WO2023011165A1

WO2023011165A1 - Communication method and apparatus

Info

Publication number: WO2023011165A1
Application number: PCT/CN2022/106482
Authority: WO
Inventors: 顾志方; 娄崇
Original assignee: 华为技术有限公司
Priority date: 2021-08-06
Filing date: 2022-07-19
Publication date: 2023-02-09
Also published as: CN115707010A

Abstract

A communication method and apparatus, for use in performing radio link monitoring on multiple TRPs in a multi-TRP transmission scenario, respectively. A first access network device sends radio link monitoring configuration information of a first TRP and radio link monitoring configuration information of a second TRP to a terminal device, so that the terminal device performs radio link monitoring on a serving cell according to the radio link monitoring configuration information of the first TRP, and performs radio link monitoring on a first cell according to the radio link monitoring configuration information of the second TRP; the first access network device is an access network device that manages radio resources of the serving cell, the first TRP is an antenna or an antenna panel of the first access network device, and the second TRP corresponds to the first cell. In this way, the terminal device can perform radio link monitoring on cells corresponding to the multiple TRPs in the multi-TRP scenario, so as to perform targeted operations subsequently when RLF occurs in different cells, thereby ensuring data transmission.

Description

A communication method and device

Cross References to Related Applications

This application claims the priority of a Chinese patent application with application number 202110902702.9 and application title "A Communication Method and Device" submitted to the China Patent Office on August 6, 2021, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the technical field of communication, and in particular to a communication method and device.

Background technique

The fifth generation (5th Generation, 5G) communication system supports multiple input multiple output (MIMO) with 16, 32, 64 or 128 antennas. MIMO in 5G can be called massive MIMO. Massive MIMO technology requires beam management to communicate through beam directions with better communication quality. In high-frequency communication scenarios, the beam is more likely to be blocked by obstacles such as cars or human bodies, resulting in beam failure or even wireless link failure. To solve the above problems, multiple transmission reception points (multi (transmission reception point, TRP), mTRP) can be used to cooperate to maintain a reliable connection. In addition, multiple TRPs serve terminal equipment together, which can increase transmission capacity and improve user experience at the cell edge.

Contents of the invention

The present application provides a communication method and device for realizing wireless link monitoring for multiple TRPs in a multiple (transmission reception point, TRP) transmission scenario.

In a first aspect, the present application provides a communication method, which is applied to a multi-transmission receiving point TRP transmission scenario, and the method can be applied to a terminal device, a processor, a chip, or a functional module in the terminal device, and the like. The method may include: receiving radio link monitoring configuration information of the first TRP and radio link monitoring configuration information of the second TRP from the first access network device; and according to the radio link monitoring configuration information of the first TRP Perform radio link monitoring on the serving cell, and perform radio link monitoring on the first cell according to the radio link monitoring configuration information of the second TRP; wherein, the first access network device is the one that manages the serving cell Access network equipment of wireless resources, the first TRP is an antenna or an antenna panel of the first access network equipment, the second TRP corresponds to the first cell, the serving cell and the first cell different physical cell identities (physical cell identity, PCI), and the terminal device communicates with the first TRP and the second TRP.

Through the above method, the terminal device can monitor the radio links of the cells corresponding to multiple TRPs in the multi-TRP scenario, so that subsequent targeted operations can be performed when radio link failure (RLF) occurs in different cells , to ensure data transmission.

In a possible design, when it is determined that RLF does not occur in the serving cell and RLF occurs in the first cell, a first message is sent to the first access network device, and the first message is used to notify the RLF occurs in the first cell. In this way, the data transmission in the serving cell can be guaranteed, and at the same time, the data transmission in the first cell can be transferred to the serving cell, so as to ensure the original data transmission in the first cell.

In a possible design, the first message includes one or more of the following information: the identifier of the first cell, the identifier of the second TRP, the PCI of the first cell, the The cause of RLF in a cell, the beam-level measurement result of the reference signal of the first TRP, the cell-level measurement result of the reference signal of the first TRP, the beam-level measurement result of the reference signal of the second TRP, the The cell-level measurement result of the reference signal of the second TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein, the PCI corresponding to the third TRP is the same as The PCIs corresponding to the first TRP and the second TRP are different.

In a possible design, when it is determined that RLF does not occur in the serving cell and RLF occurs in the first cell, the method further includes: performing a first operation, wherein the first operation may include any of the following or more: deactivate the first cell (or the second TRP); release the resources occupied by the first cell (or the second TRP); delete the first cell (or the second TRP) configuration information; do not monitor (or monitor) the physical downlink control channel (physical downlink control channel, PDCCH) of the first cell (or the second TRP); the beam for the first cell fails, if If no candidate beam available to the first cell is identified, a beam failure recovery request is not sent; perform radio link monitoring (RLM) on the first cell (or the second TRP), and determine the whether the radio link of the first cell (or the second TRP) is restored; do not perform RLM on the first cell (or the second TRP); or increase and/or activate the transmission of the fourth TRP, The third TRP includes the fourth TRP. When the terminal device does not send a beam failure recovery request, the uplink transmission load can be reduced; the terminal device performs RLM on the first cell to determine whether the wireless link of the first cell is restored, and the wireless link of the first cell can When recovering, the data transmission of the first cell is resumed in time; by increasing and/or activating the transmission of the fourth TRP by the terminal equipment, the terminal equipment can communicate with the fourth TRP to ensure data transmission.

In a possible design, when the transmission of the fourth TRP is added and/or activated, a notification message may also be sent to the first access network device, where the notification message is used to notify that the transmission of the fourth TRP has been added and/or activated transmission of the fourth TRP. In this way, the first access network device can determine that the terminal device establishes communication with the fourth TRP.

In a possible design, the first message further includes the executed first operation. In this way, the first access network device can adjust the corresponding configuration according to the operation of the terminal device.

In a possible design, a first response message is received from the first access network device, the first response message is used to respond to the first message, and the first response message includes one of the following indication information One or more items: information instructing the terminal device to deactivate the first cell (or the second TRP); information instructing the terminal device to release resources occupied by the first cell (or the second TRP) ; Instruct the terminal device to delete the configuration information of the first cell (or the second TRP); or, instruct the terminal device to increase and/or activate the transmission information of the fourth TRP; wherein, the third The TRP includes the fourth TRP, and the PCI corresponding to the third TRP is different from the PCI corresponding to the first TRP and the second TRP. In this way, the terminal device can perform corresponding operations according to the instruction of the first access network device.

In a possible design, when the first response message includes information instructing the terminal device to deactivate the first cell, the first response message may further include a first duration and/or a second duration, the first duration The first duration is the duration for deactivating the first cell, and the second duration is the duration between the time when the first response message is received and the starting time for deactivating the first cell; when the first response message includes an instruction terminal When the device releases the resource information occupied by the first cell, the first response message may further include a third duration, which is the time between the time the first response message is received and the terminal device releasing the resources occupied by the first cell. The duration of the start moment. In this way, the terminal device can continue to perform RLM on the supplementary cell within the first duration and/or the second duration, or the terminal device can always perform RLM on the supplementary cell before releasing the supplementary cell, so as to determine the radio frequency of the first cell. Whether the link is restored.

In a possible design, when it is determined that the radio link of the first cell has recovered, a first recovery message may also be sent to the first access network device, and the first recovery message is used to notify the The radio link of the first cell has been restored. In this way, the data transmission of the first cell can be resumed subsequently.

In a possible design, the first recovery message includes one or more of the following information: the identifier of the first cell, the identifier of the second TRP, the PCI of the first cell, the radio link The cause of road recovery, the beam-level measurement result of the reference signal of the first TRP, the cell-level measurement result of the reference signal of the first TRP, the beam-level measurement result of the reference signal of the second TRP, the measurement result of the first TRP The cell-level measurement result of the reference signal of the second TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein, the PCI corresponding to the third TRP is the same as the The PCIs corresponding to the first TRP and the second TRP are different.

In a possible design, one or more of the following operations are performed: activating the first cell (or the second TRP); requesting the first access network device to increase the value of the second TRP transmission; resume monitoring the PDCCH of the first cell (or the second TRP); request the first access network device to increase the transmission of the second TRP; resume the first cell (or the second TRP) (2) the RLM process of the TRP); or, recovering the beam failure recovery request process of the first cell. In this way, data transmission between the first cell and the second TRP can be resumed.

In a possible design, a first recovery response message is received from the first access network device, the first recovery response message is used to respond to the first recovery message, and the first recovery response message may include the following One or more items of indication information: information indicating that the first recovery message is successfully received; information indicating activation of the first cell (or the second TRP); indicating that the first cell (or the second TRP) configuration information; or, information indicating to increase the transmission of the second TRP. In this way, the terminal device can perform a corresponding recovery operation according to the instruction of the first access network device.

In a possible design, when it is determined that RLF occurs in the serving cell and RLF does not occur in the first cell, a second message is sent to the second access network device, and the second message is used to notify the serving cell RLF occurs, and the second access network device is an access network device that manages radio resources of the first cell. In this way, the data transmission in the first cell can be guaranteed, and at the same time, the data transmission in the serving cell can be transferred to the first cell, so as to ensure the data transmission in the original serving cell.

In a possible design, the second message includes one or more of the following information: the identity of the serving cell, the identity of the first TRP, the PCI of the serving cell, the The cause of RLF, the beam-level measurement result of the reference signal of the second TRP, the cell-level measurement result of the reference signal of the second TRP, the beam-level measurement result of the reference signal of the first TRP, the first The cell-level measurement result of the reference signal of the TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein, the PCI corresponding to the third TRP is the same as that of the third TRP The PCIs corresponding to a TRP and the second TRP are different.

In a possible design, when it is determined that RLF occurs in the serving cell and RLF does not occur in the first cell, the method further includes: performing a second operation, and the second operation includes any one or more of the following : deactivating the serving cell (or the first TRP); releasing resources occupied by the serving cell (or the first TRP); deleting configuration information of the serving cell (or the first TRP); Not monitoring the PDCCH of the serving cell (or the first TRP); for the beam failure of the serving cell, if no candidate beam available for the serving cell is identified, a beam failure recovery request is not sent; for the performing RLM on the serving cell (or the first TRP), and judging whether the radio link of the serving cell (or the first TRP) is restored; not performing RLM on the serving cell (or the first TRP); or, handover to a second cell, and use the second cell as a serving cell, the second cell is the first cell or the first neighboring cell, and the PCI of the first neighboring cell is related to the serving cell and the The PCI of the first cell is different. When the terminal device does not send a beam failure recovery request, the uplink transmission load can be reduced; the terminal device performs RLM on the serving cell to determine whether the wireless link of the serving cell is restored, and when the wireless link of the serving cell is restored, The data transmission of the serving cell is resumed in time; the terminal device is switched to the second cell, and the second cell is used as the serving cell, so as to ensure that there is a cell serving the terminal device.

In a possible design, the second message further includes the executed second operation. In this way, the first access network device can adjust the corresponding configuration according to the operation of the terminal device.

In a possible design, a second response message is received from the second access network device, the second response message is used to respond to the second message, and the second response message includes one of the following indication information One or more items: information indicating that the second message is successfully received; information indicating that the terminal device deactivates the serving cell (or the first TRP); instructing the terminal device to release the information occupied by the serving cell (or the first TRP) Resource information; information instructing the terminal device to delete the configuration information of the serving cell (or first TRP); or information instructing the terminal device to switch to a second cell; the second cell is the first cell Or the first neighboring cell, where the PCI of the first neighboring cell is different from the PCIs of the serving cell and the first cell. In this way, the terminal device can perform corresponding operations according to the instruction of the first access network device.

In a possible design, when the second response message includes information instructing the terminal device to deactivate the serving cell, the second response message further includes a fourth duration and/or a fifth duration, and the fourth The duration is the duration for deactivating the serving cell, and the fifth duration is the duration between the moment when the second response message is received and the starting moment for deactivating the serving cell; when the second response message includes an instruction to the terminal device to release the serving cell For information about occupied resources, the second response message further includes a sixth duration, which is the duration from the moment the second response message is received to the initial moment when the terminal device releases the resources occupied by the serving cell. In this way, the terminal device may continue to perform RLM on the serving cell within the third time period and/or the fourth time period, or the terminal device may always perform RLM on the serving cell before releasing the serving cell, so as to determine the Whether the wireless link is restored.

In a possible design, when it is determined that the radio link of the serving cell has recovered, a second recovery message may also be sent to the first access network device or the second access network device, and the first The second restoration message is used to notify the serving cell that the radio link has been restored. In this way, the data transmission of the original serving cell can be resumed subsequently.

In a possible design, the second recovery message includes one or more of the following information: the identifier of the serving cell, the identifier of the first TRP, the PCI of the serving cell, and the radio link recovery The cause of the beam-level measurement result of the reference signal of the second TRP, the cell-level measurement result of the reference signal of the second TRP, the beam-level measurement result of the reference signal of the first TRP, the first TRP The cell-level measurement result of the reference signal of the third TRP, the beam-level measurement result of the reference signal of the third TRP or the cell-level measurement result of the reference signal of the third TRP; wherein, the PCI corresponding to the third TRP is the same as the first The TRP is different from the PCI corresponding to the second TRP.

In a possible design, perform one or more of the following operations: activate the serving cell (or the first TRP); resume monitoring the PDCCH of the serving cell (or the first TRP); report to the first access network device Or the second access network device requests to increase the transmission of the first TRP; the terminal device requests the configuration information of the serving cell (or the first TRP) from the first access network device or the second access network device; the terminal device Restoring the RLM process of the serving cell (or the first TRP); or, restoring the beam failure recovery request process of the serving cell. In this way, data transmission between the serving cell and the first TRP can be resumed.

In a possible design, a second recovery response message is received from the first access network device or the second access network device, the second recovery response message is used to respond to the second recovery message, and the second recovery message includes the following indication information One or more of: information indicating the successful reception of the second recovery message; information indicating the activation of the serving cell (or the first TRP); indicating the configuration information of the serving cell (or the first TRP); or indicating the addition of the first TRP information transmitted. In this way, the terminal device can perform a corresponding recovery operation according to the instruction of the first access network device or the second access network device.

In a possible design, the radio link restoration judgment configuration information is received from the first access network device, and the radio link restoration judgment configuration information includes one or more of the following: Layer link synchronization threshold, physical layer link out-of-sync threshold for judging RLF recovery, timer information for judging RLF recovery, counter information for judging RLF recovery, or Synchronization times. In this way, the terminal device can determine whether the radio link of the cell where the RLF occurs is restored.

In the second aspect, the present application provides a communication method, which is applied to the multi-transmission receiving point TRP transmission scenario, and the method can be applied to the first access network device, the processor, chip or a function in the first access network device modules etc. The method may include: generating radio link monitoring configuration information of the first TRP and radio link monitoring configuration information of the second TRP, and sending the radio link monitoring configuration information of the first TRP and the radio link monitoring configuration information of the second TRP to the terminal device Wireless link monitoring configuration information; wherein, the first TRP is an antenna or an antenna panel of the first access network device, and the first access network device is an access network device that manages radio resources of a serving cell, The second TRP corresponds to the first cell, the PCI of the serving cell is different from that of the first cell, and the terminal device communicates with the first TRP and the second TRP.

Through the above method, the terminal device can monitor the radio links of the cells corresponding to multiple TRPs in the multi-TRP scenario, so that subsequent targeted operations can be performed when RLF occurs in different cells to ensure data transmission.

In a possible design, a first message is received from the terminal device, where the first message is used to notify the first cell that RLF occurs. In this way, the data transmission in the serving cell can be guaranteed, and at the same time, the data transmission in the first cell can be transferred to the serving cell, so as to ensure the original data transmission in the first cell.

In a possible design, the first message further includes the first operation performed by the terminal device. In this way, the first access network device can adjust the corresponding configuration according to the operation of the terminal device.

In a possible design, the first operation performed by the terminal device includes one or more of the following: deactivating the first cell (or the second TRP); releasing the first cell (or resources occupied by the second TRP); delete the configuration information of the first cell (or the second TRP); do not monitor (or monitor) the PDCCH of the first cell (or the second TRP); For the beam failure of the first cell, if no candidate beam available to the first cell is identified, a beam failure recovery request is not sent; perform RLM on the first cell (or the second TRP), and determine Whether the radio link of the first cell (or the second TRP) is restored; RLM is not performed on the first cell (or the second TRP); or, the transmission of the fourth TRP is increased and/or activated , the third TRP includes the fourth TRP. When the terminal device does not send a beam failure recovery request, the uplink transmission load can be reduced; the terminal device performs RLM on the first cell to determine whether the wireless link of the first cell is restored, and the wireless link of the first cell can When recovering, the data transmission of the first cell is resumed in time; by increasing and/or activating the transmission of the fourth TRP by the terminal equipment, the terminal equipment can communicate with the fourth TRP to ensure data transmission.

In a possible design, a notification message is received from the terminal device, where the notification message is used to notify that the transmission of the fourth TRP has been added and/or activated. In this way, the first access network device can determine that the terminal device establishes communication with the fourth TRP.

In a possible design, a first response message is sent to the terminal device, the first response message is used to respond to the first message, and the first response message includes one or more of the following indication information : Instruct the terminal device to deactivate the information of the first cell (or the second TRP); instruct the terminal device to release the information occupied by the first cell (or the second TRP); instruct the terminal device Deleting the configuration information information of the first cell (or the second TRP); or, instructing the terminal device to increase and/or activate the transmission information of the fourth TRP; wherein, the third TRP includes the For the fourth TRP, the PCI corresponding to the third TRP is different from the PCI corresponding to the first TRP and the second TRP. In this way, the terminal device can perform corresponding operations according to the instruction of the first access network device.

In a possible design, when the first response message includes information instructing the terminal device to deactivate the first cell, the first response message may further include a first duration and/or a second duration, the first duration The first duration is the duration for deactivating the first cell, and the second duration is the duration between the time when the first response message is received and the starting time for deactivating the first cell; when the first response message includes an instruction terminal When the device releases the resource information occupied by the first cell, the first response message may further include a third duration, which is the time between the time the first response message is received and the terminal device releasing the resources occupied by the first cell. The duration of the start moment. In this way, the terminal device can continue to perform RLM on the supplementary cell within the first duration and/or the second duration, or perform RLM on the supplementary cell before releasing the supplementary cell, so as to determine the radio link of the first cell. Whether to restore.

In a possible design, a first restoration message is received from the terminal device, where the first restoration message is used to notify that the radio link of the first cell has been restored. In this way, the data transmission of the first cell can be resumed subsequently.

In a possible design, a first recovery response message is sent to the terminal device, the first recovery response message is used to respond to the first recovery message, and the first recovery response message may include the following indication information: One or more items: information indicating successful reception of the first recovery message; information indicating activation of the first cell (or the second TRP); indicating configuration of the first cell (or the second TRP) information; or, information indicating that the transmission of the second TRP is added. In this way, the terminal device can perform a corresponding recovery operation according to the instruction of the first access network device.

In a possible design, wireless link recovery judgment configuration information is sent to the terminal device, and the wireless link recovery judgment configuration information includes one or more of the following: a physical layer link synchronization gate for judging RLF recovery Limit value, physical layer link out-of-sync threshold for judging RLF restoration, timer information for judging RLF restoration, counter information for judging RLF restoration, or synchronization times for judging RLF restoration. In this way, the terminal device can determine whether the radio link of the cell where the RLF occurs is restored.

In a third aspect, the present application further provides a communication device, the communication device may be a terminal device, and the communication device has a function of implementing the method in the first aspect or each possible design example of the first aspect. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the communication device includes a transceiver unit and a processing unit, and these units can perform the corresponding functions in the above-mentioned first aspect or in each possible design example of the first aspect, for details, refer to Detailed description will not be repeated here.

In a possible design, the structure of the communication device includes a transceiver and a processor, and optionally also includes a memory, and the transceiver is used for sending and receiving data, and for communicating and interacting with other devices in the communication system, The processor is configured to support the communication device to execute corresponding functions in the first aspect or each possible design example of the first aspect. The memory, coupled to the processor, holds program instructions and data necessary for the communication device.

In a fourth aspect, the present application also provides a communication device, the communication device may be a first access network device, and the communication device has a method for realizing the above-mentioned second aspect or each possible design example of the second aspect Function. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the communication device includes a transceiver unit and a processing unit, and these units can perform the corresponding functions in the above-mentioned second aspect or in each possible design example of the second aspect. For details, refer to Detailed description will not be repeated here.

In a possible design, the structure of the communication device includes a transceiver and a processor, and optionally also includes a memory, and the transceiver is used for sending and receiving data, and for communicating and interacting with other devices in the communication system, The processor is configured to support the communication device to execute corresponding functions in the second aspect or each possible design example of the second aspect. The memory, coupled to the processor, holds program instructions and data necessary for the communication device.

In a fifth aspect, the embodiment of the present application provides a communication system, which may include the terminal device mentioned above, the first access network device, the second access network device, and the like.

In the sixth aspect, the embodiments of the present application provide a computer-readable storage medium, the computer-readable storage medium stores program instructions, and when the program instructions are run on the computer, the computer executes the first aspect and its In any possible design, or the method described in the second aspect and any possible design thereof. Exemplary, computer readable storage media may be any available media that can be accessed by a computer. Taking this as an example without limitation: computer readable media may include non-transitory computer readable media, random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable In addition to programmable read-only memory (electrically EPROM, EEPROM), CD-ROM or other optical disk storage, magnetic disk storage medium or other magnetic storage device, or can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media accessed by a computer.

In the seventh aspect, the embodiments of the present application provide a computer program product including computer program codes or instructions, which, when run on a computer, enable the computer to implement the above-mentioned first aspect or any possible design of the first aspect, or The method described in the above second aspect or any possible design of the second aspect.

In an eighth aspect, the present application also provides a chip, including a processor, the processor is coupled to a memory, and is used to read and execute program instructions stored in the memory, so that the chip realizes the above first aspect Or any possible design of the first aspect, or the method described in the above second aspect or any possible design of the second aspect.

For the various aspects in the above-mentioned third to eighth aspects and the possible technical effects of each aspect, please refer to the above-mentioned aspects for the first aspect or various possible solutions in the first aspect, or the second aspect or various possible solutions in the second aspect. The description of the technical effect that may be achieved by the scheme will not be repeated here.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system provided by the present application;

FIG. 2 is a flowchart of a communication method provided by the present application;

FIG. 3 is a flowchart of another communication method provided by the present application;

FIG. 4 is a flowchart of another communication method provided by the present application;

FIG. 5 is a schematic structural diagram of a communication device provided by the present application;

FIG. 6 is a structural diagram of a communication device provided in the present application.

Detailed ways

Embodiments of the present application provide a communication method and device, which are used to implement wireless link monitoring on cells corresponding to multiple TRPs in a multi-TRP transmission scenario. Wherein, the method and the device described in this application are based on the same technical concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

In the description of the present application, terms such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

In the description in this application, "at least one (species)" refers to one (species) or multiple (species), and multiple (species) refers to two (species) or more than two (species).

In order to describe the technical solutions of the embodiments of the present application more clearly, the communication method and device provided in the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

The communication method of the embodiment of the present application can be applied to various communication systems, such as universal mobile telecommunications system (universal mobile telecommunications system, UMTS), code division multiple access (code division multiple access, CDMA) system, wireless local area network (wireless local area network) , WLAN), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), fifth generation (5th generation, 5G) A mobile communication system or a new radio (new radio, NR) system, or a communication system applied in the future (such as a sixth generation (6th Generation, 6G) system) or other similar communication systems, etc.

For example, FIG. 1 shows a schematic structural diagram of a communication system to which the communication method according to the embodiment of the present application is applicable. The communication system may include access network devices (for example, access network device 1, access network device 2, and access network device 3 in FIG. 1 ) and terminal devices. Wherein, the terminal device is located within the coverage of one or more cells (carriers) provided by the access network device, and there may be one or more cells serving the terminal device. When there are multiple cells serving the terminal device, the terminal device can use carrier aggregation (CA) or dual connectivity (DC) or coordinated multiple points transmission/reception (CoMP) Work. Wherein, at least one cell among the plurality of cells serving the terminal device is used to provide more than one transmission parameter set (numerology) to provide radio resources for the terminal device. For example, as shown in FIG. 1 , the terminal device is located in the cell of the access network device 1 , the cell of the access network device 2 , and the cell of the access network device 2 at the same time. Wherein, the access network device 1 may be a macro base station (such as a macro eNB), and the access network device 2 and the access network device 3 may be micro base stations (such as a small eNB).

Among them, terminal equipment, also known as user equipment (UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc., is a device that provides voice and/or data connectivity to users. . For example, handheld devices with wireless connectivity, vehicle-mounted devices, etc. At present, examples of some terminals can be: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) device, augmented Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid wireless terminals in transportation safety (transportation safety), wireless terminals in smart city (smart city), wireless terminals in smart home (smart home), etc., can also be chips or Chip module (or chip system), etc. The embodiments of the present application do not limit the application scenarios. In this application, a terminal device with a wireless transceiver function and a chip that can be installed in the aforementioned terminal device are collectively referred to as a terminal device.

An access network device refers to a wireless access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network, and may also be called a base station. At present, some examples of RAN nodes can be: next generation node B (generation node B, gNB), evolved node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit , BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc.

In addition, in a network structure, the access network device may be a RAN device including a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a CU node and a DU node. The RAN equipment including the CU node and the DU node separates the protocol layer of the eNB in the LTE system, and the functions of some protocol layers are placed under the centralized control of the CU, and the remaining part or all of the functions of the protocol layer are distributed in the DU and centralized by the CU. Control DUs. For example, in some deployments, a gNB may include CUs and DUs. The gNB may also include a radio unit (radio unit, RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer functions, DU implements wireless link Functions of the radio link control (radio link control, RLC), media access control (media access control, MAC) and physical (physical, PHY) layers.

It should be noted that the devices shown in the communication system shown in FIG. 1 are only examples, and may also include other types of devices, such as core network devices, which will not be shown in this application.

It should be noted that the number of devices shown in the communication system shown in FIG. 1 is only an example, and it should be understood that more or fewer devices may be included, which is not limited in the present application.

In order to better understand the communication method provided by the embodiment of the present application, the terms involved in the present application are briefly explained first.

1. TRP: A network node that can be used to implement reception and/or transmission. The network node used for sending may also be called a transmission point (TP), and the network node used for receiving may also be called a reception point (RP). In this embodiment of the present application, multiple TRPs can be understood as multiple geographically separated antennas or antenna panels of an access network device (such as a base station), to achieve reception and/or transmission from different geographical locations with different beam directions. The function of the wireless signal.

2. Cell: A cell is described from the perspective of resource management or mobility management or a service unit. The coverage of each access network device can be divided into one or more cells, and each cell can correspond to one or more frequency points, or in other words, each cell can be regarded as the coverage of one or more frequency points The area formed by the range.

It should be noted that a cell may be an area within the coverage of the wireless network of the access network device. In this embodiment of the present application, different cells may correspond to the same or different access network devices.

It should be understood that a cell is a coverage area of an access network device (such as a base station).

Each cell may include one or more TRPs, and in the cell, a terminal device may perform data transmission with one or more TRPs, that is, a terminal device may perform single TRP transmission or multiple TRP transmissions in the cell. Wherein, performing multiple TRP transmissions in a cell may be understood as configuring multiple sets of communication resources for the cell. Exemplarily, the above communication resources may be air space resources, such as beams. Alternatively, the terminal device performing data transmission with multiple TRPs may also be understood as the terminal device communicating with multiple network nodes implementing receiving and/or sending functions.

3. Serving cell: In order to communicate with the access network device, the terminal device needs to establish a wireless connection with the cell controlled by the access network device. The cell that has established a wireless connection with the terminal device can be called the serving cell of the terminal device.

Some technologies related to this application are explained below:

1. Beam failure recovery (BFR) technology in multi-TRP transmission.

(1) Beam failure detection

The terminal device measures the downlink reference signal. When the measurement results of all the reference signals in the configured monitoring reference signal set (RadioLinkMonitoringRS) are less than the configured threshold value, it is considered that a beam failure instance (beam failure instance) has occurred, and the physical layer sends the beam failure instance to Failed instances are reported to the MAC layer;

When the medium access control (MAC) layer receives a beam failure instance reported by the physical layer, it adds 1 to the value of the beam failure instance counter (BFI_Counter), and starts or restarts the beam failure detection timer (beamFailureDetectionTimer) , before the expiration of the beam failure detection timer, if the value of the beam failure instance counter is greater than or equal to the configured maximum number of times (BeamFailureInstanceMaxCount), the terminal device considers that a beam failure has occurred. It should be noted that when the beam failure detection timer expires, the beam failure instance counter will be cleared.

In an mTRP scenario, for example, in an intra-cell multi-TRP (inter-cell mTRP) scenario, the terminal device may perform beam failure detection on each TRP respectively.

(2) New beam identification

The high-level signaling configures the candidate beam reference signal set (candidateBeamRSList). Each reference signal corresponds to a beam direction. The physical layer of the terminal device measures the reference signals in the set. When the measurement result is higher than the corresponding threshold value, the physical The layer reports the reference signal information to the MAC layer, and considers that a candidate beam is detected.

In an mTRP scenario, such as an inter-cell mTRP scenario, the terminal device identifies whether the TRP has an available candidate beam for a TRP that fails a beam.

(3) beam failure recovery request

If beam failure occurs in a special cell (SpCell) (including primary cell (PCell) and primary secondary cell (PSCell), or only PCell), and all TRPs in the SpCell are When a beam failure occurs, the terminal device initiates a beam failure recovery request (beam failure recovery request, BFRQ) through random access; if a beam failure occurs in some TRPs in the SpCell, the terminal device sends a BFR media access control A beam failure recovery request is initiated by means of a medium access control control element (MAC CE). The BFR MAC CE carries the information of the serving cell where the beam failure occurred, the TRP information of the beam failure, whether the candidate beam is identified, and if it is identified To the candidate beam, the BFR MAC CE also carries the information of the candidate beam.

If beam failure occurs in SCell, no matter whether all TRPs in the SCell have beam failure, a beam failure recovery request is sent by sending BFR MAC CE, which carries the information of the serving cell where beam failure occurred , the TRP information of the beam failure, whether the candidate beam is identified, if the candidate beam is identified, the BFR MAC CE also carries the candidate beam information.

(4) beam failure recovery response

If the terminal device initiates the beam failure recovery request through random access, when the random access is successfully completed, it is considered to have received the response message of beam recovery success, and the response message of random access completion will be used as the response message of beam failure recovery .

If the terminal device sends a beam failure recovery request initiated by the BFR MAC CE, the access network device sends the physical downlink control channel (physical downlink) scrambled by the cell radio network temporary identifier (C-RNTI) control channel, PDCCH), and the PDCCH indicates newly transmitted uplink scheduling information as a response message for beam failure recovery.

If the terminal device does not receive a beam failure recovery response message, the terminal device may trigger a beam failure again and send a beam failure recovery request.

2. Radio link failure (RLF) detection

The terminal device performs radio link monitoring (radio link monitoring, RLM) on the SpCell, and determines whether RLF occurs at the radio resource control (radio resource control, RRC) layer. When any of the following situations occurs, the terminal device considers that RLF has occurred: (1) physical layer link problem; (2) random access problem; (3) radio link control (radio link control, RLC) layer retransmission The maximum number of times is exceeded; (4) Continuous uplinking of listen before e talk (LBT) fails. Since this application involves RLF caused by a physical layer link problem, the following describes the process of triggering RLF due to a physical layer link problem and the behavior of the terminal device after the RLF occurs.

The access network device configures the radio link monitoring reference signal set to the terminal device, and configures a threshold value for judging synchronization or out of synchronization. When the physical layer of the terminal device judges that the link quality of all reference signals in the above set is less than the out-of-synchronization threshold, it will indicate an out-of-synchronization to the RRC layer. When the physical layer of the terminal device judges that the link quality of any reference signal in the above set is greater than the synchronization threshold, it will indicate a synchronization to the RRC layer.

After receiving N310 out-of-synchronization indications of the physical layer in a row, the terminal device starts the T310 timer. When the T310 timer expires, the terminal device considers that RLF has occurred; Stop the T310 timer. Wherein, N310 and N311 are respectively the threshold values of synchronization and out-of-synchronization times configured by the access network device. The initial timing value of the T310 timer is configured by the access network device.

When the terminal device determines that RLF occurs, it will initiate an RRC re-establishment process.

Currently, in a multi-TRP transmission scenario, multiple TRPs communicating with a terminal device may correspond to different physical cell identities (PCI). The multiple TRPs may correspond to at least one serving cell and at least one auxiliary cell, and the PCIs of the at least one serving cell and the at least one auxiliary cell are different. For the above multi-TRP transmission scenario, the existing wireless link monitoring technology cannot identify which TRP and its associated cell has RLF, and cannot accurately perform the wireless link recovery process. Based on this, the present application proposes a communication method to clarify how to perform wireless link monitoring on multiple TRPs in the above multiple TRP transmission scenario.

It should be noted that in the embodiment of the present application, the wireless link monitoring can be realized by the terminal device, or the processor in the terminal device, or a chip or a chip system, or a functional module, etc.; interacting with the terminal device It may be an access network device, or a processor in the access network device, or a chip or a chip system, or a functional module. In the following embodiments, the communication method provided by the present application is described in detail by taking the terminal device and the access network device as an example as the execution subjects, but this application is not limited thereto.

Based on the above description, the communication method provided by the embodiment of the present application is applicable to the communication system shown in FIG. 1 . Referring to shown in Figure 2, the specific process of the method may include:

Step 201: The first access network device generates radio link monitoring configuration information of the first TRP and radio link monitoring configuration information of the second TRP, wherein the terminal device communicates with the first TRP and the second TRP.

Specifically, the first TRP may be understood as an antenna or antenna panel of the first access network device, and the second TRP may be understood as an antenna or antenna panel of the second access network device. The first access network device is the access network device that manages the radio resources of the serving cell, and it can also be said that the serving cell belongs to the first access network device, and the second access network device is the access network device that manages the radio resources of the first cell. The network access device, it can also be said that the first cell belongs to the second access network device, and the PCI of the serving cell is different from that of the first cell. Furthermore, it can be said that the first TRP corresponds to the serving cell, and the second TRP corresponds to the first cell.

Wherein, the first cell may also be called an assistant cell (assistant cell). In the following description, the assistant cell is used as an example for illustration. It should be understood that this application does not limit the name of the first cell.

It should be noted that the communication with the terminal device is not limited to the first TRP and the second TRP, and there may be other multiple TRPs. Other multiple TRPs may respectively correspond to the serving cell and the auxiliary cell. That is, the terminal device may have one or more serving cells, and one or more auxiliary cells. For the convenience of description, this application uses two TRPs, the first TRP and the second TRP, as examples, that is, only one serving cell An auxiliary cell is taken as an example for description.

Optionally, the first access network device and the second access network device may be the same or different. When the first access network device and the second access network device are the same, the serving cell and the auxiliary cell belong to the same access network device, and the first TRP and the second TRP can be understood as the same access network device in Antennas or antenna panels in different geographic locations, the first TRP and the second TRP may use different beam directions to communicate with the terminal device. When the first access network device and the second access network device are different, the serving cell and the auxiliary cell belong to different access network devices, and the first TRP and the second TRP belong to antennas or antennas of different access network devices panel.

In an optional implementation manner, when the serving cell and the auxiliary cell belong to different access network devices, that is, the first access network device and the second access network device are different. The first access network device may receive the radio link monitoring configuration information of the second TRP from the second access network device, and locally determine the radio link monitoring configuration information of the first TRP. It should be understood that when there are other auxiliary cells, and the access network devices to which the other auxiliary cells belong are different from the first access network device and the second access network device, the first access network device also uses the The access network device receives radio link monitoring configuration information of TRPs corresponding to other auxiliary cells.

In another optional implementation manner, when the serving cell and the auxiliary cell belong to the same access network device, that is, the first access network device and the second access network device are the same access network device equipment. The first access network device may locally determine the radio link monitoring configuration information of the first TRP and the radio link monitoring configuration information of the second TRP.

Exemplarily, the wireless link monitoring configuration information of the first TRP may include one or more of the following: the wireless monitoring reference signal set of the first TRP, the physical layer link synchronization threshold of the first TRP, the The physical layer link out-of-sync threshold, the counter information of the first TRP recording the physical layer link synchronization indication, the counter information of the first TRP recording the physical layer link out-of-sync indication, the timer of the first TRP to determine whether RLF occurs Information, or the number of out-of-synchronization indications for determining that RLF occurs; the wireless link monitoring configuration information of the second TRP may include one or more of the following: the wireless monitoring reference signal set of the second TRP, the physical layer link of the second TRP The synchronization threshold value, the physical layer link out-of-sync threshold of the second TRP, the counter information of the second TRP recording the physical layer link synchronization indication, the counter information of the second TRP recording the physical layer link out-of-sync indication, and the second TRP The timer information of TRP to determine whether RLF occurs, or the value of out-of-synchronization indication times to determine RLF occurs.

The radio link monitoring configuration information of the first TRP may be included in the configuration information of the serving cell; the radio link monitoring configuration information of the second TRP may be included in the configuration information of the auxiliary cell. In some possible scenarios, the configuration information of the second TRP may be regarded as a part of the configuration information of the serving cell, that is, the configuration information of the serving cell includes the radio link monitoring configuration information of the first TRP and the second TRP. The solution of this application does not limit whether the configuration information of the second TRP is included in the configuration information of the serving cell or the configuration information of the auxiliary cell. In the description of this application, the configuration information of the second TRP is included in the configuration information of the auxiliary cell. example to illustrate.

Optionally, the configuration information of the serving cell may also include radio link recovery judgment configuration information for the first TRP, and the configuration information of the auxiliary cell may also include radio link recovery judgment configuration information for the second TRP. For example, the radio link recovery judgment configuration information may include one or more of the following: the physical layer link synchronization threshold used to judge RLF recovery, the physical layer link out-of-sync threshold used to judge RLF recovery, Timer information for judging RLF restoration, counter information for judging RLF restoration, or synchronization times for judging RLF restoration.

It should be noted that the information included in the radio link recovery judgment configuration information for the first TRP may or may not be the same as the corresponding information included in the radio link monitoring configuration information of the first TRP. For example, the physical layer link synchronization threshold for judging RLF recovery may be the same as the physical layer link synchronization threshold of the first TRP, and the same applies to other information, which will not be listed here. Similarly, the information included in the radio link recovery judgment configuration information for the second TRP may or may not be the same as the corresponding information included in the radio link monitoring configuration information of the second TRP. Optionally, when they are the same, the configuration information of the serving cell and the configuration information of the auxiliary cell may not include radio link recovery judgment configuration information, and the terminal device can monitor the configuration information through the radio link of the first TRP and the configuration information of the second TRP. The wireless link monitoring configuration information determines whether the RLF is recovered, which is not limited in this application. Optionally, the configuration information of the serving cell may also include one or more of the following: synchronization signal and physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB) configuration, channel state information reference signal (channel state information reference signal , CSI-RS) configuration, transmission configuration indication status ((transmission configuration indication, TCI) states) configuration, or PCI. The configuration information of the auxiliary cell may also include one or more of the following: SSB configuration, CSI-RS configuration, TCI state configuration, or PCI.

Step 202: The first access network device sends the radio link monitoring configuration information of the first TRP and the radio link monitoring configuration information of the second TRP to the terminal device; that is, the terminal device receives the first TRP from the first access network device. The wireless link monitoring configuration information of the TRP and the wireless link monitoring configuration information of the second TRP.

Optionally, the first access network device may also send the wireless link recovery judgment configuration information mentioned in step 201 to the terminal device.

Exemplarily, the first access network device may send the radio link monitoring configuration information of the first TRP by sending the configuration information of the serving cell to the terminal device, and send the second TRP by sending the configuration information of the auxiliary cell to the terminal device configuration information of wireless link monitoring. Specifically, for the configuration information of the serving cell and the configuration information of the auxiliary cell, reference may be made to related descriptions in step 201 .

It should be noted that when the radio link monitoring configuration information of the second TRP has the same value as the radio link monitoring configuration information of the first TRP, the configuration information of the auxiliary cell may not include the For part of the configuration information, the terminal device may refer to the corresponding information of the radio link monitoring information of the first TRP in the configuration information of the serving cell to determine the radio link monitoring configuration information of the second TRP. Similarly, when the radio link recovery judgment configuration information of the second TRP has the same value as the radio link recovery judgment configuration information of the first TRP, the configuration information of the auxiliary cell may not include the configuration information with the same value. For part of the configuration information, the terminal device may refer to the corresponding information of the radio link recovery judgment configuration information of the first TRP in the configuration information of the serving cell to determine the radio link recovery judgment configuration information of the second TRP.

It should be noted that, when there are multiple serving cells and multiple auxiliary cells, the first access network device also sends configuration information of other serving cells and configuration information of other auxiliary cells to the terminal device. Among them, the configuration information of other serving cells is similar to the configuration information of the serving cell involved in step 201, but the corresponding TRP is different; the configuration information of other auxiliary cells is similar to the configuration information of the auxiliary cell involved in step 201, but the corresponding TRP is different.

In an optional implementation manner, as shown in FIG. 2, after step 202 and before step 203, the terminal device also performs the following steps 202a and 202b:

Step 202a: the terminal device performs cell measurement.

Exemplarily, the terminal device respectively measures the reference signal of at least one serving cell according to the received configuration information of at least one serving cell, for example, performs beam-level granularity measurement, and respectively measures the reference signal according to the received configuration information of at least one auxiliary cell The reference signal of at least one auxiliary cell is measured, for example, beam-level granularity is measured.

Step 202b: the terminal device sends the cell measurement result to the first access network device.

Exemplarily, the terminal device sends the cell measurement result of at least one serving cell and the cell measurement result of at least one auxiliary cell (eg, beam-level granularity measurement results) obtained in step 202a to the first access network device.

After the first access network device receives the measurement results of each cell, perform step 202c: the first access network device sends a multi-TRP transmission message to the terminal device, and the multi-TRP transmission message is used to notify the terminal device to communicate with multiple TRPs , such as inter-cell multi-TRP (inter-cell mTRP) transmission. Afterwards, the terminal device communicates with multiple TRPs, that is, performs uplink and downlink data transmission with multiple TRPs, that is, performs uplink and downlink data transmission with multiple access network devices, as shown in step 202d in FIG. 2 . It should be noted that part or all of the multiple TRPs may correspond to the same access network device, and FIG. 2 only shows that the first TRP and the second TRP correspond to different access network devices as an example.

Wherein, the terminal device communicates with multiple TRPs may be understood as the terminal device communicates through multiple sets of communication resources. Optionally, the foregoing communication resources may be airspace resources, such as beams.

Exemplarily, the first access network device determines the cell whose signal quality is greater than a certain threshold according to the cell measurement result in step 202b, and then determines that the terminal device can communicate with the TRP corresponding to the determined cell. It should be noted that, in the following description of the present application, the terminal device communicates with the first TRP and the second TRP as an example.

Optionally, the multi-TRP transmission message may include an identifier of at least one auxiliary cell (eg PCI of the auxiliary cell), and a beam direction (eg TCI state) used by the terminal device in the at least one auxiliary cell.

Optionally, the multiple TRP transmission messages can be physical layer messages (also referred to as layer 1 (layer 1, L1) messages), such as PDCCH messages; or the multiple TRP transmission messages can be MAC layer messages (also can be Called layer 2 (layer 2, L2) message), such as MAC CE message.

Step 203: The terminal device performs radio link monitoring on the serving cell according to the radio link monitoring configuration information of the first TRP, and performs radio link monitoring on the auxiliary cell according to the radio link monitoring configuration information of the second TRP.

Exemplarily, the terminal device performs radio link monitoring on the serving cell according to the radio link monitoring configuration information of the first TRP, and determines whether RLF occurs in the serving cell; and performs radio link monitoring on the auxiliary cell according to the radio link monitoring configuration information of the second TRP. Link monitoring, to determine whether RLF occurs in the auxiliary cell. Optionally, the terminal device determines that RLF has occurred in the serving cell or the auxiliary cell. The specific method may be: the terminal device determines that the physical layer link quality of the serving cell or the auxiliary cell is lower than the corresponding out-of-sync threshold step, and determine that a synchronization occurs after judging that the quality of the physical layer link of the serving cell or the auxiliary area is higher than the corresponding synchronization threshold value; after the terminal device determines that the first preset number of out-of-synchronization occurs continuously, the first timer is started, And stop the operation of the first timer after determining that the second preset number of synchronizations have occurred continuously; when the terminal device determines that the first timer times out, determine that RLF occurs in the serving cell or the auxiliary cell.

Optionally, the process of the terminal device judging the serving cell or the auxiliary cell for RLF occurrence may be completed jointly by the physical layer and the RRC layer of the terminal device. Exemplarily, the specific process may be as follows: the physical layer of the terminal device respectively measures the physical layer link quality of different cells, and compares them with the synchronization thresholds and out-of-synchronization thresholds corresponding to each cell, wherein the corresponding The synchronization thresholds can be the same or different. Similarly, the out-of-synchronization thresholds corresponding to each cell can be the same or different. This application does not limit this; the RRC layer of the terminal device reports the synchronization indication of different cells on the physical layer Or out of step indication, counting and start/stop timer operation respectively.

For example, for the serving cell: after the physical layer of the terminal device judges that the link quality of the physical layer of the serving cell is lower than the out-of-sync threshold value corresponding to the serving cell, it sends an out-of-sync indication to the RRC layer of the terminal device, and the physical layer judges that the serving cell After the physical layer link quality of the service cell is higher than the synchronization threshold value corresponding to the serving cell, a synchronization indication is sent to the RRC layer; the RRC layer determines that the first preset number of out-of-synchronization indications has been received continuously, and then the first timer is started, and the continuous Stopping the operation of the first timer after receiving the second preset number of synchronization instructions; when the RRC layer determines that the first timer expires, it determines that RLF occurs in the serving cell.

Another example, for the auxiliary cell: the physical layer of the terminal device judges that the physical layer link quality of the auxiliary cell is lower than the out-of-synchronization threshold value corresponding to the auxiliary cell, and then sends an out-of-synchronization indication to the RRC layer of the terminal device, and the physical layer judges the auxiliary cell After the physical layer link quality of the cell is higher than the synchronization threshold value corresponding to the auxiliary cell, a synchronization indication is sent to the RRC layer; the RRC layer determines that the first preset number of out-of-synchronization indications has been continuously received, and the first timer is started, and the determination Stopping the operation of the first timer after continuously receiving the synchronization indication for the second preset number of times; when the RRC layer determines that the first timer expires, it determines that RLF occurs in the secondary serving cell.

Optionally, the out-of-sync indication corresponding to the serving cell may include the identity of the serving cell, or the PCI of the serving cell, or the identity of the corresponding TRP; the synchronization indication of the serving cell may include the identity of the serving cell, or the identity of the serving cell. The identification of the PCI, or the corresponding TRP. The out-of-synchronization indication corresponding to the auxiliary cell may include the identification of the auxiliary cell, or the PCI of the auxiliary cell, or the identification of the corresponding TRP; the synchronization indication of the auxiliary cell may include the identification of the auxiliary cell, or the PCI of the auxiliary cell, or the corresponding ID of the TRP.

It should be noted that, in the above two examples, the threshold of out-of-synchronization times of the serving cell and the threshold of out-of-synchronization times of the auxiliary cell are the same, both of which are the first preset times, and the threshold of synchronization times of the serving cell and the number of synchronization times of the auxiliary cell are the same. The thresholds are the same, both are the second preset times, and the countdown start values of the timers corresponding to the serving cell and the auxiliary cell are both the countdown start values of the first timer as an example for illustration. It should be understood that the above parameters of the serving cell and the auxiliary cell may be different. For example, the out-of-sync threshold of the serving cell can be configured as N310a (for example, 4 times), the synchronization threshold can be configured as N311a (for example, 3 times), and the countdown start value of the timer corresponding to the serving cell can be It is configured as T310a (for example, it can be 1000 milliseconds); the out-of-synchronization threshold of the auxiliary cell can be configured as N310b (for example, it can be 6 times), and the synchronization frequency threshold can be configured as N311b (for example, it can be 5 times). The corresponding timer can be configured as T310b (for example, it can be 500 milliseconds). It should be understood that the times listed above or the names of the timers are only examples, and other names may also be used instead.

In some embodiments, the principle of the RLF judgment process of other serving cells or other auxiliary cells is the same as that of the above-mentioned RLF judgment processes of the serving cell and auxiliary cells, which can be referred to each other.

It should be noted that, in the description of the above process, the description of performing radio link monitoring on a cell (such as a serving cell or an auxiliary cell) may also be described as performing radio link monitoring on a TRP (such as a first TRP, a second TRP). Road monitoring, etc., which are not limited in this application.

Through the above process, the terminal device can determine which cells have RLF occurred and which cells have not occurred RLF. Depending on the cell where RLF occurs, the following three different scenarios may be included:

Scenario a1: After the terminal device determines that RLF occurs in all cells, that is, all serving cells and all auxiliary cells, that is, all TRPs in the multi-TRP transmission scenario have RLF, the terminal device initiates an RRC re-establishment process.

Scenario a2: When the terminal device determines that RLF does not occur in the serving cell and RLF occurs in some or all auxiliary cells, the terminal device executes step 204a in the process shown in FIG. 3 .

Scenario a3: When the terminal device determines that RLF has occurred in the serving cell and that RLF has not occurred in at least one auxiliary cell, the terminal device performs step 204b in the process shown in FIG. 4 .

The processes in scenario a2 and scenario a3 are described in detail below respectively.

The scenario a2 is described below in combination with FIG. 3 :

Exemplarily, in scenario a2, two cells, a serving cell corresponding to the first TRP and a secondary cell corresponding to the second TRP, exist as an example for illustration. The scenarios of multiple serving cells and multiple auxiliary cells have the same principle and can be referred to each other.

When the terminal device determines that RLF does not occur in the serving cell and that RLF occurs in the auxiliary cell, the terminal device executes step 204a shown in Figure 3: the terminal device sends a first message to the first access network device, and the first message is used to notify the auxiliary cell that RLF has occurred RLF.

Exemplarily, the terminal device sends the first message to the first access network device, specifically through physical layer signaling such as a physical uplink control channel (physical uplink control channel, PUCCH) message, or through a physical uplink data channel ( The physical uplink data channel (PUSCH) is multiplexed with uplink control information (uplink control information, UCI), or sent through MAC CE, or sent through RRC messages, or sent through other uplink messages. The sending of the above first message is not limited.

In an optional implementation manner, the first message may include one or more of the following information: the identity of the auxiliary cell, the identity of the second TRP, the PCI of the auxiliary cell, the reason for RLF occurring in the auxiliary cell (such as physical layer link problem), the beam-level measurement results of the reference signal of the first TRP, the cell-level measurement results of the reference signal of the first TRP, the beam-level measurement results of the reference signal of the second TRP, the cell-level measurement results of the reference signal of the second TRP Level measurement results, beam-level measurement results of the reference signal of the third TRP, or cell-level measurement results of the reference signal of the third TRP; wherein, the PCI corresponding to the third TRP is different from the PCI corresponding to the first TRP and the second TRP, where The third TRP may be one or more TRPs, and the third TRP may correspond to one or more cells. Wherein, one or more cells corresponding to the third TRP may be neighboring cells of the serving cell, and it should be understood that these neighboring cells corresponding to the third TRP do not include auxiliary cells.

It should be noted that, in the scenario of multiple auxiliary cells, when RLF occurs in other auxiliary cells, the first message above also includes information about other auxiliary cells, such as the identity of any other auxiliary cell, any other auxiliary cell The identifier of the TRP corresponding to the cell, the PCI of any other auxiliary cell, the cause of RLF in any other auxiliary cell, the beam-level measurement result of the reference signal of the TRP corresponding to any other auxiliary cell or the cell-level measurement result of the reference signal.

Optionally, after step 204a, the terminal device further performs step 206a: the terminal device performs a first operation, where the first operation may include any one or more of the following:

The terminal device deactivates (deactivate) the auxiliary cell (or the second TRP);

The terminal device releases (releases) resources occupied by the auxiliary cell (or the second TRP);

The terminal device deletes (deletes) the configuration information of the secondary cell (or the second TRP);

not monitoring (or monitoring) the PDCCH of the secondary cell (or the second TRP);

For the beam failure of the auxiliary cell (or the second TRP), if no candidate beam available for the auxiliary cell (or the second TRP) is identified, the terminal device does not send a beam failure recovery request, for example, the terminal device does not send a BFR MAC CE;

The terminal device performs RLM on the auxiliary cell (or the second TRP), and judges whether the radio link of the auxiliary cell (or the second TRP) is restored;

The terminal device does not perform RLM on the auxiliary cell (or the second TRP); or

The terminal device adds (adds) and/or activates (activates) the transmission of the fourth TRP, where the third TRP includes the fourth TRP.

Exemplarily, when the above-mentioned first operating terminal device does not monitor the PDCCH of the secondary cell (or the second TRP), the terminal device may not monitor the PDCCH even during the active period of discontinuous reception (DRX) in the RRC connected state. PDCCH of the secondary cell (or the second TRP).

Wherein, through the above-mentioned first operation for the beam failure of the auxiliary cell (or the second TRP), if no candidate beam available for the auxiliary cell (or the second TRP) is identified, the terminal device does not send a beam failure recovery request, and the terminal device can Reduce unnecessary BFR MAC CE reporting and reduce uplink transmission load.

It should be noted that when there are multiple supplementary cells and RLF occurs in other supplementary cells, the terminal device also performs the above operation for the other supplementary cells in which RLF occurs, which will not be described in detail in this application.

In an optional implementation manner, the terminal device may directly perform the above step 206a after performing step 204a, wherein, when the terminal device directly performs the above step 206a after performing step 204a, and the terminal device adds and/or activates the fourth During the transmission of the TRP, the terminal device sends a notification message to the first access network device, where the notification message is used to notify that the transmission of the fourth TRP has been added and/or activated. Optionally, the third TRP may include a fourth TRP, that is, the fourth TRP may be one of the third TRPs, for example, the TRP with the best signal quality.

Exemplarily, when the terminal device directly performs the foregoing step 206a after performing step 204a, the first message may further include the foregoing first operation performed by the terminal device.

In another optional implementation, the terminal device may also perform step 260a after step 205a described below. Specifically, step 205a: the first access network device sends a first response message to the terminal device, the first response message is used to respond to the above-mentioned first message, and the first response message may include one or more of the following indication information :

Information indicating the successful reception of the first message, for example, may be indicated by 1-bit acknowledgment (acknowledgment character, ACK) information;

Instructing the terminal device to deactivate the information of the auxiliary cell (or the second TRP);

Instructing the terminal device to release the information of resources occupied by the auxiliary cell (or the second TRP);

Instructing the terminal device to delete (delete) information about the configuration information of the secondary cell (or the second TRP); or

Information instructing the terminal device to increase and/or activate the transmission of the fourth TRP.

That is to say, the first access network device instructs the terminal device to perform the first operation through the indication information of the first response message, that is, the terminal device performs the first operation according to the instruction of the first access network device.

Exemplarily, the first access network device may send the first response message to the terminal device through a physical layer message (such as a PDCCH message), a MAC layer message (such as MAC CE), an RRC message, or other messages, and this application does not make any limited.

In a specific implementation manner, when the first response message includes information instructing the terminal device to deactivate the secondary cell, the first response message may further include a first duration and/or a second duration, where the first duration is The duration of deactivating the auxiliary cell, the second duration is the duration between the moment when the first response message is received and the starting moment of deactivating the auxiliary cell; optionally, the terminal device may Continue to perform RLM on the auxiliary cell within two hours. When the first response message includes information instructing the terminal device to release the resources occupied by the auxiliary cell, the first response message may also include a third duration, which is the time between the time the first response message is received and the terminal device releasing the auxiliary cell. The duration of the starting time of resources occupied by the cell; optionally, the terminal device may always perform RLM on the auxiliary cell before releasing the auxiliary cell.

Optionally, when the terminal device executes the first operation to perform RLM on the auxiliary cell (or the second TRP), it is judged whether the radio link of the auxiliary cell (or the second TRP) is restored, and when it is determined that the radio link of the auxiliary cell has been restored , the terminal device may also perform step 207a: the terminal device sends a first recovery message to the first access network device, and the first recovery message is used to notify that the wireless link of the secondary cell has been recovered.

Exemplarily, the terminal device sends the first recovery message to the first access network device, specifically, it may be sent through physical layer signaling such as PUCCH message, or sent by multiplexing UCI in PUSCH, or sent by MAC CE, It may be sent by an RRC message or by other uplink messages, and the present application does not limit the specific message by which the first recovery message is sent.

In one embodiment, the first recovery message may include one or more of the following information: the identifier of the auxiliary cell, the identifier of the second TRP, the PCI of the auxiliary cell, and the reason for radio link recovery (for example: physical layer link road problem recovery), the beam-level measurement results of the reference signal of the first TRP, the cell-level measurement results of the reference signal of the first TRP, the beam-level measurement results of the reference signal of the second TRP, the cell-level measurement results of the reference signal of the second TRP The measurement result is the beam-level measurement result of the reference signal of the third TRP or the cell-level measurement result of the reference signal of the third TRP.

It should be noted that, in the scenario of multiple auxiliary cells, when the radio link of other auxiliary cells where RLF occurs has been restored, the first recovery message above also includes relevant recovery information of other auxiliary cells, such as any other auxiliary cell Cell ID, ID of TRP corresponding to any other auxiliary cell, PCI of any other auxiliary cell, reason for radio link recovery of any other auxiliary cell, beam-level measurement of reference signal of TRP corresponding to any other auxiliary cell results or cell-level measurements of reference signals.

In an exemplary embodiment, the terminal device determines that the wireless link of the auxiliary cell has been restored, and the specific method may be: the terminal device determines that a synchronization occurs after determining that the physical layer link quality of the auxiliary cell is higher than the synchronization threshold; Afterwards, when the terminal device determines that the number of consecutive synchronization occurrences within the preset duration is greater than or equal to the third preset number of times, or determines that the total number of synchronization occurrences is greater than or equal to the third preset number of times, it determines that the radio link of the secondary cell has been restored.

Optionally, the terminal device may determine that the radio link of the secondary cell has been restored through the physical layer and the RRC layer of the terminal device. Exemplarily, the specific process can be as follows: the physical layer of the terminal device measures the physical link quality of the auxiliary cell, and compares it with the synchronization threshold corresponding to the auxiliary cell, and the synchronization threshold value is the synchronization threshold of the auxiliary cell involved in step 203 value. The RRC layer counts and starts/stops the timer for the synchronization indication of the secondary cell reported by the physical layer, and further judges whether the radio link of the secondary cell has been restored. For example, the physical layer of the terminal device judges that the link quality of the physical layer of the auxiliary cell is higher than the synchronization threshold and sends a synchronization indication to the RRC layer; Or when it is equal to the third preset number of times, or it is determined that the total number of times of receiving the synchronization indication is greater than or equal to the third preset number of times, it is determined that the radio link of the secondary cell has been restored. Optionally, the third preset number of times may be the same as or different from the second preset number of times involved in step 203, which is not limited in this application.

Optionally, the synchronization indication reported by the physical layer to the RRC layer may include an identifier of the secondary cell, a PCI of the secondary cell, or an identifier of the second TRP.

It should be noted that the above process can also be referred to for the process of judging whether the radio link of the other secondary cell where the RLF occurs is restored.

In an exemplary implementation manner, when the terminal device determines that the radio link of the auxiliary cell has been restored, the terminal device may perform one or more of the following operations:

The terminal device activates the auxiliary cell (or the second TRP);

The terminal device requests the first access network device to increase the transmission of the second TRP;

The terminal device requests configuration information of the auxiliary cell (or the second TRP) from the first access network device;

The terminal device recovers the beam failure recovery request process of the auxiliary cell;

The terminal device resumes monitoring the PDCCH of the secondary cell (or the second TRP); or

The terminal device resumes the RLM process of the secondary cell (or the second TRP).

In an optional implementation manner, the terminal device may directly perform the above operations after performing step 207a.

In another optional implementation manner, the terminal device may directly perform the above operation after the following step 208a. Specifically, step 208a: the first access network device sends a first recovery response message to the terminal device, the first recovery response message is used to respond to the first recovery message, and the first recovery response message may include one of the following indication information or Multiple:

Information indicating that the first recovery message is successfully received, for example, may be indicated by 1-bit ACK information;

information indicating the activation of the secondary cell (or the second TRP);

Indicate configuration information of the secondary cell (or the second TRP); or

Indicates information to increase the transmission of the second TRP.

That is to say, the first access network device instructs the terminal device to perform the above operation through the indication information of the first recovery response message, that is, the terminal device performs the above operation according to the instruction of the first access network device.

Exemplarily, the first access network device may send the first recovery response message to the terminal device through a physical layer message, a MAC layer message, an RRC message or other messages, which is not limited in this application.

In the above scenario a2, the terminal device can report the RLF situation of the auxiliary cell through the serving cell where RLF does not occur, so that when RLF occurs in some TRPs in the multi-TRP transmission scenario, unnecessary RRC re-establishment can be avoided and the impact on data transmission can be reduced .

The scenario a3 is described below in combination with FIG. 4 :

Exemplarily, in the scenario a3, two cells, the serving cell corresponding to the first TRP and the auxiliary cell corresponding to the second TRP, exist as an example for illustration. The scenarios of multiple serving cells and multiple auxiliary cells have the same principle and can be referred to each other.

When it is determined that RLF occurs in the serving cell and RLF does not occur in the auxiliary cell, the terminal device performs step 204b: the terminal device sends a second message to the second access network device, and the second message is used to notify the serving cell that RLF occurs.

It should be noted that, when there are multiple supplementary cells, the supplementary cell may be one of at least one supplementary cell in which no RLF occurs. When there are multiple serving cells, in the scenario a3, RLF occurs in all the serving cells.

Exemplarily, the terminal device sends the second message to the second access network device, specifically, it may be sent through physical layer signaling such as PUCCH message, or sent by multiplexing UCI in PUSCH, or sent by MAC CE, or It is sent by RRC message or sent by other uplink message, and the present application does not limit the specific message by which the second message is sent.

In an optional implementation manner, the second message may include one or more of the following information: the identity of the serving cell, the identity of the first TRP, the PCI of the serving cell, the reason for RLF in the serving cell (such as physical layer link problem), the beam-level measurement results of the reference signal of the second TRP, the cell-level measurement results of the reference signal of the second TRP, the beam-level measurement results of the reference signal of the first TRP, the cell-level measurement results of the reference signal of the first TRP Level measurement results, beam-level measurement results of the reference signal of the third TRP, or cell-level measurement results of the reference signal of the third TRP.

It should be noted that, in the scenario of multiple auxiliary cells, when RLF occurs in other auxiliary cells, the above second message also includes related information of other auxiliary cells, such as the identity of any other auxiliary cell, any other auxiliary cell The identifier of the TRP corresponding to the cell, the PCI of any other auxiliary cell, the cause of RLF in any other auxiliary cell, the beam-level measurement result of the reference signal of the TRP corresponding to any other auxiliary cell or the cell-level measurement result of the reference signal. In the scenario of multiple serving cells, the second message above also includes information about other serving cells, such as the identity of any other serving cell, the identity of the TRP corresponding to any other serving cell, and the PCI of any other serving cell. , the cause of RLF occurring in any other serving cell, the beam-level measurement result of the reference signal of the TRP corresponding to any other serving cell or the cell-level measurement result of the reference signal.

Optionally, after step 204b, the terminal device further performs step 206b: the terminal device performs a second operation, where the second operation may include any one or more of the following:

The terminal device deactivates the serving cell (or the first TRP);

The terminal device releases the resources occupied by the serving cell (or the first TRP);

The terminal device deletes the configuration information of the serving cell (or the first TRP);

The terminal device does not monitor the PDCCH of the serving cell (or the first TRP);

For the beam failure of the serving cell (or the first TRP), if no candidate beam available to the serving cell (or the first TRP) is identified, the terminal device does not send a beam failure recovery request, for example, the terminal device does not send a BFR MAC CE;

For the beam failure of the serving cell (or the first TRP), the terminal device does not perform random access;

The terminal device performs RLM on the serving cell (or the first TRP), and judges whether the radio link of the serving cell (or the first TRP) is restored;

The terminal device does not perform RLM on the serving cell (or the first TRP); or

The terminal device switches to the second cell and uses the second cell as a new serving cell. The second cell is the auxiliary cell or the first neighboring cell. The PCI of the first neighboring cell is different from the PCI of the serving cell and the auxiliary cell. A neighbor cell may be the neighbor cell with the best signal quality.

It should be noted that when there are multiple supplementary cells and there is a supplementary cell other than the supplementary cell corresponding to the second TRP that does not have RLF, the second cell may also be another supplementary cell that does not have RLF.

Exemplarily, when the above-mentioned second operating terminal device does not monitor the PDCCH of the serving cell (or the first TRP), the terminal device may not monitor the serving cell (or the first TRP) even during the DRX activation period of the RRC connected state The PDCCH.

It should be noted that, when there are multiple auxiliary cells and multiple serving cells, the terminal device also performs the above operation for other auxiliary cells and other serving cells where RLF occurs, and this application will not describe it in detail.

In an optional implementation manner, the terminal device may directly perform the foregoing step 206b after performing step 204b. In this case, the second message may further include the second operation performed by the terminal device.

In another optional implementation, the terminal device may also perform step 260b after step 205b described below. Specifically, step 205b: the second access network device sends a second response message to the terminal device, the second response message is used to respond to the second message, and the second response message may include one or more of the following indication information:

Information indicating that the second message is successfully received, for example, may be indicated by 1-bit ACK information;

Instructing the terminal device to deactivate the information of the serving cell (or the first TRP);

Instructing the terminal device to release information on resources occupied by the serving cell (or the first TRP);

Instructing the terminal device to delete information about the configuration information of the serving cell (or the first TRP); or

Information that instructs the terminal device to switch to the second cell.

That is to say, the second access network device instructs the terminal device to perform the above-mentioned second operation through the indication information of the above-mentioned second response message, that is, the terminal device performs the above-mentioned second operation according to the instruction of the second access network device.

Exemplarily, the second access network device may send the second response message to the terminal device through a physical layer message, a MAC layer message, an RRC message or other messages, which is not limited in this application.

In a specific implementation manner, when the second response message includes information instructing the terminal device to deactivate the serving cell, the second response message further includes a fourth duration and/or a fifth duration, and the fourth duration is deactivation The duration of the serving cell, the fifth duration is the duration between the moment when the second response message is received and the starting moment of deactivating the serving cell; optionally, the terminal device can be within the third duration and/or the fourth duration Continue to perform RLM on the serving cell. When the second response message includes information instructing the terminal device to release the resource occupied by the serving cell, the second response message also includes a sixth time length, the sixth time length is from the time when the second response message is received to the terminal device releases the resource occupied by the serving cell The duration of the starting moment of the resource; Optionally, the terminal device may always perform RLM on the serving cell before releasing the serving cell.

Optionally, when the terminal device executes the second operation to perform RLM on the serving cell (or the first TRP), it is judged whether the radio link of the serving cell (or the first TRP) is restored, and when it is determined that the radio link of the serving cell has been restored , the terminal device may also execute step 207b: the terminal device sends a second recovery message to the first access network device or the second access network device, and the second recovery message is used to notify the serving cell that the radio link has been recovered.

It should be noted that the terminal device may also send the second restoration message to the access network device corresponding to the second cell after the handover. Wherein, in FIG. 4 , it is only shown that the terminal device sends the second recovery message to the second access network device as an example, and it does not limit this application.

Exemplarily, the terminal device sends the second recovery message to the first access network device or the second access network device or the access network device corresponding to the second cell, which may specifically be sent through physical layer signaling such as a PUCCH message, or It is sent by multiplexing UCI in PUSCH, or sent by MAC CE, or sent by RRC message, or sent by other uplink messages. This application does not limit the specific message used to send the above-mentioned recovery message.

Optionally, the second recovery message may include one or more of the following information: the identity of the serving cell, the identity of the first TRP, the PCI of the serving cell, the reason for the radio link recovery (for example: physical layer link problem recovery), the beam-level measurement results of the reference signal of the second TRP, the cell-level measurement results of the reference signal of the second TRP, the beam-level measurement results of the reference signal of the first TRP, and the cell-level measurement results of the reference signal of the first TRP , the beam-level measurement result of the reference signal of the third TRP or the cell-level measurement result of the reference signal of the third TRP.

It should be noted that, in the scenario of multiple auxiliary cells, when the radio links of other auxiliary cells where RLF has occurred have been restored, the above-mentioned second restoration message also includes relevant restoration information of other auxiliary cells, such as any other auxiliary cell Cell ID, ID of TRP corresponding to any other auxiliary cell, PCI of any other auxiliary cell, reason for radio link recovery of any other auxiliary cell, beam-level measurement of reference signal of TRP corresponding to any other auxiliary cell results or cell-level measurements of reference signals. In the scenario of multiple serving cells, the above second recovery message also includes relevant recovery information of other serving cells, such as the identity of any other serving cell, the identity of the TRP corresponding to any other serving cell, the identity of any other serving cell PCI, the reason for the radio link recovery of any other serving cell, the beam-level measurement result of the reference signal of the TRP corresponding to any other serving cell or the cell-level measurement result of the reference signal.

In an exemplary embodiment, the terminal device determines that the wireless link of the serving cell has been restored. The specific method may be: the terminal device determines that a synchronization occurs after determining that the quality of the physical layer link of the serving cell is higher than the synchronization threshold; Afterwards, when the terminal device determines that the number of consecutive synchronization occurrences within the preset duration is greater than or equal to the fourth preset number of times, or determines that the total number of synchronization occurrences is greater than or equal to the fourth preset number of times, it determines that the wireless link of the serving cell has been restored.

Optionally, the terminal device may determine that the radio link of the serving cell has been restored through both the physical layer and the RRC layer of the terminal device. Exemplarily, the specific process may be as follows: the physical layer of the terminal device measures the physical link quality of the serving cell, and compares it with the synchronization threshold corresponding to the serving cell, and the synchronization threshold value is the synchronization threshold of the serving cell involved in step 203 value. The RRC layer counts and starts/stops the timer for the synchronization indication of the serving cell reported by the physical layer, and further judges whether the radio link of the serving cell has been restored. For example, the physical layer of the terminal equipment sends a synchronization indication to the RRC layer after judging that the quality of the physical layer link of the serving cell is higher than the synchronization threshold; Or when it is equal to the fourth preset number of times, or it is determined that the total number of times of receiving the synchronization indication is greater than or equal to the fourth preset number of times, it is determined that the radio link of the serving cell has been restored. Optionally, the fourth preset number of times may be the same as or different from the second preset number of times involved in step 203, which is not limited in this application.

Optionally, the synchronization indication reported by the physical layer to the RRC layer may include the identifier of the serving cell, the PCI of the serving cell, or the identifier of the first TRP.

It should be noted that the above-mentioned process can also be referred to for the determination process of whether the radio link of other auxiliary cells or other serving cells where RLF occurs is restored.

In an exemplary implementation manner, when the terminal device determines that the radio link of the serving cell has been restored, the terminal device may perform one or more of the following operations:

The terminal device activates the serving cell (or the first TRP);

The terminal device resumes monitoring the PDCCH of the serving cell (or the first TRP);

The terminal device requests the first access network device or the second access network device to increase the transmission of the first TRP;

The terminal device requests the configuration information of the serving cell (or the first TRP) from the first access network device or the second access network device;

The terminal device recovers the beam failure recovery request process of the serving cell (or the first TRP); or

The terminal device resumes the RLM process of the serving cell (or the first TRP).

In an optional implementation manner, the terminal device may directly perform the above operations after performing step 207b.

In another optional implementation manner, the terminal device may directly perform the above operation after the following step 208b. Specifically, step 208b: the terminal device receives a second recovery response message from the first access network device or the second access network device, the second recovery response message is used to respond to the second recovery message, and the second recovery response message includes the following instructions One or more of the information:

Information indicating successful reception of the second recovery message, for example, may be indicated by 1-bit ACK information;

information indicating the activation of the serving cell (or the first TRP);

Indicate the configuration information of the serving cell (or the first TRP); or

Indicates the information to increase the transmission of the first TRP.

It should be noted that the terminal device may also receive the second recovery response message from the access network device corresponding to the second cell, where, as in 4, only the terminal device receives the second recovery response message from the second access network device as an example, It is not intended to limit the application.

That is to say, the first access network device or the second access network device or the access network device corresponding to the second cell instructs the terminal device to perform the above operation through the indication information of the second recovery response message, that is, the terminal device according to The first access network device or the second access network device or the access network device corresponding to the second cell performs the above operation.

Exemplarily, the first access network device or the second access network device or the access network device corresponding to the second cell may send the second recovery response to the terminal device through a physical layer message, a MAC layer message, an RRC message or other messages news, this application does not limit it.

In the above scenario a2, the terminal device can report the RLF of the serving cell through the auxiliary cell where RLF does not occur, so that when RLF occurs in some TRPs in the multi-TRP transmission scenario, unnecessary RRC re-establishment can be avoided and the impact on data transmission can be reduced .

It should be noted that, in FIG. 2 to FIG. 4 , only the first access network device corresponding to the first TRP and the second access network device corresponding to the second TRP are different access network devices as an example. It should be understood that when the first TRP and the second TRP correspond to the same access network device, that is, when the first access network device and the second access network device are the same, the first access network device and the second access network device in FIGS. 2-4 Operations of the second access network device may be combined into operations of the same access network device, which is not limited in this application.

Through the above communication method, the terminal device can monitor the wireless links of multiple TRPs in a multi-TRP scenario, so that subsequent targeted operations can be performed for different TRPs when RLF occurs, so as to ensure data transmission.

Based on the above embodiments, this embodiment of the present application also provides a communication device. Referring to FIG. 5 , the communication device 500 may include a transceiver unit 501 and a processing unit 502 . Wherein, the transceiver unit 501 is used for the communication device 500 to receive information (message or data) or send information (message or data), and the processing unit 502 is used to control and manage the actions of the communication device 500 . The processing unit 502 may also control the steps performed by the transceiver unit 501 .

Exemplarily, the communication device 500 may specifically be the terminal device in the above embodiment, a processor in the terminal device, or a chip, or a chip system, or a functional module, etc.; or, the communication device 500 may specifically be It is the first access network device in the above embodiment, the processor of the first access network device, or a chip, or a chip system, or a functional module, etc.; or, the communication device 500 may specifically be the above implementation In the example, the second access network device, the processor of the second access network device, or a chip, or a chip system, or a functional module, etc.

In one embodiment, when the communication device 500 is used to implement the functions of the terminal equipment in the above embodiments described in FIGS. 2-4 , the transceiver unit 501 can implement the Sending and receiving operations performed by the terminal device; the processing unit 502 may implement other operations performed by the terminal device in the embodiments shown in FIGS. 2-4 except for the sending and receiving operations. For example, the transceiving unit 501 is configured to receive the radio link monitoring configuration information of the first TRP and the radio link monitoring configuration information of the second TRP from the first access network device; the processing unit 502 is configured to Perform radio link monitoring on the serving cell according to the radio link monitoring configuration information of the first TRP, and perform radio link monitoring on the first cell according to the radio link monitoring configuration information of the second TRP. Specifically, for related specific descriptions, reference may be made to related descriptions in the above-mentioned embodiments shown in FIGS. 2-4 , which will not be described in detail here.

In another embodiment, when the communication device 500 is used to implement the functions of the first access network device in the embodiment described in FIGS. 2-4 above, the transceiver unit 501 can implement the The transceiving operation performed by the first access network device in the embodiment; the processing unit 502 may implement other operations except the transceiving operation performed by the first access network device in the embodiments shown in FIGS. 2-4 . For example, the processing unit 502 is configured to determine the wireless link monitoring configuration information of the first TRP and the wireless link monitoring configuration information of the second TRP; the transceiver unit 501 is configured to send the wireless link monitoring configuration information of the first TRP to the terminal device. Link monitoring configuration information and wireless link monitoring configuration information of the second TRP. Specifically, for related specific descriptions, reference may be made to related descriptions in the above-mentioned embodiments shown in FIGS. 2-4 , which will not be described in detail here.

In another embodiment, when the communication device 500 is used to realize the functions of the second access network device in the embodiments described in FIGS. 2-The transceiving operation performed by the second access network device in the embodiment shown in FIG. 4; the processing unit 502 can implement the transceiving operation performed by the second access network device in the embodiment shown in FIGS. operations other than operations. Specifically, for related specific descriptions, reference may be made to related descriptions in the above-mentioned embodiments shown in FIGS. 2-4 , which will not be described in detail here.

It should be noted that the division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation. Each functional unit in the embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

Based on the above embodiments, this embodiment of the present application also provides a communication device. Referring to FIG. 6 , the communication device 600 may include a transceiver 601 and a processor 602 . Optionally, the communication device 600 may further include a memory 603 . Wherein, the memory 603 may be set inside the communication device 600 , and may also be set outside the communication device 600 . Wherein, the processor 602 may control the transceiver 601 to receive and send information or data and the like.

Specifically, the processor 602 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The processor 602 may further include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit (application-specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD) or a combination thereof. The aforementioned PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL) or any combination thereof.

Wherein, the transceiver 601, the processor 602 and the memory 603 are connected to each other. Optionally, the transceiver 601, the processor 602 and the memory 603 are connected to each other through a bus 604; the bus 604 can be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 6 , but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 603 is used to store programs and the like. Specifically, the program may include program code including computer operation instructions. The memory 603 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories. The processor 602 executes the application program stored in the memory 603 to realize the above functions, thereby realizing the functions of the communication device 600 .

Exemplarily, the communications apparatus 600 may be the terminal device in the above embodiment; it may also be the first access network device in the above embodiment; it may also be the second access network device in the above embodiment.

In one embodiment, when the communication device 600 implements the functions of the terminal equipment in the embodiments shown in FIGS. 2-4 , the transceiver 601 can realize the The transceiving operation to be performed; the processor 602 may implement other operations performed by the terminal device in the embodiments shown in FIGS. 2-4 except for the transceiving operation. For specific related specific descriptions, reference may be made to related descriptions in the above-mentioned embodiments shown in FIGS. 2-4 , which will not be described in detail here.

In another embodiment, when the communication device 600 realizes the functions of the first access network device in the embodiments shown in FIGS. 2-4 , the transceiver 601 can realize the embodiments shown in FIGS. 2-4 The transceiving operation performed by the first access network device; the processor 602 may implement other operations except the transceiving operation performed by the first access network device in the embodiments shown in FIGS. 2-4 . For specific related specific descriptions, reference may be made to related descriptions in the above-mentioned embodiments shown in FIGS. 2-4 , which will not be described in detail here.

In another embodiment, when the communication device 600 realizes the function of the second access network device in the embodiments shown in FIGS. 2-4 , the transceiver 601 can realize the embodiments shown in FIGS. 2-4 The transceiving operation performed by the second access network device; the processor 602 may implement other operations except the transceiving operation performed by the second access network device in the embodiments shown in FIGS. 2-4 . For specific related specific descriptions, reference may be made to related descriptions in the above-mentioned embodiments shown in FIGS. 2-4 , which will not be described in detail here.

Based on the above embodiments, an embodiment of the present application provides a communication system, and the communication system may include the terminal device, the first access network device, the second access network device, and the like involved in the above embodiments.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.

The embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.

The embodiment of the present application further provides a chip, including a processor, the processor is coupled to a memory, and is configured to call a program in the memory so that the chip implements the communication method provided by the above method embodiment.

The embodiment of the present application further provides a chip, the chip is coupled with a memory, and the chip is used to implement the communication method provided in the foregoing method embodiment.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Apparently, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method is applied to a terminal device or a chip in the terminal device, and the method includes:

receiving radio link monitoring configuration information of the first transmission reception point TRP and radio link monitoring configuration information of the second TRP from the first access network device, where the first access network device manages radio resources of the serving cell Access network equipment, the first TRP is the antenna or antenna panel of the first access network equipment, the second TRP corresponds to the first cell, the serving cell and the physical cell identity of the first cell PCI is different, the terminal device communicates with the first TRP and the second TRP;

performing radio link monitoring on the serving cell according to the radio link monitoring configuration information of the first TRP, and performing radio link monitoring on the first cell according to the radio link monitoring configuration information of the second TRP.
The method of claim 1, further comprising:

When it is determined that no radio link failure RLF occurs in the serving cell and RLF occurs in the first cell, send a first message to the first access network device, where the first message is used to notify the first cell RLF occurs.
The method according to claim 2, wherein the first message includes one or more of the following information: the identity of the first cell, the identity of the second TRP, the identity of the first cell PCI of the first cell, the cause of RLF in the first cell, the beam-level measurement result of the reference signal of the first TRP, the cell-level measurement result of the reference signal of the first TRP, and the measurement result of the reference signal of the second TRP The beam-level measurement result, the cell-level measurement result of the reference signal of the second TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein, the first The PCIs corresponding to the three TRPs are different from the PCIs corresponding to the first TRP and the second TRP.
The method according to claim 3, wherein when it is determined that RLF does not occur in the serving cell and RLF occurs in the first cell, the method further comprises: performing a first operation, wherein the first operation Including any one or more of the following:

For the beam failure of the first cell, if no candidate beam available to the first cell is identified, no beam failure recovery request is sent;

Perform radio link monitoring RLM on the first cell, and determine whether the radio link of the first cell is restored; or

Increasing and/or activating transmission of a fourth TRP, said third TRP comprising said fourth TRP.
The method according to claim 4, wherein when increasing and/or activating the transmission of the fourth TRP, the method further comprises:

Sending a notification message to the first access network device, where the notification message is used to notify that the transmission of the fourth TRP has been added and/or activated.
The method according to any one of claims 2-4, wherein the method further comprises:

Receive a first response message from the first access network device, the first response message is used to respond to the first message, and the first response message includes one or more of the following indication information:

Instructing the terminal device to deactivate the information of the first cell;

information instructing the terminal device to release resources occupied by the first cell; or

Instructing the terminal device to increase and/or activate the transmission information of the fourth TRP; wherein, the third TRP includes the fourth TRP, and the PCI corresponding to the third TRP is the same as the first TRP and the second TRP The corresponding PCI is different.
The method according to any one of claims 4-6, wherein when it is determined that the radio link of the first cell has recovered, the method further comprises:

Sending a first recovery message to the first access network device, where the first recovery message is used to notify that the radio link of the first cell has been recovered.
The method according to claim 7, wherein the first recovery message includes one or more of the following information: the identity of the first cell, the identity of the second TRP, the first The PCI of the cell, the reason for the radio link recovery, the beam-level measurement result of the reference signal of the first TRP, the cell-level measurement result of the reference signal of the first TRP, and the beam-level measurement result of the reference signal of the second TRP Measurement results, cell-level measurement results of the reference signal of the second TRP, beam-level measurement results of the reference signal of the third TRP, or cell-level measurement results of the reference signal of the third TRP; wherein, the third TRP The corresponding PCI is different from the PCIs corresponding to the first TRP and the second TRP.
The method according to claim 7 or 8, wherein the method further comprises:

Do one or more of the following:

requesting the first access network device to increase the transmission of the second TRP; or

Recovering the beam failure recovery request process of the first cell.
The method of claim 1, further comprising:

When it is determined that RLF occurs in the serving cell and RLF does not occur in the first cell, send a second message to the second access network device, where the second message is used to notify the serving cell that RLF occurs, and the second The access network device is an access network device that manages radio resources of the first cell.
The method according to claim 10, wherein the second message includes one or more of the following information: the identity of the serving cell, the identity of the first TRP, the PCI of the serving cell , the cause of RLF in the serving cell, the beam-level measurement result of the reference signal of the second TRP, the cell-level measurement result of the reference signal of the second TRP, and the beam-level measurement of the reference signal of the first TRP result, the cell-level measurement result of the reference signal of the first TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein, the third TRP corresponds to The PCI is different from the PCIs corresponding to the first TRP and the second TRP.
The method according to claim 10 or 11, wherein when it is determined that RLF occurs in the serving cell and that RLF does not occur in the first cell, the method further comprises: performing a second operation, the second operation Including any one or more of the following:

For the beam failure of the serving cell, if no candidate beam available to the serving cell is identified, a beam failure recovery request is not sent;

performing RLM on the serving cell, and judging whether the radio link of the serving cell is recovered; or

handover to a second cell, and use the second cell as a serving cell, the second cell is the first cell or the first neighboring cell, and the PCI of the first neighboring cell is related to the serving cell and the The PCI of the first cell is different.
The method according to any one of claims 10-12, wherein the method further comprises:

Receive a second response message from the second access network device, the second response message is used to respond to the second message, and the second response message includes one or more of the following indication information:

Instructing the terminal device to deactivate the information of the serving cell;

information instructing the terminal device to release resources occupied by the serving cell; or

Information instructing the terminal device to switch to a second cell; the second cell is the first cell or the first neighboring cell, and the PCI of the first neighboring cell is the same as that of the serving cell and the first cell PCI is different.
The method according to claim 12 or 13, wherein when it is determined that the radio link of the serving cell has recovered, the method further comprises:

Sending a second recovery message to the first access network device or the second access network device, where the second recovery message is used to notify that the radio link of the serving cell has been recovered.
The method according to claim 14, wherein the second recovery message includes one or more of the following information: the identity of the serving cell, the identity of the first TRP, the identity of the serving cell PCI, the reason for radio link recovery, the beam-level measurement result of the reference signal of the second TRP, the cell-level measurement result of the reference signal of the second TRP, and the beam-level measurement result of the reference signal of the first TRP . The cell-level measurement result of the reference signal of the first TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein the third TRP corresponds to The PCI is different from the PCIs corresponding to the first TRP and the second TRP.
The method according to claim 14 or 15, further comprising:

Do one or more of the following:

requesting the first access network device or the second access network device to increase the transmission of the first TRP; or

Restoring the beam failure restoration request process of the serving cell.
The method according to any one of claims 1-16, further comprising:

Receive radio link recovery judgment configuration information from the first access network device, where the radio link recovery judgment configuration information includes one or more of the following: a physical layer link synchronization threshold for judging RLF recovery , a physical layer link out-of-sync threshold value for judging RLF restoration, timer information for judging RLF restoration, counter information for judging RLF restoration, or synchronization times for judging RLF restoration.
A communication method, characterized in that the method is applied to a first access network device or a chip in the first access network device, and the method includes:

Generate radio link monitoring configuration information of a first transmission and reception point TRP and radio link monitoring configuration information of a second TRP, where the first TRP is an antenna or an antenna panel of the first access network device, and the first The access network device is the access network device that manages the radio resources of the serving cell, the second TRP corresponds to the first cell, the physical cell identity PCI of the serving cell is different from that of the first cell, and the terminal device is different from the first cell. the first TRP communicates with the second TRP;

Sending the radio link monitoring configuration information of the first TRP and the radio link monitoring configuration information of the second TRP to the terminal device.
The method of claim 18, further comprising:

Receive a first message from the terminal device, where the first message is used to notify the first cell that a radio link failure RLF occurs.
The method according to claim 19, wherein the first message includes one or more of the following information: the identity of the first cell, the identity of the second TRP, the identity of the first cell PCI of the first cell, the cause of RLF in the first cell, the beam-level measurement result of the reference signal of the first TRP, the cell-level measurement result of the reference signal of the first TRP, and the measurement result of the reference signal of the second TRP The beam-level measurement result, the cell-level measurement result of the reference signal of the second TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein, the first The PCIs corresponding to the three TRPs are different from the PCIs corresponding to the first TRP and the second TRP.
The method of claim 20, further comprising:

A notification message is received from the terminal device, the notification message being used to notify that transmission of a fourth TRP has been added and/or activated, the third TRP containing the fourth TRP.
The method according to claim 19 or 20, further comprising:

Sending a first response message to the terminal device, where the first response message is used to respond to the first message, where the first response message includes one or more of the following indication information:

Instructing the terminal device to deactivate the information of the first cell;

information instructing the terminal device to release resources occupied by the first cell; or

Instructing the terminal device to increase and/or activate the transmission information of the fourth TRP; wherein, the third TRP includes the fourth TRP, and the PCI corresponding to the third TRP is the same as the first TRP and the second TRP The corresponding PCI is different.
The method according to any one of claims 19-22, further comprising:

Receive a first restoration message from the terminal device, where the first restoration message is used to notify that the radio link of the first cell has been restored.
The method according to claim 23, wherein the first recovery message includes one or more of the following information: the identity of the first cell, the identity of the second TRP, the first The PCI of the cell, the reason for the radio link recovery, the beam-level measurement result of the reference signal of the first TRP, the cell-level measurement result of the reference signal of the first TRP, and the beam-level measurement result of the reference signal of the second TRP The measurement result, the cell-level measurement result of the reference signal of the second TRP, the beam-level measurement result of the reference signal of the third TRP, or the cell-level measurement result of the reference signal of the third TRP; wherein, the third TRP The corresponding PCI is different from the PCIs corresponding to the first TRP and the second TRP.
The method according to any one of claims 18-24, wherein the method further comprises:

Send wireless link recovery judgment configuration information to the terminal device, the wireless link recovery judgment configuration information includes one or more of the following: a physical layer link synchronization threshold for judging RLF recovery, a physical layer link synchronization threshold for judging RLF The recovered physical layer link out-of-sync threshold, timer information for judging RLF recovery, counter information for judging RLF recovery, or synchronization times for judging RLF recovery.
A communication device, characterized in that it includes a memory, a processor and a transceiver, wherein:

the memory is used to store computer instructions;

The transceiver is used to receive and transmit information;

The processor is coupled with a memory, and is used for invoking computer instructions in the memory to make the communication device execute the method according to any one of claims 1-17.
A communication device, characterized in that it includes a memory, a processor and a transceiver, wherein:

the memory is used to store computer instructions;

The transceiver is used to receive and send information;

The processor, coupled with the memory, is configured to call computer instructions in the memory to make the communication device execute the method according to any one of claims 18-25.
A computer-readable storage medium, characterized in that, computer-executable instructions are stored in the computer-readable storage medium, and the computer-executable instructions are used to make the computer execute the above claims when called by the computer The method described in any one of 1-17, or carry out the method described in any one in the above-mentioned claims 18-25.