Wireless Link Detection and Recovery Method, Apparatus, Device and Medium

Abstract

The present application discloses a method, apparatus, device and storage medium for wireless link detection and recovery, relating to the field of communications. The method includes: when a wireless link failure occurs in the serving primary cell or the secondary cell of a primary-secondary cell pair, the terminal sends a random access preamble on the fallback PRACH resource of the primary cell or the primary-secondary cell pair; the terminal receives a first PDCCH sent on the fallback CORESET resource of the primary cell or the primary-secondary cell pair, and the first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell pair, the secondary cell or other secondary cells. The present application solves the problem of PDCCH resource congestion on the PCell or PSCell, and ensures the reliability of the communication link.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and particularly to a method, apparatus, device and medium for wireless link detection and recovery. Background Art

[0002] The New Radio (NR) system supports dual-connectivity and / or carrier aggregation scenarios.

[0003] In the dual-connectivity and / or carrier aggregation scenarios, the Primary Cell (PCell) or the Primary Secondary Cell (PSCell) is supported to perform cross-carrier scheduling on the Secondary Cell (SCell).

[0004] Related technologies only support the measurement of Radio Link Monitoring (RLM) for the PCell or the PSCell, as well as the recovery and reconstruction of Radio Link Failure (RLF). Summary of the Invention

[0005] Embodiments of this application provide a method, apparatus, device and storage medium for wireless link detection and recovery. The technical solutions are as follows.

[0006] According to one aspect of this application, a method for wireless link detection and recovery is provided, the method including:

[0007] When a radio link failure occurs in the SCell scheduled by the PCell or the PSCell, the terminal sends a random access preamble on the fallback Physical Random Access Channel (PRACH) resource of the PCell or the PSCell.

[0008] The terminal receives a first Physical Downlink Control Channel (PDCCH) sent on the fallback Control Resource Set (CORESET) of the PCell or the PSCell, where the first PDCCH is used to schedule data channels on the PCell, the PSCell, the SCell or other SCells.

[0009] According to one aspect of this application, a method for wireless link detection and recovery is provided, the method including:

[0010] The network device receives the random access preamble sent by the terminal on the fallback random access channel resource of the PCell or the PSCell, where the random access preamble is sent when a radio link failure occurs in the SCell.

[0011] Send a first PDCCH to the terminal on the fallback CORESET resource of the primary cell or the primary-secondary cell, where the first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0012] According to one aspect of the present application, a wireless link detection and recovery device is provided. The device includes:

[0013] A sending module, configured to send a random access preamble on a fallback random access channel resource when a wireless link failure occurs in a secondary cell;

[0014] A receiving module, configured to receive a first PDCCH sent on a fallback CORESET resource, where the first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0015] According to one aspect of the present application, a wireless link detection and recovery device is provided. The device includes:

[0016] A receiving module, configured to receive a random access preamble sent by a terminal on a fallback random access channel resource, where the random access preamble is sent when a wireless link failure occurs in a secondary cell;

[0017] A sending module, configured to send a first PDCCH to the terminal on a fallback CORESET resource, where the first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0018] According to one aspect of the present application, a terminal is provided. The terminal includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein, the processor is configured to load and execute the executable instructions to implement the wireless link detection and recovery method as described in the above aspect.

[0019] According to one aspect of the present application, a network device is provided. The network device includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein, the processor is configured to load and execute the executable instructions to implement the wireless link detection and recovery method as described in the above aspect.

[0020] According to one aspect of the present application, a computer-readable storage medium is provided. The readable storage medium stores executable instructions, and the executable instructions are loaded and executed by the processor to implement the wireless link detection and recovery method as described in the above aspect.

[0021] According to one aspect of the present application, a computer program product is provided. Executable instructions are stored in the readable storage medium, and the executable instructions are loaded and executed by the processor to implement the wireless link detection and recovery method as described in the above aspect.

[0022] According to one aspect of the present application, a chip is provided. The chip is used to execute to implement the wireless link detection and recovery method as described in the above aspect.

[0023] The technical solutions provided in the embodiments of the present application at least include the following beneficial effects:

[0024] In summary, for the method provided in this embodiment, in the scenario where the SCell is used to schedule data transmission on the PCell or PSCell, fallback PRACH resources, fallback CORESET resources, and random access preambles are provided, so that when a wireless link failure occurs in the SCell, the fallback CORESET resources can be quickly used to restore the connection of the physical layer control channel between the network device and the terminal, that is, the problem of PDCCH resource congestion on the PCell or PSCell is solved, and the reliability of the communication link is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a network architecture diagram of a communication system provided by an exemplary embodiment of the present application;

[0027] Figure 2 is a flowchart of a wireless link detection and recovery method provided by an exemplary embodiment of the present application;

[0028] Figure 3 is a flowchart of a wireless link detection and recovery method provided by an exemplary embodiment of the present application;

[0029] Figure 4 is a flowchart of a wireless link detection and recovery method provided by an exemplary embodiment of the present application;

[0030] Figure 5 is a flowchart of a wireless link detection and recovery method provided by an exemplary embodiment of the present application;

[0031] Figure 6 is a block diagram of a wireless link detection and recovery device provided by an exemplary embodiment of the present application;

[0032] Figure 7 is a block diagram of a wireless link detection and recovery device provided by an exemplary embodiment of the present application;

[0033] Figure 8 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0035] Figure 1 shows a schematic architecture diagram of a communication system provided by an embodiment of the present application. The communication system may include: a terminal 10 and a network device 20.

[0036] The number of terminals 10 is usually multiple, and one or more terminals 10 may be distributed within the cell managed by each network device 20. The terminal 10 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile station (MS), and so on. For ease of description, in the embodiments of the present application, the above-mentioned devices are collectively referred to as terminals.

[0037] The network device 20 is a device deployed in the access network to provide wireless communication functions for the terminal 10. The network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and so on. In systems using different radio access technologies, the name of the device with network device functions may be different. For example, in a 5G NR system, it is called a gNodeB or gNB. With the evolution of communication technologies, the name of the "network device" may change. For ease of description, in the embodiments of the present application, the device that provides wireless communication functions for the terminal 10 is collectively referred to as a network device.

[0038] The "5G NR system" in the embodiments of the present disclosure may also be referred to as a 5G system or an NR system. The NR system may be a communication system supporting NR-U, or may be a non-terrestrial network (NTN). The technical solutions described in the embodiments of the present disclosure may be applicable to a 5G NR system or subsequent evolved systems of the 5G NR system.

[0039] This application provides a wireless link detection and recovery method and apparatus applicable to the carrier aggregation scenario. When the network device uses SCell cross-carrier scheduling for PCell or PSCell, it can quickly detect the radio link failure of the SCell and quickly restore the connection of the physical layer control channel between the network device and the terminal, that is, it solves the problem of PDCCH resource congestion on the PCell or PSCell and ensures the reliability of the communication link.

[0040] Figure 2 The flowchart of the wireless link detection and recovery method provided by an exemplary embodiment of this application is shown. This method can be executed by a terminal, and this method includes:

[0041] Step 202: When a radio link failure occurs in the SCell, send a random access preamble on the fallback PRACH resource;

[0042] The terminal performs RLM measurement on the SCell. When the measurement result of RLM is that the SCell has an RLF, send a random access preamble on the fallback PRACH resource.

[0043] The fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the PCell; or, the fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the PSCell.

[0044] Optionally, the secondary cell is used to schedule data transmission on the PCell or PSCell.

[0045] Step 204: Receive the first PDCCH sent on the fallback CORESET resource, and the first PDCCH is used to schedule the data channel on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0046] The data channel includes but is not limited to at least one of the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH).

[0047] Optionally, the first PDCCH is used to schedule at least one of the PUSCH and PDSCH on the PCell; or, the first PDCCH is used to schedule at least one of the PUSCH and PDSCH on the PSCell; or, the first PDCCH is used to schedule at least one of the PUSCH and PDSCH on the SCell; or, the first PDCCH is used to schedule at least one of the PDSCH and PUSCH on other SCell.

[0048] In summary, in the scenario where the SCell is used to schedule data transmission on the PCell or PSCell, the method provided in this embodiment provides fallback PRACH resources, fallback CORESET resources, and random access preambles, enabling the physical layer control channel connection between the network device and the terminal to be quickly restored using the fallback CORESET resources when a radio link failure occurs in the SCell. That is, it solves the problem of PDCCH resource congestion on the PCell or PSCell and ensures the reliability of the communication link.

[0049] Figure 3 The flowchart of a wireless link detection and recovery method provided by an exemplary embodiment of the present application is shown. This method can be executed by a network device, and the method includes:

[0050] Step 302: Receive the random access preamble sent by the terminal on the fallback PRACH resource, where the random access preamble is sent when a radio link failure occurs in the SCell;

[0051] The terminal performs RLM measurement on the SCell. When the measurement result of the RLM indicates that an RLF occurs in the SCell, the terminal sends a random access preamble on the fallback PRACH resource. The network device receives the random access preamble sent by the terminal on the fallback PRACH resource.

[0052] The fallback random access channel resources, fallback CORESET resources, and random access preambles are resources on the PCell; or, the fallback random access channel resources, fallback CORESET resources, and random access preambles are resources on the PSCell.

[0053] Optionally, the secondary cell is used to schedule data transmission on the PCell or PSCell.

[0054] Step 304: Send a first PDCCH on the fallback CORESET resource, where the first PDCCH is used to schedule data channels on the primary cell, primary-secondary cell, secondary cell, or other secondary cells.

[0055] The data channels include but are not limited to at least one of PUSCH and PDSCH.

[0056] Optionally, the first PDCCH is used to schedule at least one of PUSCH and PDSCH on the PCell; or, the first PDCCH is used to schedule at least one of PUSCH and PDSCH on the PSCell; or, the first PDCCH is used to schedule at least one of PUSCH and PDSCH on the SCell; or, the first PDCCH is used to schedule at least one of PDSCH and PUSCH on other SCells.

[0057] In summary, in the scenario where the SCell is used to schedule data transmission on the PCell or PSCell, the method provided in this embodiment provides fallback PRACH resources, fallback CORESET resources, and random access preambles, enabling rapid restoration of the connection of the physical layer control channel between the network device and the terminal using the fallback CORESET resources when a radio link failure occurs in the SCell. This not only solves the problem of PDCCH resource congestion on the PCell or PSCell but also ensures the reliability of the communication link.

[0058] Figure 4 The flowchart of a radio link detection and restoration method provided by another exemplary embodiment of the present application is shown. This method can be executed by a network device and a terminal, and the method includes:

[0059] Step 401: The network device sends configuration information to the terminal, where the configuration information is used to configure fallback PRACH resources, fallback CORESET resources, and random access preambles;

[0060] The configuration information is carried in a high-layer signaling or a physical layer signaling. For example, the configuration information is carried in a Radio Resource Control (RRC) signaling.

[0061] Optionally, the configuration information includes first configuration information or second configuration information. The first configuration information is used to configure fallback random access channel resources, fallback CORESET resources, and random access preambles on the PCell; or, receive second configuration information, where the second configuration information is used to configure fallback random access channel resources, fallback CORESET resources, and random access preambles on the PSCell.

[0062] Step 402: The terminal receives the configuration information from the network device;

[0063] Step 403: The terminal monitors the PDCCH on the SCell and performs RLM measurements;

[0064] Optionally, the secondary cell is used to schedule data transmission on the PCell or PSCell.

[0065] The network device sends a PDCCH on the SCell, and the PDCCH is used to schedule data transmission on the PCell or PSCell.

[0066] Step 404: When the terminal experiences an RLF on the SCell, it sends a random access preamble on the fallback PRACH resource;

[0067] The terminal performs RLM measurement on the SCell. When the measurement result of RLM indicates that RLF occurs on the SCell, the terminal sends a random access preamble on the fallback PRACH resource.

[0068] Step 405: The network device receives the random access preamble sent by the terminal on the fallback PRACH resource. The random access preamble is sent when radio link failure occurs on the SCell.

[0069] The network device receives the random access preamble sent by the terminal on the fallback PRACH resource.

[0070] The fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the PCell; or, the fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the PSCell.

[0071] Optionally, the secondary cell is used to schedule data transmission on the PCell or the PSCell.

[0072] Step 406: The network device sends a first PDCCH on the fallback CORESET resource. The first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0073] The data channels include but are not limited to at least one of PUSCH and PDSCH.

[0074] Optionally, the first PDCCH carries downlink control information (DCI). The DCI is used to schedule data channels on the PCell or the PSCell. The data channels include at least one of PUSCH and PDSCH.

[0075] Optionally, the first PDCCH is used to schedule at least one of PUSCH and PDSCH on the PCell; or, the first PDCCH is used to schedule at least one of PUSCH and PDSCH on the PSCell; or, the first PDCCH is used to schedule at least one of PUSCH and PDSCH on the SCell; or, the first PDCCH is used to schedule at least one of PDSCH and PUSCH on other SCell.

[0076] Step 407: The terminal receives the first PDCCH sent on the fallback CORESET resource. The first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0077] The terminal transmits uplink data on the data channel of the primary cell, the primary and secondary cell, the secondary cell, or other secondary cells according to the first PDCCH, or receives downlink data on the data channel of the primary cell, the primary and secondary cell, the secondary cell, or other secondary cells.

[0078] In summary, in the scenario where the SCell is used to schedule data transmission on the PCell or PSCell, the method provided in this embodiment provides fallback PRACH resources, fallback CORESET resources, and random access preambles, so that when a radio link failure occurs in the SCell, the fallback CORESET resources can be quickly used to restore the connection of the physical layer control channel between the network device and the terminal, that is, it solves the problem of PDCCH resource congestion on the PCell or PSCell, and ensures the reliability of the communication link.

[0079] Figure 5 The flowchart of the radio link detection and recovery method provided by another exemplary embodiment of the present application is shown. This method can be executed by a network device and a terminal, and the method includes:

[0080] Step 501: The network device sends configuration information to the terminal, and the configuration information is used to configure fallback PRACH resources, fallback CORESET resources, and random access preambles;

[0081] The configuration information is carried in a high-layer signaling or a physical-layer signaling. For example, the configuration information is carried in a Radio Resource Control (RRC) signaling.

[0082] Optionally, the configuration information includes first configuration information or second configuration information. The first configuration information is used to configure the fallback random access channel resources, fallback CORESET resources, and random access preambles on the PCell; or, receive the second configuration information, and the second configuration information is used to configure the fallback random access channel resources, fallback CORESET resources, and random access preambles on the PSCell.

[0083] Step 502: The terminal receives the configuration information of the network device;

[0084] Step 503: The terminal monitors the PDCCH on the SCell and performs RLM measurements;

[0085] Optionally, the secondary cell is used to schedule data transmission on the PCell or PSCell.

[0086] The network device sends a PDCCH on the SCell, and the PDCCH is used to schedule data transmission on the PCell or PSCell.

[0087] Step 504: When RLF occurs on the SCell, the terminal sends a random access preamble on the fallback PRACH resource;

[0088] The terminal performs RLM measurement on the SCell. When the measurement result of RLM indicates that RLF has occurred on the SCell, the terminal sends a random access preamble on the fallback PRACH resource.

[0089] Optionally, the secondary cell is used to schedule data transmission on the PCell or PSCell.

[0090] Step 505: The network device receives the random access preamble sent by the terminal on the fallback PRACH resource, where the random access preamble is sent when radio link failure occurs on the SCell;

[0091] The network device receives the random access preamble sent by the terminal on the fallback PRACH resource.

[0092] The fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the PCell; or, the fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the PSCell.

[0093] Optionally, the secondary cell is used to schedule data transmission on the PCell or PSCell.

[0094] Step 506: The network device sends a second PDCCH on the SCell, where the second PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0095] The data channels include but are not limited to at least one of PUSCH and PDSCH.

[0096] Optionally, the second PDCCH carries downlink control information (DCI), and the DCI is used to schedule data channels on the PCell or PSCell. The data channels include at least one of PUSCH and PDSCH.

[0097] Optionally, the second PDCCH is used to schedule at least one of PUSCH and PDSCH on the PCell; or, the second PDCCH is used to schedule at least one of PUSCH and PDSCH on the PSCell; or, the second PDCCH is used to schedule at least one of PUSCH and PDSCH on the SCell; or, the second PDCCH is used to schedule at least one of PDSCH and PUSCH on other SCell.

[0098] Step 507: The terminal receives a second PDCCH sent on the SCell, where the second PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0099] The terminal transmits uplink data on the data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells according to the second PDCCH, or receives downlink data on the data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0100] In summary, in the method provided in this embodiment, in a scenario where the SCell is used to schedule data transmission on the PCell or the PSCell, when a radio link failure occurs on the SCell, the scheduling of data transmission on the PCell or the PSCell is continued on the SCell, which can save the PDCCH resources on the PCell or the PSCell as much as possible.

[0101] The above method embodiments can be implemented alone or in combination, and the present application does not make any limitations.

[0102] Figure 6 The block diagram of a radio link detection and recovery device provided by an exemplary embodiment of the present application is shown. The device can be applied to a terminal. The device includes:

[0103] A sending module 620, configured to send a random access preamble on a fallback random access channel resource when a radio link failure occurs on a secondary cell;

[0104] A receiving module 640, configured to receive a first physical downlink control channel PDCCH sent on a fallback CORESET resource, where the first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells.

[0105] In an alternative design of the present application, the secondary cell is used to schedule the primary cell or the primary-secondary cell.

[0106] In an alternative design of the present application, the receiving module 640 is configured to monitor the PDCCH on the SCell and perform RLM measurement.

[0107] In an alternative design of the present application, the receiving module 640 is configured to receive first configuration information for configuring the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary cell; or, the receiving module 640 is configured to receive second configuration information for configuring the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary-secondary cell.

[0108] In an alternative design of the present application, the receiving module 640 is configured to receive a second PDCCH transmitted on a secondary cell, where the second PDCCH is used to schedule data channels on a primary cell, a primary-secondary cell, a secondary cell, or other secondary cells.

[0109] Figure 7 The block diagram of a wireless link detection and recovery device provided by an exemplary embodiment of the present application is shown. The device can be applied to a network device. The device includes:

[0110] A receiving module 720, configured to receive a random access preamble transmitted by a terminal on a fallback random access channel resource, where the random access preamble is transmitted when a radio link failure occurs in a secondary cell;

[0111] A transmitting module 740, configured to transmit a first physical downlink control channel PDCCH to the terminal on a fallback CORESET resource, where the first PDCCH is used to schedule data channels on a primary cell, a primary-secondary cell, a secondary cell, or other secondary cells.

[0112] In an alternative design of the present application, the secondary cell is used to schedule the primary cell or the primary-secondary cell.

[0113] In an alternative design of the present application, the transmitting module 740 is configured to transmit first configuration information, where the first configuration information is used to configure the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary cell; or, the transmitting module 740 is configured to transmit second configuration information, where the second configuration information is used to configure the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary-secondary cell.

[0114] In an alternative design of the present application, the transmitting module 740 is configured to transmit a second PDCCH to the terminal on a secondary cell, where the second PDCCH is used to schedule data channels on a primary cell, a primary-secondary cell, a secondary cell, or other secondary cells.

[0115] Figure 8 The schematic structural diagram of a communication device (network device or terminal) provided by an exemplary embodiment of the present application is shown. The communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

[0116] The processor 101 includes one or more processing cores. The processor 101 executes various functional applications and information processing by running software programs and modules.

[0117] The receiver 102 and the transmitter 103 can be implemented as a communication component, which can be a communication chip.

[0118] The memory 104 is connected to the processor 101 through the bus 105.

[0119] The memory 104 can be used to store at least one instruction, and the processor 101 is used to execute the at least one instruction to implement each step in the above method embodiments.

[0120] In addition, the memory 104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage devices include but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

[0121] In an exemplary embodiment, a computer-readable storage medium is also provided. The computer-readable storage medium stores at least one instruction, at least one segment of program, a code set or an instruction set, and the at least one instruction, the at least one segment of program, the code set or the instruction set are loaded and executed by the processor to implement the wireless link detection and recovery method executed by the terminal or the network device provided by the above method embodiments.

[0122] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or can be completed by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and the above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc.

[0123] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wireless link detection and recovery method, characterized in that The method is executed by a terminal, and the method includes: Performing radio link monitoring (RLM) measurements on a secondary cell to obtain measurement results of the RLM; the secondary cell is used to schedule a primary cell or a primary and secondary cell; When the measurement result indicates that a radio link failure has occurred in the secondary cell, sending a random access preamble on fallback random access channel resources; Receiving a first physical downlink control channel (PDCCH) sent on fallback control resource set (CORESET) resources, where the first PDCCH is used to schedule data channels on the primary cell, the primary and secondary cell, the secondary cell, or other secondary cells; Wherein, the fallback random access channel resources, the fallback CORESET resources, and the random access preamble are resources on the primary cell; or, the fallback random access channel resources, the fallback CORESET resources, and the random access preamble are resources on the primary and secondary cell.

2. The method according to claim 1, wherein The method further includes: Receiving first configuration information for configuring the fallback random access channel resources, the fallback CORESET resources, and the random access preamble on the primary cell; Or, Receiving second configuration information for configuring the fallback random access channel resources, the fallback CORESET resources, and the random access preamble on the primary and secondary cell.

3. The method according to claim 1, wherein The method further includes: Receiving a second PDCCH sent on the secondary cell, where the second PDCCH is used to schedule data channels on the primary cell, the primary and secondary cell, the secondary cell, or the other secondary cells.

4. A method for detecting and recovering a wireless link, characterized in that, The method is executed by a network device, and the method includes: Receiving, on fallback random access channel resources, a random access preamble sent by a terminal, where the random access preamble is sent by the terminal when the measurement result indicates that a radio link failure has occurred in the secondary cell; the measurement result is the measurement result of the terminal performing radio link monitoring (RLM) measurements on the secondary cell; the secondary cell is used to schedule a primary cell or a primary and secondary cell; Sending a first physical downlink control channel (PDCCH) to the terminal on fallback control resource set (CORESET) resources, where the first PDCCH is used to schedule data channels on the primary cell, the primary and secondary cell, the secondary cell, or other secondary cells; Wherein, the fallback random access channel resources, the fallback CORESET resources, and the random access preamble are resources on the primary cell; or, the fallback random access channel resources, the fallback CORESET resources, and the random access preamble are resources on the primary and secondary cell.

5. The method according to claim 4, wherein The method further includes: Sending first configuration information for configuring the fallback random access channel resources, the fallback CORESET resources, and the random access preamble on the primary cell; Or, Sending second configuration information for configuring the fallback random access channel resources, the fallback CORESET resources, and the random access preamble on the primary and secondary cell.

6. The method according to claim 4, characterized in that, The method further includes: Transmit a second PDCCH to the terminal on the secondary cell, where the second PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or the other secondary cells.

7. A wireless link detection and recovery device, characterized in that, The apparatus comprises: a transmitting module, configured to transmit a random access preamble on a fallback random access channel resource when a radio link failure occurs in a secondary cell; the random access preamble is transmitted when a measurement result indicates that a radio link failure has occurred in the secondary cell; the measurement result is a measurement result of radio link monitoring (RLM) measurement performed on the secondary cell; the secondary cell is used to schedule the primary cell or the primary-secondary cell; a receiving module, configured to receive a first physical downlink control channel (PDCCH) transmitted on a fallback control resource set (CORESET) resource, where the first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells; wherein the fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the primary cell; or, the fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the primary-secondary cell.

8. The apparatus according to claim 7, wherein: the receiving module is configured to receive first configuration information for configuring the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary cell; or, the receiving module is configured to receive second configuration information for configuring the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary-secondary cell.

9. The device according to claim 7, characterized in that the receiving module is configured to receive a second PDCCH transmitted on the secondary cell, where the second PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or the other secondary cells.

10. A wireless link detection and recovery device, characterized in that, The apparatus comprises: a receiving module, configured to receive a random access preamble transmitted by a terminal on a fallback random access channel resource, where the random access preamble is transmitted by the terminal when a measurement result indicates that a radio link failure has occurred in a secondary cell; the measurement result is a measurement result of radio link monitoring (RLM) measurement performed by the terminal on the secondary cell; the secondary cell is used to schedule the primary cell or the primary-secondary cell; a transmitting module, configured to transmit a first physical downlink control channel (PDCCH) to the terminal on a fallback control resource set (CORESET) resource, where the first PDCCH is used to schedule data channels on the primary cell, the primary-secondary cell, the secondary cell, or other secondary cells; wherein the fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the primary cell; or, the fallback random access channel resource, the fallback CORESET resource, and the random access preamble are resources on the primary-secondary cell.

11. The apparatus according to claim 10, wherein: The sending module is configured to send first configuration information for configuring the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary cell; or The sending module is configured to send second configuration information for configuring the fallback random access channel resource, the fallback CORESET resource, and the random access preamble on the primary secondary cell.

12. The apparatus according to claim 10, wherein The sending module is configured to send a second PDCCH to the terminal on the secondary cell, where the second PDCCH is used to schedule data channels on the primary cell, the primary secondary cell, the secondary cell, or the other secondary cell.

13. A terminal, characterized in that, The terminal includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the wireless link detection and recovery method according to any one of claims 1 to 3.

14. A network device, characterized in that, The network device includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the wireless link detection and recovery method according to any one of claims 4 to 6.

15. A computer-readable storage medium, characterized in that, The readable storage medium stores executable instructions, and the executable instructions are loaded and executed by a processor to implement the wireless link detection and recovery method according to any one of claims 1 to 6.

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