
  • the network device can configure one or more resources for the terminal device, and the resource is used to carry the first indication information.
  • the first indication information indicates the identity of a cell indicating that the link failure has occurred, and information indicating whether the cell in which the link failure has occurred recognizes a new link, and the terminal device reports the first indication information to the network device on the corresponding resource .
  • the network equipment can learn the cell where the link failure occurs and the new link identification status of the cell, so that the network equipment can trigger the new resource set earlier based on the new link identification status of the cell where the link failure occurs, thereby reducing Link failure recovery delay.
  • the network device can configure one or more resources to indicate the cell identity of the link failure, and then configure a resource to indicate the new link identification status of the cell with the link failure; or the terminal device can report through certain bits The identification of a link-failed cell is then reported through another bit to report the identification of the new link of the link-failed cell; it can also be understood that the terminal device determines the content of the second part according to the reported content of the first part. This method can effectively save resource overhead.
  • this method can perform link recovery separately for a cell.
  • the first indication information includes a first part of content and a second part of content, where the first part of content is used to indicate multiple cell identities that have link failures, and the second part of content is used to indicate the Whether all the cells with link failures have not identified a new link.
  • step 302 is an optional step.
  • the second part of the content is used to indicate whether the multiple link failure cells have not identified a new link. It can be understood that when the first part of the content indicates that the multiple link failure cells have no new links. When it is identified, the first state is reported; when at least one new link of the cell whose multiple links have failed indicated by the content of the first part is identified, the second state is reported.
  • the first state here is a state in which each of the M first cells does not have a first reference signal that meets the first preset condition
  • the second state is a state in which each of the M first cells The j-th first cell has a first reference signal state that meets the first preset condition, or the second state is that at least one of the M first cells has a state that meets the first preset condition Condition of the state of the first reference signal.
  • the first state and the second state of the second part of the content can be indicated in the following three ways.
  • Method 1 Through two state values, for example, state value 0 indicates the first state, and state value 1 indicates the second state.
  • Manner 2 Through two resources, for example, sending a signal on one second resource indicates the first state, and sending a signal on another second resource indicates the second state.
  • Manner 3 Sending or not sending a signal on a second resource indicates two states. For example, not sending a signal on the second resource indicates the first state, and sending a signal on the second resource indicates the second state.
  • first state in the first indication information/first request message, or the first state in the second indication information/second request message may also be indicated by method 4.
  • Method 4 Use a special status bit to indicate the first status.
  • the indication information includes 2 bits of information for indicating the reference signal, wherein the lowest state bit of the 2 bits (which may be the 00 state) indicates the first state.
  • Reference signal information Indicated reference signal 00 no beam (no new link) 01 Reference signal #1 10 Reference signal #2 11 Reference signal #3
  • the terminal device determines that the link of 3 Scells fails, and the terminal device reports the identification (ID) of the Scells of the 3 link failures to the network device.
  • ID the identification of the Scells of the 3 link failures.
  • the identities of the three Scells with failed links are C1, C2, and C3.
  • the first part of the content can include the identities of the three cells where the link fails, and the second part can include whether the three cells are None of the new links were recognized. For example, for C1, C2, and C3, none of the new links were recognized. Therefore, the content of the second part is yes, which is used to tell the network equipment that the three Scells that failed the link were not recognized. Create a new link.
  • the first indication information can have multiple forms. The following will describe in detail the first indication information in some possible situations, and describe the content of the first part and the second part of this implementation manner by case. Possible resource allocation methods for content.
  • the network device is configured with multiple first resources to carry the first part of content, and one second resource is used to carry the second part of content.
  • the terminal device can implicitly report the identities of the multiple first cells where the link failure occurs, and or, report whether the corresponding new links of the multiple first cells where the link failure occurs are not identified .
  • the terminal device selects at least two resources from the plurality of first resources to send the first part of the content (that is, the identities of the plurality of first cells where the link fails), and sends the plurality of contents indicated by the first part on the one second resource. Whether the new link of the first cell is not recognized (that is, the second part of the content).
  • the network device may configure P1 first resources for carrying the first part of content, and one second resource for carrying the second part of content, where P1 ⁇ 1, and P1 is an integer.
  • the terminal device can implicitly report the cell identities of multiple link failures according to the association relationship between resources or between resources and cells, and report the multiple links according to the cell identities of the multiple link failures indicated in the first part. Whether the cells where the path fails have not identified the new link.
  • the P1 first resource can be associated with Q first cells.
  • the network device configures 5 first resources corresponding to cells #1, #2, #3, #4, #5, and 1 second resource; the terminal determines that the cell #2 and cell #5 are linked If the path fails, the first part of the content is reported in the first resource #2 and the first resource #5, and the new link identification status of the cell #2 and cell #5 is reported in the second resource (for example, if the new link of cell #2 is not recognized) Link and the new link of cell #5, the status value 0 is reported on the second resource; if at least one of the new link of cell #2 and the new link of cell #5 is identified, it is reported on the second resource Status value 1).
  • the network device configures a first resource for carrying the first part of content, and a second resource for carrying the second part of content.
  • the terminal device can report the identities of the multiple first cells where the link fails (that is, the first part of the content) in a display mode, and report whether the multiple first cells where the link fails have not identified the new link (ie The second part of content).
  • the terminal device sends the first part of the content on the one first resource, and sends the second part of the content on the one second resource.
  • the network device is configured with one first resource (the resource can carry multiple bits of information) and one second resource; the terminal determines that cell #2 and cell #5 have a link failure, and reports on the first resource The identity of the cell #2 and the identity of the cell #5 (that is, the first part of the content), report the identification of the new link of the cell #2 and the cell #5 on the second resource.
  • the resource can carry multiple bits of information
  • the terminal determines that cell #2 and cell #5 have a link failure, and reports on the first resource
  • the identity of the cell #2 and the identity of the cell #5 that is, the first part of the content
  • the first resource reports 0001 and 0100, where 0001 indicates cell #2, and 0100 indicates cell #5; if the new cell #2 is not identified Link and the new link of cell #5, the status value 0 is reported on the second resource; if at least one of the new link of cell #2 and the new link of cell #5 is identified, it is reported on the second resource Status value 1.
  • the first resource and the second resource may be the same resource.
  • the first part of the content and the second part of the content are coded independently and occupy different bits respectively.
  • the first resource and the second resource may also be different resources.
  • the network device configures a corresponding first resource for each Scell, and the first resource is used to carry the first part of the content (that is, the cell identifier indicating one or more link failures); and one The second resource is used to indicate whether all the cells in which one or more links have failed have not identified a new link.
  • the terminal device can send the first part of the content on one or more of the first resources to indicate that one or more cells corresponding to the resource have a link failure; the terminal device is judging whether the one or more cells are all unidentified After the new link is released, the terminal device sends the second part of the content in the second resource or determines whether the second resource configured in the network device sends a signal.
  • the network device is configured to configure a first resource, and the first resource is used to carry the first part of the content (that is, a cell identity indicating one or more link failures); and a second resource is configured It is used to indicate whether all the cells where one or more links have failed have not identified a new link.
  • the terminal device can send the first part of the content on one or more of the first resources to indicate that one or more cells corresponding to the resource have a link failure; the terminal device is judging whether the one or more cells are all unidentified After the new link is released, the terminal device sends the second part of the content in the second resource or determines whether the second resource configured in the network device sends a signal.
  • the network device can configure one resource or multiple resources for the terminal device.
  • the resource is used to carry the first part of the content.
  • the first part of the content can indicate a cell identifier where the link failure occurs, and is the cell where the link failure occurs.
  • Configure a second resource The second resource is used to carry the second part of the content.
  • the second part of the content can indicate whether all the cells where the link fails have not recognized the new link, and will include the first part and the first part.
  • the first instruction information of the two parts is reported to the network device.
  • the network equipment can learn the overall situation of the multiple cells where the link failure occurs and the new link identification of the multiple cells, so that the network equipment can timely identify the new link of the multiple cells where the link failure occurs. In this case, a new resource set is triggered earlier, thereby reducing link failure recovery delay.
  • this implementation method configures a second resource for multiple Scells with link failures, and reports whether all Scells with link failures are not identified
  • the indication information of the new link can save resource overhead.
  • multiple cells due to link failure share one second resource to indicate the second part of content, or multiple cells due to link failure share one bit to indicate the second part of content, which can effectively save resource overhead.
  • the first resource and the second resource may be a physical uplink control channel (PUCCH).
  • the first request message can be sent to the network device through the PUCCH, which is not limited in this application.
  • the information reported by the display method in Examples 1 to 8 is generally sent through the PUCCH channel or PUSCH channel that can carry multiple bits of information; optionally, it should be understood that the information reported by the implicit method in Examples 1 to 8 Information is generally sent through the PRACH channel or PUCCH channel or some sequence that can carry one bit of information (for better reliability and improved transmission accuracy), and it can also be sent through different time domains/frequency domains of PRACH/PUCCH/PUSCH /Code domain resources are sent.
  • the network device determines, according to the first request information or the first indication information, the cell where the link fails and or the new link identification situation of the cell where the link fails, and generates downlink control information (DCI).
  • DCI downlink control information
  • the network device determines, according to the first request information, the cell where the link fails and or the new link identification situation of the cell where the link fails, and generates the response message of the first request message.
  • the network device generates a response message for the first request message according to the first request information.
  • response message of the first request message may be downlink control information.
  • the response message of the first request message may be used to indicate PUSCH resources.
  • the first request message indicates the first state
  • the DCI is used to indicate the resource set of the second reference signal.
  • the terminal device determines that there is no new link, and reports the identity of the first cell where the link failure occurred to the network device.
  • the network device can reconfigure other reference signal resource sets for the terminal device, that is, reconfigure the terminal device through DCI. Configure the resource set of the second reference signal.
  • the resource set of the second reference signal may include periodic, aperiodic or semi-periodic reference signals, which is not limited in this application.
  • the “resource set of the second reference signal” in the present application may include reference signal resources on the first cell, or may only include reference signal resources on other cells, or may include reference signals and other reference signals of the first cell.
  • Reference signal resources of the cell that is, the resource set of the second reference signal may include reference signal resources of multiple cells). The embodiment of the present application does not limit this.
  • the resource set of the second reference signal may be one resource set or multiple reference signal resource sets.
  • the terminal device sends the second request message on the resource indicated by the DCI.
  • the resource set of the second reference signal may not include a candidate beam list (candidate beam list).
  • the candidate beam list when the candidate beam list is configured, the terminal device has already detected the reference signal in the candidate beam list and confirmed that no new link has been identified. Therefore, the resource set of the second reference signal does not include the resources in the candidate beam list, which can prevent the terminal device from performing detection again, thereby reducing the delay of link recovery.
  • the DCI is sent in a search space set (beam failure recovery search space, BFR search space) and/or a control resource set (CORESET) used to send a communication failure recovery response.
  • a search space set beam failure recovery search space, BFR search space
  • CORESET control resource set
  • the network device in the process of sending the DCI, sends the BFRR search space set and/or the control resource set to send the DCI, and the link recovery process can be continued through the retransmission step to improve the reliability of the link recovery.
  • the DCI is scrambled by the radio network temporary identifier (BFR-RNTI) of the link failure recovery request (beam failure recovery-radio network temporary identifier, BFR-RNTI).
  • BFR-RNTI radio network temporary identifier
  • the DCI sent by the network device to the terminal device is scrambled by BFR-RNTI. After the terminal device receives the scrambled DCI, it can be judged according to the scrambling information that the DCI is used for the link recovery process, which can reduce The detection process of terminal equipment reduces the delay of link recovery and improves the reliability of link recovery.
  • the DCI can also be scrambled by the cell radio network temporary identifier (C-RNTI), or scrambled by the RNTI of other private radio networks.
  • C-RNTI cell radio network temporary identifier
  • the embodiment of this application combines this with Not limited.
  • the "second resource" carrying the response message of the first request message is different from the "second resource” in step 303.
  • step 304 and step 305 may be the same step.
  • the terminal device determines the resource set of the second reference signal according to the DCI sent by the network device, and recognizes the new link information in the resource set of the second reference signal.
  • the terminal device receives the DCI sent by the network device, and the terminal device identifies the new link in the resource set of the second reference signal indicated by the DCI.
  • the terminal device may
  • the reference signal whose channel quality information is greater than or equal to the second preset threshold is determined as a new link.
  • the second preset threshold here may be a link recovery threshold or a reconfigured threshold, which is not limited in this application.
  • the second preset threshold may be the first preset threshold.
  • the terminal device sends a second request message to the network device. Accordingly, the network device receives the second request message sent by the terminal device.
  • the second request message includes second indication information.
  • the second indication information is used to instruct the terminal device to identify The status of the new link.
  • the second request message may be a second link failure request message (BFRQ 2).
  • the terminal device determines a new link from the resource set of the second reference signal, and the channel quality information of the new link is greater than or equal to the second preset threshold.
  • the second indication information may include the information of the new link recognized by the terminal device, and is reported to the network device through a second link failure request message (BFRQ 2).
  • the content of the second indication information may be as shown in Table 5 below, where the value of 2bit is used to indicate the identification of the Scell where the link failure occurs, and each Scell where the link failure occurs corresponds to an identification The new link information, such as beam 0, beam1, etc.
  • the information of the new link reported by the second indication information is arranged in descending order according to the ID of the Scell indicated in the first indication information.
  • the network device can also accurately know the new link corresponding to the Scell that failed a certain link. This method can save resource overhead.
  • step 306 the terminal device determines from the resource set of the second reference signal that no new link satisfies the condition, that is, the number of links in the resource set of the second reference signal
  • the second indication information is used to indicate that there is no new link (no new beam state), and is reported to the network device through a second link failure request message (BFRQ 2). Go back and repeat steps 304, 305, and 306 until the terminal device recognizes the new link.
  • the content of the second indication information at this time may be as shown in Table 7 below, where the value of 2bit is used to indicate the identification of the Scell where the link failure occurs.
  • the no beam indication information is reported to indicate that there is no new link.
  • a link failure recovery timer beam failure recovery timer
  • a link failure recovery counter beam failure recovery counter
  • monitor Specifically, when the terminal device determines that the number of times the no new beam state is greater than or equal to the maximum value of the link failure recovery counter and still does not receive BFRR, it is considered that the link recovery has failed; or the terminal device starts to start link recovery for longer than Or equal to the recovery time of the recovery timer, it can be considered that the link recovery has failed, and stop sending the link failure recovery request message (BFRQ) and/or the timing of the link failure recovery timer and the link failure recovery counter. count.
  • BFRQ link failure recovery request message
  • the terminal device determines from the resource set of the second reference signal that no new link meets the condition, that is, the channel quality information of all links in the resource set of the second reference signal is less than the second preset
  • the second indication information is used to indicate at least one first reference signal, and is reported to the network device through a second link failure request message (BFRQ 2).
  • the terminal device determines from the resource set of the second reference signal that no new link meets the condition, that is, the channel quality information of all links in the resource set of the second reference signal is less than the second preset
  • the second indication information is used to indicate at least one second reference signal, and is reported to the network device through a second link failure request message (BFRQ 2).
  • the terminal device determines from the resource set of the first reference signal that no new link meets the condition, that is, the channel quality information of all links in the resource set of the first reference signal is less than the first preset
  • the second indication information is used to indicate at least one second reference signal, and is reported to the network device through a second link failure request message (BFRQ 2).
  • the terminal device can report at least one first link through the second indication information.
  • Reference signal The reported at least one first reference signal is a reference signal with good channel quality in the original set. At this time, the channel quality of the reported at least one first reference signal may be greater than, equal to, or less than the second preset threshold.
  • the content included in the first request message in step 303 and the second request message in step 307 are independent codes.
  • the first request message in step 303 and the second request message in step 307 may be the same request message or different request messages.
  • the first instruction information and the second instruction information may be sent to the network device through the same request message, or sent to the network device through different request messages.
  • the first request message in step 303 and the second request message in step 307 may be sent through the same channel or through different channels, which is not limited in this application.
  • the terminal device may send the first request message to the network device through the first resource, receive the DCI sent by the network device through the second resource, and receive the response message of the second request message on the third resource.
  • the first resource may be a physical uplink shared channel (physical uplink shared channel, PUSCH), which is not limited in this application.
  • the "second resource” may be different from the “second resource” in step 303.
  • the terminal device reports the information of the K second reference signals in the second reference signal resource set on the preset fourth resource, and the second reference signal
  • the reference signal resource set is the default resource set or the preset resource set; if the first indication information indicates the second state, the terminal device reports the Kth in the first reference signal resource set on the preset fourth resource A reference signal information.
  • the preset fourth resource may be a resource associated with the first resource and or the second resource.
  • the configuration information of the fourth resource is composed of broadcast channel, system message, updated system message, one type of signaling among layer one signaling (DCI), high layer signaling (such as RRC or MAC-CE), or multiple signaling The combined signaling configuration.
  • the association relationship between the fourth resource and the first resource/second resource may be through broadcast channels, system messages, updated system messages, layer one signaling (DCI), high-layer signaling (radio resource control, RRC) signaling or media access control element (medium access control-control element, MAC-CE) signaling) of one type of signaling or a combined signaling configuration composed of multiple types of signaling.
  • DCI layer one signaling
  • RRC radio resource control
  • MAC-CE media access control element
  • steps 304/305/306 may not be executed.
  • the terminal device when the first indication information is used to indicate that the terminal device does not recognize the new link, the terminal device does not generate the second indication information and does not send the second indication information, but waits for the network device to send
  • the QCL used to reconfigure the resource set for link recovery can improve the probability of recovery after link failure.
  • the terminal device when the first indication information indicates that the terminal device recognizes a new link, the terminal device generates second indication information, sends the second indication information, and reports the identified new link to the network device.
  • the reference signal indicated by the second indication information may be an aperiodic/periodic/half-periodic reference signal resource set (Second Reference Signal Resource Set), etc., or a certain default reference signal resource set (for example, a reference signal resource set for beam management BM, or a reference signal resource set for RRM measurement, or multiplexing other functions A certain reference signal resource set of ); otherwise, when the first indication information indicates that the terminal device recognizes a new link, the reference signal corresponding to the second indication information is the corresponding reference signal in the candidate beam list.
  • aperiodic/periodic/half-periodic reference signal resource set for example, a reference signal resource set for beam management BM, or a reference signal resource set for RRM measurement, or multiplexing other functions A certain reference signal resource set of .
  • the network device determines new link information according to the second indication information or the second request message.
  • the network device sends a link failure recovery response message (BFRR) to the terminal device, and accordingly, the terminal device receives the link failure recovery response message (BFRR).
  • BFRR link failure recovery response message
  • the terminal device detects the link failure recovery response message (BFRR), and confirms that the link recovery is successful.
  • BFRR link failure recovery response message
  • the terminal device detects BFRR according to the information of the new link included in the second indication information fed back in step 307. If the terminal device detects BFRR, it is considered that the link failure recovery is successful; if the terminal device does not detect BFRR, the terminal device can re-execute the process of steps 303-307 until the link failure recovery is successful.
  • monitoring can be performed through a link failure recovery timer (beam failure recovery timer) and a link failure recovery counter (beam failure recovery counter). Specifically, when the number of times the terminal device sends the link failure recovery request is greater than or equal to the maximum value of the link failure recovery counter, or the link failure recovery time exceeds the preset time period, it is considered that the link failure recovery has failed.
  • a link failure recovery timer beam failure recovery timer
  • a link failure recovery counter beam failure recovery counter
  • the "cell identity" can also be replaced with a "cell index”.
  • the reference signal information may include reference signal index/SSB index and or reference signal quality/SSB quality.
  • the terminal device when a link failure occurs for link recovery, if the terminal device determines that the new link is not recognized, the terminal device can identify the cell where the link failure occurred and or whether each cell recognizes the new link The information is reported to the network device, and the network device can reconfigure a new resource set based on the information, and notify the terminal device of the new resource set through downlink control information.
  • the network device can reconfigure a new resource set based on the information, and notify the terminal device of the new resource set through downlink control information.
  • the network device can reconfigure a new resource set based on the information, and notify the terminal device of the new resource set through downlink control information.
  • the network device can reconfigure a new resource set based on the information, and notify the terminal device of the new resource set through downlink control information.
  • the network device can reconfigure a new resource set based on the information, and notify the terminal device of the new resource set through downlink control information.
  • the communication system may perform steps 301, 303, 304, 305, 306, and 307 without performing 302; or, it may also perform steps 301, 303 without performing intermediate steps or performing subsequent steps; and Alternatively, steps 301, 303, and 307 can also be performed without performing intermediate steps; or, one or more of the above steps can also be performed, or all steps can be performed.
  • the terminal device can detect DCI information on the second cell and determine a new reference signal resource set. If the terminal device confirms that there is a new link, it can be based on the new link in the first cell. Detection response information on a cell.
  • FIG. 4 is a schematic flowchart of another example of a method for link failure recovery provided by an embodiment of the present application. Taking the link failure between the Scell and the terminal device as an example, taking the terminal device and the network device as the execution subject, each step of the method 400 is described in detail.
  • the execution body of the method 400 may also be a chip applied to a terminal device and a chip applied to a network device, which is not limited in this application.
  • the terminal device detects the current working status of the link. For example, the terminal device can detect the current link and determine that the current link fails.
  • the terminal device confirms that there is no new link.
  • the terminal device sends a first request message to the network device. Accordingly, the network device receives the first request message sent by the terminal device.
  • the first request message includes first indication information, and the first indication information is used to indicate that the terminal device has no New link.
  • the network device determines, according to the first indication information, the cell where the link failure occurs and the new link identification situation of the cell.
  • the network device sends a transmission configuration indicator (transmission configuration indicator, TCI) to the terminal device, and accordingly, the terminal device receives the TCI sent by the network device.
  • TCI transmission configuration indicator
  • the terminal device when the network device determines that the M Scells are in a state where no new link is recognized, the terminal device does not detect the link failure recovery response message (BFRR), but waits for the TCI reconfiguration signaling. If the TCI reconfiguration signal is received With signaling, it can be considered that the link failure recovery is successful, and the link failure recovery clock timing is stopped.
  • BFRR link failure recovery response message
  • the terminal device receives the TCI reconfiguration signaling before the link failure recovery clock times out, if it receives this information, it stops the link failure recovery clock timing, otherwise if the link failure recovery time exceeds the preset time, the link is considered Failure recovery failed.
  • the terminal device After confirming that the link failure cell cannot identify a new link, the terminal device does not need to detect the link failure recovery response information, but waits for the TCI reconfiguration signaling with low power consumption, which can save power. .
  • the first cell may be an Scell
  • the second cell may be a Pcell or an Scell with uplink resources.
  • FIG. 5 shows a schematic block diagram of an apparatus 500 for link failure recovery according to an embodiment of the present application.
  • the apparatus 500 may correspond to the terminal equipment described in the above methods 300 and 400, or may be a chip or component applied to the terminal equipment.
  • each module or unit in the device 500 is used to execute each action or processing procedure performed by the terminal device in the above-mentioned methods 300 and 400, as shown in FIG. 5, the communication device 500 may include: a processing unit 510 and a communication unit 520.
  • the processing unit 510 is configured to determine that the M first cells in which link failures have occurred are in the first state, where the first state is that each of the M first cells does not meet the first preset condition
  • the state of the first reference signal, M ⁇ 1, and M is an integer.
  • the communication unit 520 is configured to send a first request message on a first resource, where the first request message is used to indicate cell information of the M first cells.
  • the communication unit 520 is further configured to receive a response message of the first request message on a second resource, where the response message of the first request message is used to indicate a resource set of a second reference signal, and the second reference signal
  • the resource set of includes N resources for restoring the second reference signals of the M first cells, N ⁇ 1, and N is an integer.
  • the processing unit 510 is further configured to determine the resource set of the second reference signal according to the response message of the first request message.
  • the processing unit 510 is used to execute steps 301, 302, and 306 in the method 300 and steps 401, 402, and 406 in the method 400
  • the communication unit 520 is used to execute steps 303, 305, 307, and 309 in the method 300 and methods.
  • the specific processes of 403 and 405 of each unit performing the above corresponding steps have been described in detail in the method 400, and for the sake of brevity, details are not repeated here.
  • FIG. 6 shows a schematic block diagram of an apparatus 600 for link failure recovery according to an embodiment of the present application.
  • the apparatus 600 may correspond to (for example, be applied to or be itself) the base station described in the above method 300 and method 400, and ,
  • Each module or unit in the device 600 is used to execute each action or process performed by the base station in the method 300 and the method 400, as shown in FIG. 6,
  • the communication device 600 may include: a processing unit 610 and a communication unit 620 .
  • the communication unit 620 is configured to receive a first request message on a first resource, where the first request message is used to indicate cell information of M first cells where a link failure occurs, and the M first cells are the first A state, wherein the first state is a state in which each of the M first cells does not have a first reference signal that meets a first preset condition, M ⁇ 1, and M is an integer.
  • the processing unit 610 is configured to determine cell information of the M first cells according to the first request message.
  • the communication unit 620 is further configured to send a response message of the first request message on a second resource, where the response message of the first request message is used to indicate a resource set of a second reference signal, and the second reference signal
  • the resource set of includes N resources for restoring the second reference signals of the M first cells, N ⁇ 1, and N is an integer.
  • the processing unit 610 is used to execute 304 and 308 in the method 300 and 404 in the method 400
  • the communication unit 620 is used to execute 303, 305, 307, and 309 in the method 300, and 403 in the method 400.
  • the specific process of each unit performing the above corresponding steps has been described in detail in the method 300 and the method 400, for the sake of brevity, it will not be repeated here.
  • FIG. 7 is a schematic structural diagram of a terminal device 700 provided by an embodiment of the present application.
  • the terminal device 700 includes a processor 710 and a transceiver 720.
  • the terminal device 700 further includes a memory 730.
  • the processor 710, the transceiver 720 and the memory 730 communicate with each other through an internal connection path to transfer control and/or data signals.
  • the memory 730 is used to store computer programs, and the processor 710 is used to call from the memory 730. And run the computer program to control the transceiver 720 to send and receive signals.
  • the foregoing processor 710 and the memory 730 may be combined into one processing device, and the processor 710 is configured to execute the program code stored in the memory 730 to implement the function of the terminal device in the foregoing method embodiment.
  • the memory 730 may also be integrated in the processor 710 or independent of the processor 710.
  • the transceiver 720 may be implemented by a transceiver circuit.
  • the above-mentioned terminal equipment may also include an antenna 740 for sending uplink data or uplink control signaling output by the transceiver 720 through a wireless signal, or receiving downlink data or downlink control signaling and sending it to the transceiver 720 for further processing.
  • the apparatus 700 may correspond to the terminal device in the method 300 and the method 400 according to the embodiments of the present application, and the apparatus 700 may also be a chip or component applied to a terminal device.
  • each module in the device 700 implements the corresponding processes in the method 300 in FIG. 3 and the method 400 in FIG. 4.
  • the memory 730 is used to store program codes, so that when the processor 710 executes the program codes, The processor 710 is controlled to execute 301, 302, 306 in the method 300 and 401, 402, and 406 in the method 400, and the transceiver 720 is used to execute 303, 305, 307, and 309 in the method 300 and in the method 400.
  • the specific process of each unit performing the above corresponding steps has been described in detail in the method 400, and for the sake of brevity, it will not be repeated here.
  • FIG. 8 is a schematic structural diagram of a network device 800 provided by an embodiment of the present application.
  • the network device 800 (for example, a base station) includes a processor 810 and a transceiver 820.
  • the network device 800 further includes a memory 830.
  • the processor 810, the transceiver 820 and the memory 830 communicate with each other through an internal connection path to transfer control and/or data signals.
  • the memory 830 is used to store computer programs, and the processor 810 is used to call from the memory 830 And run the computer program to control the transceiver 820 to send and receive signals.
  • the foregoing processor 810 and the memory 830 may be combined into one processing device, and the processor 810 is configured to execute the program code stored in the memory 830 to implement the function of the base station in the foregoing method embodiment.
  • the memory 830 may also be integrated in the processor 810 or independent of the processor 810.
  • the transceiver 820 can be implemented by a transceiver circuit.
  • the above-mentioned network equipment may also include an antenna 840 for sending the downlink data or downlink control signaling output by the transceiver 820 through a wireless signal, or receiving uplink data or uplink control signaling and sending it to the transceiver 820 for further processing.
  • the device 800 may correspond to the base station in the method 300 and the method 400 according to the embodiments of the present application, and the device 800 may also be a chip or component applied to a base station.
  • each module in the device 800 implements the corresponding processes in the method 300 in FIG. 3 and the method 400 in FIG. 4.
  • the memory 830 is used to store program codes, so that when the processor 810 executes the program codes, Control the processor 810 to execute 304 and 308 in the method 300 and 404 in the method 400, and the transceiver 820 to execute 303, 305, 307 and 309 in the method 300, and 403 and 405 in the method 400
  • the specific process for each unit to execute the above corresponding steps has been described in detail in the method 400, and for the sake of brevity, it will not be repeated here.
  • the first request message and the second request message may be the same request information, for example, collectively referred to as the first request message.
  • “do not send the second request message” can be understood as “do not send the second indication information”; alternatively, it can be understood that the second indication information is not included in the first request message; or alternatively, it can be understood as the first Only the first indication information is included in the request message.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative, and the division of the units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined.
  • the displayed or discussed mutual coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units.
  • each functional unit in each embodiment of the present application may be integrated into one physical entity, or each unit may correspond to one physical entity alone, or two or more units may be integrated into one physical entity.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

本申请提供了一种链路失败恢复的方法和装置，当发生链路失败进行链路恢复时，如果终端设备确定没有识别出新的链路，通过该方法终端设备可以将发生链路失败的小区标识以及每个小区是否识别到新的链路的信息上报给网络设备，网络设备可以根据该信息重新配置新的资源集合，并将该新的资源集合通过下行控制信息DCI通知给终端设备，换言之，通过DCI触发其他资源集合中的参考信号，并上报该资源集合中的参考信号，用于链路恢复，从而可以提高链路失败恢复概率，减小链路失败恢复时延，提高链路失败恢复可靠性。

Description

链路失败恢复的方法和装置
本申请要求于2019年04月10日提交中国专利局、申请号为201910286536.7、申请名称为“链路失败恢复的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及通信领域中一种链路失败恢复的方法和装置。
背景技术
在终端设备和网络设备的通信过程中，终端设备需要检测可用波束，并将可用波束的信息传输给网络设备，建立链路连接。当终端设备在检测到链路故障(波束失败)时，可以向网络设备发送波束失败恢复请求消息(beam failure recovery request，BFRQ)，用于告知网络设备链路失败，并将检测的新的可用波束信息上报给网络设备，网络设备向终端设备发送波束失败恢复响应消息(beam failure recovery response，BFRR)，从而指示终端设备新的链路信息，使得终端设备可以和网络设备建立新的链路连接，从而恢复链路。
如果终端设备无法确定新的链路或者找不到可用波束，会造成链路失败恢复失败，从而使得链路通信中断，通信效率降低。
发明内容
本申请提供了一种链路失败恢复的方法和装置，该方法可以提高链路失败恢复概率，减小链路失败恢复时延，提高链路失败恢复可靠性。
第一方面，提供了一种链路失败恢复的方法，包括：确定发生链路失败的M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；在第一资源上发送第一请求消息，该第一请求消息用于指示该M个第一小区的小区信息；在第二资源上接收该第一请求消息的响应消息，该第一请求消息的响应消息用于指示第二参考信号的资源集合，该第二参考信号的资源集合包括N个用于恢复该M个第一小区的第二参考信号的资源，N≥1，且N为整数；根据该第一请求消息的响应消息，确定该第二参考信号的资源集合。
具体地，在本申请中，终端设备检测当前链路，确定L个第一小区发生链路失败，其中包括识别到新的链路的第一小区和M个没有识别到新链路的第一小区，换言之，该M个第一小区中的每一个第一小区都没有新的链路，其中L≥M≥1，且L、M为整数。即，本申请中第一请求信息用于指示该链路失败的M个第一小区中的每一个第一小区都没有识别到新的链路。第一状态就是指该M个第一小区中的每一个第一小区都没有识别到新的链路的状态。
应理解，该N个第二参考信号的资源可以用于恢复全部的M个小区的链路，或者是用于恢复M个小区中的部分小区的链路，本申请对此不做限定。
可选地，第一请求消息的响应消息可以有很多种。第一种是当对于有新链路的第一小区，第一请求消息指示了新链路的情况，第一请求消息的响应信息为根据该新链路在第三资源上发送的信息(可以是使用该新链路发送的PDCCH)。
第二种是当对于没有新链路的第一小区，该第一请求消息的响应消息可以指示非周期的/周期的/半周期的参考信号资源集合(第二参考信号资源集合)等，或者该第一请求消息的响应消息关联某个默认的参考信号资源集合(例如用于波束管理BM的参考信号资源集合，或者是用于RRM测量的参考信号资源集合，或者是复用其他功能的某个参考信号资源集合)。其中，用于波束管理(beam management,BM)的参考信号资源集合可以是repetition标识为“off”的参考信号资源集合(还可以是repetition标识为”on”的参考信号资源集合)。
应理解，在本实施例中，该第一请求消息的响应消息主要指的是第二种。
还应理解，该第一请求消息的响应消息用于指示第二参考信号的资源集合，可以是该第一请求消息的响应消息显示指示第二参考信号的资源集合。例如：通过高层信令配置第一请求消息的响应消息关联某个参考信号资源集合。还可以是该第一请求消息的响应消息隐示指示第二参考信号的资源集合。例如：该第一请求消息的响应消息默认关联某个参考信号资源集合。该参考信号资源集合可以是用于波束管理BM的参考信号资源集合，还可以是用于RRM测量的参考信号资源集合，还可以是复用其他功能的某个参考信号资源集合。该默认的参考信号资源集合可以是复用其他功能的参考信号资源集合，或者还可以是协议预定义的参考信号资源集合。该第二参考信号的资源集合对应的第二参考信号可以是CSI-RS，还可以是TRS,还可以是SSB等。
可选地，终端设备在该第一请求消息的响应消息指示的上行资源(可以是PUSCH)上上报该第二参考信号的资源集合中某些第二参考信号的信息。
应理解，该第一请求消息可以通过一个或多个请求消息发送，本实施例对此不做限定。此外该第一请求消息可以是链路失败请求消息(BFRQ)，还可以是调度请求信息，还可以是二者的组合消息，本申请对此不做限定。该第一请求消息也可以承载在一个或多个第一资源上，本实施例对此不做限定。该第一请求消息还可以指示M个第一小区的链路失败。
此外，上述第一资源和所述第二资源可以为第二小区上的资源。例如，第一小区可以是Scell，第二小区可以是Pcell。
还应理解，在本申请中，第一预设条件可以指参考信号的信道质量大于或等于第一预设门限，换句话说，没有满足第一预设条件的第一参考信号还可以包括以下情况中的任意一种：(1)没配置第一参考信号资源集合，配置了第一预设门限；(2)配置了第一参考信号资源集合，没配置第一预设门限；(3)配置了第一参考信号资源集合和第一预设门限，没有识别出或没有大于第一预设门限的第一参考信号；(4)第一参考信号资源集合和第一预设门限都没有配置。其中，第一参考信号资源集合可以称为链路失败恢复参考信号资源集合，第一预设门限可以称为链路恢复门限，本申请对此不做限定。
还应理解，本申请中所说的“信道质量”可以为参考信号接收功率(L1-reference signal  received power，L1-RSRP)、信号噪声干扰比(L1-signal to interference plus noise ratio，L1-SINR)、信号噪声干扰比(signal to interference plus noise ratio，SINR)、信道质量指示(channel quality indication，CQI)等中的至少一个。
在本申请中，终端设备在确认没有新链路后可以在第二小区(例如Pcell)上检测DCI信息，确定新的参考信号资源集合；若终端设备确认有新链路后，可以根据新链路在第一小区上检测响应信息，本申请包括但不限于此。
通过上述方案，当发生链路失败进行链路恢复时，如果终端设备确定没有识别出新的链路，终端设备可以将发生链路失败的小区标识以及小区没有识别到新的链路的信息上报给网络设备，网络设备可以根据该信息重新配置新的资源集合，并将该新的资源集合通过第一请求消息的响应消息通知给终端设备，换言之，通过第一请求消息的响应消息指示其他资源集合中的参考信号，并上报该资源集合中的参考信号，用于链路恢复，从而可以提高链路失败恢复概率，减小链路失败恢复时延，提高链路失败恢复可靠性。
结合第一方面，在某些可能的实现方式中，该M个第一小区的小区信息包括该M个第一小区的小区标识和/或该M个第一小区的第一状态的信息。
应理解，“该M个第一小区的小区信息包括该M个第一小区的小区标识和/或该M个第一小区的第一状态的信息”，可以替换为“该M个第一小区的小区信息包括该M个第一小区的小区标识和该M个第一小区的第一状态的信息，或者该M个第一小区的小区信息包括该M个第一小区的第一状态的信息”，还可以替换为“该M个第一小区的小区信息包括该M个第一小区的小区标识和该M个第一小区的第一状态的信息”，还可以替换为“该第一请求消息用于指示该M个第一小区的小区标识和该M个第一小区的第一状态的信息，或者该第一请求消息用于指示该M个第一小区的第一状态的信息”，还可以替换为“该第一请求消息用于指示该M个第一小区的小区标识和/或该M个第一小区的第一状态的信息”，还可以替换为“该第一请求消息用于指示该M个第一小区的小区标识和该M个第一小区的第一状态的信息”。
应理解，在某些可能的实现方式中，M个第一小区的小区信息仅包括第一状态的信息。也即第一请求消息指示有第一小区发生链路失败(可以不指示是哪个小区发生链路失败，可以指示链路失败的小区范围，如第一组小区中有小区发生链路失败)，以及无法识别链路失败的小区的新链路的状态。相应地，网络设备可以重新配置一些参考信号资源，用于恢复链路。
M个第一小区的第一状态的信息可以理解为，该M个第一小区可以共用一个第一状态，该第一状态指示该M个第一小区中的所有第一小区均没有识别到新链路。还可以理解为，该M个第一小区中的每一个第一小区均有一个第一状态(也即有M个第一状态)，某个小区对应的第一状态指示该第一小区没有识别到新链路。
可选地，对于没有满足第一预设条件的第一参考信号的情况(1)、(2)、(4)中的至少一种情况，网络设备获知此时终端设备无法获得满足第一预设条件的第一参考信号，也即网络设备隐式知道了此时的第一状态，因此终端设备可以只需要(显示或隐式)上报M个第一小区的小区标识，无需上报该M个第一小区的第一状态的信息(或者说第一请求消息隐式指示了M个第一小区的第一状态的信息)。
可选地，对于没有满足第一预设条件的第一参考信号的情况(3)，终端设备至少要 上报M个第一小区的第一状态的消息，以使得网络设备重新配置或指示新的参考信号资源集合，恢复链路。
可以理解地，对于上述几种情况第一请求消息显示或隐式指示了M个第一小区的第一状态的信息。
示例性的，该M个第一小区的小区信息包括M个小区标识和第一状态的信息，该第一状态的信息可以指示该M个Scell没有识别到新的链路。
通过上述实现方式，网络设备可以为链路失败的小区配置一个或多个资源，该资源用于承载第一请求消息，该第一请求消息可以指示是否有小区发生链路失败和或哪些小区发生链路失败。若终端设备没有识别到链路失败的小区的新链路，第一请求消息可以指示链路失败的小区没有识别出新的链路。若网络设备可以获知发生链路失败的小区和/或链路失败的小区的新链路识别情况，使得网络设备可以及时根据发生链路失败的小区的没有新链路被识别的情况，较早触发新的资源集合，从而降低链路失败恢复时延。
结合第一方面和上述实现方式，在某些可能的实现方式中，根据该第一请求消息的响应消息，确定该第二参考信号的资源集合之后，该方法还包括：发送第二请求消息。其中，该第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和或，该第二请求消息用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有满足第二预设门限的用于恢复所述第j个第一小区的第二参考信号的状态，1≤j≤M，且j为整数。
应理解，第二请求消息指示的内容可以有以下情况中的一种或多种：
(1)终端设备在N个第二参考信号中识别到M个第一小区的所有新链路(也可以理解为M个第一小区中的每一个小区都有对应的至少一个新链路)。此时，该第二请求消息可以用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，i可以为1至M中的任意一个值。应理解此时每个小区对应的K的值可以不相等。
(2)终端设备在N个第二参考信号中没有识别到M个第一小区中的任意一个小区的新链路(也可以理解为M个第一小区中的每一个小区都没有对应的新链路被识别)。此时，该第二请求消息用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有满足第二预设门限的用于恢复所述第j个第一小区的第二参考信号的状态，1≤j≤M，且j为整数，j可以为1至M中的任意一个值。
(3)终端设备在N个第二参考信号中识别到M个第一小区中的一部分第一小区的新链路，没有识别到M个第一小区中的另一部分第一小区的新链路(也可以理解为M个第一小区中的一部分小区的新链路被识别出，另一部分小区的新链路没有被识别出)。此时，该第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和该第二请求消息还用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有满足第二预设门限的用于恢复所述第j个第一小区的第二参考信号的状态，1≤j≤M，且j为整数。其中i不等于j。也即该第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息和所述M个第一小区中的第j个第一小区的第一状态的信息。
可选地，终端设备可以在第一请求消息的响应信息指示的上行资源(PUSCH)上发送 第二请求信息。
结合第一方面和上述实现方式，在某些可能的实现方式中，该K个第二参考信号中每个第二参考信号的信道质量大于或等于第二预设门限。
可选地，这里第二预设门限可以是第一预设门限，即链路恢复门限。
结合第一方面和上述实现方式，在某些可能的实现方式中，该方法还包括：根据该K个第二参考信号的信息，在第三资源上接收该第二请求消息的响应消息。
可选地，所述第三资源是第一小区上的资源。具体地，该第三资源可以是Scell上的资源。该第三资源可以是该第i个第一小区上的资源。
结合第一方面和上述实现方式，在某些可能的实现方式中，当该第二请求消息中指示该M个第一小区的第i个第一小区为该第一状态的次数大于或等于预设次数时，确认该第i个第一小区的链路恢复失败。
或者是第一请求消息和第二请求消息中指示的该M个第一小区的第i个第一小区为该第一状态的次数总和大于或等于预设次数时，确认该第i个第一小区的链路恢复失败，1≤i≤M，且i为整数。
换言之，当第一请求信息和/或第二请求信息中指示M个第一小区的第i个第一小区的第一状态等于预设次数，且接收不到第二请求信息的响应信息时，确认第i个第一小区的链路恢复失败。具体地，当终端设备一次或者多次通过第二请求消息上报没有新的链路(no new beam)的次数达到了预设次数，但是还没有接收到第二请求信息的响应信息时，确认第i个第一小区的链路恢复失败。
或者，当第一请求信息和/或第二请求信息中指示M个第一小区的第i个第一小区的第一状态等于预设次数，且接收不到第二请求信息的响应信息时，不发送第i个第一小区的第二请求信息。具体地，当终端设备一次或者多次通过第一请求消息和/或第二请求消息上报没有新的链路(no new beam)的次数达到了预设次数，但是还没有接收到第二请求信息的响应信息时，就可以不再循环发送第二请求消息，默认为链路恢复失败状态。
结合第一方面和上述实现方式，在某些可能的实现方式中，该第一请求消息的响应消息为以下的任意一种：专用搜索空间内的下行控制信息DCI；或专用控制资源集合的DCI；或专用无线网络临时标识RNTI加扰的DCI；或包含预设状态值的DCI。
第二方面，提供了一种链路失败恢复的方法，包括：在第一资源上接收第一请求消息，该第一请求消息用于指示发生链路失败的M个第一小区的小区信息，该M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；根据该第一请求消息，确定该M个第一小区的小区信息；在第二资源上发送该第一请求消息的响应消息，该第一请求消息的响应消息用于指示第二参考信号的资源集合，该第二参考信号的资源集合包括N个用于恢复该M个第一小区的第二参考信号的资源，N≥1，且N为整数。
结合第二方面，在某些可能的实现方式中，该M个第一小区的小区信息包括该M个第一小区的小区标识和/或该M个第一小区的第一状态的信息。
结合第二方面和上述实现方式，在某些可能的实现方式中，该在第二资源上发送该第一请求消息的响应消息之后，该方法还包括：接收第二请求消息，其中，该第二请求消息用于指示恢复该M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M， 1≤K≤N,且i,K为整数，和/或该第二请求消息用于指示该M个第一小区中的第j个第一小区的第一状态的信息，该第一状态为没有用于恢复该第j个第一小区的满足第二预设门限的第二参考信号的状态，1≤j≤M，且j为整数。结合第二方面和上述实现方式，在某些可能的实现方式中，该K个第二参考信号中每个第二参考信号的信道质量大于或等于第二预设门限。
结合第二方面和上述实现方式，在某些可能的实现方式中，该方法还包括：根据该K个第二参考信号的信息，在第三资源上发送该第二请求消息的响应消息。
结合第二方面和上述实现方式，在某些可能的实现方式中，当该第二请求消息中指示该M个第一小区的第i个第一小区为该第一状态的次数大于或等于预设次数时，确认该第i个第一小区的链路恢复失败。
结合第二方面和上述实现方式，在某些可能的实现方式中，该第一请求消息的响应消息为以下的任意一种：专用搜索空间内的下行控制信息DCI；或专用控制资源集合的DCI；或专用无线网络临时标识RNTI加扰的DCI；或包含预设状态值的DCI。
第三方面，提供了一种链路失败恢复的方法，包括：确定L个第一小区链路失败；发送第一请求消息，该第一请求消息包括第一指示信息，该第一指示信息用于指示该L个第一小区的小区信息，L≥1，且L为整数；其中，该第一指示信息包括第一部分内容和/或第二部分内容，该第一部分内容用于指示该L个第一小区的小区标识，该第二部分内容用于指示是否没有满足第一预设条件的第一参考信号。
示例性的，在本申请中，终端设备检测当前链路，确定L个Scell发生链路失败，其中包括识别到新的链路的Scell和M个没有识别到新链路的Scell，换言之，该M个Scell中的每一个Scell都没有新的链路，其中L≥M≥1，且L、M为整数。
通过上述实现方式，网络设备可以为终端设备配置一个或多个资源，该资源用于承载第一指示信息，该第一指示信息可以指示一个或多个小区是否发生链路失败，或者指示链路失败的一个或多个小区的小区标识，并且指示该一个或多个小区的每个小区的新链路识别情况(是否识别出新的链路)，终端设备上报第一指示信息上报给网络设备。网络设备可以获知发生链路失败的小区和该小区的新链路识别情况，使得网络设备可以及时根据每个发生链路失败的小区的新链路识别情况，较早触发新的参考信号的资源集合，从而降低链路失败恢复时延。
结合第三方面，在某些可能的实现方式中，该第二部分内容用于指示该L个第一小区中的每个第一小区是否没有满足第一预设条件的第一参考信号；或者第二部分内容用于指示该L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
或者还可以描述为，该第二部分内容用于指示所述L个第一小区中的每一个第一小区是否有满足第一预设条件的第一参考信号；或者该第二部分内容用于指示该L个第一小区中的所有第一小区是否全都有满足第一预设条件的第一参考信号；或者该第二部分内容用于指示该L个第一小区中的至少有一个第一小区有满足第一预设条件的第一参考信号。
结合第三方面和上述实现方式，在某些可能的实现方式中，该方法还包括：发送第二请求消息，该第二请求消息包括第二指示信息，该第二指示信息用于指示恢复该L个第一小区的参考信号的信息。
或者说，该第二请求消息用于指示恢复该L个第一小区的参考信号的信息。
结合第三方面和上述实现方式，在某些可能的实现方式中，该第二请求消息用于指示恢复该L个第一小区的参考信号的信息包括：该第二请求消息用于指示恢复该L个第一小区中的每一个第一小区的第一状态或者是参考信号的信息。
应理解，第二部分内容用于指示该L个第一小区中至少一个第一小区满足第一预设条件的第一参考信号时，该第二请求消息指示满足第一预设条件的参考信号的信息和没有满足第一预设条件的状态信息。也可以理解为该第二请求消息指示那些识别到新链路的小区对应的参考信号信息，以及没有识别到新链路的小区的第一状态。结合第三方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息独立编码。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述第一请求消息和所述第二请求消息为相同的或者不同的请求消息。换言之，第一指示信息和第二指示信息可以通过同一个或者不同的链路失败请求消息发送。
应理解，在本申请实施例中，第一请求消息和第二请求消息可以是相同的请求信息，例如统一称为第一请求消息。那么“不发送第二请求消息”，可以理解为，“不发送第二指示信息”；或者，可以理解为，第一请求消息中不包括第二指示信息；又或者，可以理解为，第一请求消息中仅包括第一指示信息。
结合第三方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
结合第三方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示第一状态时，不发送该第二请求消息，该第一状态为该L个第一小区中的每个小区都没有满足该第一预设条件的第一参考信号的状态。
应理解，在该实现方式中，当第二部分内容指示链路失败的L个第一小区中的每个小区都没有新的链路时，此时终端设备可以不生成第二请求消息，也不发送该第二请求消息，因为没有任何新的链路信息需要上报给网络设备。
还应理解，该第二部分内容可以指示一部分小区是第一状态，一部分小区是第二状态。对应的第二指示信息包括一部分第一参考信号的信息和一部分第二参考信号的信息。
结合第三方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，该第二指示信息指示恢复该第i个第一小区的第二参考信号的信息，该第一状态为该L个第一小区中的第i个第一小区没有满足该第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
结合第三方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，该第二指示信息用于指示恢复该第j个第一小区的第一参考信号的信息，其中，该第二状态为该L个第一小区中的第j个第一小区有满足该第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数。
应理解，可选地，第二部分内容指示的状态的不同，第二请求消息指示的内容可以有以下情况中的一种或多种：
(1)终端设备没有识别到L个第一小区中的任何一个小区的新链路：也即该第二部分内容指示L个第一小区中的所有第一小区为第一状态时，该第二指示信息指示恢复该L个第一小区的第二参考信号的信息，该第一状态为该L个第一小区中的第i个第一小区没有满足该第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数,i可以为1至L中 的任意一个值。
(2)终端设备识别到L个第一小区中的任何一个小区的新链路：也即该第二部分内容指示L个第一小区中的所有第一小区为第二状态时，该第二指示信息指示恢复该L个第一小区的第一参考信号的信息，该第二状态为该L个第一小区中的第j个第一小区有满足该第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数,j可以为1至L中的任意一个值。
(3)终端设备在N个第二参考信号中识别到M个第一小区中的一部分第一小区的新链路，没有识别到M个第一小区中的另一部分第一小区的新链路(也可以理解为M个第一小区中的一部分小区的新链路被识别出，另一部分小区的新链路没有被识别出)：也即该第二部分内容指示L个第一小区中的第i个第一小区的第一状态和第j个第一小区的第二状态时，该第二指示信息指示恢复该第i个第一小区的第二参考信号的信息和恢复该第j个第一小区的第一参考信号的信息，其中，1≤j≤L，1≤i≤L，i不等于j,i和j为整数。
结合第三方面和上述实现方式，在某些可能的实现方式中，该第二指示信息指示的第w个参考信号对应于该第一部分内容指示的该L个第一小区的第w个小区，1≤i≤L，且w为整数。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：根据所述第二指示信息指示的第i个参考信号，检测所述第一部分内容指示的所述L个第一小区的第i个小区的响应信息，1≤i≤L，且i为整数。
应理解，第三方面中的“第一请求消息”与第一方面中的“第一请求消息”可以不同，第三方面中的“第二请求消息”与第一方面中的“第二请求消息”可以不同。
第四方面，提供了一种链路失败恢复的方法，包括：接收第一请求消息，该第一请求消息包括第一指示信息，该第一指示信息用于指示L个第一小区的小区信息，该L个第一小区为链路失败的小区，L≥1，且L为整数，其中，该第一指示信息包括第一部分内容和/或第二部分内容，该第一部分内容用于指示该L个第一小区的小区标识，该第二部分内容用于指示是否没有满足第一预设条件的第一参考信号；根据该第一请求消息，确定该L个第一小区的小区信息。
结合第四方面，在某些可能的实现方式中，该第二部分内容用于指示该L个第一小区中的每个第一小区是否没有满足第一预设条件的第一参考信号；或者第二部分内容用于指示该L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
结合第四方面和上述实现方式，在某些可能的实现方式中，该方法还包括：发送第二请求消息，该第二请求消息包括第二指示信息，该第二指示信息用于指示恢复该L个第一小区的参考信号的信息。
结合第四方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息独立编码。
结合第四方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
结合第四方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示第一状态时，不发送该第二请求消息，该第一状态为该L个第一小区中的每个小区都没有满足该第一预设条件的第一参考信号的状态。
结合第四方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，该第二指示信息指示恢复该第i个第一小区的第二参考信号的信息，该第一状态为该L个第一小区中的第i个第一小区没有满足该第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
结合第四方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，该第二指示信息用于指示恢复该第j个第一小区的第一参考信号的信息，其中，该第二状态为该L个第一小区中的第j个第一小区有满足该第一预设条件的第一参考信号的状态，1≤≤j≤L，且j为整数。
结合第四方面和上述实现方式，在某些可能的实现方式中，该第二指示信息指示的第i个参考信号对应于该第一部分内容指示的该L个第一小区的第i个小区，1≤i≤L，且i为整数。
应理解，对于本申请介绍的方案，第四方面中的“第一请求消息”与第二方面中的“第一请求消息”可以不同，第四方面中的“第二请求消息”与第二方面中的“第二请求消息”可以不同。
第五方面，提供了一种链路失败恢复的方法，包括：确定M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态；在第一资源上发送第一请求消息，该第一请求消息用于指示该M个第一小区的小区信息，M≥1，且M为整数；接收该第一请求消息的响应消息，该第一请求消息的响应消息用于指示M个第一小区中的至少一个小区的同位置假设(quasi-collocation,QCL)信息。
结合第五方面，在某些可能的实现方式中，接收到该第一请求消息的响应消息后，停止链路失败恢复时钟计时。
应理解，第一方面和第五方面可以结合第三方面，也即第一方面和第二方面可以是第三方面的一部分。
第六方面，提供了一种链路失败恢复的方法，包括：在第一资源上接收第一请求消息，该第一请求消息用于指示发生链路失败的M个第一小区的小区信息，该M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；发送该第一请求消息的响应消息，该第一请求消息的响应消息用于指示M个第一小区中的至少一个小区的QCL信息。
结合第六方面，在某些可能的实现方式中，该第一请求消息的响应消息为传输配置指示(transmission configuration indicator，TCI)。
应理解，第二方面和第六方面可以结合第四方面，也即第二方面和第六方面可以是第四方面的一部分。
第七方面，提供了一种链路失败恢复的装置，包括：处理单元，用于确定发生链路失败的M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；通信单元，用于在第一资源上发送第一请求消息，该第一请求消息用于指示该M个第一小区的小区信息；该通信单元，还用于在第二资源上接收该第一请求消息的响应消息，该第一请求消息的响应消息用于指示第二参考信号的资源集合，该第二参考信号的资源集合包括N个用于恢复该 M个第一小区的第二参考信号的资源，N≥1，且N为整数；该处理单元，还用于根据该第一请求消息的响应消息，确定该第二参考信号的资源集合。
结合第七方面，在某些可能的实现方式中，该M个第一小区的小区信息包括该M个第一小区的小区标识和/或该M个第一小区的第一状态的信息。
结合第七方面和上述实现方式，在某些可能的实现方式中，该通信单元，还用于：发送该第二请求消息；其中，该第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和或，该第二请求消息用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有满足第二预设门限的用于恢复所述第j个第一小区的第二参考信号的状态，1≤j≤M，且j为整数。
结合第七方面和上述实现方式，在某些可能的实现方式中，该K个第二参考信号中每个第二参考信号的信道质量大于或等于第二预设门限。
结合第七方面和上述实现方式，在某些可能的实现方式中，该通信单元还用于：根据该K个第二参考信号的信息，在第三资源上接收该第二请求消息的响应消息。
结合第七方面和上述实现方式，在某些可能的实现方式中，当该第二请求消息中指示该M个第一小区的第i个第一小区为该第一状态的次数大于或等于预设次数时，确认该第i个第一小区的链路恢复失败，1≤i≤M，且i为整数。
结合第七方面和上述实现方式，在某些可能的实现方式中，该第一请求消息的响应消息为以下的任意一种：专用搜索空间内的下行控制信息DCI；或专用控制资源集合的DCI；或专用无线网络临时标识RNTI加扰的DCI；或包含预设状态值的DCI。
第八方面，提供了一种链路失败恢复的装置，包括：通信单元，用于在第一资源上接收第一请求消息，该第一请求消息用于指示发生链路失败的M个第一小区的小区信息，该M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；处理单元，用于根据该第一请求消息，确定该M个第一小区的小区信息；该通信单元，还用于在第二资源上发送该第一请求消息的响应消息，该第一请求消息的响应消息用于指示第二参考信号的资源集合，该第二参考信号的资源集合包括N个用于恢复该M个第一小区的第二参考信号的资源，N≥1，且N为整数。
结合第八方面，在某些可能的实现方式中，该M个第一小区的小区信息包括该M个第一小区的小区标识和/或该M个第一小区的第一状态的信息。
结合第八方面和上述实现方式，在某些可能的实现方式中，该通信单元还用于：接收第二请求消息，其中，该第二请求消息用于指示恢复该M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和/或该第二请求消息用于指示该M个第一小区中的第j个第一小区的第一状态的信息，该第一状态为没有用于恢复该第j个第一小区的满足第二预设门限的第二参考信号的状态，1≤j≤M，且j为整数。
结合第八方面和上述实现方式，在某些可能的实现方式中，该K个第二参考信号中每个第二参考信号的信道质量大于或等于第二预设门限。
结合第八方面和上述实现方式，在某些可能的实现方式中，该通信单元还用于：根据该K个第二参考信号的信息，在第三资源上发送该第二请求消息的响应消息。
结合第八方面和上述实现方式，在某些可能的实现方式中，当该第二请求消息中指示该M个第一小区的第i个第一小区为该第一状态的次数大于或等于预设次数时，确认该第i个第一小区的链路恢复失败。
结合第八方面和上述实现方式，在某些可能的实现方式中，该第一请求消息的响应消息为以下的任意一种：专用搜索空间内的下行控制信息DCI；或专用控制资源集合的DCI；或专用无线网络临时标识RNTI加扰的DCI；或包含预设状态值的DCI。
第九方面，提供了一种链路失败恢复的装置，包括：确定L个小区发生链路失败；发送第一请求消息，该第一请求消息包括第一指示信息，该第一指示信息用于指示该L个第一小区的小区信息，L≥1，且L为整数；其中，该第一指示信息包括第一部分内容和/或第二部分内容，该第一部分内容用于指示该L个第一小区的小区标识，该第二部分内容用于指示是否没有满足第一预设条件的第一参考信号。
结合第九方面和上述实现方式，在某些可能的实现方式中，该第二部分内容用于指示该L个第一小区中的每个第一小区是否没有满足第一预设条件的第一参考信号；或者第二部分内容用于指示该L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
结合第九方面和上述实现方式，在某些可能的实现方式中，该装置还包括：发送第二请求消息，该第二请求消息包括第二指示信息，该第二指示信息用于指示恢复该L个第一小区的参考信号的信息。
结合第九方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息独立编码。
结合第九方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
结合第九方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示第一状态时，不发送该第二请求消息，该第一状态为该L个第一小区中的每个小区都没有满足该第一预设条件的第一参考信号的状态。
结合第九方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，该第二指示信息指示恢复该第i个第一小区的第二参考信号的信息，该第一状态为该L个第一小区中的第i个第一小区没有满足该第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
结合第九方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，该第二指示信息用于指示恢复该第j个第一小区的第一参考信号的信息，其中，该第二状态为该L个第一小区中的第j个第一小区有满足该第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数。
结合第九方面和上述实现方式，在某些可能的实现方式中，该第二指示信息指示的第i个参考信号对应于该第一部分内容指示的该L个第一小区的第i个小区，1≤i≤L，且i为整数。应理解，第九方面中的“第一请求消息”与第七方面中的“第一请求消息”可以不同，第九方面中的“第二请求消息”与第七方面中的“第二请求消息”可以不同。
第十方面，提供了一种链路失败恢复的装置，包括：通信单元，用于接收第一请求消息，该第一请求消息包括第一指示信息，该第一指示信息用于指示L个第一小区的小区信 息，该L个小区为发生链路失败的小区，L≥1，且L为整数，其中，该第一指示信息包括第一部分内容和/或第二部分内容，该第一部分内容用于指示该L个第一小区的小区标识，该第二部分内容用于指示是否没有满足第一预设条件的第一参考信号；处理单元，用于根据该第一请求消息，确定该L个第一小区的小区信息。
结合第十方面和上述实现方式，在某些可能的实现方式中，该第二部分内容用于指示该L个第一小区中的每个第一小区是否没有满足第一预设条件的第一参考信号；或者第二部分内容用于指示该L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
结合第十方面和上述实现方式，在某些可能的实现方式中，该通信单元还用于：发送第二请求消息，该第二请求消息包括第二指示信息，该第二指示信息用于指示恢复该L个第一小区的参考信号的信息。
结合第十方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息独立编码。
结合第十方面和上述实现方式，在某些可能的实现方式中，该第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
结合第十方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示第一状态时，该通信单元不发送该第二请求消息，该第一状态为该L个第一小区中的每个小区都没有满足该第一预设条件的第一参考信号的状态。
结合第十方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，该第二指示信息指示恢复该第i个第一小区的第二参考信号的信息，该第一状态为该L个第一小区中的第i个第一小区没有满足该第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
结合第十方面和上述实现方式，在某些可能的实现方式中，当该第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，该第二指示信息用于指示恢复该第j个第一小区的第一参考信号的信息，其中，该第二状态为该L个第一小区中的第j个第一小区有满足该第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数。
结合第十方面和上述实现方式，在某些可能的实现方式中，该第二指示信息指示的第i个参考信号对应于该第一部分内容指示的该L个第一小区的第i个小区，1≤i≤L，且i为整数。
应理解，第十方面中的“第一请求消息”与第八方面中的“第一请求消息”可以不同，第十方面中的“第二请求消息”与第八方面中的“第二请求消息”可以不同。
第十一方面，提供了一种链路失败恢复的装置，包括：处理单元，用于确定M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态；通信单元，用于在第一资源上发送第一请求消息，该第一请求消息用于指示该M个第一小区的小区信息，M≥1，且M为整数；该通信单元，还用于接收该第一请求消息的响应消息，该第一请求消息的响应消息用于指示M个第一小区中的至少一个小区的同位置假设(quasi-collocation,QCL)信息。
结合第十一方面，在某些可能的实现方式中，所述处理单元，还用于接收到该第一请求消息的响应消息后，停止链路失败恢复时钟计时。
第十二方面，提供了一种链路失败恢复的方法，包括：通信单元，用于在第一资源上接收第一请求消息，该第一请求消息用于指示发生链路失败的M个第一小区的小区信息，该M个第一小区为第一状态，其中，该第一状态为该M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；处理单元，用于根据该第一请求消息，确定该M个第一小区的小区信息；该通信单元，还用于发送该第一请求消息的响应消息，该第一请求消息的响应消息用于指示M个第一小区中的至少一个小区的QCL信息。
结合第十二方面，在某些可能的实现方式中，该第一请求消息的响应消息为传输配置指示(transmission configuration indicator，TCI)。
第十三方面，提供了一种通信装置，该通信装置具有实现上述第一方面、第三方面和第五方面的方法设计中的终端设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第十四方面，提供了一种通信装置，该通信装置具有实现上述第二方面、第四方面和第六方面的方法设计中的网络设备(例如基站)的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第十五方面，提供一种终端设备，包括收发器和处理器。可选地，该终端设备还包括存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行上述第一方面、第三方面和第五方面的任意一种可能的实现方式中的方法。
第十六方面，提供一种网络设备，包括收发器和处理器。可选地，该终端设备还包括存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行上述第二方面、第四方面和第六方面任意一种可能的实现方式中的方法。
第十七方面，提供了一种通信系统，该系统包括上述第七方面、第九方面和第十一方面的终端设备以及第八方面、第十方面和第十二方面的网络设备；或者，该系统包括上述第十五方面的终端设备以及第十六方面的网络设备。
第十八方面，提供一种通信装置，该通信装置可以为上述方法设计中的终端设备，或者为设置在终端设备中的芯片。该通信装置包括：处理器，与存储器耦合，可用于执行存储器中的指令，以实现上述第一方面、第三方面和第五方面任意一种可能的实现方式中终端设备所执行的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。
当该通信装置为终端设备时，该通信接口可以是收发器，或，输入/输出接口。
当该通信装置为配置于终端设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第十九方面，提供了一种通信装置，该通信装置可以为上述方法设计中的网络设备，或者为设置在网络设备中的芯片。该通信装置包括：处理器，与存储器耦合，可用于执行存储器中的指令，以实现上述第二方面、第四方面和第六方面任意一种可能的实现方式中网络设备所执行的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括 通信接口，处理器与通信接口耦合。
当该通信装置为网络设备时，该通信接口可以是收发器，或，输入/输出接口。
当该通信装置为配置于网络设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第二十方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第二十一方面，提供了一种计算机可读介质，所述计算机可读介质存储有程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
附图说明
图1是适用于本申请实施例的移动通信系统的架构示意图。
图2是是一种链路失败恢复方法的示意性流程图。
图3是本申请实施例提供的一例链路失败恢复的方法的示意性流程图。
图4是本申请实施例提供的又一例链路失败恢复的方法的示意性流程图。
图5示出了本申请实施例的一例链路失败恢复的装置的示意性框图。
图6示出了本申请实施例的又一例链路失败恢复的装置的示意性框图。
图7是本申请实施例提供的终端设备的结构示意图。
图8是本申请实施例提供的网络设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、第五代(5th generation，5G)移动通信系统或新无线(new radio，NR)通信系统，例如5G移动通信系统包括包括非独立组网(non-stand alone，NSA)的5G移动通信系统和/或独立组网(stand alone，SA)的5G移动通信系统。本申请实施例的技术方案还可以应用于以及未来的移动通信系统等，例如第六代移动通信系统。
本申请实施例中的终端设备可以指用户设备(user equipment，UE)、接入终端设备、用户单元、用户站、移动站、移动台、远方站、远程终端设备、移动设备、用户终端设备、终端设备、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备可以是全球移动通信(global system for mobile communications，GSM)系统或码分多址(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，也可以是宽带码分 多址(wideband code division multiple access，WCDMA)系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(evoled NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的PLMN网络中的网络设备等，本申请实施例并不限定。
在本申请实施例中，终端设备或网络设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。“制品”可涵盖从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于：磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
图1是适用于本申请实施例的移动通信系统的架构示意图。图1中的通信系统可以包括至少一个终端设备(例如终端设备10、终端设备20、终端设备30、终端设备40、终端设备50和终端设备60)和网络设备70。网络设备70用于为终端设备提供通信服务并接入核心网，终端设备可以通过搜索网络设备70发送的同步信号、广播信号等接入网络，从而进行与网络的通信。图1中的终端设备10、终端设备20、终端设备30、终端设备40和终端设备60可以与网络设备70进行上下行传输。例如，网络设备70可以向终端设备10、终端设备20、终端设备30、终端设备40和终端设备60发送下行信号，也可以接收终端设备10、终端设备20、终端设备30、终端设备40和终端设备60发送的上行信号。
此外，终端设备40、终端设备50和终端设备60也可以看作一个通信系统，终端设备60可以向终端设备40和终端设备50发送下行信号，也可以接收终端设备40和终端设备50发送的上行信号。
需要说明的是，本申请实施例可以应用于包括一个或多个网络设备的通信系统中，也可以应用于包括一个或多个终端设备的通信系统中，本申请对此不进行限定。
为方便理解本申请，下面介绍与本申请相关的术语：
1、控制资源集合(control resource set，CORESET)
为了提高终端设备盲检控制信道的效率，NR标准制定过程中提出了控制资源集合的 概念。网络设备可为终端设备配置一个或多个资源集合，用于发送物理下行控制信道(physical downlink control channel，PDCCH)。网络设备可以在终端设备对应的任一控制资源集合上，向终端设备发送控制信道。此外，网络设备还需要通知终端设备所述控制资源集合的相关联的其他配置，例如搜索空间集合等。每个控制资源集合的配置信息存在差异，例如频域宽度差异、时域长度差异等。可扩展地，本申请中的控制资源集合可以是5G移动通信系统定义的CORESET或控制区域(control region)或增强物理下行控制信道(enhanced-physical downlink control channel，ePDCCH)集合(set)。
PDCCH所占用的时频位置可以称之为下行控制区域。在LTE中，PDCCH始终位于一个子帧的前m个(m可能的取值为1、2、3和4)符号。应注意，LTE中E-PDCCH和R-PDCCH的位置未处于前m个符号。
在NR中，下行控制区域可以由RRC信令通过控制资源集合(control resource set，CORESET)和搜索空间集合(search space set)灵活配置：
控制资源集合可配置PDCCH或控制信道单元(control channel element，CCE)的频域位置，时域的持续符号数(最大值为3)等信息；
搜索空间集合可配置PDCCH的检测周期以及偏移量，在一个时隙内的起始符号等信息。
例如，搜索空间集合可配置PDCCH周期为1个时隙，而时域起始符号为符号0，则终端设备可以在每个时隙的起始位置检测PDCCH。
2、同位置假设(quasi-collocation，QCL)信息
准共站/准共址QCL假设信息也可以称为QCL信息，QCL信息用于辅助描述终端设备接收波束赋形信息以及接收流程。
QCL信息用于指示两种参考信号之间的QCL关系，其中目标参考信号一般是可以是解调参考信号(demodulation reference signal，DMRS)，信道状态信息参考信号(channel state information reference signal，CSI-RS)等，而被引用的参考信号或者源参考信号一般可以是CSI-RS、追踪参考信号(tracking reference signal，TRS)、同步信号广播信道块(synchronous signal/PBCH block，SSB)，探测参考信号(sounding reference signal,SRS)等。
应理解，满足QCL关系的两个参考信号或信道的空间特性参数是相同的，从而基于该源参考信号资源索引可推断出目标参考信号的空间特性参数。
还应理解，满足空间相关性信息的两个参考信号或信道的空间特性参数是相同的，从而基于该源参考信号资源索引可推断出目标参考信号的空间特性参数。
其中，空间特性参数包括以下参数中的一种或多种：
入射角(angle of arrival，AoA)、主(dominant)入射角AoA、平均入射角、入射角的功率角度谱(power angular spectrum，PAS)、出射角(angle of departure，AoD)、主出射角、平均出射角、出射角的功率角度谱、终端设备发送波束成型、终端设备接收波束成型、空间信道相关性、网络设备发送波束成型、网络设备接收波束成型、平均信道增益、平均信道时延(average delay)、时延扩展(delay spread)、多普勒扩展(Doppler spread)、多普勒频移(doppler shift)、空间接收参数(spatial Rx parameters)等。
这些空间特性参数描述了源参考信号与目标参考信号的天线端口间的空间信道特性， 有助于终端设备根据该QCL信息完成接收侧波束赋形或接收处理过程。应理解，终端设备可以根据QCL信息指示的源参考信号的接收波束信息，接收目标参考信号；这些空间特性参数还有助于终端设备根据该空间相关信息完成发射侧波束赋形或者发射处理过程，应理解，终端设备可以根据空间相关信息指示的源参考信号的发射波束信息，发射目标参考信号。
其中，为了节省网络设备对终端设备的QCL信息指示开销，作为一种可选的实施方式，网络设备可以指示PDCCH或物理下行共享信道(physical downlink shared channel，PDSCH)的解调参考信号与终端设备之前上报的多个参考信号资源中的一个或多个是满足QCL关系的，例如，该参考信号可以是CSI-RS。这里，每一个上报的CSI-RS资源索引对应了一个之前基于该CSI-RS资源测量时建立的一个收发波束对。应理解，满足QCL关系的两个参考信号或信道的接收波束信息是相同的，该终端设备可以根据该参考信号资源索引推断出接收PDCCH或PDSCH的接收波束信息。
现有标准中定义了四种类型的QCL，网络设备可以同时给终端设备配置一个或多种类型的QCL，如QCL type A+D，C+D：
QCL types A：Doppler shift，Doppler spread，average delay，delay spread
QCL types B：Doppler shift，Doppler spread
QCL types C：average delay，Doppler shift
QCL types D：Spatial Rx parameter
在本申请的举例中，某些参数的对应关系也可以应用于QCL描述下的场景。
应理解，本申请中适用于QCL假设的场景，也可以是两个参考信号，进一步或者是传输对象间的关联关系。
应理解，本申请中对于上行信号的发送有类似的概念，如spatial relation信息，该空间相关信息用于辅助描述终端设备发射侧波束赋形信息以及发射流程。
spatial relation信息用于指示两种参考信号之间的空间发送参数关系，其中目标参考信号一般是可以是DMRS，SRS等，而被引用的参考信号或者源参考信号一般可以是CSI-RS、SRS、SSB等。
3、传输配置指示(transmission configuration indicator，TCI)状态
TCI用于指示PDCCH/CORESET或者是PDSCH的QCL信息。TCI信息是指TCI中包括的参考信号与PDCCH/PDSCH的DMRS满足QCL关系，主要用于指示接收PDCCH/PDSCH时，其空间接收参数等信息与TCI中包括的参考信号的空间接收参数等信息相同，相似，相近。
一个TCI状态(TCI state)可以包含一个或两个被引用的参考信号，及所关联的QCL类型(QCL type)。QCL类型又可以分为A/B/C/D四个类别，分别是{Doppler shift，Doppler spread，average delay，delay spread，spatial Rx parameter}的不同组合或选择。TCI状态包括QCL信息，或者TCI状态用于指示QCL信息。
4、同步信号广播信道块(synchronous signal/PBCH block，SS/PBCH block)
SS/PBCH block还可以称为SSB。其中，PBCH为物理广播信道(physical broadcast channel)的缩写。SSB包含主同步信号(primary synchronization signal，PSS)、辅同步信号(secondary synchronization signal，SSS)和PBCH中的至少一个。主要用于小区搜索、 小区同步、承载广播信息的信号。
5、小区载波相关概念：
载波聚合(carrier aggregation，CA)：
通过将多个连续的或非连续的单元载波聚合成更大的带宽(例如，达到100MHz)，从而满足3GPP对带宽的需求。
单元载波(component carrier，CC)：
多载波聚合中的每个载波都可以称为“CC”，每个载波由一个或多个物理资源块(physical resource block，PRB)组成，每个载波上可以有各自对应的物理下行控制信道(physical downlink control channel，PDCCH)，调度各自CC的物理下行控制信道(physical downlink control channel，PDSCH)；还可以没有PDCCH，而是通过其他CC上的PDCCH调度PDSCH。终端设备可以在多个CC上接收数据时，又可以称为分量载波，组成载波，或成员载波等。
主小区(primary cell，Pcell)：
Pcell是CA的终端设备驻留的小区，CA的终端设备对应物理上行控制信道(physical uplink control channel，PUCCH)，一般只有Pcell才有PUCCH。
辅助主小区(primary secondary cell，PScell)：
PScell是主基站(master eNodeB，MeNB)通过RRC连接信令配置给DC UE的在辅基站(secondary eNodeB，SeNB)上的一个特殊辅小区。
辅小区(secondary cell，Scell)：
Scell是指通过RRC连接信令配置给CA的终端设备的小区，工作在SCC(辅载波)上，可以为CA终端设备提供更多的无线资源。SCell可以只有下行，也可以上下行同时存在。
特殊小区(special cell，Spcell)：
对于双连接(dual connectivity，DC)场景，Spcell指主小区组(master cell group，MCG)的Pcell或者辅小区组(secondary cell group，SCG)的PScell；否则，如CA场景，Spcell指Pcell。
MCG/SCG：
MCG是指主基站中为终端设备提供服务的小区所在的组为主小区组。在双连接模式下，MeNB关联的一组服务小区，包括Pcell和一个或多个Scell。
SCG是指辅基站中为UE提供服务的小区所在的组为辅小区组。在双链接模式下，包括PSCell和0个或者多个Scell。
MeNB/SeNB：
MeNB是DC终端设备驻留小区所属的基站。
SeNB是MeNB通过RRC连接信令配置给DC UE的另一个基站。
6、波束(beam)：
波束是一种通信资源。波束可以是宽波束，或者窄波束，或者其他类型波束。形成波束的技术可以是波束赋形技术或者其他技术手段。波束赋形技术可以具体为数字波束赋形技术，模拟波束赋形技术，混合数字/模拟波束赋形技术。不同的波束可以认为是不同的资源。通过不同的波束可以发送相同的信息或者不同的信息。可选的，可以将具有相同或 者类似的通信特征的多个波束视为是一个波束。一个波束内可以包括一个或多个天线端口，用于传输数据信道，控制信道和探测信号等，例如，发射波束可以是指信号经天线发射出去后在空间不同方向上形成的信号强度的分布，接收波束可以是指从天线上接收到的无线信号在空间不同方向上的信号强度分布。可以理解的是，形成一个波束的一个或多个天线端口也可以看作是一个天线端口集。
波束可以分为网络设备的发送波束和接收波束，与终端设备的发送波束和接收波束。网络设备的发送波束用于描述网络设备发送侧波束赋形信息，基站接收波束用于描述网络设备接收侧波束赋形信息，终端设备的发送波束用于描述终端设备发送侧波束赋形信息，终端接收波束用于描述终端设备接收侧波束赋形信息。也即波束用于描述波束赋形信息。
波束可以对应时间资源和或空间资源和或频域资源。
可选地，波束还可以与参考信号资源(例如，波束赋形的参考信号资源)，或者波束赋形信息对应。
可选地，波束还可以与网络设备的参考信号资源关联的信息对应，其中参考信号可以为信道状态信息参考信号(channel state information reference signal，CSI-RS)，SSB，解调参考信号(demodulation reference signal，DMRS)、相位跟踪信号(phase tracking reference signal，PTRS)跟踪信号(tracking reference signal,TRS)等，参考信号资源关联的信息可以是参考信号资源标识，或者QCL信息(特别是type D类型的QCL)等。其中，参考信号资源标识对应了之前基于该参考信号资源测量时建立的一个收发波束对，通过该参考信号资源索引，终端可推断波束信息。
可选地，波束还可以与空域滤波器(spatial filter或spatial domain filter)、空域传输滤波器(spatial domain transmission filter)对应。
通信系统通常使用不同种类的参考信号：一类参考信号用于估计信道，从而可以对含有控制信息或者数据的接收信号进行相干解调；另一类用于信道状态或信道质量的测量，从而实现对终端设备的调度。终端设备基于对CSI-RS的信道质量测量得到信道状态信息(Channel State Information，CSI)，所述CSI包括秩指示(rank indicator，RI)，预编码指示(precoding matrix indicator，PMI)，信道质量指示(Channel Quality Indicator，CQI)等中的至少一种。这些CSI信息可由终端设备通过物理上行控制信道或物理上行共享信道发送给基站。
随着智能终端特别是视频业务的出现，当前的频谱资源已经难以满足用户对容量需求的爆炸式增长。具有更大的可用带宽的高频频段特别是毫米波频段，日益成为下一代通信系统的候选频段。另一方面，现代通信系统通常使用多天线技术来提高系统的容量和覆盖或者改善用户的体验，使用高频频段带来的另一个好处就是可以大大减小多天线配置的尺寸，从而便于站址获取和更多天线的部署。然而，与现有LTE等系统的工作频段不同的是，高频频段将导致更大的路径损耗，特别是大气、植被等因素的影响更进一步加剧了无线传播的损耗。
为克服上述较大的传播损耗，一种基于波束赋形技术的信号传输机制被采用，以通过较大的天线增益来补偿信号传播过程中的上述损耗。其中，波束赋形的信号可包括广播信号，同步信号，以及小区特定的参考信号等。
当信号基于波束赋形技术进行传输时，一旦用户发生移动，可能出现传输信号对应的 赋形波束的方向不再匹配移动后的用户位置，从而接收信号频繁中断的问题。为跟踪所述信号传输过程中的赋形波束变化，一种基于波束赋形技术的信道质量测量及结果上报被引入。所述信道质量的测量可以基于波束赋形后的同步信号或小区特定参考信号。相比小区切换，用户在不同赋形波束间的切换更加动态和频繁，因此需要一种动态的测量上报机制。可选地，类似于CSI信息的上报，所述赋形波束的信道质量结果的上报也可由终端设备通过物理上行控制信道或物理上行共享信道发送给基站。
终端设备通过对基站发送的多个波束进行测量选择其较优的N个波束，并将较优的N个波束测量信息上报给基站。波束测量信息也即波束状态信息(beam state information，BSI)，内容主要包括波束索引，波束的参考信号接收功率(reference signal received power，RSRP)。在波束的训练过程中，网络设备对终端设备发送的多个波束进行测量，并且将终端设备发送的多个波束中较优的波束通知给终端设备，例如通过参考信号资源的形式通知给终端设备，如波束索引1。终端设备的接收波束通过QCL中的spatial RX parameter指示，波束状态信息可以描述为L1-RSRP related information。
具体地，波束训练过程包括：
1)最优的N个波束对(beam pair link，BPL)(一个BPL包括一个基站发射波束和一个终端设备接收波束，或者，一个BPL包括一个终端设备发射波束和一个基站的接收波束)的选择。用于终端设备基于网络设备的波束扫描实现对基站发射波束和/或终端接收波束的选择，以及，网络设备基于终端设备的波束扫描实现对终端发射波束和/或基站接收波束的选择。
2)发射波束的更新，该发射波束可以为基站发射波束，也可以为终端设备发射波束。当该发射波束为基站发射波束时，基站通过不同的发射波束向终端设备发送参考信号，终端设备通过同一个接收波束来接收基站通过不同的发射波束发送的参考信号，并基于接收信号确定基站的最优发射波束，然后将基站的最优发射波束反馈给基站，以便于基站对发射波束进行更新。当该发射波束为终端发射波束时，终端设备通过不同的发射波束向基站发送参考信号，基站通过同一个接收波束来接收终端设备通过不同的发射波束发送的参考信号，并基于接收信号确定终端设备的最优发射波束，然后将终端设备的最优发射波束反馈给终端设备，以便于终端设备对发射波束进行更新。其中，上述通过不同的发射波束发送参考信号的过程可以称为波束扫描，基于接收信号确定最优发射波束的过程可以称为波束匹配。
3)接收波束的更新，该接收波束可以为基站接收波束，也可以为终端设备接收波束。当该接收波束为基站接收波束时，终端设备通过同一个发射波束向基站发送参考信号，基站采用不同的接收波束接收终端设备发送的参考信号，然后基于接收信号确定基站的最优接收波束，以对基站的接收波束进行更新。当该接收波束为终端设备的接收波束时，基站通过同一个发射波束向终端设备发送参考信号，终端设备采用不同的接收波束接收基站发送的参考信号，然后基于接收信号确定终端设备的最优接收波束，以对终端设备的接收波束进行更新。
在下行信号的传输中，基站发射波束和终端设备接收波束均可能发生动态变化，终端设备基于接收信号确定的最优接收波束可能包括多个，为了使终端设备确定自身的接收波束，终端设备可以将多个接收波束的信息反馈给网络设备，网络设备可以通过向终端设备 发送波束指示信息来向终端设备指示终端接收波束。当终端设备采用模拟域的波束赋形时，终端设备可以基于网络设备发送的波束指示信息来精确的确定终端接收波束，从而可以节省终端设备的波束扫描时间，达到省电的效果。
通过上述介绍的波束训练过程，基站获得和终端设备通信较优的N个波束对BPL，所述波束对BPL为<Bx，B’x>，其中Bx代表基站的发送波束，B’x代表终端设备的接收波束，以及<By，B’y>，其中By代表终端设备的发送波束，B’y代表基站的接收波束。基站在后续和终端设备通信过程中会采用这N个BPL进行数据传输。但是由于在通信过程中存在遮挡，高频信道下的绕射能力差，导致当前服务的波束被阻挡，信号无法继续传输。为了防止在出现波束被阻挡的情况下，通信被突然中段，需要引入相应的机制对波束质量进行检测，并在发生阻挡的情况下快速恢复链路。
7、检测链路失败及恢复链路失败所配置的参考信号
为了检测和恢复链路故障，网络设备可以给终端设备配置用于波束失败检测的参考信号资源集合(例如，beam failure detection RS resourceconfig或beam failure detection RS或failure detection resources)(也可以称为链路失败检测参考信号资源集合)。网络设备还可以给终端设备配置用于恢复终端设备与网络设备链路的参考信号资源集合(candidate beam RS list或candidate beam RS identification resource或beam failure candidate beam resource或candidate beam identification RS或candidate beam list)(也可以称为候选参考信号资源集合或链路失败恢复参考信号资源集合)。此外用于检测链路失败的参考信号还可以通过隐式方式指示，将指示PDCCH的TCI中关联的参考信号作为检测链路失败的参考信号，该参考信号是与PDCCH的DMRS满足QCL关系的参考信号，且为周期发送的参考信号。其中，beam failure detection RS set中的RS与下行物理控制信道PDCCH的解调参考信号满足QCL关系或者与PDCCH使用相同的TCI状态，当该集合中的部分或者所有参考信号的信道质量信息(如参考信号接收功率(reference signal receiving power，RSRP)，信道质量指示(channel quality indicator，CQI)，块差错率(block error ratio，BLER)，信号与干扰加噪声比(signal to Interference plus noise ratio，SINR)，信噪比(signal noise ratio，SNR)等)低于预定门限，则判定为通信链路故障。其中低于预定门限可以是连续W次低于预定门限或者一定时间段内W次低于预定门限。可选的，该预定门限可以和无线链路失败失步门限(radio link failure OOS(out of sync))相同。该预定门限可以称为链路失败检测门限，还可以称为链路失败门限。应理解，只要是用于链路失败的检测的门限均可以为该预定门限，本发明不对该预定门限的名称做限定。
波束失败后，终端设备需要从候选参考信号资源集合中选出信道质量信息(如RSRP、CQI等)高于预定门限的参考信号资源，用于恢复通信链路。可选的，该预定门限可以由网络设备配置。这里，beam failure detection RS是用于终端检测网络设备的某一发射波束的信道质量，该发射波束是网络设备与该终端进行通信时所使用的波束。Candidate beam identification RS用于终端设备在判断出网络设备的该发射波束发生通信链路故障后，用于发起链路重配的参考信号集合。
应理解，在本申请实施例中，通信失败还可以称为通信链路失败、通信链路故障、链路故障、链路失败、通信故障、波束失败、波束故障等。在本申请实施例中，这些概念是相同的含义。该通信失败可以是指用于PDCCH的波束失败检测的参考信号的信号质量小 于或者等于预设门限。通信链路故障后，终端设备需要从候选参考信号资源集合中选出信道质量信息(如RSRP、RSRQ、CQI、SINR等)高于预定门限的参考信号资源，用于恢复通信链路。
可选的，该预定门限可以由网络设备配置，或者还可以是预定义的门限。例如，当网络设备没有配置该门限时，默认使用用于移动性测量的门限。该预定门限可以称为链路失败恢复门限，还可以称为链路恢复门限。应理解，只要是用于链路失败恢复的门限均可以为该预定门限，本发明不对该预定门限的名称做限定。candidate beam identification RS用于终端设备在判断出网络设备的该发射波束发生通信链路故障后，用于发起链路重配的参考信号集合。
在本申请实施例中，通信失败恢复也可以称为恢复网络设备与终端设备通信，通信故障恢复、链路失败恢复、链路故障恢复、波束失败恢复、波束故障恢复通信链路失败恢复、通信链路故障恢复、链路重配等。
在具体实现中，用于波束失败检测的参考信号资源集合以及用于恢复终端设备与网络设备链路的参考信号资源集合这两个集合的名称还可以有其他叫法，本申请对此不作具体限定。
本申请实施例中，通信失败恢复请求信息又可以称为通信故障恢复请求信息、链路失败恢复请求信息、链路故障恢复请求信息、波束失败恢复请求信息、波束故障恢复请求信息、通信链路失败恢复请求信息、通信链路故障恢复请求信息、链路重配请求信息、重配请求信息等。应理解，本申请实施例中通信失败恢复请求信息可以称为第一请求消息和或第二请求消息和或第三请求消息。
本申请实施例中，通信失败恢复响应信息又可以称为通信失败响应信息、波束失败恢复响应信息、波束失败响应信息、通信链路故障恢复响应信息、通信链路故障响应信息、通信链路失败恢复响应信息、通信链路失败响应信息、波束故障恢复响应信息、波束故障响应信息、链路重配响应信息、链路故障恢复响应信息、链路故障响应信息、链路失败恢复响应信息、链路失败响应信息、通信故障恢复响应信息、通信故障响应信息、重配响应信息等。应理解，本申请中，通信失败恢复响应信息可以简称为响应信息。
本申请实施例中，可选地，通信失败恢复请求可以是指在用于承载通信失败恢复请求的资源上发送信号，通信失败恢复响应信息可以是指在用于发送通信失败恢复响应的控制资源集合和/或搜索空间集合上接收循环冗余校验(cyclic redundancy check，CRC)由小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)加扰的下行控制信息(downlink control information，DCI)，该通信失败恢复响应信息还可以由其他信息加扰的DCI(如BFR-RNTI加扰的DCI)，该通信失败恢复响应信息还可以是由上述DCI调度的数据，该通信失败恢复响应信息还可以是由上述DCI调度的数据的ACK。该通信失败恢复响应信息还可以是以下信息中的一种：小区无线网络临时标识C-RNTI加扰的DCI、调制编码方式小区特定无线网络临时标识MCS-C-RNTI加扰的DCI、专用搜索空间内的下行控制信息DCI、专用无线网络临时标识RNTI加扰的DCI、随机接入无线网络临时标识RA-RNTI加扰的DCI、包含预设状态值的DCI、包含传输配置指示TCI信息的DCI、所述发生链路失败的小区的准共址QCL指示信息或预设格式的DCI，所述预设格式的DCI指示新传数据。本申请实施例对此并不作限定。
应理解，本申请实施例中的通信失败、通信失败恢复、通信失败恢复请求信息和通信失败恢复响应信息的名称还可以有其他叫法，本申请对此不作具体限定。
应理解，本申请中，某小区的链路恢复失败可以理解为终端设备不再发送该小区对应的第一请求信息和/或第二请求信息和/或第三请求信息，也可以理解为停止链路失败恢复时钟计时，也可以理解为停止链路失败恢复计数器计数等。或者某小区的链路恢复失败可以理解为该小区对应的链路失败恢复时钟超时，和或链路失败恢复计数器计数超过最大次数或达到最大次数仍未收到该小区的响应信息。其中，链路失败恢复计数器用于计数链路失败恢复请求信息的发送次数。可选地，终端设备的媒体接入控制(media access control，MAC)层会维护一个链路失败恢复计时器(beam failure recovery timer)和链路失败恢复计数器(beam failure recovery counter)。该链路失败恢复计时器用于控制整个链路失败恢复的时间，该链路失败恢复计数器用于限制该终端设备发送链路失败恢复请求的次数，当链路失败恢复计数器达到最大值时，该终端设备认为链路失败恢复不成功，停止链路失败恢复过程。所述恢复计时器的恢复时间和所述恢复计数器的计数值可以是网络设备配置的，也可以是预设值。
应理解，本申请中，某小区的链路恢复成功可以理解为终端设备检测到该小区的响应信息。
应理解，本申请实施例中的“检测”可以理解为“接收”，还可以理解为“解码”。
应理解，本申请中，时间单元可以是LTE或者5G NR系统中定义的一个或多个无线帧，一个或多个子帧，一个或多个时隙，一个或多个微时隙(mini slot)，一个或多个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号等，也可以是多个帧或子帧构成的时间窗口，例如系统信息(system information，SI)窗口。
应理解，本申请各实施例中“发生链路失败”可以替换为“链路失败”。
应理解，本申请各实施例中“第一状态的信息”可以替换为“第一状态”，或者说“第一状态的信息”与“第一状态”是等同的概念。
应理解，本申请各实施例中“预设门限”可以替换为“预定门限”，或者说“预设门限”与“预定门限”是等同的概念。
应理解，本申请中的“第一参考信号”是第一参考信号的资源集合中对应的参考信号，该第一参考信号的资源集合可以为候选参考信号集合。该第一参考信号的资源集合是用于恢复第一小区的链路的参考信号资源集合。该第一参考信号的资源集合中对应的参考信号可以是第一小区上的参考信号，还可以是其他小区上的参考信号。或者说该第一参考信号的资源集合对应的参考信号资源可以是第一小区上的参考信号资源，还可以是其他小区上的参考信号资源。本申请实施例对此并不作限定。
应理解，本申请各实施中，终端设备与网络设备之间的交互通常是对应的，即终端设备发送信息，相应的网络设备也会接收该信息；或者网络设备发送信息，相应的，终端设备也会接收该信息。进一步的，网络设备与终端设备收发信息所使用的物理资源，或所应用的规则如周期，优先级顺序等也是对应的，本申请各实施例不作限制。
应理解，上述各个术语的定义可以参考现有技术。但随着技术的不断发展，上述定义也有可能发生变化，本申请各实施例不作限制。
图2是一种链路失败恢复方法的示意性流程图。如图2所示，该链路失败恢复方法 200包括以下内容：
201，终端设备检测当前链路的工作状态。例如，终端设备可以检测得到当前链路，确定当前链路失败。
应理解，本申请的链路可以理解为“波束”，即终端采用当前波束进行信号传输失败。
例如，当终端设备判断连续N次beam failure detection RS或者beam failure detection RS set中所有或部分参考信号的信道质量信息小于或等于链路失败检测门限时，该终端设备可以确定该终端设备与网络设备之间的链路发生故障。
应理解，本申请实施例中，该终端设备确定与网络设备之间的链路失败的方式并不限于以上举例，还可以由其他判断方式确定，本申请对此并不作任何限定。
202，终端设备选择新的链路，即终端设备选择新的波束。
例如，该终端设备测量候选参考信号集合(candidate beam identification RS)的信道质量信息，根据该candidate beam identification RS的信道质量信息，确定信道质量大于或者等于第二预设门限的参考信号(new identified beam)，即确定新的波束。
203，在选择新的链路之后，终端设备向网络设备发送链路失败请求消息(beam failure recovery request，BFRQ)，相应地，网络设备接收终端设备发送的BFRQ。
其中，BFRQ包括步骤202中终端设备选择的新的链路，换言之，BFRQ可以指示终端设备识别的信道质量信息大于链路失败恢复门限的参考信号的信息。终端设备可以通过显式或隐式的方式将新识别的链路信息(例如new beam)或参考信号资源通知给网络设备。
相应地，网络设备接收终端设备发送的BFRQ之后，根据BFRQ中包括的新的链路信息确定新的链路。
应理解，在终端设备向网络设备发送BFRQ的过程中，终端设备的媒体介入控制(media access control，MAC)层会维护一个定时器(beam failure recovery timer)和计数器(beam failure recovery counter)。其中，定时器(beam failure recovery timer)用于控制整个链路失败恢复的时间，计数器(beam failure recovery counter)用于限制终端设备发送链路失败恢复请求的次数。当定时器时间到期或者计数器达到最大值时，终端设备认为链路失败恢复不成功，停止该链路失败恢复过程。
204，网络设备向终端设备发送波束失败恢复响应消息(beam failure recovery response，BFRR)，相应地，终端设备接收网络设备发送的BFRR。
其中，BFRR可以根据203指示的新的链路信息或者参考信号的信息进行发送。
终端设备检测网络设备发送的CORESET内的DCI，该CORESET可以是网络设备为终端设备配置的专用的CORESET资源，用于链路失败时，在终端设备发送链路失败请求BFRQ后，网络设备发送给终端设备的链路失败响应消息BFRR的下行控制资源。
终端设备根据BFRQ中包括的新的链路信息接收该BFRR。若终端设备接收到链路失败恢复响应信息，则终端设备确定链路失败恢复成功。
应理解，在上述链路失败恢复方法200中，步骤201可以早于步骤202执行，步骤201还可以和步骤202同时执行，本申请对步骤201和202执行的时间先后顺序不做限定。
还应理解，在上述链路失败恢复方法200中，步骤202可以早于步骤203执行，步骤202也可以晚于步骤203执行，步骤202还可以和步骤203同时执行，本申请对步骤202 和203执行的时间先后顺序不做限定。
以上介绍了在终端设备确定链路失败的情况下，可以识别到新的链路信息或者新的波束信息，可以将新的链路信息通知网络设备，进行链路恢复。但是，如果终端设备在步骤202中，无法确定新的链路或者找不到可用的新链路，换言之，终端设备找不到信道质量大于或者等于第二预设门限的参考信号或者新的波束(new identified beam)。此时，会造成链路失败恢复失败，从而使得链路通信中断，通信效率降低。
为了提高链路恢复的可靠性，本申请提供一种链路恢复的方法，当终端设备无法确定新的链路或者找不到可用的新链路时，可以通过显式或隐式的方式，指示网络设备没有识别出新的链路，再通过其他方式进行链路恢复，提高链路失败恢复概率，进而链路恢复可靠性。
图3是本申请实施例提供的一例链路失败恢复的方法的示意性流程图。
应理解，在本申请实施例的描述中，网络设备可以为终端设备提供一个Pcell、至少一个Scell，以Scell和终端设备之间链路失败为例，以终端设备和网络设备作为执行主体，对方法300的每个步骤进行详细说明。
作为示例而非限定，方法300的执行主体也可以是应用于终端设备的芯片和应用于网络设备的芯片，本申请对此不做限定。
301，终端设备检测当前链路的工作状态。例如，终端设备可以检测得到当前链路，确定当前链路失败。
应理解，该步骤301可参照方法200中的步骤201，具体地，当终端设备判断连续N次beam failure detection RS或者beam failure detection RS set中所有或部分参考信号的信道质量信息小于或等于第一预设门限时，该终端设备可以确定该终端设备与网络设备之间的链路发生故障。
还应理解，本申请实施例中，该终端设备确定与网络设备之间的链路失败的方式并不限于以上举例，还可以由其他判断方式确定，本申请对此并不作任何限定。
302，终端设备确认没有新的链路。
示例性的，在本申请中，终端设备检测当前链路，确定L个Scell发生链路失败，其中有M个Scell没有识别到新链路，换言之，该M个Scell中的每一个Scell都没有新的链路，其中L≥M≥1，且L、M为整数。
应理解，终端设备确认没有新的链路即没有新的可用的波束或者波束对应的第一参考信号，在本申请中，称为no new beam state，即本申请中称为第一状态。可以理解为，该第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，其中第一预设条件用于确定M个Scell没有识别到新的链路。
在一种更可能的实现方式中，终端设备可以根据以下方式中的一种或多种确定没有新的链路：
(1)终端设备确认没有配置候选波束列表(candidate beam list)，配置了链路恢复门限。
应理解，这里链路恢复门限可以为一个预设门限，本申请对该预设门限与前述第一预设门限、第二预设门限的大小关系和信道质量类型不做限定。可选地，该链路恢复门限可以等于第二预设门限或者第一预设门限。
还应理解，本申请中涉及的预设门限(例如第一预设门限、第二预设门限或者链路恢复门限)可以通过预先配置或者协议预先定义，本申请对预设门限的配置方式不做限定。
(2)终端设备确认配置了候选波束列表(candidate beam list)，没有配置链路恢复门限。
(3)终端设备确认配置了候选波束列表(candidate beam list)和链路恢复门限了，但是终端设备在该candidate beam list中没有识别出大于链路恢复门限的参考信号。
(4)终端设备确认候选波束列表(candidate beam list)和链路恢复门限都没有配置。在该种情况中，可以默认为没有新的链路。
303，终端设备向网络设备发送第一请求消息，相应地，网络设备接收终端设备发送的第一请求消息，该第一请求消息指示链路失败的小区的小区信息。
可选地，该第一请求消息可以是第一链路失败请求消息还可以为调度请求信息，还可以是二者的结合信息，本申请对此不做限定。
在一种可能的实现方式中，该第一指示信息包括第一部分内容和/或第二部分内容，其中，第一部分内容用于指示一个或多个发生链路失败的小区标识，第二部分内容用于指示发生链路失败的每个小区是否识别出新的链路。
应理解，在该种实现方式中，步骤302是可选地步骤。
示例性的，假设网络设备为终端设备提供了Q个Scell(可选地，该Q个SCell是需要链路失败检测的SCell，也就是说网络设备配置了需要链路失败检测的Q个SCell)，终端设备确定3个Scell的链路失败，终端设备将该3个链路失败的Scell的标识(identification，ID)上报给网络设备。如下表1所示，3个链路失败的Scell的标识分别为C1、C2和C3，第一部分内容可以包括该链路失败的3个小区的标识，第二部分内容可以包括该3个小区中每一个小区是否识别出新的链路，例如对于C1和C3，没有识别出新的链路，对于C2，识别到新的链路。可选地，第二部分内容可以通过几个比特(bit)的指示信息进行指示，例如“000”指示标识为C1的小区没有识别出新的链路，“001”指示标识为C1的小区识别到新的链路，本申请对第一指示信息的内容不做限定。
表1
Scell的标识(第一部分内容) 是否识别出新的链路(第二部分内容)
C1 no
C2 yes
C3 no
应理解，上述实现方式中，第一部分内容可以指示一个或多个发生链路失败的小区标识，其中第一部分内容指示的发生链路失败的小区个数的最大值可以是网络设备配置的，还可以是终端设备上报的，还可以是终端设备能力上报的，还可以是协议预定义的。
应理解，上述实现方式中，第一指示信息可以具有多种形式，下面将详细描述在某些可能的情况下的第一指示信息，并分情况描述本实现方式中第一部分内容与第二部分内容的可能的资源配置方式。
情况1
第一部分内容与第二部分内容承载在一个资源上。其中，该资源可以是PRACH资源 (竞争的或非竞争的)，还可以是PUCCH资源，还可以是半静态的PUSCH资源等。
其中，第一部分内容与第二部分内容可以混合映射(或者称为可以混合编码)。可以理解为一个第一小区的第一部分内容跟着该第一小区的第二部分内容，例如网络设备为终端设备提供了需要链路失败恢复检测的4个Scell(如C1，C2，C3，C4)，终端设备确定3个Scell的链路失败(如C1，C2，C3)，终端设备将该3个链路失败的Scell的标识对应的二进制状态值(如00，01，10)上报给网络设备。3个链路失败的Scell的标识分别为C1、C2和C3，第一部分内容可以包括该链路失败的3个小区的标识，第二部分内容可以包括该3个小区中每一个小区是否识别出新的链路，例如对于C1和C3，没有识别出新的链路，对于C2，识别到新的链路。例如“0”指示没有识别出新的链路，“1”指示识别到新的链路，本申请对第一指示信息的内容不做限定。如下表2所示，
表2
Scell的标识(第一部分内容) 是否识别出新的链路(第二部分内容)
00 0
01 1
10 0
第一指示信息的内容可以为000011100，其中前三个bit位表示第一个链路失败的小区的第一部分内容(小区标识)和第二部分内容(是否识别出新的链路的状态信息)，中间三个bit位表示第二个链路失败的小区的第一部分内容和第二部分内容，同理对于后面的三个bit位有相同的方法。
其中，第一部分内容与第二部分内容可以分别映射。可以理解为所有链路失败的第一小区的第一部分内容跟着所有链路失败的第一小区的第二部分内容，例如网络设备为终端设备提供了需要链路失败恢复检测的4个Scell(如C1，C2，C3，C4)，终端设备确定3个Scell的链路失败(如C1，C2，C3)，终端设备将该3个链路失败的Scell的标识对应的二进制状态值(如00，01，10)上报给网络设备。3个链路失败的Scell的标识分别为C1、C2和C3，第一部分内容可以包括该链路失败的3个小区的标识，第二部分内容可以包括该3个小区中每一个小区是否识别出新的链路，例如对于C1和C3，没有识别出新的链路，对于C2，识别到新的链路。例如“0”指示没有识别出新的链路，“1”指示识别到新的链路，本申请对第一指示信息的内容不做限定。如表2所示，第一指示信息的内容可以为
000110010，其中前6个bit位指示第一个链路失败的小区的第一部分内容、第二个链路失败的小区的第一部分内容和第三个链路失败的小区的第一部分内容；后面3个bit位指示第二部分内容，其中3个bit位的第一个bit位对应第一个链路失败的小区的第二部分内容，第二个bit位对应第二个链路失败的小区的第二部分内容，第三个bit位对应第三个链路失败的小区的第二部分内容。
通过将第一部分内容与第二部分内容承载在一个资源上，网络设备可以更快的获得链路失败的小区信息。
应理解，情况1中，第一部分内容与第二部分内容可以联合编码。
情况2
第一部分内容与第二部分内容承载在不同资源上，和/或，第一部分内容与第二部分 内容独立编码。其中，该资源可以是PRACH资源(竞争的或非竞争的)，还可以是PUCCH资源，还可以是半静态的PUSCH资源等。
示例一
网络设备配置P1个用于承载第一部分内容的第一资源，P2个用于承载第二部分内容的第二资源，其中P1≥1，1≤P2≤P1，且P1、P2为整数。终端设备可以根据资源之间或者资源与小区之间关联关系，隐式上报发生链路失败的小区标识和或该链路失败的小区是否识别出新链路的情况。如该P1第一资源可以与Q个第一小区相关联。进一步地，P1＝Q,P1个第一资源中的一个资源可以关联Q个第一小区中的一个第一小区。该P2个第二资源可以与Q个第一小区相关联。进一步地，P2＝Q,P2个第二资源中的一个资源可以关联一个Q个第一小区中的一个第一小区。该P2个第二资源还可以与P1个第一资源相关联。
应理解，终端设备在其中一个或多个第一资源上发送第一部分内容的指示信息用于指示该一个或多个第一资源对应的一个或多个小区发生链路失败，在终端设备判断该一个或多个小区是否识别出新的链路后，在该一个或多个小区对应的第二资源上发送是否识别出新的链路的第二部分内容的指示信息。
终端设备确定Q个第一小区中的L个第一小区发生链路失败，终端设备从P1个第一资源中选择至少一个资源用于发送第一部分内容，该第一部分内容指示该发生链路失败的L个第一小区的小区标识或小区组标识。例如,P1个第一资源与Q个第一小区有一一对应关系，那么终端设备选择P1个第一资源中与该发生链路失败的L个第一小区有对应关系或关联关系的L个第一资源发送第一部分内容(用于指示该P1个第一资源对应的L个第一小区发生链路失败)。终端设备可以从P2个第二资源中选择至少一个资源发送第二部分内容，该第二部分内容指示该发生链路失败的该L个第一小区的每个小区是否识别出新的链路的信息。例如,P2个第二资源与Q个第一小区有一一对应关系，那么终端设备选择P2个第二资源中与该发生链路失败的L个第一小区有对应关系或关联关系的L个第二资源发送第二部分内容。再例如，P2个第二资源与L个第一资源一一对应关系(该关联关系是动态的，因为L个第一资源是动态选择的，如协议规定P2个资源可以与终端设备上报第一部分内容中的L个第一资源顺序关联)，那么终端设备选择P2个第二资源中与该发生链路失败的L个第一小区有对应关系或关联关系的L个第二资源发送第二部分内容。举个例子来说，网络设备配置5个第一资源分别与小区#1,#2,#3,#4,#5对应，2个第二资源；终端确定小区#1和#5发生链路失败，在第一资源#1和第一资源#5上报第一部分内容，在第二资源#1上报小区#1的新链路识别情况，在第二资源#2上报小区#5的新链路识别情况。
示例二
网络设备配置一个第一资源用于承载第一部分内容，一个第二资源用于承载第二部分内容。终端设备可以通过显示方式上报发生链路失败的第一小区的标识和或该发生链路失败的小区的新链路识别情况。终端设备在该一个第一资源上发送第一部分内容，在该一个第二资源上发送第二部分内容。
示例三
网络设备配置一个第一资源用于承载第一部分内容，多个第二资源用于承载第二部分内容。终端设备可以通过显示方式上报发生链路失败的第一小区的标识和或通过隐式方式 上报该发生链路失败的小区的新链路识别情况。终端设备在该一个第一资源上发送第一部分内容，从该多个第二资源中选择至少一个资源发送第二部分内容。其中，如何通过隐式方式上报小区标识，其方法同示例一，此处不再赘述。
示例四
网络设备配置多个第一资源用于承载第一部分内容，一个第二资源用于承载第二部分内容。终端设备可以通过隐式方式上报发生链路失败的第一小区的标识和或通过显示方式上报该发生链路失败的小区的新链路识别情况。终端设备从该多个第一资源中选择至少一个资源发送第一部分内容，在该一个第二资源上发送第二部分内容。其中，如何通过隐式方式上报第二部分内容，其方法同示例一，此处不再赘述。
通过将第一部分内容与第二部分内容承载在不同资源上，网络设备可以独立解码两部分内容，其资源配置或者编码更加灵活，可以获得更好的解码成功率。此外，若第一部分内容指示的链路失败的小区个数是变化的，那么需要上报的发生链路失败的每个小区是否识别出新的链路的总的比特数也是随之变化的，也即第二部分内容的比特数也是变化的。因此若第一部分内容与第二部分内容承载在不同资源上或者独立编码，网络设备可以不用按照最大比特数分配固定大小资源，可以降低资源开销。
应理解，情况2中，第一资源和第二资源可以是相同的资源，此时第一部分内容与第二部分内容独立编码。第一资源和第二资源还可以是不同的资源。
通过上述实现方式，网络设备可以为终端设备配置一个或多个资源，该资源用于承载第一指示信息，该第一指示信息可以指示一个或多个小区是否发生链路失败，或者指示链路失败的一个或多个小区的小区标识，并且指示该一个或多个小区的每个小区的新链路识别情况(是否识别出新的链路)，终端设备上报第一指示信息给网络设备。网络设备可以获知发生链路失败的小区和该小区的新链路识别情况，使得网络设备可以及时根据每个发生链路失败的小区的新链路识别情况，较早触发新的参考信号的资源集合，从而降低链路失败恢复时延。此外，当多个小区发生链路失败时，该方法可以同时进行链路恢复，降低链路失败恢复时延。
在一种可能的实现方式中，该第一指示信息包括第一部分内容和第二部分内容，其中，第一部分内容用于指示一个发生链路失败的小区标识，第二部分内容用于指示该小区是否识别出新的链路。
应理解，在该种实现方式中，步骤302是可选地步骤。
相应地，网络设备可以根据该方法解码或解析第一部分内容和第二部分内容。即根据第一部分内容解码或解析第二部分内容。
可选地，第二部分内容指示第一部分内容指示的一个链路失败的小区对应的新链路的识别情况(是否识别出新链路)。具体地，假设网络设备配置了Q个SCell(可选地，该Q个SCell是需要链路失败检测的SCell，也就是说网络设备配置了需要链路失败检测的Q个SCell)，终端设备确定一个或个SCell的链路失败，终端设备将3个链路失败的SCell中的一个SCell的标识上报给网络设备，并将该SCell的新链路识别情况(是否识别出新的链路的信息)上报给网络设备。
应理解，上述实现方式中，第一指示信息可以具有多种形式，下面将详细描述在某些可能的情况下的第一指示信息，并描述本实现方式中第一部分内容与第二部分内容的可能 的资源配置方式。可选地，第一部分内容与第二部分内容承载在不同资源上，和或，第一部分内容与第二部分内容独立编码。其中，该资源可以是PRACH资源(竞争的或非竞争的)，还可以是PUCCH资源，还可以是半静态的PUSCH资源等。
示例五
网络设备配置多个第一资源用于承载第一部分内容，一个第二资源用于承载第二部分内容。终端设备可以通过隐式方式上报发生链路失败的一个第一小区的标识，和或上报该发生链路失败的一个第一小区的新链路识别情况。终端设备从该多个第一资源中选择一个资源发送第一部分内容(即发生链路失败的一个第一小区的标识)，在该一个第二资源上发送第一部分内容指示的第一小区的新链路识别情况(即第二部分内容)。更具体地，网络设备可以配置P1个用于承载第一部分内容的第一资源，一个用于承载第二部分内容的第二资源，其中P1≥1，且P1为整数。终端设备可以根据资源之间或者资源与小区之间关联关系，隐式上报一个链路失败的小区标识，并根据该第一部分内容指示的一个链路失败的小区标识上报该一个链路失败的小区是否识别出新链路的情况。如该P1第一资源可以与Q个第一小区相关联。进一步地，P1＝Q,P1个第一资源中的一个资源可以关联Q个第一小区中的一个第一小区(也可以理解为Q个第一小区中的每个小区关联一个第一资源)。举个例子来说，网络设备配置5个第一资源分别与小区#1,#2,#3,#4,#5对应，1个第二资源；终端确定小区#2发生链路失败，在第一资源#2上报第一部分内容，在第二资源上报小区#2的新链路识别情况。
例如，对发生链路失败的C1小区，第一资源承载的第一部分内容用于指示该小区的标识C1，第二资源承载的第二部分内容用于指示该C1没有识别出新的链路。同理，对于发生链路失败的C2小区，网络设备也为C2配置了一个第一资源，第一资源承载的第一部分内容用于指示该小区的标识C2，第二资源承载的第二部分内容用于指示该C2识别出了新的链路。
示例六
网络设备配置一个第一资源用于承载第一部分内容，一个第二资源用于承载第二部分内容。终端设备可以通过显示方式上报链路失败的一个第一小区的标识(即第一部分内容)，并上报该链路失败的一个第一小区的新链路识别情况(即第二部分内容)。终端设备在该一个第一资源上发送第一部分内容，在该一个第二资源上发送第二部分内容。
应理解，上述实现方式中，第一资源和第二资源可以是相同的资源，此时第一部分内容与第二部分内容独立编码，分别占用不同的比特位。第一资源和第二资源还可以是不同的资源。
通过上述实现方式，网络设备可以为终端设备的配置一个或多个资源，该资源用于承载第一指示信息。第一指示信息指示指示发生链路失败的一个小区标识，以及指示该发生链路失败的一个小区是否识别出新的链路的信息，终端设备在对应的资源上上报第一指示信息给网络设备。网络设备可以获知发生链路失败的小区和该小区的新链路识别情况，使得网络设备可以及时根据该发生链路失败的小区的新链路识别情况，较早触发新的资源集合，从而降低链路失败恢复时延。此外，网络设备可以配置一个或多个资源用于指示链路失败的小区标识，再配置一个资源用于指示链路失败的小区的新链路识别情况；或者终端设备可以通过某些比特位上报一个链路失败小区的标识，再通过另一个比特位上报该一个 链路失败小区的新链路的识别情况；也可以理解为终端设备根据第一部分的上报内容确定第二部分内容。该方法可以有效节省资源开销。
此外，当一个小区发生链路失败时，该方法可以针对一个小区单独做链路恢复。
在一种可能的实现方式中，该第一指示信息包括第一部分内容和第二部分内容，其中，第一部分内容用于指示多个发生链路失败的小区标识，第二部分内容用于指示该多个发生链路失败的小区是否全都没有识别出新的链路。
应理解，在该种实现方式中，步骤302是可选地步骤。
其中，第二部分内容用于指示该多个发生链路失败的小区是否全都没有识别出新的链路可以理解为，当第一部分内容指示的多个链路失败的小区的新链路都没有被识别出时，上报第一状态；当第一部分内容指示的多个链路失败的小区的新链路至少有一个被识别出时，上报第二状态。
应理解，这里的第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，第二状态为所述M个第一小区中的第j个第一小区有满足所述第一预设条件的第一参考信号的状态，或者第二状态为所述M个第一小区中的至少一个第一小区有满足所述第一预设条件的第一参考信号的状态。
还应理解，在本申请实施例中，第二部分内容的第一状态和第二状态可以通过以下3种方式进行指示。
方式1：通过两个状态值，如状态值0表示第一状态，状态值1表示第二状态。
方式2：通过两个资源，如在一个第二资源上发送信号表示第一状态，在另一个第二资源上发送信号表示第二状态。
方式3：通过一个第二资源上发送或不发送信号表示两个状态，如在该第二资源上不发送信号表示第一状态，在该第二资源上发送信号表示第二状态。
应理解，在本申请实施例中，有发送第二部分内容的场景，和不发送第二部分内容的场景，以上的三种方式都是可能的实现方式，不应对本申请的方案造成影响。
此外，第一指示信息/第一请求消息中的第一状态，或者第二指示信息/第二请求消息中的第一状态还可以通过方法4指示。
方法4：通过某个特殊状态位指示第一状态。如下表3所示，该指示信息包括2比特用于指示参考信号的信息，其中该2比特的最低状态位(可以是00状态)指示第一状态。
表3
取值(参考信号的信息) 指示的参考信号
00 no beam(没有新链路)
01 参考信号#1
10 参考信号#2
11 参考信号#3
具体地，假设网络设备为终端设备提供了Q个Scell，终端设备确定3个Scell的链路失败，终端设备将该3个链路失败的Scell的标识(identification，ID)上报给网络设备。如下表4所示，3个链路失败的Scell的标识分别为C1、C2和C3，第一部分内容可以包括该链路失败的3个小区的标识，第二部分内容可以包括该3个小区是否全都没有识别出 新的链路，例如对于C1、C2和C3，全都没有识别到新的链路，因此，第二部分内容为yes，用于告诉网络设备3个链路失败的Scell都没有识别出新的链路。
表4
Figure PCTCN2020083104-appb-000001
应理解，上述实现方式中，第一指示信息可以具有多种形式，下面将详细描述在某些可能的情况下的第一指示信息，并分情况描述本实现方式中第一部分内容与第二部分内容的可能的资源配置方式。
示例七
网络设备配置多个第一资源用于承载第一部分内容，一个第二资源用于承载第二部分内容。终端设备可以通过隐式方式上报发生链路失败的多个第一小区的标识，和或，上报该发生链路失败的多个第一小区的对应的新链路是否均没有被识别出的情况。终端设备从该多个第一资源中选择至少两个资源发送第一部分内容(即发生链路失败的多个第一小区的标识)，在该一个第二资源上发送第一部分内容指示的多个第一小区的新链路是否均没有被识别出的情况(即第二部分内容)。
更具体地，网络设备可以配置P1个用于承载第一部分内容的第一资源，一个用于承载第二部分内容的第二资源，其中P1≥1，且P1为整数。终端设备可以根据资源之间或者资源与小区之间关联关系，隐式上报多个链路失败的小区标识，并根据该第一部分内容指示的该多个链路失败的小区标识上报该多个链路失败的小区是否均没有识别出新链路的情况。如该P1第一资源可以与Q个第一小区相关联。进一步地，P1＝Q,P1个第一资源中的一个资源可以关联Q个第一小区中的一个第一小区(也可以理解为Q个第一小区中的每个小区关联一个第一资源)。举个例子来说，网络设备配置5个第一资源分别与小区#1,#2,#3,#4,#5对应，1个第二资源；终端确定小区#2和小区#5发生链路失败，在第一资源#2和第一资源#5上报第一部分内容，在第二资源上报小区#2和小区#5的新链路识别情况(例如，若没有识别出小区#2的新链路和小区#5的新链路，则在第二资源上上报状态值0；若小区#2的新链路和小区#5的新链路至少识别出一个，则在第二资源上上报状态值1)。
示例八
网络设备配置一个第一资源用于承载第一部分内容，一个第二资源用于承载第二部分内容。终端设备可以通过显示方式上报链路失败的多个第一小区的标识(即第一部分内容)，并上报该链路失败的多个第一小区的是否均没有识别出新链路的情况(即第二部分内容)。终端设备在该一个第一资源上发送第一部分内容，在该一个第二资源上发送第二部分内容。举个例子来说，网络设备配置1个第一资源(该资源可以承载多个比特信息)，1个第二资源；终端确定小区#2和小区#5发生链路失败，在第一资源上报小区#2的标识和小区#5的标识(即第一部分内容)，在第二资源上报小区#2和小区#5的新链路识别情 况。例如：共有16个小区(小区#1至16)需要链路失败检测，则第一资源上报0001和0100，其中0001指示小区#2，0100指示小区#5；若没有识别出小区#2的新链路和小区#5的新链路，则在第二资源上上报状态值0；若小区#2的新链路和小区#5的新链路至少识别出一个，则在第二资源上上报状态值1。
应理解，上述实现方式中，第一资源和第二资源可以是相同的资源，此时第一部分内容与第二部分内容独立编码，分别占用不同的比特位。第一资源和第二资源还可以是不同的资源。
应理解在示例五和示例七中，网络设备为每个Scell配置对应的第一资源，第一资源用于承载第一部分内容(即指示一个或者多个链路失败的小区标识)；并配置一个第二资源用于指示一个或者多个链路失败的小区是否全部都没有识别出新的链路。终端设备可以在其中一个或多个第一资源上发送第一部分内容，用于指示该资源对应的一个或多个小区发生链路失败；终端设备在判断该一个或多个小区是否均全都没有识别出新的链路后，终端设备在第二资源发送第二部分内容或者确定在网络设备配置的第二资源是否发送信号。
应理解在示例六和示例八中，网络设备为配置一个第一资源，该第一资源用于承载第一部分内容(即指示一个或者多个链路失败的小区标识)；并配置一个第二资源用于指示一个或者多个链路失败的小区是否全部都没有识别出新的链路。终端设备可以在其中一个或多个第一资源上发送第一部分内容，用于指示该资源对应的一个或多个小区发生链路失败；终端设备在判断该一个或多个小区是否均全都没有识别出新的链路后，终端设备在第二资源发送第二部分内容或者确定在网络设备配置的第二资源是否发送信号。
通过上述实现方式，网络设备可以为终端设备配置一个资源或多个资源，该资源用于承载第一部分内容，该第一部分内容可以指示发生链路失败的一个小区标识，并且为发生链路失败小区配置一个第二资源，该第二资源用于承载第二部分内容，该第二部分内容可以指示发生链路失败的小区是否全都没有识别出新的链路，并将包括该第一部分内容和第二部分内容的第一指示信息上报给网络设备。网络设备可以获知发生链路失败的多个小区和该多个小区的新的链路识别的总体情况，使得网络设备可以及时根据该发生链路失败的多个小区的新的链路的总体识别情况，较早触发新的资源集合，从而降低链路失败恢复时延。
此外，相比于前述为每个Scell配置一个第二资源的技术方案，该实现方式通过为多个发生链路失败的Scell配置一个第二资源，上报发生链路失败的Scell是否全都没有识别出新的链路的指示信息，可以节省资源开销。或者说由于链路失败的多个小区共享一个第二资源指示第二部分内容，或者说由于链路失败的多个小区共享一个比特位指示第二部分内容，可以有效节省资源开销。
可选地，第一资源和第二资源可以是物理上行控制信道(physical uplink control channel，PUCCH)。换言之，第一请求消息可以通过PUCCH发送给网络设备，本申请对此不做限定。
可选地，应理解示例一至示例八中通过显示方法上报的信息一般通过可以承载多个比特信息的PUCCH信道或PUSCH信道发送；可选地，应理解示例一至示例八中通过隐示方法上报的信息一般通过可以承载一个比特信息的PRACH信道或PUCCH信道或某些序 列承载(可以获得更好的可靠性，提高传输正确率)发送，还可以通过PRACH/PUCCH/PUSCH的不同时域/频域/码域资源发送。
304，网络设备根据第一请求信息或第一指示信息，确定发生链路失败的小区和或链路失败的小区的新的链路识别情况，生成下行控制信息(downlink control information，DCI)。
或者说，网络设备根据第一请求信息，确定发生链路失败的小区和或链路失败的小区的新的链路识别情况，生成第一请求消息的响应消息。
或者说，网络设备根据第一请求信息，生成第一请求消息的响应消息。
应理解，该第一请求消息的响应消息可以为下行控制信息。
可选地，该第一请求消息的响应消息可以用于指示PUSCH资源。
在一种可能的实施方式中，第一请求消息指示第一状态，该DCI用于指示第二参考信号的资源集合。
具体地，终端设备确定没有新的链路，并将发生链路失败的第一小区的标识上报给网络设备，网络设备可以重新为终端设备配置其他参考信号资源集合，即通过DCI为终端设备重新配置第二参考信号的资源集合。
可选地，该第二参考信号的资源集合可以包括周期的、非周期的或者半周期的参考信号，本申请对此不做限定。
应理解，本申请中的“第二参考信号的资源集合”可以包括第一小区上的参考信号资源，或者可以仅包括其他小区上的参考信号资源，或者可以包括第一小区的参考信号和其他小区的参考信号资源(也即该第二参考信号的资源集合可以包括多个小区的参考信号资源)。本申请实施例对此并不作限定。
应理解，本申请中，第二参考信号的资源集合可以是一个资源集合，还可以是多个参考信号资源集合。
在一种可能的实施方式中，若第一指示信息指示第一状态，则该DCI指示的是第二参考信号资源集合，或者该DCI默认关联第二参考信号资源集合；若第一指示信息指示第二状态，则该DCI默认关联第一参考信号资源集合。可选地终端设备在该DCI指示的资源上发送第二请求消息。
在一种可能的实现方式中，该第二参考信号的资源集合可以不包括候选波束列表(candidate beam list)。在步骤302中，当配置有candidate beam list时，终端设备已经对该候选波束列表中的参考信号进行检测，确认没有识别出新的链路。因此，该第二参考信号的资源集合不包括该候选波束列表中的资源，可以避免终端设备再次进行检测，从而降低链路恢复的时延。
在一种可能的实现方式中，该DCI是在用于发送通信失败恢复响应的搜索空间集合(beam failure recovery search space，BFR search space)内和/或控制资源集合(CORESET)内的资源发送的。
上述方案在发送DCI的过程中，在网络设备发送BFRR的搜索空间集合和/或控制资源集合发送DCI，可以通过重传步骤继续链路恢复过程，提高链路恢复的可靠性。
在一种可能的实现方式中，该DCI是由链路失败恢复请求的无线网络临时标识(beam failure recovery-radio network temporary identifier，BFR-RNTI)加扰的。
上述方案网络设备向终端设备发送的DCI是经过BFR-RNTI加扰的，当终端设备接收到经过加扰的DCI之后，可以根据该加扰信息判断该DCI是用于链路恢复过程，可以减少终端设备的检测过程，从而降低链路恢复的时延，提高链路恢复可靠性。
可选地，该DCI还可以是经过小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)加扰的，或者经过其他专用无线网络临时标识RNTI加扰的，本申请实施例对此并不作限定。
应理解，本步骤中，承载所述第一请求消息的响应消息的“第二资源”不同于步骤303中的“第二资源”。
305，网络设备向终端设备发送DCI，相应地，终端设备接收网络设备发送的DCI。应理解步骤304和步骤305可以是同一个步骤。
306，终端设备根据网络设备发送的DCI，确定第二参考信号的资源集合，并在第二参考信号的资源集合中识别新的链路信息。
具体地，终端设备接收网络设备发送的DCI，终端设备在该DCI指示的第二参考信号的资源集合中识别新的链路。
示例性的，在终端设备识别新的链路的过程中，当终端设备判断该第二参考信号的资源集合中有参考信号的信道质量信息大于或等于第二预设门限时，该终端设备可以将信道质量信息大于或等于第二预设门限的参考信号确定为新的链路。
可选地，这里的第二预设门限可以为链路恢复门限，也可以为重新配置的门限，本申请对此不做限定。
应理解，该第二预设门限可以为第一预设门限。
307，终端设备向网络设备发送第二请求消息，相应地，网络设备接收终端设备发送的第二请求消息，该第二请求消息包括第二指示信息，该第二指示信息用于指示终端设备识别出的新的链路的状态。
可选地，该第二请求消息可以是第二链路失败请求消息(BFRQ 2)。
在一种可能的实现方式中，在步骤306中，终端设备从第二参考信号的资源集合中确定出新的链路，该新的链路的信道质量信息大于或等于第二预设门限时，该第二指示信息可以包括终端设备识别出的新的链路的信息，并通过第二链路失败请求消息(BFRQ 2)上报给网络设备。
示例性的，第二指示信息的内容可以如下表5所示，其中，2bit的取值(value)用于指示发生链路失败的Scell的标识，每一个发生链路失败的Scell对应一个识别出的新的链路的信息，如beam 0、beam1等。
表5
取值(Scell的标识) 识别出新的链路信息
00 beam 0
10 beam 2
可选的，第二指示信息上报的新的链路的信息按照第一指示信息中指示的Scell的ID从小到大依次排列。
例如，如下表6所示，按照第一指示信息中上报的Scell的ID排列，一次为C1、C2 和C3，将识别出的波束也对应的按照Scell的ID顺序进行排列，即不需要再上报Scell的标识或者取值信息，只需要上报beam0、beam 1、beam2的信息即可，网络设备也可以准确的知道某个链路失败的Scell对应的新的链路，该方法可以节省资源开销。
表6
取值(Scell的标识) 识别出新的链路信息
C1 beam 0
C2 beam 1
C3 beam 2
在另一种可能的实现方式中，在步骤306中，终端设备从第二参考信号的资源集合中，确定没有新的链路满足条件，即第二参考信号的资源集合中的所有链路的信道质量信息小于第二预设门限时，该第二指示信息用于指示没有新的链路(no new beam state)，并通过第二链路失败请求消息(BFRQ 2)上报给网络设备。再返回并循环执行步骤304、305、306，直到终端设备识别出新的链路。
示例性的，此时第二指示信息的内容可以如下表7所示，其中，2bit的取值(value)用于指示发生链路失败的Scell的标识，当一个发生链路失败的Scell没有识别出的新的链路时，上报no beam的指示信息，用于指示没有新的链路。
表7
取值(Scell的标识) 识别出新的链路信息
00 no beam
应理解，在终端设备循环执行步骤304、305、306识别新的链路的过程中，可以通过链路失败恢复计时器(beam failure recovery timer)和链路失败恢复计数器(beam failure recovery counter)进行监控。具体地，当终端设备确定no new beam state的次数大于或等于链路失败恢复计数器的最大值，仍然收不到BFRR，即可认为链路恢复失败；或者终端设备开始启动链路恢复的时长大于或等于所述恢复计时器的恢复时间，即可认为链路恢复失败，停止发送链路失败恢复请求消息(BFRQ)和/或恢复链路失败恢复计时器的计时、以及链路失败恢复计数器的计数。
或者，在步骤306中，终端设备从第二参考信号的资源集合中，确定没有新的链路满足条件，即第二参考信号的资源集合中的所有链路的信道质量信息小于第二预设门限时，该第二指示信息用于指示至少一个第一参考信号，并通过第二链路失败请求消息(BFRQ 2)上报给网络设备。
或者，在步骤306中，终端设备从第二参考信号的资源集合中，确定没有新的链路满足条件，即第二参考信号的资源集合中的所有链路的信道质量信息小于第二预设门限时，该第二指示信息用于指示至少一个第二参考信号，并通过第二链路失败请求消息(BFRQ 2)上报给网络设备。
或者，在步骤306中，终端设备从第一参考信号的资源集合中，确定没有新的链路满足条件，即第一参考信号的资源集合中的所有链路的信道质量信息小于第一预设门限时，该第二指示信息用于指示至少一个第二参考信号，并通过第二链路失败请求消息(BFRQ  2)上报给网络设备。
应理解，这里当网络设备没有为Scell配置链路恢复门限时，且终端设备在第二参考信号的资源集合中没有检测到新的链路，终端设备可以通过第二指示信息上报至少一个第一参考信号，该上报的至少一个第一参考信号是原集合内信道质量较好的参考信号，此时上报的至少一个第一参考信号的信道质量可以大于、等于或者小于第二预设门限，本申请对此不做限定。
在一种可能的实现方式中，步骤303中的第一请求消息和步骤307第二请求消息包括的内容为独立编码。
在另一种可能的实现方式中，步骤303中的第一请求消息和步骤307第二请求消息可以为同一个请求消息或不同的请求消息。换言之，该第一指示信息和第二指示信息可以通过同一个请求消息发送到网络设备，或者通过不同的请求消息发送到网络设备。
在另一种可能的实现方式中，步骤303中的第一请求消息和步骤307第二请求消息可以通过相同的信道发送，或者通过不同的信道发送，本申请对此不做限定。
示例性的，终端设备可以通过第一资源向网络设备发送第一请求消息，通过第二资源接收网络设备发送的DCI，在第三资源上接收所述第二请求消息的响应消息。可选地，第一资源可以是物理上行共享信道(physical uplink shared channel，PUSCH)，本申请对此不做限定。
应理解，本步骤中，该“第二资源”可以不同于步骤303中的“第二资源”。
在另一种实施方式中，若第一指示信息指示第一状态，则终端设备在预设的第四资源上上报第二参考信号资源集合中的K个第二参考信号的信息，该第二参考信号资源集合是默认的资源集合或者是预设的资源集合；若第一指示信息指示第二状态，则终端设备在预设的第四资源上上报第一参考信号资源集合中的K个第一参考信号的信息。应理解，该预设的第四资源可以是与第一资源和或第二资源关联的资源。该第四资源的配置信息通过广播信道、系统消息、更新的系统消息，层一信令(DCI)、高层信令(例如RRC或MAC-CE)中的一种信令或者多种信令构成的组合信令配置。或该第四资源与第一资源/第二资源的关联关系可以是通过广播信道、系统消息、更新的系统消息，层一信令(DCI)、高层信令(无线资源控制(radio resource control，RRC)信令或媒体接入控制单元(medium access control-control element，MAC-CE)信令)中的一种信令或者多种信令构成的组合信令配置。可选地，在该种实施方式中，可以不执行步骤304/305/306。
在一种可能的实现方式中，当第一指示信息用于指示终端设备没有识别出新的链路时，终端设备不生成第二指示信息且不发送第二指示信息，而是等待网络设备发送的用于重新配置资源集合的QCL，进行链路恢复，可以提高链路失败后恢复的概率。否则，当第一指示信息指示终端设备识别出新的链路时，终端设备生成第二指示信息并发送该第二指示信息，向网络设备上报识别出的新的链路。
在另一种可能的实现方式中，当第一指示信息指示终端设备没有识别出新的链路时，第二指示信息指示的参考信号可以是非周期的/周期的/半周期的参考信号资源集合(第二参考信号资源集合)等，或者某个默认的参考信号资源集合(例如用于波束管理BM的参考信号资源集合，或者是用于RRM测量的参考信号资源集合，或者是复用其他功能的某个参考信号资源集合)；否则，当第一指示信息指示终端设备识别出新的链路时，第二指 示信息对应的参考信号是候选波束列表中对应的参考信号。
308，网络设备根据第二指示信息或第二请求消息，确定新的链路信息。
309，网络设备向终端设备发送链路失败恢复响应消息(BFRR)，相应地，终端设备接收该链路失败恢复响应消息(BFRR)。
310，终端设备检测到链路失败恢复响应消息(BFRR)，确认链路恢复成功。
具体地，终端设备根据步骤307中反馈第二指示信息中包括的新的链路的信息，检测BFRR。若终端设备检测到BFRR，则认为链路失败恢复成功；若终端设备检测不到BFRR，终端设备可以重新执行步骤303-307的过程，直到链路失败恢复成功。
应理解，在终端设备可以重新执行步骤303-307的过程中，可以通过链路失败恢复计时器(beam failure recovery timer)和链路失败恢复计数器(beam failure recovery counter)进行监控。具体地，当终端设备发送链路失败恢复请求的次数大于或等于链路失败恢复计数器的最大值，或者链路失败恢复时间超过预设时长，则认为链路失败恢复失败。
需要说明的是，本申请各实施例中，“小区标识”还可以替换为“小区索引”。参考信号信息可以包括参考信号索引/SSB的索引和或参考信号的质量/SSB的质量。
通过上述方案，当发生链路失败进行链路恢复时，如果终端设备确定没有识别出新的链路，终端设备可以将发生链路失败的小区标识和或每个小区是否识别到新的链路的信息上报给网络设备，网络设备可以根据该信息重新配置新的资源集合，并将该新的资源集合通过下行控制信息通知给终端设备，换言之，如通过DCI触发其他资源集合中的参考信号，并上报该资源集合中的参考信号，用于链路恢复，从而可以提高链路失败恢复概率，减小链路失败恢复时延，提高链路失败恢复可靠性。
应理解，在链路失败恢复过程中，可以包括以上介绍的全部步骤或者部分步骤，本申请对此不做限定。示例性的，通信系统可以执行步骤301，303，304，305，306，307，不执行302；或者，还可以执行步骤301，303，不执行中间的步骤，还可以不执行后面的步骤；又或者，还可以执行步骤301,303，307，不执行中间的步骤；又或者，还可以执行上述步骤中的一个或多个步骤，或者执行所有步骤。
需要说明的是，终端设备在步骤302确认没有新链路后可以在第二小区上检测DCI信息，确定新的参考信号资源集合，若终端设备确认有新链路后可以根据新链路在第一小区上检测响应信息。
图4是本申请实施例提供的又一例链路失败恢复的方法的示意性流程图。以Scell和终端设备之间链路失败为例，以终端设备和网络设备作为执行主体，对方法400的每个步骤进行详细说明。
作为示例而非限定，方法400的执行主体也可以是应用于终端设备的芯片和应用于网络设备的芯片，本申请对此不做限定。
401，终端设备检测当前链路的工作状态。例如，终端设备可以检测得到当前链路，确定当前链路失败。
402，终端设备确认没有新的链路。
403，终端设备向网络设备发送第一请求消息，相应地，网络设备接收终端设备发送的第一请求消息，该第一请求消息包括第一指示信息，该第一指示信息用于指示终端设备没有新的链路。
404，网络设备根据第一指示信息，确定发生链路失败的小区和该小区的新的链路识别情况。
应理解，以上步骤401至404可参照方法300中的步骤301至304，为了简便，此处不再赘述。
405，网络设备向终端设备发送传输配置指示(transmission configuration indicator，TCI)，相应地，终端设备接收网络设备发送的TCI。
具体地，当网络设备确定M个Scell为没有识别到新的链路的状态时，终端设备不检测链路失败恢复响应信息(BFRR)，而是等待TCI重配信令，若收到该TCI重配信令则可以认为链路失败恢复成功，停止链路失败恢复时钟计时。
或者，若终端设备在链路失败恢复时钟超时之前，接收TCI重配信令，若接收到该信息则停止链路失败恢复时钟计时，否则若链路失败恢复时间超过预设时长，则认为链路失败恢复失败。
通过上述技术方案，在确认链路失败的小区识别不出新的链路后，终端设备不需要检测链路失败恢复响应信息，而是低功耗等待TCI重配信令，可以达到省电的效果。
需要说明的是，本申请各实施例中，第一小区可以是Scell，第二小区可以是Pcell或者是有上行资源的Scell。
以上结合图3和图4对本申请实施例的链路失败恢复的方法做了详细说明。以下，结合图5至图8对本申请实施例的链路失败恢复的装置进行详细说明。
图5示出了本申请实施例的链路失败恢复的装置500的示意性框图，该装置500可以对应上述方法300和400中描述的终端设备，也可以是应用于终端设备的芯片或组件，并且，该装置500中各模块或单元分别用于执行上述方法300和400中终端设备所执行的各动作或处理过程，如图5所示，该通信装置500可以包括：处理单元510和通信单元520。
处理单元510，用于确定发生链路失败的M个第一小区为第一状态，其中，所述第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数。
通信单元520，用于在第一资源上发送第一请求消息，所述第一请求消息用于指示所述M个第一小区的小区信息。
该通信单元520，还用于在第二资源上接收所述第一请求消息的响应消息，所述第一请求消息的响应消息用于指示第二参考信号的资源集合，所述第二参考信号的资源集合包括N个用于恢复所述M个第一小区的第二参考信号的资源，N≥1，且N为整数。
该处理单元510，还用于根据所述第一请求消息的响应消息，确定所述第二参考信号的资源集合。
具体地，该处理单元510用于执行方法300中的301、302、306以及方法400中的401、402和406，该通信单元520用于执行方法300中的303、305、307和309以及方法400中的403和405，各单元执行上述相应步骤的具体过程在方法400中已经详细说明，为了简洁，此处不加赘述。
图6示出了本申请实施例的链路失败恢复的装置600的示意性框图，该装置600可以对应(例如，可以应用于或本身即为)上述方法300和方法400中描述的基站，并且，该装置600中各模块或单元分别用于执行上述方法300和方法400中基站所执行的各动作或 处理过程，如图6所示，该通信装置600可以包括：处理单元610和通信单元620。
通信单元620，用于在第一资源上接收第一请求消息，所述第一请求消息用于指示发生链路失败的M个第一小区的小区信息，所述M个第一小区为第一状态，其中，所述第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数。
处理单元610，用于根据所述第一请求消息，确定所述M个第一小区的小区信息。
该通信单元620，还用于在第二资源上发送所述第一请求消息的响应消息，所述第一请求消息的响应消息用于指示第二参考信号的资源集合，所述第二参考信号的资源集合包括N个用于恢复所述M个第一小区的第二参考信号的资源，N≥1，且N为整数。
具体地，该处理单元610用于执行方法300中的304和308，以及方法400中的404，该通信单元620用于执行方法300中的303、305、307和309，以及方法400中的403和405，各单元执行上述相应步骤的具体过程在方法300和方法400中已经详细说明，为了简洁，在此不加赘述。
图7是本申请实施例提供的终端设备700的结构示意图。如图7所示，该终端设备700包括处理器710和收发器720。可选地，该终端设备700还包括存储器730。其中，处理器710、收发器720和存储器730之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器730用于存储计算机程序，该处理器710用于从该存储器730中调用并运行该计算机程序，以控制该收发器720收发信号。
上述处理器710和存储器730可以合成一个处理装置，处理器710用于执行存储器730中存储的程序代码来实现上述方法实施例中终端设备的功能。具体实现时，该存储器730也可以集成在处理器710中，或者独立于处理器710。收发器720可以通过收发电路的方式来实现。
上述终端设备还可以包括天线740，用于将收发器720输出的上行数据或上行控制信令通过无线信号发送出去，或者将下行数据或下行控制信令接收后发送给收发器720进一步处理。
应理解，该装置700可对应于根据本申请实施例的方法300和方法400中的终端设备，该装置700也可以是应用于终端设备的芯片或组件。并且，该装置700中的各模块实现图3中的方法300、图4中方法400中的相应流程，具体地，该存储器730用于存储程序代码，使得处理器710在执行该程序代码时，控制该处理器710用于执行方法300中的301、302、306以及方法400中的401、402和406，该收发器720用于执行方法300中的303、305、307和309以及方法400中的403和405，各单元执行上述相应步骤的具体过程在方法400中已经详细说明，为了简洁，在此不加赘述。
图8是本申请实施例提供的网络设备800的结构示意图。如图8所示，该网络设备800(例如基站)包括处理器810和收发器820。可选地，该网络设备800还包括存储器830。其中，处理器810、收发器820和存储器830之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器830用于存储计算机程序，该处理器810用于从该存储器830中调用并运行该计算机程序，以控制该收发器820收发信号。
上述处理器810和存储器830可以合成一个处理装置，处理器810用于执行存储器830中存储的程序代码来实现上述方法实施例中基站的功能。具体实现时，该存储器830 也可以集成在处理器810中，或者独立于处理器810。收发器820可以通过收发电路的方式来实现。
上述网络设备还可以包括天线840，用于将收发器820输出的下行数据或下行控制信令通过无线信号发送出去，或者将上行数据或上行控制信令接收后发送给收发器820进一步处理。
应理解，该装置800可对应于根据本申请实施例的方法300和方法400中的基站，该装置800也可以是应用于基站的芯片或组件。并且，该装置800中的各模块实现图3中的方法300、图4中方法400中的相应流程，具体地，该存储器830用于存储程序代码，使得处理器810在执行该程序代码时，控制该处理器810用于执行方法300中的304和308，以及方法400中的404，该收发器820用于执行方法300中的303、305、307和309，以及方法400中的403和405，各单元执行上述相应步骤的具体过程在方法400中已经详细说明，为了简洁，在此不再赘述。
应理解，在本申请实施例中，第一请求消息和第二请求消息可以是相同的请求信息，例如统一称为第一请求消息。那么“不发送第二请求消息”，可以理解为，“不发送第二指示信息”；或者，可以理解为，第一请求消息中不包括第二指示信息；又或者，可以理解为，第一请求消息中仅包括第一指示信息。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合的方式来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不加赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合。另一点，所显示或讨论的相互之间的耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接。
另外，在本申请各个实施例中的各功能单元可以集成在一个物理实体中，也可以是各个单元单独对应一个物理实体，也可以两个或两个以上单元集成在一个物理实体中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (66)

  1. 一种链路失败恢复的方法，其特征在于，包括：
    确定发生链路失败的M个第一小区为第一状态，其中，所述第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；
    在第一资源上发送第一请求消息，所述第一请求消息用于指示所述M个第一小区的小区信息；
    在第二资源上接收所述第一请求消息的响应消息，所述第一请求消息的响应消息用于指示第二参考信号的资源集合，所述第二参考信号的资源集合包括N个用于恢复所述M个第一小区的第二参考信号的资源，N≥1，且N为整数；
    根据所述第一请求消息的响应消息，确定所述第二参考信号的资源集合。
  2. 根据权利要求1所述的方法，其特征在于，所述M个第一小区的小区信息包括所述M个第一小区的小区标识和/或所述M个第一小区的第一状态的信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述根据所述第一请求消息的响应消息，确定所述第二参考信号的资源集合之后，所述方法还包括：
    发送第二请求消息；其中，
    所述第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和/或
    所述第二请求消息用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有用于恢复所述第j个第一小区的满足第二预设门限的第二参考信号的状态，1≤j≤M，且j为整数。
  4. 根据权利要求3所述的方法，其特征在于，所述K个第二参考信号中每个第二参考信号的信道质量大于或等于第二预设门限。
  5. 根据权利要求3或4所述的方法，其特征在于，所述方法还包括：
    根据所述K个第二参考信号的信息，在第三资源上接收所述第二请求消息的响应消息。
  6. 根据权利要求3所述的方法，其特征在于，当所述第二请求消息中指示所述M个第一小区的第i个第一小区为所述第一状态的次数大于或等于预设次数时，确认所述第i个第一小区的链路恢复失败。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述第一请求消息的响应消息为以下的任意一种：
    专用搜索空间内的下行控制信息DCI；或
    专用控制资源集合的DCI；或
    专用无线网络临时标识RNTI加扰的DCI；或
    包含预设状态值的DCI。
  8. 一种链路失败恢复的方法，其特征在于，包括：
    在第一资源上接收第一请求消息，所述第一请求消息用于指示发生链路失败的M个 第一小区的小区信息，所述M个第一小区为第一状态，其中，所述第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；
    在第二资源上发送所述第一请求消息的响应消息，所述第一请求消息的响应消息用于指示第二参考信号的资源集合，所述第二参考信号的资源集合包括N个用于恢复所述M个第一小区的第二参考信号的资源，N≥1，且N为整数。
  9. 根据权利要求8所述的方法，其特征在于，所述M个第一小区的小区信息包括所述M个第一小区的小区标识和/或所述M个第一小区的第一状态的信息。
  10. 根据权利要求8或9所述的方法，其特征在于，所述在第二资源上发送所述第一请求消息的响应消息之后，所述方法还包括：
    接收第二请求消息，其中，
    所述第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和/或
    所述第二请求消息用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有用于恢复所述第j个第一小区的满足第二预设门限的第二参考信号的状态，1≤j≤M，且j为整数。
  11. 根据权利要求10所述的方法，其特征在于，所述K个第二参考信号中每个第二参考信号的信道质量大于或等于第二预设门限。
  12. 根据权利要求10或11所述的方法，其特征在于，所述方法还包括：
    根据所述K个第二参考信号的信息，在第三资源上发送所述第二请求消息的响应消息。
  13. 根据权利要求10所述的方法，其特征在于，当所述第二请求消息中指示所述M个第一小区的第i个第一小区为所述第一状态的次数大于或等于预设次数时，确认所述第i个第一小区的链路恢复失败。
  14. 根据权利要求8至13中任一项所述的方法，其特征在于，所述第一请求消息的响应消息为以下的任意一种：
    专用搜索空间内的下行控制信息DCI；或
    专用控制资源集合的DCI；或
    专用无线网络临时标识RNTI加扰的DCI；或
    包含预设状态值的DCI。
  15. 一种链路失败恢复的方法，其特征在于，包括：
    确定L个第一小区的链路失败；
    发送第一请求消息，所述第一请求消息包括第一指示信息，所述第一指示信息用于指示所述L个第一小区的小区信息，L≥1，且L为整数；
    其中，所述第一指示信息包括第一部分内容和/或第二部分内容，所述第一部分内容用于指示所述L个第一小区的小区标识，所述第二部分内容用于指示是否没有满足第一预设条件的第一参考信号。
  16. 根据权利要求15所述的方法，其特征在于，
    所述第二部分内容用于指示所述L个第一小区中的每个第一小区是否没有满足第一 预设条件的第一参考信号；或者
    所述第二部分内容用于指示所述L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
  17. 根据权利要求15或16所述的方法，其特征在于，所述方法还包括：
    发送第二请求消息，所述第二请求消息包括第二指示信息，所述第二指示信息用于指示恢复所述L个第一小区的参考信号的信息。
  18. 根据权利要求17所述的方法，其特征在于，所述第一指示信息和第二指示信息独立编码。
  19. 根据权利要求17或18所述的方法，其特征在于，所述第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
  20. 根据权利要求17或18所述的方法，其特征在于，当所述第二部分内容指示第一状态时，不发送所述第二请求消息，所述第一状态为所述L个第一小区中的每个小区都没有满足所述第一预设条件的第一参考信号的状态。
  21. 根据权利要求17至20中任一项所述的方法，其特征在于，当所述第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，所述第二指示信息指示恢复所述第i个第一小区的第二参考信号的信息，所述第一状态为所述L个第一小区中的第i个第一小区没有满足所述第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
  22. 根据权利要求17至20中任一项所述的方法，其特征在于，当所述第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，所述第二指示信息用于指示恢复所述第j个第一小区的第一参考信号的信息，其中，所述第二状态为所述L个第一小区中的第j个第一小区有满足所述第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数。
  23. 根据权利要求17至22中任一项所述的方法，其特征在于，所述第二指示信息指示的第w个参考信号对应于所述第一部分内容指示的所述L个第一小区的第w个小区，1≤w≤L，且i为整数。
  24. 一种链路失败恢复的方法，其特征在于，包括：
    接收第一请求消息，所述第一请求消息包括第一指示信息，所述第一指示信息用于指示L个第一小区的小区信息，所述L个小区为发生链路失败的小区，L≥1，且L为整数，其中，所述第一指示信息包括第一部分内容和/或第二部分内容，所述第一部分内容用于指示所述L个第一小区的小区标识，所述第二部分内容用于指示是否没有满足第一预设条件的第一参考信号；
    根据所述第一请求消息，确定所述L个第一小区的小区信息。
  25. 根据权利要求24所述的方法，其特征在于，
    所述第二部分内容用于指示所述L个第一小区中的每个第一小区是否没有满足第一预设条件的第一参考信号；或者
    第二部分内容用于指示所述L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
  26. 根据权利要求24或25所述的方法，其特征在于，所述方法还包括：
    接收第二请求消息，所述第二请求消息包括第二指示信息，所述第二指示信息用于指示恢复所述L个第一小区的参考信号的信息。
  27. 根据权利要求26所述的方法，其特征在于，所述第一指示信息和第二指示信息独立编码。
  28. 根据权利要求26或27所述的方法，其特征在于，所述第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
  29. 根据权利要求26或27所述的方法，其特征在于，当所述第二部分内容指示第一状态时，不接收所述第二请求消息，所述第一状态为所述L个第一小区中的每个小区都没有满足所述第一预设条件的第一参考信号的状态。
  30. 根据权利要求26或27所述的方法，其特征在于，当所述第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，所述第二指示信息指示恢复所述第i个第一小区的第二参考信号的信息，所述第一状态为所述L个第一小区中的第i个第一小区没有满足所述第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
  31. 根据权利要求26至30中任一项所述的方法，其特征在于，当所述第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，所述第二指示信息用于指示恢复所述第j个第一小区的第一参考信号的信息，其中，所述第二状态为所述L个第一小区中的第j个第一小区有满足所述第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数。
  32. 根据权利要求26至30中任一项所述的方法，其特征在于，所述第二指示信息指示的第w个参考信号对应于所述第一部分内容指示的所述L个第一小区的第w个小区，1≤w≤L，且w为整数。
  33. 一种链路失败恢复的装置，其特征在于，包括：
    处理单元，用于确定发生链路失败的M个第一小区为第一状态，其中，所述第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；
    通信单元，用于在第一资源上发送第一请求消息，所述第一请求消息用于指示所述M个第一小区的小区信息；
    所述通信单元，还用于在第二资源上接收所述第一请求消息的响应消息，所述第一请求消息的响应消息用于指示第二参考信号的资源集合，所述第二参考信号的资源集合包括N个用于恢复所述M个第一小区的第二参考信号的资源，N≥1，且N为整数；
    所述处理单元，还用于根据所述第一请求消息的响应消息，确定所述第二参考信号的资源集合。
  34. 根据权利要求33所述的装置，其特征在于，所述M个第一小区的小区信息包括所述M个第一小区的小区标识和/或所述M个第一小区的第一状态的信息。
  35. 根据权利要求33或34所述的装置，其特征在于，所述通信单元还用于：
    发送第二请求消息；其中，
    所述第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和/或
    所述第二请求消息用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有用于恢复所述第j个第一小区的满足第二预设门限的第二参考信号的状态，1≤j≤M，且i为整数。
  36. 根据权利要求34所述的装置，其特征在于，所述K个第二参考信号中每个第二 参考信号的信道质量大于或等于第二预设门限。
  37. 根据权利要求35或36所述的装置，所述通信单元还用于：
    根据所述K个第二参考信号的信息，在第三资源上接收所述第二请求消息的响应消息。
  38. 根据权利要求37所述的装置，其特征在于，当所述第二请求消息中指示所述M个第一小区的第i个第一小区为所述第一状态的次数大于或等于预设次数时，确认所述第i个第一小区的链路恢复失败。
  39. 根据权利要求33至38中任一项所述的装置，其特征在于，所述第一请求消息的响应消息为以下的任意一种：
    专用搜索空间内的下行控制信息DCI；或
    专用控制资源集合的DCI；或
    专用无线网络临时标识RNTI加扰的DCI；或
    包含预设状态值的DCI。
  40. 一种链路失败恢复的装置，其特征在于，包括：
    通信单元，用于在第一资源上接收第一请求消息，所述第一请求消息用于指示发生链路失败的M个第一小区的小区信息，所述M个第一小区为第一状态，其中，所述第一状态为所述M个第一小区中的每个小区都没有满足第一预设条件的第一参考信号的状态，M≥1，且M为整数；
    处理单元，用于根据所述第一请求消息，确定所述M个第一小区的小区信息；
    所述通信单元，还用于在第二资源上发送所述第一请求消息的响应消息，所述第一请求消息的响应消息用于指示第二参考信号的资源集合，所述第二参考信号的资源集合包括N个用于恢复所述M个第一小区的第二参考信号的资源，N≥1，且N为整数。
  41. 根据权利要求40所述的装置，其特征在于，所述M个第一小区的小区信息包括所述M个第一小区的小区标识和/或所述M个第一小区的第一状态的信息。
  42. 根据权利要求40或41所述的装置，其特征在于，所述通信单元还用于：
    接收第二请求消息，其中，
    所述第二请求消息用于指示恢复所述M个第一小区中的第i个第一小区的K个第二参考信号的信息，1≤i≤M，1≤K≤N,且i,K为整数，和/或
    所述第二请求消息用于指示所述M个第一小区中的第j个第一小区的第一状态的信息，所述第一状态为没有用于恢复所述第j个第一小区的满足第二预设门限的第二参考信号的状态，1≤j≤M，且i为整数。
  43. 根据权利要求42所述的装置，其特征在于，所述K个第二参考信号中每个第二参考信号的信道质量大于或等于第二预设门限。
  44. 根据权利要求42或43所述的装置，所述通信单元还用于：
    根据所述K个第二参考信号的信息，在第三资源上发送所述第二请求消息的响应消息。
  45. 根据权利要求44所述的装置，其特征在于，当所述第二请求消息中指示所述M个第一小区的第i个第一小区为所述第一状态的次数大于或等于预设次数时，确认所述第i个第一小区的链路恢复失败。
  46. 根据权利要求40至45中任一项所述的装置，其特征在于，所述第一请求消息的响应消息为以下的任意一种：
    专用搜索空间内的下行控制信息DCI；或
    专用控制资源集合的DCI；或
    专用无线网络临时标识RNTI加扰的DCI；或
    包含预设状态值的DCI。
  47. 一种链路失败恢复的装置，其特征在于，包括：
    处理单元，用于确定L个第一小区链路失败；
    通信单元，用于发送第一请求消息，所述第一请求消息包括第一指示信息，所述第一指示信息用于指示所述L个第一小区的小区信息，L≥1，且L为整数；
    其中，所述第一指示信息包括第一部分内容和/或第二部分内容，所述第一部分内容用于指示所述L个第一小区的小区标识，所述第二部分内容用于指示是否没有满足第一预设条件的第一参考信号。
  48. 根据权利要求47所述的装置，其特征在于，
    所述第二部分内容用于指示所述L个第一小区中的每个第一小区是否没有满足第一预设条件的第一参考信号；或者
    第二部分内容用于指示所述L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
  49. 根据权利要求47或48所述的装置，其特征在于，所述通信单元还用于：
    发送第二请求消息，所述第二请求消息包括第二指示信息，所述第二指示信息用于指示恢复所述L个第一小区的参考信号的信息。
  50. 根据权利要求49所述的装置，其特征在于，所述第一指示信息和第二指示信息独立编码。
  51. 根据权利要求49或50所述的装置，其特征在于，所述第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
  52. 根据权利要求49或50所述的装置，其特征在于，当所述第二部分内容指示第一状态时，不发送所述第二请求消息，所述第一状态为所述L个第一小区中的每个小区都没有满足所述第一预设条件的第一参考信号的状态。
  53. 根据权利要求49至52中任一项所述的装置，其特征在于，当所述第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，所述第二指示信息指示恢复所述第i个第一小区的第二参考信号的信息，所述第一状态为所述L个第一小区中的第i个第一小区没有满足所述第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
  54. 根据权利要求49至52中任一项所述的装置，其特征在于，当所述第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，所述第二指示信息用于指示恢复所述第j个第一小区的第一参考信号的信息，其中，所述第二状态为所述L个第一小区中的第j个第一小区有满足所述第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数。
  55. 根据权利要求49至52中任一项所述的装置，其特征在于，所述第二指示信息指示的第w个参考信号对应于所述第一部分内容指示的所述L个第一小区的第w个小区，1≤w≤L，且w为整数。
  56. 一种链路失败恢复的装置，其特征在于，包括：
    通信单元，用于接收第一请求消息，所述第一请求消息包括第一指示信息，所述第一指示信息用于指示L个第一小区的小区信息，所述L个小区为发生链路失败的小区，L≥1，且L为整数，其中，所述第一指示信息包括第一部分内容和/或第二部分内容，所述第一部分内容用于指示所述L个第一小区的小区标识，所述第二部分内容用于指示是否没有满足第一预设条件的第一参考信号；
    处理单元，用于根据所述第一请求消息，确定所述L个第一小区的小区信息。
  57. 根据权利要求56所述的装置，其特征在于，
    所述第二部分内容用于指示所述L个第一小区中的每个第一小区是否没有满足第一预设条件的第一参考信号；或者
    第二部分内容用于指示所述L个第一小区中的所有第一小区是否全都没有满足第一预设条件的第一参考信号。
  58. 根据权利要求56或57所述的装置，其特征在于，所述通信单元还用于：
    发送第二请求消息，所述第二请求消息包括第二指示信息，所述第二指示信息用于指示恢复所述L个第一小区的参考信号的信息。
  59. 根据权利要求58所述的装置，其特征在于，所述第一指示信息和第二指示信息独立编码。
  60. 根据权利要求58或59所述的装置，其特征在于，所述第一指示信息和第二指示信息承载在相同的信道，或者承载在不同的信道。
  61. 根据权利要求58或59所述的装置，其特征在于，当所述第二部分内容指示第一状态时，所述通信单元不发送所述第二请求消息，所述第一状态为所述L个第一小区中的每个小区都没有满足所述第一预设条件的第一参考信号的状态。
  62. 根据权利要求58或59所述的装置，其特征在于，当所述第二部分内容指示L个第一小区中的第i个第一小区的第一状态时，所述第二指示信息指示恢复所述第i个第一小区的第二参考信号的信息，所述第一状态为所述L个第一小区中的第i个第一小区没有满足所述第一预设条件的第一参考信号的状态，1≤i≤L，且i为整数。
  63. 根据权利要求58至62中任一项所述的装置，其特征在于，当所述第二部分内容指示L个第一小区中的第j个第一小区的第二状态时，所述第二指示信息用于指示恢复所述第j个第一小区的第一参考信号的信息，其中，所述第二状态为所述L个第一小区中的第j个第一小区有满足所述第一预设条件的第一参考信号的状态，1≤j≤L，且j为整数。
  64. 根据权利要求58至62中任一项所述的装置，其特征在于，所述第二指示信息指示的第w个参考信号对应于所述第一部分内容指示的所述L个第一小区的第w个小区，1≤w≤L，且w为整数。
  65. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被执行时，实现如权利要求1至32中任意一项所述的方法。
  66. 一种芯片系统，其特征在于，所述芯片系统包括：
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得安装有所述芯片系统的通信设备执行如权利要求1至32中任意一项所述的方法。
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