WO2022083518A1 - 无线通信方法与装置、终端和存储介质 - Google Patents

无线通信方法与装置、终端和存储介质 Download PDF

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Publication number
WO2022083518A1
WO2022083518A1 PCT/CN2021/124214 CN2021124214W WO2022083518A1 WO 2022083518 A1 WO2022083518 A1 WO 2022083518A1 CN 2021124214 W CN2021124214 W CN 2021124214W WO 2022083518 A1 WO2022083518 A1 WO 2022083518A1
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WIPO (PCT)
Prior art keywords
relay
cell
terminal
available
procedure
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PCT/CN2021/124214
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English (en)
French (fr)
Inventor
邓云
刘星
范伟
韩立锋
顾祥新
Original Assignee
展讯通信（上海）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 展讯通信（上海）有限公司 filed Critical 展讯通信（上海）有限公司
Priority to EP21881935.7A priority Critical patent/EP4236453A4/en
Priority to US18/250,157 priority patent/US20230397068A1/en
Publication of WO2022083518A1 publication Critical patent/WO2022083518A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/305—Handover due to radio link failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a wireless communication method and device, a terminal, and a storage medium.
  • the 3rd Generation Partnership Project (3GPP) introduces the relay (Relay) in the standard protocol. concept, and improve network coverage through relay to solve the problem of coverage blind spots.
  • RLF radio link failure
  • the embodiments of the present application provide a wireless communication method and device, a terminal, and a storage medium, so as to realize that the terminal can access a cell accessed by an available relay or access an appropriate cell, and reduce the delay in the process of restoring the RRC connection, It is ensured that the terminal recovers the RRC connection or data communication as soon as possible, and the probability of the terminal recovering the RRC connection is improved.
  • an embodiment of the present application provides a wireless communication method, including:
  • the terminal When the terminal detects a radio link failure or a handover failure, the terminal determines an available relay and/or a suitable cell;
  • the terminal performs a radio resource control RRC re-establishment or handover procedure through the available relay and/or the appropriate cell to access a first cell, where the first cell includes a cell accessed by the available relay. cell or the suitable cell.
  • RRC radio resource control
  • an embodiment of the present application provides a wireless communication apparatus, which is applied to a terminal; the apparatus includes a processing unit, and the processing unit is configured to:
  • the terminal When the terminal detects a radio link failure or a handover failure, determining an available relay and/or a suitable cell;
  • embodiments of the present application provide a terminal, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured by the The program is executed by the processor, and the program includes instructions for executing steps in any of the methods in the first aspect of the embodiments of the present application.
  • an embodiment of the present application provides a chip, including: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes as described in the first aspect of the embodiment of the present application some or all of the steps.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the implementation of the present application Examples include some or all of the steps described in the first aspect.
  • the embodiments of the present application provide a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps described in the first aspect of the embodiments of the present application.
  • the computer program may be a software installation package.
  • the terminal when the terminal detects a radio link failure or a handover failure, the terminal determines an available relay and/or a suitable cell; then, the terminal uses an available relay and/or a suitable cell The cell performs RRC re-establishment or handover procedure to access the first cell. Because when the terminal detects a radio link failure or handover failure, the terminal is likely to enter an idle state and cannot continue to carry out services because the terminal cannot find a suitable cell.
  • the RRC re-establishment or handover process can be performed in the cell that is used by the terminal, so that the terminal can access the cell accessed by the available relay or access the appropriate cell, reduce the delay in the process of restoring the RRC connection, and ensure that the terminal can restore the RRC connection or data communication as soon as possible. , improve the probability of the terminal to restore the RRC connection, and ensure that the terminal continues to carry out services.
  • FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of another wireless communication system provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of the architecture of another wireless communication system provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.
  • FIG. 5 is a block diagram of functional units of a wireless communication device provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • 5G 5th-Generation
  • wireless communication systems will not only support traditional wireless communication systems, but also support devices such as device to device (D2D) communication, machine to machine (M2M) communication, machine Type communication (machine type communication, MTC), inter-vehicle (vehicle to vehicle, V2V) communication or vehicle networking (vehicle to everything, V2X) communication, etc., so the technical solutions of the embodiments of the present application can also be applied to the above-mentioned wireless communication system.
  • D2D device to device
  • M2M machine to machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • V2X vehicle networking
  • the wireless communication system in the embodiments of the present application may be applied to beamforming (beamforming), carrier aggregation (carrier aggregation, CA), dual connectivity (dual connectivity, DC) or standalone (standalone, SA) deployment scenarios.
  • beamforming beamforming
  • carrier aggregation carrier aggregation
  • CA carrier aggregation
  • DC dual connectivity
  • SA standalone
  • the wireless communication system in this embodiment of the present application may be applied to an unlicensed spectrum.
  • unlicensed spectrum can also be considered as shared spectrum.
  • the wireless communication system in this embodiment may also be applied to licensed spectrum.
  • licensed spectrum can also be considered as non-shared spectrum.
  • the terminal may be a user equipment (user equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, an intelligent terminal, a wireless communication device, User Agent or User Device.
  • UE user equipment
  • an access terminal a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, an intelligent terminal, a wireless communication device, User Agent or User Device.
  • the terminal may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication function handheld devices, computing devices or other processing devices connected to wireless modems, relay devices, in-vehicle devices, wearable devices, terminals in next-generation communication systems such as NR networks or future evolution of public land mobile communication networks network, PLMN), etc., which are not specifically limited.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the terminal can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle; can be deployed on water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, industrial control ( Wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation security (transportation) wireless terminal equipment in safety), wireless terminal equipment in smart city (smart city) or wireless terminal equipment in smart home (smart home), etc.
  • a virtual reality virtual reality, VR
  • AR augmented reality
  • industrial control Wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation security (transportation) wireless terminal equipment in safety
  • wireless terminal equipment in smart city smart city
  • smart home smart home
  • the network device may be a device for communicating with a terminal, and the network device may be a base station (base transceiver station, BTS) in a GSM or CDMA communication system, a base station (nodeB, NB) in a WCDMA communication system, An evolved base station (evolutional node B, eNB or eNodeB) in an LTE communication system or a base station (gNB) in an NR communication system.
  • the network device may also be an access point (access point, AP) in a wireless local area network (WLAN), a relay station, a network device in a future evolved PLMN network, or a network device in an NTN network, and the like.
  • the gNB may include a centralized unit (centralized unit, CU) and a DU, and the gNB may also include an active antenna unit (active antenna unit, AAU).
  • the CU can implement some functions of the gNB
  • the DU can implement some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) layer and the packet data convergence protocol (PDCP) layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, medium access control (MAC) layer, and physical (PHY) layer.
  • RLC radio link control
  • MAC medium access control
  • PHY physical
  • the AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, therefore, under this architecture, the higher-layer signaling (such as the RRC layer signaling) can be considered to be sent by the DU. , or sent by DU+AAU.
  • the network device may include one or more devices of a CU node, a DU node, and an AAU node.
  • the CU may be divided into network devices in an access network (radio access network, RAN), and the CU may also be divided into network devices in a core network (core network, CN), which is not specifically limited.
  • the network device may have mobile characteristics, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) ) satellite etc.
  • the network device may also be a base station set in a location such as land or water.
  • the network device can provide services for the cell, and the terminals in the cell can communicate with the network device through transmission resources (eg, spectrum resources).
  • the cells may include small cells (small cells), urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells), and the like.
  • the wireless communication system 10 may include a network device 110 and a terminal 120 , and the network device 110 may be a device that performs communication with the terminal 120 . At the same time, the network device 110 may provide communication coverage for a specific geographic area, and may communicate with the terminals 120 located within the coverage area.
  • the wireless communication system 10 may further include multiple network devices, and the coverage of each network device may include other numbers of terminals, which are not specifically limited herein.
  • the wireless communication system 10 may further include other network entities such as a network controller, a mobility management entity, etc., which are not specifically limited herein.
  • network entities such as a network controller, a mobility management entity, etc., which are not specifically limited herein.
  • the communication between the network device and the terminal in the wireless communication system 10 and the communication between the terminal and the terminal may be wireless communication or wired communication, which is not specifically limited herein.
  • a terminal within the communication coverage of a network device can receive system messages and paging messages.
  • the terminal can initiate a random access procedure to establish a radio resource control (RRC) connection, and then after completing the security activation, establish a data radio bearer and start transmitting service data.
  • RRC radio resource control
  • 3GPP introduces the concept of relay (Relay) in the standard protocol, and improves network coverage through relay to solve the problem of coverage blind spots.
  • the terminal 210 (or referred to as a remote UE) is outside the coverage of the network device 230, so the terminal 210 accesses through the relay 220 (or referred to as a Relay UE) within the coverage of the network device 230
  • the internet The relay 220 can be regarded as a terminal with a relay function, the relay 220 communicates with the terminal 210 using a PC5 interface, and the cell corresponding to the network device 230 is used as the serving cell of the terminal 210 .
  • the relay 220 and the serving cell adopt the existing communication mechanism between the terminal and the serving cell, and the relay 220 and the terminal 210 can exchange data and signaling through the direct communication mechanism.
  • the relay 220 can forward the signaling and data sent by the network device 230 to the terminal 210 to the terminal 210 ;
  • FIG. 3 illustrates that the relay 320 moves from the serving cell to the target cell, and the relay 320 still continues to serve the terminal 310 .
  • the network device corresponding to the serving cell is the network device 330
  • the network device corresponding to the target cell is the network device 340 .
  • Scenario 1 The terminal (or remote UE) is in the connected state in the serving cell first. Since the signal in the serving cell is too poor, the terminal detects whether there is an available relay. If there is an available relay, the serving cell can switch the terminal to the available relay, and the available relay can serve the terminal;
  • Scenario 2 The terminal is first in the connected state in the serving cell, and the serving cell configures one or more candidate relays for the terminal and corresponding handover execution conditions. Then, when the terminal determines a candidate relay that satisfies the handover execution condition from the one or more candidate relays, the terminal switches to the candidate relay.
  • Scenario 3 The terminal is in the connected state in the serving cell, and the terminal has established communication with the network device corresponding to the serving cell through the relay, and the service can be carried out smoothly. At this time, the terminal needs to switch from the relay to a new relay, or switch from the relay to the serving cell.
  • the terminal may detect a handover failure or a radio link failure (RLF), if the terminal adopts the processing mechanism specified by the current communication protocol. For example, the terminal performs cell selection, and if there is a suitable cell (suitable cell), the terminal initiates an RRC reestablishment request (RRCReestablishmentRequest) to perform the reestablishment process; if there is no suitable cell, the terminal enters an idle state. Because the terminal cannot easily find a suitable cell, the terminal enters an idle state, so that the terminal cannot continue to carry out services, which affects the user experience.
  • RLF radio link failure
  • an embodiment of the present application provides a schematic flowchart of a wireless communication method, please refer to FIG. 4 .
  • the wireless communication method may be applied to the wireless communication system of the embodiment of the present application. The method includes:
  • the terminal determines an available relay and/or a suitable cell.
  • the terminal in this embodiment of the present application may be in a connected state (RRC_CONNETED) in a serving cell or be in a connected state through a relay access network.
  • the situation in which the terminal detects a radio link failure or a handover failure in this embodiment of the present application may be specifically as a handover failure or a radio link failure in each handover process in the above "scenario 1", “scenario 2" or “scenario 3" fail. That is to say, the terminal may have a wireless link failure in the process of detecting whether there is an available relay, or may be in the process of judging whether there is a candidate relay that satisfies the handover execution condition in at least one candidate relay configured by the network.
  • the terminal may fail in the process of switching from the serving cell to the detected and available relay, or the terminal may fail in the process of switching from the terminal to the configured candidate relay, It may be a handover failure in the process of handover by the terminal from the relay to the new relay, or it may be a handover failure in the process of handover by the terminal from the relay to the serving cell, which is not specifically limited.
  • the terminal determines available relays and/or suitable cells, it can be understood that the terminal can determine only available relays, only suitable cells, or both available relays. Relays and suitable cells, which are not specifically limited.
  • the following embodiments of the present application will specifically describe how the terminal determines an available relay and/or a suitable cell.
  • the terminal determines an available relay and/or a suitable cell, which may include the following operations: the terminal performs a relay discovery procedure and/or a relay detection procedure to determine an available relay; and/or, the terminal An available relay is determined from at least one candidate relay configured by the network; and/or, the terminal performs a cell selection procedure to determine a suitable cell; and/or, the terminal performs a cell selection procedure to determine an appropriate cell, and based on the suitable cell
  • the cell's system messages determine the available relays.
  • the at least one candidate relay configured by the network may be configured by the network to the terminal through signaling before the terminal detects a radio link failure or a handover failure.
  • the network may be a network device corresponding to the serving cell, etc.; or, the network may be other devices in the wireless communication system, which is not specifically limited.
  • the terminal may perform a relay discovery process and/or a relay detection process, obtain at least one candidate relay configured by the network, and The cell selection procedure is executed, and the system information of the appropriate cell may also be acquired in the execution of the cell selection procedure to determine the appropriate cell.
  • the specific processes or operations that the terminal needs to perform will be described below with reference to various situations.
  • the terminal does not perform the cell selection process.
  • the terminal may not need to perform a cell selection procedure.
  • the terminal can directly perform the RRC reestablishment or handover procedure through the available relay to access the cell accessed by the available relay, thereby ensuring that the terminal can continue to perform services.
  • this method can ensure that the terminal can resume RRC connection or data communication as soon as possible, and reduce the large delay that may be introduced due to cell selection.
  • the terminal when the terminal performs the relay discovery process and/or the relay detection process, if no available relay is found, the terminal performs the cell selection process again.
  • the terminal in the process of how to determine an available relay and/or a suitable cell, if the terminal does not find an available relay by performing the relay discovery procedure and/or the relay detection procedure, the terminal needs to execute the cell again. Choose a process. In addition, during the execution of the relay discovery process and/or the relay detection process, due to time constraints and other reasons, the terminal does not find an available relay within the preset time, so the terminal performs the cell selection process, thereby avoiding long-term detection. Relaying prevents the terminal from being able to quickly restore the connection, which affects the user experience.
  • the relay discovery process and/or the relay detection process and the cell selection process are performed by the terminal in parallel or simultaneously.
  • the terminal may execute the relay discovery procedure and/or the relay detection procedure and the cell selection procedure in parallel or at the same time.
  • the relay discovery process and/or the relay detection process are preferentially executed by the terminal; or, the cell selection process is preferentially executed by the terminal.
  • whether the terminal preferentially executes the relay discovery process and/or the relay detection process, or the preferential cell selection process may be determined through a specific handover scenario.
  • scenario 1 when the signal from the serving cell to the terminal is degraded, that is, when the terminal measures that the signal quality of the serving cell is very poor, and there are no other neighbor cells that can be handed over, the terminal is most likely to perform execution through an available relay.
  • the terminal can preferentially perform the relay discovery process and/or the relay detection process; in “scenario 3", when the terminal needs to switch from a relay to a new relay, the terminal can preferentially perform the relay discovery process and/or relay detection process.
  • the terminal when the terminal needs to switch from the relay to the serving cell, the terminal can preferentially execute the cell selection process.
  • the terminal preferentially performs the relay discovery and/or relay detection procedure, or preferentially performs the cell selection procedure, is limited by time. For example, within a preset time, the terminal preferentially executes a certain process, and if no available relay or suitable cell is found within the preset time, another process is executed.
  • the terminal when the terminal performs the cell selection process, if no suitable cell is found, the terminal then performs the relay discovery process and/or the relay detection process.
  • the relay discovery process may include the following steps: the terminal receives first information, where the first information is used to indicate that there is at least one relay that provides a relay service.
  • the implementation of this application considers that relays that can provide relay services broadcast the first information that they have relay services to the surrounding area. At this time, the terminal learns at least one relay that provides the relay service by receiving the first information.
  • the relay discovery process may include the following steps: the terminal sends a relay request message; the terminal receives second information in response to the relay request message, where the second information is used to indicate at least one relay that provides relay services.
  • the implementation of this application considers that the terminal broadcasts or sends a relay request message to the surroundings. If a relay receives the relay request message, and the relay is willing to provide a relay service to the terminal, the relay sends second information in response to the relay request message to the terminal. Finally, by receiving the second information, the terminal may learn that there is at least one relay that provides a relay service.
  • the relay detection process will be specifically described below in the implementation of the present application.
  • the relay detection process may include the following steps: the terminal acquires a signal sent by at least one relay; and the terminal determines whether the signal sent by the at least one relay meets a first preset condition. It should be noted that, in this embodiment of the present application, at least one relay may be determined first through a relay discovery process, and then, through a relay detection process, it may be determined whether there is a relay that satisfies the first preset condition in the at least one relay, so as to realize the The relays that satisfy the first preset condition are regarded as available relays.
  • the signal sent by the at least one relay may include at least one of the following: a synchronization signal and a demodulation reference signal (demodulation reference signal, DMRS).
  • a synchronization signal and a demodulation reference signal (demodulation reference signal, DMRS).
  • DMRS demodulation reference signal
  • the first preset condition may include: when the terminal detects or measures the quality of the signal sent by at least one relay (that is, the terminal detects or measures the signal sent by the relay, and evaluates the quality of the signal), the signal sent by the at least one relay is The quality exceeds the preset threshold.
  • the quality of the signal sent by at least one relay can be determined by reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), or signal to interference plus noise ratio (signal to interference plus noise). ratio, SINR), etc.
  • RSRP reference signal receiving power
  • RSRQ reference signal receiving quality
  • SINR signal to interference plus noise ratio
  • the first preset condition may be specified by a standard protocol, may be configured by the network, or may be pre-configured.
  • the terminal performs the relay discovery process and/or the relay detection process to determine the available relays, which may include the following operations: the terminal performs the relay discovery process to determine at least one relay; The terminal performs a relay detection process, and uses a relay that meets the first preset condition in at least one relay as an available relay.
  • the terminal needs to detect whether the signal of the at least one relay satisfies the first preset condition. Wherein, the terminal detects whether the signal quality of the at least one relay exceeds a preset threshold, and regards the relay exceeding the preset threshold as an available relay.
  • the terminal can perform RRC re-establishment through the available relay, so that the terminal can access the available relay. cell, to ensure that the terminal can resume RRC connection or data communication as soon as possible, and to ensure that the terminal can continue to carry out services.
  • performing RRC re-establishment through the relay may be that the terminal sends an RRC re-establishment request to the relay, and then the relay forwards the re-establishment request to the cell to which it is accessed. If the cell allows the re-establishment request of the terminal, an RRC re-establishment message is returned to the relay, so that the terminal can resume signaling interaction with the network through the re-establishment message.
  • the above process of determining available relays is divided into a relay discovery process and a relay detection process.
  • these two processes can also be collectively referred to as a relay discovery process or a relay search process.
  • the above relay discovery process and relay detection process can be performed simultaneously.
  • the terminal receives the first information sent by the relay, the first information includes a demodulation reference signal, and the terminal can evaluate whether the received demodulation reference signal satisfies the first preset condition.
  • the available relays satisfy one of the following methods: the available relays are the relays that satisfy the first preset condition A random relay in , the available relay is the relay with the strongest RSRP among the relays that satisfy the first preset condition.
  • the terminal can randomly select one relay from the at least two relays as an available relay, The relay with the strongest RSRP may also be selected from the at least two relays as the available relay, thereby improving the flexibility of the wireless communication system.
  • the network device corresponding to the serving cell may The terminal is notified to perform a relay detection process, and an available relay is reported to it, so that the network device corresponding to the serving cell can switch the terminal to the available relay.
  • the serving cell needs to firstly communicate with the cell (which may be a neighboring cell or the serving cell accessed by the terminal) accessed by the available relay, and negotiate the resource allocation of the terminal; secondly, the available relay
  • the accessed cell returns the allocated resources to the network device corresponding to the serving cell; then, the network device corresponding to the serving cell sends a handover command to the terminal; wherein the handover command includes that the cell accessed by the available relay is the terminal information such as allocated resources; finally, after receiving the handover command, the terminal switches to the available relay.
  • the following embodiments of the present application will specifically describe how the terminal determines an available relay from at least one candidate relay configured in the network.
  • the terminal determines an available relay from at least one candidate relay configured by the network, which may include the following operations: the terminal acquires the at least one candidate relay configured by the network and the handover execution condition; Among the relays, candidate relays that satisfy the handover execution condition or the second preset condition are regarded as available relays.
  • the network device corresponding to the serving cell will pre-configure at least one candidate relay and corresponding handover execution conditions for the terminal, and the network device has already connected with the cell (and the candidate relay) to which the at least one candidate relay is accessed. ) to negotiate in advance relevant information such as resource allocation.
  • the terminal determines an available relay from the at least one candidate relay, the terminal can directly switch to the available relay, thereby realizing access to the cell accessed by the available relay.
  • the manner in which the network configures at least one candidate relay and the corresponding handover execution conditions is beneficial to improve the RRC recovery efficiency, and Ensure that the terminal resumes data communication as soon as possible.
  • the second preset condition may include: when the terminal detects the quality of the signal sent by the at least one candidate relay (that is, the terminal detects the signal sent by the candidate relay and evaluates the signal quality), the quality of the signal sent by the at least one candidate relay exceeds preset threshold.
  • the cell selection process may include the following steps: the terminal scans the supported frequency points to find a suitable cell with the strongest RSRP on the frequency point.
  • the terminal performs cell selection, and the terminal finds that at least one cell satisfies the cell selection condition.
  • the condition of cell selection may be the S criterion specified in the standard protocol TS38.304.
  • the S criterion is that the signal of the cell satisfies the preset conditions, and on the frequency point where the cell is located, the RSRP of the cell measured by the terminal is the strongest.
  • the signal of the cell may include a synchronization signal.
  • the terminal performs a cell selection process to determine a suitable cell, which may include the following operations: the terminal scans one or more supported frequencies; the terminal measures suitable cells on the supported frequencies and the appropriate cell corresponding to the strongest RSRP on the frequency point is used as the target cell for cell selection.
  • the terminal can perform RRC re-establishment through the suitable cell, so that the terminal can access the suitable cell, ensure that the terminal can restore the RRC connection or data communication as soon as possible, and ensure that The terminal can continue to conduct business.
  • the present application will specifically describe how the terminal performs the cell selection procedure to determine the appropriate cell, and determines the available relay according to the system message of the appropriate cell.
  • the terminal performs a cell selection procedure to determine an appropriate cell, and determines an available relay according to a system message of the appropriate cell, which may include the following operations: the terminal scans one or more supported frequencies; the terminal Measure the RSRP of the cell on the supported frequency point, and use the suitable cell with the strongest RSRP on the frequency point as the target cell for cell selection; the terminal obtains the system message of the suitable cell (ie, the target cell); The relay; wherein, the system message carries the configuration information supporting relay access.
  • the terminal may obtain configuration information supporting relay access through configuration information in a system message of a suitable cell.
  • the terminal can perform relay discovery and/or relay detection procedures to discover at least one available relay that accesses the cell, and then select one of the relays to perform RRC re-establishment, so as to achieve access to the available relay.
  • the access cell ensures that the terminal can resume the RRC connection or data communication as soon as possible, and ensure that the terminal can continue to carry out services.
  • the terminal may perform RRC re-establishment through the appropriate cell.
  • the available relays in this embodiment of the present application may include available relays determined by the relay discovery process and/or relay detection process, available relays determined by at least one candidate relay configured by the network
  • the available relays are determined by the system message of the appropriate cell. Therefore, when the above-mentioned situations exist at the same time, the embodiment of the present application may use the relay corresponding to the strongest RSRP as the available relay.
  • the terminal may detect a handover failure during the process of handover to the configured candidate relay. Therefore, in this case, in the following embodiments of the present application, how the terminal determines an available relay and/or a suitable cell is described as an example.
  • the terminal determining an available relay and/or a suitable cell may include the following operations: the terminal determines an available relay from the at least one candidate relay configured by the network and other relays except the first candidate relay; and/or, The terminal performs a relay discovery procedure and/or a relay detection procedure to determine available relays; and/or, the terminal performs a cell selection procedure to determine a suitable cell; and/or, the terminal performs a cell selection procedure to determine an appropriate cell, And the available relay is determined according to the system message of the appropriate cell.
  • the terminal performs a radio resource control RRC re-establishment or handover procedure through the available relay and/or the appropriate cell to access the first cell.
  • the first cell may include a cell accessed by the available relay or the appropriate cell.
  • the terminal may determine only available relays, may only determine suitable cells, or may determine both available relays and suitable cells.
  • the terminal can directly access the available relay through the handover process, and then access the cell to which the relay is accessed. That is, the first district.
  • the terminal needs to access the cell accessed by the available relay through the RRC re-establishment procedure, or to access the appropriate cell through the RRC re-establishment procedure.
  • the terminal can determine whether to access the available relays (and then use the RSRP of the available relays and the RSRP of the suitable cells to access the available relays).
  • the relay accesses the cell accessed by the relay) or accesses the appropriate cell.
  • the terminal performs a radio resource control RRC reestablishment or handover procedure through an available relay and/or a suitable cell to access the first cell, which may include the following operations: if the terminal determines that an available relay and a suitable cell are available The terminal obtains the RSRP of the available relay and the RSRP of the appropriate cell; the terminal determines the relay or cell corresponding to the strongest RSRP among the RSRP of the available relay and the RSRP of the appropriate cell; The relay or cell corresponding to the RSRP performs an RRC reestablishment or handover procedure to access the first cell.
  • RRC reestablishment or handover procedure through an available relay and/or a suitable cell to access the first cell, which may include the following operations: if the terminal determines that an available relay and a suitable cell are available The terminal obtains the RSRP of the available relay and the RSRP of the appropriate cell; the terminal determines the relay or cell corresponding to the strongest RSRP among the RSRP of the available relay and
  • the terminal may sort the RSRPs of the available relays and the RSRPs of the suitable cells, and select the strongest RSRP. If the strongest RSRP is an available relay, the terminal performs RRC re-establishment or handover procedure through the available relay to access the cell accessed by the available relay; if the strongest RSRP is a suitable cell, then The terminal performs an RRC re-establishment or handover procedure through the appropriate cell to access the appropriate cell.
  • a corresponding offset may be added to the RSRP of the available relay and the RSRP of the appropriate cell.
  • the offsets can be different.
  • the RSRP of the available relay can be expressed as RSRP(Relay)+offset_1 after adding the corresponding offset
  • the RSRP of the appropriate cell can be expressed as RSRP(Cell)+offset_2 after adding the corresponding offset, and then use The result of the additional offset is compared.
  • the offset may be specified by a standard protocol, may be configured by the network, or may be pre-configured.
  • the offset can take a positive value, a negative value, or 0.
  • the terminal performs radio resource control RRC re-establishment or handover procedure through an available relay and/or a suitable cell to access the first cell, which may include the following operations: the terminal preferentially performs the handover procedure through an available relay to access the first cell; or, the terminal preferentially performs RRC re-establishment through an available relay to access the first cell; alternatively, the terminal preferentially performs RRC re-establishment through a suitable cell to access the first cell; or, the terminal performs RRC re-establishment through an available relay
  • the RSRP of the relay and the relay or cell corresponding to the strongest RSRP among the RSRPs of the appropriate cell perform RRC re-establishment or handover procedure to access the first cell.
  • the embodiment of the present application considers the policy to be executed preferentially (such as preferentially The relay performs RRC reconstruction) or determines the strategy of the strongest RSRP, thereby helping to improve the flexibility of the entire wireless communication system.
  • the terminal restores the RRC connection or data communication as soon as possible, reduces the delay in the process of restoring the RRC connection, and improves the probability of the terminal restoring the RRC connection.
  • the available relay can be one candidate relay among the at least one candidate relay configured by the network, before S420, the terminal can perform handover through the corresponding configuration of the candidate relay, and the specific description is as follows:
  • the terminal before the terminal performs RRC re-establishment or handover procedure through an available relay and/or a suitable cell to access the first cell, the following operations are further included: if the available relay is the second candidate relay, the terminal performs handover through the corresponding configuration of the second candidate relay to access the second candidate relay; wherein the second candidate relay is one of at least one candidate relay configured by the network.
  • the terminal performs the radio resource control RRC reestablishment or handover procedure to access the first cell through an available relay and/or an appropriate cell, the following operations are also included: if the terminal is in the process of handing over to the second candidate relay If it fails, the terminal determines available relays from other relays except the second candidate relay among the at least one candidate relay.
  • the terminal when the terminal detects a radio link failure or a handover failure, the terminal determines an available relay and/or a suitable cell; then, the terminal uses an available relay and/or a suitable cell The cell performs RRC re-establishment or handover procedure to access the first cell. Because when the terminal detects a radio link failure or handover failure, the terminal is likely to enter an idle state and cannot continue to carry out services because the terminal cannot find a suitable cell.
  • the RRC re-establishment or handover process can be performed in the cell that is used by the terminal, so that the terminal can access the cell accessed by the available relay or access the appropriate cell, reduce the delay in the process of restoring the RRC connection, and ensure that the terminal can restore the RRC connection or data communication as soon as possible. , improve the probability of the terminal to restore the RRC connection, and ensure that the terminal continues to carry out services.
  • the terminal includes corresponding hardware structures and/or software modules for executing each function.
  • the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software-driven hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the terminal may be divided into functional units according to the foregoing method example.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above-mentioned integrated units can be implemented in the form of hardware, and can also be implemented in the form of software program modules. It should be noted that, the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division manners in actual implementation.
  • FIG. 5 provides a block diagram of functional units of a wireless communication device.
  • the wireless communication apparatus 500 is applied to a terminal, and specifically includes: a processing unit 502 and a communication unit 503 .
  • the processing unit 502 is used to control and manage the actions of the terminal.
  • the processing unit 502 is used to support the terminal to perform some steps in FIG. 4 and other processes for the technical solutions described in this application.
  • the communication unit 503 is used to support communication between the terminal and other devices in the wireless communication system.
  • the wireless communication apparatus 500 may further include a storage unit 501 for storing program codes and data of the terminal.
  • the processing unit 502 may be a processor or a controller, such as a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), or an application-specific integrated circuit (application-specific integrated circuit). integrated circuit, ASIC), field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure.
  • the processing unit 502 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 503 may be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 501 may be a memory.
  • the processing unit 502 is a processor
  • the communication unit 503 is a communication interface
  • the storage unit 501 is a memory
  • the wireless communication apparatus 500 involved in this embodiment of the present application may be the terminal shown in FIG. 6 .
  • the processing unit 502 is configured to perform any step performed by the terminal in the above method embodiments, and when performing data transmission such as sending, the communication unit 503 can be selectively invoked to complete corresponding operations. A detailed description will be given below.
  • the processing unit 502 is configured to: determine an available relay and/or a suitable cell when the terminal detects a radio link failure or a handover failure; perform radio resource control RRC re-establishment or handover through the available relay and/or a suitable cell
  • the process is to access a first cell, where the first cell includes a cell accessed by an available relay or a suitable cell.
  • the terminal when the terminal detects a radio link failure or a handover failure, the terminal determines an available relay and/or a suitable cell; then, through an available relay and/or a suitable cell An RRC re-establishment or handover procedure is performed to access the first cell. Because when the terminal detects a radio link failure or handover failure, the terminal is likely to enter an idle state and cannot continue to carry out services because the terminal cannot find a suitable cell.
  • the RRC re-establishment or handover process can be performed in the cell that is used by the terminal, so that the terminal can access the cell accessed by the available relay or access the appropriate cell, reduce the delay in the process of restoring the RRC connection, and ensure that the terminal can restore the RRC connection or data communication as soon as possible. , improve the probability of the terminal to restore the RRC connection, and ensure that the terminal continues to carry out services.
  • the processing unit 502 executes a relay discovery procedure and/or a relay detection procedure to determine the available relay; and/or, Determine the available relay from at least one candidate relay configured by the network; and/or perform a cell selection procedure to determine the suitable cell; and/or perform the cell selection procedure to determine the suitable cell cell, and determine the available relay according to the system message of the appropriate cell.
  • the relay discovery process includes the following steps: receiving first information, where the first information is used to indicate that there is at least one relay that provides relay services; or, the relay discovery process includes: The following steps are: sending a relay request message; and receiving second information in response to the relay request message, where the second information is used to indicate that there is at least one relay that provides relay services.
  • the relay detection process includes the following steps: acquiring a signal sent by the at least one relay; and judging whether the signal sent by the at least one relay satisfies a first preset condition.
  • the signal sent by the at least one relay includes at least one of the following: a synchronization signal and a demodulation reference signal.
  • the first preset condition includes: when the quality of the signal sent by the at least one relay is detected, the quality of the signal sent by the at least one relay exceeds a preset threshold.
  • the processing unit 502 is specifically configured to: perform the relay discovery process to determine the at least one relay Relay; execute the relay detection process, and use the relay that satisfies the first preset condition in the at least one relay as the available relay.
  • the available relays satisfy one of the following manners: the available relays The relay is a random one of the relays that meet the first preset condition, and the available relay is that the reference signal received power RSRP is the highest among the relays that meet the first preset condition. A strong relay.
  • the processing unit 502 is specifically configured to: obtain the at least one candidate relay configured by the network and handover Execution condition: taking a candidate relay that satisfies the handover execution condition or the second preset condition among the at least one candidate relay as the available relay.
  • the second preset condition includes: when the signal quality sent by the at least one candidate relay is detected, the signal quality sent by the at least one candidate relay exceeds a preset threshold.
  • the cell selection procedure is not performed.
  • the cell selection process is performed again.
  • the relay discovery process and/or the relay detection process and the cell selection process are performed in parallel or simultaneously.
  • the relay discovery process and/or the relay detection process are preferentially executed by the terminal; or, the cell selection process is preferentially executed by the terminal.
  • the relay discovery process and/or the relay detection process are performed again.
  • the processing unit 502 is specifically configured to: remove the first candidate relay from the at least one candidate relay configured by the network determine the available relays from other relays that follow; and/or, perform the relay discovery process and/or the relay detection process to determine the available relays; and/or, perform the a cell selection procedure to determine the appropriate cell; and/or, performing the cell selection procedure to determine the appropriate cell, and determining the available relay according to a system message of the appropriate cell.
  • the processing unit 502 is specifically configured to: if it is determined that For the available relay and the appropriate cell, obtain the RSRP of the available relay and the RSRP of the appropriate cell; determine the RSRP of the available relay and the RSRP of the appropriate cell The relay or cell corresponding to the strongest RSRP; according to the relay or cell corresponding to the strongest RSRP, perform the RRC reestablishment or the handover procedure to access the first cell.
  • the RSRP for the available relay and/or the RSRP of the suitable cell is A corresponding offset is added to the RSRP of the cell.
  • the processing unit 502 is specifically configured to: preferentially use the available relay and/or the appropriate cell
  • the available relay performs the handover procedure to access the first cell; or, preferentially performs the RRC re-establishment through the available relay to access the first cell; or, preferentially uses the available relay
  • a suitable cell performs the RRC re-establishment to access the first cell; or, the RSRP of the available relay and the relay or cell corresponding to the strongest RSRP among the RSRPs of the suitable cell perform the RRC re-establishment RRC re-establishment or the handover procedure to access the first cell.
  • the processing unit 502 before performing RRC re-establishment or handover procedure through the available relay and/or the appropriate cell to access the first cell, is further configured to: if the If the available relay is the second candidate relay, perform handover through the corresponding configuration of the second candidate relay to access the second candidate relay; wherein the second candidate relay is the network configuration one of the at least one candidate relay of .
  • the processing unit 502 before performing the RRC reestablishment or handover procedure through the available relay and/or the appropriate cell to access the first cell, is further configured to: If it fails in the second candidate relay process, the available relay is determined from other relays except the second candidate relay in the at least one candidate relay.
  • FIG. 6 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • the terminal 600 includes a processor 610 , a memory 620 , a communication interface 630 and at least one communication bus for connecting the processor 610 , the memory 620 , and the communication interface 630 .
  • the memory 620 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (PROM) or portable Read-only memory (compact disc read-only memory, CD-ROM), the memory 620 is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • PROM erasable programmable read-only memory
  • CD-ROM portable Read-only memory
  • Communication interface 630 is used to receive and transmit data.
  • the processor 610 may be one or more CPUs, and if the processor 610 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.
  • the processor 610 in the terminal 600 is configured to read one or more programs 621 stored in the memory 620, and perform the following operations: when the terminal detects a wireless link failure or a handover failure, determine the available relays and/or suitable relays. Cell; perform RRC re-establishment or handover procedure through an available relay and/or an appropriate cell to access a first cell, where the first cell includes a cell accessed by an available relay or an appropriate cell.
  • the terminal when the terminal detects a radio link failure or a handover failure, it determines an available relay and/or a suitable cell; then, the RRC re-establishment or handover procedure is performed through the available relay and/or a suitable cell to access the first district. Because when the terminal detects a radio link failure or handover failure, the terminal is likely to enter an idle state and cannot continue to carry out services because the terminal cannot find a suitable cell.
  • the RRC re-establishment or handover process can be performed in the cell that is used by the terminal, so that the terminal can access the cell accessed by the available relay or access the appropriate cell, reduce the delay in the process of restoring the RRC connection, and ensure that the terminal can restore the RRC connection or data communication as soon as possible. , improve the probability of the terminal to restore the RRC connection, and ensure that the terminal continues to carry out services.
  • each operation may adopt the corresponding description of the method embodiment shown in FIG. 4 above, and the terminal 600 may be used to execute the terminal-side method of the above method embodiment of the present application, which will not be described in detail here.
  • An embodiment of the present application further provides a chip, wherein the chip includes a processor, configured to call and run a computer program from a memory, so that the device installed with the chip executes the execution of the terminal or the management device in the above method embodiment. some or all of the steps described.
  • Embodiments of the present application further provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the terminal as described in the foregoing method embodiments Or some or all of the steps described in Manage Devices.
  • Embodiments of the present application further provide a computer program product, wherein the computer program product includes a computer program, and the computer program is operable to cause the computer to execute part or all of the description of the terminal or the management device in the foregoing method embodiments step.
  • the computer program product may be a software installation package.
  • the steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (erasable programmable read-only memory, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM), or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the ASIC may be located in a terminal or management device.
  • the processor and the storage medium may also exist in the terminal or management device as discrete components.
  • the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted via wireline (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) means from a website site, computer, server, or data center.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, digital video disc (DVD)), or semiconductor media (eg, solid state disk (SSD)) Wait.

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Abstract

本申请实施例公开了一种无线通信方法与装置、终端和存储介质，该方法包括：在终端探测到无线链路失败或者切换失败时，终端确定可用的中继和/或合适的小区；终端通过该可用的中继和/或该合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，该第一小区包括该可用的中继所接入的小区或者该合适的小区。可见，本申请实施例通过可用的中继和/或合适的小区来执行RRC重建或者切换流程，从而实现终端接入可用的中继所接入的小区或者接入合适的小区，减少恢复RRC连接过程中的时延，保证终端尽快恢复RRC连接或数据通信，提升终端恢复RRC连接的几率，以及确保终端继续开展业务。

Description

无线通信方法与装置、终端和存储介质 技术领域
本申请涉及通信技术领域，尤其涉及一种无线通信方法与装置、终端和存储介质。
背景技术
由于实际的网络部署总会存在覆盖盲点，导致处于覆盖盲点的终端无法与网络设备进行通信，因此第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)在标准协议中引入中继(Relay)的概念，并通过中继来提升网络覆盖以解决覆盖盲点的问题。
然而，在实际基于中继的通信过程中，通信过程常常发生切换失败或者无线链路失败(radio link failure，RLF)等问题。此时，终端需要恢复无线资源控制(radio resource control，RRC)连接以避免无法继续开展业务而影响用户体验。
发明内容
本申请实施例提供一种无线通信方法与装置、终端和存储介质，以期望实现终端接入可用的中继所接入的小区或者接入合适的小区，减少恢复RRC连接过程中的时延，保证终端尽快恢复RRC连接或数据通信，提升终端恢复RRC连接的几率。
第一方面，本申请实施例提供一种无线通信方法，包括：
在终端探测到无线链路失败或者切换失败时，所终端确定可用的中继和/或合适的小区；
所述终端通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，所述第一小区包括所述可用的中继所接入的小区或者所述合适的小区。
第二方面，本申请实施例提供一种无线通信装置，应用于终端；所述装置包括处理单元，所述处理单元用于：
在所述终端探测到无线链路失败或者切换失败时，确定可用的中继和/或合适的小区；
通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，所述第一小区包括所述可用的中继所接入的小区或者所述合适的小区。
第三方面，本申请实施例提供一种终端，包括处理器、存储器、通信接口以及一个或多个程序，其中，所述一个或多个程序被存储在所述存储器中， 并且被配置由所述处理器执行，所述程序包括用于执行本申请实施例第一方面任一方法中的步骤的指令。
第四方面，本申请实施例提供了一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如本申请实施例第一方面中所描述的部分或全部步骤。
第五方面，本申请实施例提供了一种计算机可读存储介质，其中，所述计算机可读存储介质存储用于电子数据交换的计算机程序，其中，所述计算机程序使得计算机执行如本申请实施例第一方面中所描述的部分或全部步骤。
第六方面，本申请实施例提供了一种计算机程序，其中，所述计算机程序可操作来使计算机执行如本申请实施例第一方面中所描述的部分或全部步骤。该计算机程序可以为一个软件安装包。
可以看出，本申请实施例中，在终端探测到无线链路失败或者切换失败时，终端通过确定可用的中继和/或合适的小区；然后，终端通过可用的中继和/或合适的小区执行RRC重建或者切换流程以接入第一小区。由于在终端探测到无线链路失败或者切换失败时，终端很容易因为发现不到合适的小区，而导致终端进入空闲态，以及无法继续开展业务，因此本申请通过可用的中继和/或合适的小区来执行RRC重建或者切换流程，从而实现终端接入可用的中继所接入的小区或者接入合适的小区，减少恢复RRC连接过程中的时延，保证终端尽快恢复RRC连接或数据通信，提升终端恢复RRC连接的几率，以及确保终端继续开展业务。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种无线通信系统的架构示意图；
图2是本申请实施例提供的又一种无线通信系统的架构示意图；
图3是本申请实施例提供的又一种无线通信系统的架构示意图；
图4是本申请实施例提供的一种无线通信方法的流程示意图；
图5是本申请实施例提供的一种无线通信装置的功能单元组成框图；
图6是本申请实施例提供的一种终端的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。 针对本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种无线通信系统，例如：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、新无线(New Radio，NR)系统、NR系统的演进系统、非授权频谱上的LTE(LTE-based Access to Unlicensed Spectrum，LTE-U)系统、非授权频谱上的NR(NR-based Access to Unlicensed Spectrum，NR-U)系统、非地面通信网络(Non-Terrestrial Networks，NTN)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、第五代通信(5th-Generation，5G)系统或其他通信系统等。
通常来说，传统的无线通信系统支持的连接数有限，且易于实现。然而，随着通信技术的发展，无线通信系统不仅将支持传统的无线通信系统，还将支持如设备到设备(device to device，D2D)通信、机器到机器(machine to machine，M2M)通信、机器类型通信(machine type communication，MTC)、车辆间(vehicle to vehicle，V2V)通信或者车联网(vehicle to everything，V2X)通信等，因此本申请实施例的技术方案也可以应用于上述无线通信系统。
可选地，本申请实施例中的无线通信系统可以应用于波束赋形(beamforming)、载波聚合(carrier aggregation，CA)、双连接(dual connectivity，DC)或者独立(standalone，SA)部署场景。
可选地，本申请实施例中的无线通信系统可以应用于非授权频谱。其中，非授权频谱也可以认为是共享频谱。或者，本实施例中的无线通信系统也可以应用于授权频谱。其中，授权频谱也可以认为是非共享频谱。
由于本申请实施例结合终端和网络设备描述了各个实施例，因此下面将对涉及的终端和网络设备进行具体描述。
具体的，终端可以是用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、智能终端、无线通信设备、用户代理或用户装置。终端还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、中继设备、车载设备、可穿戴设备、下一代通信系统例如 NR网络中的终端或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端等，对此不作具体限定。
进一步的，终端可以部署在陆地上，包括室内或室外、手持、穿戴或车载；可以部署在水面上(如轮船等)；还可以部署在空中(如飞机、气球和卫星等)。
进一步的，终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或智慧家庭(smart home)中的无线终端设备等。
具体的，网络设备可以是用于与终端之间进行通信的设备，网络设备可以是GSM或CDMA通信系统中的基站(base transceiver station，BTS)、WCDMA通信系统中的基站(nodeB，NB)、LTE通信系统中的演进型基站(evolutional node B，eNB或eNodeB)或者NR通信系统中的基站(gNB)。网络设备还可以是无线局域网WLAN中的接入点(access point，AP)、中继站、未来演进的PLMN网络中的网络设备或者NTN网络中的网络设备等。
需要说明的是，在一些网络部署中，gNB可以包括集中式单元(centralized unit，CU)和DU，而gNB还可以包括有源天线单元(active antenna unit，AAU)。其中，CU可以实现gNB的部分功能，而DU可以实现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)层和分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(medium access control，MAC)层和物理(physical，PHY)层的功能。另外，AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令(如RRC层信令)可以认为是由DU发送的，或者由DU+AAU发送的。可以理解的是，网络设备可以包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，对此不做具体限定。
进一步的，网络设备可以具有移动特性，例如网络设备可以为移动的设备。可选地，网络设备可以为卫星、气球站。例如，卫星可以为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、 地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(high elliptical orbit，HEO)卫星等。可选地，网络设备还可以为设置在陆地、水域等位置的基站。
进一步的，网络设备可以为小区提供服务，而该小区内的终端可以通过传输资源(如频谱资源)与网络设备进行通信。其中，该小区可以包括小小区(small cell)、城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)和毫微微小区(femto cell)等。
示例性的，本申请实施例应用的无线通信系统，如图1所示。无线通信系统10可以包括网络设备110和终端120，而网络设备110可以是与终端120执行通信的设备。同时，网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端120进行通信。
可选地，无线通信系统10还可以包括多个网络设备，并且每个网络设备的覆盖范围内可以包括其它数量的终端，在此不作具体限定。
可选地，无线通信系统10还可以包括网络控制器、移动管理实体等其他网络实体，在此不作具体限定。
可选地，无线通信系统10中的网络设备与终端之间，以及终端与终端之间的通信可以为无线通信或者有线通信，在此不作具体限制。
在对本实施例提供的无线通信方法进行详细介绍之前，再对本实施例所涉及的相关通信技术进行介绍。
在无线通信系统中，终端在网络设备的通信覆盖范围之内，可以接收系统消息和寻呼消息。在有业务需求时，终端可以发起随机接入流程建立无线资源控制(radio resource control，RRC)连接，进而在完成安全激活之后，建立数据无线承载并开始传输业务数据。
然而，当终端处于网络设备的通信覆盖范围之外时，终端通常不能与网络设备进行信息交互。由于实际的网络部署总会存在覆盖盲点，导致处于覆盖盲点的终端无法与网络设备进行通信。因此，3GPP在标准协议引入中继(Relay)的概念，并通过中继来提升网络覆盖以解决覆盖盲点的问题。
如图2所示，终端210(或称为remote UE)处于网络设备230的覆盖范围之外，因此终端210通过处于网络设备230的覆盖范围内的中继220(或称为Relay UE)接入网络。其中，中继220可以看作具有中继功能的终端，中继220与终端210采用PC5接口进行通信，并且网络设备230对应的小区作为终端210的服务小区。此时，中继220与服务小区采用现有终端与服务小区的通信机制，并且中继220与终端210可以通过直接通信机制进行数据和信令交互。对于下行，中继220可以将网络设备230发送给终端210的信令和数据转发给终端210；对于上行，中继220可以将终端210发送网络设备230的信令和数据转发给网络设备230。
另外，由于中继可能存在不断移动的情况，因此图3示例出中继320从服务小区移动到目标小区，并且中继320依然继续为终端310提供服务。其中，服务小区对应的网络设备为网络设备330，目标小区对应的网络设备为网络设备340。
然而，在实际基于中继的通信过程中，还存在如下通信场景：
场景一：终端(或称为remote UE)先在服务小区中处于连接态，由于服务小区信号太差，该终端探测是否存在可用的中继。如果有可用的中继，服务小区可以将该终端切换到该可用的中继，并由该可用的中继为该终端提供服务；
场景二：终端先在服务小区中处于连接态，并由服务小区为该终端配置一个或多个候选中继，以及相应的切换执行条件。然后，当该终端从一个或多个候选中继中判断出满足该切换执行条件的一个候选中继，该终端切换到该候选中继。
场景三：终端在服务小区中处于连接态，并且该终端已经通过中继与该服务小区对应的网络设备建立通信，可以顺利开展业务。此时，该终端需要从该中继切换到新的中继，或者从该中继切换到该服务小区中。
在上述的各个切换过程中，终端可能探测到切换失败或者无线链路失败(radio link failure，RLF)，终端如果采用目前通信协议规定的处理机制。例如，终端进行小区选择，如果有合适的小区(suitable cell)，则终端发起RRC重建请求(RRCReestablishmentRequest)进行重建流程；如果没有合适的小区，则终端进入空闲态。由于终端很容易因为发现不到合适的小区，而导致终端进入空闲态，从而终端无法继续开展业务，影响用户体验。
针对上述“场景一”“场景二”、“场景三”或者其他本申请涉及的无线通信系统中的切换过程，本申请实施例提供一种无线通信方法的流程示意图，请参阅图4。其中，该无线通信方法可以应用于本申请实施例的无线通信系统。该方法包括：
S410、在终端探测到无线链路失败或者切换失败时，终端确定可用的中继和/或合适的小区。
需要说明的是，本申请实施例中的终端可以在服务小区中处于连接态(RRC_CONNETED)或者通过中继接入网络处于连接态。另外，本申请实施例中的终端探测到无线链路失败或者切换失败的情况可以具体如上述“场景一”“场景二”或者“场景三”中的各个切换过程中的切换失败或者无线链路失败。也就是说，终端可以是在探测是否存在可用的中继的过程中的无线链路失败，可以在判断由网络配置的至少一个候选中继中是否存在满足切换执行条件的候选中继的过程中的无线链路失败；或者，终端可以是在由服务小区切换到探测到的可用的中继的过程中的切换失败，可以是在由终端切换 到配置的候选中继的过程中的切换失败，可以是在由终端从中继切换到新的中继的过程中的切换失败，也可以是在由终端从中继切换到服务小区的过程中的切换失败，对此不作具体限制。
进一步需要说明的是，终端确定可用的中继和/或合适的小区，可以理解为，终端既可以只确定出可用的中继，也可以只确定出合适的小区，还可以都确定出可用的中继和合适的小区，对此不作具体限制。
举例说明，在“场景一”中，在终端向可用的中继执行切换的过程中，由于终端无法在预设时间内与该可用的中继建立通信，或者即使终端与该可用的中继取得了通信，但是该可用的中继通知终端自己无法继续承担中继角色(如该可用的中继无法与自己所接入的小区实现通信)，从而导致切换失败。
下面本申请实施例将对终端如何确定可用的中继和/或合适的小区进行具体说明。
在一个可能的示例中，终端确定可用的中继和/或合适的小区，可以包括以下操作：终端执行中继发现流程和/或中继探测流程以确定可用的中继；和/或，终端从网络配置的至少一个候选中继中确定可用的中继；和/或，终端执行小区选择流程以确定合适的小区；和/或，终端执行小区选择流程以确定合适的小区，并根据合适的小区的系统消息确定可用的中继。
需要说明的是，网络配置的至少一个候选中继可以是在终端探测到无线链路失败或者切换失败之前，由网络通过信令配置给终端的。其中，该网络可以是服务小区对应的网络设备等；或者，该网络可以无线通信系统中的其他设备，对此不作具体限制。
进一步需要说明的是，在如何确定可用的中继和/或合适的小区的过程中，终端可以执行中继发现流程和/或中继探测流程，可以获取网络配置的至少一个候选中继，可以执行小区选择流程，还可以在执行小区选择流程确定出合适的小区中获取该合适的小区的系统消息。对于终端需要具体执行哪些流程或者操作，下面结合多种情形进行说明。
情形1：
具体的，如果终端已确定出可用的中继，则终端不执行小区选择流程。
可以理解的是，在如何确定可用的中继和/或合适的小区的过程中，如果终端已经通过执行中继发现流程和/或中继探测流程确定出可用的中继，或者如果终端已经通过从网络配置的至少一个候选中继中确定出可用的中继，则终端可以无需执行小区选择流程。
需要说明的是，如果终端有可用的中继，则不执行小区选择流程。此时，终端可以直接通过该可用的中继执行RRC重建或者切换流程以接入该可用的中继所接入的小区，从而保证终端能继续开展业务。同时，通过该方式可以 保证终端尽快恢复RRC连接或数据通信，减少因小区选择可能引入的较大时延。
情形2：
具体的，在终端执行中继发现流程和/或中继探测流程时，如果没有发现可用的中继，则终端再执行小区选择流程。
可以理解的是，在如何确定可用的中继和/或合适的小区的过程中，如果终端通过执行中继发现流程和/或中继探测流程没有发现可用的中继，则终端需要再执行小区选择流程。另外，在执行中继发现流程和/或中继探测流程中，由于受时间限制等原因，在预设的时间内终端没有发现可用的中继，因此终端执行小区选择流程，从而避免长时间探测中继以造成终端不能迅速恢复连接，影响用户体验。
情形3：
具体的，中继发现流程和/或中继探测流程以及小区选择流程由终端并行或同时执行。
可以理解的是，在如何确定可用的中继和/或合适的小区的过程中，终端可以并行或者同时执行中继发现流程和/或中继探测流程以及小区选择流程。
情形4：
具体的，中继发现流程和/或中继探测流程由终端优先执行；或者，小区选择流程由终端优先执行。
需要说明的是，本申请实施例中，终端是优先执行中继发现流程和/或中继探测流程，还是优先小区选择流程可以通过具体的切换场景确定。例如，在“场景一”中，当服务小区到终端的信号变差即终端测得服务小区的信号质量很差，并且没有其他可以切换的邻小区时，终端最有可能通过可用的中继执行切换，此时，终端可以优先执行中继发现流程和/或中继探测流程；在“场景三”中，当终端需要从中继切换到新的中继时，终端可以优先执行中继发现流程和/或中继探测流程；在“场景三”中，当终端需要从中继切换到服务小区时，终端可以优先执行小区选择流程。另外，终端优先执行中继发现和/或中继探测流程，或优先执行小区选择流程均受时间限制。例如，在预设的时间内，终端优先执行某流程，如果在该预设的时间内，没有发现可用的中继或合适的小区，则执行另一流程。
情形5：
具体的，在终端执行小区选择流程时，如果没有发现合适的小区，则终端再执行中继发现流程和/或中继探测流程。
可以理解的是，在如何确定可用的中继和/或合适的小区的过程中，如果终端通过执行小区选择流程没有发现合适的小区(或者，在预设时间内没有发现合适的小区)，则终端需要再执行中继发现流程和/或中继探测流程。
可见，在确定可用的中继和/上述各种情形的过程中，通过上述各种情形确定终端需要具体执行哪些流程或者操作以实现终端恢复RRC连接，从而有利于提高整个无线通信系统的灵活性。同时，提供多种终端恢复RRC连接的方式，保证终端尽快恢复RRC连接或数据通信，减少恢复RRC连接过程中的时延，以及提升终端恢复RRC连接的几率。
下面本申请实施将对中继发现流程进行具体说明。
具体的，中继发现流程可以包括以下步骤：终端接收第一信息，第一信息用于指示具有提供中继服务的至少一个中继。
需要说明的是，由于终端无法获知周围有哪些中继可以向自身提供中继服务，因此本申请实施考虑由能够提供中继服务的中继向周边广播自身具有提供中继服务的第一信息。此时，终端通过接收第一信息，获知提供中继服务的至少一个中继。
具体的，中继发现流程可以包括以下步骤：终端发送中继请求消息；终端接收响应于中继请求消息的第二信息，第二信息用于指示具有提供中继服务的至少一个中继。
需要说明的是，由于终端无法获知周围有哪些中继可以向自身提供中继服务，因此本申请实施考虑由终端向周围广播或发送中继请求消息。如果有中继接收到该中继请求消息，并且该中继愿意向终端提供中继服务，则该中继向终端发送响应于中继请求消息的第二信息。最终，终端通过接收第二信息，可以获知具有提供中继服务的至少一个中继。
下面本申请实施将对中继探测流程进行具体说明。
具体的，中继探测流程可以包括以下步骤：终端获取至少一个中继发送的信号；终端判断至少一个中继发送的信号是否满足第一预设条件。需要说明的是，本申请实施例可以先通过中继发现流程确定至少一个中继，再通过中继探测流程确定该至少一个中继中是否存在满足第一预设条件的中继，从而实现将满足第一预设条件的中继作为可用的中继。
进一步的，至少一个中继发送的信号可以包括以下至少一种：同步信号、解调参考信号(demodulation reference signal，DMRS)。
进一步的，第一预设条件可以包括：在终端检测或者测量至少一个中继发送的信号质量时(即终端检测或测量中继发送的信号，评估信号质量)，该至少一个中继发送的信号质量超过预设的门限。
其中，至少一个中继发送的信号质量可以通过参考信号接收功率(reference signal receiving power，RSRP)、参考信号接收质量(reference signal receiving quality，RSRQ)或者信号与干扰加噪声比(signal to interference plus noise ratio，SINR)等表示。
进一步的，第一预设条件可以由标准协议规定，可以由网络配置，也可 以是预配置的。
综上所述，在一个可能的示例中，终端执行中继发现流程和/或中继探测流程以确定可用的中继，可以包括以下操作：终端执行中继发现流程以确定至少一个中继；终端执行中继探测流程，并将至少一个中继中满足第一预设条件的中继作为可用的中继。
可以理解的是，在终端发现至少一个中继之后，终端需要探测该至少一个中继的信号是否满足第一预设条件。其中，终端探测该至少一个中继的信号质量是否超过预设门限，并将超过该预设门限的中继作为可用的中继。另外，在终端通过中继发现流程和/或中继探测流程确定出可用的中继之后，终端可以通过该可用的中继执行RRC重建，从而实现终端接入该可用的中继所接入的小区，保证终端尽快恢复RRC连接或数据通信，以及确保终端能继续开展业务。另外，通过中继执行RRC重建可以是终端将RRC重建请求发送给中继，再由中继将该重建请求转发给自己所接入的小区。如果该小区允许该终端的重建请求，则会向中继返回RRC重建消息，以便终端通过该重建消息恢复与网络的信令交互。
需要说明的是，上述将确定可用的中继的流程划分为中继发现流程和中继探测流程。在实际中，这两个流程也可以合在一起统称为中继的发现流程或中继的搜索流程。或者说，上述中继发现流程和中继探测流程是可以同时进行的。比如，在终端接收中继发送的第一信息时，该第一信息中包含解调参考信号，终端可以评估接收的解调参考信号是否满足第一预设条件。
具体的，若至少一个中继中满足第一预设条件的中继的数量大于或等于2，则可用的中继满足以下一种方式：可用的中继为满足第一预设条件的中继中的随机一个中继、可用的中继为满足第一预设条件的中继中RSRP最强的一个中继。
可以理解的是，如果终端在执行中继探测流程中存在有至少两个中继满足第一预设条件，则终端可以从该至少两个中继中随机选择一个中继作为可用的中继，也可以从该至少两个中继中选择RSRP最强的中继作为可用的中继，从而提高无线通信系统的灵活性。
另外，在本申请实施例中，由于终端可以在服务小区的边缘，并且该终端处于连接态，因此当服务小区发现没有合适的邻小区可以继续该终端提供服务时，服务小区对应的网络设备可以通知该终端执行中继探测流程，并向其上报可用的中继，以便服务小区对应的网络设备可以将该终端切换到该可用的中继。此外，服务小区需要首先与该可用的中继所接入的小区(可以是邻小区或者是该终端所接入的服务小区)进行通信，协商该终端的资源分配；其次，该可用的中继所接入的小区将分配的资源返回服务小区对应的网络设备；然后，服务小区对应的网络设备发送切换命令给该终端；其中，切换命 令包含该可用的中继所接入的小区为该终端分配的资源等信息；最后，该终端接收到切换命令之后，切换到该可用的中继。
下面本申请实施例将对终端如何从网络配置的至少一个候选中继中确定可用的中继进行具体说明。
在一个可能的示例中，终端从网络配置的至少一个候选中继中确定可用的中继，可以包括以下操作：终端获取由网络配置的至少一个候选中继和切换执行条件；终端将至少一个候选中继中满足切换执行条件或第二预设条件的候选中继作为可用的中继。
需要说明的是，服务小区对应的网络设备会预先为终端配置至少一个候选中继以及相应的切换执行条件，并且该网络设备已经与该至少一个候选中继所接入的小区(以及候选中继)提前协商好相关的资源分配等信息。此时，当终端从该至少一个候选中继中确定出可用的中继时，终端可以直接切换到该可用的中继，从而实现接入该可用的中继所接入的小区。相比于上述由终端执行中继发现流程和/或中继探测流程以及RRC重建进行切换的过程，由网络配置至少一个候选中继和相应的切换执行条件的方式有利于提高RRC恢复效率，以及保证终端尽快恢复数据通信。
具体的，第二预设条件可以包括：在终端检测至少一个候选中继发送的信号质量时(即终端检测候选中继发送的信号，评估信号质量)，至少一个候选中继发送的信号质量超过预设的门限。
下面本申请实施例将对小区选择流程进行具体说明。
具体的，小区选择流程可以包括以下步骤：终端扫描所支持的频点以发现频点上最强RSRP的合适小区。
需要说明的是，本申请实施例的小区选择流程中，终端执行小区选择，并且终端发现至少一个小区满足小区选择的条件。另外，小区选择的条件可以是标准协议TS38.304中规定的S准则。S准则是小区的信号满足预设的条件，并且在该小区所在的频点上，满足终端测得的该小区的RSRP是最强的。其中，小区的信号可以包括同步信号。
综上所述，在一个可能的示例中，终端执行小区选择流程以确定合适的小区，可以包括以下操作：终端扫描所支持的一个或多个频点；终端测量所支持的频点上合适小区的RSRP，并将频点上RSRP最强对应的合适小区作为小区选择的目标小区。
需要说明的是，在终端通过小区选择流程确定出合适小区之后，终端可以通过该合适的小区执行RRC重建，从而实现终端接入该合适的小区，保证终端尽快恢复RRC连接或数据通信，以及确保终端能继续开展业务。
下面本申请将对终端如何执行小区选择流程以确定合适的小区，并根据合适的小区的系统消息确定可用的中继进行具体说明。
在一个可能的示例中，终端执行小区选择流程以确定合适的小区，并根据合适的小区的系统消息确定可用的中继，可以包括以下操作：终端扫描所支持的一个或者多个频点；终端测量所支持的频点上小区的RSRP，并将频点上RSRP最强的合适小区作为小区选择的目标小区；终端获取该合适小区(即目标小区)的系统消息；终端通过该系统消息确定可用的中继；其中，系统消息携带支持中继接入的配置信息。
需要说明的是，终端可以通过合适小区的系统消息中的配置信息获取支持中继接入的配置信息。此时，终端可以执行中继发现和/或中继探测流程以发现接入该小区的至少一个可用的中继，然后选择其中一个中继进行RRC重建，从而实现接入该可用的中继所接入的小区，保证终端尽快恢复RRC连接或数据通信，以及保证终端能继续开展业务。
具体的，如果终端没有确定出可用的中继，则终端可以通过该合适的小区执行RRC重建。
综上所述，本申请实施例中的可用的中继可以包括由中继发现流程和/或中继探测流程确定出的可用的中继、由网络配置的至少一个候选中继中确定的可用的中继、由合适的小区的系统消息确定出可用的中继。因此，当同时存在上述情况时，本申请实施例可以将RSRP最强对应的中继作为可用的中继。
通过上述描述可知，在“场景二”中，终端可能在切换到配置的候选中继的过程中探测到切换失败。因此，在该情况下，下面本申请实施例再对终端如何确定可用的中继和/或合适的小区作一个示例说明。
在一个可能的示例中，若终端探测到的切换失败为终端在切换到第一候选中继的过程中的切换失败，第一候选中继为网络配置的至少一个候选中继中的一个，则终端确定可用的中继和/或合适的小区，可以包括以下操作：终端从网络配置的至少一个候选中继中除第一候选中继的其他中继中确定可用的中继；和/或，终端执行中继发现流程和/或中继探测流程以确定可用的中继；和/或，终端执行小区选择流程以确定合适的小区；和/或，终端执行小区选择流程以确定合适的小区，并根据合适的小区的系统消息确定可用的中继。
需要说明的是，本示例与上述描述终端确定可用的中继和/或合适的小区的示例的区别仅在终端在切换到第一候选中继的过程中失败，则存在一种终端需要从网络配置的至少一个候选中继中除第一候选中继的其他中继中确定可用的中继的方式，而其他确认可用的中继和/或合适的小区的方式与上述示例一致。本领域技术人员通过上述示例的描述可以获知本示例下的具体实施方式，在此不再赘述。
S420、终端通过该可用的中继和/或该合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区。
其中，第一小区可以包括该可用的中继所接入的小区或者该合适的小区。
需要说明的是，通过上述的描述可知，终端可以只确定出可用的中继，可以只确定出合适的小区，也可以都确定出可用的中继和合适的小区。此时，当可用的中继是由终端从网络配置的至少一个候选中继中确定，则终端可以通过切换流程直接接入该可用的中继，进而接入该中继所接入的小区，即第一小区。除此之外，终端需要通过RRC重建流程实现接入可用的中继所接入的小区，或者通过RRC重建流程接入合适的小区。最终，保证终端尽快恢复RRC连接或数据通信，减少恢复RRC连接过程中的时延，提升终端恢复RRC连接的几率，实现终端能继续开展业务。
进一步的需要说明的是，当终端都确定出可用的中继和合适的小区时，终端可以通过可用的中继的RSRP和合适的小区的RSRP来判断是接入可用的中继(进而通过可用的中继接入中继所接入的小区)还是接入合适的小区。下面进行具体说明。
在一个可能的示例中，终端通过可用的中继和/或合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，可以包括以下操作：若终端确定出可用的中继和合适的小区，则终端获取可用的中继的RSRP和合适的小区的RSRP；终端确定可用的中继的RSRP和合适的小区的RSRP中最强的RSRP对应的中继或小区；终端根据最强的RSRP对应的中继或小区执行RRC重建或者切换流程以接入第一小区。
需要说明的是，在终端确定出可用的中继和合适的小区时，终端可以对可用的中继的RSRP和合适的小区的RSRP进行排序，并选择最强的RSRP。如果最强的RSRP是可用的中继，则终端通过该可用的中继执行RRC重建或者切换流程以接入该可用的中继所接入的小区；如果最强的RSRP是合适的小区，则终端通过该合适的小区执行RRC重建或切换流程以接入该合适的小区。
进一步需要说明的是，由于本申请实施例进一步考虑到中继发送的信号和小区的发送信号之间可能存在差异，比如发送的信号功率或发送的信号质量之间存在差异，因此本申请实施例可以采用附加相应的偏移量(offset)的方式。具体描述如下：
具体的，在从可用的中继的RSRP和合适的小区的RSRP中确定最强的RSRP时，可以针对可用的中继的RSRP和合适的小区的RSRP附加相应的偏移量。
其中，偏移量可以不同。例如，可用的中继的RSRP附加相应的偏移量后可以表示为RSRP(Relay)+offset_1，而合适的小区的RSRP附加相应的偏移量后可以表示为RSRP(Cell)+offset_2，然后用附加偏移量的结果进行比较。
进一步的，偏移量可以由标准协议规定，可以由网络配置，也可以是预配置的。
进一步的，偏移量可以取正值，可以取负值，也可以取0。
在一个可能的示例中，终端通过可用的中继和/或合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，可以包括以下操作：终端优先通过可用的中继执行切换流程以接入第一小区；或者，终端优先通过可用的中继执行RRC重建以接入至第一小区；或者，终端优先通过合适的小区执行RRC重建以接入第一小区；或者，终端通过可用的中继的RSRP和合适的小区的RSRP中最强的RSRP对应的中继或小区执行RRC重建或者切换流程以接入第一小区。
可以理解的是，在终端如何通过可用的中继和/或合适的小区执行RRC重建或者切换流程，实现终端恢复RRC连接的过程中，本申请实施例考虑优先执行的策略(如优先通过可用的中继执行RRC重建)或者判断最强RSRP的策略，从而有利于提高整个无线通信系统的灵活性。同时，通过不同的恢复RRC连接的实现方式，保证终端尽快恢复RRC连接或数据通信，减少恢复RRC连接过程中的时延，以及提升终端恢复RRC连接的几率。
另外，由于可用的中继可以为网络配置的至少一个候选中继中的一个候选中继，因此在S420之前，终端可以通过该候选中继相应的配置执行切换，具体描述如下：
在一个可能的示例中，在终端通过可用的中继和/或合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，还包括以下操作：若可用的中继为第二候选中继，则终端通过第二候选中继相应的配置执行切换以接入第二候选中继；其中，第二候选中继为网络配置的至少一个候选中继中的一个。
进一步的，在终端通过可用的中继和/或合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，还包括以下操作：若终端在切换到第二候选中继过程中失败，则终端从至少一个候选中继中除第二候选中继的其他中继中确定可用的中继。
可以看出，本申请实施例中，在终端探测到无线链路失败或者切换失败时，终端通过确定可用的中继和/或合适的小区；然后，终端通过可用的中继和/或合适的小区执行RRC重建或者切换流程以接入第一小区。由于在终端探测到无线链路失败或者切换失败时，终端很容易因为发现不到合适的小区，而导致终端进入空闲态，以及无法继续开展业务，因此本申请通过可用的中继和/或合适的小区来执行RRC重建或者切换流程，从而实现终端接入可用的中继所接入的小区或者接入合适的小区，减少恢复RRC连接过程中的时延，保证终端尽快恢复RRC连接或数据通信，提升终端恢复RRC连接的几率， 以及确保终端继续开展业务。
上述主要从方法侧的角度对本申请实施例的方案进行了介绍。可以理解的是，终端为了实现上述功能，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与计算机软件的结合形式来实现。某个功能究竟以硬件或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。本领域技术人员可以对每个特定的应用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。
本申请实施例可以根据上述方法示例对终端进行功能单元的划分。例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件程序模块的形式实现。需要说明的是，本申请实施例中对单元的划分是示意性的，只是一种逻辑功能划分，而实际实现时可以有另外的划分方式。
在采用集成的单元的情况下，图5提供了一种无线通信装置的功能单元组成框图。无线通信装置500应用于终端，具体包括：处理单元502和通信单元503。处理单元502用于对终端的动作进行控制管理。例如，处理单元502用于支持终端执行图4中的部分步骤以及用于本申请所描述的技术方案的其它过程。通信单元503用于支持终端与无线通信系统中的其他设备之间的通信。无线通信装置500还可以包括存储单元501，用于存储终端的程序代码和数据。
其中，处理单元502可以是处理器或控制器，例如可以是中央处理器(central processing unit，CPU)、通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application-specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框、模块和电路。处理单元502也可以是实现计算功能的组合，例如包含一个或多个微处理器组合、DSP和微处理器的组合等等。通信单元503可以是通信接口、收发器、收发电路等，存储单元501可以是存储器。当处理单元502为处理器，通信单元503为通信接口，存储单元501为存储器时，本申请实施例所涉及的无线通信装置500可以为图6所示的终端。
具体实现时，处理单元502用于执行如上述方法实施例中由终端执行的任一步骤，且在执行诸如发送等数据传输时，可选择的调用通信单元503来完成相应操作。下面进行详细说明。
处理单元502用于：在终端探测到无线链路失败或者切换失败时，确定 可用的中继和/或合适的小区；通过可用的中继和/或合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，第一小区包括可用的中继所接入的小区或者合适的小区。
可以看出，本申请实施例中，在终端探测到无线链路失败或者切换失败时，终端通过确定可用的中继和/或合适的小区；然后，通过可用的中继和/或合适的小区执行RRC重建或者切换流程以接入第一小区。由于在终端探测到无线链路失败或者切换失败时，终端很容易因为发现不到合适的小区，而导致终端进入空闲态，以及无法继续开展业务，因此本申请通过可用的中继和/或合适的小区来执行RRC重建或者切换流程，从而实现终端接入可用的中继所接入的小区或者接入合适的小区，减少恢复RRC连接过程中的时延，保证终端尽快恢复RRC连接或数据通信，提升终端恢复RRC连接的几率，以及确保终端继续开展业务。
在一个可能的示例中，在确定可用的中继和/或合适的小区方面，处理单元502：执行中继发现流程和/或中继探测流程以确定所述可用的中继；和/或，从网络配置的至少一个候选中继中确定所述可用的中继；和/或，执行小区选择流程以确定所述合适的小区；和/或，执行所述小区选择流程以确定所述合适的小区，并根据所述合适的小区的系统消息确定所述可用的中继。
在一个可能的示例中，所述中继发现流程包括以下步骤：接收第一信息，所述第一信息用于指示具有提供中继服务的至少一个中继；或者，所述中继发现流程包括以下步骤：发送中继请求消息；接收响应于所述中继请求消息的第二信息，所述第二信息用于指示具有提供中继服务的至少一个中继。
在一个可能的示例中，所述中继探测流程包括以下步骤：获取所述至少一个中继发送的信号；判断所述至少一个中继发送的信号是否满足第一预设条件。
在一个可能的示例中，所述至少一个中继发送的信号包括以下至少一种：同步信号、解调参考信号。
在一个可能的示例中，所述第一预设条件包括：在检测所述至少一个中继发送的信号质量时，所述至少一个中继发送的信号质量超过预设的门限。
在一个可能的示例中，在执行中继发现流程和/或中继探测流程以确定所述可用的中继方面，处理单元502具体用于：执行所述中继发现流程以确定所述至少一个中继；执行所述中继探测流程，并将所述至少一个中继中满足所述第一预设条件的中继作为所述可用的中继。
在一个可能的示例中，若所述至少一个中继中满足所述第一预设条件的中继的数量大于或等于2，则所述可用的中继满足以下一种方式：所述可用的中继为所述满足所述第一预设条件的中继中的随机一个中继、所述可用的中继为所述满足所述第一预设条件的中继中参考信号接收功率RSRP最强的一 个中继。
在一个可能的示例中，在从网络配置的至少一个候选中继中确定所述可用的中继方面，处理单元502具体用于：获取由所述网络配置的所述至少一个候选中继和切换执行条件；将所述至少一个候选中继中满足所述切换执行条件或第二预设条件的候选中继作为所述可用的中继。
在一个可能的示例中，所述第二预设条件包括：在检测所述至少一个候选中继发送的信号质量时，所述至少一个候选中继发送的信号质量超过预设的门限。
在一个可能的示例中，如果已确定出所述可用的中继，则不执行所述小区选择流程。
在一个可能的示例中，在执行所述中继发现流程和/或所述中继探测流程时，如果没有发现可用的中继，则再执行所述小区选择流程。
在一个可能的示例中，所述中继发现流程和/或所述中继探测流程以及所述小区选择流程并行或同时执行。
在一个可能的示例中，所述中继发现流程和/或所述中继探测流程由所述终端优先执行；或者，所述小区选择流程由所述终端优先执行。
在一个可能的示例中，在执行所述小区选择流程时，如果没有发现合适的小区，再执行所述中继发现流程和/或所述中继探测流程。
在一个可能的示例中，若所述终端探测到的所述切换失败为所述终端在切换到第一候选中继的过程中的切换失败，所述第一候选中继为所述网络配置的至少一个候选中继中的一个，则在确定可用的中继和/或合适的小区方面，处理单元502具体用于：从所述网络配置的至少一个候选中继中除所述第一候选中继的其他中继中确定所述可用的中继；和/或，执行所述中继发现流程和/或所述中继探测流程以确定所述可用的中继；和/或，执行所述小区选择流程以确定所述合适的小区；和/或，执行所述小区选择流程以确定所述合适的小区，并根据所述合适的小区的系统消息确定所述可用的中继。
在一个可能的示例中，在通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区方面，处理单元502具体用于：若确定出所述可用的中继和所述合适的小区，则获取所述可用的中继的RSRP和所述合适的小区的RSRP；确定所述可用的中继的RSRP和所述合适的小区的RSRP中最强的RSRP对应的中继或小区；根据所述最强的RSRP对应的中继或小区执行所述RRC重建或者所述切换流程以接入所述第一小区。
在一个可能的示例中，在从所述可用的中继的RSRP和所述合适的小区的RSRP中确定最强的RSRP过程中，则针对所述可用的中继的RSRP和/或所述合适的小区的RSRP附加相应的偏移量。
在一个可能的示例中，在通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区方面，处理单元502具体用于：优先通过所述可用的中继执行所述切换流程以接入所述第一小区；或者，优先通过所述可用的中继执行所述RRC重建以接入至所述第一小区；或者，优先通过所述合适的小区执行所述RRC重建以接入所述第一小区；或者，通过所述可用的中继的RSRP和所述合适的小区的RSRP中最强的RSRP对应的中继或小区执行所述RRC重建或者所述切换流程以接入所述第一小区。
在一个可能的示例中，在通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，处理单元502还用于：若所述可用的中继为第二候选中继，则通过所述第二候选中继相应的配置执行切换以接入所述第二候选中继；其中，所述第二候选中继为所述网络配置的所述至少一个候选中继中的一个。
在一个可能的示例中，在通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，处理单元502还用于：若在切换到所述第二候选中继过程中失败，则从所述至少一个候选中继中除所述第二候选中继的其他中继中确定所述可用的中继。
请参阅图6，图6是本申请实施例提供的一种终端的结构示意图。其中，终端600包括处理器610、存储器620、通信接口630和至少一个用于连接处理器610、存储器620、通信接口630的通信总线。
存储器620包括但不限于是随机存储记忆体(random access memory，RAM)、只读存储器(read-only memory，ROM)、可擦除可编程只读存储器(erasable programmable eead only memory，PROM)或便携式只读存储器(compact disc read-only memory,CD-ROM)，该存储器620用于相关指令及数据。
通信接口630用于接收和发送数据。
处理器610可以是一个或多个CPU，在处理器610是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
终端600中的处理器610用于读取存储器620中存储的一个或多个程序621，执行以下操作：在终端探测到无线链路失败或者切换失败时，确定可用的中继和/或合适的小区；通过可用的中继和/或合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，第一小区包括可用的中继所接入的小区或者合适的小区。
可见，在终端探测到无线链路失败或者切换失败时，通过确定可用的中继和/或合适的小区；然后，通过可用的中继和/或合适的小区执行RRC重建或者切换流程以接入第一小区。由于在终端探测到无线链路失败或者切换失败时，终端很容易因为发现不到合适的小区，而导致终端进入空闲态，以及 无法继续开展业务，因此本申请通过可用的中继和/或合适的小区来执行RRC重建或者切换流程，从而实现终端接入可用的中继所接入的小区或者接入合适的小区，减少恢复RRC连接过程中的时延，保证终端尽快恢复RRC连接或数据通信，提升终端恢复RRC连接的几率，以及确保终端继续开展业务。
需要说明的是，各个操作的具体实现可以采用上述图4所示的方法实施例的相应描述，终端600可以用于执行本申请上述方法实施例的终端侧的方法，在此不再具体赘述。
本申请实施例还提供了一种芯片，其中，该芯片包括处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如上述方法实施例中终端或管理设备所描述的部分或全部步骤。
本申请实施例还提供了一种计算机可读存储介质，其中，所述计算机可读存储介质存储用于电子数据交换的计算机程序，其中，所述计算机程序使得计算机执行如上述方法实施例中终端或管理设备所描述的部分或全部步骤。
本申请实施例还提供了一种计算机程序产品，其中，所述计算机程序产品包括计算机程序，所述计算机程序可操作来使计算机执行如上述方法实施例中终端或管理设备所描述的部分或全部步骤。该计算机程序产品可以为一个软件安装包。
本申请实施例所描述的方法或者算法的步骤可以以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM、闪存、ROM、可擦除可编程只读存储器(erasable programmable ROM，EPROM)、电可擦可编程只读存储器(electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于终端或管理设备中。当然，处理器和存储介质也可以作为分立组件存在于终端或管理设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能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。该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该计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。该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。该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计算机可读存储介质传输。例如，该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(digital subscriber line，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。该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。该可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
以上所述的具体实施方式，对本申请实施例的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请实施例的具体实施方式而已，并不用于限定本申请实施例的保护范围，凡在本申请实施例的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请实施例的保护范围之内。

Claims (46)

  1. 一种无线通信方法，其中，包括：
    在终端探测到无线链路失败或者切换失败时，所述终端确定可用的中继和/或合适的小区；
    所述终端通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，所述第一小区包括所述可用的中继所接入的小区或者所述合适的小区。
  2. 根据权利要求1所述的方法，其中，所述终端确定可用的中继和/或合适的小区，包括：
    所述终端执行中继发现流程和/或中继探测流程以确定所述可用的中继；和/或，
    所述终端从网络配置的至少一个候选中继中确定所述可用的中继；和/或，
    所述终端执行小区选择流程以确定所述合适的小区；和/或，
    所述终端执行所述小区选择流程以确定所述合适的小区，并根据所述合适的小区的系统消息确定所述可用的中继。
  3. 根据权利要求2所述的方法，其中，所述中继发现流程包括以下步骤：所述终端接收第一信息，所述第一信息用于指示具有提供中继服务的至少一个中继；或者，
    所述中继发现流程包括以下步骤：所述终端发送中继请求消息；所述终端接收响应于所述中继请求消息的第二信息，所述第二信息用于指示具有提供中继服务的至少一个中继。
  4. 根据要求3所述的方法，其中，所述中继探测流程包括以下步骤：所述终端获取所述至少一个中继发送的信号；所述终端判断所述至少一个中继发送的信号是否满足第一预设条件。
  5. 根据权利要求4所述的方法，其中，所述至少一个中继发送的信号包括以下至少一种：同步信号、解调参考信号。
  6. 根据权要求4所述的方法，其中，所述第一预设条件包括：在所述终端检测所述至少一个中继发送的信号质量时，所述至少一个中继发送的信号质量超过预设的门限。
  7. 根据权利要求2所述的方法，其中，所述终端执行中继发现流程和/或中继探测流程以确定所述可用的中继，包括：
    所述终端执行所述中继发现流程以确定所述至少一个中继；
    所述终端执行所述中继探测流程，并将所述至少一个中继中满足所述第一预设条件的中继作为所述可用的中继。
  8. 根据权利要求7所述的方法，其中，若所述至少一个中继中满足所述第一预设条件的中继的数量大于或等于2，则所述可用的中继满足以下一种方式：所述可用的中继为所述满足所述第一预设条件的中继中的随机一个中继、所述可用的中继为所述满足所述第一预设条件的中继中参考信号接收功率 RSRP最强的一个中继。
  9. 根据权利要求2所述的方法，其中，所述终端从网络配置的至少一个候选中继中确定所述可用的中继，包括：
    所述终端获取由所述网络配置的所述至少一个候选中继和切换执行条件；
    所述终端将所述至少一个候选中继中满足所述切换执行条件或第二预设条件的候选中继作为所述可用的中继。
  10. 根据权利要求9所述的方法，其中，所述第二预设条件包括：在所述终端检测所述至少一个候选中继发送的信号质量时，所述至少一个候选中继发送的信号质量超过预设的门限。
  11. 根据权利要求2所述的方法，其中，如果所述终端已确定出所述可用的中继，则所述终端不执行所述小区选择流程。
  12. 根据权利要求2所述的方法，其中，在所述终端执行所述中继发现流程和/或所述中继探测流程时，如果没有发现可用的中继，则所述终端再执行所述小区选择流程。
  13. 根据权利要求2所述的方法，其中，所述中继发现流程和/或所述中继探测流程以及所述小区选择流程由所述终端并行或同时执行。
  14. 根据权利要求2所述的方法，其中，所述中继发现流程和/或所述中继探测流程由所述终端优先执行；或者，所述小区选择流程由所述终端优先执行。
  15. 根据权利要求2所述的方法，其中，在所述终端执行所述小区选择流程时，如果没有发现合适的小区，所述终端再执行所述中继发现流程和/或所述中继探测流程。
  16. 根据权利要求1所述的方法，其中，若所述终端探测到的所述切换失败为所述终端在切换到第一候选中继的过程中的切换失败，所述第一候选中继为所述网络配置的至少一个候选中继中的一个，则所述终端确定可用的中继和/或合适的小区，包括：
    所述终端从所述网络配置的至少一个候选中继中除所述第一候选中继的其他中继中确定所述可用的中继；和/或，
    所述终端执行所述中继发现流程和/或所述中继探测流程以确定所述可用的中继；和/或，
    所述终端执行所述小区选择流程以确定所述合适的小区；和/或，
    所述终端执行所述小区选择流程以确定所述合适的小区，并根据所述合适的小区的系统消息确定所述可用的中继。
  17. 根据权利要求1-16任一项所述的方法，其中，所述终端通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，包括：
    若所述终端确定出所述可用的中继和所述合适的小区，则所述终端获取所述可用的中继的RSRP和所述合适的小区的RSRP；
    所述终端确定所述可用的中继的RSRP和所述合适的小区的RSRP中最强的RSRP对应的中继或小区；
    所述终端根据所述最强的RSRP对应的中继或小区执行所述RRC重建或者所述切换流程以接入所述第一小区。
  18. 根据权利要求17所述的方法，其中，在从所述可用的中继的RSRP和所述合适的小区的RSRP中确定最强的RSRP过程中，则针对所述可用的中继的RSRP和/或所述合适的小区的RSRP附加相应的偏移量。
  19. 根据权利要求1-16任一项所述的方法，其中，所述终端通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，包括：
    所述终端优先通过所述可用的中继执行所述切换流程以接入所述第一小区；或者，
    所述终端优先通过所述可用的中继执行所述RRC重建以接入至所述第一小区；或者，
    所述终端优先通过所述合适的小区执行所述RRC重建以接入所述第一小区；或者，
    所述终端通过所述可用的中继的RSRP和所述合适的小区的RSRP中最强的RSRP对应的中继或小区执行所述RRC重建或者所述切换流程以接入所述第一小区。
  20. 根据权利要求1-16任一项所述的方法，其中，在所述终端通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，所述方法还包括：
    若所述可用的中继为第二候选中继，则所述终端通过所述第二候选中继相应的配置执行切换以接入所述第二候选中继；其中，所述第二候选中继为所述网络配置的所述至少一个候选中继中的一个。
  21. 根据权利要求20所述的方法，其中，在所述终端通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，所述方法还包括：
    若所述终端在切换到所述第二候选中继过程中失败，则所述终端从所述至少一个候选中继中除所述第二候选中继的其他中继中确定所述可用的中继。
  22. 一种无线通信装置，其中，应用于终端；所述装置包括处理单元，所述处理单元用于：
    在所述终端探测到无线链路失败或者切换失败时，确定可用的中继和/或合适的小区；
    通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区，所述第一小区包括所述可用的中继所接入的小区或者所述合适的小区。
  23. 根据权利要求22所述的装置，其中，在所述确定可用的中继和/或合 适的小区方面，所述处理单元具体用于：
    执行中继发现流程和/或中继探测流程以确定所述可用的中继；和/或，
    从网络配置的至少一个候选中继中确定所述可用的中继；和/或，
    执行小区选择流程以确定所述合适的小区；和/或，
    执行所述小区选择流程以确定所述合适的小区，并根据所述合适的小区的系统消息确定所述可用的中继。
  24. 根据权利要求23所述的装置，其中，所述中继发现流程包括以下步骤：接收第一信息，所述第一信息用于指示具有提供中继服务的至少一个中继；或者，
    所述中继发现流程包括以下步骤：发送中继请求消息；接收响应于所述中继请求消息的第二信息，所述第二信息用于指示具有提供中继服务的至少一个中继。
  25. 根据要求24所述的装置，其中，所述中继探测流程包括以下步骤：获取所述至少一个中继发送的信号；判断所述至少一个中继发送的信号是否满足第一预设条件。
  26. 根据权利要求25所述的装置，其中，所述至少一个中继发送的信号包括以下至少一种：同步信号、解调参考信号。
  27. 根据权要求25所述的装置，其中，所述第一预设条件包括：在所述终端检测所述至少一个中继发送的信号质量时，所述至少一个中继发送的信号质量超过预设的门限。
  28. 根据权利要求23所述的装置，其中，所述执行中继发现流程和/或中继探测流程以确定所述可用的中继，包括：
    执行所述中继发现流程以确定所述至少一个中继；
    执行所述中继探测流程，并将所述至少一个中继中满足所述第一预设条件的中继作为所述可用的中继。
  29. 根据权利要求28所述的装置，其中，若所述至少一个中继中满足所述第一预设条件的中继的数量大于或等于2，则所述可用的中继满足以下一种方式：所述可用的中继为所述满足所述第一预设条件的中继中的随机一个中继、所述可用的中继为所述满足所述第一预设条件的中继中参考信号接收功率RSRP最强的一个中继。
  30. 根据权利要求23所述的装置，其中，在所述从网络配置的至少一个候选中继中确定所述可用的中继方面，所述处理单元具体用于：
    获取由所述网络配置的所述至少一个候选中继和切换执行条件；
    将所述至少一个候选中继中满足所述切换执行条件或第二预设条件的候选中继作为所述可用的中继。
  31. 根据权利要求30所述的装置，其中，所述第二预设条件包括：在所述终端检测所述至少一个候选中继发送的信号质量时，所述至少一个候选中继发送的信号质量超过预设的门限。
  32. 根据权利要求23所述的装置，其中，如果所述已确定出所述可用的中继，则不执行所述小区选择流程。
  33. 根据权利要求23所述的装置，其中，在所述执行所述中继发现流程和/或所述中继探测流程时，如果没有发现可用的中继，则再执行所述小区选择流程。
  34. 根据权利要求23所述的装置，其中，所述中继发现流程和/或所述中继探测流程以及所述小区选择流程由所述终端并行或同时执行。
  35. 根据权利要求23所述的装置，其中，所述中继发现流程和/或所述中继探测流程由所述终端优先执行；或者，所述小区选择流程由所述终端优先执行。
  36. 根据权利要求23所述的装置，其中，在所述执行所述小区选择流程时，如果没有发现合适的小区，再执行所述中继发现流程和/或所述中继探测流程。
  37. 根据权利要求22所述的装置，其中，若所述探测到的所述切换失败为所述终端在切换到第一候选中继的过程中的切换失败，所述第一候选中继为所述网络配置的至少一个候选中继中的一个，则在所述确定可用的中继和/或合适的小区方面，所述处理单元具体用于：
    从所述网络配置的至少一个候选中继中除所述第一候选中继的其他中继中确定所述可用的中继；和/或，
    执行所述中继发现流程和/或所述中继探测流程以确定所述可用的中继；和/或，
    执行所述小区选择流程以确定所述合适的小区；和/或，
    执行所述小区选择流程以确定所述合适的小区，并根据所述合适的小区的系统消息确定所述可用的中继。
  38. 根据权利要求22-37任一项所述的装置，其中，在所述通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区方面，所述处理单元具体用于：
    若确定出所述可用的中继和所述合适的小区，则获取所述可用的中继的RSRP和所述合适的小区的RSRP；
    确定所述可用的中继的RSRP和所述合适的小区的RSRP中最强的RSRP对应的中继或小区；
    根据所述最强的RSRP对应的中继或小区执行所述RRC重建或者所述切换流程以接入所述第一小区。
  39. 根据权利要求38所述的装置，其中，在从所述可用的中继的RSRP和所述合适的小区的RSRP中确定最强的RSRP过程中，则针对所述可用的中继的RSRP和/或所述合适的小区的RSRP附加相应的偏移量。
  40. 根据权利要求22-37任一项所述的装置，其中，在所述通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入 第一小区方面，所述处理单元具体用于：
    优先通过所述可用的中继执行所述切换流程以接入所述第一小区；或者，
    优先通过所述可用的中继执行所述RRC重建以接入至所述第一小区；或者，
    优先通过所述合适的小区执行所述RRC重建以接入所述第一小区；或者，
    通过所述可用的中继的RSRP和所述合适的小区的RSRP中最强的RSRP对应的中继或小区执行所述RRC重建或者所述切换流程以接入所述第一小区。
  41. 根据权利要求22-37任一项所述的装置，其中，在所述通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，所述处理单元还用于：
    若所述可用的中继为第二候选中继，则通过所述第二候选中继相应的配置执行切换以接入所述第二候选中继；其中，所述第二候选中继为所述网络配置的所述至少一个候选中继中的一个。
  42. 根据权利要求41所述的装置，其中，在所述通过所述可用的中继和/或所述合适的小区执行无线资源控制RRC重建或者切换流程以接入第一小区之前，所述处理单元还用于：
    若在切换到所述第二候选中继过程中失败，则从所述至少一个候选中继中除所述第二候选中继的其他中继中确定所述可用的中继。
  43. 一种终端，其中，包括处理器、存储器、通信接口，以及一个或多个程序，所述一个或多个程序被存储在所述存储器中，并且被配置由所述处理器执行，所述程序包括用于执行如权利要求1-21任一项所述的方法中的步骤的指令。
  44. 一种计算机可读存储介质，其中，其存储用于电子数据交换的计算机程序，其中，所述计算机程序使得计算机执行如权利要求1-21任一项所述的方法。
  45. 一种芯片，包括处理器、存储器及存储在所述存储器上的计算机程序或指令，其中，所述处理器执行所述计算机程序或指令以实现权利要求1-21中任一项所述方法的步骤。
  46. 一种芯片模组，包括收发组件和芯片，所述芯片包括处理器、存储器及存储在所述存储器上的计算机程序或指令，其中，所述处理器执行所述计算机程序或指令以实现权利要求1-21中任一项所述方法的步骤。
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