WO2023236060A1

WO2023236060A1 - Failure recovery method and apparatus thereof

Info

Publication number: WO2023236060A1
Application number: PCT/CN2022/097456
Authority: WO
Inventors: 熊艺; 吴昱民
Original assignee: 北京小米移动软件有限公司
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2023-12-14
Also published as: CN117546524A

Abstract

Disclosed in the embodiments of the present application are a failure recovery method and an apparatus thereof, which can be applied to the technical field of communications. The method comprises: in response to a failure, a terminal device performs failure recovery on the basis of mobility configurations of cell groups, the mobility configurations of the cell groups comprising a mobility configuration of a candidate master cell group (MCG) and a mobility configuration of a candidate secondary cell group (SCG) (S201). Therefore, when a network device configures for the terminal device both the mobility configuration of the MCG and the mobility configuration of the SCG, the terminal device can perform failure recovery processing. The terminal device can conveniently perform failure recovery on the basis of the mobility configurations of the cell groups.

Description

A failure recovery method and its device

Technical field

The present application relates to the field of communication technology, and in particular, to a failure recovery method and device thereof.

Background technique

In MR-DC (Multi-Radio Dual Connectivity, multi-radio dual connection technology), terminal equipment can utilize radio resources provided by two different schedules, which are located in two different NG-RAN (5G radio access networks) On the nodes, one provides NR access and the other provides E-UTRA or NR access via non-ideal backhaul connections. One serves as MN (Master Node, primary node) and the other serves as SN (Secondary Node, secondary node). MNs and SNs are connected through network interfaces, at least one of which is connected to the core network.

Currently, network equipment configures the mobility configuration of MCG (Master Cell group, primary cell group) or the mobility configuration of SCG (Secondary Cell group, secondary cell group) for terminal equipment. When MCG fails, the mobility of MCG can be used. Configure MCG failure recovery; or, when an SCG failure occurs, use the SCG mobility configuration to perform SCG failure recovery. However, when the network device is configured with both MCG mobility configuration and SCG mobility configuration for the terminal device, no research on failure recovery has been conducted.

Contents of the invention

Embodiments of the present application provide a failure recovery method and device, which can be applied in the field of communication technology to realize the situation where the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group. In response to a failure, failure recovery is performed based on the mobility configuration of the cell group, thereby implementing failure recovery processing when the network device simultaneously configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal device.

In a first aspect, embodiments of the present application provide a failure recovery method, which is executed by a terminal device. The method includes: in response to a failure, performing failure recovery based on the mobility configuration of the cell group; wherein, the The mobility configuration includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.

In one implementation, the mobility configuration of the candidate primary cell group exists in the mobility configuration of one cell group; the mobility configuration of the candidate secondary cell group exists in the mobility configuration of another cell group. middle.

In one implementation, in response to the occurrence of a failure, performing failure recovery based on the mobility configuration of the cell group includes one or more of the following: in response to the occurrence of the secondary cell group failure, selecting a cell for failure recovery; when When the cell used for failure recovery is a cell in the first candidate secondary cell group, secondary cell group failure recovery is performed based on the first candidate secondary cell group configuration in the mobility configuration of the first candidate secondary cell group.

In an implementation manner, the method further includes: when the cell used for failure recovery is not a cell in any candidate secondary cell group, sending a reconstruction request message to the network device, requesting the same as the cell used for failure recovery. The restored cell reestablishes the RRC connection or enters the idle state.

In one implementation, the mobility configuration of a single cell group includes: trigger conditions, and/or cell group configuration; wherein the cell group configuration includes: candidate primary cell group configuration and the configuration of the candidate primary cell. Group-associated candidate secondary cell group configuration.

In one implementation, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the trigger condition of the candidate primary cell group, and/ Or, candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group.

In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the occurrence of a failure includes one or more of the following: in response to the failure of the primary cell group, selecting a cell for failure recovery; when When the cell used for failure recovery is a cell in the second candidate primary cell group, release the secondary cell group currently accessed by the terminal device, and/or, based on the second candidate primary cell group configuration and the second candidate The secondary cell group is configured to perform primary cell group failure recovery and secondary cell group connection; wherein the second candidate secondary cell group is a secondary cell group associated with the second candidate primary cell group.

In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the occurrence of a failure includes one or more of the following: in response to the failure of the primary cell group, selecting a cell for failure recovery; when When the cell used for failure recovery is a cell in the third candidate primary cell group, primary cell group failure recovery is performed based on the configuration of the third candidate primary cell group.

In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the occurrence of the failure includes: in response to the occurrence of the secondary cell group wireless link failure, sending a reconstruction request message to the network device to perform the secondary cell group Group connection reestablished.

In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the occurrence of failure includes one or more of the following: in response to the execution of secondary cell group mobility and secondary cell group mobility. If the cell group fails, select a cell for failure recovery; when the cell for failure recovery is a cell in the fourth candidate secondary cell group, perform secondary cell group failure recovery based on the configuration of the fourth candidate secondary cell group; wherein , the fourth candidate secondary cell group is a secondary cell group associated with the primary cell group currently accessed by the terminal equipment.

In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the occurrence of the failure includes one or more of the following: in response to the primary cell group mobility and the secondary cell group mobility occurring. If the cell group fails and the secondary cell group fails, the cell used for failure recovery is selected; when the cell used for failure recovery is a cell in the fifth candidate primary cell group, based on the configuration of the fifth candidate primary cell group and the fifth candidate The secondary cell group is configured to perform primary cell group failure recovery and secondary cell group failure recovery; wherein the fifth candidate secondary cell group is the secondary cell group associated with the fifth candidate primary cell group.

In one implementation, the mobility configuration of a cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the trigger condition of the candidate primary cell group, and/or , candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: the mobility configuration of the candidate secondary cell group associated with the candidate primary cell group; the mobility configuration of the candidate secondary cell group includes: candidate The triggering conditions of the secondary cell group, and/or the configuration of the candidate secondary cell group.

In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the occurrence of failure includes one or more of the following: in response to the execution of secondary cell group mobility and secondary cell group mobility. If the cell group fails, select the target secondary cell group from the mobility configuration of the primary cell group currently accessed by the terminal device, where the trigger condition of the target secondary cell group is met; based on the target secondary cell group configuration, perform secondary cell group Group failure recovery.

In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the occurrence of the failure includes one or more of the following: in response to the primary cell group mobility and the secondary cell group mobility occurring. If the cell group fails, select a cell for failure recovery; when the cell for failure recovery is a cell in the sixth candidate primary cell group, perform primary cell group failure recovery based on the configuration of the sixth candidate primary cell group; store The triggering conditions and configuration of the candidate secondary cell group in the sixth candidate primary cell group configuration; when the triggering conditions of the sixth candidate secondary cell group in the sixth candidate primary cell group configuration are met, based on the sixth candidate secondary cell group Configure and access the sixth candidate secondary cell group.

In one implementation, the mobility of the candidate primary cell group is the conditional switching CHO of the candidate primary cell group; the mobility of the candidate secondary cell group associated with the candidate primary cell group is the candidate secondary cell group. The conditional primary and secondary cells of the cell group change the CPC or the conditional primary and secondary cells add CPA.

In one implementation, the mobility of the candidate primary cell group is the selective activation of the cell group of the candidate primary cell group; the mobility of the candidate secondary cell group associated with the candidate primary cell group is the The cell group of the candidate secondary cell group is selectively activated.

In one implementation, the failure includes: primary cell group failure, and/or secondary cell group failure; the primary cell group failure includes at least one of the following failures: primary cell group wireless link failure, primary cell group failure, Cell group conditional handover failure, primary cell group activation failure, primary cell group synchronization reconfiguration failure; the secondary cell group failure includes at least one of the following failures: secondary cell group wireless link failure, conditional primary and secondary cell change failure, Conditions: The addition of the primary and secondary cells failed, the activation of the secondary cell group failed, and the synchronization reconfiguration of the secondary cell group failed.

In an implementation manner, in failure recovery based on the mobility configuration of the cell group, the method of selecting the cell for failure recovery includes at least one of the following methods: performing cell selection during the reconstruction process to obtain the cell for failure recovery. The restored cell; select the cell for failure recovery from the mobility configuration of the cell group according to the network configuration; select the cell for failure recovery from the mobility configuration of the cell group according to the protocol; implement the recovery from the cell group according to the terminal equipment Select the target cell for failure recovery in the mobility configuration.

In this technical solution, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group; wherein the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group, so that When the network device configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal device at the same time, the terminal device can perform failure recovery processing to facilitate the terminal device to perform failure recovery based on the mobility configuration of the cell group.

In the second aspect, embodiments of the present application provide another failure recovery method, which is executed by a network device. The method includes: sending a mobility configuration of a cell group to a terminal device; wherein the failure recovery process of the terminal device is based on The mobility configuration of the cell group; wherein the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.

In an implementation manner, the method further includes: configuring a method for selecting a cell for failure recovery for the terminal device to perform failure recovery based on the mobility configuration of the cell group; the selecting a cell for failure recovery. The method includes at least one of the following methods: performing cell selection during the reconstruction process to obtain the cell for failure recovery; selecting the cell for failure recovery from the mobility configuration of the cell group according to the network configuration; following the protocol provisions The cell used for failure recovery is selected from the mobility configuration of the cell group; the cell used for failure recovery is selected from the mobility configuration of the cell group according to the terminal equipment implementation.

In this technical solution, the mobility configuration of the cell group is sent to the terminal device; wherein the failure recovery process of the terminal device is based on the mobility configuration of the cell group; wherein the mobility configuration of the cell group includes candidate primary The mobility configuration of the cell group and the mobility configuration of the candidate secondary cell group, thereby configuring the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal device at the same time, so that the terminal device can configure the mobility configuration of the MCG and the mobility configuration of the SCG. When configured at the same time, failure recovery processing is performed to facilitate failure recovery of terminal equipment based on the mobility configuration of the cell group.

In a third aspect, embodiments of the present application provide a communication device that has some or all of the functions of the terminal device in implementing the method described in the first aspect. For example, the functions of the communication device may have some or all of the functions in this application. The functions in the embodiments may also be used to independently implement any of the embodiments in this application. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one implementation, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may further include a storage module coupled to the transceiver module and the processing module, which stores necessary computer programs and data for the communication device.

As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

In the fourth aspect, embodiments of the present application provide another communication device that has some or all of the functions of the network device in the method example described in the second aspect. For example, the functions of the communication device may have some of the functions in this application. Or the functions in all embodiments may also be used to implement any one embodiment of the present application independently. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In a fifth aspect, embodiments of the present application provide a communication device. The communication device includes a processor. When the processor calls a computer program in a memory, it executes the method described in the first aspect.

In a sixth aspect, embodiments of the present application provide a communication device. The communication device includes a processor. When the processor calls a computer program in a memory, it executes the method described in the second aspect.

In a seventh aspect, embodiments of the present application provide a communication device. The communication device includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory, so that the communication device executes The method described in the first aspect above.

In an eighth aspect, embodiments of the present application provide a communication device. The communication device includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory, so that the communication device executes The method described in the second aspect above.

In a ninth aspect, embodiments of the present application provide a communication device. The device includes a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor. The processor is used to run the code instructions to cause the The device performs the method described in the first aspect.

In a tenth aspect, embodiments of the present application provide a communication device. The device includes a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor. The processor is used to run the code instructions to cause the The device performs the method described in the second aspect above.

In an eleventh aspect, embodiments of the present application provide a communication system, which includes the communication device described in the third aspect and the communication device described in the fourth aspect, or the system includes the communication device described in the fifth aspect and The communication device according to the sixth aspect, or the system includes the communication device according to the seventh aspect and the communication device according to the eighth aspect, or the system includes the communication device according to the ninth aspect and the communication device according to the tenth aspect. the above-mentioned communication device.

In a twelfth aspect, embodiments of the present invention provide a computer-readable storage medium for storing instructions used by the above-mentioned terminal equipment. When the instructions are executed, the terminal equipment is caused to execute the above-mentioned first aspect. method.

In a thirteenth aspect, embodiments of the present invention provide a readable storage medium for storing instructions used by the above-mentioned network device. When the instructions are executed, the network device is caused to perform the method described in the second aspect. .

In a fourteenth aspect, the present application also provides a computer program product including a computer program, which when run on a computer causes the computer to execute the method described in the first aspect.

In a fifteenth aspect, the present application also provides a computer program product including a computer program, which when run on a computer causes the computer to execute the method described in the second aspect.

In a sixteenth aspect, the present application provides a chip system, which includes at least one processor and an interface for supporting the terminal device to implement the functions involved in the first aspect, for example, determining or processing the data involved in the above method. and information. In a possible design, the chip system further includes a memory, and the memory is used to store necessary computer programs and data for the terminal device. The chip system may be composed of chips, or may include chips and other discrete devices.

In a seventeenth aspect, this application provides a chip system, which includes at least one processor and an interface for supporting network equipment to implement the functions involved in the second aspect, for example, determining or processing the data involved in the above method. and information. In a possible design, the chip system further includes a memory, and the memory is used to store necessary computer programs and data for the network device. The chip system may be composed of chips, or may include chips and other discrete devices.

In an eighteenth aspect, the present application provides a computer program that, when run on a computer, causes the computer to execute the method described in the first aspect.

In a nineteenth aspect, this application provides a computer program that, when run on a computer, causes the computer to execute the method described in the second aspect.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present application or the background technology, the drawings required to be used in the embodiments or the background technology of the present application will be described below.

Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application;

Figure 2 is a schematic flowchart of a failure recovery method provided by an embodiment of the present application;

Figure 3 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 4 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 5 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 6 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 7 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 8 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 9 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 10 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 11 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application;

Figure 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 13 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

Figure 14 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

Figure 15 is a schematic structural diagram of a chip provided by an embodiment of the present application.

Detailed ways

To facilitate understanding, the terminology involved in this application is first introduced.

1.MR-DC

In MR-DC (Multi-Radio Dual Connectivity, multi-radio dual connectivity), terminal equipment can utilize radio resources provided by two different schedules, which are located in two different NG-RAN (5G Radio Access Network) nodes On, over non-ideal backhaul connections, one provides NR access and the other provides E-UTRA or NR access. One serves as MN (Master Node, primary node) and the other serves as SN (Secondary Node, secondary node). MNs and SNs are connected through network interfaces, at least one of which is connected to the core network.

2. MR-DC with EPC

E-UTRAN (Evolved UMTS Terrestrial Radio Access Network, Evolved UMTS Terrestrial Radio Access Network) supports MR-DC through E-UTRA-NR DC (EN-DC), in which the terminal device is connected to an eNB acting as MN and an eNB acting as MN. SN's en-gNB. The eNB is connected to the EPC (4G core network) through the S1 interface and to the en-gNB through the X2 interface. en-gNB can also be connected to the EPC through the S1-U interface and to other en-gNBs through the X2-U interface.

3. E-UTRA-NR Dual Connectivity NGEN-DC

NG-RAN supports NG-RAN E-UTRA-NR dual connectivity (NGEN-DC), in which the terminal device is connected to one ng-eNB as the MN and one gNB as the SN. ng-eNB is connected to 5GC (5G core network), and gNB is connected to ng-eNB through the Xn interface.

4. NR-E-UTRA Dual Connectivity NE-DC

NG-RAN supports NR-E-UTRA DC (NE-DC), where the terminal device is connected to a gNB acting as MN and an ng-eNB acting as SN. gNB is connected to 5GC, and ng-eNB is connected to gNB through Xn interface.

5. NR-NR Dual Connectivity

NG-RAN supports NR-NR DC (NR-DC), where the terminal device is connected to one gNB acting as MN and another gNB acting as SN. The primary gNB is connected to the 5GC through the NG interface, the two gNBs are connected through the Xn interface, and the secondary gNB can also be connected to the 5GC through the NG-U interface. In addition, NR-DC can also be used for terminal equipment to access a single gNB, serve as MN and SN at the same time, and configure MCG and SCG at the same time.

Among them, under dual connectivity, terminal equipment can access two cell groups, namely the primary cell group MCG and the secondary cell group SCG. Under MCG, there may be many cells, one of which is used to initiate initial access. This cell is called PCell (Primary Cell). As the name suggests, PCell is the most "main" cell in MCG. PCell under MCG and SCell (Secondary Cell) under MCG are united through carrier aggregation CA. The primary cell in MCG is PCell and the secondary cell is SCell; the primary and secondary cell in SCG is PSCell (Primary Secondary Cell) and the secondary cell is SCell. Because a lot of signaling is only sent on PCell and PSCell, for the convenience of description, the protocol also defines a concept sPCell (special Cell). PCell and PSCell are collectively called sPCell.

6. Mobility management based on conditional triggering

In condition-triggered mobility management, the terminal device implements condition-triggered mobility management based on the conditions configured by the network device and the associated candidate cells. After the terminal device meets the conditions, it triggers mobility management and accesses its associated Candidate area. The conditions configured by the network device can be specific events based on measurement results, or events based on location or time. The associated candidate cells can be candidate primary cells and primary and secondary cells, which respectively correspond to the corresponding condition-triggered mobility management CHO (Conditional Handover, conditional handover) and CPC (Conditional PSCell Change, conditional primary and secondary cell change)/CPA ( Conditional PSCell Addition, conditional primary and secondary cell addition). Currently, R17 supports MN-initiated CHO, MN-initiated CPA/CPC, and SN-initiated CPC.

7. Selective activation of cell groups

In the corresponding mobility enhancement project, the selective activation of cell groups in MR-DC was proposed. Unlike CHO, CPA/CPC, it can make the CG (Cell group) change. , subsequent configurations can still be performed without the need for network equipment reconfiguration or reinitialization of the corresponding cell group selective activation configuration. This can reduce signaling overhead and interruption duration for CG changes.

That is, in cell group selective activation, after activating a new cell group configuration, the terminal device will not delete the corresponding cell group selective activation configuration.

In selective activation of a cell group, the terminal device can activate or deactivate the preconfigured candidate cell group or cells according to the configuration (such as activation message) issued by the network device or the corresponding activation event, without the need to re-provide the cell group. Configuration. In other words, in cell group selective activation, after activating a new cell or cell group, or applying a new cell configuration or cell group configuration, or after accessing a new cell or cell group, the terminal device will not delete the corresponding cell. Configuration information for group selective activation.

Selective activation of cell groups can also be called cell group activation. It can enable the corresponding configuration information to still be executed after the cell group or cell is changed, without the need for network reconfiguration or re-initialization of the corresponding cell group activation configuration information. This can reduce signaling overhead and downtime for cell group changes. The configuration information for cell group activation may include: a configuration ID and the configuration of the target cell or the configuration of the target cell group. Optionally, the configuration information for cell group activation may also include trigger conditions (which may also be called execution conditions and activation conditions). The network in the embodiment of this application may refer to a network device.

In one embodiment, cell group activation is a mobility management process, including any activation configuration by configuring a cell group. The terminal device activates according to the signaling sent by the network, or the criteria specified by the protocol, or by the terminal device autonomously. Or deactivate the corresponding cell or cell group, or apply the corresponding cell configuration or cell group configuration or access the mobility management process of the cell or cell group.

In one embodiment, cell group activation is a mobility management process, including any mobility management process that does not delete or release corresponding part or all of the configuration information after executing the mobility process. Not deleting or releasing the corresponding part or all of the configuration information can also be called retaining the corresponding part or all of the configuration information.

Among them, the mobility process includes but is not limited to one or more of the following: selective activation of cell groups, and mobility management based on condition triggering.

Exemplarily, the mobility process is cell group selective activation. When the terminal device performs failure recovery based on the configuration information used for mobility, the cell group selective activation is performed, and/or the cell correspondence used for failure recovery is applied. The target cell group configuration.

Wherein, the target cell group configuration may be configuration information stored by the terminal device. For example, information stored in terminal device variables for selective activation configuration information of a cell group.

For example, the terminal device may store the selective activation configuration information for the cell group corresponding to different candidate cell groups, and the selective activation configuration information for the cell group corresponding to each candidate cell group includes the configuration of this candidate cell group. (Can be represented by RRC reconfiguration message). When the terminal device selects a certain candidate cell group as the target cell group, the terminal device applies the configuration of the candidate cell group (ie, the target cell group). If indicated by an RRC reconfiguration message, apply this RRC reconfiguration, perform corresponding terminal equipment behavior, and try to access the target cell group.

Exemplarily, the mobility process is condition-triggered mobility management, including one or more of CHO, CPA, and CPC. When the terminal device performs failure recovery based on the configuration information for mobility, CHO is executed. and/or CPC/CPA and/or, apply the target cell group configuration corresponding to the cell used for failure recovery.

Wherein, the target cell group configuration may be a configuration stored by the terminal device. For example, the configuration information stored in the terminal device variables of the CHO/CPC/CPA configuration. For example, this terminal device variable can be VarConditionalReconfig, which can contain the configuration of CHO/CPC/CPA of multiple candidate cell groups (or cells), which contains the configuration of the corresponding candidate cell group. When this candidate cell group is used for failure When the target cell group corresponding to the restored cell is determined, the configuration of this candidate cell group is determined to be the target cell group configuration.

For example, the terminal device may store the mobility management configuration information for condition-triggered based on different candidate cell groups, and the mobility management configuration for condition-triggered based on each candidate cell group includes the configuration information of this candidate cell group. Configuration (can be represented by RRC reconfiguration message). When the terminal device selects a certain candidate cell group as the target cell group, the terminal device applies the configuration of the candidate cell group (ie, the target cell group). If indicated by an RRC reconfiguration message, apply this RRC reconfiguration, perform corresponding terminal equipment behavior, and try to access the target cell group. For CHO, CPA, and CPC, the configuration of this candidate cell group can be the configuration in the parameter condReconfigList.

In condition-based mobility management, the terminal device implements condition-triggered mobility management based on network configuration conditions and associated candidate cells. After the terminal device meets the conditions, it triggers mobility management and accesses its associated candidate cells. community. The network configuration conditions can be specific events based on measurement results, or events based on location or time. The associated candidate cells may be candidate primary cells and primary and secondary cells, which respectively correspond to the corresponding condition-triggered mobility management CHO and CPC/CPA. Currently, MN-initiated CHO, MN-initiated CPA/CPC, and SN-initiated CPC are supported. Among them, "/" in the embodiment of this application means "or".

The configurations of CHO and CPA/CPC respectively include the corresponding configuration ID, execution conditions and configuration of candidate target cells.

However, configuring CHO and CPA/CPC at the same time is currently not supported. In order to improve robustness and reduce the impact on the throughput of the terminal device, CHO can be combined with CPC/CPA. For example, CHO includes the target MCG and the candidate SCG for CPC/CPA.

The cell group may be one or more of a primary cell group (MCG) and a secondary cell group (SCG). The MCG may include one or more of a primary cell (Primary Cell, PCell) and a secondary cell (Secondary Cell, SCell). Among them, the SCG may include one or more of a Primary Secondary Cell (PSCell) and a Secondary Cell (SCell).

Cell group selective activation may include cell selective activation or cell activation, for example, one or more of PCell activation, PSCell activation, and SCell activation.

It should be noted that in this application, the failure recovery method provided in any embodiment can be executed alone, or in combination with possible implementation methods in other embodiments, or in combination with any technical solution in related technologies. are executed together.

In order to better understand the failure recovery method disclosed in the embodiment of the present application, the communication system to which the embodiment of the present application is applicable is first described below.

Please refer to Figure 1. Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application. The communication system may include but is not limited to one network device and one terminal device. The number and form of devices shown in Figure 1 are only for examples and do not constitute a limitation on the embodiments of the present application. In actual applications, two or more devices may be included. Network equipment, two or more terminal devices. The communication system shown in Figure 1 includes a network device 101 and a terminal device 102 as an example.

It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems. For example: long term evolution (LTE) system, fifth generation (5th generation, 5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems.

The network device 101 in the embodiment of this application is an entity on the network side that is used to transmit or receive signals. For example, the network device 101 can be an evolved base station (evolved NodeB, eNB), a transmission point (transmission reception point, TRP), a next generation base station (next generation NodeB, gNB) in an NR system, or other base stations in future mobile communication systems. Or access nodes in wireless fidelity (WiFi) systems, etc. The embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment. The network equipment provided by the embodiments of this application may be composed of a centralized unit (central unit, CU) and a distributed unit (DU). The CU may also be called a control unit (control unit). CU-DU is used. The structure can separate the protocol layers of network equipment, such as base stations, and place some protocol layer functions under centralized control on the CU. The remaining part or all protocol layer functions are distributed in the DU, and the CU centrally controls the DU.

The terminal device 102 in the embodiment of this application is an entity on the user side that is used to receive or transmit signals, such as a mobile phone. Terminal equipment can also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT), etc. The terminal device can be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality ( augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical surgery, smart grid ( Wireless terminal equipment in smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, wireless terminal equipment in smart home, etc. The embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.

It can be understood that the communication system described in the embodiments of the present application is to more clearly illustrate the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. As those of ordinary skill in the art will know, With the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

The failure recovery method and device provided by this application will be introduced in detail below with reference to the accompanying drawings.

Please refer to Figure 2. Figure 2 is a schematic flowchart of a failure recovery method provided by an embodiment of the present application. This method can be performed by the terminal device in Figure 1. As shown in Figure 2, the method may include but is not limited to the following steps:

Step S201: In response to the occurrence of a failure, perform failure recovery based on the mobility configuration of the cell group; wherein the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.

In this embodiment of the present application, the failure may include a cell group failure, and the cell group includes cells. That is, the cell group failure may include a cell failure. Among them, the cell group may include a primary cell group and a secondary cell group, the primary cell group may include a primary cell and a secondary cell, and the secondary cell group may include a primary cell group and a secondary cell. That is, the failure of the cell group may be the failure of the primary cell group or the failure of the primary cell group. The secondary cell group fails. The cell failure can be the failure of the primary cell in the primary cell group, or the failure of the primary and secondary cells in the secondary cell group. The cell failure may also be the failure of the secondary cell, for example, the secondary cell in the primary cell group, or the failure of the secondary cell in the secondary cell group.

Among them, failure also includes failure to perform failure recovery. In one implementation, when the terminal device fails to perform failure recovery by reporting failure information, it enters the idle state, or falls back to the source primary cell group configuration, or triggers a reconstruction process, or uses cell group-based mobility. Configure failure recovery.

The primary cell group failure may include but is not limited to at least one of the following failures: primary cell group wireless link failure, primary cell group conditional handover failure, primary cell group activation failure, primary cell group synchronization reconfiguration failure.

The failure of the secondary cell group may include but is not limited to at least one of the following failures: secondary cell group wireless link failure, conditional primary and secondary cell change failure, conditional primary and secondary cell addition failure, secondary cell group activation failure, secondary cell group failure Synchronous reconfiguration failed.

In some embodiments, failure may also include but is not limited to any one or more of the following. When one or more of the following failures are detected, the terminal device may perform failure recovery based on the mobility configuration of the cell group:

MCG wireless link failure is detected and t316 is not configured; MCG wireless link failure is detected and SCG transmission is suspended; MCG wireless link failure is detected during PSCell change or PSCell addition process; synchronization reconfiguration failure occurs in MCG; NR mobile Sexual failure; when the integrity check failure indication comes from the lower layer and is related to SRB1 or SRB2, in addition to the integrity check failure being detected in the RRC reestablishment message; RRC connection reconfiguration fails; the wireless link of the SCG is detected while the MCG transmission is suspended. path failure; when MCG transfer hangs and SCG synchronization failure reconfiguration; when MCG transfer hangs, SCG change fails; when MCG transfer hangs SCG configuration failure occurs; when MCG hangs and SCG lower layer about SRB3 Integrity check failure indication; when T316 expires.

In some embodiments, the wireless link failure of the primary cell group may cause the failure timer corresponding to the primary cell in the primary cell group to expire. The wireless link failure of the secondary cell group may be caused by the timeout of the corresponding failure timer of the primary cell in the secondary cell group. Among them, the failure timer can be T310 or T312, that is to say, as long as one timer times out, the wireless link will fail.

In some embodiments, the terminal detects wireless link failure RLF, including but not limited to any one or more of the following situations: In the first situation, when timer T310 expires in PCell/PSCell, it is determined that RLF is detected. In the second case, when timer T312 expires in PCell/PSCell, it is determined that RLF is detected. In the third case, when timers T300, T301, T304, T311 and T319 are not running, MCG MAC issues a random access problem indication; or when SCG RLC indicates that the maximum number of retransmissions has been reached, RLF is determined to be detected. In the fourth case, when the MCG/SCG RLC indicates that the maximum number of retransmissions has been reached, RLF is determined to be detected. In the fifth case, if connected as an IAB node, after receiving the BH RLF indication on the BAP entity from the MCG/SCG, it is determined that RLF is detected. In the sixth case, when timer T304 is not running, the MCG MAC sends a consistent uplink LBT fault indication; or the SCG MAC sends a consistent uplink LBT fault indication, confirming that RLF is detected.

It should be noted that the failure of the primary cell group may refer to the failure of the primary cell group or the failure of a cell in the primary cell group. The failure of the secondary cell group may refer to the failure of the secondary cell group or the failure of the cells in the secondary cell group.

Among them, the primary cell group can only include the primary cell, and the failure of the primary cell group can lead to the failure of the primary cell; the secondary cell group can only contain primary and secondary cells, and the failure of the secondary cell group can lead to the failure of the primary and secondary cells.

The candidate cell group refers to the optional cell group provided in the mobility configuration of the cell group. When the terminal device selects one of the candidate cell groups based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group becomes the currently accessed cell group.

In the embodiment of the present application, in one example, the mobility of the candidate primary cell group is the conditional switching of CHO for the candidate primary cell group; the mobility of the candidate secondary cell group is the conditional primary and secondary cell change of the candidate secondary cell group. CPC or conditional primary and secondary cells add CPA. Wherein, the candidate primary cell group and the candidate secondary cell group have an associated relationship, or the candidate primary cell group and the candidate secondary cell group do not have an associated relationship.

For example, if the network device is configured with CHO+CPA/CPC, its associated CPA/CPC will be executed while executing CHO.

In another example, the mobility of the candidate primary cell group is the selective activation of the cell group of the candidate primary cell group; the mobility of the candidate secondary cell group is the selective activation of the cell group of the candidate secondary cell group. Wherein, the candidate primary cell group and the candidate secondary cell group have an associated relationship, or the candidate primary cell group and the candidate secondary cell group do not have an associated relationship.

For example, the network device is configured with MCG and SCG selective activation. When MCG and SCG selective activation are triggered, the UE activates MCG and SCG at the same time.

In the embodiment of the present application, in failure recovery based on the mobility configuration of the cell group, the method of selecting a cell for failure recovery includes at least one of the following methods: performing cell selection during the reconstruction process to obtain the cell for failure recovery. Cell; select the cell for failure recovery from the mobility configuration of the cell group according to the network configuration; select the cell for failure recovery from the mobility configuration of the cell group according to the protocol; implement mobility from the cell group according to the terminal equipment This solution does not limit the selection of target cells for failure recovery in the configuration; or other methods of selecting cells for failure recovery.

For example, when the terminal device selects the target cell to be accessed (the target cell used for failure recovery) for failure recovery, the selection method includes but is not limited to: (1) During the reconstruction process, perform cell selection to select the selected cell; ( 2) Select a candidate target cell for failure recovery from the candidate target cells configured in the network according to the network configuration, protocol regulations or terminal equipment implementation.

In this embodiment of the present application, the mobility configuration of the cell group may be the mobility configuration stored in the terminal device; the mobility configuration of the cell group may also be called mobility configuration.

In one example, when receiving a message containing mobility configuration sent by a network device, the terminal device stores or updates the stored mobility configuration according to the message sent by the network device.

In one example, the terminal device uses terminal variables to store mobility configurations. The terminal variables may be UE variables or may be called Var variables.

In this embodiment of the present application, the mobility configuration stored by the terminal device may include the mobility configuration of the candidate primary cell group and/or the mobility configuration of the candidate secondary cell group.

In the embodiment of the present application, the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group exist at the same time, which means that the network device configures the terminal device to perform MCG and SCG mobility at the same time. In some embodiments, the network device configuring the terminal device to simultaneously configure CHO+CPA/CPC may include at least one of the following situations:

1. The configurations of CHO and CPA/CPC are included in the same condition reconfiguration entry, corresponding to the same condition reconfiguration ID:

a) Corresponds to the same execution condition or different execution conditions; b) Corresponds to the same candidate target configuration (one RRCReconfiguration includes the configuration of the target MCG and the configuration of the target SCG) or different candidate target configurations.

2. The configurations of CHO and CPA/CPC are independent conditional reconfiguration entries, but they are related.

3. The configuration of the candidate target cell of CHO includes the configuration of its associated CPA/CPC, that is, the execution conditions of the corresponding CPA/CPC and the configuration of the candidate PSCell.

In some embodiments, the network device configuring the terminal device to selectively activate MCG and SCG at the same time may include at least one of the following situations:

1. The configurations of MCG activation and SCG activation are included in the selective activation entries of the same cell group, corresponding to the same activation configuration ID:

a) Corresponds to the same activation condition or different activation conditions (activation conditions may be configured); b) Corresponds to the same "cell to be activated" configuration (one RRCReconfiguration contains the configuration of the target MCG and the configuration of the target SCG) or different " Cell to be activated" configuration.

2. The configurations of MCG activation and SCG activation are independent conditional reconfiguration entries, but they are related.

3. The "cell to be activated" configuration of the MCG includes the configurations of multiple SCG "cells to be activated" associated with it.

In the embodiment of this application, in one example, the mobility configuration of the candidate primary cell group exists in the mobility configuration of one cell group; the mobility configuration of the candidate secondary cell group exists in the mobility configuration of another cell group. in sexual configuration. Wherein, the candidate primary cell group and the candidate secondary cell group have an associated relationship, or the candidate primary cell group and the candidate secondary cell group do not have an associated relationship. Wherein, the mobility configuration of a cell group may be an entry in a list of mobility configurations stored for the terminal device.

In another example, the mobility configuration of a single cell group includes: trigger conditions, and/or cell group configuration; wherein the cell group configuration includes: candidate primary cell group configuration and candidate secondary cells associated with the candidate primary cell group. Cell group configuration. In one example, the triggering condition may include a triggering condition for a candidate primary cell group and a triggering condition for a candidate secondary cell group. In another example, there may be one triggering condition, which is shared by the candidate primary cell group and the candidate secondary cell group. That is to say, the triggering condition of the candidate primary cell group and the triggering condition of the candidate secondary cell group are the same. The mobility configuration of a single cell group may be an entry in a list of mobility configurations stored for the terminal device.

In another example, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the triggering condition of the candidate primary cell group, and/or, Candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group. Wherein, the mobility configuration of the singled cell group may be an entry in a mobility configuration list stored for the terminal device.

In another example, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the triggering condition of the candidate primary cell group, and/or, Candidate primary cell group configuration; wherein, the candidate primary cell group configuration includes: the mobility configuration of the candidate secondary cell group associated with the candidate primary cell group; the candidate secondary cell group mobility configuration includes: the trigger conditions of the candidate secondary cell group, and/or, candidate secondary cell group configuration. The mobility configuration of a single cell group may be an entry in a list of mobility configurations stored for the terminal device.

In the failure recovery method of the embodiment of the present application, in response to a failure, the terminal device performs failure recovery based on the mobility configuration of the cell group; wherein the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the candidate secondary cell group. Mobility configuration, so that when the network device configures the mobility configuration of MCG and the mobility configuration of SCG for the terminal device at the same time, the terminal device can perform failure recovery processing, which facilitates the terminal device to perform failure recovery based on the mobility configuration of the cell group.

It should be noted that the above possible implementation methods can be executed individually or in combination, and the embodiments of the present application do not limit this.

Please refer to Figure 3. Figure 3 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1.

The failure recovery method can be executed alone, or in combination with any embodiment or possible implementation in the embodiment, or in combination with any technical solution in related technologies. implement.

In this embodiment of the present application, the mobility configuration of the candidate primary cell group exists in the mobility configuration of one cell group; the mobility configuration of the candidate secondary cell group exists in the mobility configuration of another cell group. Among them, the candidate primary cell group and the candidate secondary cell group have an associated relationship, or the candidate primary cell group and the candidate secondary cell group do not have an associated relationship. Wherein, the mobility configuration of a cell group may be an entry in a list of mobility configurations stored for the terminal device.

Based on the mobility configuration of the cell group in the above example, as shown in Figure 3, the method may include but is not limited to the following steps:

Step S301: In response to occurrence of secondary cell group failure, select a cell for failure recovery.

In the embodiment of the present application, in failure recovery based on the mobility configuration of the cell group, the method of selecting a cell for failure recovery includes at least one of the following methods: performing cell selection during the reconstruction process to obtain the cell for failure recovery. Cell; select the cell for failure recovery from the mobility configuration of the cell group according to the network configuration; select the cell for failure recovery from the mobility configuration of the cell group according to the protocol; implement mobility from the cell group according to the terminal equipment This solution does not limit the selection of target cells for failure recovery in the configuration; or other methods of selecting cells for failure recovery. Among them, the cell selected for failure recovery can be the primary and secondary cells.

In one example, in response to a secondary cell group failure occurring, the terminal device may perform cell selection during the reestablishment process to obtain a primary and secondary cell for failure recovery.

In another example, in response to a secondary cell group failure occurring, the terminal device may select a primary and secondary cell for failure recovery from the mobility configuration of the cell group according to the network configuration.

In another example, in response to the occurrence of a secondary cell group failure, the terminal device may select a primary and secondary cell for failure recovery from the mobility configuration of the cell group as specified in the protocol.

In another example, in response to a secondary cell group failure occurring, the terminal device may select a target primary and secondary cell for failure recovery from the mobility configuration of the cell group according to the terminal device implementation.

Step S302: When the cell used for failure recovery is a cell in the first candidate secondary cell group, perform failure recovery of the secondary cell group based on the first candidate secondary cell group configuration in the mobility configuration of the first candidate secondary cell group.

In this embodiment of the present application, when the cell used for failure recovery is the primary and secondary cells in the first candidate secondary cell group, the terminal device can configure the first candidate secondary cell group based on the mobility configuration of the first candidate secondary cell group, Perform secondary cell group failure recovery. Wherein, the mobility configuration of the first candidate secondary cell group exists in the mobility configuration of one cell group.

The number of first candidate secondary cell groups may be one or more. That is to say, the cells used for failure recovery may be primary and secondary cells in one first candidate secondary cell group, or may be primary and secondary cells in multiple first candidate secondary cell groups.

In one implementation manner, the first candidate secondary cell group is a secondary cell group associated with the primary cell group currently accessed by the terminal device.

In an implementation manner, the mobility configuration of the first candidate secondary cell group may be included in the mobility configuration of the secondary cell group stored in the terminal device.

In the embodiment of the present application, in another example, when the cell used for failure recovery is not a cell in any candidate secondary cell group, the terminal device may send a reconstruction request message to the network device, and the request is related to the cell used for failure recovery. The restored cell reestablishes the RRC connection or enters the idle state.

For example, when the configuration of the candidate target PCell corresponding to MCG mobility is independent of the configuration of the candidate target PSCell corresponding to SCG mobility, the terminal device can apply the corresponding configuration when performing MCG failure recovery and/or SCG failure recovery. The configuration of the candidate target PCell, and/or the configuration of the candidate target PSCell.

In the above example, when performing SCG failure recovery, only if the selected PSCell to be accessed is the PSCell corresponding to the SCG associated with the MCG connected to the terminal device, the configuration of the corresponding candidate target PSCell can be used for SCG failure recovery. Otherwise, Perform RRC reconstruction or enter IDLE.

It should be noted that after step S301, step S302 may not be executed. For example, after step S301, the terminal device may directly send a reestablishment request message to the network device, requesting to reestablish the RRC connection with the cell used for failure recovery. For another example, after step S301, the terminal device may directly enter the idle state. That is to say, step S301 and step S302 are independent steps, and step S302 may not necessarily be executed after step S301, nor may step S301 be executed before step S302.

The failure recovery method of the embodiment of the present application selects a cell for failure recovery in response to a secondary cell group failure; when the cell for failure recovery is a cell in the first candidate secondary cell group, based on the first candidate secondary cell The first candidate secondary cell group configuration in the group's mobility configuration performs secondary cell group failure recovery, where the mobility configuration of the candidate primary cell group exists in the mobility configuration of a cell group; the mobility of the candidate secondary cell group configuration, exists in the mobility configuration of another cell group, so that when the network device configures the mobility configuration of MCG and the mobility configuration of SCG for the terminal device at the same time, the terminal device can fail for the secondary cell group, based on the cell group The mobility configuration is used to perform secondary cell group failure recovery processing.

In an implementation manner: mobility configurations of different candidate secondary cell groups may exist in different cell group mobility configuration entries. For example, the mobility configuration of candidate secondary cell group A exists in the mobility configuration of a cell group. , the mobility configuration of candidate secondary cell group B exists in the mobility configuration of another cell group.

Please refer to Figure 4. Figure 4 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1.

In the embodiment of the present application, in one example, the mobility configuration of a single cell group includes: trigger conditions, and/or cell group configuration; wherein the cell group configuration includes: candidate primary cell group configuration and candidate primary cell group configuration. Candidate secondary cell group configuration associated with the cell group. The mobility configuration of a single cell group may be an entry in a list of mobility configurations stored for the terminal device.

In one example, the triggering condition may include a triggering condition for a candidate primary cell group and a triggering condition for a candidate secondary cell group. In another example, there may be one triggering condition, which is shared by the candidate primary cell group and the candidate secondary cell group. That is to say, the triggering condition of the candidate primary cell group and the triggering condition of the candidate secondary cell group are the same.

In another example, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the triggering condition of the candidate primary cell group, and/or, Candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group.

Wherein, the mobility configuration of the candidate secondary cell group includes: the triggering condition of the candidate secondary cell group, and/or the candidate secondary cell group configuration.

Based on the mobility configuration of the cell group in the above two examples, as shown in Figure 4, the method may include but is not limited to the following steps:

Step S401: In response to occurrence of primary cell group failure, select a cell for failure recovery.

In the embodiment of the present application, in failure recovery based on the mobility configuration of the cell group, the method of selecting a cell for failure recovery includes at least one of the following methods: performing cell selection during the reconstruction process to obtain the cell for failure recovery. Cell; select the cell for failure recovery from the mobility configuration of the cell group according to the network configuration; select the cell for failure recovery from the mobility configuration of the cell group according to the protocol; implement mobility from the cell group according to the terminal equipment This solution does not limit the selection of target cells for failure recovery in the configuration; or other methods of selecting cells for failure recovery. Among them, the cell selected for failure recovery can be the main cell.

Step S402: When the cell used for failure recovery is a cell in the second candidate primary cell group, release the secondary cell group currently accessed by the terminal device, and/or based on the configuration of the second candidate primary cell group and the second candidate secondary cell group. Cell group configuration, primary cell group failure recovery and secondary cell group connection; wherein, the second candidate secondary cell group is the secondary cell group associated with the second candidate primary cell group.

In one example, the terminal device is currently accessed by a secondary cell group, and when the cell used for failure recovery is a cell in the second candidate primary cell group, the terminal device can release the currently accessed secondary cell group; Then, based on the second candidate primary cell group configuration and the second candidate secondary cell group configuration, primary cell group failure recovery and secondary cell group connection are performed.

In another example, the terminal device is not currently connected to the secondary cell group, and when the cell used for failure recovery is a cell in the second candidate primary cell group, the terminal device may be based on the configuration of the second candidate primary cell group and the third The second candidate secondary cell group is configured to perform primary cell group failure recovery and secondary cell group connection.

The number of second candidate secondary cell groups may be one or more. The number of second candidate primary cell groups may be one or more.

In an implementation manner, the second candidate primary cell group configuration may be included in the mobility configuration of the primary cell group stored in the terminal device.

In an implementation manner, the mobility configuration of the second candidate secondary cell group may be included in the mobility configuration of the secondary cell group stored in the terminal device.

For example, when the configuration of the candidate target PCell corresponding to MCG mobility and the configuration of the candidate target PSCell corresponding to SCG mobility are included in the same candidate target configuration (that is, the configuration of the candidate target PCell corresponding to MCG mobility is the same as the configuration of the candidate target PSCell corresponding to SCG mobility). The configuration of the corresponding candidate target PSCell is included in the selective activation entry of the same cell group). When the terminal device recovers from MCG failure, it can only apply the MCG configuration information in this configuration; or it can release the source SCG connection and apply this configuration information. When recovering from an SCG failure, you can only apply the SCG configuration information in this configuration. Among them, the source SCG connection is the SCG connection currently accessed by the terminal device.

For example, when the candidate target cell configuration corresponding to the MCG mobility configuration contains the SCG mobility configuration. If the MCG candidate target configuration contains the triggering conditions for SCG mobility (the RRCReconfiguration corresponding to the CHO contains the conditionalReconfiguration of the associated CPAC), you can select the PSCell for SCG failure recovery based on whether the triggering conditions are met, or perform MCG After failure recovery, the SCG mobility configuration contained therein is applied and triggering events are evaluated.

In the above two examples, when performing MCG failure recovery, if you choose to use the configuration of a certain candidate target PCell for MCG recovery, the terminal device can release the source SCG connection (if any), and the application includes this candidate target PCell and the corresponding The candidate target configuration corresponding to PSCell restores the MCG connection and establishes the corresponding SCG connection at the same time.

For example, the candidate target configuration includes: (1) Configuration of candidate target cells for CHO, CPA/CPC; (2) Configuration of a cell group to be activated for MCG activation and SCG activation.

It should be noted that after step S401, step S402 may not be executed, but other steps may be executed. That is to say, step S401 and step S402 are independent steps, and step S402 may not necessarily be executed after step S401, nor may step S401 be executed before step S402.

The following examples illustrate this. It is assumed that the terminal equipment currently accesses the primary cell PCell0 in the primary cell group MCG0, and currently accesses the primary and secondary cells PSCell0 in the secondary cell group SCG0. Wherein, the terminal device receives the mobility configuration of the cell group sent by the network device. The mobility configuration of a cell group includes: the triggering condition of conditional handover CHO + the triggering condition of conditional primary and secondary cell change CPC, the configuration of the candidate primary cell group (including PCell1) and the configuration of the candidate secondary cell group (including PSCell1). The mobility configuration of another cell group includes: the triggering condition of conditional handover CHO + the triggering condition of conditional primary and secondary cell change CPC, the configuration of the candidate primary cell group (including PCell2) and the configuration of the candidate secondary cell group (including PSCell2).

When the terminal device detects that the wireless link of MCG0 fails, the terminal device performs one or more of the following: initiates the reconstruction process and selects the primary cell for failure recovery in the cell selection; responds to the presence of the primary cell containing the primary cell. The candidate primary cell group performs failure recovery processing based on the configuration of the candidate primary cell group.

Among them, in cell selection, in one example, the primary cell selected for failure recovery can be PCell1, then the terminal device can release PSCell0, and then apply the configuration of the candidate primary cell group (including PCell1) and the candidate secondary cell group ( Including the configuration of PSCell1) for failure recovery processing.

In cell selection, in another example, PCell2 is selected. The terminal device can release PSCell0, and then apply the configuration of the candidate primary cell group (including PCell2) and the configuration of the candidate secondary cell group (including PSCell2) to perform failure recovery processing. .

The failure recovery method in the embodiment of the present application selects a cell for failure recovery in response to a primary cell group failure; when the cell for failure recovery is a cell in the second candidate primary cell group, releases the current access of the terminal device secondary cell group, and/or, based on the second candidate primary cell group configuration and the second candidate secondary cell group configuration, perform primary cell group failure recovery and secondary cell group connection; wherein the second candidate secondary cell group is the The secondary cell group associated with the second candidate primary cell group, so that when the network device configures the mobility configuration of MCG and the mobility configuration of SCG for the terminal device at the same time, and there is an association relationship between MCG and SCG, the terminal device can target the primary cell If the group fails, primary cell group failure recovery processing is performed based on the mobility configuration of the cell group.

Please refer to Figure 5. Figure 5 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1.

Based on the mobility configuration of the cell group in the above two examples, as shown in Figure 5, the method may include but is not limited to the following steps:

Step S501: In response to occurrence of primary cell group failure, select a cell for failure recovery.

Step S502: When the cell used for failure recovery is a cell in the third candidate primary cell group, perform primary cell group failure recovery based on the configuration of the third candidate primary cell group.

The number of third candidate primary cell groups may be one or more. Step S502 may be executed when the primary cell group fails but the secondary cell group fails, or when the primary cell group fails and the secondary cell group fails.

In an implementation manner, the third candidate primary cell group configuration may be included in the mobility configuration of the primary cell group stored in the terminal device.

In addition, if the secondary cell group failure also occurs, the primary and secondary cells for failure recovery can be selected, and the secondary cell group failure recovery is performed based on the candidate secondary cell group configuration including the primary and secondary cells.

Among them, it should be noted that in one implementation, if the primary cell group fails and the third candidate primary cell group configuration and the third candidate secondary cell group configuration associated with the third candidate primary cell group are located in the mobility configuration In the same entry in the list, you can only use the third candidate primary cell group configuration to perform primary cell group failure recovery, while ignoring the third candidate secondary cell group configuration in the entry. For example, when performing MCG failure recovery, if you choose to use the configuration of a certain candidate target PCell for MCG recovery, apply the MCG configuration information in the candidate target configuration, ignore the SCG configuration information, and restore the MCG connection.

In the above two examples, when performing MCG failure recovery, if you choose to use the configuration of a certain candidate target PCell for MCG recovery, apply the MCG configuration information in the candidate target configuration, ignore the SCG configuration information, and restore the MCG connection.

It should be noted that after step S501, step S502 may not be executed, but other steps may be executed. In other words, step S501 and step S502 are independent steps, and step S502 may not necessarily be executed after step S501, nor may step S501 be executed before step S502. Among other steps, for example, in response to the cell used for failure recovery not being a cell in any candidate primary cell group, the terminal device may send a reestablishment request message to the network device, requesting to reestablish the RRC connection with the cell used for failure recovery. , or enter the idle state, which is not specifically limited here.

The failure recovery method in the embodiment of the present application selects a cell for failure recovery in response to a primary cell group failure; when the cell for failure recovery is a cell in the third candidate primary cell group, based on the third candidate primary cell Group configuration to perform primary cell group failure recovery, so that when the network device configures both the mobility configuration of MCG and the mobility configuration of SCG for the terminal device, and there is an association between MCG and SCG, the terminal device can respond to the failure of the primary cell group. , perform secondary cell group failure recovery processing based on the mobility configuration of the cell group.

Please refer to Figure 6. Figure 6 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1. The failure recovery method can be executed alone, or in combination with any embodiment or possible implementation in the embodiment, or in combination with any technical solution in related technologies. implement.

In one example, the triggering condition may include a triggering condition for a candidate primary cell group and a triggering condition for a candidate secondary cell group. In another example, there may be one triggering condition, and the candidate primary cell group and the candidate secondary cell group are shared. That is to say, the triggering condition for the candidate primary cell group and the triggering condition for the candidate secondary cell group are the same.

Based on the mobility configuration of the cell group in the above two examples, as shown in Figure 6, the method may include but is not limited to the following steps:

Step S601: In response to a secondary cell group wireless link failure, send a reestablishment request message to the network device to reestablish the secondary cell group connection.

In this embodiment of the present application, there is an association relationship between the candidate primary cell group and the candidate secondary cell group. When the wireless link of the secondary cell group fails, if the primary and secondary cells are re-selected for failure recovery, the secondary cell group including the primary and secondary cells may not be the secondary cell group associated with the primary cell group currently accessed by the terminal device. Therefore, when the wireless link of the secondary cell group fails, a reestablishment request message can be sent to the network device to reestablish the secondary cell group connection.

In one implementation, when there is an association relationship between the candidate primary cell group and the candidate secondary cell group and the secondary cell group wireless link fails, failure recovery through the mobility configuration of the cell group is not supported or allowed.

In one implementation manner, in response to a wireless link failure of the secondary cell group, when there is an association relationship between the candidate primary cell group and the candidate secondary cell group, the terminal device releases the secondary cell group.

In the above two examples, if SCG failure recovery is required due to SCG RLF, the terminal device can send an RRC reestablishment request message to reestablish the SCG connection.

The failure recovery method in the embodiment of the present application, in response to the occurrence of a secondary cell group wireless link failure, sends a reestablishment request message to the network device to reestablish the secondary cell group connection, thereby configuring the mobility configuration of the MCG when the network device is the terminal device. When the mobility configuration is configured with the SCG and there is an association between the MCG and the SCG, the terminal device can perform connection reestablishment processing in response to the failure of the secondary cell group wireless link.

Please refer to Figure 7, which is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1.

Based on the mobility configuration of the cell group in the above two examples, as shown in Figure 7, the method may include but is not limited to the following steps:

Step S701: In response to a secondary cell group failure occurring in performing primary cell group mobility and secondary cell group mobility, select a cell for failure recovery.

Step S702: When the cell used for failure recovery is a cell in the fourth candidate secondary cell group, perform failure recovery of the secondary cell group based on the configuration of the fourth candidate secondary cell group; wherein the fourth candidate secondary cell group is a terminal device The secondary cell group associated with the currently accessed primary cell group.

The number of fourth candidate secondary cell groups may be one or more. In addition, if the cell used for failure recovery is not a cell in the fourth candidate secondary cell group, a reestablishment request message may be sent to the network device to perform connection reestablishment of the secondary cell group including the cell used for failure recovery.

In an implementation manner, the fourth candidate secondary cell group configuration may be included in the mobility configuration of the secondary cell group stored by the terminal device.

In one implementation manner, the primary cell group currently accessed by the terminal device is a cell group that the terminal device successfully accesses by performing primary cell group mobility.

In the above two examples, if the mobility of MCG and SCG is triggered, MCG access is successful, but SCG fails. If the PSCell in the SCG associated with the successfully accessed MCG is selected for connection recovery, the terminal device can perform the mobility of the aforementioned SCG and apply the corresponding configuration of the SCG in the candidate target configuration.

It should be noted that after step S701, step S702 may not be executed, but other steps may be executed. In other words, step S701 and step S702 are independent steps, and step S702 may not necessarily be executed after step S701, nor step S701 may be executed before step S702.

The failure recovery method of the embodiment of the present application selects a cell for failure recovery in response to a secondary cell group failure that occurs when performing primary cell group mobility and secondary cell group mobility; when the cell used for failure recovery is the fourth candidate secondary cell group When a cell in the cell group is selected, the secondary cell group failure recovery is performed based on the configuration of the fourth candidate secondary cell group; where the fourth candidate secondary cell group is the secondary cell group associated with the primary cell group currently accessed by the terminal device, so that in When the network device configures both the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal device, and there is an association between the MCG and the SCG, if a secondary cell group failure occurs when performing primary cell group mobility and secondary cell group mobility, The terminal equipment can perform failure recovery of the secondary cell group based on the mobility configuration of the cell group.

Please refer to Figure 8. Figure 8 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1.

Based on the mobility configuration of the cell group in the above two examples, as shown in Figure 8, the method may include but is not limited to the following steps:

Step S801: Select a cell for failure recovery in response to primary cell group failure and secondary cell group failure occurring in performing primary cell group mobility and secondary cell group mobility.

For example, the failure of the primary cell group and the failure of the secondary cell group include one or more of the following: (1) MCG RLF; (2) SCG RLF; (3) MCG failure occurs when MCG and SGC mobility are triggered; ( 4) When triggering MCG and SGC mobility, SCG failure occurred; (5) CHO failure; (6) CPA/CPC failure; (7) MCG activation failure; (8) SCG activation failure.

For example, the failure of the primary cell group and the failure of the secondary cell group can be one or more of the following: (1) MCG RLF, SCG RLF; (2) When MCG and SGC mobility are triggered, MCG failure and SCG failure occur; (3) CHO failed, CPA/CPC failed; (4) MCG activation failed, SCG activation failed.

Step S802: When the cell used for failure recovery is a cell in the fifth candidate primary cell group, perform primary cell group failure recovery and secondary cell group failure based on the fifth candidate primary cell group configuration and the fifth candidate secondary cell group configuration. Recovery; wherein, the fifth candidate secondary cell group is the secondary cell group associated with the fifth candidate primary cell group.

The number of fifth candidate primary cell groups may be one or more; the number of fifth candidate secondary cell groups may be one or more. The mobility configuration of the fifth candidate primary cell group may be included in the mobility configuration of the primary cell group stored in the terminal device. The mobility configuration of the fifth candidate secondary cell group may be included in the mobility configuration of the secondary cell group stored in the terminal device.

For example, when the configuration of the candidate target PCell corresponding to MCG mobility and the configuration of the candidate target PSCell corresponding to SCG mobility are included in the same candidate target configuration (that is, the configuration of the candidate target PCell corresponding to MCG mobility is the same as the configuration of the candidate target PSCell corresponding to SCG mobility). The configuration of the corresponding candidate target PSCell is included in the selective activation entry of the same cell group). When the UE performs MCG failure recovery, it can only apply the MCG configuration information in this configuration. Or release the source SCG connection and apply this configuration information. When recovering from an SCG failure, you can only apply the SCG configuration information in this configuration.

In the above two examples, if the mobility of MCG and SCG is triggered and MCG and SCG failures occur at the same time, the terminal device can select the PCell used for failure recovery and its associated PSCell to restore the connection between MCG and SCG. Application selection Candidate target configuration corresponding to PCell and PSCell.

It should be noted that after step S801, step S802 may not be executed, but other steps may be executed. That is to say, step S801 and step S802 are independent steps, and step S802 may not necessarily be executed after step S801, nor may step S801 be executed before step S802.

The failure recovery method of the embodiment of the present application selects a cell for failure recovery in response to the failure of the primary cell group and the failure of the secondary cell group when performing primary cell group mobility and secondary cell group mobility; when the cell used for failure recovery When it is a cell in the fifth candidate primary cell group, primary cell group failure recovery and secondary cell group failure recovery are performed based on the fifth candidate primary cell group configuration and the fifth candidate secondary cell group configuration; where, the fifth candidate secondary cell group , is the secondary cell group associated with the fifth candidate primary cell group. Therefore, when the network device configures the mobility configuration of MCG and the mobility configuration of SCG for the terminal device at the same time, and there is an association relationship between MCG and SCG, if the primary cell is executed Primary cell group failure and secondary cell group failure occur during group mobility and secondary cell group mobility. The terminal device can perform failure recovery of the primary cell group and failure recovery of the secondary cell group based on the mobility configuration of the cell group.

Please refer to Figure 9. Figure 9 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1.

In this embodiment of the present application, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the triggering condition of the candidate primary cell group, and/or, Candidate primary cell group configuration; wherein, the candidate primary cell group configuration includes: the mobility configuration of the candidate secondary cell group associated with the candidate primary cell group; the candidate secondary cell group mobility configuration includes: the trigger conditions of the candidate secondary cell group, and/or, candidate secondary cell group configuration. The mobility configuration of a single cell group may be an entry in a list of mobility configurations stored for the terminal device.

In the mobility configuration of the candidate secondary cell group, the number of candidate secondary cell groups may be multiple, and each candidate secondary cell group corresponds to a triggering condition; the triggering conditions of multiple candidate secondary cell groups may be the same or different.

Based on the mobility configuration of the cell group in the above example, as shown in Figure 9, the method may include but is not limited to the following steps:

Step S901: In response to a secondary cell group failure in performing primary cell group mobility and secondary cell group mobility, select a target secondary cell group from the mobility configuration of the primary cell group currently accessed by the terminal device, where the target secondary cell group The group's trigger conditions are met.

In this embodiment of the present application, the process of selecting the target secondary cell group from the mobility configuration of the primary cell group currently accessed by the terminal device may be: selecting the target secondary cell group from the mobility configuration of the primary cell group currently accessed by the terminal device. The primary and secondary cells that fail to recover will use the secondary cell group including the primary and secondary cells as the target secondary cell group.

The number of target secondary cell groups may be one or more. Wherein, the method of selecting the primary and secondary cells for failure recovery from the mobility configuration of the primary cell group currently accessed by the terminal device may include at least one of the following methods: selecting from the mobility configuration of the cell group according to the network configuration. Primary and secondary cells for failure recovery; select the primary and secondary cells for failure recovery from the mobility configuration of the cell group according to the protocol; select the target primary and secondary cells for failure recovery from the mobility configuration of the cell group according to the terminal equipment implementation Secondary cell; or other methods of selecting primary and secondary cells for failure recovery, this solution is not limited.

Among them, the target cell group refers to the cell group that the terminal device selects to access based on the configuration information used for mobility; after determining the target cell group, the terminal device will perform the corresponding configuration and successfully access the target cell group. , the target cell group becomes the cell group currently accessed by the terminal device. The candidate cell group refers to the optional cell group provided in the mobility configuration of the cell group. When the terminal device selects one of the candidate cell groups based on the mobility configuration of the cell group, the candidate cell group becomes the target cell group.

Step S902: Based on the target secondary cell group configuration, perform secondary cell group failure recovery.

For example, when the candidate target cell configuration corresponding to the MCG mobility configuration contains the SCG mobility configuration. If the MCG candidate target cell configuration contains triggering conditions for SCG mobility (for example, the RRCReconfiguration corresponding to CHO contains the conditionalReconfiguration of the associated CPAC), the PCell for SCG failure recovery can be selected based on whether the triggering conditions are met, or, After MCG failure recovery, apply the SCG mobility configuration contained therein and evaluate the triggering events.

In the above example, when the MCG candidate target cell configuration includes event-triggered SCG mobility configuration, when selecting the PSCell for recovery, select the PSCell that meets the triggering event for SCG recovery.

The failure recovery method in the embodiment of the present application selects a target secondary cell group from the mobility configuration of the primary cell group currently accessed by the terminal device in response to a secondary cell group failure that occurs when performing primary cell group mobility and secondary cell group mobility. , where the triggering conditions of the target secondary cell group are met; based on the target secondary cell group configuration, the secondary cell group failure recovery is performed, so that the network device configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal device at the same time, and the mobility configuration of the MCG In the case where the mobility configuration of the SCG is included in the mobility configuration, if the secondary cell group fails when performing primary cell group mobility and secondary cell group mobility, the terminal device can be based on the mobility configuration of the cell group and the currently accessed cell group. The secondary cell group associated with the primary cell group is configured to perform failure recovery of the secondary cell group.

It should be noted that after step S901, step S902 may not be executed, but other steps may be executed. In other words, step S901 and step S902 are independent steps, and step S902 may not necessarily be executed after step S901, nor step S901 may be executed before step S902.

Please refer to Figure 10. Figure 10 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the terminal device in Figure 1.

Based on the mobility configuration of the cell group in the above example, as shown in Figure 10, the method may include but is not limited to the following steps:

Step S1001: Select a cell for failure recovery in response to a primary cell group failure occurring in performing primary cell group mobility and secondary cell group mobility.

Step S1002: When the cell used for failure recovery is a cell in the sixth candidate primary cell group, perform primary cell group failure recovery based on the configuration of the sixth candidate primary cell group.

The number of sixth candidate primary cell groups may be one or more.

In an implementation manner, the sixth candidate primary cell group configuration may be included in the mobility configuration of the primary cell group stored in the terminal device.

Step S1003: Store the trigger conditions and configurations of the candidate secondary cell groups in the sixth candidate primary cell group configuration.

Step S1004: When the triggering condition of the sixth candidate secondary cell group in the sixth candidate primary cell group configuration is met, access the sixth candidate secondary cell group based on the sixth candidate secondary cell group configuration.

The number of candidate secondary cell groups in the sixth candidate primary cell group configuration may be one or more. Each candidate secondary cell group corresponds to a trigger condition. The triggering conditions of some candidate secondary cell groups may be the same or different.

In an implementation manner, the sixth candidate secondary cell group configuration may be included in the mobility configuration of the primary cell group stored in the terminal device.

In this embodiment of the present application, when primary cell group failure recovery is performed based on the sixth candidate primary cell group configuration, the triggering conditions of each candidate secondary cell group in the sixth candidate primary cell group configuration may not be met. At this time, the trigger conditions and configurations of each candidate secondary cell group may be stored first; when the trigger condition of the sixth candidate secondary cell group is met, the sixth candidate secondary cell group is accessed based on the configuration of the sixth candidate secondary cell group.

In the above example, when performing MCG failure recovery and applying the candidate target cell configuration corresponding to the corresponding MCG mobility, the terminal device can directly store the SCG mobility configuration included in this configuration and evaluate the corresponding trigger event. When the event is triggered When satisfied, access the corresponding candidate target SCG.

The following examples illustrate this. It is assumed that the terminal equipment currently accesses the primary cell PCell0 in the primary cell group MCG0, and currently accesses the primary and secondary cells PSCell0 in the secondary cell group SCG0. Wherein, the terminal device receives the mobility configuration of the cell group sent by the network device. The mobility configuration of a cell group includes: the triggering condition of conditional handover CHO, and the configuration of the candidate primary cell group (including PCell1). Among them, the configuration of the candidate primary cell group (including PCell1) includes: the trigger condition 1 of the conditional primary and secondary cells to change the CPC + the configuration of the candidate secondary cell group (including PSCell1), the trigger condition 2 of the conditional primary and secondary cells to change the CPC + the candidate secondary cell Configuration of groups (including PSCell2), etc.

When the terminal device detects that the wireless link of MCG0 fails, the terminal device performs one or more of the following: initiates the reconstruction process and selects the primary cell for failure recovery in the cell selection; responds to the presence of the primary cell containing the primary cell. The candidate primary cell group performs failure recovery processing based on the configuration of the candidate primary cell group; in response to the configuration of the candidate primary cell group including the configuration of the secondary cell group, performs trigger condition evaluation and other processing on the configuration of the secondary cell group.

In cell selection, in one example, the primary cell selected for failure recovery can be PCell1, and the configuration of the candidate primary cell group (including PCell1) is applied for primary cell group failure recovery; the conditional primary and secondary cells can be stored to change the CPC. The trigger condition 1 + the configuration of the candidate secondary cell group (including PSCell1), and the storage condition trigger condition 2 + the configuration of the candidate secondary cell group (including PSCell2) for changing the CPC of the primary and secondary cells.

Then, in an example, if the terminal device successfully accesses PCell1, it evaluates the triggering condition of CPC. When it is found that the triggering condition 2 of CPC is met, CPC is executed, the configuration of the candidate secondary cell group (including PSCell2) is applied, and the access PSCell2. In another example, if the terminal device fails to successfully access PCell1, it is determined that the failure recovery fails.

In the failure recovery method of the embodiment of the present application, when primary cell group failure occurs when performing primary cell group mobility and secondary cell group mobility, the primary cell group configuration is based on the configuration of the sixth candidate primary cell group including the cell selected for failure recovery. Recover from cell group failure; and access the sixth candidate secondary cell group when the triggering conditions of the sixth candidate secondary cell group are met, so that the network equipment simultaneously configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal equipment, and When the mobility configuration of the MCG includes the mobility configuration of the SCG, if the primary cell group fails when performing primary cell group mobility and secondary cell group mobility, the terminal device can select the sixth candidate based on the mobility configuration of the cell group. The primary cell group configuration performs primary cell group failure recovery; and when the triggering conditions of the sixth candidate secondary cell group in the sixth candidate primary cell group configuration are met, the sixth candidate secondary cell group is accessed based on the sixth candidate secondary cell group configuration. .

It should be noted that after step S1001, step S1002 may not be executed, but other steps may be executed. In other words, step S1001 and step S1002 are independent steps, and step S1002 may not necessarily be executed after step S1001, nor step S1001 may be executed before step S1002. Similarly, after step S1003, step S1004 may not be executed. Step S1003 and step S1004 are independent steps.

Please refer to Figure 11. Figure 11 is a schematic flowchart of another failure recovery method provided by an embodiment of the present application. This method can be executed by the network device in Figure 1. As shown in Figure 11, the method may include but is not limited to the following steps:

Step S1101: Send the mobility configuration of the cell group to the terminal device; wherein the failure recovery process of the terminal device is based on the mobility configuration of the cell group; the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the candidate secondary cell group. mobility configuration.

In this embodiment of the present application, the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group, that is, the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group. At the same time, the network device configures the terminal device to perform MCG and SCG mobility at the same time. In some embodiments, the network device configuring the terminal device to simultaneously configure CHO+CPA/CPC may include at least one of the following situations:

In another example, the mobility configuration of a single cell group includes: trigger conditions, and/or cell group configuration; wherein the cell group configuration includes: candidate primary cell group configuration and candidate secondary cells associated with the candidate primary cell group. Cell group configuration. In one example, the triggering condition may include a triggering condition for a candidate primary cell group and a triggering condition for a candidate secondary cell group. In another example, there may be one triggering condition, which is shared by the candidate primary cell group and the candidate secondary cell group. That is to say, the triggering condition of the candidate primary cell group and the triggering condition of the candidate secondary cell group are the same.

In another example, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the triggering condition of the candidate primary cell group, and/or, Candidate primary cell group configuration; wherein, the candidate primary cell group configuration includes: the mobility configuration of the candidate secondary cell group associated with the candidate primary cell group; the candidate secondary cell group mobility configuration includes: the trigger conditions of the candidate secondary cell group, and/or, candidate secondary cell group configuration.

In the embodiment of this application, the network device can also configure a method for the terminal device to select a cell for failure recovery, and perform failure recovery based on the mobility configuration of the cell group; the method for selecting a cell for failure recovery includes the following methods: At least one of: performing cell selection during the reconstruction process to obtain a cell for failure recovery; selecting a cell for failure recovery from the mobility configuration of the cell group according to the network configuration; selecting the cell for failure recovery from the mobility configuration of the cell group according to the protocol. Selecting a cell for failure recovery; selecting a cell for failure recovery from the mobility configuration of the cell group according to the terminal equipment implementation; or other methods of selecting a cell for failure recovery, are not limited by this solution.

In the failure recovery method of the embodiment of the present application, the network device can send the mobility configuration of the cell group to the terminal device; wherein the failure recovery process of the terminal device is based on the mobility configuration of the cell group; the mobility configuration of the cell group includes the candidate primary cell group The mobility configuration and the mobility configuration of the candidate secondary cell group enable the terminal device to perform failure recovery processing when the mobility configuration of the MCG and the mobility configuration of the SCG exist at the same time, facilitating the mobility of the terminal device based on the cell group. configuration for failure recovery.

In the above embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspectives of network equipment and terminal equipment respectively. In order to implement each function in the method provided by the above embodiments of the present application, the network device and the first terminal device may include a hardware structure and a software module to implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. . A certain function among the above functions can be executed by a hardware structure, a software module, or a hardware structure plus a software module.

Please refer to FIG. 12 , which is a schematic structural diagram of a communication device 120 provided by an embodiment of the present application. The device is applied to terminal equipment, and the device includes: a processing unit 1201, configured to perform failure recovery based on the mobility configuration of the cell group in response to the occurrence of a failure; wherein the mobility configuration of the cell group includes the mobility of the candidate primary cell group Mobility configuration of configuration and candidate secondary cell groups.

In one implementation, the processing unit 1201 is further configured to perform one or more of the following: in response to a secondary cell group failure, select a cell for failure recovery; when the cell for failure recovery is the When a cell in a candidate secondary cell group is selected, secondary cell group failure recovery is performed based on the first candidate secondary cell group configuration in the mobility configuration of the first candidate secondary cell group.

In one implementation, the processing unit 1201 is further configured to, when the cell used for failure recovery is not a cell in any candidate secondary cell group, send a reconstruction request message to the network device, requesting that the The cell used for failure recovery reestablishes the RRC connection, or enters the idle state.

In one embodiment, the mobility configuration of a cell group includes: trigger conditions, and/or cell group configuration; wherein the cell group configuration includes: candidate primary cell group configuration and the candidate primary cell group association Candidate secondary cell group configuration.

In one embodiment, the mobility configuration of a cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the triggering condition of the candidate primary cell group, and/or , the candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: the mobility configuration of the candidate secondary cell group associated with the candidate primary cell group.

In one implementation, the processing unit 1201 is further configured to perform one or more of the following: in response to a primary cell group failure, select a cell for failure recovery; when the cell for failure recovery is the When there are two candidates for a cell in the primary cell group, release the secondary cell group currently accessed by the terminal device, and/or, based on the configuration of the second candidate primary cell group and the configuration of the second candidate secondary cell group, perform a primary cell group Failure recovery and secondary cell group connection; wherein the second candidate secondary cell group is a secondary cell group associated with the second candidate primary cell group.

In one implementation, the processing unit 1201 is further configured to perform one or more of the following: in response to a primary cell group failure, select a cell for failure recovery; when the cell for failure recovery is the When there are three cells in the primary cell group as candidates, primary cell group failure recovery is performed based on the configuration of the third candidate primary cell group.

In one implementation, the processing unit 1201 is further configured to, in response to a secondary cell group wireless link failure, send a reestablishment request message to the network device to reestablish the secondary cell group connection.

In one implementation, the processing unit 1201 is further configured to perform one or more of the following: in response to a secondary cell group failure that occurs when performing primary cell group mobility and secondary cell group mobility, select a cell group for failure recovery. Cell; when the cell used for failure recovery is a cell in the fourth candidate secondary cell group, based on the configuration of the fourth candidate secondary cell group, failure recovery of the secondary cell group is performed; wherein, the fourth candidate secondary cell group, It is the secondary cell group associated with the primary cell group currently accessed by the terminal device.

In one implementation, the processing unit 1201 is further configured to perform one or more of the following: in response to a primary cell group failure and a secondary cell group failure in performing primary cell group mobility and secondary cell group mobility, select The cell used for failure recovery; when the cell used for failure recovery is a cell in the fifth candidate primary cell group, based on the fifth candidate primary cell group configuration and the fifth candidate secondary cell group configuration, the primary cell Group failure recovery and secondary cell group failure recovery; wherein the fifth candidate secondary cell group is the secondary cell group associated with the fifth candidate primary cell group.

In one embodiment, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the trigger condition of the candidate primary cell group, and/ Or, candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: the mobility configuration of the candidate secondary cell group associated with the candidate primary cell group; the mobility configuration of the candidate secondary cell group includes: Trigger conditions for the candidate secondary cell group, and/or configuration of the candidate secondary cell group.

In one implementation, the processing unit 1201 is further configured to perform one or more of the following: in response to a secondary cell group failure that occurs when performing primary cell group mobility and secondary cell group mobility, from the current state of the terminal device The target secondary cell group is selected from the mobility configuration of the accessed primary cell group, where the triggering condition of the target secondary cell group is met; based on the target secondary cell group configuration, failure recovery of the secondary cell group is performed.

In one implementation, the processing unit 1201 is further configured to perform one or more of the following: in response to a primary cell group failure occurring when performing primary cell group mobility and secondary cell group mobility, select a cell group for failure recovery. Cell; when the cell used for failure recovery is a cell in the sixth candidate primary cell group, perform primary cell group failure recovery based on the sixth candidate primary cell group configuration; store the sixth candidate primary cell group configuration Triggering conditions and configurations of the candidate secondary cell group; when the triggering conditions of the sixth candidate secondary cell group in the sixth candidate primary cell group configuration are met, based on the sixth candidate secondary cell group configuration, access to the sixth candidate secondary cell group Candidate secondary cell group.

In one implementation, the mobility of the candidate primary cell group is the conditional handover CHO of the candidate primary cell group; the mobility of the candidate secondary cell group associated with the candidate primary cell group is the candidate secondary cell group. The conditional primary and secondary cells of the cell group change the CPC or the conditional primary and secondary cells add CPA.

In one embodiment, the failure includes: primary cell group failure, and/or secondary cell group failure; the primary cell group failure includes at least one of the following failures: primary cell group wireless link failure, primary cell group failure, Cell group conditional handover failure, primary cell group activation failure, primary cell group synchronization reconfiguration failure; the secondary cell group failure includes at least one of the following failures: secondary cell group wireless link failure, conditional primary and secondary cell change failure, Conditions: The addition of the primary and secondary cells failed, the activation of the secondary cell group failed, and the synchronization reconfiguration of the secondary cell group failed.

In one embodiment, in failure recovery based on the mobility configuration of a cell group, the method of selecting a cell for failure recovery includes at least one of the following methods: performing cell selection during the reconstruction process to obtain the cell for failure recovery. The restored cell; select the cell for failure recovery from the mobility configuration of the cell group according to the network configuration; select the cell for failure recovery from the mobility configuration of the cell group according to the protocol; implement the recovery from the cell group according to the terminal equipment Select the target cell for failure recovery in the mobility configuration.

Please refer to FIG. 13 , which is a schematic structural diagram of another communication device 130 provided by an embodiment of the present application. The device is applied to network equipment, and the device includes: a transceiver unit 1301, configured to send the mobility configuration of the cell group to the terminal device; wherein the failure recovery process of the terminal device is based on the mobility configuration of the cell group; The mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.

In one embodiment, the mobility configuration of a single cell group includes: trigger conditions, and/or cell group configuration; wherein the cell group configuration includes: candidate primary cell group configuration and the candidate primary cell group Associated candidate secondary cell group configuration.

In one embodiment, the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the trigger condition of the candidate primary cell group, and/ Or, candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group.

In one embodiment, the mobility configuration of a cell group includes: the mobility configuration of the candidate primary cell group; the mobility configuration of the candidate primary cell group includes: the triggering condition of the candidate primary cell group, and/or , candidate primary cell group configuration; wherein the candidate primary cell group configuration includes: the mobility configuration of the candidate secondary cell group associated with the candidate primary cell group; the mobility configuration of the candidate secondary cell group includes: candidate The triggering conditions of the secondary cell group, and/or the configuration of the candidate secondary cell group.

In one implementation, the transceiver unit 1301 is further configured to configure a method for selecting a cell for failure recovery for the terminal device, so as to perform failure recovery based on the mobility configuration of the cell group; the selection is used for failure recovery. The method of restoring the cell includes at least one of the following methods: performing cell selection during the reconstruction process to obtain the cell for failure recovery; selecting the cell for failure recovery from the mobility configuration of the cell group according to the network configuration; The cell for failure recovery is selected from the mobility configuration of the cell group according to the protocol; the cell for failure recovery is selected from the mobility configuration of the cell group according to the terminal equipment implementation.

Please refer to Figure 14, which is a schematic structural diagram of another communication device 140 provided by an embodiment of the present application. The communication device 140 may be a network device, a terminal device (such as the terminal device in the foregoing method embodiment), a chip, a chip system, a processor, etc. that supports the network device to implement the above method, or a terminal device that supports A chip, chip system, or processor that implements the above method. The device can be used to implement the method described in the above method embodiment. For details, please refer to the description in the above method embodiment.

Communication device 140 may include one or more processors 1401. The processor 1401 may be a general-purpose processor or a special-purpose processor, or the like. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data. The central processor can be used to control communication devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs. , processing data for computer programs.

Optionally, the communication device 140 may also include one or more memories 1402, on which a computer program 1404 may be stored. The processor 1401 executes the computer program 1404, so that the communication device 140 performs the steps described in the above method embodiments. method. Optionally, the memory 1402 may also store data. The communication device 140 and the memory 1402 can be provided separately or integrated together.

Optionally, the communication device 140 may also include a transceiver 1405 and an antenna 1406. The transceiver 1405 may be called a transceiver unit, a transceiver, a transceiver circuit, etc., and is used to implement transceiver functions. The transceiver 1405 may include a receiver and a transmitter. The receiver may be called a receiver or a receiving circuit, etc., used to implement the receiving function; the transmitter may be called a transmitter, a transmitting circuit, etc., used to implement the transmitting function.

Optionally, the communication device 140 may also include one or more interface circuits 1407. The interface circuit 1407 is used to receive code instructions and transmit them to the processor 1401 . The processor 1401 executes the code instructions to cause the communication device 140 to perform the method described in the above method embodiment.

The communication device 140 is a terminal device (such as the terminal device in the aforementioned method embodiment): the processor 1401 is used to execute step S201 in Figure 2; execute steps S301 and S302 in Figure 3; and step S401 and S402 in Figure 4; Steps S501 and S502 in Figure 5; Step S601 in Figure 6; Steps S701 and S702 in Figure 7; Steps S801 and S802 in Figure 8; Steps S901 and S902 in Figure 9; Steps S1001 and S1001 in Figure 10 S1002, S1003, S1004.

The communication device 140 is a network device: the transceiver 1405 is used to perform step S1101 in FIG. 11 .

In one implementation, the processor 1401 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits used to implement the receiving and transmitting functions can be separate or integrated together. The above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing codes/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.

In one implementation, the processor 1401 may store a computer program 1404, and the computer program 1404 runs on the processor 1401, causing the communication device 140 to perform the method described in the above method embodiment. The computer program 1404 may be solidified in the processor 1401, in which case the processor 1401 may be implemented by hardware.

In one implementation, the communication device 140 may include a circuit, which may implement the functions of sending or receiving or communicating in the foregoing method embodiments. The processor and transceiver described in this application can be implemented in integrated circuits (ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board (PCB), electronic equipment, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiments may be a network device or a terminal device (such as the first terminal device in the foregoing method embodiment), but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may be Not limited by Figure 8. The communication device may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) An independent integrated circuit IC, or chip, or chip system or subsystem; (2) A collection of one or more ICs. Optionally, the IC collection may also include a collection of devices for storing data and computer programs. Storage components; (3) ASIC, such as modems; (4) Modules that can be embedded in other devices; (5) Receivers, terminal equipment, intelligent terminal equipment, cellular phones, wireless equipment, handheld machines, mobile units , vehicle equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.; (6) Others, etc.

For the case where the communication device may be a chip or a chip system, refer to the schematic structural diagram of the chip shown in FIG. 15 . The chip shown in Figure 15 includes a processor 1501 and an interface 1502. The number of processors 1501 may be one or more, and the number of interfaces 1502 may be multiple.

Optionally, the chip also includes a memory 1503, which is used to store necessary computer programs and data.

Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented in hardware or software depends on the specific application and overall system design requirements. Those skilled in the art can use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the protection scope of the embodiments of the present application.

Embodiments of the present application also provide a communication system, which system includes a communication device as a terminal device (such as a terminal device in the foregoing method embodiment) in the aforementioned embodiment of FIG. 12 and a communication device as a network device in the aforementioned embodiment of FIG. 13 .

This application also provides a readable storage medium on which instructions are stored. When the instructions are executed by a computer, the functions of any of the above method embodiments are implemented.

This application also provides a computer program product, which, when executed by a computer, implements the functions of any of the above method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program may be stored in or transferred from one computer-readable storage medium to another, for example, the computer program may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVD)), or semiconductor media (e.g., solid state disks, SSD)) etc.

Persons of ordinary skill in the art can understand that the first, second, and other numerical numbers involved in this application are only for convenience of description and are not used to limit the scope of the embodiments of this application and also indicate the order.

At least one in this application can also be described as one or more, and the plurality can be two, three, four or more, which is not limited by this application. In the embodiment of this application, for a technical feature, the technical feature is distinguished by "first", "second", "third", "A", "B", "C" and "D", etc. The technical features described in "first", "second", "third", "A", "B", "C" and "D" are in no particular order or order.

The corresponding relationships shown in each table in this application can be configured or predefined. The values of the information in each table are only examples and can be configured as other values, which are not limited by this application. When configuring the correspondence between information and each parameter, it is not necessarily required to configure all the correspondences shown in each table. For example, in the table in this application, the corresponding relationships shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also be other names understandable by the communication device, and the values or expressions of the parameters may also be other values or expressions understandable by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables. wait.

Predefinition in this application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, solidification, or pre-burning.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A failure recovery method, characterized in that it is applied to terminal equipment, and the method includes:

In response to the occurrence of the failure, failure recovery is performed based on the mobility configuration of the cell group;

Wherein, the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.
The method according to claim 1, characterized in that the mobility configuration of the candidate primary cell group exists in the mobility configuration of a cell group;

The mobility configuration of the candidate secondary cell group exists in the mobility configuration of another cell group.
The method according to claim 2, characterized in that, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group, including one or more of the following:

In response to a secondary cell group failure occurring, selecting a cell for failure recovery;

When the cell used for failure recovery is a cell in the first candidate secondary cell group, secondary cell group failure recovery is performed based on the first candidate secondary cell group configuration in the mobility configuration of the first candidate secondary cell group.
The method of claim 3, further comprising:

When the cell used for failure recovery is not a cell in any candidate secondary cell group, a reestablishment request message is sent to the network device to request reestablishment of the RRC connection with the cell used for failure recovery, or to enter an idle state.
The method according to claim 1, characterized in that the mobility configuration of a single cell group includes: trigger conditions, and/or cell group configuration;

Wherein, the cell group configuration includes: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group.
The method according to claim 1, characterized in that the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group;

The mobility configuration of the candidate primary cell group includes: trigger conditions of the candidate primary cell group, and/or candidate primary cell group configuration;

Wherein, the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group.
The method according to claim 5 or 6, characterized in that, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group, including one or more of the following:

In response to a primary cell group failure occurring, selecting a cell for failure recovery;

When the cell used for failure recovery is a cell in the second candidate primary cell group, release the secondary cell group currently accessed by the terminal device, and/or, based on the second candidate primary cell group configuration and the second candidate Secondary cell group configuration, primary cell group failure recovery and secondary cell group connection;

Wherein, the second candidate secondary cell group is a secondary cell group associated with the second candidate primary cell group.
The method according to claim 5 or 6, characterized in that, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group, including one or more of the following:

In response to a primary cell group failure occurring, selecting a cell for failure recovery;

When the cell used for failure recovery is a cell in the third candidate primary cell group, primary cell group failure recovery is performed based on the configuration of the third candidate primary cell group.
The method according to claim 5 or 6, characterized in that, in response to a failure, performing failure recovery based on the mobility configuration of the cell group includes:

In response to the secondary cell group wireless link failure occurring, a reestablishment request message is sent to the network device to reestablish the secondary cell group connection.
The method according to claim 5 or 6, characterized in that, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group, including one or more of the following:

selecting a cell for failure recovery in response to a secondary cell group failure occurring in performing primary cell group mobility and secondary cell group mobility;

When the cell used for failure recovery is a cell in the fourth candidate secondary cell group, perform secondary cell group failure recovery based on the configuration of the fourth candidate secondary cell group;

Wherein, the fourth candidate secondary cell group is a secondary cell group associated with the primary cell group currently accessed by the terminal equipment.
The method according to claim 5 or 6, characterized in that, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group, including one or more of the following:

selecting a cell for failure recovery in response to a primary cell group failure and a secondary cell group failure occurring while performing primary cell group mobility and secondary cell group mobility;

When the cell used for failure recovery is a cell in the fifth candidate primary cell group, primary cell group failure recovery and secondary cell group failure recovery are performed based on the fifth candidate primary cell group configuration and the fifth candidate secondary cell group configuration. ;

The fifth candidate secondary cell group is a secondary cell group associated with the fifth candidate primary cell group.
The method according to claim 1, characterized in that the mobility configuration of a cell group includes: the mobility configuration of the candidate primary cell group;

The mobility configuration of the candidate primary cell group includes: trigger conditions of the candidate primary cell group, and/or candidate primary cell group configuration;

Wherein, the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group;

The mobility configuration of the candidate secondary cell group includes: trigger conditions of the candidate secondary cell group, and/or candidate secondary cell group configuration.
The method of claim 12, characterized in that, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group, including one or more of the following:

In response to a secondary cell group failure in performing primary cell group mobility and secondary cell group mobility, a target secondary cell group is selected from the mobility configuration of the primary cell group currently accessed by the terminal device, wherein the target secondary cell group The triggering conditions of the cell group are met;

Based on the target secondary cell group configuration, secondary cell group failure recovery is performed.
The method according to claim 12, characterized in that, in response to a failure, failure recovery is performed based on the mobility configuration of the cell group, including one or more of the following:

selecting a cell for failure recovery in response to a primary cell group failure occurring in performing primary cell group mobility and secondary cell group mobility;

When the cell used for failure recovery is a cell in the sixth candidate primary cell group, primary cell group failure recovery is performed based on the configuration of the sixth candidate primary cell group;

Store the trigger conditions and configurations of the candidate secondary cell groups in the sixth candidate primary cell group configuration;

When the triggering condition of the sixth candidate secondary cell group in the sixth candidate primary cell group configuration is met, the sixth candidate secondary cell group is accessed based on the sixth candidate secondary cell group configuration.
The method according to claim 1, characterized in that:

The mobility of the candidate primary cell group is the conditional switching CHO of the candidate primary cell group;

The mobility of the candidate secondary cell group associated with the candidate primary cell group changes the CPC of the conditional primary and secondary cells of the candidate secondary cell group or adds the CPA for the conditional primary and secondary cells.
The method according to claim 1, characterized in that:

The mobility of the candidate primary cell group is the selective activation of the cell group of the candidate primary cell group;

The mobility of the candidate secondary cell group associated with the candidate primary cell group is the selective activation of the cell group of the candidate secondary cell group.
The method according to claim 1, characterized in that the failure includes: failure of the primary cell group and/or failure of the secondary cell group;

The primary cell group failure includes at least one of the following failures: primary cell group wireless link failure, primary cell group conditional handover failure, primary cell group activation failure, primary cell group synchronization reconfiguration failure;

The secondary cell group failure includes at least one of the following failures: secondary cell group wireless link failure, conditional primary and secondary cell change failure, conditional primary and secondary cell addition failure, secondary cell group activation failure, and secondary cell group synchronization reconfiguration failure. .
The method according to claim 1, characterized in that, in failure recovery based on the mobility configuration of the cell group, the method of selecting cells for failure recovery includes at least one of the following methods:

Perform cell selection during the reconstruction process to obtain the cell used for failure recovery;

Select cells for failure recovery from the mobility configuration of the cell group according to the network configuration;

Select cells for failure recovery from the mobility configuration of the cell group according to the protocol;

The target cell for failure recovery is selected from the mobility configuration of the cell group according to the terminal device implementation.
A failure recovery method, characterized in that it is applied to network equipment, and the method includes:

sending the mobility configuration of the cell group to the terminal device, wherein the failure recovery process of the terminal device is based on the mobility configuration of the cell group;

Wherein, the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.
The method according to claim 19, characterized in that the mobility configuration of the candidate primary cell group exists in the mobility configuration of one cell group;

The mobility configuration of the candidate secondary cell group exists in the mobility configuration of another cell group.
The method according to claim 19, characterized in that the mobility configuration of a single cell group includes: trigger conditions, and/or cell group configuration;

Wherein, the cell group configuration includes: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group.
The method according to claim 19, characterized in that the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group;

The mobility configuration of the candidate primary cell group includes: trigger conditions of the candidate primary cell group, and/or candidate primary cell group configuration;

Wherein, the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group.
The method according to claim 19, characterized in that the mobility configuration of a single cell group includes: the mobility configuration of the candidate primary cell group;

The mobility configuration of the candidate primary cell group includes: trigger conditions of the candidate primary cell group, and/or candidate primary cell group configuration;

Wherein, the candidate primary cell group configuration includes: mobility configuration of a candidate secondary cell group associated with the candidate primary cell group;

The mobility configuration of the candidate secondary cell group includes: trigger conditions of the candidate secondary cell group, and/or candidate secondary cell group configuration.
The method according to claim 19, characterized in that the mobility of the candidate primary cell group is the conditional switching CHO of the candidate primary cell group;

The mobility of the candidate secondary cell group associated with the candidate primary cell group changes the CPC of the conditional primary and secondary cells of the candidate secondary cell group or adds the CPA for the conditional primary and secondary cells.
The method according to claim 19, characterized in that the mobility of the candidate primary cell group is the selective activation of the cell group of the candidate primary cell group;

The mobility of the candidate secondary cell group associated with the candidate primary cell group is the selective activation of the cell group of the candidate secondary cell group.
The method of claim 19, further comprising:

Configuring a method for selecting cells for failure recovery for the terminal equipment, and performing failure recovery with mobility configuration based on cell groups;

The method of selecting a cell for failure recovery includes at least one of the following methods:

Perform cell selection during the reconstruction process to obtain the cell used for failure recovery;

Select cells for failure recovery from the mobility configuration of the cell group according to the network configuration;

Select cells for failure recovery from the mobility configuration of the cell group according to the protocol;

The cell for failure recovery is selected from the mobility configuration of the cell group according to the terminal device implementation.
A failure recovery device, characterized in that it is applied to terminal equipment, and the device includes:

a processing unit configured to perform failure recovery based on the mobility configuration of the cell group in response to the occurrence of the failure;

Wherein, the mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.
A failure recovery device, characterized in that it is applied to network equipment, and the device includes:

A transceiver unit configured to send the mobility configuration of the cell group to the terminal device, wherein the failure recovery process of the terminal device is based on the mobility configuration of the cell group;

The mobility configuration of the cell group includes the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.
A communication device, characterized in that the device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device executes the claims The method described in any one of 1 to 18.
A communication device, characterized in that the device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device executes the claims The method described in any one of 19 to 26.
A communication device, characterized by including: a processor and an interface circuit;

The interface circuit is used to receive code instructions and transmit them to the processor;

The processor is configured to run the code instructions to perform the method according to any one of claims 1 to 18.
A communication device, characterized by including: a processor and an interface circuit;

The interface circuit is used to receive code instructions and transmit them to the processor;

The processor is configured to run the code instructions to perform the method according to any one of claims 19 to 26.
A computer-readable storage medium for storing instructions, which when executed, enables the method according to any one of claims 1 to 18 to be implemented.
A computer-readable storage medium configured to store instructions that, when executed, enable the method according to any one of claims 19 to 26 to be implemented.