WO2019101018A1 - 一种链路恢复方法、终端设备及网络设备 - Google Patents

一种链路恢复方法、终端设备及网络设备 Download PDF

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Publication number
WO2019101018A1
WO2019101018A1 PCT/CN2018/116005 CN2018116005W WO2019101018A1 WO 2019101018 A1 WO2019101018 A1 WO 2019101018A1 CN 2018116005 W CN2018116005 W CN 2018116005W WO 2019101018 A1 WO2019101018 A1 WO 2019101018A1
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Prior art keywords
signaling
reference signals
resources
reference signal
terminal device
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PCT/CN2018/116005
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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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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112020010608-9A priority Critical patent/BR112020010608A2/pt
Priority to CN201880076529.8A priority patent/CN111386741B/zh
Priority to EP18880980.0A priority patent/EP3716706A4/en
Publication of WO2019101018A1 publication Critical patent/WO2019101018A1/zh
Priority to US16/883,683 priority patent/US11290199B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a link recovery method, a terminal device, and a network device.
  • a beam In the channel of the high frequency band, a beam is usually used as a signal bearer.
  • the diffracting power of the beam under the high frequency channel is poor.
  • the communication When the beam is blocked, the communication will be in the middle, and the communication link needs to be quickly restored.
  • the base station In order to quickly restore the communication link, the base station needs to configure a candidate beam identification reference signal set for the terminal device to restore the communication link between the terminal device and the network device.
  • the base station configures a non-contention random access channel (RACH) resource for each reference signal in the candidate reference signal set.
  • RACH non-contention random access channel
  • the terminal device uses the candidate reference signal set.
  • the RACH resource transmission beam failure recovery request/beam failure recovery request when the base station receives the beam failure recovery request/link failure recovery request, resumes the communication link.
  • the candidate reference signal set will contain multiple reference signals. Since the base station configures the RACH resource for each reference signal, the more reference signals in the candidate reference signal set, the more RACH resources are needed, which causes a problem of large uplink resource overhead.
  • the embodiment of the present invention provides a link recovery method, which is used to solve the technical problem that the uplink resource overhead in the prior art is large.
  • the embodiment of the present application provides a link recovery method, in which a network device first configures, for a terminal device, M resources for carrying a link recovery request signal and N1 first reference signals, the chain.
  • the path recovery request signal is used to recover a signal of the communication link or re-allocate a new link when the communication link between the terminal device and the network device fails, the M resources being associated with the N1 first reference signals
  • the first reference signal is used to identify the new link, and then the configuration information of the M resources is indicated to the terminal device by using the first signaling, and then the terminal device uses the N1 first reference signals and the N2 a second reference signal, and/or determining, according to the N1 first reference signal and the N3 third reference signals, P resources for carrying a link recovery request signal from the M resources, and from the P for the bearer chain
  • At least one resource is selected from the resources of the path recovery request signal for carrying and transmitting the link recovery request signal, where the M resources include the P resources, and the second reference signal is used to detect
  • the multiple reference signals and resources are also used.
  • Performing further screening for example, screening the plurality of reference signals for link failure detection and/or a partial reference signal that satisfies a QCL hypothesis relationship with the PDCCH and resources associated with the partial reference signal, so that the network device and the terminal device may Only the part of the plurality of reference signals and corresponding resources are used to recover the communication link, and for the filtered reference signal, it is naturally unnecessary to occupy resources for carrying the link recovery request signal, for example, screening can be performed.
  • the resource for carrying the link recovery request signal corresponding to the reference signal is released, so that the overhead of the uplink resource can be saved without affecting the success rate of the communication link recovery.
  • the P resources are associated with a reference signal other than the target reference signal of the N1 first reference signals, where the target reference signal is the N2 second reference signals. At least one of the reference signals and/or at least one of the N3 third reference signals. Or the P resources are at least one of the M resources that are not associated with the target reference signal of the N1 first reference signals, or the P resources are the M resources At least one of the resources associated with the reference signal other than the target reference signal among the N1 first reference signals.
  • the target reference signal is first filtered out from the N1 first reference signals, and then the resources associated with the remaining reference signals in the N1 first reference signals are the P resources.
  • the second signaling sent by the network device to the terminal device indicates the N3 third reference signals, wherein at least one of the N3 third reference signals is the target reference signal, and the terminal device receives the second signaling.
  • the network device indicates the third reference signal that satisfies the QCL hypothesis relationship with the PDCCH to the terminal device, so that the terminal device determines the target reference signal according to the third reference signal.
  • the network device may indicate other content by using the second signaling, and may also indicate other content, for example:
  • the second signaling is used to indicate that the terminal device detects a link failure by using the target reference signal in the N1 first reference signals;
  • the second signaling is used to indicate that the terminal device detects the link failure by using the N3 third reference signals; or
  • the second signaling is used to indicate QCL information of the N2 second reference signals.
  • the second signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the second signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the third signaling sent by the network device to the terminal device indicates the N2 second reference signals, wherein at least one of the N2 second reference signals is the target reference signal, and the terminal device receives the third signaling.
  • the network device indicates the second reference signal for detecting the link failure to the terminal device, so that the terminal device determines the target reference signal according to the second reference signal.
  • the network device may indicate other content by using the third signaling, and may also indicate other content, for example:
  • the third signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the third signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the terminal device can also determine P resources in other ways, for example:
  • the fourth signaling sent by the network device to the terminal device indicates K1 first reference signals, where the P resources are associated with the K1 first reference signals, and the N1 first reference signals include the K1 first reference signals,
  • the K1 is an integer greater than or equal to 1 and less than or equal to N1, and the terminal device receives the fourth signaling.
  • the fifth signaling that is sent by the network device to the terminal device, where the terminal device selects at least one resource for carrying and sending the link recovery request signal
  • the fifth signaling indicates K2 first reference signals, where the P resources are associated with at least one first reference signal of the N1 first reference signals except the K2 first reference signals, where The N1 first reference signals include the K2 first reference signals, and the K2 is an integer greater than or equal to 1 and less than or equal to N1, and the terminal device receives the fifth signaling.
  • the sixth signaling that is sent by the network device to the terminal device.
  • the sixth instruction indicates L resources for carrying a link recovery request signal, where the P resources are resources other than the L resources or the P resources of the M resources are the L And the terminal device receives the sixth signaling.
  • the terminal device can directly determine P resources according to the signaling sent by the network device, thereby reducing the calculation amount of the terminal device, and reducing the length of time required for link recovery.
  • the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, and the sixth signaling At least one of layer-1 signaling, layer 2 signaling, and layer 3 signaling, respectively.
  • the signaling type of each signaling may be at least one of layer-one signaling, layer two signaling, and layer three signaling, and the network device may be flexibly configured.
  • the embodiment of the present application provides a link recovery method, in which a network device first configures, for a terminal device, M resources for carrying a link recovery request signal and N1 first reference signals, the chain.
  • the path recovery request signal is used to recover a signal of the communication link or re-allocate a new link when the communication link between the terminal device and the network device fails, the M resources being associated with the N1 first reference signals
  • the first reference signal is used to identify the new link, and then the configuration information of the M resources is indicated to the terminal device by using the first signaling, and then the terminal device uses the N1 first reference signals and the N2 a second reference signal, and/or determining, according to the N1 first reference signal and the N3 third reference signals, S resources that are not used to carry the link recovery request signal, and using the M resources At least one resource other than the resource for carrying the link recovery request signal and carrying the link recovery request signal, where the second reference signal is used to detect the link failure, Three reference signal and a PDCCH satisfying relationships assumed quasi co
  • the multiple reference signals and resources are also used.
  • Performing further screening for example, releasing the plurality of reference signals for link failure detection and/or a partial reference signal that satisfies a QCL hypothesis relationship with the PDCCH and resources associated with the partial reference signal, so that the network device and the terminal device may only The communication link is restored by using the plurality of reference signals and a part of the corresponding resources, so that the overhead of the uplink resource can be saved without affecting the success rate of the communication link recovery.
  • the network device sends a second signaling to the terminal device, the second signaling indicates the N3 third reference signals, and the network device releases the at least one a reference signal associated with a resource for carrying a link recovery request signal, wherein at least one of the N3 third reference signals is the target reference signal.
  • the terminal device determines the target reference signal according to the second signaling.
  • the network device indicates, to the terminal device, a third reference signal that the PDCCH meets the QCL hypothesis relationship, so that the network device can release the resource associated with the target reference signal according to the third reference signal, and the terminal device according to the third reference The signal determines the target reference signal.
  • the network device may indicate other content by using the second signaling, and may also indicate other content, for example:
  • the second signaling is used to indicate that the terminal device detects a link failure by using the target reference signal in the N1 first reference signals;
  • the second signaling is used to indicate that the terminal device detects a link failure by using at least one of the N3 third reference signals;
  • the second signaling is used to indicate QCL information of the N2 second reference signals.
  • the second signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the second signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the network device sends a third signaling to the terminal device, where the third signaling indicates the N2 second reference signals, where the N2 second reference signals At least one of the reference signals is the target reference signal; the network device releases a resource associated with the at least one reference signal for carrying a link recovery request signal. After receiving the third signaling, the terminal device determines the target reference signal according to the third signaling.
  • the network device indicates the second reference signal for detecting the link failure to the terminal device, so that the network device can release the resource associated with the target reference signal according to the second reference signal, and the terminal device according to the second reference The signal determines the target reference signal.
  • the network device may indicate the second reference signal by using the third signaling, and may also indicate other content, for example, the third signaling is used to indicate that the terminal device prohibits using the The target reference signal identifies the new link; or,
  • the third signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the terminal device and the network device can also determine S resources by other means, for example:
  • the network device sends fourth signaling to the terminal device, where the fourth signaling indicates K1 first reference signals, where the N1 first reference signals are excluded.
  • the reference signals other than the K1 first reference signals are the target reference signals, and the N1 first reference signals include the K1 first reference signals, and the K1 is an integer greater than or equal to 1 and less than or equal to N1;
  • the network device releases resources for carrying a link recovery request signal associated with the first reference signal other than the K1 first reference signals of the N1 first reference signals.
  • the terminal device determines the target reference signal according to the fourth signaling.
  • the network device sends a fifth signaling to the terminal device, where the fifth signaling indicates K2 first reference signals, where the K2 first reference signals are Deriving a target reference signal, the N1 first reference signals comprising the K2 first reference signals; the network device releasing resources associated with the K2 first reference signals for carrying a link recovery request signal.
  • the terminal device determines the target reference signal according to the fifth signaling.
  • the network device sends a sixth signaling to the terminal device, where the sixth signaling indicates L resources for carrying a link recovery request signal, where the S The resource is the resource other than the L resources or the S resources of the M resources, and the network device releases resources other than the L resources among the M resources. Or release the L resources.
  • the terminal device determines the target reference signal according to the sixth signaling.
  • the terminal device can directly determine P resources according to the signaling sent by the network device, thereby reducing the calculation amount of the terminal device, and reducing the length of time required for link recovery.
  • the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, and the sixth signaling At least one of layer-1 signaling, layer 2 signaling, and layer 3 signaling, respectively.
  • the signaling type of each signaling may be at least one of layer-one signaling, layer two signaling, and layer three signaling, and the network device may be flexibly configured.
  • the embodiment of the present application provides a reference signal determining method, where the method includes: the terminal device receives a second signaling sent by the network device, where the second signaling indicates N3 third references. a signal, the third reference signal and the physical downlink control channel PDCCH satisfy a quasi co-location QCL hypothesis relationship; the terminal device determines that at least one of the N3 third reference signals is prohibited for restoring the terminal The reference signal of the communication link between the device and the network device or the terminal device determines that at least one of the N3 third reference signals is a reference signal for detecting a link failure.
  • the terminal device may implicitly indicate the N3 third reference signals according to the physical downlink control channel PDCCH QCL information indicated by the network device, thereby saving signaling overhead.
  • the second signaling may implicitly indicate other content, in addition to indicating the third reference signal, for example:
  • the second signaling is used to instruct the terminal device to detect a link failure by using the at least one reference signal in the N1 first reference signals, where the first reference signal is used to identify a new link; or
  • the second signaling is used to indicate that the terminal device detects the link failure by using the N3 third reference signals; or
  • the second signaling is used to indicate QCL information of the N2 second reference signals.
  • the second signaling can simultaneously indicate multiple types of information, signaling and resource overhead can be saved.
  • the second signaling is used to indicate that the terminal device prohibits using the at least one reference signal to identify a new link
  • the second signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the at least one reference signal in the N1 first reference signals.
  • the embodiment of the present application provides a reference signal determining method, where the method includes: the terminal device receives a third signaling sent by the network device, where the third signaling indicates N2 second references. a signal, the second reference signal is used to detect a link failure; the terminal device determines that at least one of the N2 second reference signals is prohibited for restoring the terminal device and the network device Reference signal for the communication link between.
  • the terminal device may determine, according to the reference signal used by the network device to detect the link failure, a reference signal that cannot be used to restore the communication link between the terminal device and the network device, and the processing method Simple, it can reduce the amount of computing of the terminal device.
  • the third signaling may implicitly indicate other content, in addition to indicating the second reference signal, for example:
  • the third signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the third signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the embodiment of the present application provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the foregoing first aspect and the second aspect method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the terminal device includes a processor and a transceiver, the processor being configured to support the terminal device to perform the corresponding functions in the first aspect and the second aspect method described above.
  • the transceiver is configured to support communication between the terminal device and other devices, and to transmit or receive information or instructions involved in the method of the first aspect described above to other devices.
  • the terminal device can also include a memory for coupling with the processor that holds the necessary program instructions and data.
  • the embodiment of the present application provides a network device, where the network device has a function of implementing the behavior of the network device in the foregoing first aspect and the method in the second aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the network device includes a processor and a transceiver configured to support the network device to perform the corresponding functions of the first aspect and the second aspect method described above.
  • the transceiver is configured to support communication between a network device and other devices, and to transmit or receive information or instructions involved in the method of the first aspect described above to other devices.
  • the network device can also include a memory for coupling with the processor that holds the necessary program instructions and data.
  • the embodiment of the present application provides a computer storage medium, configured to store computer software instructions for performing the foregoing first aspect, any one of the first aspect, and the second aspect, and includes A program designed to perform any of the above first aspect, the first aspect, and the method of the second aspect described above.
  • an embodiment of the present application provides a computer program product, where the computer program product includes instructions, when the instruction is run on a computer, causing the computer to perform any of the first aspect and the first aspect.
  • the embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support the terminal device to implement the foregoing first aspect and the method described in the second aspect, or to support the network device to implement the foregoing In one aspect and the method of the second aspect, for example, generating or processing data and/or information involved in the above methods.
  • the chip system also includes a memory for storing program instructions and data necessary for the mobile edge computing device or network device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a measurement process of channel quality in the prior art
  • 3A-3B are flowcharts of a link recovery method according to an embodiment of the present application.
  • 4 to 7 are schematic diagrams of four cases of a target reference signal in an embodiment of the present application.
  • FIG. 8 to FIG. 17 are schematic diagrams showing examples of target reference signals in an embodiment of the present application.
  • 18A, 18B, and 18C are schematic diagrams of another example of a target reference signal in an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 21 is a schematic diagram of another possible structure of a network device according to an embodiment of the present application.
  • FIG. 22 is another schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, for example, New Radio (NR) system, Wireless Fidelity (WiFi), Worldwide Interoperability for Microwave Access (WiMAX), and the whole world.
  • Global System of Mobile communication (GSM) system Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (General Packet) Radio Service, GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), and third generation The 3rd Generation Partnership Project (3GPP) related cellular system and the like, and the fifth generation mobile communication system (The Fifth Generation, 5G) and the like.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • General Packet Radio Service General Packet Radio Service
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced
  • a network device for example comprising a base station (e.g., an access point), may refer to a device in the access network that communicates over the air interface with the wireless terminal device over one or more sectors.
  • the network device can be used to convert the received air frame to the IP packet as a router between the terminal device and the rest of the access network, wherein the remainder of the access network can include an IP network.
  • Network devices can also coordinate attribute management of air interfaces.
  • the base station may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a Long Term Evolution (LTE) system or an evolved LTE system (LTE-A), or
  • NodeB or eNB or e-NodeB, evolutional Node B in a Long Term Evolution (LTE) system or an evolved LTE system (LTE-A), or
  • LTE Long Term Evolution
  • LTE-A evolved LTE system
  • the next generation node B (gNB) in the 5G system may be included in the embodiment of the present application.
  • a terminal device including a device that provides voice and/or data connectivity to a user, for example, may include a handheld device having a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a Radio Access Network (RAN) to exchange voice and/or data with the RAN.
  • the terminal device may include a user equipment (User Equipment, UE), a wireless terminal device, a mobile terminal device, a Subscriber Unit, a Subscriber Station, a mobile station, a mobile station, and a remote station.
  • Station Remote Station
  • AP Access Point
  • Remote Terminal Access Terminal
  • User Terminal User Agent
  • User Equipment User Equipment
  • a mobile phone or "cellular” phone
  • a computer with a mobile terminal device a portable, pocket, handheld, computer built-in or in-vehicle mobile device, smart wearable device, and the like.
  • PCS Personal Communication Service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • Smart Watches smart helmets, smart glasses, smart bracelets, and other equipment.
  • restricted devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing capabilities. Examples include information sensing devices such as bar codes, radio frequency identification (RFID), sensors, global positioning systems (GPS), and laser scanners.
  • RFID radio frequency identification
  • GPS global positioning systems
  • Beam is a communication resource.
  • the beam can be a wide beam, or a narrow beam, or other type of beam.
  • the beamforming technique can be beamforming techniques or other technical means.
  • the beamforming technology can be specifically a digital beamforming technique, an analog beamforming technique, and a hybrid digital/analog beamforming technique. Different beams can be considered as different resources.
  • the same information or different information can be transmitted through different beams. Alternatively, multiple beams having the same or similar communication characteristics can be considered as one beam.
  • One beam may include one or more antenna ports for transmitting a data channel, a control channel, a sounding signal, etc., for example, the transmitting beam may be a signal intensity distribution formed in different directions of the space after the signal is transmitted through the antenna.
  • the receive beam may refer to a signal strength distribution of wireless signals received from the antenna in different directions in space. It can be understood that one or more antenna ports forming one beam can also be regarded as one antenna port set.
  • the “beam” may also be referred to as “reference signal” or “formed beam”. That is to say, the name of the "beam” is not limited herein, as long as the above concept is expressed.
  • a beam pair typically includes a transmit beam at the transmitter and a receive beam at the receiver.
  • a beam pair may include a transmit beam of a base station and a receive beam of a UE.
  • the QCL may include some spatial characteristic parameters, such as starting angle related parameters. For example, Azimuth angle of Departure (AoD), Zenith angle of Departure (ZoD), Azimuth angle spread of Departure (ASD), Vertical angle expansion (Zenith angle) Spread of Departure, ZSD); or arrival angle related parameters, for example, Azimuth angle of Arrival (AoA), Zenith angle of Arrival (ZoA), Azimuth angle spread of Arrival, ASA), Zenith angle spread of Arrival (ZSA), Spatial Rx parameter, Delay Spread, Doppler Spread, Doppler Shift, Average Gain, and Average Delay.
  • spatial characteristic parameters describe the spatial channel characteristics between the reference signal antenna ports. Thereby, the assistance of the beamforming or receiving process of the receiving side of the terminal device can be completed.
  • the spatial characteristic parameter included in the QCL may also be other parameters than the above parameters, and is not limited herein.
  • a random access channel (RACH) resource for example, may be a physical random access channel (PRACH) resource or a physical uplink control channel (PUCCH), of course, It can also be other channel resources.
  • the resource is composed of a time-frequency code.
  • Beam state information also known as beam measurement information, may also be other names, including beam index, reference signal received power (RSRP) of the beam, and reference signal reception.
  • Reference signal receiving quality (RSRQ), signal to interference plus noise ratio (SINR), signal-to-noise ratio (SNR), channel quality indicator (CQI)
  • SNR signal-to-noise ratio
  • CQI channel quality indicator
  • at least one of the hypothetical PDCCH block error rate hyper PDCCH block error rate
  • other parameters may be included, and are not limited herein.
  • Communication link failure It may also be referred to as any one of a communication link failure, a communication link failure, a beam failure, a beam failure, a link failure, a link failure, a communication failure, a communication failure, and the like.
  • the communication link failure may be, for example but not limited to, including one of the following situations: 1 a beam failure occurs when the network device transmits the PDCCH information and the beam quality of the terminal receiving the PDCCH information is low enough, that is, a beam pair for transmitting the PDCCH The communication link fails when the quality of the quality drops low enough.
  • the quality is reduced sufficiently low, for example, but not limited to, that the quality of the signal received by the terminal is less than a threshold, or that the terminal is unable to receive the signal within a predetermined time window.
  • the network device configures a reference signal resource that meets a quasi-co-located QCL relationship with the control channel. When the channel quality of the reference signal resource is lower than a threshold, the communication failure is considered.
  • the threshold e.g., the threshold in 12 above
  • the threshold is less than or equal to the threshold of the channel quality set when the communication between the terminal and the network device is resumed.
  • Link recovery request signal used to recover the communication link or re-allocate the new link when the communication link between the terminal device and the network device fails, or after the communication link fails. Any of the beam recovery request signal, beam failure recovery request signal, link failure recovery request signal, link reconfiguration signal, link failure reconfiguration signal, link reconfiguration request signal, and link failure reconfiguration request signal One, of course, can have other names, and there are no restrictions here.
  • FIG. 1 is an application scenario of an embodiment of the present application.
  • a base station and a terminal device located in the coverage of the base station are included.
  • the base station and the terminal device perform data transmission through multiple beam pairs.
  • the base station sends downlink data to the terminal device through the downlink transmission beam 1, and the terminal device
  • the downlink data sent by the base station is received by the uplink receiving beam 2.
  • beamforming is usually used in wireless communication systems.
  • Techniques to compensate for the aforementioned losses in the propagation process for example, using a beamforming based reference signal transmission mechanism for data transmission, wherein the beamformed reference signals may include broadcast channels, synchronization signals, and cell-specific reference signals, etc. .
  • the terminal device When the reference signal is transmitted based on the beamforming technology, once the terminal device moves, the direction of the shaped beam corresponding to the transmission signal may no longer match the position of the mobile terminal device, and therefore, the terminal device communicates with the base station. In the case, frequent switching between different shaped beams is required. In order to ensure the success rate of the switching between the shaped beams, it is necessary to obtain the channel quality corresponding to each of the shaped beams before the switching. For example, the channel quality may be measured by the terminal device based on the beam-formed synchronization signal or the cell-specific reference signal, and then the terminal device reports the measurement result to the base station through the physical uplink control channel or the physical uplink shared channel.
  • the measurement process of the channel quality is as shown in FIG. 2: First, the base station sends multiple shaped beams to the terminal device, and then the terminal device measures multiple shaped beams sent by the base station, and selects W shapes with better measurement results. The beam and the BSI of the better W shaped beams are reported to the base station. As shown in FIG. 2( a ), the W shaped beams are downlink transmission beams of the base station. Then, the base station separately trains multiple uplink and downlink transmit beams, and determines a receive beam corresponding to the uplink and downlink transmit beams. As shown in FIG. 2(e) and FIG. 2(f), the downlink transmit beam and the downlink receive beam are completed. measuring. The measurement of the uplink transmit beam and the uplink receive beam is performed in the same manner, as shown in FIG. 2(b), FIG. 2(c), and FIG. 2(d), and details are not described herein again.
  • the base station After completing the foregoing measurement process, the base station acquires N beam pairs BPL that are better in communication with the terminal device, and the N beam pairs BPL can be used for downlink transmission or for uplink transmission, for example, the N beam pairs BPL.
  • Bx represents the transmit beam of the base station, that is, the downlink transmit beam
  • B'x represents the receive beam of the terminal device, that is, the downlink receive beam.
  • B'y represents the receive beam of the base station, that is, the uplink receive beam.
  • the candidate reference signal set is determined from the plurality of beam pairs BPL.
  • the configuration of the candidate reference signal set is not limited to this manner, and is not mentioned here.
  • the base station configures a corresponding uplink resource, such as a random access resource or a physical uplink control channel resource, for each reference signal in the candidate reference signal set.
  • the base station needs to recover and The communication connection of the base station, at this time, the downlink failure is resumed by transmitting a beam failure recovery request/link failure recovery request by the RACH resource associated with one or more reference signals in the candidate reference signal set.
  • the candidate reference signal set usually includes multiple reference signals, and multiple reference signals need to be configured with more RACH resources, thereby causing a problem of large uplink resource overhead.
  • the embodiment of the present invention provides a link recovery method, in which a network device first configures, for a terminal device, M resources for carrying a link recovery request signal and N1 first reference signals, the link.
  • the recovery request signal is used to recover a signal of the communication link or re-allocate a new link when the communication link between the terminal device and the network device fails, the M resources being associated with the N1 first reference signals,
  • the first reference signal is used to identify a new link, and then the configuration information is indicated to the terminal device by using the first signaling, and then the terminal device according to the N1 first reference signals and the N2 second reference signals, and And determining, according to the N1 first reference signal and the N3 third reference signals, P resources for carrying a link recovery request signal from the M resources, and recovering the request signal from the P for the bearer link recovery request signal Selecting at least one resource for carrying and transmitting the link recovery request signal, where the M resources include the P resources, the second reference signal is used to detect a link failure, and the third reference signal
  • the multiple reference signals and resources are also used.
  • Performing further screening for example, screening the plurality of reference signals for link failure detection and/or a partial reference signal that satisfies a QCL hypothesis relationship with the PDCCH and resources associated with the partial reference signal, so that the network device and the terminal device may Only the part of the plurality of reference signals and corresponding resources are used to recover the communication link, and for the filtered reference signal, it is naturally unnecessary to occupy resources for carrying the link recovery request signal, for example, screening can be performed.
  • the resource for carrying the link recovery request signal corresponding to the reference signal is released, so that the overhead of the uplink resource can be saved without affecting the success rate of the communication link recovery.
  • the technical solution provided by the embodiment of the present application is described in the following with reference to the accompanying drawings.
  • the technical solution provided by the present invention is applied to the application scenario shown in FIG. 1 , where the network device is the base station and the terminal device is the UE. For example.
  • FIG. 3 is a link recovery method according to an embodiment of the present application. The process of the method is described as follows:
  • Step 31 The base station sends the first signaling to the UE.
  • the first signaling is used to configure M resources for carrying a link recovery request signal, where the link recovery request signal is used for a communication link failure between the terminal device and the network device. Recover the signal of the communication link or reconfigure the new link.
  • the link recovery request signal may also be referred to as a link reconfiguration request signal, and the first signaling may be media access control (CE-CE) signaling, or may be downlink control information (downlink control) Information, DCI) signaling, or may be radio resource control (RRC) signaling, which is not limited herein.
  • CE-CE media access control
  • DCI downlink control information
  • RRC radio resource control
  • the signal will be referred to as a link recovery request signal as an example for description.
  • the resource used for carrying the link recovery request signal may be a PUCCH resource or a PRACH resource or other channel resource.
  • the resource for carrying the link recovery request signal is a PRACH resource as an example.
  • the base station may randomly select a part of the multiple PRACH resources as the resource used by the UE to carry the link recovery request signal, and may also configure the M resources for the UE in other manners, which is not limited herein.
  • the base station uses the channel resources corresponding to the multiple reference signals as the M resources for carrying the link recovery request signal.
  • the base station may further include step 32: the base station configures M resources for the UE.
  • the base station may first configure multiple reference signals for the UE, and then configure the M resources according to the reference signal, where the reference signal may include N1 first reference signals, N2 second reference signals, and N3.
  • a third reference signal The base station can configure the three reference signals for the UE at the same time, or configure the first reference signal first, then configure the second reference signal, and finally configure the third reference signal, or configure the second reference signal first, and then configure the third.
  • the reference signal is finally configured with the first reference signal, that is, the order in which the three reference signals are configured is not limited.
  • the base station may also determine the reference signal for other purposes.
  • the N1 first reference signal, the N2 second reference signals, and the N3 third reference signals are configured by using the base station as the UE.
  • M, N1, N2, and N3 are integers greater than or equal to 1.
  • the first reference signal is used to identify a new link, wherein the UE can identify the new link, that is, the UE can select the PRACH corresponding to the one or more first reference signals that meet the preset condition by measuring the quality of the N1 first reference signals.
  • the process of determining the resource as a new link for the UE and the base station to communicate, the preset condition may be higher than a preset threshold.
  • the first reference signal may also be referred to as a reference signal configured by the base station for the UE to recover the communication link between the UE and the base station, and may also be referred to as a reference signal whose channel quality satisfies a predetermined threshold condition.
  • the predetermined threshold condition may be a value greater than or equal to a specific parameter.
  • the threshold condition may be set based on the BSI of the reference signal. Taking the RSPR as an example, the predetermined threshold condition may be an RSPR greater than or equal to -60 dBm. Of course, other threshold conditions are also possible, and no limitation is imposed here.
  • the second reference signal is used to detect the link failure, that is, the UE can determine whether the communication link between the UE and the base station fails by detecting the channel quality of the second reference signal, when the channel quality of all the second reference signals is lower than the pre- When the threshold is set, or when the channel quality of the preset number of second reference signals in the N2 second reference signals is lower than a preset threshold, it is determined that the communication link between the UE and the base station fails.
  • the second reference signal is a reference signal that satisfies the QCL hypothesis relationship with the DMRS of the PDCCH, and details are not described herein again.
  • the third reference signal is a reference signal that satisfies a quasi-co-located QCL hypothesis relationship with a physical downlink control channel (PDCCH), that is, a reference that satisfies the QCL hypothesis relationship with a demodulation reference signal (DMRS) of the PDCCH. signal.
  • PDCCH physical downlink control channel
  • DMRS demodulation reference signal
  • the base station configures the M resources for carrying the link recovery request signal for the UE according to the first reference signal of the multiple reference signals.
  • the M resources configured for the UE to carry the link recovery request signal are associated with the N1 first reference signals. That is, the reference signal in the N1 first reference signals has a one-to-one correspondence with the PRACH resources, and the plurality of first reference signals in the N1 first reference signals may be configured to be the same PRACH resource, or the base station may be one.
  • the first reference signal is configured with multiple PRACH resources, which are not limited herein.
  • the first signaling sent by the base station may only indicate M resources, and the UE may learn the configuration of the base station according to the M resources. N1 first reference signals; or the base station may simultaneously indicate M resources and N1 first reference signals in the first signaling, which is not limited in the embodiment of the present application.
  • Step 33 The UE selects at least one resource from the P resources for carrying the link recovery request signal to carry and send the link recovery request signal.
  • the UE learns the M resources configured by the base station. If the M resources are used to recover the communication link between the UE and the base station, if the M resources are occupied, for example, a reference signal corresponding to a certain one of the M resources is used to detect the UE and the base station. Whether the communication link between the two fails or the reference signal corresponding to the certain resource meets the QCL hypothesis relationship, when the UE fails to perform a link with the base station, the UE may not be able to use the resource to quickly resume communication with the base station.
  • the P resources need to be selected from the M resources to carry the link recovery request signal, so that when the UE determines the communication link with the base station, When it fails, one or more resources are selected from the P resources to send the link request signal.
  • the M resources include the P resources, and the P resources are determined in the following two manners:
  • the P resources are resources determined by the UE according to the N1 first reference signals and the N2 second reference signals, and/or the P resources are resources determined by the UE according to the N1 first reference signal and the N3 third reference signals.
  • P is an integer greater than or equal to 1 and less than M.
  • the P resources may be determined by the UE according to the first reference signal and the second reference signal, or may be determined by the UE according to the first reference signal and the third reference signal, or may be determined by the UE according to the first reference signal.
  • the second reference signal and the third reference signal are determined.
  • the P resources are determined by the UE according to an instruction sent by the base station.
  • the base station may indicate a part of resources to the UE, where the resources are P resources, or the remaining resources of the M resources except the part of the resources indicated by the base station are P resources.
  • the P resources are associated with a reference signal other than the target reference signal of the N1 first reference signals, wherein the target reference signal is at least one of the N2 second reference signals and/or the N3 At least one of the third reference signals.
  • the P resources are at least one of the M resources that are not associated with the target reference signal in the N1 first reference signals, or the P resources are the N resources and the N1 At least one of the resources associated with the reference signal other than the target reference signal among the first reference signals.
  • resources associated with the second reference signal and/or the third reference signal among the M resources are removed, so that the UE recovers the communication link only by using the remaining resources, so that N1 first
  • the reference signal in the reference signal that is identical to the second reference signal and/or the third reference signal also does not need to occupy resources for carrying the link recovery request signal, thereby reducing the overhead of the uplink resource.
  • the target reference signal may have the following four situations:
  • the target reference signal is a reference signal for link failure detection in the first reference signal.
  • the target reference signal is the intersection of the N1 first reference signals and the N2 second reference signals. Referring to FIG. 4, it is assumed that N1 first reference signals form a set A, and N2 second reference signals form a set B, and the target reference signal is a reference signal included in the set C.
  • the target reference signal is a reference signal in the first test signal that satisfies the QCL hypothesis relationship with the PDCCH.
  • the target reference signal is the intersection of the N1 first reference signals and the N3 third reference signals. Referring to FIG. 5, it is assumed that N1 first reference signals form a set A, and N3 third reference signals form a set D, and the target reference signal is a reference signal included in the set E.
  • the target reference signal is a reference signal in the first reference signal that can be used for both link failure detection and the PDCCH to satisfy the QCL hypothesis relationship.
  • the target reference signal is an intersection of N1 first reference signals and N2 second reference signals and N3 third reference signals. Referring to FIG. 6, it is assumed that N1 first reference signals form a set A, N3 third reference signals form a set D, and N2 second reference signals form a set B, and the target reference signal is a reference signal included in the set F.
  • the target reference signal is the sum of the reference signal in the first reference signal that satisfies the QCL hypothesis relationship with the PDCCH and the reference signal used for link failure detection in the candidate reference signal.
  • the target reference signal is the sum of two intersections
  • the first intersection is the intersection of N1 first reference signals and N2 second reference signals
  • the second intersection is N1 first reference signals and N3 The intersection of the third reference signals.
  • N1 first reference signals form a set A
  • N3 third reference signals form a set D
  • N2 second reference signals form a set B
  • the target reference signals are reference signals included in the set C and the set E. .
  • the embodiment of the present application further includes:
  • Step 34 The base station sends the second signaling or the third signaling.
  • the second signaling indicates the N3 third reference signals, wherein at least one of the N3 third reference signals is the target reference signal.
  • the signaling type of the first signaling may be RRC, and the signaling of the second signaling may be RRC or MAC-CE or DCI; the type of the first signaling may also be a MAC-CE, and the signaling type of the second signaling It can be DCI.
  • the signaling type of the third signaling refer to the second signaling, and details are not described herein again.
  • first signaling and the second signaling may be multiple signaling or one signaling.
  • the second signaling and the third signaling may also be the same signaling.
  • the second signaling may directly indicate an index or other identification information of the N3 third reference signals, or the second signaling is used to indicate QCL information of the N3 third reference signals, in the QCL information.
  • the DMRS indicating the PDCCH and the third reference signal satisfy the QCL hypothesis relationship, and indirectly indicate the third reference signal.
  • the second signaling may implicitly indicate that the same field of the second signaling may indicate N3 third reference signals, in addition to indicating the N3 third reference signals, The following information can be indicated:
  • the first type the second signaling is used to indicate that the UE detects the link failure by using the target reference signal in the N1 first reference signals.
  • the second type of signaling is used to instruct the UE to detect the link failure by using the N3 third reference signals.
  • the second signaling indicates the QCL information of the PDCCH, that is, the DMRS of the PDCCH and the N3 third reference signals satisfy the QCL relationship, and also the QCL information of the N2 second reference signals.
  • the second signaling is used to indicate that the UE prohibits the use of the target reference signal to identify the new link.
  • the fourth type the second signaling is used to instruct the UE to use the reference signal other than the target reference signal in the N1 first reference signals to identify the new link.
  • the second signaling is used to indicate that the UE detects the link failure by using the target reference signal in the N1 first reference signals, and the second signaling is used to indicate that the UE prohibits using the target reference signal to identify a new chain. road.
  • the sixth type of signaling is used to indicate that the UE detects the link failure by using the target reference signal in the N1 first reference signals, and the second signaling is used to indicate that the UE uses the N1 first reference signals.
  • the reference signal other than the target reference signal identifies the new link.
  • the seventh type the second signaling is used to indicate that the UE detects the link failure by using the N3 third reference signals, and the second signaling is used to indicate that the UE prohibits using the target reference signal to identify the new link.
  • the eighth type the second signaling is used to indicate that the UE detects the link failure by using the N3 third reference signals, and the second signaling is used to indicate that the UE uses the N1 first reference signals except the target reference signal.
  • the reference signal identifies the new link.
  • the base station may also determine the target reference signal according to the signaling, so that the base station also determines the foregoing first to eighth indication contents.
  • the second signaling is used to indicate that the UE prohibits the use of the target reference signal to identify a new link, and can be understood as the second signaling used to indicate the UE.
  • the target link is not used to identify the new link.
  • the base station determines that the target reference signal in the N1 first reference signals is used to detect the link failure, and the base station activates the target reference signal in the N1 first reference signal sets for the link failure detection.
  • the base station determines not to use the target reference signal to identify the new link, and can be understood as the base station deactivating the target reference signal in the N1 first reference signals.
  • Other indications in the signaling may be understood in the same manner, and are not described herein again.
  • the base station determines that a reference signal is not used to identify the new link, and the base station can release the resources associated with the reference signal. For example, if the base station indicates N3 third reference signals, the base station may release the PRACH resources of the N1 first reference signals associated with the reference signals that coincide in the indicated reference signals.
  • the base station deactivating the target reference signal according to the signaling or activating the target reference signal as a reference signal for link failure detection is an optional step, that is, the step is not necessarily performed.
  • the third signaling indicates the N2 second reference signals, wherein at least one of the N2 second reference signals is the target reference signal.
  • the third signaling may directly indicate an index of the N2 second reference signals or other identification information.
  • the third signaling may indicate the following information in addition to indicating the N2 second reference signals:
  • the first type the third signaling is used to indicate that the UE prohibits using the target reference signal in the N1 first reference signals to identify the new link.
  • the N2 second reference signals are determined and the reference signal used to detect the link failure in the N1 first reference signals is determined not to use to identify the new link.
  • the second type of signaling is used to instruct the UE to use the reference signal other than the target reference signal in the N1 first reference signals to identify the new link.
  • the base station may also determine the target reference signal according to the signaling, so that the base station also determines the foregoing first to second indication contents.
  • the base station determines to use the reference signal other than the target reference signal in the N1 first reference signals to identify the new link, which may be understood as the base station deactivating the target reference signal. Similarly, the base station determines not to use.
  • the target reference signal identifies a new link, which can be understood as a base station deactivating a target reference signal in the N1 first reference signals.
  • the base station determines that a reference signal is not used to identify the new link, and the base station can release the resources associated with the reference signal. For example, if the base station indicates N2 second reference signals, the base station may release the PRACH resources of the N1 first reference signals associated with the reference signals that overlap in the indicated reference signals.
  • the base station deactivating the target reference signal according to the signaling or activating the target reference signal as a reference signal for link failure detection is an optional step, that is, the step is not necessarily performed.
  • Step 35 The UE determines the target reference signal.
  • the UE determines that at least one of the N3 third reference signals indicated in the second signaling is a target reference signal or the UE determines the third signaling. At least one of the indicated N2 second reference signals is a target reference signal.
  • the UE determines the same reference signal among the N3 third reference signals and the N1 first reference signals, and the same reference signal is the target reference signal. Or, after the UE determines the N2 second reference signals, determining the same reference signal in the N1 second reference signals as the N1 first reference signals, where the same reference signal is the target reference signal.
  • step 33 is performed.
  • the UE After the UE determines the target reference signal, the UE determines that the resources associated with the target reference signal are removed from the P resources that are used to carry the link recovery request signal.
  • the target reference signal is the first reference signal 1 and the first reference signal 2
  • the PRACH resources associated with the first reference signal 2 are PRACH resource 1 and PRACH resource 2
  • the PRACH resource associated with the first reference signal 3 is PRACH.
  • Resource 3 the UE determines that the PR resources 1 to PRACH resources 3 are removed from the M resources, and the remaining PRACH resources are P resources that can be used to carry the link recovery request signal.
  • the UE may detect the channel quality of the first reference signal associated with the P resources, from the P resources according to the channel quality. One or more resources are selected to send the link recovery request signal, and when the base station responds to the link recovery request signal, the communication link with the base station is resumed.
  • the embodiment of the present application further includes:
  • Step 36 The base station sends the fourth signaling or the fifth signaling or the sixth signaling.
  • the fourth signaling indicates K1 first reference signals, where the P resources are associated with the K1 first reference signals, and the N1 first reference signals include the K1 The first reference signal, the K1 being an integer greater than or equal to 1 and less than or equal to N1.
  • the signaling type of the first signaling may be RRC
  • the signaling of the fourth signaling may be RRC or MAC-CE or DCI
  • the type of the first signaling may also be MAC-CE
  • the signaling type of the four signaling may be DCI.
  • the signaling type of the fifth signaling and the sixth signaling reference may be made to the fourth signaling, and details are not described herein again.
  • the fourth signaling may directly indicate an index of the K1 first reference signals or other identification information.
  • the fourth signaling indicates that the K1 first reference signals are reference signals that are ultimately used to recover a communication link between the UE and the base station.
  • the base station may also not transmit the fourth signaling.
  • the base station and the UE may also implement the foregoing objectives by using other implementation manners, and are not limited herein.
  • the base station may also determine, according to the signaling, that the resources associated with the K1 first reference signals are P resources used to carry the link recovery request signal. .
  • the base station determines P resources for carrying the link recovery request signal, and it may be understood that the base station activates the K1 first reference signals for restoring the communication link between the UE and the base station, or the base station may release.
  • a first reference signal other than the K1 first reference signals among the N1 first reference signals is associated with a PRACH resource.
  • the base station activates the K1 first reference signals according to the signaling, and is used to restore a communication link between the UE and the base station or release a first reference signal of the N1 first reference signals except the K1 first reference signals.
  • the associated PRACH resource is an optional step, that is, the step is not necessarily performed.
  • the fifth signaling indicates K2 first reference signals, where the P resources and at least one first reference of the N1 first reference signals except the K2 first reference signals
  • the signal is associated with the N1 first reference signals comprising the K2 first reference signals, and K2 is an integer greater than or equal to 1 and less than or equal to N1.
  • the fifth signaling may directly indicate an index of the K2 first reference signals or other identification information.
  • the fifth signaling indicates that the K2 first reference signals are reference signals that are not ultimately used to recover a communication link between the UE and the base station.
  • the base station may also determine, according to the signaling, that the resources associated with the K2 first reference signals are not resources for carrying the link recovery request signal.
  • the base station determines that the resource associated with the K2 first reference signals is not a resource for carrying the link recovery request signal, and may be understood that the base station deactivates the K2 first reference signals, or the base station may release the The K2 first reference signals are associated with PRACH resources.
  • the base station deactivating the K2 first reference signals according to the signaling or releasing the PRACH resources associated with the K2 first reference signals is an optional step, that is, the step is not necessarily performed.
  • the sixth instruction indicates L resources for carrying a link recovery request signal, where the P resources are resources other than the L resources or the P resources among the M resources.
  • the M resources contain L resources.
  • the sixth signaling may directly indicate L indexes or other identification information of resources used to carry the link recovery request signal.
  • the sixth signaling indicates that the L resources are resources that are ultimately used to carry the link recovery request signal or the L resources are resources that are not used to carry the link recovery request signal.
  • the characterized meaning of the L resources indicated by the specific sixth signaling may be agreed between the base station and the UE. For example, the base station and the UE agree that if the L resources are indicated in the signaling, the resource is a resource for carrying the link recovery request signal, and after receiving the signaling, the UE determines that the L resources are P resources. .
  • the base station after the base station indicates L resources to the UE, the base station also determines that the L resources are resources used to carry the link recovery request signal or resources that the L resources are not used to carry the link recovery request signal.
  • the base station determines that the L resources are resources for carrying the link recovery request signal, and it may be understood that the base station activates the first reference signal associated with the L resources. And the base station, the L resources are not used to carry the resources of the link recovery request signal, and the base station may be configured to deactivate the first reference signal associated with the resources other than the L resources among the M resources, or is understood to release the L Resources.
  • the base station activates the first reference signal associated with the L resources according to the signaling or the base station deactivates the first reference signal associated with the resources other than the L resources among the M resources, or releases the L resources, Both are optional steps, ie this step is not mandatory.
  • step 33 is performed.
  • step 33 The execution process of step 33 is the same as that in the first mode, and details are not described herein again.
  • the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, and the sixth signaling are Layer 1 signaling and Layer 2 signaling respectively. At least one of signaling and layer three signaling.
  • the layer-one signaling may be MAC-CE signaling, and the layer 2 signaling may be DCI signaling, and the layer 3 signaling may be RRC signaling.
  • Any one of the first signaling to the sixth signaling may be any one or more of the three signaling modes.
  • the first signaling may be sent multiple times, and the first signaling layer 3 is used.
  • Layer 2 signaling is used for the second time. Of course, it may be split in different signaling in one transmission, and is not limited herein.
  • the first signaling and the second signaling are respectively: optional RRC and RRC and or MAC-CE and or DCI (preferably RRC and MAC-CE or DCI); the optional first signaling is MAC- CE, the second signaling is DCI.
  • the second signaling sent by the base station is configured to enable the UE to determine the resource for carrying the link recovery request signal as soon as possible.
  • the signaling level of the sixth signaling may be higher than the first signaling.
  • the second signaling to the sixth signaling may adopt MAC-CE signaling or DCI signaling; when the first signaling adopts MAC-CE signaling, the second signaling Let the sixth signaling be DCI signaling.
  • the base station uses the method in step 31 to configure three reference signal sets for the UE, namely, set A, set B, and set C, and set A is a set of N3 third reference signals, that is,
  • the set A is a reference signal set that satisfies the QCL hypothesis relationship with the PDCCH
  • the set B is a set of N2 second reference signals, that is, the set B is a reference signal set for detecting a link failure
  • the set C is N1 first references.
  • the set of signals ie set C, is a reference signal set for restoring the communication link between the UE and the base station.
  • the set A is a subset of the resource pool set M
  • the set B is a subset of the resource pool set N
  • the set C is a subset of the resource pool set K.
  • the intersection of any two sets of the resource pool set M, the resource pool set N, and the resource pool set K is an empty set. Then, the target reference signal is an empty set, and the base station may not release the reference in the set C. Signal associated PRACH resources.
  • the intersection of the resource pool set M and the resource pool set N is an empty set, and the intersection of the resource pool set M and the resource pool set K is not an empty set, and when the base station activates the set A by signaling, the target reference signal For the partial reference signal of the set A in the set C or the partial reference signal of the set A in the resource pool set K, the base station may deactivate the partial reference signal of the set A in the set C or the base station may deactivate the part of the set A in the resource pool set K.
  • the reference signal, the target reference signal is thereby releasing the PRACH resource corresponding to the partial reference signal.
  • the intersection of the resource pool set M and the resource pool set N is an empty set, and the intersection of the resource pool set N and the resource pool set K is not an empty set, and when the base station activates the set B by signaling, the target reference signal For the partial reference signal of the set B in the set C or the partial reference signal of the set B in the resource pool set K, the base station may deactivate the partial reference signal of the set B in the set C or the base station may deactivate the part of the set B in the resource pool set K.
  • the reference signal releases the PRACH resource corresponding to the partial reference signal.
  • the intersection of the resource pool set M and the resource pool set N is not an empty set, and the intersection of the resource pool set N and the resource pool set K is an empty set. Then, the target reference signal is an empty set, and the base station may not release.
  • the intersection of the resource pool set M and the resource pool set N is not an empty set, and the intersection of the resource pool set N and the resource pool set K is not an empty set, and when the base station activates the set B by signaling, the target reference The signal is a partial reference signal of the set B in the set C or a partial reference signal of the set B in the resource pool set K, the base station may deactivate the partial reference signal of the set B in the set C or the base station may deactivate the set B in the resource pool set K Part of the reference signal, thereby releasing the PRACH resource corresponding to the partial reference signal.
  • the resource pool set N is the same as the resource pool set K.
  • the intersection of the resource pool set M and the resource pool set N is an empty set, and the sum of the set B and the set C is not the set N, and then the base station passes the signaling.
  • the target reference signal is a partial reference signal of the set B in the set C or a partial reference signal of the set B in the resource pool set K, and the base station may deactivate the partial reference signal or the base station of the set B in the set C.
  • the partial reference signal of the set B in the resource pool set K may be deactivated, thereby releasing the PRACH resource corresponding to the partial reference signal.
  • the resource pool set N is the same as the resource pool set K, the intersection of the resource pool set M and the resource pool set N is an empty set, the sum of the set B and the set C is the set N, and the set B and the set C have no intersection. Then, when the base station activates the set B by using the signaling, the target reference signal is an empty set, and the base station can directly activate the remaining reference signal in the resource pool set N as a candidate reference signal, and no PRACH resource is released at this time.
  • the resource pool set N is the same as the resource pool set K.
  • the intersection of the resource pool set M and the resource pool set N is an empty set, the sum of the set B and the set C is a set N, and the set B and the set C have an intersection.
  • the target reference signal is a partial reference signal of the set B in the set C or a partial reference signal of the set B in the resource pool set K, and the base station can deactivate the partial reference of the set B in the set C.
  • the signal or the base station may deactivate a partial reference signal of the set B in the resource pool set K, thereby releasing the PRACH resource corresponding to the partial reference signal.
  • the resource pool set N is the same as the resource pool set K.
  • the intersection of the resource pool set M and the resource pool set N is not an empty set, and the sum of the set B and the set C is not the set N, and then the base station passes the signaling.
  • the target reference signal is a partial reference signal of the set A or the set B in the set C, or the target reference signal is a partial reference signal of the set A or the set B of the resource pool set K, and the base station may deactivate the set.
  • a or a set of reference signals of the set B in the set C, or the base station may deactivate the partial reference signal of the set A or set B in the resource pool set K, thereby releasing the PRACH resource corresponding to the partial reference signal.
  • the resource pool set N is the same as the resource pool set K.
  • the intersection of the resource pool set M and the resource pool set N is not an empty set, and the sum of the set B and the set C is a set N, when the base station is activated by signaling.
  • the base station may directly activate the remaining reference signals except the set B in the resource pool set N as the candidate reference signal.
  • the target reference signal is the partial reference signal of the set A or the set B in the set C, or
  • the target reference signal is a partial reference signal of the set A or the set B in the resource pool set K
  • the base station may also deactivate the partial reference signal of the set A or the set B in the set C, or the base station may deactivate the set A or the set B in the resource pool.
  • the partial reference signal of the set K is released, thereby releasing the PRACH resource corresponding to the partial reference signal.
  • the resource pool set N and the resource pool set M are the same as the resource pool set K.
  • the target reference signal is a partial reference signal of the set A in the set C, or
  • the target reference signal is a partial reference signal of the set A in the resource pool set K, and the base station may deactivate the partial reference signal of the set A in the set C or the resource pool set K, thereby releasing the PRACH resource corresponding to the partial reference signal, as shown in the figure.
  • the target reference signal is a partial reference signal of the set B in the set C, or the target reference signal is a partial reference signal of the set B in the resource pool set K, and the base station can deactivate the set B.
  • Corresponding PRACH resource as shown in FIG. 18C.
  • the multiple reference signals and resources are also used.
  • Performing further screening for example, screening the plurality of reference signals for link failure detection and/or a partial reference signal that satisfies a QCL hypothesis relationship with the PDCCH and resources associated with the partial reference signal, so that the network device and the terminal device may Only a part of the plurality of reference signals and corresponding resources are used to recover the communication link, and for the filtered reference signal, naturally, no resources are needed, for example, the resources corresponding to the filtered reference signal can be released. Therefore, the overhead of the uplink resource can be saved without affecting the success rate of the communication link recovery.
  • the link recovery method provided by the embodiment of the present application is introduced from the perspective of the interaction between the network elements and the network elements.
  • each network element such as a UE, a base station, etc.
  • each network element includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • FIG. 19 shows a possible schematic diagram of a network device 1900.
  • the network device 1900 can implement the functions of the base station involved in the above embodiments.
  • the network device 1900 includes a transmitting module 1901 and a processing module 1902.
  • the sending module 1901 is configured to send the first signaling to the terminal device.
  • the first signaling is used to configure M resources for carrying a link recovery request signal, where the link recovery request signal is used for a communication link failure between the terminal device and the network device. Recovering the communication link or reconfiguring a signal of a new link, the M resources being associated with N1 first reference signals, the first reference signal being used to identify a new link;
  • the processing module 1902 is configured to detect the link recovery request signal from P resources used to carry the link recovery request signal;
  • the M resources include the P resources, and the P resources are resources determined by the network device according to the N1 first reference signals and N2 second reference signals, and/or the P resources.
  • the resource is a resource that is determined by the network device according to the N1 first reference signal and the N3 third reference signals, where the second reference signal is used to detect a link failure, and the third reference signal is related to a physical downlink control channel PDCCH. Satisfying the quasi-co-located QCL hypothesis relationship, M, N1, N2, N3, P are integers greater than or equal to 1.
  • the P resources are associated with a reference signal other than the target reference signal of the N1 first reference signals, where the target reference signal is the N2 second reference signals. At least one reference signal and/or at least one of the N3 third reference signals.
  • the sending module 1901 is also used to:
  • the second signaling is used to indicate that the terminal device detects a link failure by using the target reference signal in the N1 first reference signals;
  • the second signaling is used to indicate that the terminal device detects the link failure by using the N3 third reference signals; or
  • the second signaling is used to indicate QCL information of the N2 second reference signals.
  • the second signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the second signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the sending module 1901 is also used to:
  • the third signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the third signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the sending module 1901 is also used to:
  • the fourth signaling indicates K1 first reference signals, where the P resources are associated with the K1 first reference signals, and the N1 first
  • the reference signal includes the K1 first reference signals, and the K1 is an integer greater than or equal to 1 and less than or equal to N1.
  • the sending module 1901 is also used to:
  • the fifth signaling indicates K2 first reference signals, where the P resources and the N1 first reference signals are divided by the K2 first references Associated with at least one first reference signal outside the signal, the N1 first reference signals comprising the K2 first reference signals, the K2 being an integer greater than or equal to 1 and less than or equal to N1.
  • the sending module 1901 is also used to:
  • the outer resource or the P resources are the L resources.
  • the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, and the sixth signaling are respectively At least one of layer-one signaling, layer two signaling, and layer three signaling.
  • FIG. 20 shows a possible structural diagram of the terminal device 2000.
  • the terminal device 2000 can implement the functions of the UE involved in the foregoing embodiments.
  • the terminal device 2000 includes a receiving module 2001 and a processing module 2002.
  • the receiving module 2001 is configured to receive the first signaling sent by the network device.
  • the first signaling is used to configure M resources for carrying a link recovery request signal, where the link recovery request signal is used for a communication link failure between the terminal device and the network device. Recovering the communication link or reconfiguring a signal of a new link, the M resources being associated with N1 first reference signals, the first reference signal being used to identify a new link;
  • the processing module 2002 is configured to select at least one resource from the P resources for carrying the link recovery request signal, for carrying and transmitting the link recovery request signal;
  • the M resources include the P resources, and the P resources are resources determined by the terminal device according to the N1 first reference signals and N2 second reference signals, and/or the P resources.
  • the resource is a resource that is determined by the terminal device according to the N1 first reference signal and the N3 third reference signals, where the second reference signal is used to detect a link failure, and the third reference signal is related to a physical downlink control channel PDCCH. Satisfying the quasi-co-located QCL hypothesis relationship, M, N1, N2, N3, P are integers greater than or equal to 1.
  • the P resources are associated with a reference signal other than the target reference signal of the N1 first reference signals, where the target reference signal is the N2 second reference signals. At least one reference signal and/or at least one of the N3 third reference signals.
  • the receiving module 2001 is further configured to:
  • the second signaling is used to indicate that the terminal device detects a link failure by using the target reference signal in the N1 first reference signals;
  • the second signaling is used to indicate that the terminal device detects the link failure by using the N3 third reference signals; or
  • the second signaling is used to indicate QCL information of the N2 second reference signals.
  • the second signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the second signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the receiving module 2001 is further configured to:
  • the third signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the third signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the receiving module 2001 is further configured to:
  • the receiving module 2001 is further configured to:
  • the fifth signaling indicates K2 first reference signals
  • the P resources and the N1 first reference signals are the first except the K2 Associated with at least one first reference signal outside the reference signal
  • the N1 first reference signals comprising the K2 first reference signals
  • the K2 being an integer greater than or equal to 1 and less than or equal to N1
  • the receiving module 2001 is further configured to:
  • the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, and the sixth signaling are respectively At least one of layer-one signaling, layer two signaling, and layer three signaling.
  • the network device 1900 and the terminal device 2000 are presented in the form of dividing each functional module into functions, or may be presented in an integrated manner to divide the functional modules.
  • a “module” herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality. .
  • ASIC application-specific integrated circuit
  • the network device 1900 can also be implemented by the structure shown in FIG. 21, and the terminal device 2000 can be implemented by the structure shown in FIG. The structure shown in Figs. 21 and 22 will be described below.
  • the network device 2100 may include a transmitter 2101, a processor 2102, and a receiver 2103.
  • the physical device corresponding to the sending module 1901 in FIG. 19 may be the transmitter 2101
  • the physical device corresponding to the processing module 1902 may be the processor 2102.
  • the processor 2102 may be a central processing unit (CPU) or an application specific integrated circuit (ASIC), and may be one or more integrated circuits for controlling program execution, may be a baseband chip, and the like.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the device may further include a memory, which may be connected to the processor 2102 through a bus structure or a star structure or other structure, or may also be respectively connected to the processor 2102 through a dedicated connection line, in which the bus structure is example.
  • the number of memories may be one or more, and the memory may be a read only memory (ROM), a random access memory (RAM), or a disk memory, and the like.
  • the transmitter 2101 is configured to send the first signaling to the terminal device under the control of the processor 2102.
  • the first signaling is used to configure M resources for carrying a link recovery request signal, where the link recovery request signal is used for a communication link failure between the terminal device and the network device. Recovering the communication link or reconfiguring a signal of a new link, the M resources being associated with N1 first reference signals, the first reference signal being used to identify a new link;
  • a receiver 2103 configured to detect, by the processor 2102, the link recovery request signal from P resources for carrying a link recovery request signal;
  • the M resources include the P resources, and the P resources are resources determined by the network device according to the N1 first reference signals and N2 second reference signals, and/or the P resources.
  • the resource is a resource that is determined by the network device according to the N1 first reference signal and the N3 third reference signals, where the second reference signal is used to detect a link failure, and the third reference signal is related to a physical downlink control channel PDCCH. Satisfying the quasi-co-located QCL hypothesis relationship, M, N1, N2, N3, P are integers greater than or equal to 1.
  • the P resources are associated with a reference signal other than the target reference signal of the N1 first reference signals, where the target reference signal is the N2 second reference signals. At least one reference signal and/or at least one of the N3 third reference signals.
  • the transmitter 2101 is also used to:
  • the second signaling is used to indicate that the terminal device detects a link failure by using the target reference signal in the N1 first reference signals;
  • the second signaling is used to indicate that the terminal device detects the link failure by using the N3 third reference signals; or
  • the second signaling is used to indicate QCL information of the N2 second reference signals.
  • the second signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the second signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the transmitter 2101 is also used to:
  • the third signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the third signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the transmitter 2101 is also used to:
  • the fourth signaling indicates K1 first reference signals, where the P resources are associated with the K1 first reference signals, and the N1 first
  • the reference signal includes the K1 first reference signals, and the K1 is an integer greater than or equal to 1 and less than or equal to N1.
  • the transmitter 2101 is also used to:
  • the fifth signaling indicates K2 first reference signals, where the P resources and the N1 first reference signals are divided by the K2 first references Associated with at least one first reference signal outside the signal, the N1 first reference signals comprising the K2 first reference signals, the K2 being an integer greater than or equal to 1 and less than or equal to N1.
  • the transmitter 2101 is also used to:
  • the outer resource or the P resources are the L resources.
  • the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, and the sixth signaling are respectively At least one of layer-one signaling, layer two signaling, and layer three signaling.
  • the terminal device 2200 may include a receiver 2201, a processor 2202, and a transmitter 2203.
  • the physical device corresponding to the receiving module 2001 in FIG. 20 may be the receiver 2201
  • the physical device corresponding to the processing module 2002 may be the processor 2202.
  • the processor 2202 may be a central processing unit (CPU) or an application specific integrated circuit (ASIC), and may be one or more integrated circuits for controlling program execution, may be a baseband chip, and the like.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the device may further include a memory, which may be connected to the processor 2202 through a bus structure or a star structure or other structure, or may also be respectively connected to the processor 2202 through a dedicated connection line, in which the bus structure is example.
  • the number of memories may be one or more, and the memory may be a read only memory (ROM), a random access memory (RAM), or a disk memory, and the like.
  • the receiver 2201 is configured to receive, by the processor 2202, the first signaling sent by the network device;
  • the first signaling is used to configure M resources for carrying a link recovery request signal, where the link recovery request signal is used for a communication link failure between the terminal device and the network device. Recovering the communication link or reconfiguring a signal of a new link, the M resources being associated with N1 first reference signals, the first reference signal being used to identify a new link;
  • the transmitter 2203 is configured to select, by the processor 2202, at least one resource from the P resources for carrying the link recovery request signal, to carry and send the link recovery request signal;
  • the M resources include the P resources, and the P resources are resources determined by the terminal device according to the N1 first reference signals and N2 second reference signals, and/or the P resources.
  • the resource is a resource that is determined by the terminal device according to the N1 first reference signal and the N3 third reference signals, where the second reference signal is used to detect a link failure, and the third reference signal is related to a physical downlink control channel PDCCH. Satisfying the quasi-co-located QCL hypothesis relationship, M, N1, N2, N3, P are integers greater than or equal to 1.
  • the P resources are associated with a reference signal other than the target reference signal of the N1 first reference signals, where the target reference signal is the N2 second reference signals. At least one reference signal and/or at least one of the N3 third reference signals.
  • the receiver 2201 is also used to:
  • the second signaling is used to indicate that the terminal device detects a link failure by using the target reference signal in the N1 first reference signals;
  • the second signaling is used to indicate that the terminal device detects the link failure by using the N3 third reference signals; or
  • the second signaling is used to indicate QCL information of the N2 second reference signals.
  • the second signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the second signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the receiver 2201 is also used to:
  • the third signaling is used to indicate that the terminal device prohibits using the target reference signal to identify a new link
  • the third signaling is used to instruct the terminal device to identify a new link by using a reference signal other than the target reference signal in the N1 first reference signals.
  • the receiver 2201 is also used to:
  • the receiver 2201 is also used to:
  • the fifth signaling indicates K2 first reference signals
  • the P resources and the N1 first reference signals are the first except the K2 Associated with at least one first reference signal outside the reference signal
  • the N1 first reference signals comprising the K2 first reference signals
  • the K2 being an integer greater than or equal to 1 and less than or equal to N1
  • the receiver 2201 is also used to:
  • the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, and the sixth signaling are respectively At least one of layer-one signaling, layer two signaling, and layer three signaling.
  • the network device 2100 and the terminal device 2200 may be a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), and a system on chip.
  • FPGA field-programmable gate array
  • ASIC application specific integrated circuit
  • SoC central processor unit
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processor
  • MCU microcontroller
  • PLD programmable logic device
  • the network device and the terminal device provided by the present application may be a chip system, and the chip system may include at least one chip, and may also include other discrete devices.
  • the chip system can be placed in a network device or a terminal device, and the network device or the terminal device is supported to complete the link recovery method provided in the embodiment of the present application.
  • the embodiment of the present application provides a computer storage medium, where the computer storage medium stores an instruction, and when the instruction is run on a computer, causes the computer to execute the foregoing link recovery method.
  • the embodiment of the present application provides a computer program product, the computer program product comprising instructions, when the instruction is run on a computer, causing the computer to perform the foregoing link recovery method.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another readable storage medium, for example, the computer instructions can be passed from a website site, computer, server or data center Wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium eg, a solid state disk (SSD)

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Abstract

一种链路恢复方法、终端设备及网络设备，所述方法包括：终端设备接收网络设备发送的第一信令；所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于恢复通信链路或重配新链路的信号，所述第一参考信号用于识别新链路；所述终端设备从P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送所述链路恢复请求信号；所述P个资源是所述终端设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述终端设备根据所述N1个第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系。

Description

一种链路恢复方法、终端设备及网络设备
本申请要求于2017年11月27日提交中国专利局、申请号为201711209646.0、申请名称为“一种链路恢复方法、终端设备及网络设备”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
本申请涉及通信技术领域，尤其涉及一种链路恢复方法、终端设备及网络设备。
背景技术
随着业务需求量的不断增加，无线通信系统的频谱资源日益稀缺，具有更大的可用带宽的高频频段，成为下一代无线通信系统的候选频段。
在高频频段的信道中，通常使用波束作为信号承载。而波束在高频信道下的绕射能力差，当波束被阻挡时，通信会中段，此时需要快速恢复通信链路。
为了快速恢复通信链路，基站需要给终端设备配置候选参考信号集合(candidate beam identification reference signal set)，用于恢复终端设备与网络设备的通信链路。其中，基站为候选参考信号集合中的每一个参考信号配置非竞争的随机接入信道(random access channel，RACH)资源，当发生链路失败时，终端设备则使用与该候选参考信号集合关联的RACH资源传输波束失败恢复请求/链路失败恢复请求(beam failure recovery request)，当基站接收该波束失败恢复请求/链路失败恢复请求后，则恢复通信链路。
为了确保恢复通信链路的成功率，通常候选参考信号集合会包含多个参考信号。由于基站会为每个参考信号配置RACH资源，则候选参考信号集合中的参考信号越多，则需要更多的RACH资源，从而造成上行资源开销较大的问题。
发明内容
本申请实施例提供一种链路恢复方法，用以解决现有技术中存在的上行资源开销较大的技术问题。
第一方面，本申请实施例提供一种链路恢复方法，在该方法中，网络设备首先为终端设备配置M个用于承载链路恢复请求信号的资源及N1个第一参考信号，该链路恢复请求信号用于在该终端设备与该网络设备之间的通信链路失败时恢复该通信链路或重配新链路的信号，该M个资源与该N1个第一参考信号相关联，该第一参考信号用于识别新链路，然后通过第一信令，将该M个资源的配置信息指示给该终端设备，然后该终端设备根据该N1个第一参考信号与N2个第二参考信号，和/或根据该N1第一参考信号与N3个第三参考信号，从M个资源中确定出P个资源用于承载链路恢复请求信号，并从该P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送该链路恢复请求信号，其中，所述M个资源包含所述P个资源，该第二参考信号用于检测链路失败，该第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
在上述技术方案中，当网络设备为终端设备配置用于恢复该终端设备与该网络设备之间的通信链路的多个参考信号以及对应的资源后，还会对该多个参考信号及资源进行进一步筛选，例如，筛除该多个参考信号用于链路失败检测和/或与PDCCH满足QCL假设关系的部分参考信号以及与该部分参考信号相关联的资源，从而网络设备和终端设备可以只使用该多个参考信号以及对应的资源中的一部分来恢复该通信链路，而对于筛除的参考信号，自然也无需再占用用于承载链路恢复请求信号的资源，例如可以将筛除的参考信号对应的用于承载链路恢复请求信号的资源释放掉，从而可以在不影响通信链路恢复的成功率的前提下，节约上行资源的开销。
在一种可能的实现方式中，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述N3个第三参考信号中的至少一个参考信号。或所述P个资源是所述M个资源中与N1个第一参考信号中的目标参考信号不关联的的资源中的至少一个资源，或所述P个资源是所述M个资源中与N1个第一参考信号中除目标参考信号外的参考信号相关联的的资源中的至少一个资源。
在上述方案中，首先从N1个第一参考信号中筛除目标参考信号，然后与N1个第一参考信号中剩余的参考信号关联的资源为该P个资源。
在一种可能的实现方式中，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述网络设备向所述终端设备发送的第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号，所述终端设备接收所述第二信令。
在上述技术方案中，网络设备将与PDCCH满足QCL假设关系的第三参考信号指示给终端设备，从而终端设备则根据第三参考信号确定出目标参考信号。
在一种可能的实现方式中，网络设备除了可以通过第二信令指示第三参考信号，还可以通过指示其他内容，例如：
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
所述第二信令用于指示N2个第二参考信号的QCL信息。
在一种可能的实现方式中，所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的实现方式中，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述网络设备向所述终端设备发送的第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号，所述终端设备接收所述第三信令。
在上述技术方案中，网络设备将用于检测链路失败的第二参考信号指示给终端设备，从而终端设备则根据第二参考信号确定出目标参考信号。
在一种可能的实现方式中，网络设备除了可以通过第三信令指示第二参考信号， 还可以通过指示其他内容，例如：
所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
终端设备还可以使用其他方式确定出P个资源，例如：
在一种可能的实现方式中，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述网络设备向所述终端设备发送的第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数，所述终端设备接收所述第四信令。
在一种可能的实现方式中，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述网络设备向所述终端设备发送的第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数，所述终端设备接收所述第五信令。
在一种可能的实现方式中，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述网络设备向所述终端设备发送的第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源，所述终端设备接收所述第六信令。
在上述技术方案中，终端设备可以直接根据网络设备发送的信令，直接确定出P个资源，从而减少终端设备的运算量，可以减少链路恢复所需的时长。
在一种可能的实现方式中，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
在上述技术方案中，各个信令的信令类型可以为层一信令、层二信令以及层三信令中的至少一个种，网络设备可以灵活配置。
第二方面，本申请实施例提供一种链路恢复方法，在该方法中，网络设备首先为终端设备配置M个用于承载链路恢复请求信号的资源及N1个第一参考信号，该链路恢复请求信号用于在该终端设备与该网络设备之间的通信链路失败时恢复该通信链路或重配新链路的信号，该M个资源与该N1个第一参考信号相关联，该第一参考信号用于识别新链路，然后通过第一信令，将该M个资源的配置信息指示给该终端设备，然后该终端设备根据该N1个第一参考信号与N2个第二参考信号，和/或根据该N1第一参考信号与N3个第三参考信号，从M个资源中确定出S个不用于承载链路恢复请求信号的资源，并使用M个资源中的除与目标参考信号关联的S个用于承载链路恢复请求信号的资源外的至少一个资源承载并发送该链路恢复请求信号，其中，该第二参考信号用于检测链路失败，该第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。且网络设备也能够根据该N1个第一参考信号与N2个第二参考信号，和/或根据该N1第一参考信号与N3个第 三参考信号确定并释放出所述S个资源。
在上述技术方案中，当网络设备为终端设备配置用于恢复该终端设备与该网络设备之间的通信链路的多个参考信号以及对应的资源后，还会对该多个参考信号及资源进行进一步筛选，例如，释放该多个参考信号用于链路失败检测和/或与PDCCH满足QCL假设关系的部分参考信号以及与该部分参考信号相关联的资源，从而网络设备和终端设备可以只使用该多个参考信号以及对应的资源中的一部分来恢复该通信链路，从而可以在不影响通信链路恢复的成功率的前提下，节约上行资源的开销。
在一种可能的实现方式中，所述网络设备向所述终端设备发送第二信令，所述第二信令指示所述N3个第三参考信号，所述网络设备释放与所述至少一个参考信号关联的用于承载链路恢复请求信号的资源，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。所述终端设备接收所述第二信令后，根据该第二信令确定所述目标参考信号。
在上述技术方案中，网络设备将与PDCCH满足QCL假设关系的第三参考信号指示给终端设备，从而网络设备可以根据第三参考信号释放与目标参考信号关联的资源，终端设备则根据第三参考信号确定出目标参考信号。
在一种可能的实现方式中，网络设备除了可以通过第二信令指示第三参考信号，还可以通过指示其他内容，例如：
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
所述第二信令用于指示所述终端设备使用所述N3个第三参考信号中的至少一个参考信号检测链路失败；或
所述第二信令用于指示所述N2个第二参考信号的QCL信息。
在一种可能的实现方式中，所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的实现方式中，所述网络设备向所述终端设备发送第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号；所述网络设备释放与所述至少一个参考信号关联的用于承载链路恢复请求信号的资源。所述终端设备接收所述第三信令后，根据该第三信令确定所述目标参考信号。
在上述技术方案中，网络设备将用于检测链路失败的第二参考信号指示给终端设备，从而网络设备可以根据第二参考信号释放与目标参考信号关联的资源，终端设备则根据第二参考信号确定出目标参考信号。
在一种可能的实现方式中，网络设备除了可以通过第三信令指示第二参考信号，还可以通过指示其他内容，例如：所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或者，
所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
终端设备及网络设备还可以使用其他方式确定出S个资源，例如：
在一种可能的实现方式中，所述网络设备向所述终端设备发送第四信令，所述第四信令指示K1个第一参考信号，其中，所述N1个第一参考信号中除K1个第一参考信号外的参考信号为所述目标参考信号，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数；所述网络设备释放与所述N1个第一参考信号中除K1个第一参考信号外的第一参考信号关联的用于承载链路恢复请求信号的资源。所述终端设备接收所述第四信令后，根据该第四信令确定所述目标参考信号。
在一种可能的实现方式中，所述网络设备向所述终端设备发送第五信令，所述第五信令指示K2个第一参考信号，其中，所述K2个第一参考信号为所述目标参考信号，所述N1个第一参考信号包含所述K2个第一参考信号；所述网络设备释放与所述K2个第一参考信号关联的用于承载链路恢复请求信号的资源。所述终端设备接收所述第五信令后，根据该第五信令确定所述目标参考信号。
在一种可能的实现方式中，所述网络设备向所述终端设备发送第六信令，所述第六信令指示L个用于承载链路恢复请求信号的资源，其中，所述S个资源为所述M个资源中除所述L个资源外的资源或所述S个资源为所述L个资源；所述网络设备释放所述M个资源中除所述L个资源外的资源或释放所述L个资源。所述终端设备接收所述第六信令后，根据该第六信令确定所述目标参考信号。
在上述技术方案中，终端设备可以直接根据网络设备发送的信令，直接确定出P个资源，从而减少终端设备的运算量，可以减少链路恢复所需的时长。
在一种可能的实现方式中，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
在上述技术方案中，各个信令的信令类型可以为层一信令、层二信令以及层三信令中的至少一个种，网络设备可以灵活配置。
第三方面，本申请实施例提供一种参考信号确定方法，该方法包括：所述终端设备接收所述网络设备发送的第二信令，其中，所述第二信令指示N3个第三参考信号，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系；所述终端设备确定所述N3个第三参考信号中的至少一个参考信号为被禁止用于恢复所述终端设备与所述网络设备之间的通信链路的参考信号或者所述终端设备确定所述N3个第三参考信号中的至少一个参考信号为用于检测链路失败的参考信号。
可选的，在上述技术方案中，终端设备可以根据网络设备指示的物理下行控制信道PDCCH QCL信息隐式指示N3个第三参考信号，从而节省信令开销。
在一种可能的实现方式中，该第二信令除了可以指示第三参考信号，还可以隐式地指示其他内容，例如：
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述至少一个参考信号检测链路失败，所述第一参考信号用于识别新链路；或
所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
所述第二信令用于指示N2个第二参考信号的QCL信息。
由于该第二信令可以同时指示多种信息，从而可以节省信令以及资源开销。
在一种可能的实现方式中，所述第二信令用于指示所述终端设备禁止使用所述至少一个参考信号识别新链路；或
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述至少一个参考信号外的参考信号识别新链路。
第四方面，本申请实施例提供一种参考信号确定方法，该方法包括：所述终端设备接收所述网络设备发送的第三信令，其中，所述第三信令指示N2个第二参考信号，所述第二参考信号用于检测链路失败；所述终端设备确定所述N2个第二参考信号中的至少一个参考信号为被禁止用于恢复所述终端设备与所述网络设备之间的通信链路的参考信号。
在上述技术方案中，终端设备可以根据网络设备指示的用于检测链路失败的参考信号，确定无法用于恢复所述终端设备与所述网络设备之间的通信链路的参考信号，处理方法简单，可以减少终端设备的运算量。
在一种可能的实现方式中，该第三信令除了可以指示第二参考信号，还可以隐式地指示其他内容，例如：
所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
第五方面，本申请实施例提供了一种终端设备，该终端设备具有实现上述第一方面以及第二方面方法中终端设备行为的功能。所述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模块。
在一个可能的设计中，终端设备的结构中包括处理器和收发器，所述处理器被配置为支持终端设备执行上述第一方面以及第二方面方法中相应的功能。所述收发器用于支持终端设备和其他设备之间的通信，向其他设备发送或接收上述第一方面方法中所涉及的信息或者指令。所述终端设备还可以包括存储器，所述存储器用于与处理器耦合，其保存必要的程序指令和数据。
第六方面，本申请实施例提供了一种网络设备，该网络设备具有实现上述第一方面以及第二方面方法中网络设备行为的功能。所述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模块。
在一个可能的设计中，网络设备的结构中包括处理器和收发器，所述处理器被配置为支持网络设备执行上述第一方面以及第二方面方法中相应的功能。所述收发器用于支持网络设备和其他设备之间的通信，向其他设备发送或接收上述第一方面方法中所涉及的信息或者指令。所述网络设备还可以包括存储器，所述存储器用于与处理器耦合，其保存必要的程序指令和数据。
第七方面，本申请实施例提供了一种计算机存储介质，用于存储用于执行上述第一方面、第一方面的任意一种设计以及上述第二方面的功能所用的计算机软件指令，并包含用于执行上述第一方面、第一方面的任意一种设计以及上述第二方面的方法所设计的程序。
第八方面，本申请实施例提供了一种计算机程序产品，该计算机程序产品包含有 指令，当该指令在计算机上运行时，使得所述计算机执行执行上述第一方面、第一方面的任意一种设计以及上述第二方面的方法。
第九方面，本申请实施例还提供了一种芯片系统，该芯片系统包括处理器，用于支持终端设备实现上述第一方面以及第二方面所述的方法或用于支持网络设备实现上述第一方面以及第二方面的方法，例如，生成或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，该芯片系统还包括存储器，该存储器，用于保存移动边缘计算设备或网络设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其它分立器件。
附图说明
图1为本申请实施例的一种应用场景的示意图；
图2为现有技术中信道质量的测量过程的示意图；
图3A-图3B为申请实施例提供一种链路恢复方法的流程图；
图4-图7为本申请实施例中目标参考信号的四种情况的示意图；
图8-图17为本申请实施例中的目标参考信号的示例的示意图；
图18A、18B、18C为本申请实施例中的目标参考信号的另一种示例的示意图；
图19为本申请实施例中网络设备的一种可能的结构示意图；
图20为本申请实施例中终端设备的一种可能的结构示意图；
图21为本申请实施例中网络设备的另一种可能的结构示意图；
图22为本申请实施例中终端设备的另一种可能的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施例作进一步地详细描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：新无线(New Radio，NR)系统、无线保真(wifi)、全球微波互联接入(Worldwide Interoperability for Microwave Access，WiMAX)、全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、以及第三代合作伙伴计划(The 3rd Generation Partnership Project，3GPP)相关的蜂窝系统等，以及第五代移动通信系统(The Fifth Generation，5G)等。
以下，对本申请中的部分用于进行解释说明，以方便本领域技术人员理解。
(1)网络设备，例如包括基站(例如，接入点)，可以是指接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备。网络设备可用于将收到的空中帧与IP分组进行相互转换，作为终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括IP网络。网络设备还可协调对空中接口的属性管理。例如，基站可以包括长期演进(Long Term Evolution，LTE)系统或演进的LTE系统(LTE-Advanced，LTE-A)中的演 进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括5G系统中的下一代节点B(next generation node B，gNB)，本申请实施例并不限定。
(2)终端设备，包括向用户提供语音和/或数据连通性的设备，例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(Radio Access Network，RAN)与核心网进行通信，与RAN交换语音和/或数据。该终端设备可以包括用户设备(User Equipment，UE)、无线终端设备、移动终端设备、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point，AP)、远程终端设备(Remote Terminal)、接入终端设备(Access Terminal)、用户终端设备(User Terminal)、用户代理(User Agent)、或用户装备(User Device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，智能穿戴式设备等。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)、智能手表、智能头盔、智能眼镜、智能手环、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(RFID)、传感器、全球定位系统(GPS)、激光扫描器等信息传感设备。
(3)波束(beam)，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。
本申请实施例中，也可以将“波束”称为“参考信号”或者“赋形波束”等。也就是说，本文对于“波束”的名称不作限制，只要表达的是如上的概念即可。
(4)波束对(beam pair link，BPL)，波束对的概念建立在波束的概念上。一个波束对通常包括一个发送端的发送波束和一个接收端的接收波束。例如一个波束对可以包括基站的发送波束和UE的接收波束。
(5)准共址(Quasi-Co-Location，QCL)假设关系，可以用来辅助描述终端设备的接收侧波束赋形信息及接收流程，该QCL可以包括一些空间特性参数，如出发角相关参数，例如，水平向出发角(Azimuth angle of Departure，AoD)，垂直向出发角(Zenith angle of Departure，ZoD)，水平向角度扩展(Azimuth angle spread of Departure，ASD)，垂直向角度扩展(Zenith angle spread of Departure，ZSD)；或到达角相关参数，例如，水平向到达角(Azimuth angle of Arrival，AoA)，垂直向出发角(Zenith angle of Arrival，ZoA)，水平向角度扩展(Azimuth angle spread of Arrival，ASA)，垂直向角度扩展(Zenith angle spread of Arrival，ZSA)，空间接收参数(Spatial Rx parameter)，延迟扩展、多普勒扩展、多普勒频移、平均增益和平均延迟等。这些空间特性参数描述了参考信号天线端口间的空间信道 特性。从而可完成终端设备接收侧波束赋形或接收处理过程的辅助。当然，该QCL包括的空间特性参数也可以为除上述参数外的其他参数，在此不作限制。
(6)随机接入信道(random access channel，RACH)资源，例如可以是物理随机接入信道(physical random access channel，PRACH)资源或者是物理上行控制信道(physical uplink control channel，PUCCH)，当然，也可以是其他信道资源。该资源由时频码组成，在终端设备选择一组确定的随机接入资源时，终端设备发起随机接入的时间、频点及前导码也就是确定的。
(7)波束状态信息(beam state information，BSI)，也称为波束测量信息，也可以是其他名称，主要包括波束索引，波束的参考信号接收功率(reference signal received power，RSRP)、参考信号接收质量(reference signal receiving quality，RSRQ)、信号与干扰加噪声比(signal to interference plus noise ratio，SINR)、信噪比(signal-to-noise ratio，SNR)、信道质量指示(Channel Quality Indicator，CQI)、假设PDCCH块差错比(hypothetical PDCCH block error rate，hypothetical PDCCH BLER)中的至少一个，当然，也可以包含其他参数，在此不作限制。
(8)通信链路失败：也可以称为通信链路故障、通信链路失败、波束故障、波束失败、链路故障、链路失败、通信故障、通信失败等中的任意一种名称。通信链路失败可以例如但不限于包括以下几种情况之一：①网络设备发送PDCCH信息的波束和终端接收PDCCH信息的波束质量下降到足够低时发生通信失败，即用于传输PDCCH的波束对的质量下降到足够低时发生通信链路失败。质量下降到足够低可以例如但不限于体现为：终端接收的信号质量小于一个门限，或者终端在预定时间窗内无法接收到信号。②网络设备为终端配置与控制信道满足准共址QCL关系的参考信号资源，该参考信号资源的信道质量低于一个门限时，认为通信失败。通常该门限(例如上述①②中的门限)小于或等于恢复终端和网络设备之间的通信时设置的信道质量的门限值。
(9)链路恢复请求信号：用于在终端设备与网络设备之间的通信链路失败时，或者在通信链路失败之后，恢复该通信链路或重配新链路的信号，也可以称为波束恢复请求信号、波束失败恢复请求信号、链路失败恢复请求信号、链路重配信号、链路失败重配信号、链路重配请求信号、链路失败重配请求信号中的任意一个，当然，也可以有其他名称，在此不作限制。
另外，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
接下来介绍本申请实施例的应用场景作简要介绍。
请参考图1，为本申请实施例的一种应用场景。在图1中包括基站和位于该基站的覆盖范围内的终端设备，基站与终端设备之间通过多个波束对进行数据传输，例如，基站通过下行发送波束1向终端设备发送下行数据，终端设备通过上行接收波束2接收基站发送的下行数据。
由于高频频段会导致较大的无线传播的损耗，而波束赋形技术可以将传输信号的能量限制在某个波束方向内，从而提高天线增益，因此，在无线通信系统中通常使用波束赋形技术来补偿传播过程中的上述损耗，例如，使用基于波束赋形的参考信号传输机制来进行数据传输，其中，波束赋形的参考信号可包括广播信道，同步信号，以及小区特定的参考 信号等。
当参考信号基于波束赋形技术进行传输时，一旦终端设备发生移动，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终端设备的位置，因此，终端设备在与基站的通信过程中，需要在不同赋形波束间的频繁地切换。为了保证赋形波束间切换的成功率，在切换之前，需要获取各个赋形波束对应的信道质量。例如，该信道质量可以由终端设备基于波束赋形后的同步信号或小区特定参考信号来进行测量，然后由终端设备将测量结果通过物理上行控制信道或物理上行共享信道上报给基站。
该信道质量的测量过程如图2所示：首先，基站向终端设备发送多个赋形波束，然后终端设备对基站发送的多个赋形波束进行测量，选择测量结果较优的W个赋形波束，并将较优的W个赋形波束的BSI上报给基站，如图2(a)所示，这W个赋形波束为基站的下行发送波束。然后，基站分别对多个上下行发送波束进行训练，确定与上下行发送波束对应的接收波束，如图2(e)及图2(f)所示，完成对下行发送波束和下行接收波束的测量。采用同样的方式完成上行发送波束和上行接收波束的测量，如图2(b)、图2(c)以及图2(d)所示，在此不再赘述。
当完成上述测量过程后，基站则获取和终端设备通信较优的N个波束对BPL，该N个波束对BPL可以用于下行传输的或者用于上行传输的，例如，该N个波束对BPL为N个<Bx，B’x>，和或N个<By，B’y>，Bx代表基站的发送波束，即下行发送波束，B’x代表终端设备的接收波束，即下行接收波束，By代表终端设备的发送波束，即上行发送波束，B’y代表基站的接收波束，即上行接收波束。
为了防止波束被阻挡的情况下基站和终端设备通信中段，当基站从多个时间单元获取多个波束对BPL后，则从这多个波束对BPL中确定出候选参考信号集合。当然，候选参考信号集合的配置不限于这种方式，在此就不一一例举。且，基站会为候选参考信号集合中的每个参考信号配置对应的上行资源，如随机接入资源或者物理上行控制信道资源，当终端设备确定与基站的通信链路失败时，则需要恢复与基站的通信连接，此时则通过与候选参考信号集合中的一个或多个参考信号关联的RACH资源发送波束失败恢复请求/链路失败恢复请求，重新恢复下行链路。
由于现有技术中，候选参考信号集合通常会包含多个参考信号，而多个参考信号需要配置更多的RACH资源，从而造成上行资源开销较大的问题。
鉴于此，本发明实施例提供一种链路恢复方法，在该方法中，网络设备首先为终端设备配置M个用于承载链路恢复请求信号的资源及N1个第一参考信号，该链路恢复请求信号用于在该终端设备与该网络设备之间的通信链路失败时恢复该通信链路或重配新链路的信号，该M个资源与该N1个第一参考信号相关联，该第一参考信号用于识别新链路，然后通过第一信令，将该配置信息指示给该终端设备，然后该终端设备根据该N1个第一参考信号与N2个第二参考信号，和/或根据该N1第一参考信号与N3个第三参考信号，从M个资源中确定出P个资源用于承载链路恢复请求信号，并从该P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送该链路恢复请求信号，其中，所述M个资源包含所述P个资源，该第二参考信号用于检测链路失败，该第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
在上述技术方案中，当网络设备为终端设备配置用于恢复该终端设备与该网络设备之间的通信链路的多个参考信号以及对应的资源后，还会对该多个参考信号及资源进行进一 步筛选，例如，筛除该多个参考信号用于链路失败检测和/或与PDCCH满足QCL假设关系的部分参考信号以及与该部分参考信号相关联的资源，从而网络设备和终端设备可以只使用该多个参考信号以及对应的资源中的一部分来恢复该通信链路，而对于筛除的参考信号，自然也无需再占用用于承载链路恢复请求信号的资源，例如可以将筛除的参考信号对应的用于承载链路恢复请求信号的资源释放掉，从而可以在不影响通信链路恢复的成功率的前提下，节约上行资源的开销。
下面结合附图介绍本申请实施例提供的技术方案，在下面的介绍过程中，以将本发明提供的技术方案应用在图1所示的应用场景中，以网络设备为基站，终端设备为UE为例。
请参考图3，为本申请实施例提供的一种链路恢复方法，该方法的流程描述如下：
步骤31：基站向UE发送第一信令。
在本申请实施例中，第一信令用于配置M个用于承载链路恢复请求信号的资源，该链路恢复请求信号用于在该终端设备与该网络设备之间的通信链路失败时恢复该通信链路或重配新链路的信号。该链路恢复请求信号也可以称为链路重配请求信号，第一信令可以为媒体接入控制(media access control-CE，MAC-CE)信令，或者可以为下行控制信息(downlink control information，DCI)信令，或者可以为无线资源控制(radio resource control，RRC)信令，在此不作限制。在下面的描述中，将以该信号称为链路恢复请求信号为例进行说明。
由于该用于承载链路恢复请求信号的资源可以为PUCCH资源或者PRACH资源或者其他信道资源，在下面的描述中，该用于承载链路恢复请求信号的资源为PRACH资源为例进行说明。基站可以从多个PRACH资源中随机选择一部分作为UE用于承载链路恢复请求信号的资源，也可以采用其他方式为UE配置该M个资源，在此不作限制。为了更加完整地描述本申请中的链路恢复方法，下面以基站将与多个参考信号对应的信道资源作为该M个用于承载链路恢复请求信号的资源为例进行说明。
在本申请实施例中，在基站执行步骤31之前还可以包括步骤32：基站为UE配置M个资源。
在本申请实施例中，基站可以先为UE配置多个参考信号，然后则根据该参考信号配置该M个资源，该参考信号可以包含N1个第一参考信号、N2个第二参考信号以及N3个第三参考信号。基站可以同时为UE配置这三个参考信号，也可以先配置第一参考信号，然后在配置第二参考信号，最后配置第三参考信号，也可以是先配置第二参考信号，然后配置第三参考信号最后配置第一参考信号，也就是说这三个参考信号的配置顺序不作限制。当然，基站也可以确定出其他用途的参考信号，在本申请实施例中仅以基站为UE配置N1个第一参考信号、N2个第二参考信号以及N3个第三参考信号为例进行说明，M、N1，N2，N3为大于等于1的整数。
下面对第一参考信号、第二参考信号以及第三参考信号的作用进行说明。
第一参考信号用于识别新链路，其中，识别新链路即UE可以通过测量N1个第一参考信号的质量，从中选择与一个或多个满足预设条件的第一参考信号对应的PRACH资源，确定该资源为UE和基站进行通信的新链路的过程，该预设条件可以是高于预设门限。或者，第一参考信号也可以称为该基站为UE配置的用于恢复该UE与该基站之间的通信链路的参考信号，也可以称为信道质量满足预定门限条件的参考信号。该预定门限条件可以是大于等于一个具体参数的取值，例如，可以以参考信号的BSI为依据设置门限条件，以 RSPR为例，该预定门限条件可以是RSPR大于等于-60dBm。当然，也可以是其他门限条件，在此不作限制。
第二参考信号用于检测链路失败，即UE可以通过检测第二参考信号的信道质量来确定UE与基站之间的通信链路是否失败，当所有第二参考信号的信道质量均低于预设的阈值时，或者当N2个第二参考信号中的预设数量的第二参考信号的信道质量低于预设的阈值时，则确定UE与基站之间的通信链路失败。需要说明的是，可选的，这里的第二参考信号为与PDCCH的DMRS满足QCL假设关系的参考信号，在此不再赘述。
第三参考信号为与物理下行控制信道(physical downlink control channel，PDCCH)满足准共址QCL假设关系的参考信号，即与PDCCH的解调参考信号(demodulation reference signal，DMRS)满足QCL假设关系的参考信号。
基站为UE配置多个参考信号的过程与现有技术相同，在此不再赘述。
当基站为UE配置多个参考信号后，则基站根据这多个参考信号中的第一参考信号为UE配置该M个用于承载链路恢复请求信号的资源。在本申请实施例中，基站为UE配置的M个用于承载链路恢复请求信号的资源与N1个第一参考信号相关联。即N1个第一参考信号中的参考信号与PRACH资源为一一对应的关系，也可以是N1个第一参考信号中的多个第一参考信号配置同一个PRACH资源，也可以是基站为一个第一参考信号配置多个PRACH资源，在此不作限制。
需要说明的是，由于M个资源与N1个第一参考信号相关联，因此，基站发送的第一信令中，可以只指示M个资源，则UE可以根据M个资源便获知基站为其配置的N1个第一参考信号；或者基站可以在第一信令中同时指示M个资源以及N1个第一参考信号，在本申请实施例中不作限制。
步骤33：UE从P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送该链路恢复请求信号。
当UE接收基站发送的第一信令后，UE则获知基站为其配置的M个资源。由于该M个资源是用于恢复UE与基站之间的通信链路的，若该M个资源被占用，例如，该M个资源中的某个资源对应的参考信号被用于检测UE与基站之间的通信链路是否失败，或者该某个资源对应的参考信号与PDCCH满足QCL假设关系，则当UE与基站发生链路失败时，UE则可能无法使用该资源迅速恢复与基站的通信，因此，在本申请实施例中，当UE获知M个资源后，需要从M个资源中选择P个资源用来承载该链路恢复请求信号，这样，当UE确定与基站之间的通信链路失败时，则从P个资源中选择一个或多个资源发送该链路请求信号。
在本申请实施例中，该M个资源包含该P个资源，该P个资源的确定方式有如下两种：
第一种方式：
该P个资源是UE根据该N1个第一参考信号与N2个第二参考信号确定的资源和/或该P个资源是UE根据该N1第一参考信号与N3个第三参考信号确定的资源，P为大于等于1且小于M的整数。具体来讲，该P个资源可以是UE根据第一参考信号及第二参考信号确定的，也可以是UE根据第一参考信号及第三参考信号确定的，也可以是UE根据第一参考信号、第二参考信号以及第三参考信号确定。
第二种方式：
该P个资源是UE根据基站的发送的指令确定。例如，基站可以向UE指示一部分资源，该资源即为P个资源，或者M个资源中除基站指示的该部分资源外的剩余资源为P个资源等。
下面则对这两种方式进行详细说明。
针对第一种方式：
该P个资源与该N1个第一参考信号中除目标参考信号外的参考信号相关联，其中，该目标参考信号为该N2个第二参考信号中的至少一个参考信号和/或该N3个第三参考信号中的至少一个参考信号。所述P个资源是所述M个资源中与N1个第一参考信号中的目标参考信号不关联的的资源中的至少一个资源，或所述P个资源是所述M个资源中与N1个第一参考信号中除目标参考信号外的参考信号相关联的的资源中的至少一个资源。即，在本申请实施例中，将M个资源中与第二参考信号和/或第三参考信号相关联的资源去除，从而UE只使用剩下的资源恢复通信链路，从而N1个第一参考信号中与第二参考信号和/或第三参考信号相同的参考信号也无需再占用用于承载链路恢复请求信号的资源，从而减小上行资源的开销。
在本申请实施例中，目标参考信号可以有如下四种情况：
第一种情况：目标参考信号为第一参考信号中用于链路失败检测的参考信号。在这种情况下，目标参考信号为N1个第一参考信号与N2个第二参考信号的交集。请参考图4，假设N1个第一参考信号构成集合A，N2个第二参考信号构成集合B，则目标参考信号为集合C包含的参考信号。
第二种情况：目标参考信号为候第一考信号中与PDCCH满足QCL假设关系的参考信号。在这种情况下，目标参考信号为N1个第一参考信号与N3个第三参考信号的交集。请参考图5，假设N1个第一参考信号构成集合A，N3个第三参考信号构成集合D，则目标参考信号为集合E包含的参考信号。
第三种情况：目标参考信号为第一参考信号中既能够用于链路失败检测也能够与PDCCH满足QCL假设关系的参考信号。在这种情况下，目标参考信号为N1个第一参考信号与N2个第二参考信号以及N3个第三参考信号的交集。请参考图6，假设N1个第一参考信号构成集合A，N3个第三参考信号构成集合D，N2个第二参考信号构成集合B，则目标参考信号为集合F包含的参考信号。
第四种情况：目标参考信号为第一参考信号中与PDCCH满足QCL假设关系的参考信号与候选参考信号中用于链路失败检测的参考信号的之和。在这种情况下，目标参考信号为两个交集的和，第一个交集为N1个第一参考信号与N2个第二参考信号的交集，第二个交集为N1个第一参考信号与N3个第三参考信号的交集。请参考图7，假设N1个第一参考信号构成集合A，N3个第三参考信号构成集合D，N2个第二参考信号构成集合B，则目标参考信号为集合C和集合E包含的参考信号。
当然，目标参考信号也可以有其他种组合情况，在本申请实施例中不一一例举。
由于UE确定目标参考信号需要获知基站为其配置的N2第二参考信号和/或N3个第三参考信号，因此，请参考图3A，在执行步骤33之前，本申请实施例还包括：
步骤34：基站发送第二信令或第三信令。
在本申请实施例中，该第二信令指示该N3个第三参考信号，其中，该N3个第三参考信号中的至少一个参考信号为该目标参考信号。第一信令的信令类型可以为RRC，第二信 令的信令可以为RRC或者MAC-CE或者DCI；第一信令的类型也可以是MAC-CE,第二信令的信令类型可以是DCI。第三信令的信令类型可以参照第二信令，在此不再赘述。
需要说明的是，第一信令和第二信令可以是多个信令也可以是一条信令。第二信令和第三信令也可以为同一条信令。
在本申请实施例中，该第二信令可以直接指示N3个第三参考信号的索引或者其他标识信息，或者该第二信令用于指示N3个第三参考信号的QCL信息，QCL信息中指示PDCCH的DMRS与第三参考信号满足QCL假设关系，也就间接指示了第三参考信号。
在本申请实施例中，该第二信令除了指示N3个第三参考信号，还可以隐式地指示如下信息，即该第二信令的同一个字段可以指示N3个第三参考信号，还可以指示如下信息：
第一种：该第二信令用于指示UE使用该N1个第一参考信号中的该目标参考信号检测链路失败。
也就是说，当UE接收该第二信令后，则确定了N3个第三参考信号以及确定使用N1个第一参考信号中与PDCCH满足QCL假设关系的第一参考信号来检测链路是否失败。
第二种：第二信令用于指示UE使用该N3个第三参考信号检测链路失败。
也就是说，当UE接收该第二信令后，则确定了N3个第三参考信号即为N2个第二参考信号。在这种情况下，第二信令既指示了PDCCH的QCL信息，即PDCCH的DMRS与N3个第三参考信号满足QCL关系，也指示了N2个第二参考信号的QCL信息。
第三种：该第二信令用于指示UE禁止使用该目标参考信号识别新链路。
也就是说，当UE接收该第二信令后，则确定了N3个第三参考信号以及确定不使用N1个第一参考信号中与PDCCH满足QCL假设关系的第一参考信号来识别新链路。
第四种：该第二信令用于指示UE使用该N1个第一参考信号中的除该目标参考信号外的参考信号识别新链路。
也就是说，当UE接收该第二信令后，则确定了N3个第三参考信号以及确定使用N1个第一参考信号中除与PDCCH满足QCL假设关系的参考信号外的第一参考信号来识别新链路。
第五种：该第二信令用于指示UE使用该N1个第一参考信号中的该目标参考信号检测链路失败以及该第二信令用于指示UE禁止使用该目标参考信号识别新链路。
第六种：该第二信令用于指示UE使用该N1个第一参考信号中的该目标参考信号检测链路失败以及该第二信令用于指示UE使用该N1个第一参考信号中的除该目标参考信号外的参考信号识别新链路。
第七种：第二信令用于指示UE使用该N3个第三参考信号检测链路失败以及该第二信令用于指示UE禁止使用该目标参考信号识别新链路
第八种：第二信令用于指示UE使用该N3个第三参考信号检测链路失败以及该第二信令用于指示UE使用该N1个第一参考信号中的除该目标参考信号外的参考信号识别新链路。
上述第六种至第八种指示的内容为前述四种指示内容的组合，在此不再赘述。当然，本领域技术人员也可以根据第一种至第八种情况，确定出其他指示内容的组合，在此不再一一例举。
需要说明的是，基站指示UE为其分配的N3个第三参考信号后，基站也可以根据该 信令确定出该目标参考信号，从而基站也确定了前述第一种至第八种指示内容。
另外需要说明的是，“禁止使用”可以理解为“不使用”，例如，第二信令用于指示UE禁止使用该目标参考信号识别新链路，可以理解为第二信令用于指示UE不使用该目标参考信号识别新链路。基站确定使用该N1个第一参考信号中的该目标参考信号检测链路失败，可以理解为基站激活该N1个第一参考信号集合中的目标参考信号为用于链路失败检测，同理，基站确定不使用该目标参考信号识别新链路，可以理解为基站去激活该N1个第一参考信号中的目标参考信号。信令中其他指示内容可以采用同样的方式理解，在此不再赘述。
基站确定不使用某个参考信号用来识别新链路，则基站可以释放与该参考信号关联的资源。例如，基站指示了N3个第三参考信号，则基站可以释放N1个第一参考信号中与该指示的参考信号中重合的参考信号关联的PRACH资源。
需要说明的是，基站根据该信令去激活该目标参考信号或激活该目标参考信号为用于链路失败检测的参考信号为可选步骤，即该步骤不是必须执行的。
在本申请实施例中，该第三信令指示该N2个第二参考信号，其中，该N2个第二参考信号中的至少一个参考信号为该目标参考信号。
在本申请实施例中，该第三信令可以直接指示N2个第二参考信号的索引或者其他标识信息。
在本申请实施例中，该第三信令除了指示N2个第二参考信号，还可以指示如下信息：
第一种：该第三信令用于指示UE禁止使用该N1个第一参考信号中的该目标参考信号识别新链路。
也就是说，当UE接收该第三信令后，则确定了N2个第二参考信号以及确定不使用N1个第一参考信号中用来检测链路失败的参考信号来识别新链路。
第二种：第三信令用于指示UE使用该N1个第一参考信号中的除该目标参考信号外的参考信号识别新链路。
也就是说，当UE接收该第三信令后，则确定了N2个第二参考信号以及确定使用N1个第一参考信号中除用来检测链路失败的参考信号外的第一参考信号来识别新链路。
需要说明的是，基站指示UE为其分配的N2个第二参考信号后，基站也可以根据该信令确定出该目标参考信号，从而基站也确定了前述第一种至第二种指示内容。
另外需要说明的是，基站确定使用该N1个第一参考信号中的除该目标参考信号外的参考信号识别新链路，可以理解为基站去激活该目标参考信号，同理，基站确定不使用该目标参考信号识别新链路，可以理解为基站去激活该N1个第一参考信号中的目标参考信号。
基站确定不使用某个参考信号用来识别新链路，则基站可以释放与该参考信号关联的资源。例如，基站指示了N2个第二参考信号，则基站可以释放N1个第一参考信号中与该指示的参考信号中重合的参考信号关联的PRACH资源。
需要说明的是，基站根据该信令去激活该目标参考信号或激活该目标参考信号为用于链路失败检测的参考信号为可选步骤，即该步骤不是必须执行的。
步骤35：UE确定目标参考信号。
当UE接收基站发送的第二信令或第三信令，则UE确定第二信令中指示的N3个第三参考信号中的至少一个参考信号为目标参考信号或者UE确定第三信令中指示的N2个第 二参考信号中的至少一个参考信号为目标参考信号。
具体来讲，UE在确定N3个第三参考信号后，则确定N3个第三参考信号中与N1个第一参考信号中相同的参考信号，该相同的参考信号即为目标参考信号。或者，当UE确定N2个第二参考信号后，则确定N2个第二参考信号中与N1个第一参考信号中相同的参考信号，该相同的参考信号即为目标参考信号。
在执行完步骤35后，则执行步骤33。
当UE确定目标参考信号后，则UE确定M个资源中除去与目标参考信号关联的资源即为用于承载链路恢复请求信号的P个资源。
例如，目标参考信号为第一参考信号1以及第一参考信号2，且与第一参考信号2关联的PRACH资源为PRACH资源1和PRACH资源2，与第一参考信号3关联的PRACH资源为PRACH资源3，从而，UE确定M个资源中除去PRACH资源1～PRACH资源3，剩余的PRACH资源即为能够用于承载链路恢复请求信号的P个资源。
当UE确定与基站之间的通信链路失败时，或者在通信链路失败之后，则UE可以通过检测与P个资源相关联的第一参考信号的信道质量，根据信道质量从P个资源中选择其中一个或者多个资源发送该链路恢复请求信号，当基站响应该链路恢复请求信号后，则恢复与基站的通信链路。
针对第二种方式：
请参考图3B，在执行步骤33之前，本申请实施例还包括：
步骤36：基站发送第四信令或第五信令或第六信令。
在本申请实施例中，该第四信令指示K1个第一参考信号，其中，该P个资源与所述K1个第一参考信号相关联，该N1个第一参考信号包含所述K1个第一参考信号，该K1为大于等于1且小于等于N1的整数。在本申请实施例中，第一信令的信令类型可以为RRC，第四信令的信令可以为RRC或者MAC-CE或者DCI；第一信令的类型也可以是MAC-CE,第四信令的信令类型可以是DCI。第五信令与第六信令的信令类型可以参考第四信令，在此不再赘述。
在本申请实施例中，该第四信令可以直接指示K1个第一参考信号的索引或者其他标识信息。该第四信令指示该K1个第一参考信号为最终用于恢复UE与基站之间的通信链路的参考信号。当K1＝N1时，即基站为UE配置的M个资源都可以用来承载链路恢复请求信号，P＝M。在这种情况下，基站也可以不发送该第四信令。例如，基站和UE约定，若在一预设时间内没有发送除第一信令外的其他信令，则默认该P＝M。当然，基站和UE也可以采用其他实现方式实现上述目标，在此不作限制。
需要说明的是，基站向UE指示K1个第一参考信号后，基站也可以根据该信令确定出与该K1个第一参考信号关联的资源为P个用于承载链路恢复请求信号的资源。
另外需要说明的是，基站确定P个用于承载链路恢复请求信号的资源，可以理解为基站激活该K1个第一参考信号用于恢复UE与基站之间的通信链路，或者基站可以释放N1个第一参考信号中除该K1个第一参考信号外的第一参考信号相关联PRACH资源。
当然，基站根据该信令激活该K1个第一参考信号用于恢复UE与基站之间的通信链路或释放N1个第一参考信号中除该K1个第一参考信号外的第一参考信号相关联PRACH资源均为可选步骤，即该步骤不是必须执行的。
在本申请实施例中，该第五信令指示K2个第一参考信号，其中，该P个资源与该N1 个第一参考信号中除该K2个第一参考信号外的至少一个第一参考信号相关联，该N1个第一参考信号包含该K2个第一参考信号，K2为大于等于1且小于等于N1的整数。
在本申请实施例中，该第五信令可以直接指示K2个第一参考信号的索引或者其他标识信息。该第五信令指示该K2个第一参考信号为最终不用于恢复UE与基站之间的通信链路的参考信号。
需要说明的是，基站向UE指示K2个第一参考信号后，基站也可以根据该信令确定出与该K2个第一参考信号关联的资源不是用于承载链路恢复请求信号的资源。
另外需要说明的是，基站确定与该K2个第一参考信号关联的资源不是用于承载链路恢复请求信号的资源，可以理解为基站去激活该K2个第一参考信号，或者基站可以释放与该K2个第一参考信号相关联PRACH资源。
当然，基站根据该信令去激活该K2个第一参考信号或释放与该K2个第一参考信号相关联PRACH资源均为可选步骤，即该步骤不是必须执行的。
在本申请实施例中，该第六指令指示L个用于承载链路恢复请求信号的资源，其中，该P个资源为该M个资源中除该L个资源外的资源或该P个资源为该L个资源，M个资源包含L个资源。
在本申请实施例中，该第六信令可以直接指示L个用于承载链路恢复请求信号的资源的索引或者其他标识信息。该第六信令指示该L个资源为最终用于承载链路恢复请求信号的资源或者该L个资源为最终不用于承载链路恢复请求信号的资源。具体第六信令指示的L个资源的所表征的含义可由基站和UE之间进行约定。例如，基站和UE约定好若信令中指示L个资源则默认该资源为用于承载链路恢复请求信号的资源，则UE在接收到该信令后，确定该L个资源为P个资源。
需要说明的是，基站向UE指示L个资源后，基站也确定该L个资源为用于承载链路恢复请求信号的资源或该L个资源不用于承载链路恢复请求信号的资源。
另外需要说明的是，基站确定该L个资源为用于承载链路恢复请求信号的资源，可以理解为基站激活与L个资源相关联的第一参考信号。以及，基站该L个资源不用于承载链路恢复请求信号的资源，可以理解为基站去激活与M个资源中除L个资源外的资源相关联的第一参考信号，或者理解为释放该L个资源。
当然，基站根据该信令激活与L个资源相关联的第一参考信号或者基站去激活与M个资源中除L个资源外的资源相关联的第一参考信号，或者释放该L个资源，均为可选步骤，即该步骤不是必须执行的。
在执行完步骤36后，则执行步骤33。
步骤33的执行过程与第一种方式中相同，在此不再赘述。
需要说明的是，该第一信令、该第二信令、该第三信令、该第四信令、该第五信令、该第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。该层一信令可以为MAC-CE信令，该层二信令可以为DCI信令，该层三信令可以为RRC信令。第一信令～第六信令中的任意一个信令可以采用三种信令方式的任意一种或者多种，例如，第一信令可以发送多次，第一次采用层三信令，第二次采用层二信令，当然，也可以是一次发送时拆分在不同的信令中，在此不作限制。
第一信令与第二信令的分别是：可选的RRC与RRC和或MAC-CE和或DCI(优选的是RRC和MAC-CE或DCI)；可选的第一信令是MAC-CE,第二信令是DCI.
另外，由于层一信令和层二信令的传输速度要高于层三信令，因此，为了使UE能够尽快确定用于承载链路恢复请求信号的资源，基站发送的第二信令～第六信令的信令层级可以高于第一信令。例如，当第一信令采用RRC信令时，第二信令～第六信令可以采用MAC-CE信令或者DCI信令；当第一信令采用MAC-CE信令时，第二信令～第六信令可以采用DCI信令。
接下来将通过具体的实例来说明本申请实施例中的目标参考信号以及基站对目标参考信号以及与目标参考信号相关联的PRACH资源的一种可能的处理过程。在下面的实例中，以基站采用步骤31中的方法，为UE配置了三个参考信号集合，分别为集合A、集合B和集合C，集合A为N3个第三参考信号构成的集合，即集合A为与PDCCH满足QCL假设关系的参考信号集合，集合B为N2个第二参考信号构成的集合，即集合B为用于检测链路失败的参考信号集合，集合C为N1个第一参考信号构成的集合，即集合C为用于恢复UE与基站之间的通信链路的参考信号集合。其中，集合A为资源池集合M的子集，集合B为资源池集合N的子集，集合C为资源池集合K的子集。
请参考图8，资源池集合M、资源池集合N以及资源池集合K中任意两个集合的交集为空集，则此时目标参考信号为空集，基站可以不用释放与集合C中的参考信号关联的PRACH资源。
请参考图9，资源池集合M与资源池集合N的交集为空集，资源池集合M与资源池集合K的交集不为空集，则当基站通过信令激活集合A时，目标参考信号为集合A在集合C的部分参考信号或集合A在资源池集合K的部分参考信号，基站可以去激活集合A在集合C的部分参考信号或者基站可以去激活集合A在资源池集合K的部分参考信号，目标参考信号为从而释放与该部分参考信号对应的PRACH资源。
请参考图10，资源池集合M与资源池集合N的交集为空集，资源池集合N与资源池集合K的交集不为空集，则当基站通过信令激活集合B时，目标参考信号为集合B在集合C的部分参考信号或集合B在资源池集合K的部分参考信号，基站可以去激活集合B在集合C的部分参考信号或者基站可以去激活集合B在资源池集合K的部分参考信号，从而释放与该部分参考信号对应的PRACH资源。
请参考图11，资源池集合M与资源池集合N的交集不为空集，资源池集合N与资源池集合K的交集为空集，则此时目标参考信号为空集，基站可以不用释放与集合C中的参考信号关联的PRACH资源。
请参考图12，资源池集合M与资源池集合N的交集不为空集，资源池集合N与资源池集合K的交集不为空集，则当基站通过信令激活集合B时，目标参考信号为集合B在集合C的部分参考信号或集合B在资源池集合K的部分参考信号，基站可以去激活集合B在集合C的部分参考信号或者基站可以去激活集合B在资源池集合K的部分参考信号，从而释放与该部分参考信号对应的PRACH资源。
请参考图13，资源池集合N与资源池集合K相同，资源池集合M与资源池集合N的交集为空集，且集合B与集合C的和不为集合N，则当基站通过信令激活集合B时，目标参考信号为集合B在集合C的部分参考信号或集合B在资源池集合K的部分参考信号，基站可以去激活基站可以去激活集合B在集合C的部分参考信号或者基站可以去激活集合B在资源池集合K的部分参考信号，从而释放与该部分参考信号对应的PRACH资源。
请参考图14，资源池集合N与资源池集合K相同，资源池集合M与资源池集合N的 交集为空集，集合B与集合C的和为集合N，且集合B和集合C没有交集，则当基站通过信令激活集合B时，目标参考信号为空集，则基站可以直接激活资源池集合N中的剩余参考信号作为候选参考信号，此时不用释放任何PRACH资源。
请参考图15，资源池集合N与资源池集合K相同，资源池集合M与资源池集合N的交集为空集，集合B与集合C的和为集合N，且集合B和集合C有交集，则当基站通过信令激活集合B时，目标参考信号为集合B在集合C的部分参考信号或集合B在资源池集合K的部分参考信号，基站可以去激活集合B在集合C的部分参考信号或者基站可以去激活集合B在资源池集合K的部分参考信号，从而释放与该部分参考信号对应的PRACH资源。
请参考图16，资源池集合N与资源池集合K相同，资源池集合M与资源池集合N的交集不为空集，集合B与集合C的和不为集合N，则当基站通过信令激活集合A或集合B时，目标参考信号为集合A或集合B在集合C的部分参考信号，或目标参考信号为集合A或集合B在资源池集合K的部分参考信号，基站可以去激活集合A或集合B在集合C的部分参考信号，或者基站可以去激活集合A或集合B在资源池集合K的部分参考信号，从而释放与该部分参考信号对应的PRACH资源。
请参考图17，资源池集合N与资源池集合K相同，资源池集合M与资源池集合N的交集不为空集，集合B与集合C的和为集合N，则当基站通过信令激活集合A或集合B时，基站可以直接激活资源池集合N中除集合B外的剩余参考信号作为候选参考信号，此时，目标参考信号为集合A或集合B在集合C的部分参考信号，或目标参考信号为集合A或集合B在资源池集合K的部分参考信号，基站还可以去激活集合A或集合B在集合C的部分参考信号，或者基站可以去激活集合A或集合B在资源池集合K的部分参考信号，从而释放与该部分参考信号对应的PRACH资源。
请参考图18A-图18C，资源池集合N、资源池集合M与资源池集合K相同，则当基站通过信令激活集合A时，目标参考信号为集合A在集合C的部分参考信号，或目标参考信号为集合A在资源池集合K的部分参考信号，基站可以去激活集合A在集合C或资源池集合K中的部分参考信号，从而释放与该部分参考信号对应的PRACH资源，如图18A所示；或者当基站激活集合B时，目标参考信号为集合B在集合C的部分参考信号，或目标参考信号为集合B在资源池集合K的部分参考信号，基站可以去激活集合B在集合C或集合K中的部分参考信号，从而释放与该部分参考信号对应的PRACH资源，如图18B所示；或者当集合A、集合B和集合C均为交集，基站通过信令激活集合A和集合B时，目标参考信号为集合A以及集合B，基站激活集合N中的剩余参考信号作为集合C，释放与集合A以及集合B中的参考信号对应的PRACH资源，如图18C所示。
在上述技术方案中，当网络设备为终端设备配置用于恢复该终端设备与该网络设备之间的通信链路的多个参考信号以及对应的资源后，还会对该多个参考信号及资源进行进一步筛选，例如，筛除该多个参考信号用于链路失败检测和/或与PDCCH满足QCL假设关系的部分参考信号以及与该部分参考信号相关联的资源，从而网络设备和终端设备可以只使用该多个参考信号以及对应的资源中的一部分来恢复该通信链路，而对于筛除的参考信号，自然也无需再占用任何资源，例如可以将筛除的参考信号对应的资源释放掉，从而可以在不影响通信链路恢复的成功率的前提下，节约上行资源的开销。
上述本申请提供的实施例中，分别从各个网元本身，以及各个网元之间交互的角度对 本申请实施例提供的链路恢复方法进行了介绍。可以理解的是，各个网元，例如UE、基站等为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，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，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，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。
图19示出了网络设备1900的一种可能的结构示意图。该网络设备1900可以实现上述实施例中涉及的基站的功能。该网络设备1900包括发送模块1901和处理模块1902。
发送模块1901用于为向终端设备发送第一信令；
其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
处理模块1902用于从P个用于承载链路恢复请求信号的资源中检测所述链路恢复请求信号；
其中，所述M个资源包含所述P个资源，所述P个资源是所述网络设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述网络设备根据所述N1第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
在一种可能的设计中，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述N3个第三参考信号中的至少一个参考信号。
在一种可能的设计中，发送模块1901还用于：
向所述终端设备发送第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
所述第二信令用于指示所述N2个第二参考信号的QCL信息。
在一种可能的设计中，所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，发送模块1901还用于：
向所述终端设备发送第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，发送模块1901还用于：
向所述终端设备发送第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
在一种可能的设计中，发送模块1901还用于：
向所述终端设备发送第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数。
在一种可能的设计中，发送模块1901还用于：
向所述终端设备发送第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
在一种可能的设计中，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
图20示出了终端设备2000的一种可能的结构示意图。该终端设备2000可以实现上述实施例中涉及的UE的功能。该终端设备2000包括接收模块2001和处理模块2002。
接收模块2001用于接收网络设备发送的第一信令；
其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
处理模块2002用于从P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送所述链路恢复请求信号；
其中，所述M个资源包含所述P个资源，所述P个资源是所述终端设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述终端设备根据所述N1第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
在一种可能的设计中，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述N3个第三参考信号中的至少一个参考信号。
在一种可能的设计中，接收模块2001还用于：
接收所述网络设备发送的第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第二信令用于指示所述终端设备使用所述N1个第一参考 信号中的所述目标参考信号检测链路失败；或
所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
所述第二信令用于指示N2个第二参考信号的QCL信息。
在一种可能的设计中，所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，接收模块2001还用于：
接收所述网络设备发送的第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，接收模块2001还用于：
接收所述网络设备发送的第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
在一种可能的设计中，接收模块2001还用于：
接收所述网络设备发送的第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数
在一种可能的设计中，接收模块2001还用于：
接收所述网络设备发送的第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
在一种可能的设计中，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本申请实施例中，网络设备1900和终端设备2000对应各个功能划分各个功能模块的形式来呈现，或者，可以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit，ASIC)，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
在一个简单的实施例中，本领域的技术人员可以想到，还可以将网络设备1900通过如图21所示的结构实现，将终端设备2000通过如图22所示的结构实现。下面将对图21及图22所示的结构进行介绍。
如图21所示，网络设备2100可以包括发送器2101、处理器2102以及接收器2103。 在实际应用中，图19中的发送模块1901对应的实体设备可以是发送器2101，处理模块1902对应的实体设备可以是处理器2102。
其中，处理器2102可以是中央处理器(CPU)或特定应用集成电路(Application Specific Integrated Circuit，ASIC)，可以是一个或多个用于控制程序执行的集成电路，可以是基带芯片，等等。
所述设备还可以包括存储器，存储器可以通过总线结构或者星型结构或者其它结构与处理器2102相连接，或者也可以通过专门的连接线分别与处理器2102连接，在图21中以总线结构为例。存储器的数量可以是一个或多个，存储器可以是只读存储器(Read Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)或磁盘存储器，等等。
发送器2101用于在处理器2102的控制下向终端设备发送第一信令；
其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
接收器2103，用于在处理器2102的控制下从P个用于承载链路恢复请求信号的资源中检测所述链路恢复请求信号；
其中，所述M个资源包含所述P个资源，所述P个资源是所述网络设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述网络设备根据所述N1第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
在一种可能的设计中，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述N3个第三参考信号中的至少一个参考信号。
在一种可能的设计中，发送器2101还用于：
向所述终端设备发送第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
所述第二信令用于指示所述N2个第二参考信号的QCL信息。
在一种可能的设计中，所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，发送器2101还用于：
向所述终端设备发送第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第三信令用于指示所述终端设备禁止使用所述目标参考信 号识别新链路；或
所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，发送器2101还用于：
向所述终端设备发送第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
在一种可能的设计中，发送器2101还用于：
向所述终端设备发送第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数。
在一种可能的设计中，发送器2101还用于：
向所述终端设备发送第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
在一种可能的设计中，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
如图22所示，终端设备2200可以包括接收器2201、处理器2202以及发送器2203。在实际应用中，图20中的接收模块2001对应的实体设备可以是接收器2201，处理模块2002对应的实体设备可以是处理器2202。
其中，处理器2202可以是中央处理器(CPU)或特定应用集成电路(Application Specific Integrated Circuit，ASIC)，可以是一个或多个用于控制程序执行的集成电路，可以是基带芯片，等等。
所述设备还可以包括存储器，存储器可以通过总线结构或者星型结构或者其它结构与处理器2202相连接，或者也可以通过专门的连接线分别与处理器2202连接，在图22中以总线结构为例。存储器的数量可以是一个或多个，存储器可以是只读存储器(Read Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)或磁盘存储器，等等。
接收器2201用于在处理器2202的控制下接收网络设备发送的第一信令；
其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
发送器2203用于在处理器2202的控制下从P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送所述链路恢复请求信号；
其中，所述M个资源包含所述P个资源，所述P个资源是所述终端设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述终端设备根据所述N1第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1， N2，N3，P为大于等于1的整数。
在一种可能的设计中，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述N3个第三参考信号中的至少一个参考信号。
在一种可能的设计中，接收器2201还用于：
接收所述网络设备发送的第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
所述第二信令用于指示N2个第二参考信号的QCL信息。
在一种可能的设计中，所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，接收器2201还用于：
接收所述网络设备发送的第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
在一种可能的设计中，所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
在一种可能的设计中，接收器2201还用于：
接收所述网络设备发送的第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
在一种可能的设计中，接收器2201还用于：
接收所述网络设备发送的第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数
在一种可能的设计中，接收器2201还用于：
接收所述网络设备发送的第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
在一种可能的设计中，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
在一种可能的设计中，网络设备2100和终端设备2200可以是现场可编程门阵列(field-programmable gate array，FPGA)，专用集成芯片(application specific integrated circuit，ASIC)，系统芯片(system on chip，SoC)，中央处理器(central processor unit，CPU)，网 络处理器(network processor，NP)，数字信号处理电路(digital signal processor，DSP)，微控制器(micro controller unit，MCU)，还可以采用可编程控制器(programmable logic device，PLD)或其他集成芯片。
本申请所提供的网络设备和终端设备可以是一种芯片系统，所述芯片系统中可以包含至少一个芯片，也可以包含其他分立器件。所述芯片系统可以置于网络设备或者终端设备中，支持所述网络设备或终端设备完成本申请实施例中所提供的链路恢复方法。
本申请实施例提供一种计算机存储介质，所述计算机存储介质中存储有指令，当所述指令在计算机上运行时，使得所述计算机执行前述链路恢复方法。
本申请实施例提供一种计算机程序产品，所述计算机程序产品包含有指令，当所述指令在计算机上运行时，使得所述计算机执行前述链路恢复方法。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如，固态硬盘Solid State Disk(SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (46)

  1. 一种链路恢复方法，其特征在于，包括：
    终端设备接收网络设备发送的第一信令；
    其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
    所述终端设备从P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送所述链路恢复请求信号；
    其中，所述M个资源包含所述P个资源，所述P个资源是所述终端设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述终端设备根据所述N1个第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
  2. 根据权利要求1所述的方法，其特征在于，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述目标参考信号为所述N3个第三参考信号中的至少一个参考信号。
  3. 根据权利要求2所述的方法，其特征在于，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述方法还包括：
    所述终端设备接收所述网络设备发送的第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
  4. 根据权利要求3所述的方法，其特征在于，
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
    所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
    所述第二信令用于指示N2个第二参考信号的QCL信息。
  5. 根据权利要求3或4所述的方法，其特征在于，
    所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  6. 根据权利要求2所述的方法，其特征在于，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述方法还包括：
    所述终端设备接收所述网络设备发送的第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
  7. 根据权利要求6所述的方法，其特征在于，
    所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  8. 根据权利要求1所述的方法，其特征在于，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述方法还包括：
    所述终端设备接收所述网络设备发送的第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
  9. 根据权利要求1所述的方法，其特征在于，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述方法还包括：
    所述终端设备接收所述网络设备发送的第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数。
  10. 根据权利要求1所述的方法，其特征在于，在所述终端设备选择至少一个资源用于承载并发送所述链路恢复请求信号之前，所述方法还包括：
    所述终端设备接收所述网络设备发送的第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
  11. 根据权利要求1-10中任一项所述的方法，其特征在于，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
  12. 一种链路恢复方法，其特征在于，包括：
    网络设备向终端设备发送第一信令；
    其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
    所述网络设备从P个用于承载链路恢复请求信号的资源中检测所述链路恢复请求信号；
    其中，所述M个资源包含所述P个资源，所述P个资源是所述网络设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述网络设备根据所述N1第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
  13. 根据权利要求12所述的方法，其特征在于，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述目标参考信号为所述N3个第三参考信号中的至少一个参考信号。
  14. 根据权利要求13所述的方法，其特征在于，在所述网络设备检测所述链路恢 复请求信号之前，所述方法还包括：
    所述网络设备向所述终端设备发送第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
  15. 根据权利要求14所述的方法，其特征在于，
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
    所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
    所述第二信令用于指示所述N2个第二参考信号的QCL信息。
  16. 根据权利要求14或15所述的方法，其特征在于，
    所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  17. 根据权利要求13所述的方法，其特征在于，在所述网络设备检测所述链路恢复请求信号之前，所述方法还包括：
    所述网络设备向所述终端设备发送第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
  18. 根据权利要求17所述的方法，其特征在于，
    所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  19. 根据权利要求12所述的方法，其特征在于，在所述网络设备检测所述链路恢复请求信号之前，所述方法还包括：
    所述网络设备向所述终端设备发送第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
  20. 根据权利要求12所述的方法，其特征在于，在所述网络设备选择至少一个资源检测所述链路恢复请求信号之前，所述方法还包括：
    所述网络设备向所述终端设备发送第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数。
  21. 根据权利要求12所述的方法，其特征在于，在所述网络设备检测所述链路恢复请求信号之前，所述方法还包括：
    所述网络设备向所述终端设备发送第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
  22. 根据权利要求12-21中任一项所述的方法，其特征在于，所述第一信令、所 述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
  23. 一种终端设备，其特征在于，包括接收器、处理器以及发送器，其中：
    所述接收器，用于在所述处理器的控制下接收网络设备发送的第一信令；
    其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
    所述发送器，用于在所述处理器的控制下从P个用于承载链路恢复请求信号的资源中选择至少一个资源用于承载并发送所述链路恢复请求信号；
    其中，所述M个资源包含所述P个资源，所述P个资源是所述终端设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述终端设备根据所述N1第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
  24. 根据权利要求23所述的终端设备，其特征在于，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述目标参考信号为所述N3个第三参考信号中的至少一个参考信号。
  25. 根据权利要求24所述的终端设备，其特征在于，所述接收器还用于：
    接收所述网络设备发送的第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
  26. 根据权利要求25所述的终端设备，其特征在于，
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
    所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
    所述第二信令用于指示N2个第二参考信号的QCL信息。
  27. 根据权利要求25或26所述的终端设备，其特征在于，
    所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  28. 根据权利要求24所述的终端设备，其特征在于，所述接收器还用于：
    接收所述网络设备发送的第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
  29. 根据权利要求28所述的终端设备，其特征在于，
    所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  30. 根据权利要求23所述的终端设备，其特征在于，所述接收器还用于：
    接收所述网络设备发送的第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
  31. 根据权利要求23所述的终端设备，其特征在于，所述接收器还用于：
    接收所述网络设备发送的第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数。
  32. 根据权利要求23所述的终端设备，其特征在于，所述接收器还用于：
    所述终端设备接收所述网络设备发送的第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
  33. 根据权利要求23-32中任一项所述的终端设备，其特征在于，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
  34. 一种网络设备，其特征在于，包括发送器、处理器以及接收器，其中：
    所述发送器，用于在所述处理器的控制下向终端设备发送第一信令；
    其中，所述第一信令用于配置M个用于承载链路恢复请求信号的资源，所述链路恢复请求信号用于在所述终端设备与所述网络设备之间的通信链路失败时恢复所述通信链路或重配新链路的信号，所述M个资源与N1个第一参考信号相关联，所述第一参考信号用于识别新链路；
    所述接收器，用于在所述处理器的控制下从P个用于承载链路恢复请求信号的资源中检测所述链路恢复请求信号；
    其中，所述M个资源包含所述P个资源，所述P个资源是所述网络设备根据所述N1个第一参考信号与N2个第二参考信号确定的资源和/或所述P个资源是所述网络设备根据所述N1第一参考信号与N3个第三参考信号确定的资源，所述第二参考信号用于检测链路失败，所述第三参考信号与物理下行控制信道PDCCH满足准共址QCL假设关系，M、N1，N2，N3，P为大于等于1的整数。
  35. 根据权利要求34所述的网络设备，其特征在于，所述P个资源与所述N1个第一参考信号中除目标参考信号外的参考信号相关联，其中所述目标参考信号为所述N2个第二参考信号中的至少一个参考信号和/或所述目标参考信号为所述N3个第三参考信号中的至少一个参考信号。
  36. 根据权利要求35所述的网络设备，其特征在于，所述发送器还用于：
    向所述终端设备发送第二信令，所述第二信令指示所述N3个第三参考信号，其中，所述N3个第三参考信号中的至少一个参考信号为所述目标参考信号。
  37. 根据权利要求36所述的网络设备，其特征在于，
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的所述目标参考信号检测链路失败；或
    所述第二信令用于指示所述终端设备使用所述N3个第三参考信号检测链路失败；或
    所述第二信令用于指示所述N2个第二参考信号的QCL信息。
  38. 根据权利要求36或37所述的网络设备，其特征在于，
    所述第二信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第二信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  39. 根据权利要求35所述的网络设备，其特征在于，所述发送器还用于：
    向所述终端设备发送第三信令，所述第三信令指示所述N2个第二参考信号，其中，所述N2个第二参考信号中的至少一个参考信号为所述目标参考信号。
  40. 根据权利要求39所述的网络设备，其特征在于，
    所述第三信令用于指示所述终端设备禁止使用所述目标参考信号识别新链路；或
    所述第三信令用于指示所述终端设备使用所述N1个第一参考信号中的除所述目标参考信号外的参考信号识别新链路。
  41. 根据权利要求34所述的网络设备，其特征在于，所述发送器还用于：
    向所述终端设备发送第四信令，所述第四信令指示K1个第一参考信号，其中，所述P个资源与所述K1个第一参考信号相关联，所述N1个第一参考信号包含所述K1个第一参考信号，所述K1为大于等于1且小于等于N1的整数。
  42. 根据权利要求34所述的网络设备，其特征在于，所述发送器还用于：
    向所述终端设备发送第五信令，所述第五信令指示K2个第一参考信号，其中，所述P个资源与所述N1个第一参考信号中除所述K2个第一参考信号外的至少一个第一参考信号相关联，所述N1个第一参考信号包含所述K2个第一参考信号，所述K2为大于等于1且小于等于N1的整数。
  43. 根据权利要求34所述的网络设备，其特征在于，所述发送器还用于：
    所述网络设备向所述终端设备发送第六信令，所述第六指令指示L个用于承载链路恢复请求信号的资源，其中，所述P个资源为所述M个资源中除所述L个资源外的资源或所述P个资源为所述L个资源。
  44. 根据权利要求34-43中任一项所述的网络设备，其特征在于，所述第一信令、所述第二信令、所述第三信令、所述第四信令、所述第五信令、所述第六信令分别为层一信令、层二信令以及层三信令中的至少一个信令。
  45. 一种计算机可读存储介质，其特征在于，所述介质上存储有指令，当其在计算机上运行时，使得计算机实现如权利要求1-11或12-22任一项所述的方法。
  46. 一种计算机程序产品，其特征在于，所述计算机程序产品包含有指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求1-11或12-22任一项所述的方法。
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