CN117546524A - Failure recovery method and device - Google Patents
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- CN117546524A CN117546524A CN202280001872.2A CN202280001872A CN117546524A CN 117546524 A CN117546524 A CN 117546524A CN 202280001872 A CN202280001872 A CN 202280001872A CN 117546524 A CN117546524 A CN 117546524A
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Abstract
The embodiment of the application discloses a failure recovery method and a device thereof, which can be applied to the technical field of communication, wherein the method comprises the following steps: the terminal equipment responds to failure and carries out failure recovery based on mobility configuration of the cell group; the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group MCG and the mobility configuration of the candidate secondary cell group SCG, so that the terminal equipment can perform failure recovery processing under the condition that the network equipment configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal equipment at the same time, and the terminal equipment is convenient to perform failure recovery based on the mobility configuration of the cell group.
Description
The present disclosure relates to the field of communications technologies, and in particular, to a failure recovery method and apparatus thereof.
In MR-DC (Multi-Radio Dual Connectivity, multi-radio dual connectivity technology), a terminal device may utilize radio resources provided by two different schedules located on two different NG-RAN (5G radio access network) nodes, one providing NR access and the other providing E-UTRA or NR access over a non-ideal backhaul connection. One as MN (Master Node) and one as SN (Secondary Node). The MN and SN are connected by a network interface in which at least the MN is connected to a core network.
Currently, the network device configures mobility configuration of an MCG (Master Cell group, primary cell group) or mobility configuration of an SCG (Secondary Cell group ) for the terminal device, and when MCG failure occurs, MCG failure recovery can be performed by using the mobility configuration of the MCG; alternatively, when SCG failure occurs, SCG failure recovery is performed using the mobility configuration of SCG. However, in the case where 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, no study of failure recovery is performed.
Disclosure of Invention
The embodiment of the application provides a failure recovery method and a device thereof, which can be applied to the technical field of communication, so as to respond to failure when the mobility configuration of a cell group comprises the mobility configuration of a candidate primary cell group and the mobility configuration of a candidate secondary cell group, and perform failure recovery based on the mobility configuration of the cell group, thereby realizing failure recovery processing when network equipment simultaneously configures the mobility configuration of an MCG and the mobility configuration of an SCG for terminal equipment.
In a first aspect, an embodiment of the present application provides a failure recovery method, where the method is performed by a terminal device, and the method includes: in response to failure, performing failure recovery based on mobility configuration of the cell group; the mobility configuration of the cell group comprises 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.
In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the failure, includes one or more of: in response to the occurrence of a secondary cell group failure, selecting a cell for failure recovery; and when the cell for failure recovery is a cell in the first candidate auxiliary cell group, performing auxiliary cell group failure recovery based on first candidate auxiliary cell group configuration in mobility configuration of the first candidate auxiliary cell group.
In one implementation, the method further comprises: and when the cell for failure recovery is not a cell in any one candidate auxiliary cell group, sending a reestablishment request message to the network equipment, requesting to reestablish RRC connection with the cell for failure recovery, or entering an idle state.
In one implementation, the mobility configuration for a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group.
In one implementation, the mobility configuration for a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: and the mobility configuration of the candidate auxiliary cell group associated with the candidate main cell group.
In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the failure, includes one or more of: selecting a cell for failure recovery in response to occurrence of a primary cell group failure; when the cell for failure recovery is a cell in a second candidate primary cell group, releasing a secondary cell group which is currently accessed by the terminal equipment, and/or carrying out primary cell group failure recovery and secondary cell group connection based on the second candidate primary cell group configuration and the second candidate secondary cell group configuration; and the second candidate auxiliary cell group is an auxiliary cell group associated with the second candidate main cell group.
In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the failure, includes one or more of: selecting a cell for failure recovery in response to occurrence of a primary cell group failure; and when the cell for failure recovery is a cell in the third candidate master cell group, performing master cell group failure recovery based on the configuration of the third candidate master cell group.
In one implementation, the responding to the failure, performing failure recovery based on mobility configuration of the cell group, includes: and in response to the occurrence of the radio link failure of the secondary cell group, sending a reestablishment request message to the network equipment so as to reestablish the secondary cell group connection.
In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the failure, includes one or more of: selecting a cell for failure recovery in response to a secondary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility; when the cell for failure recovery is a cell in a fourth candidate auxiliary cell group, performing auxiliary cell group failure recovery based on fourth candidate auxiliary cell group configuration; and the fourth candidate auxiliary cell group is an auxiliary cell group associated with the main cell group which is accessed by the terminal equipment currently.
In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the failure, includes one or more of: selecting 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; when the cell for failure recovery is a cell in the fifth candidate primary cell group, performing primary cell group failure recovery and secondary cell group failure recovery based on the fifth candidate primary cell group configuration and the fifth candidate secondary cell group configuration; and the fifth candidate secondary cell group is a secondary cell group associated with the fifth candidate primary cell group.
In one implementation, the mobility configuration of a cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: mobility configuration of candidate secondary cell groups associated with the candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate 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 failure, includes one or more of: in response to secondary cell group failure occurring when performing primary cell group mobility and secondary cell group mobility, selecting a target secondary cell group from a mobility configuration of a primary cell group currently accessed by the terminal device, wherein a trigger condition of the target secondary cell group is satisfied; and carrying out failure recovery of the secondary cell group based on the configuration of the target secondary cell group.
In one implementation, the failure recovery based on the mobility configuration of the cell group in response to the failure, includes one or more of: selecting a cell for failure recovery in response to a primary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility; when the cell for failure recovery is a cell in a sixth candidate master cell group, performing master cell group failure recovery based on a sixth candidate master cell group configuration; storing the triggering condition and configuration of the candidate auxiliary cell group in the sixth candidate main cell group configuration; and accessing the sixth candidate auxiliary cell group based on the sixth candidate auxiliary cell group configuration when the triggering condition of the sixth candidate auxiliary cell group in the sixth candidate main cell group configuration is met.
In one implementation, mobility of the candidate primary cell set is conditional handover CHO for the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group changes CPC for the conditional main and auxiliary cells of the candidate auxiliary cell group or adds CPA for the conditional main and auxiliary cells.
In one implementation, mobility of the candidate primary cell set is selectively activated for a cell set of the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group is selectively activated for the cell group of the candidate auxiliary cell group.
In one implementation, the failure includes: a primary cell group failure and/or a secondary cell group failure; the primary cell group failure includes at least one of the following failures: a radio link failure of a main cell group, a conditional handover failure of the main cell group, an activation failure of the main cell group and a synchronous reconfiguration failure of the main cell group; the secondary cell group failure includes at least one of the following failures: the radio link of the auxiliary cell group fails, the change of the conditional primary and secondary cells fails, the addition of the conditional primary and secondary cells fails, the activation of the auxiliary cell group fails, and the synchronous reconfiguration of the auxiliary cell group fails.
In one implementation, in failure recovery based on a mobility configuration of a group of cells, the manner in which a cell for failure recovery is selected includes at least one of: performing cell selection in the reconstruction process to obtain the cell for failure recovery; selecting a cell for failure recovery from the mobility configuration of the cell group according to the network configuration; selecting a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to the mobility configuration of the cell group implemented by the terminal device.
In the technical scheme, in response to failure, failure recovery is performed based on mobility configuration of a cell group; the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group, so that the terminal equipment can perform failure recovery processing under the condition that the network equipment configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal equipment at the same time, and the terminal equipment is convenient to perform failure recovery based on the mobility configuration of the cell group.
In a second aspect, embodiments of the present application provide another failure recovery method, which is performed by a network device, the method including: transmitting mobility configuration of the cell group to the terminal equipment; wherein the failure recovery procedure of the terminal device is based on the mobility configuration of the cell group; wherein the mobility configuration of the cell group comprises 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.
In one implementation, the mobility configuration for a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group.
In one implementation, the mobility configuration for a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: and the mobility configuration of the candidate auxiliary cell group associated with the candidate main cell group.
In one implementation, the mobility configuration of a cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: mobility configuration of candidate secondary cell groups associated with the candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
In one implementation, mobility of the candidate primary cell set is conditional handover CHO for the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group changes CPC for the conditional main and auxiliary cells of the candidate auxiliary cell group or adds CPA for the conditional main and auxiliary cells.
In one implementation, mobility of the candidate primary cell set is selectively activated for a cell set of the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group is selectively activated for the cell group of the candidate auxiliary cell group.
In one implementation, the method further comprises: configuring a mode of selecting a cell for failure recovery for the terminal equipment so as to perform failure recovery based on mobility configuration of a cell group; the manner of selecting a cell for failure recovery includes at least one of: performing cell selection in the reconstruction process to obtain the cell for failure recovery; selecting a cell for failure recovery from the mobility configuration of the cell group according to the network configuration; selecting a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; the cell for failure recovery is selected from the mobility configuration of the cell group according to the terminal device implementation.
In the technical scheme, a mobility configuration of a cell group is sent to terminal equipment; wherein the failure recovery procedure of the terminal device is based on the mobility configuration of the cell group; the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group, so that the mobility configuration of the MCG and the mobility configuration of the SCG are configured for the terminal equipment at the same time, the terminal equipment can perform failure recovery processing under the condition that the mobility configuration of the MCG and the mobility configuration of the SCG are configured at the same time, and the terminal equipment can perform failure recovery based on the mobility configuration of the cell group conveniently.
In a third aspect, an embodiment of the present application provides a communications device, where the communications device has a function of implementing part or all of the functions of the terminal device in the method described in the first aspect, for example, a function of the communications device may be provided in some or all of the embodiments of the present application, or a function of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the functions described above.
In one implementation, the communication device may include a transceiver module and a processing module in a structure configured to support the communication device to perform the corresponding functions in the method. The transceiver module is used for supporting communication between the communication device and other equipment. The communication device may further comprise a memory module for coupling with the transceiver module and the processing module, which holds the necessary computer programs and data of 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 a fourth aspect, embodiments of the present application provide another communications apparatus having some or all of the functions of implementing the network device in the method example described in the second aspect, for example, the functions of the communications apparatus may be provided with some or all of the functions of the embodiments of the present application, or may be provided with functions that implement any of the embodiments of the present application separately. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the functions described above.
In one implementation, the communication device may include a transceiver module and a processing module in a structure configured to support the communication device to perform the corresponding functions of the method. The transceiver module is used for supporting communication between the communication device and other equipment. The communication device may further comprise a memory module for coupling with the transceiver module and the processing module, which holds the necessary computer programs and data of the communication device.
In a fifth aspect, embodiments of the present application provide a communication device, which includes a processor, when the processor invokes a computer program in a memory, to perform the method of the first aspect.
In a sixth aspect, embodiments of the present application provide a communications device including a processor, when the processor invokes a computer program in memory, to perform the method of the second aspect.
In a seventh aspect, embodiments of the present application provide a communication apparatus comprising a processor and a memory, the memory having a computer program stored therein; the processor executes the computer program stored in the memory to cause the communication device to perform the method of the first aspect described above.
In an eighth aspect, embodiments of the present application provide a communication apparatus comprising a processor and a memory, the memory having a computer program stored therein; the processor executes the computer program stored in the memory to cause the communication device to perform the method of the second aspect described above.
In a ninth aspect, embodiments of the present application provide a communications device, the device comprising a processor and interface circuitry for receiving code instructions and transmitting to the processor, the processor being configured to execute the code instructions to cause the device to perform the method of the first aspect described above.
In a tenth aspect, embodiments of the present application provide a communications device comprising a processor and interface circuitry for receiving code instructions and transmitting to the processor, the processor being configured to execute the code instructions to cause the device to perform the method of the second aspect described above.
In an eleventh aspect, an embodiment of the present application provides a communication system, where the system includes a communication device according to the third aspect and a communication device according to the fourth aspect, or where the system includes a communication device according to the fifth aspect and a communication device according to the sixth aspect, or where the system includes a communication device according to the seventh aspect and a communication device according to the eighth aspect, or where the system includes a communication device according to the ninth aspect and a communication device according to the tenth aspect.
In a twelfth aspect, an embodiment of the present invention provides a computer readable storage medium storing instructions for use by the terminal device, where the instructions, when executed, cause the terminal device to perform the method of the first aspect.
In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium, configured to store instructions for use by a network device as described above, where the instructions, when executed, cause the network device to perform the method as described in the second aspect.
In a fourteenth aspect, the present application also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.
In a fifteenth aspect, the present application also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.
In a sixteenth aspect, the present application provides a chip system comprising at least one processor and an interface for supporting a terminal device to implement the functionality referred to in the first aspect, e.g. to determine or process at least one of data and information referred to in the above-mentioned method. In one possible design, the chip system further includes a memory for holding computer programs and data necessary for the terminal device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.
In a seventeenth aspect, the present application provides a chip system comprising at least one processor and an interface for supporting a network device to implement the functionality referred to in the second aspect, e.g. to determine or process at least one of data and information referred to in the above-described method. In one possible design, the chip system further includes a memory to hold computer programs and data necessary for the network device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.
In an eighteenth aspect, the present application provides a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.
In a nineteenth aspect, the present application provides a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.
In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.
Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application;
Fig. 2 is a flow chart of a failure recovery method according to an embodiment of the present application;
FIG. 3 is a flow chart of another failure recovery method according to an embodiment of the present application;
FIG. 4 is a flowchart of another failure recovery method according to an embodiment of the present application;
FIG. 5 is a flowchart of another failure recovery method according to an embodiment of the present application;
FIG. 6 is a flowchart of another failure recovery method according to an embodiment of the present application;
FIG. 7 is a flowchart of another failure recovery method according to an embodiment of the present application;
FIG. 8 is a flowchart of another failure recovery method according to an embodiment of the present application;
FIG. 9 is a flowchart of another failure recovery method according to an embodiment of the present application;
FIG. 10 is a flowchart of another failure recovery method according to an embodiment of the present application;
FIG. 11 is a flowchart of another failure recovery method according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 13 is a schematic structural diagram of another communication device according to an embodiment of the present application;
fig. 14 is a schematic structural diagram of another communication device according to an embodiment of the present application;
Fig. 15 is a schematic structural diagram of a chip according to an embodiment of the present application.
For ease of understanding, the terms referred to in this application are first introduced.
1、MR-DC
In MR-DC (Multi-Radio Dual Connectivity ), the terminal device can utilize radio resources provided by two different schedules located on two different NG-RAN (5G radio access network) nodes, one providing NR access and the other providing E-UTRA or NR access over a non-ideal backhaul connection. One as MN (Master Node) and one as SN (Secondary Node). The MN and SN are connected by a network interface in which at least the MN is connected to a core network.
2、MR-DC with EPC
E-UTRAN (Evolved UMTS Terrestrial Radio Access Network ) supports MR-DC through E-UTRA-NR DC (EN-DC), where terminal devices are connected to one eNB serving as MN and one EN-gNB serving as SN. The eNB is connected to EPC (4G core network) through an S1 interface, and to en-gNB through an X2 interface. The en-gNB may also be connected to the EPC through the S1-U interface, and may also be connected to other en-gNBs through the X2-U interface.
3、E-UTRA-NR Dual Connectivity NGEN-DC
The NG-RAN supports NG-RAN E-UTRA-NR dual connectivity (NGEN-DC), where the terminal device is connected to one NG-eNB as MN and one gNB as SN. The ng-eNB is connected to a 5GC (5G core network) and the gNB is connected to the ng-eNB through an Xn interface.
4、NR-E-UTRA Dual Connectivity NE-DC
The NG-RAN supports NR-E-UTRA DC (NE-DC), where the terminal equipment is connected to one gNB acting as MN and one NG-eNB acting as SN. The gNB is connected to 5GC and the ng-eNB is connected to the gNB through an Xn interface.
5、NR-NR Dual Connectivity
The 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 main gNB is connected to the 5GC through an NG interface, the two gNBs are connected through an Xn interface, and the auxiliary gNB can also be connected to the 5GC through an NG-U interface. In addition, NR-DC can also be used for terminal equipment to access a single gNB, simultaneously acting as MN and SN, and simultaneously configuring MCG and SCG.
Under the dual connection, the terminal device can access two cell groups, namely a main cell group MCG and a secondary cell group SCG. Under MCG, there may be a plurality of cells, one of which is used to initiate initial access, and this Cell is called PCell (Primary Cell). As the name suggests, PCell is the most "primary" cell within MCG. The PCell under MCG and SCell (Secondary Cell) under MCG are joined together by carrier aggregation CA. The main cell in the MCG is PCell, and the auxiliary cell is SCell; the primary and secondary cells in the SCG are PSCell (Primary Secondary Cell, primary and secondary cells), and the secondary cells are scells. Since much signaling is sent only on PCell and PSCell, for descriptive convenience, a concept sPCell (special Cell) PCell and PSCell, collectively referred to as sPCell, is also defined in the protocol.
6. Conditional trigger based mobility management
In the mobility management based on the condition triggering, the terminal equipment realizes the mobility management based on the condition configured by the network equipment and the associated candidate cell, and triggers the mobility management after meeting the condition, and accesses the associated candidate cell. Wherein the network device configured conditions may be specific measurement-based events or location-based, time-based events. The associated candidate cells may be candidate primary cells, primary and secondary cells, corresponding to respective condition-triggered based mobility management CHO (Conditional Handover ) and CPC (Conditional PSCell Change, conditional primary and secondary cell change)/CPA (Conditional PSCell Addition, conditional primary and secondary cell addition), respectively. Currently, support for MN-initiated CHO, MN-initiated CPA/CPC, SN-initiated CPC in R17.
7. Selective activation of cell groups
In the corresponding mobility enhancement subject, selective activation (selective activation of Cell groups) of the MR-DC Cell group is proposed, which, unlike CHO, CPA/CPC, can enable subsequent configuration to be performed after a CG (Cell group) change, without requiring the network device to reconfigure or reinitialize the corresponding Cell group selectively activated configuration. This may reduce signaling overhead and interrupt duration for CG changes.
I.e. in cell group selective activation, after activating the new cell group configuration, the terminal device will not delete the corresponding cell group selective activation configuration.
In cell group selective activation, the terminal device may activate or deactivate a pre-configured candidate cell group or cell according to a configuration (e.g., activation message) issued by the network device or a corresponding activation event without having to re-provide the configuration of the cell group. Or, in the selective activation of a cell group, a new cell or a cell group is activated, or after the new cell configuration or the cell group configuration is applied or after the new cell or the cell group is accessed, the terminal device will not delete the configuration information of the selective activation of the corresponding cell group.
The selective activation of a cell group (selective activation of cell groups), which may also be referred to as cell group activation. It may enable the cell group or cell change, the corresponding configuration information can still be performed without the need for network reconfiguration or reinitialization of the configuration information for the corresponding cell group activation. This may reduce signaling overhead and interrupt duration for cell group changes. The configuration information for cell group activation may include: configuration ID and configuration of target cell or configuration of target cell group. Optionally, the configuration information of cell group activation may also include trigger conditions (which may also be referred to as execution conditions, activation conditions). Wherein, the network in the embodiment of the application may refer to a network device.
In an embodiment, the cell group activation is a mobility management procedure, including any mobility management procedure in which a terminal device activates or deactivates a corresponding cell or cell group according to signaling sent by a network or criteria specified by a protocol, or in an autonomous mode or the like by configuring cell group activation configuration, or after applying the corresponding cell configuration or cell group configuration, or accessing a cell or cell group.
In an embodiment, cell group activation is a mobility management procedure, including any mobility management procedure that does not delete or release a corresponding part or all of the configuration information after performing the mobility procedure. Wherein not deleting or releasing the corresponding partial or complete configuration information may also be referred to as retaining the corresponding partial or complete configuration information.
Wherein the mobility procedure includes, but is not limited to, one or more of the following: cell group selective activation, conditional trigger based mobility management.
The mobility procedure is illustratively cell group selective activation, and when the terminal device performs failure recovery based on the configuration information for mobility, the terminal device performs cell group selective activation, and/or applies a target cell group configuration corresponding to the cell for failure recovery.
Wherein the target cell group configuration may be configuration information stored for the terminal device. For example information in terminal device variables stored for selective activation configuration information of a group of cells.
For example, the terminal device may store the selective activation configuration information for the cell group corresponding to different candidate cell groups, where the selective activation configuration information for the cell group corresponding to each candidate cell group includes the configuration of the candidate cell group (which may be represented by an 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 this candidate cell group (i.e., the target cell group). If the RRC reconfiguration message indicates that the target cell group is to be accessed, the RRC reconfiguration is applied, corresponding terminal equipment behavior is performed, and access to the target cell group is attempted.
The mobility procedure is, for example, a mobility management based on a conditional trigger, including one or more of CHO, CPA, CPC, and when the terminal device performs failure recovery based on configuration information for mobility, CHO and/or CPC/CPA is executed and/or a target cell group configuration corresponding to a cell used for failure recovery is applied.
Wherein the target cell group configuration may be a configuration stored by the terminal device. For example, configuration information in stored CHO/CPC/CPA configured terminal device variables. For example, the terminal device variable may be varconditional reconfig, which may include CHO/CPC/CPA configurations of a plurality of candidate cell groups (or cells), including configurations of respective candidate cell groups, and when the candidate cell group is a target cell group corresponding to a cell for failure recovery, determining the candidate cell group configuration as the target cell group configuration.
For example, the terminal device may store mobility management configuration information for the conditional trigger corresponding to different candidate cell groups, and each candidate cell group corresponds to a configuration (which may be represented by an RRC reconfiguration message) for including the candidate cell group in the mobility management configuration for the conditional trigger. When the terminal device selects a certain candidate cell group as the target cell group, the terminal device applies this candidate cell group (i.e., target cell group) configuration. If the RRC reconfiguration message indicates that the target cell group is to be accessed, the RRC reconfiguration is applied, corresponding terminal equipment behavior is performed, and access to the target cell group is attempted. For CHO, CPA, CPC, the configuration of this candidate cell set may be the configuration in parameter condReconfigList.
In the mobility management based on the condition, the terminal equipment realizes the mobility management based on the condition triggering based on the condition of the network configuration and the associated candidate cell, and triggers the mobility management after meeting the condition, and accesses the associated candidate cell. Wherein the conditions of the network configuration may be specific measurement-based events or location-based, time-based events. The associated candidate cells can be candidate primary cells and candidate secondary cells, and the candidate cells respectively correspond to corresponding mobility management CHO and CPC/CPA based on condition triggering. MN initiated CHO, MN initiated CPA/CPC, SN initiated CPC are currently supported. Wherein "/" in the embodiments of the present application means "or".
The CHO, CPA/CPC configurations respectively contain corresponding configuration ID, execution conditions and candidate target cell configurations.
But currently does not support simultaneous CHO and CPA/CPC configuration. To improve robustness, CHO may be combined with CPC/CPA, e.g. including target MCG and candidate SCG for CPC/CPA in CHO, reducing the impact on terminal device throughput.
The cell group may be one or more of a primary cell group (MCG) and a Secondary Cell Group (SCG). Wherein the MCG may include one or more of Primary cells (PCell) and Secondary cells (SCell). Wherein the SCG may comprise one or more of a primary secondary cell (Primary Secondary Cell, PSCell), a secondary cell (SCell).
Cell group selective activation may include cell selective activation or cell activation, e.g., one or more of PCell activation, PSCell activation, SCell activation.
It should be noted that, in this application, the failure recovery method provided in any embodiment may be performed alone or in combination with possible implementation methods in other embodiments, and may also be performed in combination with any technical solution in the related art.
In order to better understand a failure recovery method disclosed in the embodiments of the present application, a description is first given below of a communication system to which the embodiments of the present application are applicable.
Referring to fig. 1, fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application. The communication system may include, but is not limited to, one network device and one terminal device, and the number and form of devices shown in fig. 1 are only used as examples and not limiting to the embodiments of the present application, and may include two or more network devices and two or more terminal devices in practical applications. The communication system shown in fig. 1 is exemplified as including a network device 101 and a terminal device 102.
It should be noted that the technical solution of the embodiment of the present application may be applied to various communication systems. For example: a long term evolution (long term evolution, LTE) system, a fifth generation (5th generation,5G) mobile communication system, a 5G New Radio (NR) system, or other future new mobile communication systems, etc.
The network device 101 in the embodiment of the present application is an entity on the network side for transmitting or receiving signals. For example, the network device 101 may be an evolved NodeB (eNB), a transmission point (transmission reception point, TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (wireless fidelity, wiFi) system, etc. The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device. The network device provided in this embodiment of the present application may be composed of a Central Unit (CU) and a Distributed Unit (DU), where the CU may also be referred to as a control unit (control unit), and the structure of the CU-DU may be used to split the protocol layers of the network device, for example, a base station, where functions of part of the protocol layers are placed in the CU for centralized control, and functions of part or all of the protocol layers are distributed in the DU for centralized control of the DU by the CU.
The terminal device 102 in this embodiment of the present application is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device may also be referred to as a terminal device (terminal), a User Equipment (UE), a Mobile Station (MS), a mobile terminal device (MT), etc. The terminal device may be an automobile with a communication function, a smart car, a mobile phone (mobile phone), a wearable device, a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned-driving (self-driving), a wireless terminal device in teleoperation (remote medical surgery), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), or the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.
Currently, the network device configures mobility configuration of an MCG (Master Cell group, primary cell group) or mobility configuration of an SCG (Secondary Cell group ) for the terminal device, and when MCG failure occurs, MCG failure recovery can be performed by using the mobility configuration of the MCG; alternatively, when SCG failure occurs, SCG failure recovery is performed using the mobility configuration of SCG. However, in the case where 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, no study of failure recovery is performed.
It may be understood that, the communication system described in the embodiments of the present application is for more clearly describing the technical solution of the embodiments of the present application, and is not limited to the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the system architecture and the appearance of a new service scenario, the technical solution provided in the embodiments of the present application is equally applicable to similar technical problems.
The failure recovery method and the device thereof provided by the application are described in detail below with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 is a flowchart of a failure recovery method according to an embodiment of the present application. The method may be performed by the terminal device in fig. 1. As shown in fig. 2, the method may include, but is not limited to, the steps of:
Step S201: in response to failure, performing failure recovery based on mobility configuration of the cell group; wherein the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.
In the embodiment of the present application, the failure may include a cell group failure, where the cell group includes cells, i.e., the cell group failure may include a cell failure. The cell group can comprise a main cell group and an auxiliary cell group, the main cell group can comprise a main cell and an auxiliary cell, the auxiliary cell group can comprise a main cell and an auxiliary cell, namely, the cell group failure can be the main cell group failure or the auxiliary cell group failure, and the cell failure can be the main cell failure in the main cell group or the main and auxiliary cell failure in the auxiliary cell group. The cell failure may also be a secondary cell failure, for example, a secondary cell in the primary cell group, or a secondary cell failure in the secondary cell group.
The failure also includes that the failure recovery is performed and failure occurs. In one implementation, after the terminal device fails to recover by reporting the failure information, it enters an idle state, or rolls back to the source primary cell group configuration, or triggers a reestablishing process, or recovers by mobility configuration based on the cell group.
Wherein the primary cell group failure may include, but is not limited to, at least one of the following failures: a primary cell group radio link failure, a primary cell group conditional handover failure, a primary cell group activation failure, and a primary cell group synchronization reconfiguration failure.
Wherein the secondary cell group failure may include, but is not limited to, at least one of the following failures: the radio link of the auxiliary cell group fails, the change of the conditional primary and secondary cells fails, the addition of the conditional primary and secondary cells fails, the activation of the auxiliary cell group fails, and the synchronous reconfiguration of the auxiliary cell group fails.
In some embodiments, the occurrence of a failure may also include, but is not limited to, any one or more of the following, and upon detection of one or more of the following failures, the terminal device may perform failure recovery based on the mobility configuration of the cell group:
detecting that the MCG radio link fails and t316 is not configured; detecting radio link failure of the MCG and suspending SCG transmission; detecting MCG radio link failure in the PSCell changing or PSCell adding process; a synchronization reconfiguration failure occurs at the MCG; NR mobility failure; when the integrity check failure indication is from the lower layer and related to SRB1 or SRB2, except that the integrity check failure is detected in the RRC reestablishment message; RRC connection reconfiguration failure; detecting a radio link failure of the SCG while the MCG transmission is suspended; when MCG transmission is suspended and SCG synchronization failure is reconfigured; when the MCG transmission is suspended, the SCG change fails; an SCG configuration failure occurs when MCG transmission is suspended; an integrity check failure indication for SRB3 when the MCG is on hold and from a lower layer of the SCG; when T316 expires.
In some embodiments, the primary cell group radio link failure may be a failure timer timeout corresponding to the primary cell in the primary cell group. The secondary cell group radio link failure may be a timeout of a primary cell corresponding failure timer in the secondary cell group. The failure timer may be T310 or T312, that is, if only one timer expires, a radio link failure occurs.
In some embodiments, the detection of a radio link failure RLF by the terminal includes, but is not limited to, any one or more of the following: in the first case, the timer T310 determines that RLF is detected when it expires in PCell/PSCell. In the second case, the timer T312 determines that RLF is detected when it expires in PCell/PSCell. In a third case, when none of the timers T300, T301, T304, T311, and T319 are running, the MCG MAC issues a random access problem indication; or when the SCG RLC indicates that the maximum number of retransmissions has been reached, determining that RLF is detected. In the fourth case, when the MCG/SCG RLC indicates that the maximum number of retransmissions has been reached, it is determined that RLF is detected. In a fifth case, if connected as an IAB node, the detection of RLF is determined after receiving a BH RLF indication on the BAP entity from the MCG/SCG. Sixth, when the timer T304 is not running, the MCG MAC issues a consistent upstream LBT fault indication; or the SCG MAC sends out a consistent uplink LBT fault indication to determine that RLF is detected.
The failure of the primary cell group may refer to failure of the primary cell group or failure of a cell in the primary cell group. The failure of the secondary cell group may refer to failure of the secondary cell group or failure of a cell in the secondary cell group.
The primary cell group may include only the primary cell, and the primary cell group failure may be a primary cell failure; the secondary cell group may include only primary and secondary cells, and the secondary cell group failure may be primary and secondary cell failure.
Wherein, the candidate cell group refers to an optional cell group provided in mobility configuration of the cell group. When the terminal equipment selects a certain candidate cell group based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group forms the cell group accessed currently.
In the embodiment of the application, in one example, mobility of the candidate primary cell group is a conditional handover CHO of the candidate primary cell group; mobility of candidate secondary cell group, CPC is changed for the conditional primary and secondary cells of candidate secondary cell group or CPA is added for the conditional primary and secondary cells. And the candidate primary cell group and the candidate secondary cell group have an association relationship, or the candidate primary cell group and the candidate secondary cell group have no association relationship.
For example, the network device is configured with cho+cpa/CPC configuration, with CHO being executed while its associated CPA/CPC is executed.
In another example, the mobility of the candidate primary cell set is selectively activated for the cell set of the candidate primary cell set; the mobility of the candidate secondary cell group is selectively activated for the cell group of the candidate secondary cell group. And the candidate primary cell group and the candidate secondary cell group have an association relationship, or the candidate primary cell group and the candidate secondary cell group have no association relationship.
For example, the network device configures MCG and SCG selective activation, and when the MCG and SCG selective activation are triggered, the UE activates the MCG and SCG simultaneously.
In the embodiment of the application, in failure recovery based on mobility configuration of a cell group, a manner of selecting a cell for failure recovery includes at least one of the following manners: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting a cell for failure recovery, the present solution is not limited.
For example, when the terminal device selects a target cell to be accessed (a target cell for failure recovery) for failure recovery, the selection method includes, but is not limited to: (1) In the reconstruction process, executing the cell selection and selection; (2) According to the network configuration, the protocol specifies or the terminal device implements selection of candidate target cells for failure recovery from the candidate target cells of the network configuration.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In one example, upon receiving a message sent by a network device that contains a mobility configuration, a terminal device stores or updates the stored mobility configuration in accordance with the message sent by the network device.
In one example, the terminal device stores the mobility configuration using terminal variables, which may be UE variable, also referred to as Var variables.
In the embodiment of the application, the mobility configuration stored by the terminal device may include a mobility configuration of a candidate primary cell group and/or a mobility configuration of a candidate secondary cell group.
In the embodiment of the application, the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group exist simultaneously, which means that the network equipment configures the terminal equipment to perform mobility of the MCG and the SCG simultaneously. In some embodiments, the network device configuring the terminal device to perform cho+cpa/CPC configuration simultaneously may include at least one of the following:
cho and CPA/CPC configurations are contained in the same conditional reconfiguration entry corresponding to the same conditional reconfiguration ID:
a) Corresponding to the same execution condition or different execution conditions; b) Corresponding to the same candidate target configuration (one rrcrecon configuration contains the configuration of the target MCG and the configuration of the target SCG) or different candidate target configurations.
Cho and CPA/CPC configurations are independent conditional reconfiguration entries, but are associated.
The configuration of the candidate target cell of the CHO comprises the configuration of the associated CPA/CPC, namely the execution condition of the corresponding CPA/CPC and the configuration of the candidate PScell.
In some embodiments, the network device configuring the terminal device for simultaneous selective activation of MCG and SCG may include at least one of:
the configuration of mcg activation and SCG activation is contained in the same cell group selective activation entry, corresponding to the same activation configuration ID:
a) Corresponding to the same activation condition or different activation conditions (the activation conditions may be configured); b) Corresponding to the same "cell to be activated" configuration (one rrcrecon configuration contains the configuration of the target MCG and the configuration of the target SCG) or different "cell to be activated" configurations.
The configuration of mcg activation and SCG activation is an independent conditional reconfiguration entry, but is associated.
The configuration of the 'cell to be activated' of the MCG comprises the configuration of a plurality of associated SCGs 'cells to be activated'.
In the embodiment of the 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. And the candidate primary cell group and the candidate secondary cell group have an association relationship, or the candidate primary cell group and the candidate secondary cell group have no association relationship. Wherein the mobility configuration of the one cell group may store one entry in a list of mobility configurations for the terminal device.
In another example, the mobility configuration in a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group. The trigger conditions may include, among other things, the trigger conditions of the candidate primary cell group and the trigger conditions of the candidate secondary cell group in one example. In another example, the trigger condition may be one, the candidate primary cell group and the candidate secondary cell group being common, that is, the trigger condition of the candidate primary cell group and the trigger condition of the candidate secondary cell group are the same. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups. Wherein the mobility configuration of the single-pick cell group may store one entry in a list of mobility configurations for the terminal device.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
In the failure recovery method, in response to failure, terminal equipment performs failure recovery based on mobility configuration of a cell group; the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group, so that the terminal equipment can perform failure recovery processing under the condition that the network equipment configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal equipment at the same time, and the terminal equipment is convenient to perform failure recovery based on the mobility configuration of the cell group.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 3, fig. 3 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1.
The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the application, the mobility configuration of the candidate master 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. And the candidate primary cell group and the candidate secondary cell group have an association relationship, or the candidate primary cell group and the candidate secondary cell group have no association relationship. Wherein the mobility configuration of the one cell group may store one entry in a list of mobility configurations for the terminal device.
Based on the mobility configuration of the cell group in the above example, as shown in fig. 3, the method may include, but is not limited to, the steps of:
step S301: in response to the secondary cell group failure occurring, a cell for failure recovery is selected.
In the embodiment of the application, in failure recovery based on mobility configuration of a cell group, a manner of selecting a cell for failure recovery includes at least one of the following manners: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting a cell for failure recovery, the present solution is not limited. The selected cell for failure recovery may be a primary and secondary cell.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In one example, upon receiving a message sent by a network device that contains a mobility configuration, a terminal device stores or updates the stored mobility configuration in accordance with the message sent by the network device.
In one example, the terminal device stores the mobility configuration using terminal variables, which may be UE variable, also referred to as Var variables.
In the embodiment of the application, the mobility configuration stored by the terminal device may include a mobility configuration of a candidate primary cell group and/or a mobility configuration of a candidate secondary cell group.
Wherein, the candidate cell group refers to an optional cell group provided in mobility configuration of the cell group. When the terminal equipment selects a certain candidate cell group based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group forms the cell group accessed currently.
In one example, in response to a secondary cell group failure occurring, the terminal device may perform cell selection during the re-establishment to obtain a primary secondary cell for failure recovery.
In another example, in response to a secondary cell group failure occurring, the terminal device may select a primary secondary cell for failure recovery from a mobility configuration of the cell group in accordance with a network configuration.
In another example, in response to a secondary cell group failure occurring, the terminal device may select a primary secondary cell for failure recovery from a cell group mobility configuration as specified by the protocol.
In another example, in response to the occurrence of a secondary cell group failure, the terminal device may select a primary secondary cell targeted for failure recovery in accordance with a mobility configuration of the terminal device implementation cell group.
Wherein the secondary cell group failure may include, but is not limited to, at least one of the following failures: the radio link of the auxiliary cell group fails, the change of the conditional primary and secondary cells fails, the addition of the conditional primary and secondary cells fails, the activation of the auxiliary cell group fails, and the synchronous reconfiguration of the auxiliary cell group fails.
Step S302: and when the cell for failure recovery is a cell in the first candidate auxiliary cell group, performing auxiliary cell group failure recovery based on the first candidate auxiliary cell group configuration in the mobility configuration of the first candidate auxiliary cell group.
In the embodiment of the present application, when the cell for failure recovery is a primary secondary cell in the first candidate secondary cell group, the terminal device may perform secondary cell group failure recovery based on the first candidate secondary cell group configuration in the mobility configuration of the first candidate secondary cell group. Wherein the mobility configuration of the first candidate secondary cell group exists in the mobility configuration of one cell group.
Wherein the number of the first candidate secondary cell groups may be one or more. That is, the cell for failure recovery may be a primary and secondary cell in one first candidate secondary cell group, or may be a primary and secondary cell in a plurality of first candidate secondary cell groups.
In one implementation, the first candidate secondary cell group is a secondary cell group associated with a primary cell group to which the terminal device is currently accessing.
In one implementation, the mobility configuration of the first candidate secondary cell group may be included in the mobility configuration of the secondary cell group stored by the terminal device.
In another example, when the cell for failure recovery is not a cell in any one candidate secondary cell group, the terminal device may send a reestablishment request message to the network device, request to reestablish an RRC connection with the cell for failure recovery, or enter an idle state.
For example, when the configuration of the candidate target PCell corresponding to the MCG mobility and the configuration of the candidate target PSCell corresponding to the SCG mobility are independent, the terminal device may apply the configuration of the corresponding candidate target PCell and/or the configuration of the candidate target PSCell when performing MCG failure recovery and/or SCG failure recovery.
In the above example, when performing SCG failure recovery, only the PSCell to be accessed is selected as the PSCell corresponding to the SCG associated with the MCG accessed by the terminal device, and the SCG failure recovery can be performed by using the configuration of the corresponding candidate target PSCell, otherwise, RRC reestablishment is performed or IDLE is entered.
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 for failure recovery. For another example, after step S301, the terminal device may directly enter the idle state. That is, step S301 and step S302 are independent steps, and step S302 is not necessarily performed after step S301, nor is step S301 necessarily performed before step S302.
In the failure recovery method, in response to failure of the secondary cell group, a cell for failure recovery is selected; when the cell for failure recovery is a cell in a first candidate auxiliary cell group, performing auxiliary cell group failure recovery based on the first candidate auxiliary cell group configuration in the mobility configuration of the first candidate auxiliary cell group, wherein the mobility configuration of the candidate main cell group exists in the mobility configuration of one cell group; the mobility configuration of the candidate auxiliary cell group exists in the mobility configuration of another cell group, so that when the network equipment configures the mobility configuration of the MCG and the mobility configuration of the SCG for the terminal equipment at the same time, the terminal equipment can perform auxiliary cell group failure recovery processing aiming at the auxiliary cell group failure based on the mobility configuration of the cell group.
In one implementation: the mobility configurations of different candidate secondary cell groups may be present in different cell group mobility configuration entries, e.g. the mobility configuration of candidate secondary cell group a is present in the mobility configuration of one cell group and the mobility configuration of candidate secondary cell group B is present in the mobility configuration of another cell group.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 4, fig. 4 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1.
The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the present application, in one example, the mobility configuration of a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
The trigger conditions may include, among other things, the trigger conditions of the candidate primary cell group and the trigger conditions of the candidate secondary cell group in one example. In another example, the trigger condition may be one, and the candidate primary cell group and the candidate secondary cell group are common, that is, the trigger condition of the candidate primary cell group and the trigger condition of the candidate secondary cell group are the same.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups.
Wherein the mobility configuration of the candidate secondary cell group comprises: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
Based on the mobility configuration of the cell group in the two examples described above, as shown in fig. 4, the method may include, but is not limited to, the steps of:
step S401: in response to the occurrence of a primary cell group failure, a cell for failure recovery is selected.
In the embodiment of the application, in failure recovery based on mobility configuration of a cell group, a manner of selecting a cell for failure recovery includes at least one of the following manners: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting a cell for failure recovery, the present solution is not limited. The cell selected for failure recovery may be the primary cell.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In one example, upon receiving a message sent by a network device that contains a mobility configuration, a terminal device stores or updates the stored mobility configuration in accordance with the message sent by the network device.
In one example, the terminal device stores the mobility configuration using terminal variables, which may be UE variable, also referred to as Var variables.
In the embodiment of the application, the mobility configuration stored by the terminal device may include a mobility configuration of a candidate primary cell group and/or a mobility configuration of a candidate secondary cell group.
Wherein, the candidate cell group refers to an optional cell group provided in mobility configuration of the cell group. When the terminal equipment selects a certain candidate cell group based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group forms the cell group accessed currently.
Wherein the primary cell group failure may include, but is not limited to, at least one of the following failures: a primary cell group radio link failure, a primary cell group conditional handover failure, a primary cell group activation failure, and a primary cell group synchronization reconfiguration failure.
Step S402: when the cell for failure recovery is the cell in the second candidate primary cell group, releasing the secondary cell group currently accessed by the terminal equipment, and/or carrying out primary cell group failure recovery and secondary cell group connection based on the configuration of the second candidate primary cell group and the configuration of the second candidate secondary cell group; and the second candidate auxiliary cell group is an auxiliary cell group associated with the second candidate main cell group.
In one example, when the terminal device is currently accessed with the secondary cell group, the terminal device may release the currently accessed secondary cell group when the cell for failure recovery is a cell in the second candidate primary cell group; and then performing primary cell group failure recovery and secondary cell group connection based on the second candidate primary cell group configuration and the second candidate secondary cell group configuration.
In another example, when the terminal device is not currently accessing the secondary cell group, the terminal device may perform primary cell group failure recovery and secondary cell group connection based on the second candidate primary cell group configuration and the second candidate secondary cell group configuration when the cell for failure recovery is a cell in the second candidate primary cell group.
Wherein 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 one implementation, the second candidate primary cell group configuration may be included in a mobility configuration of the primary cell group stored by the terminal device.
In one implementation, the mobility configuration of the second candidate secondary cell group may be included in the mobility configuration of the secondary cell group stored by 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 (i.e., 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 cell group selectively activated entry). When the terminal equipment performs MCG failure recovery, only configuration information of MCG in the configuration can be applied; alternatively, the source SCG connection is released and this configuration information is applied. When performing SCG failure recovery, only configuration information of the SCG in this configuration may be applied. The source SCG connection is the SCG connection which is accessed by the terminal equipment currently.
For example, when the configuration of SCG mobility is included in the candidate target cell configuration corresponding to the mobility configuration of MCG. If the trigger condition of SCG mobility is included in the MCG candidate target configuration (the trigger condition of the associated CPAC is included in the CHO corresponding rrcrecon configuration), a PSCell for SCG failure recovery may be selected based on whether the trigger condition is satisfied, or after MCG failure recovery is performed, the SCG mobility configuration included therein is applied, and the trigger event is evaluated.
In the above two examples, when MCG failure recovery is performed, if MCG recovery is performed by using the configuration of a certain candidate target PCell, the terminal device may release the source SCG connection (if any), apply the candidate target configuration corresponding to the candidate target PCell and the corresponding PSCell, and establish the corresponding SCG connection while recovering the MCG connection.
For example, candidate target configurations include: (1) Configuration of candidate target cells for CHO, CPA/CPC; (2) Configuration of cell groups to be activated for MCG activation, SCG activation.
After step S401, other steps may be performed instead of step S402. That is, step S401 and step S402 are independent steps, and step S402 is not necessarily performed after step S401, and step S401 is not necessarily performed before step S402.
The following examples are illustrative. Assume that the terminal device is currently accessing to the primary cell PCell0 in the primary cell group MCG0, and is currently accessing to the primary and secondary cells PSCell0 in the secondary cell group SCG 0. Wherein, the terminal equipment receives the mobility configuration of the cell group sent by the network equipment. The mobility configuration of a cell group includes: trigger condition of conditional switch CHO + condition primary secondary cell change trigger condition of CPC, configuration of candidate primary cell group (including PCell 1) and configuration of candidate secondary cell group (including PSCell 1). The mobility configuration of another cell group includes: trigger condition of conditional switch CHO + condition primary secondary cell change trigger condition of CPC, configuration of candidate primary cell group (including PCell 2) and configuration of candidate secondary cell group (including PSCell 2).
When the terminal device detects a radio link failure of MCG0, the terminal device performs one or more of the following: starting a reestablishment process, and selecting a main cell for failure recovery in cell selection; in response to the existence of the candidate primary cell group including the primary cell, failure recovery processing is performed based on the configuration of the candidate primary cell group.
In one example, the primary cell selected for failure recovery may be PCell1, and then the terminal device may release PSCell0 and then apply the configuration of the candidate primary cell group (including PCell 1) and the configuration of the candidate secondary cell group (including PSCell 1) to perform failure recovery processing.
In another example, in cell selection, PCell2 is selected, the terminal device may release PSCell0, and then apply the configuration of the candidate primary cell group (including PCell 2) and the configuration of the candidate secondary cell group (including PSCell 2) to perform failure recovery processing.
In the failure recovery method, in response to failure of a main cell group, a cell for failure recovery is selected; when the cell for failure recovery is the cell in the second candidate primary cell group, releasing the secondary cell group currently accessed by the terminal equipment, and/or carrying out primary cell group failure recovery and secondary cell group connection based on the configuration of the second candidate primary cell group and the configuration of the second candidate secondary cell group; the second candidate secondary cell group is a secondary cell group associated with the second candidate primary cell group, so that when the network equipment simultaneously configures mobility configuration of the MCG and mobility configuration of the SCG for the terminal equipment and the association relationship exists between the MCG and the SCG, the terminal equipment can perform primary cell group failure recovery processing aiming at primary cell group failure based on the mobility configuration of the cell group.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 5, fig. 5 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1.
The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the present application, in one example, the mobility configuration of a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
The trigger conditions may include, among other things, the trigger conditions of the candidate primary cell group and the trigger conditions of the candidate secondary cell group in one example. In another example, the trigger condition may be one, the candidate primary cell group and the candidate secondary cell group being common, that is, the trigger condition of the candidate primary cell group and the trigger condition of the candidate secondary cell group are the same.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups.
Wherein the mobility configuration of the candidate secondary cell group comprises: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
Based on the mobility configuration of the cell group in the two examples described above, as shown in fig. 5, the method may include, but is not limited to, the steps of:
step S501: in response to the occurrence of a primary cell group failure, a cell for failure recovery is selected.
In the embodiment of the application, in failure recovery based on mobility configuration of a cell group, a manner of selecting a cell for failure recovery includes at least one of the following manners: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting a cell for failure recovery, the present solution is not limited. The cell selected for failure recovery may be the primary cell.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In one example, upon receiving a message sent by a network device that contains a mobility configuration, a terminal device stores or updates the stored mobility configuration in accordance with the message sent by the network device.
In one example, the terminal device stores the mobility configuration using terminal variables, which may be UE variable, also referred to as Var variables.
In the embodiment of the application, the mobility configuration stored by the terminal device may include a mobility configuration of a candidate primary cell group and/or a mobility configuration of a candidate secondary cell group.
Wherein, the candidate cell group refers to an optional cell group provided in mobility configuration of the cell group. When the terminal equipment selects a certain candidate cell group based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group forms the cell group accessed currently.
Wherein the primary cell group failure may include, but is not limited to, at least one of the following failures: a primary cell group radio link failure, a primary cell group conditional handover failure, a primary cell group activation failure, and a primary cell group synchronization reconfiguration failure.
Step S502: when the cell for failure recovery is a cell in the third candidate master cell group, master cell group failure recovery is performed based on the third candidate master cell group configuration.
Wherein the number of the third candidate primary cell groups may be one or more. Step S502 may be performed when the primary cell group failure occurs but the secondary cell group failure does not occur, or when the primary cell group failure occurs and the secondary cell group failure occurs.
In one implementation, the third candidate primary cell group configuration may be included in the mobility configuration of the primary cell group stored by the terminal device.
In addition, if the secondary cell group failure also occurs, a primary secondary cell for failure recovery may be selected, and secondary cell group failure recovery may be performed based on candidate secondary cell group configuration including the primary secondary cell.
It should be noted that, in one implementation, if the primary cell group failure occurs, 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 same entry in the mobility configuration list, the primary cell group failure recovery may be performed only by using the third candidate primary cell group configuration, and the third candidate secondary cell group configuration in the entry is ignored. For example, when MCG failure recovery is performed, if MCG recovery is performed by using the configuration of a certain candidate target PCell, the configuration information of the MCG in the candidate target configuration is applied, the configuration information of the SCG is ignored, and the MCG connection is recovered.
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 (i.e., 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 cell group selectively activated entry). When the terminal equipment performs MCG failure recovery, only configuration information of MCG in the configuration can be applied; alternatively, the source SCG connection is released and this configuration information is applied. When performing SCG failure recovery, only configuration information of the SCG in this configuration may be applied. The source SCG connection is the SCG connection which is accessed by the terminal equipment currently.
For example, when the configuration of SCG mobility is included in the candidate target cell configuration corresponding to the mobility configuration of MCG. If the trigger condition of SCG mobility is included in the MCG candidate target configuration (the trigger condition of the associated CPAC is included in the CHO corresponding rrcrecon configuration), a PSCell for SCG failure recovery may be selected based on whether the trigger condition is satisfied, or after MCG failure recovery is performed, the SCG mobility configuration included therein is applied, and the trigger event is evaluated.
In the above two examples, when MCG failure recovery is performed, if MCG recovery is performed by using the configuration of a certain candidate target PCell, the configuration information of the MCG in the candidate target configuration is applied, and the configuration information of the SCG is ignored, so as to recover the MCG connection.
For example, candidate target configurations include: (1) Configuration of candidate target cells for CHO, CPA/CPC; (2) Configuration of cell groups to be activated for MCG activation, SCG activation.
After step S501, other steps may be performed instead of step S502. That is, step S501 and step S502 are independent steps, and step S502 is not necessarily performed after step S501, and step S501 is not necessarily performed before step S502. Wherein the other steps performed are, for example, in response to the cell 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 an RRC connection with the cell for failure recovery, or enter an idle state, which is not specifically limited herein.
In the failure recovery method, in response to failure of a main cell group, a cell for failure recovery is selected; when the cell 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, so that when the network device configures mobility configuration of the MCG and mobility configuration of the SCG for the terminal device at the same time and the association relationship exists between the MCG and the SCG, the terminal device can perform secondary cell group failure recovery processing based on the mobility configuration of the cell group for primary cell group failure.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 6, fig. 6 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1. The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the present application, in one example, the mobility configuration of a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
The trigger conditions may include, among other things, the trigger conditions of the candidate primary cell group and the trigger conditions of the candidate secondary cell group in one example. In another example, the trigger condition may be one, the candidate primary cell group is common to the candidate secondary cell group, that is, the trigger condition of the candidate primary cell group and the trigger condition of the candidate secondary cell group are the same.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups.
Wherein the mobility configuration of the candidate secondary cell group comprises: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
Based on the mobility configuration of the cell group in the two examples described above, as shown in fig. 6, the method may include, but is not limited to, the steps of:
step S601: and in response to the occurrence of the radio link failure of the secondary cell group, sending a reestablishment request message to the network equipment so as to reestablish the secondary cell group connection.
In the embodiment of the application, an association relationship exists between the candidate primary cell group and the candidate secondary cell group. When the radio link of the secondary cell group fails, if the primary and secondary cells for failure recovery are reselected, the secondary cell group comprising the primary and secondary cells may not be the secondary cell group associated with the primary cell group currently accessed by the terminal device. Thus, when the secondary cell group radio link fails, a reestablishment request message may be sent to the network device for secondary cell group connection reestablishment.
In one implementation, when there is an association between a candidate primary cell group and a candidate secondary cell group, the secondary cell group radio link fails, failure recovery is not supported or allowed through the mobility configuration of the cell group.
In one implementation, in response to the occurrence of a secondary cell group radio link failure, the terminal device releases the secondary cell group when there is an association between the candidate primary cell group and the candidate secondary cell group.
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 (i.e., 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 cell group selectively activated entry). When the terminal equipment performs MCG failure recovery, only configuration information of MCG in the configuration can be applied; alternatively, the source SCG connection is released and this configuration information is applied. When performing SCG failure recovery, only configuration information of the SCG in this configuration may be applied. The source SCG connection is the SCG connection which is accessed by the terminal equipment currently.
For example, when the configuration of SCG mobility is included in the candidate target cell configuration corresponding to the mobility configuration of MCG. If the trigger condition of SCG mobility is included in the MCG candidate target configuration (the trigger condition of the associated CPAC is included in the CHO corresponding rrcrecon configuration), a PSCell for SCG failure recovery may be selected based on whether the trigger condition is satisfied, or after MCG failure recovery is performed, the SCG mobility configuration included therein is applied, and the trigger event is evaluated.
In the above two examples, if the SCG RLF needs to perform SCG failure recovery, the terminal device may send an RRC reestablishment request message to perform SCG connection reestablishment.
For example, candidate target configurations include: (1) Configuration of candidate target cells for CHO, CPA/CPC; (2) Configuration of cell groups to be activated for MCG activation, SCG activation.
According to the failure recovery method, in response to the occurrence of the radio link failure of the secondary cell group, a reestablishment request message is sent to the network equipment to reestablish the secondary cell group connection, so that under the condition that the network equipment simultaneously configures mobility configuration of the MCG and mobility configuration of the SCG for the terminal equipment and the association relationship exists between the MCG and the SCG, the terminal equipment can conduct connection reestablishment processing aiming at the radio link failure of the secondary cell group.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 7, fig. 7 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1.
The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the present application, in one example, the mobility configuration of a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
The trigger conditions may include, among other things, the trigger conditions of the candidate primary cell group and the trigger conditions of the candidate secondary cell group in one example. In another example, the trigger condition may be one, the candidate primary cell group and the candidate secondary cell group being common, that is, the trigger condition of the candidate primary cell group and the trigger condition of the candidate secondary cell group are the same.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups.
Wherein the mobility configuration of the candidate secondary cell group comprises: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
Based on the mobility configuration of the cell group in the two examples described above, as shown in fig. 7, the method may include, but is not limited to, the steps of:
step S701: in response to a secondary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility, a cell for failure recovery is selected.
In the embodiment of the application, in failure recovery based on mobility configuration of a cell group, a manner of selecting a cell for failure recovery includes at least one of the following manners: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting a cell for failure recovery, the present solution is not limited. The selected cell for failure recovery may be a primary and secondary cell.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In one example, upon receiving a message sent by a network device that contains a mobility configuration, a terminal device stores or updates the stored mobility configuration in accordance with the message sent by the network device.
In one example, the terminal device stores the mobility configuration using terminal variables, which may be UE variable, also referred to as Var variables.
In the embodiment of the application, the mobility configuration stored by the terminal device may include a mobility configuration of a candidate primary cell group and/or a mobility configuration of a candidate secondary cell group.
Wherein, the candidate cell group refers to an optional cell group provided in mobility configuration of the cell group. When the terminal equipment selects a certain candidate cell group based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group forms the cell group accessed currently.
Wherein the primary cell group failure may include, but is not limited to, at least one of the following failures: a primary cell group radio link failure, a primary cell group conditional handover failure, a primary cell group activation failure, and a primary cell group synchronization reconfiguration failure.
Step S702: when the cell for failure recovery is a cell in the fourth candidate secondary cell group, performing secondary cell group failure recovery based on the fourth candidate secondary cell group configuration; and the fourth candidate auxiliary cell group is an auxiliary cell group associated with the main cell group which is accessed by the terminal equipment currently.
Wherein the number of fourth candidate secondary cell groups may be one or more. In addition, if the cell 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 for connection reestablishment of the secondary cell group including the cell for failure recovery.
In one implementation, 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, the primary cell group currently accessed by the terminal device is a cell group successfully accessed by the terminal device for performing primary cell group mobility.
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 (i.e., 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 cell group selectively activated entry). When the terminal equipment performs MCG failure recovery, only configuration information of MCG in the configuration can be applied; alternatively, the source SCG connection is released and this configuration information is applied. When performing SCG failure recovery, only configuration information of the SCG in this configuration may be applied. The source SCG connection is the SCG connection which is accessed by the terminal equipment currently.
For example, when the configuration of SCG mobility is included in the candidate target cell configuration corresponding to the mobility configuration of MCG. If the trigger condition of SCG mobility is included in the MCG candidate target configuration (the trigger condition of the associated CPAC is included in the CHO corresponding rrcrecon configuration), a PSCell for SCG failure recovery may be selected based on whether the trigger condition is satisfied, or after MCG failure recovery is performed, the SCG mobility configuration included therein is applied, and the trigger event is evaluated.
In the above two examples, if 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 equipment can perform the mobility of the SCG and apply the corresponding configuration of the SCG in the candidate target configuration.
For example, candidate target configurations include: (1) Configuration of candidate target cells for CHO, CPA/CPC; (2) Configuration of cell groups to be activated for MCG activation, SCG activation.
After step S701, other steps may be performed instead of step S702. That is, step S701 and step S702 are independent steps, and step S702 is not necessarily performed after step S701, and step S701 is not necessarily performed before step S702.
The failure recovery method of the embodiment of the application responds to the failure of the secondary cell group when the mobility of the primary cell group and the mobility of the secondary cell group are executed, and selects a cell for failure recovery; when the cell for failure recovery is a cell in the fourth candidate secondary cell group, performing secondary cell group failure recovery based on the fourth candidate secondary cell group configuration; the fourth candidate secondary cell group is a secondary cell group associated with a primary cell group to which the terminal equipment is currently connected, so that when the network equipment simultaneously configures mobility configuration of the MCG and mobility configuration of the SCG for the terminal equipment and the association relationship exists between the MCG and the SCG, if secondary cell group failure occurs when the mobility of the primary cell group and the mobility of the secondary cell group are executed, the terminal equipment can perform failure recovery of the secondary cell group based on the mobility configuration of the cell group.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 8, fig. 8 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1.
The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the present application, in one example, the mobility configuration of a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
The trigger conditions may include, among other things, the trigger conditions of the candidate primary cell group and the trigger conditions of the candidate secondary cell group in one example. In another example, the trigger condition may be one, the candidate primary cell group and the candidate secondary cell group being common, that is, the trigger condition of the candidate primary cell group and the trigger condition of the candidate secondary cell group are the same.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups.
Wherein the mobility configuration of the candidate secondary cell group comprises: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
Based on the mobility configuration of the cell group in the two examples described above, as shown in fig. 8, the method may include, but is not limited to, the steps of:
step S801: in response to primary cell group failure and secondary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility, a cell for failure recovery is selected.
In the embodiment of the application, in failure recovery based on mobility configuration of a cell group, a manner of selecting a cell for failure recovery includes at least one of the following manners: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting a cell for failure recovery, the present solution is not limited. The cell selected for failure recovery may be the primary cell.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In one example, upon receiving a message sent by a network device that contains a mobility configuration, a terminal device stores or updates the stored mobility configuration in accordance with the message sent by the network device.
In one example, the terminal device stores the mobility configuration using terminal variables, which may be UE variable, also referred to as Var variables.
In the embodiment of the application, the mobility configuration stored by the terminal device may include a mobility configuration of a candidate primary cell group and/or a mobility configuration of a candidate secondary cell group.
Wherein, the candidate cell group refers to an optional cell group provided in mobility configuration of the cell group. When the terminal equipment selects a certain candidate cell group based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group forms the cell group accessed currently.
Wherein the primary cell group failure may include, but is not limited to, at least one of the following failures: a primary cell group radio link failure, a primary cell group conditional handover failure, a primary cell group activation failure, and a primary cell group synchronization reconfiguration failure.
Wherein the secondary cell group failure may include, but is not limited to, at least one of the following failures: the radio link of the auxiliary cell group fails, the change of the conditional primary and secondary cells fails, the addition of the conditional primary and secondary cells fails, the activation of the auxiliary cell group fails, and the synchronous reconfiguration of the auxiliary cell group fails.
In some embodiments, the occurrence of a failure may also include, but is not limited to, any one or more of the following, and upon detection of one or more of the following failures, the terminal device may perform failure recovery based on the mobility configuration of the cell group:
detecting that the MCG radio link fails and t316 is not configured; detecting radio link failure of the MCG and suspending SCG transmission; detecting MCG radio link failure in the PSCell changing or PSCell adding process; a synchronization reconfiguration failure occurs at the MCG; NR mobility failure; when the integrity check failure indication is from the lower layer and related to SRB1 or SRB2, except that the integrity check failure is detected in the RRC reestablishment message; RRC connection reconfiguration failure; detecting a radio link failure of the SCG while the MCG transmission is suspended; when MCG transmission is suspended and SCG synchronization failure is reconfigured; when the MCG transmission is suspended, the SCG change fails; an SCG configuration failure occurs when MCG transmission is suspended; an integrity check failure indication for SRB3 when the MCG is on hold and from a lower layer of the SCG; when T316 expires.
In some embodiments, the primary cell group radio link failure may be a failure timer timeout corresponding to the primary cell in the primary cell group. The secondary cell group radio link failure may be a timeout of a primary cell corresponding failure timer in the secondary cell group. The failure timer may be T310 or T312, that is, if only one timer expires, a radio link failure occurs.
In some embodiments, the detection of a radio link failure RLF by the terminal includes, but is not limited to, any one or more of the following: in the first case, the timer T310 determines that RLF is detected when it expires in PCell/PSCell. In the second case, the timer T312 determines that RLF is detected when it expires in PCell/PSCell. In a third case, when none of the timers T300, T301, T304, T311, and T319 are running, the MCG MAC issues a random access problem indication; or when the SCG RLC indicates that the maximum number of retransmissions has been reached, determining that RLF is detected. In the fourth case, when the MCG/SCG RLC indicates that the maximum number of retransmissions has been reached, it is determined that RLF is detected. In a fifth case, if connected as an IAB node, the detection of RLF is determined after receiving a BH RLF indication on the BAP entity from the MCG/SCG. Sixth, when the timer T304 is not running, the MCG MAC issues a consistent upstream LBT fault indication; or the SCG MAC sends out a consistent uplink LBT fault indication to determine that RLF is detected.
The failure of the primary cell group may refer to failure of the primary cell group or failure of a cell in the primary cell group. The failure of the secondary cell group may refer to failure of the secondary cell group or failure of a cell in the secondary cell group.
The primary cell group may include only the primary cell, and the primary cell group failure may be a primary cell failure; the secondary cell group may include only primary and secondary cells, and the secondary cell group failure may be primary and secondary cell failure.
For example, the primary cell group failure and the secondary cell group failure include one or more of: (1) MCG RLF; (2) SCG RLF; (3) upon triggering MCG and SGC mobility, MCG failure occurs; (4) SCG failure occurs when MCG and SGC mobility is triggered; (5) CHO failure; (6) CPA/CPC failure; (7) MCG activation failure; (8) SCG activation fails.
Illustratively, the primary cell group failure and the secondary cell group failure may be one or more of: (1) MCG RLF, SCG RLF; (2) When triggering the mobility of the MCG and the SGC, the MCG failure occurs, and the SCG failure occurs; (3) CHO failure, CPA/CPC failure; (4) failure of MCG activation, failure of SCG activation.
Step S802: when the cell for failure recovery is a cell in the fifth candidate primary cell group, performing primary cell group failure recovery and secondary cell group failure recovery based on the fifth candidate primary cell group configuration and the fifth candidate secondary cell group configuration; and the fifth candidate auxiliary cell group is an auxiliary cell group associated with the fifth candidate main cell group.
Wherein the number of the fifth candidate primary cell group may be one or more; the number of fifth candidate secondary cell groups may be one or more. Wherein the mobility configuration of the fifth candidate primary cell group may be included in the mobility configuration of the primary cell group stored by 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 by 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 (i.e., 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 cell group selectively activated entry). When the UE performs MCG failure recovery, only configuration information of the MCG in the configuration may be applied. Or release the source SCG connection, applying this configuration information. When performing SCG failure recovery, only configuration information of the SCG in this configuration may be applied.
For example, when the configuration of SCG mobility is included in the candidate target cell configuration corresponding to the mobility configuration of MCG. If the trigger condition of SCG mobility is included in the MCG candidate target configuration (the trigger condition of the associated CPAC is included in the CHO corresponding rrcrecon configuration), a PSCell for SCG failure recovery may be selected based on whether the trigger condition is satisfied, or after MCG failure recovery is performed, the SCG mobility configuration included therein is applied, and the trigger event is evaluated.
In the above two examples, if mobility of the MCG and the SCG is triggered, and the MCG and the SCG fail to occur simultaneously, the terminal device may select the PCell for failure recovery and the PSCell associated therewith to recover connection of the MCG and the SCG, and apply candidate target configurations corresponding to the selected PCell and PSCell.
For example, candidate target configurations include: (1) Configuration of candidate target cells for CHO, CPA/CPC; (2) Configuration of cell groups to be activated for MCG activation, SCG activation.
After step S801, other steps may be performed instead of step S802. That is, step S801 and step S802 are independent steps, and step S802 is not necessarily performed after step S801, and step S801 is not necessarily performed before step S802.
According to the failure recovery method, a cell for failure recovery is selected in response to primary cell group failure and secondary cell group failure of executing primary cell group mobility and secondary cell group mobility; when the cell for failure recovery is a cell in the fifth candidate primary cell group, performing primary cell group failure recovery and secondary cell group failure recovery 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, so that when the network device configures mobility configuration of the MCG and mobility configuration of the SCG for the terminal device at the same time and the association relationship exists between the MCG and the SCG, if primary cell group failure and secondary cell group failure occur when primary cell group mobility and secondary cell group mobility are executed, 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.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 9, fig. 9 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1.
The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the application, the mobility configuration of the single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
In the mobility configuration of the candidate auxiliary cell groups, the number of the candidate auxiliary cell groups can be multiple, and each candidate auxiliary cell group corresponds to a triggering condition; the trigger conditions for 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 fig. 9, the method may include, but is not limited to, the steps of:
step S901: and in response to secondary cell group failure occurring when the primary cell group mobility and the secondary cell group mobility are performed, selecting a target secondary cell group from the mobility configuration of the primary cell group currently accessed by the terminal equipment, wherein the triggering condition of the target secondary cell group is 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 primary and secondary cells for failure recovery from the mobility configuration of the primary cell group currently accessed by the terminal device, and taking the secondary cell group including the primary and secondary cells as the target secondary cell group.
Wherein the number of target secondary cell groups may be one or more. The manner 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 manners: selecting a primary cell and a secondary cell for failure recovery from the mobility configuration of the cell group according to the network configuration; selecting a primary and secondary cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target for failure recovery primary and secondary cells according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting the primary and secondary cells for failure recovery, the present solution is not limited.
The target cell group refers to a cell group to be accessed selected by the terminal equipment based on configuration information for mobility; after the target cell group is determined, the terminal device executes corresponding configuration, and after the target cell group is successfully accessed, the target cell group forms the cell group which the terminal device is currently accessed. Wherein, the candidate cell group refers to an optional cell group provided in 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 groups, the candidate cell groups form the target cell group.
In one implementation, the primary cell group currently accessed by the terminal device is a cell group successfully accessed by the terminal device for performing primary cell group mobility.
Step S902: and carrying out failure recovery of the secondary cell group based on the configuration of the target secondary cell group.
For example, when the configuration of SCG mobility is included in the candidate target cell configuration corresponding to the mobility configuration of MCG. If the trigger condition of SCG mobility is included in the MCG candidate target cell configuration (for example, the trigger condition of the MCG candidate target cell configuration includes the association of the cpcc in the rrcrecon configuration corresponding to CHO), the PCell for the SCG failure recovery may be selected based on whether the trigger condition is satisfied, or after the MCG failure recovery is performed, the SCG mobility configuration included therein is applied, and the trigger event is evaluated.
In the above example, when the MCG candidate target cell configuration includes the SCG mobility configuration triggered by the event, when the PSCell for recovery is selected, the PSCell satisfying the trigger event is selected for SCG recovery.
In the failure recovery method, in response to failure of executing the primary cell group mobility and the secondary cell group occurring in the secondary cell group mobility, a target secondary cell group is selected from mobility configuration of the primary cell group currently accessed by the terminal equipment, wherein a triggering condition of the target secondary cell group is met; and performing secondary cell group failure recovery based on target secondary cell group configuration, so that when the network equipment simultaneously configures mobility configuration of the MCG and mobility configuration of the SCG for the terminal equipment and the mobility configuration of the MCG comprises the mobility configuration of the SCG, if secondary cell group failure occurs when main cell group mobility and secondary cell group mobility are executed, the terminal equipment can perform secondary cell group failure recovery based on secondary cell group configuration associated with the currently accessed main cell group in the mobility configuration of the cell group.
After step S901, other steps may be performed instead of step S902. That is, step S901 and step S902 are independent steps, and step S902 is not necessarily performed after step S901, nor is step S901 necessarily performed before step S902.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 10, fig. 10 is a flowchart of another failure recovery method provided in an embodiment of the present application, where the method may be performed by the terminal device in fig. 1.
The failure recovery method may be performed alone, in combination with any one of the embodiments or possible implementations of the embodiments, or in combination with any one of the technical solutions of the related art.
In the embodiment of the application, the mobility configuration of the single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group. Wherein the mobility configuration of the single cell group may store one entry in a list of mobility configurations for the terminal device.
In the mobility configuration of the candidate auxiliary cell groups, the number of the candidate auxiliary cell groups can be multiple, and each candidate auxiliary cell group corresponds to a triggering condition; the trigger conditions for multiple candidate secondary cell groups may be the same or different.
Wherein, the candidate cell group refers to an optional cell group provided in mobility configuration of the cell group. When the terminal equipment selects a certain candidate cell group based on the mobility configuration of the cell group and accesses the candidate cell group, the candidate cell group forms the cell group accessed currently.
Based on the mobility configuration of the cell group in the above example, as shown in fig. 10, the method may include, but is not limited to, the steps of:
step S1001: in response to a primary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility, a cell for failure recovery is selected.
In the embodiment of the application, in failure recovery based on mobility configuration of a cell group, a manner of selecting a cell for failure recovery includes at least one of the following manners: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to mobility configuration of a cell group realized by a terminal device; or other methods of selecting a cell for failure recovery, the present solution is not limited. The cell selected for failure recovery may be the primary cell.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In one example, upon receiving a message sent by a network device that contains a mobility configuration, a terminal device stores or updates the stored mobility configuration in accordance with the message sent by the network device.
In one example, the terminal device stores the mobility configuration using terminal variables, which may be UE variable, also referred to as Var variables.
In the embodiment of the application, the mobility configuration stored by the terminal device may include a mobility configuration of a candidate primary cell group and/or a mobility configuration of a candidate secondary cell group.
Wherein the primary cell group failure may include, but is not limited to, at least one of the following failures: a primary cell group radio link failure, a primary cell group conditional handover failure, a primary cell group activation failure, and a primary cell group synchronization reconfiguration failure.
Wherein the secondary cell group failure may include, but is not limited to, at least one of the following failures: the radio link of the auxiliary cell group fails, the change of the conditional primary and secondary cells fails, the addition of the conditional primary and secondary cells fails, the activation of the auxiliary cell group fails, and the synchronous reconfiguration of the auxiliary cell group fails.
Step S1002: when the cell for failure recovery is a cell in the sixth candidate master cell group, master cell group failure recovery is performed based on the sixth candidate master cell group configuration.
Wherein the number of sixth candidate primary cell groups may be one or more.
In one implementation, the sixth candidate primary cell group configuration may be included in the mobility configuration of the primary cell group stored by the terminal device.
Step S1003: and storing the triggering condition and configuration of the candidate secondary cell group in the sixth candidate primary cell group configuration.
Step S1004: and accessing the sixth candidate auxiliary cell group based on the sixth candidate auxiliary cell group configuration when the triggering condition of the sixth candidate auxiliary cell group in the sixth candidate main cell group configuration is met.
Wherein 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 trigger conditions for some candidate secondary cell groups may be the same or different.
In one implementation, the sixth candidate secondary cell group configuration may be included in the mobility configuration of the primary cell group stored by the terminal device.
In the embodiment of the present application, when the primary cell group failure recovery is performed based on the sixth candidate primary cell group configuration, the trigger condition of each candidate secondary cell group in the sixth candidate primary cell group configuration may not be satisfied. At this time, the triggering conditions and configuration of each candidate secondary cell group can be stored first; and accessing the sixth candidate secondary cell group based on the sixth candidate secondary cell group configuration when the trigger condition of the sixth candidate secondary cell group is satisfied.
For example, when the configuration of SCG mobility is included in the candidate target cell configuration corresponding to the mobility configuration of MCG. If the trigger condition of SCG mobility is included in the MCG candidate target cell configuration (for example, the trigger condition of the MCG candidate target cell configuration includes the association of the cpcc in the rrcrecon configuration corresponding to CHO), the PCell for the SCG failure recovery may be selected based on whether the trigger condition is satisfied, or after the MCG failure recovery is performed, the SCG mobility configuration included therein is applied, and the trigger event is evaluated.
In the above example, when MCG failure recovery is performed and a candidate target cell configuration corresponding to the corresponding MCG mobility is applied, the terminal device may directly store the configuration of the SCG mobility included in the configuration, evaluate a corresponding trigger event, and access the corresponding candidate target SCG when the trigger event is satisfied.
The following examples are illustrative. Assume that the terminal device is currently accessing to the primary cell PCell0 in the primary cell group MCG0, and is currently accessing to the primary and secondary cells PSCell0 in the secondary cell group SCG 0. Wherein, the terminal equipment receives the mobility configuration of the cell group sent by the network equipment. The mobility configuration of a cell group includes: conditional switch CHO trigger condition, configuration of candidate primary cell group (including PCell 1). Wherein the configuration of the candidate primary cell group (including PCell 1) includes: the conditional primary and secondary cells change the configuration of the trigger condition 1+ candidate secondary cell group (including PSCell 1) of the CPC, the conditional primary and secondary cells change the configuration of the trigger condition 2+ candidate secondary cell group (including PSCell 2) of the CPC, and so on.
When the terminal device detects a radio link failure of MCG0, the terminal device performs one or more of the following: starting a reestablishment process, and selecting a main cell for failure recovery in cell selection; in response to the existence of the candidate primary cell group containing the primary cell, performing failure recovery processing based on the configuration of the candidate primary cell group; and responding to the configuration of the candidate primary cell group including the configuration of the secondary cell group, and performing processing such as trigger condition evaluation on the configuration of the secondary cell group.
In cell selection, in one example, the primary cell selected for failure recovery may be PCell1, with primary cell group failure recovery being performed using a configuration of candidate primary cell groups (including PCell 1); the configuration of the trigger condition 1+ candidate secondary cell group (including PSCell 1) of the conditional primary and secondary cells changing CPC and the configuration of the trigger condition 2+ candidate secondary cell group (including PSCell 2) of the conditional primary and secondary cells changing CPC may be stored.
Thereafter, in one example, if the terminal device successfully accesses PCell1, the trigger condition of CPC is evaluated, and when the trigger condition 2 of CPC is found to be satisfied, CPC is executed, and the configuration of the candidate secondary cell group (including PSCell 2) is applied to access PSCell2. In another example, if the terminal device does not successfully access PCell1, a failed recovery failure is determined.
According to the failure recovery method, when the primary cell group failure occurs in the primary cell group mobility and the secondary cell group mobility, the primary cell group failure recovery is performed based on the configuration of the sixth candidate primary cell group including the selected cells for failure recovery; when the triggering condition of the sixth candidate auxiliary cell group is met, the sixth candidate auxiliary cell group is accessed, so that when the network equipment simultaneously configures mobility configuration of the MCG and mobility configuration of the SCG for the terminal equipment, and the mobility configuration of the MCG comprises the mobility configuration of the SCG, if the primary cell group failure occurs when the primary cell group mobility and the auxiliary cell group mobility are executed, the terminal equipment can recover the primary cell group failure based on the sixth candidate primary cell group configuration in the mobility configuration of the cell group; and accessing the sixth candidate secondary cell group based on the sixth candidate secondary cell group configuration when the trigger condition of the sixth candidate secondary cell group in the sixth candidate primary cell group configuration is satisfied.
After step S1001, other steps may be performed instead of step S1002. That is, step S1001 and step S1002 are independent steps, and step S1002 is not necessarily performed after step S1001, and step S1001 is also not necessarily performed before step S1002. Similarly, step S1004 may not be executed after step S1003. Step S1003 and step S1004 are independent steps.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
Referring to fig. 11, fig. 11 is a flowchart of another failure recovery method according to an embodiment of the present application, where the method may be performed by the network device in fig. 1. As shown in fig. 11, the method may include, but is not limited to, the steps of:
step S1101: transmitting mobility configuration of the cell group to the terminal equipment; wherein, the failure recovery process of the terminal equipment 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 the embodiment of the application, in one example, mobility of the candidate primary cell group is a conditional handover CHO of the candidate primary cell group; mobility of candidate secondary cell group, CPC is changed for the conditional primary and secondary cells of candidate secondary cell group or CPA is added for the conditional primary and secondary cells. And the candidate primary cell group and the candidate secondary cell group have an association relationship, or the candidate primary cell group and the candidate secondary cell group have no association relationship.
For example, the network device is configured with cho+cpa/CPC configuration, with CHO being executed while its associated CPA/CPC is executed.
In another example, the mobility of the candidate primary cell set is selectively activated for the cell set of the candidate primary cell set; the mobility of the candidate secondary cell group is selectively activated for the cell group of the candidate secondary cell group. And the candidate primary cell group and the candidate secondary cell group have an association relationship, or the candidate primary cell group and the candidate secondary cell group have no association relationship.
For example, the network device configures MCG and SCG selective activation, and when the MCG and SCG selective activation are triggered, the UE activates the MCG and SCG simultaneously.
In the embodiment of the present application, the mobility configuration of the cell group may be a mobility configuration stored by the terminal device; the mobility configuration of a cell group may also be referred to as mobility configuration.
In the embodiment of the application, the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group, namely the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group coexist, and the network equipment configures the terminal equipment to simultaneously perform the mobility of the MCG and the SCG. In some embodiments, the network device configuring the terminal device to perform cho+cpa/CPC configuration simultaneously may include at least one of the following:
Cho and CPA/CPC configurations are contained in the same conditional reconfiguration entry corresponding to the same conditional reconfiguration ID:
a) Corresponding to the same execution condition or different execution conditions; b) Corresponding to the same candidate target configuration (one rrcrecon configuration contains the configuration of the target MCG and the configuration of the target SCG) or different candidate target configurations.
Cho and CPA/CPC configurations are independent conditional reconfiguration entries, but are associated.
The configuration of the candidate target cell of the CHO comprises the configuration of the associated CPA/CPC, namely the execution condition of the corresponding CPA/CPC and the configuration of the candidate PScell.
In some embodiments, the network device configuring the terminal device for simultaneous selective activation of MCG and SCG may include at least one of:
the configuration of mcg activation and SCG activation is contained in the same cell group selective activation entry, corresponding to the same activation configuration ID:
a) Corresponding to the same activation condition or different activation conditions (the activation conditions may be configured); b) Corresponding to the same "cell to be activated" configuration (one rrcrecon configuration contains the configuration of the target MCG and the configuration of the target SCG) or different "cell to be activated" configurations.
The configuration of mcg activation and SCG activation is an independent conditional reconfiguration entry, but is associated.
The configuration of the 'cell to be activated' of the MCG comprises the configuration of a plurality of associated SCGs 'cells to be activated'.
In the embodiment of the 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. And the candidate primary cell group and the candidate secondary cell group have an association relationship, or the candidate primary cell group and the candidate secondary cell group have no association relationship. Wherein the mobility configuration of the one cell group may store one entry in a list of mobility configurations for the terminal device.
In another example, the mobility configuration in a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group. The trigger conditions may include, among other things, the trigger conditions of the candidate primary cell group and the trigger conditions of the candidate secondary cell group in one example. In another example, the trigger condition may be one, the candidate primary cell group and the candidate secondary cell group being common, that is, the trigger condition of the candidate primary cell group and the trigger condition of the candidate secondary cell group are the same.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups.
In another example, the mobility configuration in a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group includes: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; the candidate master cell group configuration comprises the following steps: mobility configuration of candidate secondary cell groups associated with candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
In the embodiment of the application, the network device may also configure a manner of selecting a cell for failure recovery for the terminal device, so as to perform failure recovery based on mobility configuration of the cell group; the manner of selecting a cell for failure recovery includes at least one of: performing cell selection in 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 a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; 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, the present solution is not limited.
According to the failure recovery method, the network equipment can send the mobility configuration of the cell group to the terminal equipment; wherein, the failure recovery process of the terminal equipment is based on the mobility configuration of the cell group; the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group, so that the terminal equipment can perform failure recovery processing under the condition that the mobility configuration of the MCG and the mobility configuration of the SCG coexist, and the terminal equipment can perform failure recovery based on the mobility configuration of the cell group conveniently.
It should be noted that these possible implementations may be performed alone or in combination, and the embodiments of the present application are not limited in this regard.
In the embodiments provided in the present application, the method provided in the embodiments of the present application is described from the perspective of the network device and the terminal device, respectively. In order to implement the functions in the method provided in the embodiment of the present application, the network device and the first terminal device may include a hardware structure, a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Some of the functions described above may be implemented in a hardware structure, a software module, or a combination of a hardware structure and a software module.
Fig. 12 is a schematic structural diagram of a communication device 120 according to an embodiment of the present application. The device is applied to terminal equipment, and comprises: a processing unit 1201, configured to perform failure recovery based on mobility configuration of a cell group in response to occurrence of a failure; wherein the mobility configuration of the cell group comprises 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 the candidate master 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 one embodiment, the processing unit 1201 is further configured to perform one or more of the following: in response to the occurrence of a secondary cell group failure, selecting a cell for failure recovery; and when the cell for failure recovery is a cell in the first candidate auxiliary cell group, performing auxiliary cell group failure recovery based on first candidate auxiliary cell group configuration in mobility configuration of the first candidate auxiliary cell group.
In an embodiment, the processing unit 1201 is further configured to send a reestablishment request message to the network device when the cell for failure recovery is not a cell in any one candidate secondary cell group, request to reestablish an RRC connection with the cell for failure recovery, or enter an idle state.
In one embodiment, the mobility configuration of one cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: a candidate primary cell group configuration and a candidate secondary cell group configuration associated with the candidate primary cell group.
In one embodiment, the mobility configuration of one cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: a triggering condition of a candidate primary cell group, and/or the candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: and the mobility configuration of the candidate auxiliary cell group associated with the candidate main cell group.
In one embodiment, the processing unit 1201 is further configured to perform one or more of the following: selecting a cell for failure recovery in response to occurrence of a primary cell group failure; when the cell for failure recovery is a cell in a second candidate primary cell group, releasing a secondary cell group which is currently accessed by the terminal equipment, and/or carrying out primary cell group failure recovery and secondary cell group connection based on the second candidate primary cell group configuration and the second candidate secondary cell group configuration; and the second candidate auxiliary cell group is an auxiliary cell group associated with the second candidate main cell group.
In one embodiment, the processing unit 1201 is further configured to perform one or more of the following: selecting a cell for failure recovery in response to occurrence of a primary cell group failure; and when the cell for failure recovery is a cell in a third candidate master cell group, performing master cell group failure recovery based on the configuration of the third candidate master cell group.
In one embodiment, the processing unit 1201 is further configured to send a reestablishment request message to the network device for reestablishing the secondary cell group connection in response to occurrence of a secondary cell group radio link failure.
In one embodiment, the processing unit 1201 is further configured to perform one or more of the following: selecting a cell for failure recovery in response to a secondary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility; when the cell for failure recovery is a cell in a fourth candidate auxiliary cell group, performing auxiliary cell group failure recovery based on the fourth candidate auxiliary cell group configuration; and the fourth candidate auxiliary cell group is an auxiliary cell group associated with the main cell group which is accessed by the terminal equipment currently.
In one embodiment, the processing unit 1201 is further configured to perform one or more of the following: selecting 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; when the cell for failure recovery is a cell in a fifth candidate primary cell group, performing primary cell group failure recovery and secondary cell group failure recovery based on the fifth candidate primary cell group configuration and a fifth candidate secondary cell group configuration; and the fifth candidate secondary cell group is a secondary cell group associated with the fifth candidate primary cell group.
In one embodiment, the mobility configuration for a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: mobility configuration of candidate secondary cell groups associated with the candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
In one embodiment, the processing unit 1201 is further configured to perform one or more of the following: in response to secondary cell group failure occurring when performing primary cell group mobility and secondary cell group mobility, selecting a target secondary cell group from a mobility configuration of a primary cell group currently accessed by the terminal device, wherein a trigger condition of the target secondary cell group is satisfied; and carrying out failure recovery of the secondary cell group based on the configuration of the target secondary cell group.
In one embodiment, the processing unit 1201 is further configured to perform one or more of the following: selecting a cell for failure recovery in response to a primary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility; when the cell for failure recovery is a cell in a sixth candidate master cell group, performing master cell group failure recovery based on a sixth candidate master cell group configuration; storing the triggering condition and configuration of the candidate auxiliary cell group in the sixth candidate main cell group configuration; and accessing the sixth candidate auxiliary cell group based on the sixth candidate auxiliary cell group configuration when the triggering condition of the sixth candidate auxiliary cell group in the sixth candidate main cell group configuration is met.
In one embodiment, the mobility of the candidate primary cell set is a conditional handover CHO of the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group changes CPC for the conditional main and auxiliary cells of the candidate auxiliary cell group or adds CPA for the conditional main and auxiliary cells.
In one embodiment, the mobility of the candidate primary cell set is selectively activated for the cell set of the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group is selectively activated for the cell group of the candidate auxiliary cell group.
In one embodiment, the failure includes: a primary cell group failure and/or a secondary cell group failure; the primary cell group failure includes at least one of the following failures: a radio link failure of a main cell group, a conditional handover failure of the main cell group, an activation failure of the main cell group and a synchronous reconfiguration failure of the main cell group; the secondary cell group failure includes at least one of the following failures: the radio link of the auxiliary cell group fails, the change of the conditional primary and secondary cells fails, the addition of the conditional primary and secondary cells fails, the activation of the auxiliary cell group fails, and the synchronous reconfiguration of the auxiliary cell group fails.
In one embodiment, in failure recovery based on mobility configuration of a cell group, the manner in which a cell for failure recovery is selected includes at least one of: performing cell selection in the reconstruction process to obtain the cell for failure recovery; selecting a cell for failure recovery from the mobility configuration of the cell group according to the network configuration; selecting a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; selecting a target cell for failure recovery according to the mobility configuration of the cell group implemented by the terminal device.
Fig. 13 is a schematic structural diagram of another communication device 130 according to an embodiment of the present application. The apparatus is applied to a network device, and the apparatus includes: a transceiver unit 1301, configured to send mobility configuration of a cell group to a terminal device; wherein the failure recovery procedure of the terminal device is based on the mobility configuration of the cell group; the mobility configuration of the cell group includes a mobility configuration of the candidate primary cell group and a mobility configuration of the candidate secondary cell group.
In one embodiment, the mobility configuration of the candidate master 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 one embodiment, the mobility configuration for a single cell group includes: trigger condition, and/or cell group configuration; wherein the cell group configuration comprises: a candidate primary cell group configuration and a candidate secondary cell group configuration associated with the candidate primary cell group.
In one embodiment, the mobility configuration for a single cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: and the mobility configuration of the candidate auxiliary cell group associated with the candidate main cell group.
In one embodiment, the mobility configuration of one cell group includes: mobility configuration of candidate primary cell groups; the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration; wherein the candidate primary cell group configuration comprises: mobility configuration of candidate secondary cell groups associated with the candidate primary cell groups; the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
In one embodiment, the mobility of the candidate primary cell set is a conditional handover CHO of the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group changes CPC for the conditional main and auxiliary cells of the candidate auxiliary cell group or adds CPA for the conditional main and auxiliary cells.
In one embodiment, the mobility of the candidate primary cell set is selectively activated for the cell set of the candidate primary cell set; and the mobility of the candidate auxiliary cell group associated with the candidate main cell group is selectively activated for the cell group of the candidate auxiliary cell group.
In an embodiment, the transceiving unit 1301 is further configured to configure a manner of selecting a cell for failure recovery for the terminal device, so as to perform failure recovery based on mobility configuration of a cell group; the manner of selecting a cell for failure recovery includes at least one of: performing cell selection in the reconstruction process to obtain the cell for failure recovery; selecting a cell for failure recovery from the mobility configuration of the cell group according to the network configuration; selecting a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification; the cell for failure recovery is selected from the mobility configuration of the cell group according to the terminal device implementation.
Referring to fig. 14, fig. 14 is a schematic structural diagram of another communication device 140 according to 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 system, or a processor that supports the network device to implement the foregoing method, or a chip, a chip system, or a processor that supports the terminal device to implement the foregoing method. The device can be used for realizing the method described in the method embodiment, and can be particularly referred to the description in the method embodiment.
The communications 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, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminal equipment chips, DUs or CUs, etc.), execute computer programs, and process data of the computer programs.
Optionally, the communication device 140 may further include one or more memories 1402, on which a computer program 1404 may be stored, and the processor 1401 executes the computer program 1404, so that the communication device 140 performs the method described in the above method embodiments. Optionally, the memory 1402 may also store data therein. The communication device 140 and the memory 1402 may be provided separately or may be integrated.
Optionally, the communication device 140 may further comprise a transceiver 1405, an antenna 1406. The transceiver 1405 may be referred to as a transceiver unit, a transceiver circuit, or the like, for implementing a transceiver function. The transceiver 1405 may include a receiver, which may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.
Optionally, one or more interface circuits 1407 may also be included in the communication device 140. The interface circuit 1407 is for receiving code instructions and transmitting to the processor 1401. The processor 1401 executes the code instructions to cause the communication device 140 to perform the method described in the method embodiments described above.
The communication device 140 is a terminal device (such as the terminal device in the foregoing method embodiment): the processor 1401 is configured to perform step S201 in fig. 2; steps S301 and S302 in fig. 3 are performed; steps S401, S402 in fig. 4; steps S501, S502 in fig. 5; step S601 in fig. 6; steps S701, S702 in fig. 7; steps S801, S802 in fig. 8; steps S901, S902 in fig. 9; steps S1001, S1002, S1003, S1004 in fig. 10.
The communication apparatus 140 is a network device: the transceiver 1405 is used to perform step S1101 in fig. 11.
In one implementation, a transceiver for implementing the receive and transmit functions may be included in processor 1401. For example, the transceiver may be a transceiver circuit, or an interface circuit. The transceiver circuitry, interface or interface circuitry for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit, interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, interface or interface circuit may be used for transmitting or transferring signals.
In one implementation, the processor 1401 may have a computer program 1404 stored thereon, the computer program 1404 running on the processor 1401 may cause the communication device 140 to perform the method described in the method embodiments described above. The computer program 1404 may be solidified in the processor 1401, in which case the processor 1401 may be implemented in hardware.
In one implementation, the communication device 140 may include circuitry that may implement the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described herein may be implemented on integrated circuits (integrated circuit, ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (application specific integrated circuit, ASIC), printed circuit boards (printed circuit board, PCB), electronic devices, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (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 (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
The communication apparatus described in the above embodiment 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 apparatus described in the present application is not limited thereto, and the structure of the communication apparatus may not be limited by fig. 8. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication device may be:
(1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem; (2) A set of one or more ICs, optionally including storage means for storing data, a computer program; (3) an ASIC, such as a Modem (Modem); (4) modules that may be embedded within other devices; (5) A receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligent device, and the like; (6) others, and so on.
For the case where the communication device may be a chip or a chip system, reference may be made to the schematic structural diagram of the chip shown in fig. 15. The chip shown in fig. 15 includes a processor 1501 and an interface 1502. Wherein the number of processors 1501 may be one or more, and the number of interfaces 1502 may be a plurality.
Optionally, the chip further comprises a memory 1503, the memory 1503 being used for storing the necessary computer programs and data.
Those of skill would further appreciate that the various illustrative logical blocks (illustrative logical block) and steps (steps) described in connection with the embodiments herein may be implemented as electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Those skilled in the art may implement the described functionality in varying ways for each particular application, but such implementation is not to be understood as beyond the scope of the embodiments of the present application.
The embodiment of the application also provides a communication system, which comprises the communication device serving as the terminal device (such as the terminal device in the embodiment of the method) in the embodiment of fig. 12 and the communication device serving as the network device in the embodiment of fig. 13.
The present application also provides a readable storage medium having instructions stored thereon which, when executed by a computer, perform the functions of any of the method embodiments described above.
The present application also provides a computer program product which, when executed by a computer, implements the functions of any of the method embodiments described above.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer programs. When the computer program is loaded and executed on a computer, the flow or functions described in accordance with embodiments of the present application are fully or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer program may be stored in or transmitted from one computer readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means from one website, computer, server, or data center. 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 an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
Those of ordinary skill in the art will appreciate that: the first, second, etc. numbers referred to in this application are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application, but also to indicate the sequence.
At least one of the present application may also be described as one or more, and a plurality may be two, three, four or more, and the present application is not limited thereto. In the embodiment of the present application, for a technical feature, the technical features of the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the technical features described by "first", "second", "third", "a", "B", "C", and "D" are not in sequence or in order of magnitude.
The correspondence relationship shown in each table in the present application may be configured or predefined. The values of the information in each table are merely examples, and may be configured as other values, which are not limited in this application. In the case of the correspondence between the configuration information and each parameter, it is not necessarily required to configure all the correspondence shown in each table. For example, in the table in the present application, the correspondence shown by some rows may not be configured. For another example, appropriate morphing adjustments, e.g., splitting, merging, etc., may be made based on the tables described above. The names of the parameters indicated in the tables may be other names which are understood by the communication device, and the values or expressions of the parameters may be other values or expressions which are understood by the communication device. When the tables are implemented, other data structures may be used, for example, an array, a queue, a container, a stack, a linear table, a pointer, a linked list, a tree, a graph, a structure, a class, a heap, a hash table, or a hash table.
Predefined in this application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (34)
- A failure recovery method, applied to a terminal device, the method comprising:in response to failure, performing failure recovery based on mobility configuration of the cell group;wherein the mobility configuration of the cell group comprises 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 master cell group is present 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 of claim 2, wherein the failure recovery based on the mobility configuration of the cell group in response to the failure, comprises one or more of:in response to the occurrence of a secondary cell group failure, selecting a cell for failure recovery;and when the cell for failure recovery is a cell in the first candidate auxiliary cell group, performing auxiliary cell group failure recovery based on first candidate auxiliary cell group configuration in mobility configuration of the first candidate auxiliary cell group.
- A method according to claim 3, characterized in that the method further comprises:And when the cell for failure recovery is not a cell in any one candidate auxiliary cell group, sending a reestablishment request message to the network equipment, requesting to reestablish RRC connection with the cell for failure recovery, or entering an idle state.
- The method according to claim 1, characterized in that in the mobility configuration of a single cell group comprises: trigger condition, and/or cell group configuration;wherein the cell group configuration comprises: 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 in the mobility configuration of a single cell group comprises: mobility configuration of candidate primary cell groups;the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration;wherein the candidate primary cell group configuration comprises: and the mobility configuration of the candidate auxiliary cell group associated with the candidate main cell group.
- The method of claim 5 or 6, wherein the failure recovery based on the mobility configuration of the cell group in response to the failure, comprises one or more of:Selecting a cell for failure recovery in response to occurrence of a primary cell group failure;when the cell for failure recovery is a cell in the second candidate primary cell group, releasing the secondary cell group which is currently accessed by the terminal equipment, and/or carrying out primary cell group failure recovery and secondary cell group connection based on the second candidate primary cell group configuration and the second candidate secondary cell group configuration;and the second candidate auxiliary cell group is an auxiliary cell group associated with the second candidate main cell group.
- The method of claim 5 or 6, wherein the failure recovery based on the mobility configuration of the cell group in response to the failure, comprises one or more of:selecting a cell for failure recovery in response to occurrence of a primary cell group failure;and when the cell for failure recovery is a cell in the third candidate master cell group, performing master cell group failure recovery based on the configuration of the third candidate master cell group.
- The method according to claim 5 or 6, wherein the responding to the failure, based on the mobility configuration of the cell group, performing failure recovery comprises:and in response to the occurrence of the radio link failure of the secondary cell group, sending a reestablishment request message to the network equipment so as to reestablish the secondary cell group connection.
- The method of claim 5 or 6, wherein the failure recovery based on the mobility configuration of the cell group in response to the failure, comprises one or more of:selecting a cell for failure recovery in response to a secondary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility;when the cell for failure recovery is a cell in a fourth candidate auxiliary cell group, performing auxiliary cell group failure recovery based on fourth candidate auxiliary cell group configuration;and the fourth candidate auxiliary cell group is an auxiliary cell group associated with the main cell group which is accessed by the terminal equipment currently.
- The method of claim 5 or 6, wherein the failure recovery based on the mobility configuration of the cell group in response to the failure, comprises one or more of:selecting 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;when the cell for failure recovery is a cell in the fifth candidate primary cell group, performing primary cell group failure recovery and secondary cell group failure recovery based on the fifth candidate primary cell group configuration and the fifth candidate secondary cell group configuration;And 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, wherein the mobility configuration of a cell group comprises: mobility configuration of candidate primary cell groups;the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration;wherein the candidate primary cell group configuration comprises: mobility configuration of candidate secondary cell groups associated with the candidate primary cell groups;the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
- The method of claim 12, wherein the failure recovery based on the mobility configuration of the cell group in response to the failure occurring comprises one or more of:in response to secondary cell group failure occurring when performing primary cell group mobility and secondary cell group mobility, selecting a target secondary cell group from a mobility configuration of a primary cell group currently accessed by the terminal device, wherein a trigger condition of the target secondary cell group is satisfied;and carrying out failure recovery of the secondary cell group based on the configuration of the target secondary cell group.
- The method of claim 12, wherein the failure recovery based on the mobility configuration of the cell group in response to the failure comprises one or more of:selecting a cell for failure recovery in response to a primary cell group failure occurring to perform primary cell group mobility and secondary cell group mobility;when the cell for failure recovery is a cell in the sixth candidate master cell group, performing master cell group failure recovery based on the configuration of the sixth candidate master cell group;storing the triggering condition and configuration of the candidate auxiliary cell group in the sixth candidate main cell group configuration;and accessing the sixth candidate auxiliary cell group based on the sixth candidate auxiliary cell group configuration when the triggering condition of the sixth candidate auxiliary cell group in the sixth candidate main cell group configuration is met.
- The method of claim 1, wherein the step of determining the position of the substrate comprises,mobility of the candidate primary cell group is a conditional switch CHO of the candidate primary cell group;and the mobility of the candidate auxiliary cell group associated with the candidate main cell group changes CPC for the conditional main and auxiliary cells of the candidate auxiliary cell group or adds CPA for the conditional main and auxiliary cells.
- The method of claim 1, wherein the step of determining the position of the substrate comprises,The mobility of the candidate primary cell group is selectively activated for the cell group of the candidate primary cell group;and the mobility of the candidate auxiliary cell group associated with the candidate main cell group is selectively activated for the cell group of the candidate auxiliary cell group.
- The method of claim 1, wherein the failure comprises: a primary cell group failure and/or a secondary cell group failure;the primary cell group failure includes at least one of the following failures: a radio link failure of a main cell group, a conditional handover failure of the main cell group, an activation failure of the main cell group and a synchronous reconfiguration failure of the main cell group;the secondary cell group failure includes at least one of the following failures: the radio link of the auxiliary cell group fails, the change of the conditional primary and secondary cells fails, the addition of the conditional primary and secondary cells fails, the activation of the auxiliary cell group fails, and the synchronous reconfiguration of the auxiliary cell group fails.
- The method of claim 1, wherein in failure recovery based on the mobility configuration of the cell group, the manner in which the cell is selected for failure recovery comprises at least one of:performing cell selection in the reconstruction process to obtain the cell for failure recovery;Selecting a cell for failure recovery from the mobility configuration of the cell group according to the network configuration;selecting a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification;selecting a target cell for failure recovery according to the mobility configuration of the cell group implemented by the terminal device.
- A method of failure recovery, for use with a network device, the method comprising:transmitting a mobility configuration of a cell group to a terminal device, wherein a 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 comprises 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, wherein the mobility configuration of the candidate master 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 of claim 19, wherein the mobility configuration of a single cell group comprises: trigger condition, and/or cell group configuration;Wherein the cell group configuration comprises: candidate primary cell group configuration and candidate secondary cell group configuration associated with the candidate primary cell group.
- The method of claim 19, wherein the mobility configuration of a single cell group comprises: mobility configuration of candidate primary cell groups;the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration;wherein the candidate primary cell group configuration comprises: and the mobility configuration of the candidate auxiliary cell group associated with the candidate main cell group.
- The method of claim 19, wherein the mobility configuration of a single cell group comprises: mobility configuration of candidate primary cell groups;the mobility configuration of the candidate primary cell group comprises the following steps: triggering conditions of candidate primary cell groups and/or candidate primary cell group configuration;wherein the candidate primary cell group configuration comprises: mobility configuration of candidate secondary cell groups associated with the candidate primary cell groups;the mobility configuration of the candidate secondary cell group comprises the following steps: the triggering condition of the candidate secondary cell group and/or the configuration of the candidate secondary cell group.
- The method of claim 19, wherein the mobility of the candidate set of primary cells is conditional handover CHO for the candidate set of primary cells;and the mobility of the candidate auxiliary cell group associated with the candidate main cell group changes CPC for the conditional main and auxiliary cells of the candidate auxiliary cell group or adds CPA for the conditional main and auxiliary cells.
- The method of claim 19, wherein the mobility of the candidate primary cell set is selectively activated for the cell set of the candidate primary cell set;and the mobility of the candidate auxiliary cell group associated with the candidate main cell group is selectively activated for the cell group of the candidate auxiliary cell group.
- The method of claim 19, wherein the method further comprises:configuring a mode of selecting a cell for failure recovery for the terminal equipment so as to perform failure recovery based on mobility configuration of a cell group;the manner of selecting a cell for failure recovery includes at least one of:performing cell selection in the reconstruction process to obtain the cell for failure recovery;selecting a cell for failure recovery from the mobility configuration of the cell group according to the network configuration;Selecting a cell for failure recovery from a mobility configuration of a cell group according to a protocol specification;the cell for failure recovery is selected from the mobility configuration of the cell group according to the terminal device implementation.
- A failure recovery apparatus, applied to a terminal device, comprising:a processing unit, configured to perform failure recovery based on mobility configuration of a cell group in response to occurrence of failure;wherein the mobility configuration of the cell group comprises the mobility configuration of the candidate primary cell group and the mobility configuration of the candidate secondary cell group.
- A failure recovery apparatus for use with a network device, the apparatus comprising:a transceiver unit, configured to send mobility configuration of a cell group to a terminal device, where a failure recovery procedure of the terminal device is based on the mobility configuration of the cell group;the mobility configuration of the cell group comprises 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 comprises a processor and a memory, the memory having stored therein a computer program, the processor executing the computer program stored in the memory to cause the device to perform the method according to any of claims 1 to 18.
- A communication device, characterized in that the device comprises a processor and a memory, the memory having stored therein a computer program, the processor executing the computer program stored in the memory to cause the device to perform the method of any of claims 19 to 26.
- A communication device, comprising: a processor and interface circuit;the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor;the processor for executing the code instructions to perform the method of any one of claims 1 to 18.
- A communication device, comprising: a processor and interface circuit;the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor;the processor for executing the code instructions to perform the method of any one of claims 19 to 26.
- A computer readable storage medium storing instructions which, when executed, cause a method as claimed in any one of claims 1 to 18 to be implemented.
- A computer readable storage medium storing instructions which, when executed, cause a method as claimed in any one of claims 19 to 26 to be implemented.
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| PCT/CN2022/097456 WO2023236060A1 (en) | 2022-06-07 | 2022-06-07 | Failure recovery method and apparatus thereof |
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| CN110839301B (en) * | 2018-08-16 | 2021-09-10 | 维沃移动通信有限公司 | Information processing method, terminal and network equipment for radio link failure |
| WO2021062839A1 (en) * | 2019-09-30 | 2021-04-08 | 华为技术有限公司 | Communication method and communication apparatus |
| CN113950853B (en) * | 2019-09-30 | 2023-03-10 | 华为技术有限公司 | Communication method and device |
| CN114390640B (en) * | 2020-10-19 | 2024-02-13 | 大唐移动通信设备有限公司 | Method and equipment for judging error type of secondary cell transformation |
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