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WO2024229766A1 - 用于无线通信的方法及终端设备 - Google Patents

用于无线通信的方法及终端设备 Download PDF

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Publication number
WO2024229766A1
WO2024229766A1 PCT/CN2023/093325 CN2023093325W WO2024229766A1 WO 2024229766 A1 WO2024229766 A1 WO 2024229766A1 CN 2023093325 W CN2023093325 W CN 2023093325W WO 2024229766 A1 WO2024229766 A1 WO 2024229766A1
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WIPO (PCT)
Prior art keywords
candidate cell
candidate
terminal device
cell
condition
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Application number
PCT/CN2023/093325
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English (en)
French (fr)
Inventor
尤心
林雪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to PCT/CN2023/093325 priority Critical patent/WO2024229766A1/zh
Priority to CN202380093712.XA priority patent/CN120660383A/zh
Publication of WO2024229766A1 publication Critical patent/WO2024229766A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present application relates to the field of communication technology, and more specifically, to a method and terminal device for wireless communication.
  • the terminal device can perform a handover based on the CHO candidate cell based on the handover conditions associated with the CHO.
  • the terminal device can perform a handover based on the CPAC candidate cell based on the addition/change conditions associated with the CPAC.
  • conditional switching event associated with CHO and the add/change condition associated with CPAC are configured independently, and there may be a situation where the conditional switching event associated with CHO and the add/change condition associated with CPAC are not satisfied at the same time.
  • the communication protocol does not specify the behavior of the terminal device for the above situation.
  • the understanding between the terminal device and the network device is inconsistent, resulting in communication failure between the terminal device and the network device.
  • the present application provides a method and terminal device for wireless communication.
  • the following introduces various aspects involved in the present application.
  • a method for wireless communication comprising: if a condition of a first candidate cell is met and a condition of a second candidate cell is not met, a terminal device performs a first operation; wherein the first candidate cell is a conditional switching CHO candidate cell, the second candidate cell is a conditional primary and secondary cell addition/change CPAC candidate cell, and the first candidate cell is associated with the second candidate cell; wherein the first operation includes one or more of the following: accessing the first candidate cell at the first time; accessing the first candidate cell; releasing or retaining a service secondary cell group SCG; evaluating the second candidate cell; stopping evaluating the second candidate cell; evaluating the first candidate cell; stopping evaluating the first candidate cell; and staying in a source cell.
  • a method for wireless communication including: if the time when the condition of the second candidate cell is met is different from the time when the condition of the first candidate cell is met, the terminal device accesses the first candidate cell at the second time; wherein the first candidate cell is a conditional switching CHO candidate cell, the second candidate cell is a conditional primary and secondary cell addition/change CPAC candidate cell, and the first candidate cell is associated with the second candidate cell.
  • a terminal device comprising: if the condition of a first candidate cell is met and the condition of a second candidate cell is not met, a processing unit is used to perform a first operation; wherein the first candidate cell is a conditional switching CHO candidate cell, the second candidate cell is a conditional primary and secondary cell addition/change CPAC candidate cell, and the first candidate cell is associated with the second candidate cell; wherein the first operation includes one or more of the following: accessing the first candidate cell at the first time; accessing the first candidate cell; releasing or retaining the service secondary cell group SCG; evaluating the second candidate cell; stopping evaluating the second candidate cell; evaluating the first candidate cell; stopping evaluating the first candidate cell; and staying in the source cell.
  • a terminal device including: if the time when the conditions of the second candidate cell are met is different from the time when the conditions of the first candidate cell are met, the processing unit is used to access the first candidate cell at the second time; wherein the first candidate cell is a conditional switching CHO candidate cell, the second candidate cell is a conditional primary and secondary cell addition/change CPAC candidate cell, and the first candidate cell is associated with the second candidate cell.
  • a terminal device comprising a processor, a memory and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory so that the terminal device executes part or all of the steps in the method of the above aspect.
  • an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and/or network device.
  • the system may also include other devices that interact with the terminal device or network device in the solution provided by the embodiment of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device (for example, a terminal device or a network device) to perform some or all of the steps in the methods of the above aspects.
  • a communication device for example, a terminal device or a network device
  • an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a communication device (e.g., a terminal device or a network device) to perform some or all of the steps in the above-mentioned various aspects of the method.
  • the computer program product can be a software installation package.
  • an embodiment of the present application provides a chip comprising a memory and a processor, wherein the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.
  • An embodiment of the present application provides a method for wireless communication to specify the behavior of a terminal device when a conditional switching event associated with a CHO and an add/change condition associated with a CPAC are not simultaneously satisfied, thereby helping to reduce the possibility of communication failure between the terminal device and a network device.
  • FIG. 1 is a wireless communication system 100 to which an embodiment of the present application is applied.
  • FIG. 2 is a schematic diagram of a traditional switching process applicable to an embodiment of the present application.
  • FIG3 is a schematic flowchart of a wireless communication method according to an embodiment of the present application.
  • FIG4 is a schematic diagram of accessing a CPAC candidate cell based on relaxed conditions in an embodiment of the present application.
  • FIG5 is a schematic diagram of a terminal device in an embodiment of the present application.
  • FIG6 is a schematic diagram of a terminal device in another embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the method provided in the embodiments of the present application can be used for various dual-connectivity multi-standard dual-connectivity (multiple RAT dual connectivity, MR-DC) architectures, such as dual connectivity between a fourth-generation (4G) communication system and a fifth-generation (5G) communication system, dual connectivity between a 5G communication system and a 4G communication system, or dual connectivity between a 5G communication system and a 5G communication system, etc.
  • MR-DC multiple RAT dual connectivity
  • the dual connectivity between the 4G communication system and the 5G communication system may include: Evolved universal terrestrial radio access (E-UTRA) system and new radio (NR) system dual connectivity (E-UTRA-NR dual connectivity, EN-DC), and NG-RAN E-UTRA-NR dual connectivity (NGEN-DC) under the 5G core network.
  • EN-DC can also be called option 3 series.
  • EN-DC is based on long term evolution (LTE) base stations.
  • eNB as the master node (MN) or the main base station, uses an NR base station, such as gNB, as the DC of the secondary node (SN) or the secondary base station, and MN and SN can respectively have data plane connections with the evolved packet core (EPC) network, that is, the 4G core network, to provide air interface transmission resources for data between the terminal and the EPC.
  • EPC evolved packet core
  • NGEN-DC can also be called option 7 series.
  • NG EN-DC uses an LTE base station, such as ng-eNB, as the MN, and an NR base station, such as gNB, as the DC of the SN.
  • NG EN-DC both MN and SN are connected to the 5G core network (5G core network, 5GC), to provide air interface transmission resources for data between the terminal and the 5GC.
  • 5G core network 5GC
  • the dual connectivity between the 5G communication system and the 4G communication system may include the dual connectivity between the NR system and the E-UTRA system (NRE-UTRA dual connectivity, NE-DC), etc.
  • NE-DC can also be called option 4 series.
  • NE-DC uses an NR base station, such as gNB, as the MN and an LTE base station, such as ng-eNB, as the SN, and the MN and SN can have data plane connections with the 5GC respectively, providing air interface transmission resources for data between the terminal and the 5GC.
  • the dual connection between the 5G communication system and the 5G communication system may include the DC between the NR system and the NR system.
  • both the MN and the SN are NR base stations.
  • the communication system 10 may include a network device 101, a network device 102, a network device 105, a terminal device 103, and a terminal device 104.
  • Figure 1 is only a schematic diagram and does not constitute a limitation on the applicable scenarios of the technical solution provided in the present application.
  • the network device in FIG. 1 can be any device with a wireless transceiver process. Including but not limited to: evolutionary Node B (NodeB or eNB or e-NodeB) in LTE, base station (gNodeB or gNB) or transmission receiving point (TRP) in NR, subsequent evolution of 3GPP, etc.
  • the base station can be: macro base station, micro base station, micro-micro base station, small station, relay station, or balloon station, etc. Multiple base stations can support the same technology mentioned above, or they can support the networks of different technologies mentioned above.
  • the base station can include one or more co-sited or non-co-sited TRPs.
  • the network device can also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario.
  • CRAN cloud radio access network
  • the terminal in FIG1 namely the terminal device 103 or the terminal device 104, is a device with a wireless transceiver process, which can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, and a satellite, etc.).
  • the terminal can be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver process, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a terminal in industrial control, a vehicle-mounted terminal device, a terminal in self-driving, a terminal in assisted driving, a terminal in remote medical care, a terminal in smart grid, a terminal in transportation safety, a terminal in smart city, etc.
  • the embodiments of the present application do not limit the application scenarios.
  • the terminal may also be sometimes referred to as terminal equipment, user equipment (UE), access terminal, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal equipment, wireless communication equipment, machine terminal, UE agent or UE device, etc.
  • the terminal may be fixed or mobile.
  • the terminal may be a wearable device.
  • Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that apply wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing, and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful processes that are achieved through software support, data interaction, and cloud interaction.
  • wearable smart devices include devices that have complete processes, large sizes, and can be implemented in whole or in part without relying on smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application process and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.
  • the NR system supports the handover process for terminal devices in a connected state.
  • the network equipment switches the communication link between the terminal device and the source cell (also known as the "source base station") to the new cell (also known as the "target cell or target base station"), that is, performs the handover process.
  • step S210 the source network device triggers handover based on the L3 measurement result reported by the terminal device, and sends a handover request (HANDOVER REQUEST) to the target network device where the target cell is located through the Xn interface.
  • HANDOVER REQUEST a handover request
  • step S220 in response to the switching request, the target network device performs admission control.
  • step S230 the target network device sends a handover request confirmation (HANDOVER REQUEST ACKNOWLEDGE) message to the source network device.
  • a handover request confirmation HANDOVER REQUEST ACKNOWLEDGE
  • the RRC configuration of the target cell may be included in the handover request confirmation.
  • step S240 the source network device sends an RRC reconfiguration message to the terminal device, instructing the terminal device to initiate a switching process.
  • the RRC reconfiguration message includes RRC configuration information for accessing the target cell.
  • step S250 the terminal device accesses the target cell.
  • step S260 the terminal device sends an RRC Reconfiguration Complete message to the target network device.
  • terminal device 103 or terminal device 104 can be dual-connected with network device 101 and network device 102, wherein one network device is MN and the other network device is SN.
  • MCG master cell group
  • MCG may include a primary cell (PCell).
  • MCG may include one or more secondary cells (SCell) in addition to PCell.
  • SCell secondary cells
  • SCG secondary cell group
  • SCG may include primary secondary cells (PSCell).
  • SCG may include one or more SCells in addition to PSCell.
  • the terminal device 103 or the terminal device 104 can perform CPAC.
  • the terminal device 103 can perform conditional PSCell addition (CPA) through the following example 1, and perform conditional PSCell change (CPC) through the following example 2.
  • CPA conditional PSCell addition
  • CPC conditional PSCell change
  • Example 1 taking the case where the terminal device 103 establishes an RRC connection with the network device 101, and the terminal device 103 wants to perform CPA and establish a connection with the network device 102 as an example, after the network device 101 establishes an RRC connection with the terminal device 103, one or more candidate PSCells can be configured for the terminal device 103, and the one or more candidate PSCells include the PSCell configured by the network device 102 for the terminal device 103 and the PSCell configured by other network devices for the terminal device 103; the network device 101 sends the configuration information 1 of the one or more candidate PSCells to the terminal device 103, and the configuration information 1 of the candidate PSCell includes the configuration 1 of the candidate PSCell and the adding condition.
  • the terminal device 103 receives the configuration information 1 of the one or more candidate PSCells from the network device 101, and can detect the adding condition of the one or more candidate PSCells. When at least one candidate PSCell that meets the adding condition is detected, the terminal device 103 selects one of the candidate PSCells (such as the candidate PSCell configured by the network device 102 for the terminal) and applies the configuration of the candidate PSCell. Subsequently, the terminal device 103 initiates random access with the candidate PSCell, and after the candidate PSCell random access is successful, establishes dual connections with the network device 101 and the network device 102.
  • the configuration information 1 of the candidate PSCell may also be referred to as the CPA configuration information 1 of the candidate PSCell. There is no restriction on the name of the configuration information.
  • the terminal device 103 when it detects multiple candidate PSCells that meet the adding conditions, it can select a candidate PSCell according to a preset strategy and apply the configuration of the candidate PSCell. For example, when the terminal device 103 detects multiple candidate PSCells that meet the adding conditions, it can randomly select a candidate PSCell and apply the configuration of the candidate PSCell; or, it can select the candidate PSCell with the best signal quality from the multiple candidate PSCells that meet the adding conditions, and apply the configuration of the candidate PSCell; or, it can select the candidate PSCell with the largest number of beams from the multiple candidate PSCells that meet the adding conditions and the number of beams is greater than or equal to the threshold value, and apply the configuration of the candidate PSCell.
  • the above is only an example of the terminal device 103 selecting a candidate PSCell.
  • the terminal device 103 can also select a candidate PSCell in other ways without limitation.
  • Example 2 taking the case where the terminal device 103 is dual-connected with the network device 101 and the network device 102, the network device 101 is the MN, the network device 102 is the SN, and the terminal device 103 wants to perform CPC, the network device 101 can configure one or more candidate PSCells for the terminal device 103; the network device 101 sends the configuration information 2 of the one or more candidate PSCells to the terminal device 103, and the configuration information 2 of the candidate PSCell includes the configuration 2 and the change condition of the candidate PSCell.
  • the terminal device 103 receives the configuration information 2 of the one or more candidate PSCells from the network device 101, and can detect the change condition of the one or more candidate PSCells.
  • the terminal device 103 selects one of the candidate PSCells and applies the configuration of the candidate PSCell. Subsequently, the terminal device 103 initiates random access with the candidate PSCell, and after the random access of the candidate PSCell is successful, a dual connection is established with the network device 101 and the secondary base station to which the candidate PSCell belongs.
  • the configuration information 2 of the candidate PSCell can also be called the CPC configuration information 2 of the candidate PSCell, without limitation.
  • the terminal device 103 when it detects multiple candidate PSCells that meet the change conditions, it can select a candidate PSCell according to a preset strategy and apply the configuration of the candidate PSCell. For example, when the terminal device 103 detects multiple candidate PSCells that meet the change conditions, it can randomly select a candidate PSCell and apply the configuration of the candidate PSCell; or, it can select the candidate PSCell with the best signal quality from the multiple candidate PSCells that meet the change conditions, and apply the configuration of the candidate PSCell; or, it can select the candidate PSCell with the largest number of beams from the multiple candidate PSCells that meet the change conditions and the number of beams is greater than or equal to the threshold value, and apply the configuration of the candidate PSCell.
  • the above is only an example of the terminal device 103 selecting a candidate PSCell.
  • the terminal device 103 can also select a candidate PSCell in other ways without limitation.
  • the configuration information 2 of the candidate PSCell can be collectively referred to as the configuration information of the candidate PSCell
  • the configuration 1 of the candidate PSCell when the terminal performs CPA and the configuration 2 of the candidate PSCell when the terminal performs CPC can be collectively referred to as the configuration of the candidate PSCell.
  • the configuration information of the candidate PSCell includes the configuration and addition/change conditions of the candidate PSCell.
  • the configuration of the candidate PSCell is used for the terminal to communicate with the candidate PSCell after adding the candidate PSCell
  • the addition/change conditions of the candidate PSCell include the addition conditions of the candidate PSCell
  • the addition conditions of the candidate PSCell are used by the terminal to determine whether to add the candidate PSCell.
  • the configuration of the candidate PSCell is used for the terminal to communicate with the candidate PSC after changing the source PSCell to the candidate PSCell.
  • the adding/changing conditions of the candidate PSCell include the changing conditions of the candidate PSCell.
  • the changing conditions of the candidate PSCell are used by the terminal to determine whether to change the source PSCell to the candidate PSCell.
  • the terminal device 103 may also switch from the current MN to a target MN with better signal quality. For example, the terminal device 103 may switch from the network device 101 to the network device 105. Generally, after the terminal device 103 performs MN switching, the current MN releases one or more candidate PSCells configured for the terminal device 103.
  • one or more candidate PSCells may be reconfigured for the terminal device 103, and configuration information of one or more candidate PSCells configured by the target MN for the terminal is sent to the terminal device 103 for the terminal to perform CPAC.
  • the configuration information of one or more candidate PSCells configured by the target MN for the terminal includes the configuration and adding/changing conditions of the candidate PSCell.
  • the configuration and addition/change conditions of a candidate PSCell generally include more information, for example, the configuration of a candidate PSCell includes: an identifier of the configuration of the candidate PSCell, and/or, random access resources allocated by the candidate PSCell to the terminal, and/or, a cell radio network temporary identifier (CRNIT), and/or, a global cell identification code (CGI) of the candidate PSCell, and/or, a physical cell identifier (PCI) of the candidate PSCell, and/or, frequency information corresponding to the candidate PSCell.
  • CCNIT cell radio network temporary identifier
  • CGI global cell identification code
  • PCI physical cell identifier
  • the frequency information corresponding to the candidate PSCell may include one or more of the following: the absolute frequency of the synchronization signal block (such as absoluteFrequency SSB), the absolute frequency position of the reference resource module (common RB0) (such as absoluteFrequencyPointA), a frequency bandwidth list (such as frequencyBandList), a subcarrier spacing (SCS) specific carrier list (such as scs-SpecificCarrierList), etc.
  • the absolute frequency of the synchronization signal block such as absoluteFrequency SSB
  • the absolute frequency position of the reference resource module such as absoluteFrequencyPointA
  • a frequency bandwidth list such as frequencyBandList
  • SCS subcarrier spacing
  • the configuration of the candidate PSCell also includes resource information corresponding to the candidate PSCell, and the resource information corresponding to the candidate PSCell includes one or more of the following: bearer configuration parameters (radioBearerConfig), cell group configuration (cellGroupConfig) parameters, physical layer (physical layer, PHY layer) configuration parameters, media access control (media access control, MAC) layer configuration parameters, radio link control (radio link control, RLC) layer configuration parameters, packet data convergence layer protocol (packet data convergence protocol, PDCP) layer configuration parameters, service data adaptation protocol (service data adaptation protocol, SDAP) layer configuration parameters or RRC layer configuration parameters.
  • bearer configuration parameters radioBearerConfig
  • cellGroupConfig cell group configuration
  • physical layer physical layer, physical layer, PHY layer
  • media access control media access control
  • radio link control radio link control
  • RLC radio link control
  • packet data convergence layer protocol packet data convergence protocol
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • RRC layer configuration parameters service data adaptation protocol
  • the adding/changing conditions of the candidate PSCell are used by the terminal to determine whether to add the candidate PSCell, or to determine whether to change the source PSCell to the candidate PSCell. For example, if the terminal detects that the candidate PSCell satisfies the adding/changing conditions of the candidate PSCell, the terminal determines to add the candidate PSCell, or to change the source PSCell to the candidate PSCell. If the terminal detects that the candidate PSCell does not satisfy the adding/changing conditions of the candidate PSCell, the terminal determines not to add the candidate PSCell, or not to change the source PSCell to the candidate PSCell.
  • the adding/changing condition of the candidate PSCell includes an execution event type of the adding/changing condition of the candidate PSCell, which may also be referred to as a measurement event or a reporting event, etc.
  • the terminal may measure the signal quality of the candidate PSCell, or measure the signal quality of the candidate PSCell and the signal quality of a neighboring cell of the candidate PSCell, and determine whether to add the candidate PSCell or change the source PSCell to the candidate PSCell based on the measurement result and the execution event type.
  • the network device provides the terminal device with a CPAC configuration, and accordingly, the terminal device changes the PSCell based on the CPAC configuration provided by the network device.
  • the network device may determine whether the terminal device needs CPAC based on the service conditions (e.g., transmission delay, amount of data to be transmitted, etc.) and channel measurement conditions (e.g., channel status).
  • the above-mentioned CPAC configuration may include a candidate cell configuration list, execution conditions, and cell configuration.
  • the above candidate cell list can be understood as a candidate cell configuration list for CPA or CPC.
  • the candidate cell list may include cell information of one or more candidate cells.
  • the cell information of each candidate cell may include a configuration information identifier.
  • the configuration information ID can be determined based on the number of candidate cells configured by the network device for the terminal device. For example, if the network device provides 5 candidate cell configurations for the terminal device, then the configuration information ID of the above cell can be used to identify the 5 candidate cell configurations.
  • the above-mentioned execution condition may be an execution condition for instructing the terminal device to execute CPA or CPC, and the execution condition is also called "CPAC condition", or also called a condition for CPAC, or also called a CPAC candidate cell condition.
  • the implementation method of the CPAC condition is not limited.
  • the CPAC condition may include event A3 (CondEvent A3). Accordingly, if the service quality RSRP of the neighboring cell is higher than that of the serving cell (PCell/PSCell) by an absolute threshold, the A3 event switching is triggered.
  • the CPAC condition may include event A4 (CondEvent A4). Accordingly, if the RSRP value of the neighboring cell is greater than the threshold, the A4 event switching is triggered.
  • the CPAC condition may include event A5 (CondEvent A5). Accordingly, the service quality of the serving cell is lower than an absolute threshold 1, and the service quality of the neighboring cell is higher than an absolute threshold 2, triggering the A5 event switching.
  • event A5 CondEvent A5
  • the above cell configuration may be provided by the candidate SN to the SCG configuration of the MN.
  • the above SCG configuration may be sent by the SN to the MN via the Xn interface, and correspondingly, the MN transparently transmits it to the terminal device.
  • the above SCG configuration may include the configuration of the candidate SCG, wherein the configuration of the candidate SCG may include the cell ID, radio bearer configuration, logical channel configuration, RLC configuration, MAC configuration, physical layer configuration, and SCell configuration.
  • an SCG may include one or more SCells. Accordingly, the above-mentioned SCG configuration may include one or more SCell configurations, which is not limited in the embodiments of the present application.
  • CPC and CPA in CPAC can be an or relationship, that is, CPAC in the embodiment of the present application can be replaced by "CPA or CPC" or expressed as "CPA/CPC".
  • the network device can configure one or more CHO candidate cells and one or more conditional switching events associated with the CHO candidate cells to the terminal device. Accordingly, the terminal device can perform a switching condition evaluation task to evaluate whether the conditional switching events associated with the above one or more CHO candidate cells are satisfied. When the conditional switching events associated with the above one or more CHO candidate cells are satisfied, the terminal device can switch from the source cell (or "current serving cell") to the corresponding CHO candidate cell that satisfies the conditional switching event. At this time, the CHO candidate cell accessed by the terminal device can be called a "target cell or target CHO cell.”
  • some communication protocols support carrying SCG configuration information in the CHO candidate cell configuration so that the terminal device can quickly establish a dual link. Since the CHO candidate cell is pre-configured, it may cause the failure of SCG addition to be triggered due to unreasonable SCG cell configuration. Therefore, in other communication protocols (for example, R10), a mechanism combining CHO and CPAC is introduced, also known as the "CHO+CPAC process", that is, the CHO candidate cell can be associated with at least one CPAC candidate cell. In this way, the terminal device can select the corresponding SCG based on the conditions and perform the addition, which helps to improve the situation of unreasonable SCG cell configuration.
  • the CHO performed by the terminal device may be triggered by the serving MN (or the source MN).
  • the CHO candidate cells of the terminal device may be determined by the serving MN (or the source MN).
  • the CPAC performed by the terminal device may be performed by the serving MN (or source MN), the serving SN, the candidate SN,
  • the CPAC candidate cells may be triggered by one or more nodes in the triggering node, and accordingly, the CPAC candidate cells may be determined by the triggering nodes.
  • the CHO candidate cell configuration and/or the CPA/CPC candidate cell configuration may be provided by the candidate MN and/or the candidate SN.
  • the performing of the candidate cell condition evaluation includes evaluating the measurement events associated with the candidate cell condition.
  • the terminal device can perform switching based on the CHO candidate cell based on the switching conditions associated with the CHO.
  • the terminal device can perform switching based on the CPAC candidate cell based on the add/change conditions associated with the CPAC.
  • the conditional switching event associated with the CHO and the add/change conditions associated with the CPAC are configured independently, and there may be a situation where the conditional switching event associated with the CHO and the add/change conditions associated with the CPAC are not met at the same time.
  • the communication protocol does not specify the behavior of the terminal device for the above situation.
  • the understanding between the terminal device and the network device is inconsistent, resulting in communication failure between the terminal device and the network device.
  • an embodiment of the present application provides a method for wireless communication to specify the behavior of the terminal device in the above situation.
  • the method of the embodiment of the present application is introduced below based on scenario 1 and scenario 2.
  • Scenario 1 The conditions of the first candidate cell are met, and the conditions of the second candidate cell are not met.
  • the above-mentioned first candidate cell can be a CHO candidate cell, or a candidate cell associated with CHO.
  • the CHO candidate cell can be used to select an MN, or the CHO candidate cell can be used to select a PCell, or the CHO candidate cell can be used to select an MCG.
  • the condition of the first candidate cell can be understood as the associated CHO switching condition of the first candidate cell, or the switching condition used when executing CHO for the first candidate cell.
  • the condition of the first candidate cell may include a conditional switching event used to execute CHO for the first candidate cell.
  • the terminal device can access the first candidate cell.
  • the number of the first candidate cells is not limited.
  • the first candidate cell may include one or more CHO candidate cells.
  • the following takes the example that the first candidate cell includes one CHO candidate cell.
  • the solution of the embodiment of the present application is also applicable to the case of multiple CHO candidate cells.
  • the above-mentioned second candidate cell can be a CPAC candidate cell, or a candidate cell associated with CPAC.
  • the CPAC candidate cell can be used to select an SN, or the CPAC candidate cell can be used to select a PSCell, or the CPAC candidate cell can be used to select an SCG.
  • the conditions of the second candidate cell can be understood as the associated add/change conditions of the second candidate cell, or the add/change conditions used when executing CPAC for the second candidate cell.
  • the terminal device can access the second candidate cell.
  • accessing the second candidate cell can also be referred to as adding/changing the second candidate cell.
  • the number of the second candidate cells is not limited. For example, there may be one or more second candidate cells.
  • the second candidate cell is associated with the first candidate cell.
  • the configuration information of the second candidate cell is carried in the configuration of the first candidate cell.
  • the first operation includes the terminal device accessing the first candidate cell at the first time.
  • the first time is determined based on the time when the conditions of the second candidate cell are met.
  • the first time may be the time when the conditions of the second candidate cell are met.
  • the first time may also be any time later than the time when the conditions of the second candidate cell are met.
  • the terminal device executing the first operation can be understood as the terminal device accessing the first candidate cell when the conditions of the second candidate cell are met, or in other words, the terminal device waits until the conditions of the second candidate cell are met and then accesses the first candidate cell.
  • the terminal device can access the second candidate cell, that is, if the conditions of the second candidate cell are met, the terminal device accesses the first candidate cell and the second candidate cell.
  • the terminal device may not access the second candidate cell.
  • the above-mentioned condition for satisfying the second candidate cell is not limited.
  • the above-mentioned condition for satisfying the second candidate cell can be understood as, after the condition of the second candidate cell is relaxed, the condition of the second candidate cell is satisfied, or, in other words, the condition of the second candidate cell after relaxation is satisfied, or, in other words, after the measurement of the second candidate cell is relaxed, the condition of the second candidate cell is satisfied.
  • the time for satisfying the condition of the second candidate cell can be determined based on the time corresponding to the condition of the second candidate cell after relaxation is satisfied.
  • the time when the condition of the second candidate cell is satisfied is determined based on the time when the target condition of the second candidate cell is satisfied, the target condition is obtained by relaxing the condition of the second candidate cell, and the target condition is obtained by relaxing the condition of the second candidate cell.
  • the time when the condition of the second candidate cell is satisfied is based on the time when the condition of the second candidate cell is satisfied after the measurement of the second candidate cell is relaxed.
  • the time when the condition of the second candidate cell is satisfied is determined based on the time when the target condition of the second candidate cell is satisfied, and it can be understood that the time when the condition of the second candidate cell is satisfied is equal to the time when the target condition of the second candidate cell is satisfied.
  • the time when the condition of the second candidate cell is satisfied may be later than the time when the target condition of the second candidate cell is satisfied.
  • the terminal device usually monitors the channel conditions of the second candidate cell to determine whether the conditions of the second candidate cell are met, and the terminal device can access the second candidate cell only if the conditions are met within a predefined time period (e.g., trigger time TTT).
  • a predefined time period e.g., trigger time TTT
  • the measurement of the second candidate cell is relaxed, which may include skipping the measurement of the channel conditions of one or more adjacent cells (including the second candidate cell) within the predefined time period, or in other words, there is no need to measure the channel conditions of one or more adjacent cells (including the second candidate cell) within the predefined time period, or in other words, adjusting the duration of the above-mentioned predefined time period to 0.
  • the above-mentioned relaxation of the measurement of the second candidate cell may also include shortening the duration of the predefined time period. For example, after the measurement of the second candidate cell is relaxed, the duration of the TTT associated with the second candidate cell is less than the original TTT associated with the second candidate cell, wherein the original TTT is the TTT before the measurement of the second candidate cell is relaxed.
  • conditions of the second candidate cell may include, for example, one or more of event A3, event A4 and event A5.
  • the conditions of the second candidate cell may also include other conditions, which is not limited in the embodiment of the present application.
  • CHO candidate cell 1 is associated with CPAC candidate cell 1. If CHO candidate cell 1 meets the entering condition, then CHO candidate cell 1 needs to be continuously measured in TTT1 corresponding to CHO candidate cell 1 to determine whether CHO candidate cell 1 meets the condition in TTT1. Only when CHO candidate cell 1 meets the condition in TTT1 can CHO candidate cell 1 be considered to meet the condition. Similarly, if CPAC candidate cell 1 meets the entering condition, then CPAC candidate cell 1 needs to be continuously measured in TTT2 corresponding to CPAC candidate cell 1 to determine whether CPAC candidate cell 1 meets the condition in TTT2. Only when CPAC candidate cell 1 meets the condition in TTT2 can CPAC candidate cell 1 be considered to meet the condition.
  • CHO candidate cell 1 meets the access condition at time 1, and also meets the condition within TTT1 corresponding to CHO candidate cell 1.
  • CPAC candidate cell 1 meets the access condition at time 2, but does not meet the condition within TTT2 corresponding to CPAC candidate cell 1.
  • the solution of the embodiment of the present application can be adopted to relax the condition of CPAC candidate cell 1, and it is considered that the condition of CHO candidate cell 1 and the condition of CPAC candidate cell 1 are met at the same time. Accordingly, the terminal device can access CHO candidate cell 1 and CPAC candidate cell 1.
  • the terminal device may evaluate the second candidate cell. If the second candidate cell meets the access conditions, it is considered that the conditions of the second candidate cell are met.
  • condition of the second candidate cell may be associated with a threshold. Accordingly, the above target condition (or the relaxed condition of the second candidate cell) may include reducing the threshold.
  • the condition of the second candidate cell includes that the measurement result of the second candidate cell is greater than the threshold value 1, and the condition of the second candidate cell is met. Accordingly, in the embodiment of the present application, the target condition is used to indicate that the measurement result of the second candidate cell is greater than the threshold value 2, and the condition of the second candidate cell is met, wherein the threshold value 1 is greater than the threshold value 2.
  • the conditions of the second candidate cell can also be relaxed in other ways.
  • the conditions of the second candidate cell can be relaxed by adjusting the measurement result of the second candidate cell.
  • the condition of the second candidate cell includes that the difference between the measurement result of the second candidate cell and the preset parameter 1 is greater than the threshold value, and the condition of the second candidate cell is met.
  • the target condition is used to indicate that the measurement result of the second candidate cell and the preset parameter 2 are greater than the threshold value, and the condition of the second candidate cell is met, wherein the preset parameter 1 is greater than the preset parameter 2.
  • the adjustment method of the preset parameters is not limited.
  • the conditions of the second candidate cell can also be relaxed by increasing the preset parameters. For example, if the conditions of the second candidate cell include event A3 (CondEvent A3), the conditions of the second candidate cell can be relaxed by increasing the preset parameters.
  • the first time in the embodiment of the present application is described above by taking the first time determined based on the time when the condition of the second candidate cell is met as an example.
  • the first time may be independent of the time when the condition of the second candidate cell is met.
  • the first time may be associated with a first timer.
  • the stop time of the first timer may be the first time, or the first time may be a certain time after the first timer stops.
  • the first timer is used to indicate the duration for evaluating the candidate cell, that is, during the operation of the first timer, the terminal device can evaluate the candidate cell.
  • the candidate cells are not limited.
  • the candidate cells may include one or more of the following: a first candidate cell, a second candidate cell, and other candidate cells.
  • other candidate cells can be understood as other candidate cells other than the first candidate cell among the multiple CHO candidate cells of the terminal device.
  • other candidate cells may also include one or more CPAC candidate cells associated with other candidate cells.
  • the start condition or restart condition of the first timer is not limited.
  • the start condition or restart condition of the first timer includes that the condition of the first candidate cell is satisfied, that is, in response to satisfying the condition of the first candidate cell, The terminal device starts or restarts the first timer.
  • the restart condition of the first timer includes that the condition of the third candidate cell is met during the operation of the first timer, wherein the third candidate cell is other CHO-based candidate cells (also referred to as "other CHO candidate cells") other than the first candidate cell.
  • the terminal device in response to meeting the conditions of CHO candidate cell 1, the terminal device starts a first timer and evaluates other candidate cells during the operation of the first timer. At this time, if the conditions of CHO candidate cell 2 are met, the terminal device can restart the first timer.
  • the stop condition of the first timer is not limited.
  • the stop condition of the first timer includes one or more of the following: the condition of the second candidate cell is met; the measurement result of the source cell of the terminal device is lower than the threshold; the source cell of the terminal device has a radio link failure (RLF); and the timer related to RLF is started.
  • RLF radio link failure
  • the terminal device does not need to evaluate the CHO candidate cell (for example, including the first candidate cell) and/or the CPAC candidate cell (for example, including the second candidate cell), and the first timer can be stopped at this time.
  • the satisfaction of the condition of the second candidate cell may include satisfying the condition of the second candidate cell after relaxation, or satisfying the condition of the second candidate cell before relaxation.
  • the terminal device can stop the first timer and access the first candidate cell as soon as possible so that the terminal device can continue to communicate with the network device.
  • the measurement result of the source cell may only be temporarily lower than the threshold. If the terminal device immediately stops the first timer and switches to the first candidate cell once it is monitored that the measurement result of the source cell is lower than the threshold, it may cause the terminal device to switch frequently and waste resources. Therefore, in some implementations, the stop condition of the first timer may include that the measurement result of the source cell is lower than the threshold within the first time period, or that the measurement result of the source cell is continuously lower than the threshold within the first time period.
  • the first time period may be a predefined duration, for example, the first time period may be controlled based on a timer.
  • the above measurement results are not limited.
  • the measurement results may include the signal quality of the source cell, and accordingly, the threshold may be a signal quality threshold, wherein the signal quality may be, for example, a reference signal receiving quality (RSRQ).
  • the measurement results may include the signal receiving power of the source cell, and accordingly, the threshold may be a signal receiving power threshold, wherein the reference signal receiving power (RSRP).
  • RSRP reference signal receiving power
  • the terminal device can stop the first timer and access the first candidate cell as soon as possible so that the terminal device can continue to communicate with the network device.
  • the stop condition of the first timer includes the start of a timer related to RLF
  • the terminal device starts a timer related to RLF
  • the terminal device may not be able to communicate with the network device through the source cell.
  • the terminal device can stop the first timer and access the first candidate cell as soon as possible so that the terminal device can continue to communicate with the network device.
  • the above-mentioned timer related to RLF may include a timer for indicating that the terminal device fails to monitor the radio link, for example, timer 310 (T310).
  • T310 timer 310
  • the terminal device monitors the physical layer of the primary service cell and there is a problem (for example, when N310 out-of-sync indications are received consecutively), the timer is started.
  • the stop condition of the first timer may also include other conditions.
  • the first candidate cell may be associated with one or more CPAC candidate cells (including the second candidate cell).
  • the stop condition of the first timer may include that one or more CPAC candidate cells associated with the first candidate cell meet the conditions.
  • the stop condition of the first timer may also include that the terminal device obtains multiple consecutive out-of-sync indications, for example, receiving N310 out-of-sync indications consecutively.
  • accessing the first candidate cell at the first time includes accessing only the first candidate cell at the first time.
  • the terminal device can only access the first candidate cell (i.e., perform CHO-only).
  • accessing the first candidate cell at the first time may include accessing the first candidate cell and the second candidate cell at the first time. In other words, if the first timer stops, the terminal device can access the first candidate cell and the second candidate cell.
  • whether the terminal device only accesses the first candidate cell, or accesses the first candidate cell and the second candidate cell can be determined based on the stop condition of the first timer.
  • the stop condition of the first timer is that the condition of the second candidate cell is met, then after the first timer stops, the terminal device can access the first candidate cell and the second candidate cell.
  • the terminal device can only access the first candidate cell.
  • the stop condition of the first timer when the condition of the second candidate cell is not met, the stop condition of the first timer may, for example, include the occurrence of RLF in the source cell, or the stop condition of the first timer may, for example, include the start of a timer related to RLF.
  • the terminal device can only access the first candidate cell.
  • the method further includes: if the first timer times out, the terminal device may perform CHO-only configuration and/or release the SCG, wherein the SCG may be the current serving SCG. For example, if during the operation of the first timer, the condition of the CPAC candidate cell associated with the first candidate cell is not met, then after the first timer times out, the terminal device may switch only to the first candidate cell based on the CHO-only configuration. For another example, if during the operation of the first timer, the condition of the CPAC candidate cell associated with the first candidate cell is not met, then after the first timer times out, the terminal device may switch only to the first candidate cell based on the CHO-only configuration and release the current serving SCG.
  • the granularity of the first timer is not limited.
  • the first timer may be associated with each CHO candidate cell (e.g., including the first candidate cell).
  • the first timer may be configured and/or maintained for each CHO candidate cell.
  • the first timer may be associated with multiple CHO candidate cells (e.g., including the first candidate cell).
  • the first timer may be configured and/or maintained for multiple CHO candidate cells, where the multiple CHO candidate cells may include, for example, some or all of the CHO candidate cells in the CHO candidate cell list.
  • the granularity of the first timer can be used in combination with the start/restart condition of the first timer.
  • each of the multiple CHO candidate cells is associated with a first timer. If the condition of a certain CHO candidate cell is met, the first timer associated with the CHO candidate cell can be started.
  • multiple CHO candidate cells are associated with a first timer. If the condition of a certain CHO candidate cell is met, the first timer can be started. If the condition of another CHO candidate cell is met, the first timer can be restarted.
  • the terminal device may stop evaluating other CHO candidate cells, which helps reduce the power consumption required for the terminal device to perform the evaluation.
  • evaluating other CHO candidate cells may include evaluating whether the conditional switching events associated with other CHO candidate cells are met, or in other words, evaluating other CHO candidate cells may include the terminal device performing a switching condition evaluation task associated with the CHO candidate cells.
  • the other CHO candidate cells are other CHO candidate cells other than the first candidate cell among the multiple CHO candidate cells of the terminal device.
  • evaluating the CPAC candidate cell may include evaluating whether the CPAC condition associated with the CPAC candidate cell is met, or in other words, evaluating the CPAC candidate cell may include the terminal device performing a CPAC condition evaluation task associated with the CPAC candidate cell.
  • the terminal device may only perform CHO for the first candidate cell.
  • the terminal device may determine whether to only perform CHO for the first candidate cell based on the channel quality of the current serving cell (e.g., serving Pcell). For example, the terminal device may monitor the channel quality of the serving Pcell. If the channel quality of the serving Pcell is lower than or equal to a preset threshold, the terminal device only performs CHO for the first candidate cell. On the contrary, if the channel quality of the serving Pcell is higher than the preset threshold, the terminal device cannot only perform CHO for the first candidate cell.
  • the terminal device may release the serving SCG.
  • the terminal device may retain the serving SCG.
  • the first operation includes the terminal device accessing the first candidate cell.
  • the terminal device can access the first candidate cell.
  • whether the first operation includes accessing the second candidate cell is not limited.
  • the first operation may only include accessing the first candidate cell, at this time, the terminal device can only access the first candidate cell.
  • the first operation may include accessing the first candidate cell and accessing the second candidate cell, at this time, the terminal device can access the first candidate cell and the second candidate cell.
  • the terminal device may stop evaluating other CHO candidate cells, which helps reduce the power consumption required for the terminal device to perform the evaluation.
  • evaluating other CHO candidate cells may include evaluating whether the conditional switching events associated with other CHO candidate cells are met, or in other words, evaluating other CHO candidate cells may include the terminal device performing a switching condition evaluation task associated with the CHO candidate cells.
  • the other CHO candidate cells are other CHO candidate cells other than the first candidate cell among the multiple CHO candidate cells of the terminal device.
  • the terminal device may stop evaluating the CPAC candidate cell associated with the first candidate cell, which helps to reduce the power consumption required for the terminal device to perform the evaluation.
  • evaluating the CPAC candidate cell may include evaluating whether the CPAC condition associated with the CPAC candidate cell is met, or in other words, evaluating the CPAC candidate cell may include the terminal device performing a CPAC condition evaluation task associated with the CPAC candidate cell.
  • the terminal device may only perform CHO for the first candidate cell.
  • the terminal device may determine whether to only perform CHO for the first candidate cell based on the channel quality of the current serving cell (e.g., serving Pcell). For example, the terminal device may monitor the channel quality of the serving Pcell. If the channel quality of the serving Pcell is lower than or equal to a preset threshold, the terminal device only performs CHO for the first candidate cell. On the contrary, if the channel quality of the serving Pcell is higher than the preset threshold, the terminal device cannot only perform CHO for the first candidate cell.
  • the terminal device may release the serving SCG.
  • the terminal device may retain the serving SCG.
  • the first operation may include the terminal device releasing or reserving the service SCG.
  • the protocol does not specify the handling method of the terminal device regarding the service SCG in the above scenario 1. If it is stipulated that when the conditions of the first candidate cell are met and the conditions of the second candidate cell are not met, it is actually unnecessary for the terminal device to release the service SCG, which reduces the possibility of the terminal device communicating based on the SCG.
  • the service SCG may be associated with the first candidate cell, for example, the service SCG belongs to the candidate SCG list associated with the first candidate cell.
  • the terminal device can retain the service SCG. That is to say, if the first operation includes retaining the service SCG, the service SCG belongs to the candidate SCG list, wherein retaining the service SCG can be understood as retaining the configuration of the service SCG, and/or retaining the connection of the service SCG.
  • the terminal device can release the service SCG.
  • the service SCG can be set to an activated state or an inactivated state. In some implementations, if the conditions of the service SCG are not met, the terminal device sets the service SCG to a deactivated state. In other implementations, if the conditions of the service SCG are met, the terminal device sets the service SCG to an activated state.
  • the conditions for serving the SCG are not limited.
  • the conditions for serving the SCG are used to perform CPAC for the serving SCG, or the conditions for serving the SCG may include an add/change condition associated with the serving SCG, wherein the conditions for serving the SCG may be associated with the channel quality of the serving SCG.
  • the conditions for serving the SCG may include Event A4 for performing CPAC for the serving SCG.
  • the terminal device can determine to retain the service SCG or release the service SCG based on the signal quality of the service SCG. In some implementations, if the conditions of the service SCG are not met and the signal quality of the service SCG is poor (for example, the signal quality of the service SCG is lower than a threshold), the terminal device can release the service SCG. In other implementations, if the conditions of the service SCG are not met, but the signal quality of the service SCG is good (for example, the signal quality of the service SCG is higher than a threshold), the terminal device can retain the service SCG.
  • the conditions for the service SCG are not limited.
  • the conditions for the service SCG are used to execute CPAC for the service SCG, or the conditions for the service SCG may include add/change conditions associated with the service SCG.
  • the conditions for the service SCG may include event A3 (Event A3) or event A5 (Event A5) for executing CPAC for the service SCG.
  • the conditions for the service SCG may be associated with the service SCG measurement configuration.
  • the terminal device can determine whether the measurement result of service SCG1 meets the RSRP threshold. If the measurement result of service SCG1 meets the RSRP threshold, the terminal device performs CHO access to the CHO candidate cell and maintains connection with service SCG1.
  • the terminal device can update the configuration of security keys and/or bearers (e.g., SRB3) based on the candidate cell configuration.
  • security keys and/or bearers e.g., SRB3
  • the first operation includes evaluating the second candidate cell or stopping evaluating the second candidate cell.
  • the embodiment of the present application also provides a judgment method, which is introduced below in combination with Examples 1 to 3.
  • Example 1 The terminal device may determine to evaluate or stop evaluating the second candidate cell based on the first information, or the first information is used to instruct the terminal device to evaluate or stop evaluating the second candidate cell.
  • the first information may be referred to as "first indication information”.
  • the terminal device may be instructed to evaluate or stop evaluating the second candidate cell by displaying signaling through the first information.
  • the carrying method of the first information is not limited.
  • the first information can be carried in the configuration information of the first candidate cell.
  • the first information can also be information transmitted separately.
  • the terminal device may stop evaluating the CPAC candidate cell. At this time, the terminal device may retain the conditions of the CPAC candidate cell so that the CPAC candidate cell can be evaluated next time to reduce the transmission overhead required to transmit the conditions of the CPAC candidate cell.
  • the terminal device may release the configuration of the CPAC candidate cell.
  • the configuration of the CPAC candidate cell may, for example, include the execution condition configuration of the CPAC candidate cell, and/or the configuration of the CPAC candidate cell may, for example, include the candidate cell configuration of the CPAC candidate cell.
  • the terminal device if it stops evaluating the CPAC candidate cell, it can restart the evaluation of the CPAC candidate cell based on the indication of the indication information.
  • the indication information can be, for example, a message (e.g., an RRC message) for updating/configuring the CPAC evaluation condition.
  • the first information is used to indicate that the second candidate cell is to be evaluated. Accordingly, when the terminal device applies the configuration of the CHO candidate cell 1 , the CPAC candidate cell associated with the CHO candidate cell 1 may be evaluated based on the addition/change conditions included in the configuration of the CHO candidate cell 1 .
  • CHO candidate cell 1 includes the first information
  • the first information is used to indicate to stop evaluating the second candidate cell. Accordingly, when the terminal device applies the configuration of CHO candidate cell 1, it stops evaluating the CPAC candidate cell associated with CHO candidate cell 1. Afterwards, if the terminal device receives an RRC message sent by CHO candidate cell 1 for updating/configuring the CPAC evaluation condition, it can restart the evaluation of the CPAC candidate cell.
  • the first information is also used to determine whether to release or retain the CPAC configuration of the second candidate cell.
  • the information used to determine whether to release or retain the CPAC configuration of the second candidate cell may also be other information in addition to the first information.
  • the method for determining whether to release or retain the CPAC configuration of the second candidate cell based on the first information is not limited. For example, if the first information exists, it can be determined to retain the CPAC configuration of the second candidate cell. For another example, if the first information does not exist, it can be determined to release the CPAC configuration of the second candidate cell. For another example, the first information can be used to indicate the release or retention of the CPAC configuration of the second candidate cell.
  • CHO candidate cell 1 includes the first information
  • the first information is used to indicate to stop evaluating the CPAC candidate cell associated with CHO candidate cell 1. Accordingly, when the terminal device applies the configuration of CHO candidate cell 1, the configuration of the CPAC candidate cell associated with CHO candidate cell 1 can be retained (for example, the execution condition configuration related to the CPAC candidate cell in the first UE variable, and/or, the CPAC candidate cell configuration in the second UE variable).
  • the terminal device applies the configuration of CHO candidate cell 1 and releases the CPAC configuration (for example, the execution condition configuration related to the CPAC candidate cell in the first UE variable, and/or the CPAC candidate cell configuration in the second UE variable).
  • Example 2 The terminal device can determine to evaluate or stop evaluating the second candidate cell based on the first information, wherein the first information is used to determine the validity of the conditions of the CPAC candidate cell associated with the first candidate cell (including the conditions of the second candidate cell).
  • the validity of the above-mentioned CPAC candidate cell conditions can be determined based on the node that configures the CPAC candidate cell conditions. That is, the first information is used to indicate the node that configures the CPAC candidate cell conditions, and the node includes one or more of the source MN, the source SN, the candidate MN, and the candidate SN.
  • the terminal device stops evaluating the CPAC candidate cell. That is, when the conditions of the CPAC candidate cell are configured by the source MN, if the terminal device switches to the first candidate cell (i.e., after a primary cell change occurs), the conditions of the CPAC candidate cell become invalid, and the terminal device can stop evaluating the CPAC candidate cell.
  • the conditions of the CPAC candidate cells are configured by the source MN, the conditions of the CPAC candidate cells are associated with the MCG measurement configuration (MCG measurement configuration).
  • the terminal device evaluates the CPAC candidate cell. That is, when the conditions of the CPAC candidate cell are configured by the candidate MN, if the terminal device switches to the candidate MN, the conditions of the CPAC candidate cell are valid, and the terminal device can continue to evaluate the CPAC candidate cell.
  • the terminal device evaluates the CPAC candidate cell. That is, when the conditions of the CPAC candidate cell are configured by the source SN, if the terminal device switches to the candidate MN and retains the source SN, the conditions of the CPAC candidate cell are valid, and the terminal device can continue to evaluate the CPAC candidate cell.
  • the terminal device stops evaluating the CPAC candidate cell.
  • the conditions of the CPAC candidate cell are configured by the source SN, if the terminal device switches to the candidate MN and releases the source SN, the conditions of the CPAC candidate cell are invalid, and the terminal device can stop evaluating the CPAC candidate cell.
  • the terminal device evaluates the CPAC candidate cell. That is, when the conditions of the CPAC candidate cell are configured by the candidate SN, if the terminal device switches to the candidate SN, the conditions of the CPAC candidate cell are valid, and the terminal device can continue to evaluate the CPAC candidate cell.
  • Example 3 The terminal device can determine to evaluate or stop evaluating the second candidate cell based on the first information, wherein the first information is used to indicate a node that triggers CPAC based on the second candidate cell, and the node includes one or more of a source MN, a source SN, and a candidate MN.
  • the terminal device stops evaluating the CPAC candidate cells. That is, when CPAC is triggered by the source MN, if the terminal device switches to the first candidate cell (i.e., after a primary cell change occurs), the terminal device can stop evaluating the CPAC candidate cells.
  • the terminal device evaluates the CPAC candidate cell. That is, when CPAC is triggered by a candidate MN, if the terminal device switches to the candidate MN, the terminal device can continue to evaluate the CPAC candidate cell. Otherwise, the terminal device stops evaluating the CPAC candidate cell.
  • the terminal device evaluates the CPAC candidate cell. That is, when the CPAC is configured by the source SN, if the terminal device switches to the candidate MN and retains the source SN, the terminal device can continue to evaluate the CPAC candidate cell. Otherwise, the terminal device stops evaluating the CPAC candidate cell.
  • the terminal device stops evaluating the CPAC candidate cells. That is, when CPAC is triggered by the source SN, if the terminal device switches to the candidate MN and releases the source SN, the terminal device can stop evaluating the CPAC candidate cells.
  • the above-mentioned terminal device may stop evaluating the CPAC candidate cells, which may include the terminal device stopping the evaluation of the CPAC candidate cells until new CPAC execution conditions are determined, or in other words, not performing the evaluation of the CPCA candidate cells before the new CPAC execution conditions are determined.
  • the terminal device can retain the conditions of the CPAC candidate cell so as to evaluate the CPAC candidate cell next time, so as to reduce the transmission overhead required to transmit the conditions of the CPAC candidate cell.
  • the terminal device can discard the conditions of the CPAC candidate cell.
  • the terminal device if it stops evaluating the CPAC candidate cell, it can restart the evaluation of the CPAC candidate cell based on the indication of the indication information.
  • the indication information can be, for example, a message (e.g., an RRC message) for updating/configuring the CPAC evaluation condition.
  • the terminal device may not perform an evaluation of the CPAC candidate cells before determining new CPAC execution conditions, wherein the new CPAC execution conditions may include configuring new evaluation conditions for the candidate SCG or the target for the terminal device.
  • the terminal device may release the CPAC configuration.
  • the terminal device may retain the CPAC configuration.
  • the first operation includes evaluating the first candidate cell or stopping evaluating the first candidate cell.
  • the embodiment of the present application also provides a judgment method.
  • the terminal device may determine to evaluate or stop evaluating the first candidate cell based on the first information, or in other words, the first information is used to instruct the terminal device to evaluate or stop evaluating the first candidate cell, and the first information may be referred to as "first indication information". In other words, the terminal device may be instructed to evaluate or stop evaluating the first candidate cell by displaying signaling through the first information.
  • the carrying method of the first information is not limited.
  • the first information can be carried in the configuration information of the first candidate cell.
  • the first information can also be information transmitted separately.
  • the above-mentioned first candidate cell belongs to the CHO candidate cell. Accordingly, evaluating the first candidate cell can be replaced by evaluating the CHO candidate cell, and stopping evaluating the first candidate cell can be replaced by stopping evaluating the CHO candidate cell.
  • the first operation includes staying in the source cell.
  • the signal quality of the source cell may be good, for example, the signal quality of the source cell is higher than the threshold.
  • the terminal device can perform the above-mentioned first operation, that is, stay in the source cell to avoid unnecessary switching.
  • the signal quality of the first candidate cell may be poor, for example, the signal quality of the first candidate cell is lower than a threshold.
  • the terminal device may perform the above-mentioned first operation, that is, stay in the source cell to avoid unnecessary switching.
  • the execution time of the first operation may be determined based on the third timer.
  • the first operation is executed after the third timer stops.
  • the execution time of the first operation may be the stop time of the third timer.
  • the stop condition of the third timer may be associated with the signal quality of the first candidate cell and/or the signal quality of the source cell. Taking the signal quality of the first candidate cell as an example, the stop condition may include that the signal quality of the first candidate cell is lower than a threshold. Taking the signal quality of the source cell as an example, the stop condition may include that the signal quality of the source cell is higher than a threshold.
  • the stop condition in order to improve the accuracy of executing the first operation, may be based on the signal quality of the first candidate cell and the signal quality of the source cell.
  • the stop condition may include that the signal quality of the first candidate cell is lower than the first threshold, and the stop condition may include that the signal quality of the source cell is higher than the second threshold.
  • the first threshold and the second threshold may be the same threshold, The thresholds may also be different, and the embodiments of the present application do not limit this.
  • the start condition of the third timer may be the same as the start condition of the first timer.
  • the start condition or restart condition of the third timer includes that the condition of the first candidate cell is satisfied, that is, in response to satisfying the condition of the first candidate cell, the terminal device starts or restarts the third timer.
  • the restart condition of the first timer includes that a condition of a third candidate cell is satisfied during the operation of the third timer, wherein the third candidate cell is other CHO-based candidate cells other than the first candidate cell (also referred to as "other CHO candidate cells").
  • the number of the third candidate cells is not limited, and the third candidate cell may include one or more CHO candidate cells.
  • the terminal device in response to the condition of CHO candidate cell 1 being met, the terminal device starts a third timer and evaluates other CHO candidate cells during the operation of the third timer. At this time, if the condition of CHO candidate cell 2 is met, the terminal device can restart the third timer.
  • embodiment 3 can be used in combination with embodiment 1. Based on the introduction of embodiment 3, if the terminal device releases the SCG, the terminal device can determine the timing of accessing the first candidate cell based on the solution of embodiment 1.
  • Scenario 2 If the time when the condition of the second candidate cell is satisfied is different from the time when the condition of the first candidate cell is satisfied, for ease of description, the time when the condition of the second candidate cell is satisfied is referred to as "time 1", and the time when the condition of the first candidate cell is satisfied is referred to as "time 2".
  • time 1 and time 2 are not limited.
  • time 1 may be earlier than time 2, that is, before the condition of the first candidate cell is met, the condition of the second candidate cell has been met.
  • time 1 may be later than time 2, that is, before the condition of the second candidate cell is met, the condition of the first candidate cell has been met.
  • the related introduction of the first candidate cell, the second candidate cell, the relationship between the first candidate cell and the second candidate cell, the conditions of the first candidate cell, the conditions of the second candidate cell, etc. please refer to the related introduction in the above scenario 1.
  • the corresponding introductions using the same terms are similar. For the sake of brevity, they will not be repeated here.
  • the terminal device accesses the first candidate cell at a second time, wherein the second time may be determined based on the time (ie, time 2) when the condition of the first candidate cell is met.
  • the second time is determined based on time 2, which can be understood as follows: the second time can be a period of time after time 2, or the second time can be equal to time 2.
  • the time when the terminal device accesses the first candidate cell can be later than the time when the condition of the first candidate cell is met, or the time when the terminal device accesses the first candidate cell can be set at the time when the condition of the first candidate cell is met.
  • the terminal device accesses the first candidate cell at the second time, which can be replaced by the terminal device accessing the first candidate cell in response to the condition of the first candidate cell being met. Taking time 1 as an example, when the condition of the second candidate cell is met, the terminal device accesses the first candidate cell in response to the condition of the first candidate cell being met.
  • the above-mentioned conditions for satisfying the first candidate cell are not limited.
  • the above-mentioned conditions for satisfying the first candidate cell can be understood as, after the conditions of the first candidate cell are relaxed, the conditions of the first candidate cell are satisfied, or, in other words, the conditions of the first candidate cell after relaxation are satisfied, or, after the measurement of the first candidate cell is relaxed, the conditions of the first candidate cell are satisfied.
  • the time for satisfying the conditions of the first candidate cell can be determined based on the time corresponding to the satisfaction of the conditions of the first candidate cell after relaxation. In other words, in response to the satisfaction of the conditions of the first candidate cell after relaxation, the terminal device accesses the first candidate cell.
  • the terminal device typically monitors the channel conditions of the first candidate cell to determine whether the conditions of the first candidate cell are met, and only if the conditions are met within a predefined time period (for example, the trigger time TTT), the terminal device can access the first candidate cell.
  • a predefined time period for example, the trigger time TTT
  • the measurement of the first candidate cell is relaxed, which may include skipping the measurement of the channel conditions of the first candidate cell in the predefined time period, or in other words, there is no need to measure the channel conditions of the first candidate cell in the predefined time period, or in other words, the duration of the above-mentioned predefined time period is adjusted to 0.
  • the above-mentioned relaxation of the measurement of the first candidate cell may also include shortening the duration of the predefined time period. For example, after the measurement of the first candidate cell is relaxed, the duration of the TTT associated with the first candidate cell is less than the original TTT associated with the first candidate cell, wherein the original TTT is the TTT before the measurement of the first candidate cell is relaxed.
  • CHO candidate cell 1 is associated with CPAC candidate cell 1. If CHO candidate cell 1 meets the entering condition, CHO candidate cell 1 needs to be continuously measured within TTT3 corresponding to CHO candidate cell 1 to determine whether CHO candidate cell 1 meets the condition within TTT3. Only when CHO candidate cell 1 meets the condition within TTT3 can it be considered that CHO candidate cell 1 meets the condition.
  • the conditions for the CHO candidate cell 1 can be relaxed.
  • the CHO candidate cell 1 meets the access conditions, there is no need to determine whether the conditions for the CHO candidate cell 1 are met within TTT3, that is, the conditions for the CHO candidate cell 1 can be directly accessed.
  • the terminal device may evaluate the first candidate cell. If the first candidate cell meets the access conditions, it is considered that the conditions of the first candidate cell are met.
  • condition of the first candidate cell may be associated with a threshold. Accordingly, the relaxed condition of the first candidate cell may include reducing the threshold.
  • the condition of the first candidate cell includes that the measurement result of the first candidate cell is greater than the threshold value 1, and the condition of the first candidate cell is met. Accordingly, in the embodiment of the present application, the relaxed condition of the first candidate cell is used to indicate that the measurement result of the first candidate cell is greater than the threshold value 2, and the condition of the first candidate cell is met, wherein the threshold value 1 is greater than the threshold value 2.
  • the conditions of the first candidate cell can also be relaxed in other ways.
  • the conditions of the first candidate cell can be relaxed by adjusting the measurement result of the first candidate cell.
  • the condition of the first candidate cell includes that the difference between the measurement result of the first candidate cell and the preset parameter 1 is greater than the threshold value, and the condition of the first candidate cell is met.
  • the relaxed condition of the first candidate cell is used to indicate that the measurement result of the first candidate cell and the preset parameter 2 are greater than the threshold value, and the condition of the first candidate cell is met, wherein the preset parameter 1 is greater than the preset parameter 2.
  • the adjustment method of the preset parameters is not limited.
  • the conditions of the first candidate cell can also be relaxed by increasing the preset parameters. For example, if the conditions of the first candidate cell include event A3 (CondEvent A3), the conditions of the first candidate cell can be relaxed by increasing the preset parameters.
  • the terminal device when the terminal device accesses the first candidate cell, it can also access the second candidate cell, that is, perform CHO for the first candidate cell and CPAC for the second candidate cell. Of course, the terminal device may not access the second candidate cell.
  • the second time is associated with a second timer.
  • the stop time of the second timer may be the second time, or the second time may be a certain time after the second timer stops.
  • the second timer is used to indicate the duration for evaluating the first candidate cell, that is, during the operation of the second timer, the first candidate cell can be evaluated based on the relaxed conditions of the first candidate cell.
  • the start condition of the second timer is not limited. In some implementations, the start condition of the second timer includes one or more of the following: the condition of the first candidate cell is met; the condition of the second candidate cell is met; the condition of the fifth candidate cell associated with the first candidate cell is not met; the condition of the fourth candidate cell associated with the second candidate cell is not met.
  • the terminal device starts the second timer.
  • the terminal device starts the second timer.
  • the fifth candidate cell may include the second candidate cell. That is, in response to not satisfying the condition of the fifth candidate cell, the terminal device starts the second timer.
  • the fifth candidate cells may include one or more CPAC candidate cells.
  • the fourth candidate cell may include the first candidate cell. That is, in response to the condition of the fourth candidate cell not being satisfied, the terminal device starts the second timer.
  • the number of fourth candidate cells is not limited, and the fourth candidate cells may include one or more CHO candidate cells.
  • the stop condition of the second timer is not limited.
  • the stop condition of the second timer includes that the condition of the first candidate cell is satisfied and/or the condition of the second candidate cell is satisfied.
  • the stop condition of the second timer may include that the first candidate cell satisfies the condition, and the second candidate cell associated with the first candidate cell satisfies the condition.
  • the method further includes: the terminal device performs one or more of the following operations: the terminal device performs CHO for the first candidate cell; re-evaluates the candidate cells of the terminal device; performs CHO and CPAC for the target candidate cell and other candidate cells associated with the target candidate cell; performs CHO and CPAC for the target candidate cell and other candidate cells associated with the target candidate cell, and the conditions for CPAC corresponding to the target candidate cell are met.
  • the terminal device may only execute CHO for the first candidate cell.
  • the candidate cells may include CHO candidate cells and/or CPAC candidate cells, wherein the CHO candidate cells may include the first candidate cells, and the CPAC candidate cells may include the second candidate cells.
  • evaluating the candidate cell may include evaluating whether the conditional switching event and/or CPAC condition associated with the candidate cell is met, or in other words, evaluating the candidate cell may include the terminal device executing the conditional switching event evaluation task associated with the candidate cell and/or the CPAC condition evaluation task associated with the candidate cell.
  • the terminal device may select a CHO candidate cell that satisfies the condition, and perform CHO and CPAC on the CHO candidate cell and the CPAC candidate cell associated with the CHO candidate cell.
  • the manner in which the terminal device selects a CHO candidate cell that meets the conditions is not limited.
  • the terminal device may select a CHO candidate cell that meets the conditions based on a preset rule, wherein the preset rule is used to indicate the selection of a CHO candidate cell with the best signal quality, which helps to improve the communication quality between the terminal device and the network device.
  • the terminal device may randomly select a CHO candidate cell that meets the conditions to simplify the complexity of the terminal device selecting a CHO candidate cell that meets the conditions.
  • the terminal device can select a CPAC candidate cell that satisfies the condition, and perform CHO and CPAC for the CPAC candidate cell and the CHO candidate cell associated with the CPAC candidate cell.
  • the manner in which the terminal device selects a CPAC candidate cell that meets the conditions is not limited.
  • the terminal device can select a CPAC candidate cell that meets the conditions based on a preset rule, where the preset rule is used to indicate the selection of a CPAC candidate cell with the best signal quality, which helps to improve the communication quality between the terminal device and the network device.
  • the terminal device can randomly select a CPAC candidate cell that meets the conditions to simplify the complexity of the terminal device selecting a CPAC candidate cell that meets the conditions.
  • evaluating the first candidate cell may include evaluating whether the conditional switching event associated with the first candidate cell is met, or in other words, evaluating the first candidate cell may include the terminal device performing a conditional switching event evaluation task associated with the first candidate cell.
  • evaluating the second candidate cell may include evaluating whether the CPAC condition associated with the second candidate cell is satisfied, or in other words, evaluating the second candidate cell may include the terminal device executing a CPAC condition evaluation task associated with the second candidate cell.
  • the above-mentioned CHO candidate cells may include a first candidate cell, and the above-mentioned CHO candidate cells may be other CHO candidate cells among the CHO candidate cells of the terminal device except the first candidate cell.
  • the above-mentioned CPAC candidate cell may include a second candidate cell, and the above-mentioned CPAC candidate cell may be other CPAC candidate cells among the CPAC candidate cells of the terminal device except the second candidate cell.
  • FIG5 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 500 shown in FIG5 includes a processing unit 510 .
  • the processing unit 510 is used to perform a first operation; wherein the first candidate cell is a conditional switching CHO candidate cell, the second candidate cell is a conditional primary and secondary cell addition/change CPAC candidate cell, and the first candidate cell is associated with the second candidate cell; wherein the first operation includes one or more of the following: accessing the first candidate cell at the first time; accessing the first candidate cell; releasing or retaining the service secondary cell group SCG; evaluating the second candidate cell; stopping evaluating the second candidate cell; evaluating the first candidate cell; stopping evaluating the first candidate cell; and staying in the source cell.
  • the first time is determined based on the time when the condition of the second candidate cell is met; or the first time is independent of the time when the condition of the second candidate cell is met.
  • the time when the condition of the second candidate cell is met is determined based on the time when the target condition of the second candidate cell is met, and the target condition is obtained by relaxing the condition of the second candidate cell.
  • the first operation includes accessing the first candidate cell at the first time
  • the first time is associated with a first timer
  • the first timer is used to indicate a duration for evaluating the second candidate cell.
  • the start condition of the first timer includes that a condition of the first candidate cell is satisfied.
  • the restart condition of the first timer includes that a condition of a third candidate cell is satisfied during the running of the first timer, and the third candidate cell is another CHO-based candidate cell except the first candidate cell.
  • the stop condition of the first timer includes one or more of the following: the condition of the second candidate cell is met; the measurement result of the source cell of the terminal device is lower than the threshold; a radio link failure RLF occurs in the source cell of the terminal device; and a timer related to RLF is started.
  • accessing the first candidate cell at the first time includes accessing only the first candidate cell at the first time.
  • the processing unit is further used to: release the SCG if the first timer times out.
  • the service SCG belongs to a candidate SCG list.
  • condition of the service SCG is used to execute CPC based on the service SCG
  • processing unit is further used to: if the condition of the service SCG is not met, set the service SCG to a deactivated state; and/or if the condition of the service SCG is met, set the service SCG to an activated state.
  • the service SCG does not belong to the candidate SCG list.
  • the processing unit is further used to: determine to evaluate the second candidate cell or stop evaluating the second candidate cell based on the first information.
  • the first information is used to instruct to evaluate the second candidate cell or to stop evaluating the second candidate cell.
  • the first information is also used to determine whether to release or retain the CPAC configuration of the second candidate cell.
  • the first information is used to indicate a node that configures the condition of the second candidate cell, and the node includes one or more of a source MN, a source SN, a candidate MN, and a candidate SN.
  • the terminal device stops evaluating the second candidate cell; and/or if the first information indicates that the node is the candidate MN and the terminal device switches to the candidate MN, the terminal device evaluates the second candidate cell; and/or if the first information indicates that the node is the source SN and the terminal device switches to the first candidate cell and retains the source SN, the terminal device evaluates the second candidate cell; and/or if the first information indicates that the node is the candidate SN, the terminal device evaluates the second candidate cell.
  • the first information is used to indicate a node used to trigger the CPAC associated with the second candidate cell, and the node includes one or more of a source MN, a source SN, and a candidate MN.
  • the terminal device stops evaluating the second candidate cell; and/or if the first information indicates that the node is the candidate MN and the terminal device switches to the candidate MN, the terminal device evaluates the second candidate cell; and/or if the first information indicates that the node is the source SN and the terminal device switches to the first candidate cell and retains the source SN, the terminal device evaluates the second candidate cell; and/or if the first information indicates that the node is the source SN and the terminal device switches to the first candidate cell and releases the source SN, the terminal device stops evaluating the second candidate cell.
  • the stop condition of the third timer includes: the signal quality of the first candidate cell is lower than a threshold; and/or the signal quality of the source cell of the terminal device is higher than a threshold.
  • FIG. 6 is a schematic diagram of a terminal device in an embodiment of the present application.
  • the terminal device 600 shown in FIG. 6 includes: a processing unit 610 .
  • the processing unit 610 is used to access the first candidate cell at the second time; wherein the first candidate cell is a conditional switching CHO candidate cell, the second candidate cell is a conditional primary and secondary cell addition/change CPAC candidate cell, and the first candidate cell is associated with the second candidate cell.
  • the second time is determined based on the time when the condition of the first candidate cell is met.
  • the time for satisfying the condition of the first candidate cell is determined based on the time for satisfying a target condition of the first candidate cell, where the target condition is obtained by relaxing the condition of the first candidate cell.
  • the second time is associated with a second timer, and the second timer is used to indicate a duration for evaluating the first candidate cell.
  • the start conditions of the second timer include one or more of the following: the conditions of the first candidate cell are met; the conditions of the second candidate cell are met; the conditions of the fifth candidate cell associated with the first candidate cell are not met, and the fifth candidate cell is a CPAC candidate cell; the conditions of the fourth candidate cell associated with the second candidate cell are not met, and the fourth candidate cell is a CHO candidate cell.
  • the stop condition of the second timer includes that a condition of the first candidate cell is met or a condition of the second candidate cell is met.
  • the second time is the time after the second timer stops.
  • the processing unit is further used to: the terminal device performs one or more of the following operations: CHO for the first candidate cell; re-evaluation of the candidate cells of the terminal device; performing CHO and CPAC for the target candidate cell and other candidate cells associated with the target candidate cell, and the conditions for CHO corresponding to the target candidate cell are met; performing CHO and CPAC for the target candidate cell and other candidate cells associated with the target candidate cell, and the conditions for CPAC corresponding to the target candidate cell are met.
  • the processing unit 510 may be a processor 710.
  • the terminal device 500 may further include a transceiver 730 and a memory 720, as specifically shown in FIG7 .
  • the processing unit 610 may be a processor 710.
  • the terminal device 600 may further include a transceiver 730 and a memory 720, as specifically shown in FIG7 .
  • FIG7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the dotted lines in FIG7 indicate that the unit or module is optional.
  • the device 700 may be used to implement the method described in the above method embodiment.
  • the device 700 may be a chip, a terminal device or a network device.
  • the device 700 may include one or more processors 710.
  • the processor 710 may support the device 700 to implement the method described in the above method embodiment.
  • the processor 710 may be a general-purpose processor or a special-purpose processor.
  • the processor may be a central processing unit (CPU).
  • the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • ASIC application specific integrated circuits
  • FPGA field programmable gate arrays
  • a general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
  • the apparatus 700 may further include one or more memories 720.
  • the memory 720 stores a program, which can be executed by the processor 710, so that the processor 710 executes the method described in the above method embodiment.
  • the memory 720 may be independent of the processor 710 or integrated in the processor 710.
  • the apparatus 700 may further include a transceiver 730.
  • the processor 710 may communicate with other devices or chips through the transceiver 730.
  • the processor 710 may transmit and receive data with other devices or chips through the transceiver 730.
  • the present application also provides a computer-readable storage medium for storing a program.
  • the computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes a program.
  • the computer program product can be applied to the terminal or network device provided in the embodiment of the present application, and the program enables the computer to execute the method performed by the terminal or network device in each embodiment of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal or network device in each embodiment of the present application.
  • the "indication" mentioned can be a direct indication, an indirect indication, or an indication of an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B can also be determined according to A and/or other information.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.
  • pre-definition or “pre-configuration” can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method.
  • pre-definition can refer to what is defined in the protocol.
  • the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.
  • the term "and/or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
  • the size of the serial numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
  • the computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.
  • a magnetic medium e.g., a floppy disk, a hard disk, a magnetic tape
  • an optical medium e.g., a digital video disc (DVD)
  • DVD digital video disc
  • SSD solid state disk

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Abstract

提供了一种用于无线通信的方法及终端设备。该方法包括：若第一候选小区的条件满足，且第二候选小区的条件不满足，终端设备执行第一操作；其中，第一候选小区为条件切换CHO候选小区，第二候选小区为条件主辅小区添加/变更CPAC候选小区，第一候选小区与第二候选小区关联；其中，第一操作包括以下中的一种或多种：在第一时间接入第一候选小区；接入第一候选小区；释放或保留服务辅小区组SCG；对第二候选小区进行评估；停止对第二候选小区进行评估；对第一候选小区进行评估；停止对第一候选小区进行评估；以及驻留在源小区，有助于降低终端设备与网络设备之间通信失败的可能性。

Description

用于无线通信的方法及终端设备 技术领域
本申请涉及通信技术领域，并且更为具体地，涉及一种用于无线通信的方法及终端设备。
背景技术
在条件切换(conditional handover，CHO)过程中，终端设备可以基于CHO关联的切换条件，执行基于CHO候选小区的切换。在条件主辅小区添加/变更(conditional primary secondary cell addition/change，CPAC)过程中，终端设备可以基于CPAC关联的添加/变更条件，执行基于CPAC候选小区的切换。
然而，在上述CHO与CPAC结合的场景中，CHO关联的条件切换事件与CPAC关联的添加/变更条件之间是独立的配置的，可能存在CHO关联的条件切换事件与CPAC关联的添加/变更条件并不同时满足的情况。目前，通信协议中并未针对上述情况规定终端设备的行为，此时，终端设备与网络设备之间的理解不一致，导致终端设备与网络设备之间通信失败。
发明内容
本申请提供一种用于无线通信的方法及终端设备。下面对本申请涉及的各个方面进行介绍。
第一方面，提供了一种用于无线通信的方法，包括：若第一候选小区的条件满足，且第二候选小区的条件不满足，终端设备执行第一操作；其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联；其中，所述第一操作包括以下中的一种或多种：在第一时间接入所述第一候选小区；接入第一候选小区；释放或保留服务辅小区组SCG；对所述第二候选小区进行评估；停止对所述第二候选小区进行评估；对所述第一候选小区进行评估；停止对所述第一候选小区进行评估；以及驻留在源小区。
第二方面，提供了一种用于无线通信的方法，包括：若满足第二候选小区的条件的时间与满足第一候选小区的条件的时间不同，则终端设备在第二时间接入所述第一候选小区；其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联。
第三方面，提供了一种终端设备，包括：若第一候选小区的条件满足，且第二候选小区的条件不满足，处理单元，用于执行第一操作；其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联；其中，所述第一操作包括以下中的一种或多种：在第一时间接入所述第一候选小区；接入第一候选小区；释放或保留服务辅小区组SCG；对所述第二候选小区进行评估；停止对所述第二候选小区进行评估；对所述第一候选小区进行评估；停止对所述第一候选小区进行评估；以及驻留在源小区。
第四方面，提供了一种终端设备，包括：若满足第二候选小区的条件的时间与满足第一候选小区的条件的时间不同，则处理单元用于在第二时间接入所述第一候选小区；其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联。
第五方面，提供一种终端设备，包括处理器、存储器以及通信接口，所述存储器用于存储一个或多个计算机程序，所述处理器用于调用所述存储器中的计算机程序，使得所述终端设备执行上述方面的方法中的部分或全部步骤。
第六方面，本申请实施例提供了一种通信系统，该系统包括上述的终端设备和/或网络设备。在另一种可能的设计中，该系统还可以包括本申请实施例提供的方案中与终端设备或网络设备进行交互的其他设备。
第七方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序使得通信设备(例如，终端设备或网络设备)执行上述各个方面的方法中的部分或全部步骤。
第八方面，本申请实施例提供了一种计算机程序产品，其中，所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，所述计算机程序可操作来使通信设备(例如，终端设备或网络设备)执行上述各个方面的方法中的部分或全部步骤。在一些实现方式中，该计算机程序产品可以为一个软件安装包。
第九方面，本申请实施例提供了一种芯片，该芯片包括存储器和处理器，处理器可以从存储器中调用并运行计算机程序，以实现上述各个方面的方法中所描述的部分或全部步骤。
本申请实施例提供了一种用于无线通信的方法，以规定在CHO关联的条件切换事件与CPAC关联的添加/变更条件并不同时满足的情况下终端设备的行为，有助于降低终端设备与网络设备之间通信失败的可能性。
附图说明
图1是本申请实施例应用的无线通信系统100。
图2是本申请实施例适用的传统的切换流程的示意图。
图3是本申请实施例的无线通信方法的示意性流程图。
图4是本申请实施例中基于放松后的条件接入CPAC候选小区的示意图。
图5本申请实施例中终端设备的示意图。
图6本申请另一实施例中终端设备的示意图。
图7是本申请实施例的通信装置的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例提供的方法可用于各种双连接多制式双连接(multiple RAT dual connectivity，MR-DC)架构。例如，第四代(4th generation，4G)通信系统与第五代(5th generation，5G)通信系统的双连接、5G通信系统与4G通信系统的双连接，或者5G通信系统与5G通信系统的双连接等等。
上述4G通信系统与5G通信系统的双连接可以包括：演进通用陆地无线接入(evolved universal terrestrial radio access，E-UTRA)系统和新无线(new radio，NR)系统的双连接(E-UTRA-NR dual connectivity，EN-DC)，和5G核心网下的E-UTRA系统和NR系统的双连接(NG-RAN E-UTRA-NR dual connectivity，NGEN-DC)等。其中，EN-DC也可以称为选项3系列(option 3series)。EN-DC是以长期演进(long term evolution，LTE)基站，
例如eNB，作为主节点(master node，MN)或主基站，以NR基站，例如gNB，作为辅节点(secondary node，SN)或辅基站的DC，并且MN和SN分别可以与演进分组核心(evolved packet core，EPC)网有数据面连接，即4G核心网，为终端与EPC之间的数据提供空口传输资源。NGEN-DC也可以称为选项7系列(option 7series)。NG EN-DC是以LTE基站，例如ng-eNB，作为MN，以NR基站，例如gNB，作为SN的DC，与EN-DC不同的是，NG EN-DC中，MN和SN都连接5G核心网(5G core network，5GC)，为终端与5GC之间的数据提供空口传输资源。
5G通信系统与4G通信系统的双连接可以包括NR系统和E-UTRA系统的双连接(NRE-UTRA dual connectivity，NE-DC)等。NE-DC也可以称为选项4系列(option 4series)。NE-DC是以NR基站，例如gNB，作为MN，以LTE基站，例如ng-eNB，作为SN，并且MN和SN分别可以与5GC有数据面连接，为终端与5GC之间的数据提供空口传输资源。
5G通信系统与5G通信系统的双连接可以包括NR系统与NR系统的DC。NR系统与NR系统的DC中，MN和SN都为NR的基站。
下面仅以图1所示通信系统10为例，对本申请实施例提供的方法进行描述。
如图1所示，为本申请实施例提供的通信系统10的架构示意图。图1中，通信系统10可以包括网络设备101、网络设备102、网络设备105、终端设备103和终端设备104。图1仅为示意图，并不构成对本申请提供的技术方案的适用场景的限定。
图1中的网络设备即网络设备101、网络设备102或网络设备105可以是任意一种具有无线收发过程的设备。包括但不限于：LTE中的演进型基站(evolutional Node B，NodeB或eNB或e-NodeB)，NR中的基站(gNodeB或gNB)或收发点(transmission receiving point/transmission reception point，TRP)，3GPP后续演进的等。基站可以是：宏基站，微基站，微微基站，小站，中继站，或，气球站等。多个基站可以支持上述提及的同一种技术的网络，也可以支持上述提及的不同技术的网络。基站可以包含一个或多个共站或非共站的TRP。网络设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或，分布单元(distributed unit，DU)。
图1中的终端即终端设备103或终端设备104是一种具有无线收发过程的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发过程的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的终端、车载终端设备、无人驾驶(self driving)中的终端、辅助驾驶中的终端、远程医疗(remote medical)中的终端、智能电网(smart grid)中的终端、运输安全(transportation safety)中的终端、智慧城市 (smart city)中的终端、智慧家庭(smart home)中的终端等等。本申请的实施例对应用场景不做限定。终端有时也可以称为终端设备、用户设备(user equipment，UE)、接入终端、车载终端、工业控制终端、UE单元、UE站、移动站、移动台、远方站、远程终端、移动设备、UE终端设备、无线通信设备、机器终端、UE代理或UE装置等。终端可以是固定的，也可以是移动的。
作为示例而非限定，在本申请实施例中，终端可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的过程。广义穿戴式智能设备包括过程全、尺寸大、可不依赖智能手机实现完整或者部分的过程，例如：智能手表或智能眼镜等，以及只专注于某一类应用过程，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
为了便于理解，下文介绍本申请实施例涉及的通信过程。
传统的切换过程
与LTE系统相似，NR系统支持处于连接态的终端设备进行的切换过程。当正在使用网络服务的终端设备从一个小区移动到另一个小区，或由于无线传输业务负荷量调整、激活操作维护、设备故障等原因，为了保证通信的连续性和服务的质量，网络设备要将终端设备与源小区(又称“源基站”)的通信链路切换到新的小区(又称“目标小区或目标基站”)上，即执行切换过程。
为了便于理解，下文结合图2介绍传统的切换过程。参见图2所示，图2所示的方法包括步骤S210至步骤S260。
在步骤S210中，源网络设备基于终端设备上报的L3测量结果触发切换，并通过Xn接口向目标小区所在的目标网络设备发送切换请求(HANDOVER REQUEST)。
在步骤S220中，响应于切换请求，目标网络设备执行接纳控制(admission control)。
在步骤S230中，目标网络设备向源网络设备发送切换请求确认(HANDOVER REQUEST ACKNOWLEDGE)消息。
在一些实现方式中，切换请求确认中可以包括目标小区的RRC配置。
在步骤S240中，源网络设备向终端设备发送RRC重配置(RRC Reconfiguration)消息，指示终端设备发起切换过程。
在一些实现方式中，RRC重配置消息包括用于接入目标小区的RRC配置信息。
在步骤S250中，终端设备接入目标小区。
在步骤S260中，终端设备向目标网络设备发送RRC重配置完成(RRC Reconfiguration Complete)消息。
CPAC过程
为了便于理解，下文结合图1介绍CPAC过程。图1中，终端设备103或终端设备104可以与网络设备101和网络设备102双连接，其中，一个网络设备为MN，另一个网络设备为SN。MN中的一个或多个服务小区属于主小区组(master cell group，MCG)。通常，MCG可以包括主小区(primary cell，PCell)。在一些实现方式中，MCG除了包含PCell，还可以包括一个或多个辅小区(secondary cell，SCell)。SN中的一个或多个服务小区属于辅小区组(secondary cell group，SCG)。通常，SCG中可以包括主辅小区(primary secondary cell，PSCell)。在一些实现方式中，SCG除了包括PSCell还可以包括一个或多个SCell。
在图1所示的通信系统10中，终端设备103或终端设备104可以进行CPAC。例如，终端设备103可以通过下述示例1进行条件主辅小区添加(conditional PSCell addition，CPA)，通过下述示例2进行条件主辅小区变更(conditional PSCell change，CPC)。
示例1，以终端设备103与网络设备101建立了RRC连接，终端设备103要进行CPA，与网络设备102建立连接为例，网络设备101与终端设备103建立RRC连接后，可以为终端设备103配置一个或多个候选PSCell，该一个或多个候选PSCell包括网络设备102为终端设备103配置的PSCell和其他网络设备为终端设备103配置的PSCell；网络设备101向终端设备103发送该一个或多个候选PSCell的配置信息1，候选PSCell的配置信息1包括候选PSCell的配置1和添加条件。终端设备103接收到来自网络设备101的该一个或多个候选PSCell的配置信息1，可以检测该一个或多个候选PSCell的添加条件，在检测到至少一个满足添加条件的候选PSCell时，终端设备103选择其中一个候选PSCell(如网络设备102为终端配置的候选PSCell)，并应用该候选PSCell的配置。后续，终端设备103与该候选PSCell发起随机接入，并在候选PSCell随机接入成功之后，与网络设备101和网络设备102建立了双连接。其中，候选PSCell的配置信息1也可以称为候选PSCell的CPA配置信息1，本申请实施例对该 配置信息的名称不予限制。
可以理解的，终端设备103检测到多个满足添加条件的候选PSCell时，可以根据预置的策略选择一个候选PSCell，并应用该候选PSCell的配置。例如，终端设备103检测到多个满足添加条件的候选PSCell时，可以随机选择一个候选PSCell，并应用该候选PSCell的配置；或者，可以在该多个满足添加条件的候选PSCell中，选择信号质量最好的候选PSCell，并应用该候选PSCell的配置；或者，可以在该多个满足添加条件并且波束(beam)数量大于或等于门限值的候选PSCell中，选择波束数量最多的候选PSCell，并应用该候选PSCell的配置。上述仅是终端设备103选择候选PSCell的示例，终端设备103还可以通过其他方式选择候选PSCell，不予限制。
示例2，以终端设备103与网络设备101和网络设备102双连接，网络设备101为MN，网络设备102为SN，终端设备103要进行CPC为例，网络设备101可以为终端设备103配置一个或多个候选PSCell；网络设备101向终端设备103发送该一个或多个候选PSCell的配置信息2，候选PSCell的配置信息2包括候选PSCell的配置2和变更条件。终端设备103接收到来自网络设备101的该一个或多个候选PSCell的配置信息2，可以检测该一个或多个候选PSCell的变更条件，在检测到至少一个满足变更条件的候选PSCell时，终端设备103选择其中一个候选PSCell，并应用该候选PSCell的配置。后续，终端设备103与该候选PSCell发起随机接入，并在候选PSCell随机接入成功之后，与网络设备101和该候选PSCell所属辅基站建立了双连接。其中，候选PSCell的配置信息2也可以称为候选PSCell的CPC配置信息2，不予限制。
可以理解的，终端设备103检测到多个满足变更条件的候选PSCell时，可以根据预置的策略选择一个候选PSCell，并应用该候选PSCell的配置。例如，终端设备103检测到多个满足变更条件的候选PSCell时，可以随机选择一个候选PSCell，并应用该候选PSCell的配置；或者，可以在该多个满足变更条件的候选PSCell中，选择信号质量最好的候选PSCell，并应用该候选PSCell的配置；或者，可以在该多个满足变更条件并且波束(beam)数量大于或等于门限值的候选PSCell中，选择波束数量最多的候选PSCell，并应用该候选PSCell的配置。上述仅是终端设备103选择候选PSCell的示例，终端设备103还可以通过其他方式选择候选PSCell，不予限制。
需要说明的是，在本申请实施例中，对于任一网络设备为终端配置的一个或多个候选PSCell中的任一候选PSCell，终端进行CPA时，候选PSCell的配置信息1，以及终端进行CPC时，候选PSCell的配置信息2可以统称为候选PSCell的配置信息，终端进行CPA时候选PSCell的配置1以及终端进行CPC时候选PSCell的配置2可以统称为候选PSCell的配置。该候选PSCell的配置信息包括候选PSCell的配置和添加/变更条件。其中，终端进行CPA时，候选PSCell的配置用于终端添加该候选PSCell后，与该候选PSCell通信，候选PSCell的添加/变更条件包括候选PSCell的添加条件，候选PSCell的添加条件用于终端确定是否添加该候选PSCell。终端进行CPC时，候选PSCell的配置用于终端将源PSCell变更为该候选PSCell后与该候选PSCell通信，候选PSCell的添加/变更条件包括候选PSCell的变更条件，候选PSCell的变更条件用于终端确定是否将源PSCell变更为该候选PSCell。
在终端设备103接收到了一个或多个候选PSCell的配置和添加/变更条件，但是还没有检测出满足添加/变更条件的PSCell时，终端设备103还可以从当前MN切换到信号质量较好的目标MN，例如，终端设备103可以从网络设备101切换到网络设备105上。通常，当终端设备103执行MN切换后，当前MN会释放为终端设备103配置的一个或多个候选PSCell，目标MN与终端设备103建立RRC连接后，可以重新为终端设备103配置一个或多个候选PSCell，并向终端设备103发送目标MN为终端配置的一个或多个候选PSCell的配置信息用于终端进行CPAC，目标MN为终端配置的一个或多个候选PSCell的配置信息包括该候选PSCell的配置和添加/变更条件。
通常，候选PSCell的配置和添加/变更条件一般包括较多的信息，例如，候选PSCell的配置包括：候选PSCell的配置的标识，和/或，候选PSCell为终端分配的随机接入资源，和/或，小区无线网络临时标识(cell radio network temporary identifier，CRNIT)，和/或，候选PSCell的全球小区识别码(cell global identification，CGI)，和/或，候选PSCell的物理小区标识(physical cell identifier，PCI)，和/或，候选PSCell对应的频率信息。候选PSCell对应的频率信息可以包括以下一种或多种：同步信号块的绝对频率(如absoluteFrequency SSB)、参考资源模块(common RB0)的绝对频率位置(如absoluteFrequencyPointA)、频率带宽列表(如frequencyBandList)、子载波间隔(subcarrier spacing，SCS)特定的载波列表(如scs-SpecificCarrierList)等。候选PSCell的配置还包括候选PSCell对应的资源信息，候选PSCell对应的资源信息包括以下一种或多种：承载配置参数(radioBearerConfig)、小区组配置(cellGroupConfig)参数、物理层(physical layer，PHY layer)配置参数、媒体接入控制(media access control，MAC)层配置参数、无线链路控制(radio link control，RLC)层配置参数、分组数据汇聚层协议(packet data convergence protocol，PDCP)层配置参数、服务数据适配协议(service data adaptation protocol，SDAP)层配置参数或RRC层配置参数。 候选PSCell的配置也可以称为候选PSCell的CPAC配置、候选PSCell的CPAC配置信息等，本申请实施例对上述配置的名称不作具体限定。
候选PSCell的添加/变更条件用于终端确定是否添加该候选PSCell，或者用于终端确定是否将源PSCell变更为该候选PSCell，例如，若终端检测到候选PSCell满足该候选PSCell的添加/变更条件时，终端确定添加该候选PSCell，或者将源PSCell变更为该候选PSCell，若终端检测到候选PSCell不满足该候选PSCell的添加/变更条件时，终端确定不添加该候选PSCell，或者不将源PSCell变更为该候选PSCell。
可选的，候选PSCell的添加/变更条件包括候选PSCell的添加/变更条件的执行事件类型，该执行事件类型也可以称为测量事件或者上报事件等。终端可以测量该候选PSCell的信号质量，或者测量该候选PSCell的信号质量和该候选PSCell的邻区的信号质量，并根据测量结果和该执行事件类型确定是否添加该候选PSCell，或者确定是否将源PSCell变更为该候选PSCell。
通常，在终端设备执行上文介绍的CPAC过程之前，网络设备会为终端设备提供CPAC配置，相应地，终端设备在基于网络设备提供的CPAC配置变更PSCell。在一些实现方式中，网络设备可以根据业务情况(例如，传输时延、待传输数据的数据量等)以及信道测量情况(例如，信道状态)来判断终端设备是否需要CPAC。
另外，在一些实现方式中，上述CPAC配置可以包括候选小区配置列表、执行条件以及小区配置。
上述候选小区列表可以理解为是用于CPA或CPC的候选小区配置列表。在该候选小区列表中可以包含一个或多个候选小区的小区信息。每个候选小区的小区信息可以包含配置信息标识。需要说明的是，配置信息的ID可以基于网络设备为终端设备配置的候选小区的数量确定。例如，网络设备为终端设备提供5个候选小区配置，那么上述小区的配置信息ID可以用于标识5个候选小区配置。
上述执行条件可以是用于指示终端设备执行CPA或CPC的执行条件，该执行条件又称“CPAC条件”，或者又称为用于CPAC的条件，或者又称为CPAC候选小区的条件。
在本申请实施例中，对CPAC条件的实现方式不作限定，例如，CPAC条件可以包括事件A3(CondEvent A3)，相应地，若邻区的服务质量RSRP比服务小区(PCell/PSCell)高出一个绝对门限，触发A3事件切换。
又例如，CPAC条件可以包括事件A4(CondEvent A4)，相应地，若邻区RSRP值大于门限，触发A4事件切换。
又例如，CPAC条件可以包括事件A5(CondEvent A5)，相应地，服务小区的服务质量低于一个绝对门限1，且邻区的服务质量高于一个绝对门限2，触发A5事件切换。
上述小区配置可以由候选SN提供给MN的SCG配置。在一些实现方式中，上述SCG配置可以由SN通过Xn接口发送给MN，相应地，由MN透传给终端设备。在一种实现方式中，上述SCG配置可以包括候选SCG的配置，其中，候选SCG的配置可以包含小区ID、无线承载配置、逻辑信道配置、RLC配置、MAC配置、物理层配置以及SCell配置。
需要说明的是，如上文介绍一个SCG可以包含一个或多个SCell，相应地，上述SCG配置可以包含一个或多个SCell配置，本申请实施例对此不作限定。
另外，在本申请实施例中，CPAC中的CPC以及CPA之间可以是或的关系，也即是说，本申请实施例中的CPAC可以替换为“CPA或CPC”，或者表示为“CPA/CPC”。
CHO
对于CHO机制而言，网络设备可以将一个或多个CHO候选小区的配置，以及一个或多个CHO候选小区关联的条件切换事件配置给终端设备，相应地，终端设备可以执行切换条件评估任务，以评估上述一个或多个CHO候选小区关联的条件切换事件是否满足。当上述一个或多个CHO候选小区关联的条件切换事件满足时，终端设备可以从源小区(或者称“当前服务小区”)切换到满足条件切换事件的对应CHO候选小区，此时，终端设备接入的CHO候选小区可以称为“目标小区或目标CHO小区”。
CHO与CPAC结合过程
目前，一些通信协议(例如，R17)支持在CHO候选小区配置中携带SCG的配置信息，以便终端设备可以快速建立双链接。由于CHO候选小区是预配置的，可能会导致由于SCG小区配置不合理从而触发SCG添加失败的情况。因此，在另一些通信协议中(例如，R10)引入了CHO与CPAC结合的机制，又称“CHO+CPAC过程”，即CHO候选小区可以关联至少一个CPAC候选小区，如此，终端设备可以基于条件选择相应的SCG，并执行添加，有助于改善SCG小区配置不合理的情况。
在一些实现方式中，终端设备执行的CHO可以由服务MN(或者源MN)触发。另外，终端设备的CHO候选小区可以由服务MN(或者源MN)确定。
在另一些实现方式中，终端设备执行的CPAC可以由服务MN(或者源MN)、服务SN、候选SN 中的一个或多个节点触发，相应地，CPAC候选小区可以由触发节点确定。
在另一些实现方式中，CHO候选小区配置和/或CPA/CPC候选小区配置，可以由候选MN和/或候选SN提供。其中，执行候选小区条件评估包括评估候选小区条件关联的测量事件。
如前文所述，在CHO过程中，终端设备可以基于CHO关联的切换条件，执行基于CHO候选小区的切换。在CPAC过程中，终端设备可以基于CPAC关联的添加/变更条件，执行基于CPAC候选小区的切换。然而，在上述CHO与CPAC结合的场景中，CHO关联的条件切换事件与CPAC关联的添加/变更条件之间是独立的配置的，可能存在CHO关联的条件切换事件与CPAC关联的添加/变更条件并不同时满足的情况。目前，通信协议中并未针对上述情况规定终端设备的行为，此时，终端设备与网络设备之间的理解不一致，导致终端设备与网络设备之间通信失败。
因此，针对上述问题，本申请实施例提供了一种用于无线通信的方法，以规定在上述情况下终端设备的行为。下文基于场景1以及场景2介绍本申请实施例的方法。
场景1，第一候选小区的条件满足，且第二候选小区的条件不满足。
上述第一候选小区可以为CHO候选小区，或者说与CHO关联的候选小区。在一些实现方式中，CHO候选小区可以用于选择MN，或者说，CHO候选小区可以用于选择PCell或者说，CHO候选小区可以用于选择MCG。相应地，第一候选小区的条件可以理解为第一候选小区的关联的CHO切换条件，或者说，执行针对第一候选小区的CHO时使用的切换条件。例如，第一候选小区的条件可以包括执行针对第一候选小区的CHO所使用的条件切换事件。通常，在满足第一候选小区的条件时，终端设备可以接入第一候选小区。
另外，在本申请实施例中，对第一候选小区的数量不作限定，例如，第一候选小区可以包括一个或多个CHO候选小区。为了便于描述，下文以第一候选小区包括一个CHO候选小区为例进行说明，本申请实施例的方案也同样适用于多个CHO候选小区的情况。
上述第二候选小区可以为CPAC候选小区，或者说与CPAC关联的候选小区。在一些实现方式中，CPAC候选小区可以用于选择SN，或者说，CPAC候选小区可以用于选择PSCell，或者说，CPAC候选小区可以用于选择SCG。相应地，第二候选小区的条件可以理解为第二候选小区的关联的添加/变更条件，或者说，执行针对第二候选小区的CPAC时使用的添加/变更条件。通常，在满足第二候选小区的条件时，终端设备可以接入第二候选小区。其中，在本申请实施例中，接入第二候选小区又可以称为添加/变更第二候选小区。
另外，在本申请实施例中，对第二候选小区的数量不作限定，例如，第二候选小区可以为一个或多个。
上述第二候选小区与第一候选小区关联，例如，在第一候选小区的配置中携带有第二候选小区的配置信息。
上文介绍了本申请实施例的场景1，下文结合图3，介绍实施例1～实施例6中终端设备的行为，即终端设备执行的第一操作(参见步骤S310)。
实施例1，第一操作包括终端设备在第一时间接入第一候选小区。
在一些实现方式中，第一时间基于满足第二候选小区的条件的时间确定，例如，第一时间可以为满足第二候选小区的条件的时间，当然，在本申请实施中，第一时间还可以是晚于满足第二候选小区的条件的时间的任一时间。
若第一时间为满足第二候选小区的条件的时间，则终端设备执行第一操作可以理解为在满足第二候选小区的条件的情况下，终端设备接入第一候选小区，或者说，终端设备等到第二候选小区的条件满足时，接入第一候选小区。
需要说明的是，在若终端设备接入第一候选小区，则终端设备可以接入第二候选小区，也即是说，在满足第二候选小区的条件的情况下，终端设备接入第一候选小区和第二候选小区。当然，在本申请实施例中，终端设备也可以不接入第二候选小区。
在本申请实施例中，对上述满足第二候选小区的条件不作限定。在一些实现方式中，上述满足第二候选小区的条件可以理解为，经过对第二候选小区的条件进行放松后，第二候选小区的条件被满足，或者说，满足放松后第二候选小区的条件，又或者说，经过对第二候选小区的测量进行放松后，满足第二候选小区的条件。相应地，上述满足第二候选小区的条件的时间可以基于满足放松后第二候选小区的条件对应的时间确定。
换句话说，满足第二候选小区的条件的时间基于满足第二候选小区的目标条件的时间确定，目标条件为对第二候选小区的条件进行放松得到的，目标条件为对第二候选小区的条件进行放松得到的。又或者说，满足第二候选小区的条件的时间基于对第二候选小区的测量进行放松后，满足第二候选小区的条件的时间。
在本申请实施例中，上述满足第二候选小区的条件的时间基于满足第二候选小区的目标条件的时间确定，可以理解为，上述满足第二候选小区的条件的时间等于满足第二候选小区的目标条件的时间。当然，上述满足第二候选小区的条件的时间可以晚于满足第二候选小区的目标条件的时间。
在一些实现方式中，终端设备通常会监测第二候选小区的信道条件，来确定是否满足第二候选小区的条件，且只有在预定义时间段(例如，触发时间TTT)内都满足的情况下，终端设备才可以接入第二候选小区。相应地，在本申请实施例中，对第二候选小区的测量进行放松，可以包括跳过在预定义时间段内测量一个或多个相邻小区(包括第二候选小区)的信道条件，或者说，不需要在预定义时间段测量一个或多个相邻小区(包括第二候选小区)的信道条件，或者说，将上述预定义时间段的时长调整为0。
当然，在本申请实施例中，上述对第二候选小区的测量进行放松，还可以包括缩短预定义时间段的时长，例如，对第二候选小区的测量进行放松后，第二候选小区关联的TTT的时长小于第二候选小区关联的原始TTT，其中，原始TTT是对第二候选小区的测量进行放松前的TTT。
另外，上述第二候选小区的条件例如可以包括事件A3、事件A4以及事件A5中的一种或多种，当然，上述第二候选小区的条件还可以包括其他条件，本申请实施例对此不作限定。
例如，CHO候选小区1与CPAC候选小区1关联，若CHO候选小区1满足接入条件(entering condition)，则在CHO候选小区1对应的TTT1内需要对CHO候选小区1持续测量，以确定在TTT1内CHO候选小区1满足条件，只有在TTT1内CHO候选小区1满足条件，才可以认为CHO候选小区1满足条件。同理，若CPAC候选小区1满足接入条件(entering condition)，则在CPAC候选小区1对应的TTT2内需要对CPAC候选小区1持续测量，以确定在TTT2内CPAC候选小区1满足条件，只有在TTT2内CPAC候选小区1满足条件，才可以认为CPAC候选小区1满足条件。
参见图4所示，假设CHO候选小区1在时间1满足接入条件，并且在CHO候选小区1对应的TTT1内也满足条件。CPAC候选小区1在时间2满足接入条件，但在CPAC候选小区1对应的TTT2内未满足条件，此时，采用本申请实施例的方案，可以对CPAC候选小区1的条件进行放松，认为CHO候选小区1的条件和CPAC候选小区1的条件同时满足，相应地，终端设备可以接入CHO候选小区1以及CPAC候选小区1。
又例如，在第一候选小区满足条件后，终端设备可以对第二候选小区进行评估，若第二候选小区满足接入条件，则认为第二候选小区的条件满足。
在另一些实现方式中，第二候选小区的条件可以与门限关联。相应地，上述目标条件(或者放松后的第二候选小区的条件)可以包括减小门限。
以第二候选小区的条件包括第二候选小区的测量结果大于门限值1，则满足第二候选小区的条件。相应地，在本申请实施例中，目标条件用于指示第二候选小区的测量结果大于门限值2，则满足第二候选小区的条件，其中，门限值1大于门限值2。
当然，在本申请实施例中，还可以通过其他方式对第二候选小区的条件进行放松。在一些实现方式中，可以通过调整第二候选小区的测量结果来放松第二候选小区的条件。例如，第二候选小区的条件包括第二候选小区的测量结果与预设参数1之间的差值大于门限值，则满足第二候选小区的条件。相应地，在本申请实施例中，目标条件用于指示第二候选小区的测量结果与预设参数2大于门限值，则满足第二候选小区的条件，其中，预设参数1大于预设参数2。
在本申请实施例中，对预设参数的调整方式不作限定。除了上文介绍的，通过减小预设参数来放松第二候选小区的条件之外，在一些实现方式中，还可以通过增大预设参数，来放松第二候选小区的条件。例如，若第二候选小区的条件包括事件A3(CondEvent A3)，则可以通过增大预设参数的方式，来对第二候选小区的条件进行放松。
上文以第一时间基于满足第二候选小区的条件的时间确定为例，介绍了本申请实施例中的第一时间。当然，在本申请实施例中，上述第一时间可以与满足第二候选小区的条件的时间无关。
在一些实现方式中，第一时间可以与第一定时器关联。在一些实现方式中，第一定时器的停止时间可以为第一时间，或者，第一时间可以为第一定时器停止后的某一时间。
在一些实现方式中，上述第一定时器用于指示对候选小区进行评估的时长，也即是说，在第一定时器的运行期间，终端设备可以对候选小区进行评估。
在本申请实施例中，对候选小区不作限定。例如，候选小区可以包括以下一种或多种：第一候选小区、第二候选小区、其他候选小区。其中，其他候选小区可以理解为是终端设备的多个CHO候选小区中除第一候选小区之外的其他候选小区。当然，在本申请实施例中，其他候选小区还可以包括其他候选小区关联的一个或多个CPAC候选小区。
在本申请实施例中，对第一定时器的启动条件或重启条件不作限定。在一些实现方式中，第一定时器的启动条件或重启条件包括第一候选小区的条件满足，也即是说，响应于满足第一候选小区的条件， 终端设备启动或重启第一定时器。
在另一些实现方式中，第一定时器的重启条件包括在第一定时器运行期间第三候选小区的条件满足，其中，第三候选小区为除第一候选小区之外的其他基于CHO的候选小区(又称“其他CHO候选小区”)。
例如，响应于满足CHO候选小区1的条件，终端设备启动第一定时器，并在第一定时器的运行期间对其他候选小区进行评估，此时，如果满足CHO候选小区2的条件，终端设备可以重启第一定时器。
在本申请实施例中，对第一定时器的停止条件不作限定。在一些实现方式中，第一定时器的停止条件包括以下一种或多种：第二候选小区的条件满足；终端设备的源小区的测量结果低于门限；终端设备的源小区发生无线链路失败(radio link failure，RLF)；与RLF相关的定时器启动。
以第一定时器的停止条件包括第二候选小区的条件满足为例，若第二候选小区的条件满足，则终端设备无需再对CHO候选小区(例如，包括第一候选小区)和/或CPAC候选小区(例如，包括第二候选小区)进行评估，此时，可以停止第一定时器。其中，第二候选小区的条件满足可以包括满足放松后第二候选小区的条件，或者，满足放松前第二候选小区的条件。
以第一定时器的停止条件包括终端设备的源小区的测量结果低于门限为例，若源小区的信号质量低于信号质量门限，说明终端设备无法通过源小区与网络设备进行通信，此时，终端设备可以停止第一定时器，并在第一时间接入第一候选小区，以便终端设备可以继续与网络设备保持通信。
在一些场景中，出于一些原因，源小区的测量结果可能仅是暂时低于门限，如果一旦监测到源小区的测量结果低于门限后，终端设备立刻停止第一定时器并切换到第一候选小区，可能导致终端设备频繁切换浪费资源。因此，在一些实现方式中，第一定时间器的停止条件可以包括在第一时间段内源小区的测量结果低于门限，或者说，在第一时间段内源小区的测量结果持续低于门限。其中，第一时间段可以为预定义的时长，例如，第一时间段可以基于定时器控制。
在本申请实施例中，对上述测量结果不作限定。在一些实现方式中，测量结果可以包括源小区的信号质量，相应地，门限可以为信号质量门限，其中，信号质量例如可以是参考信号接收质量(reference signal receiving quality，RSRQ)。在另一些实现中，测量结果可以包括源小区的信号接收功率，相应地，门限可以为信号接收功率门限，其中，参考信号接收功率(reference signal receiving power，RSRP)。
以第一定时器的停止条件包括终端设备的源小区发生RLF为例，若源小区发生RLF，说明终端设备无法通过源小区与网络设备进行通信，此时，终端设备可以停止第一定时器，并在第一时间接入第一候选小区，以便终端设备可以继续与网络设备保持通信。
以第一定时器的停止条件包括与RLF相关的定时器启动为例，若终端设备启动RLF相关的定时器，说明终端设备可能无法通过源小区与网络设备进行通信，此时，终端设备可以停止第一定时器，并在第一时间接入第一候选小区，以便终端设备可以继续与网络设备保持通信。
在一些实现方式中，上述与RLF相关的定时器可以包括用于指示终端设备监测无线链路失败的定时器，例如，定时器310(T310)。通常，当终端设备监测主服务小区的物理层出现问题(例如，连续收到N310个失去同步(out-of-sync)指示时)，启动该定时器。
当然，在本申请实施例中，第一定时器的停止条件还可以包括其他条件。在一些实现方式中，第一候选小区可以关联一个或多个CPAC候选小区(包括第二候选小区)，此时，第一定时器的停止条件可以包括第一候选小区关联的一个或多个CPAC候选小区满足条件。在另一些实现方式中，第一定时器的停止条件还可以包括终端设备获取到多个连续的失步指示，例如，连续收到N310个失步(out-of-sync)指示。
在一些实现方式中，若第一时间为第一定时器停止之后的时间，则在第一时间接入第一候选小区包括在第一时间仅接入第一候选小区。换句话说，若第一定时器停止，则终端设备可以仅接入第一候选小区(即执行CHO-only)。当然，在本申请实施例中，若第一时间为第一定时器停止之后的时间，则在第一时间接入第一候选小区可以包括在第一时间时间接入第一候选小区以及第二候选小区。换句话说，若第一定时器停止，则终端设备可以接入第一候选小区以及第二候选小区。
在本申请实施例中，终端设备仅接入第一候选小区，还是接入第一候选小区以及第二候选小区，可以基于第一定时器的停止条件确定。在一些实现方式中，第一定时器的停止条件为第二候选小区的条件满足，则在第一定时器停止后，终端设备可以接入第一候选小区以及第二候选小区。在另一些实现方式中，在第二候选小区的条件未满足的情况下，在第一定时器停止后，终端设备可以仅接入第一候选小区。其中，在第二候选小区的条件未满足的情况下，第一定时器的停止条件例如可以包括源小区发生RLF，或者第一定时器的停止条件例如可以包括与RLF相关的定时器启动。当然，在本申请实施例中，即使第二候选小区的条件满足，当第一定时器的停止条件包括与RLF相关的定时器启动和/或源小区发生RLF，终端设备可以仅接入第一候选小区。
在一些实现方式中，上述方法还包括：若第一定时器超时，终端设备可以执行仅CHO(CHO-only)配置和/或释放SCG，其中，SCG可以是当前服务SCG。例如，若在第一定时器运行期间，第一候选小区关联的CPAC候选小区的条件未满足，则第一定时器超时后，终端设备可以基于仅CHO(CHO-only)配置仅切换到第一候选小区。又例如，若在第一定时器运行期间，第一候选小区关联的CPAC候选小区的条件未满足，则第一定时器超时后，终端设备可以基于仅CHO(CHO-only)配置仅切换到第一候选小区，并释放当前的服务SCG。
在本申请实施例中，对第一定时器的粒度不作限定。在一些实现方式中，第一定时器可以是与每个CHO候选小区(例如，包括第一候选小区)关联的。例如，第一定时器可以针对每个CHO候选小区进行配置和/或维护的。在另一些实现方式中，第一定时器可以是与多个CHO候选小区(例如，包括第一候选小区)关联的。例如，第一定时器可以针对多个CHO候选小区进行配置和/或维护的，其中多个CHO候选小区例如可以包括CHO候选小区列表中的部分或全部CHO候选小区。
上述第一定时器的粒度可以与第一定时器的启动/重启条件相互结合使用。例如，多个CHO候选小区中的每个CHO候选小区关联一个第一定时器，若某个CHO候选小区的条件满足，则可以启动该CHO候选小区关联的第一定时器。又例如，多个CHO候选小区关联一个第一定时器，若某个CHO候选小区的条件满足，则可以启动第一定时器。若另一个CHO候选小区的条件满足，则可以重启第一定时器。
在一些实现方式中，若第一候选小区的条件满足后，终端设备可以停止对其他CHO候选小区的评估，有助于减少终端设备进行评估所需的功耗。在一些实现方式中，对其他CHO候选小区进行评估可以包括评估其他CHO候选小区关联的条件切换事件是否满足，或者说，对其他CHO候选小区进行评估可以包括终端设备执行CHO候选小区关联的切换条件评估任务。其中，其他CHO候选小区为终端设备的多个CHO候选小区中除第一候选小区之外的其他CHO候选小区。
在一些实现方式中，若第一候选小区的条件满足后，终端设备仅对第一候选小区关联的CPAC候选小区的评估，有助于减少终端设备进行评估所需的功耗。在一些实现方式中，对CPAC候选小区进行评估可以包括评估CPAC候选小区关联的CPAC条件是否满足，或者说，对CPAC候选小区进行评估可以包括终端设备执行CPAC候选小区关联的CPAC条件评估任务。
如上文的介绍，在一些实施例中，终端设备可能仅执行针对第一候选小区的CHO，为了提高终端设备与网络设备通信的可靠性，终端设备可以基于当前服务小区(例如，服务Pcell)的信道质量，确定是否仅执行针对第一候选小区的CHO。例如，终端设备可以监测服务Pcell的信道质量，若服务Pcell的信道质量低于或等于预设门限，则终端设备仅执行针对第一候选小区的CHO。相反地，若服务Pcell的信道质量高于预设门限，则终端设备不能仅执行针对第一候选小区的CHO。
在上述实现方式中，若终端设备仅执行针对第一候选小区的CHO，则终端设备可以释放服务SCG。当然，在本申请实施例中，若终端设备仅执行针对第一候选小区的CHO，则终端设备可以保留服务SCG。
实施例2，第一操作包括终端设备接入第一候选小区。
也即是说，若第一候选小区的条件满足，此时，终端设备可以接入第一候选小区。在本申请实施例中，对第一操作是否包括接入第二候选小区不作限定。例如，第一操作可以仅包括接入第一候选小区，此时，终端设备可以仅接入第一候选小区。又例如，第一操作可以包括接入第一候选小区以及接入第二候选小区，此时，终端设备可以接入第一候选小区以及第二候选小区。
在一些实现方式中，若第一候选小区的条件满足后，终端设备可以停止对其他CHO候选小区的评估，有助于减少终端设备进行评估所需的功耗。在一些实现方式中，对其他CHO候选小区进行评估可以包括评估其他CHO候选小区关联的条件切换事件是否满足，或者说，对其他CHO候选小区进行评估可以包括终端设备执行CHO候选小区关联的切换条件评估任务。其中，其他CHO候选小区为终端设备的多个CHO候选小区中除第一候选小区之外的其他CHO候选小区。
在一些实现方式中，若第一候选小区的条件满足后，终端设备可以停止对第一候选小区关联的CPAC候选小区的评估，有助于减少终端设备进行评估所需的功耗。在一些实现方式中，对CPAC候选小区进行评估可以包括评估CPAC候选小区关联的CPAC条件是否满足，或者说，对CPAC候选小区进行评估可以包括终端设备执行CPAC候选小区关联的CPAC条件评估任务。
如上文的介绍，在一些实施例中，终端设备可能仅执行针对第一候选小区的CHO，为了提高终端设备与网络设备通信的可靠性，终端设备可以基于当前服务小区(例如，服务Pcell)的信道质量，确定是否仅执行针对第一候选小区的CHO。例如，终端设备可以监测服务Pcell的信道质量，若服务Pcell的信道质量低于或等于预设门限，则终端设备仅执行针对第一候选小区的CHO。相反地，若服务Pcell的信道质量高于预设门限，则终端设备不能仅执行针对第一候选小区的CHO。
在上述实现方式中，若终端设备仅执行针对第一候选小区的CHO，则终端设备可以释放服务SCG。当然，在本申请实施例中，若终端设备仅执行针对第一候选小区的CHO，则终端设备可以保留服务SCG。
实施例3，第一操作可以包括终端设备释放或保留服务SCG。
目前，协议中未规定针对上述场景1中终端设备关于服务SCG的处理方式。如果规定在第一候选小区的条件满足，且第二候选小区的条件未满足的情况下，终端设备释放服务SCG其实是不必要的，降低了终端设备基于SCG进行通信的可能性。
在一些场景中，服务SCG可能与第一候选小区关联，例如，服务SCG属于第一候选小区关联的候选SCG列表，此时，即使终端设备接入第一候选小区后，也可以基于服务SCG进行通信。因此，在上述情况下终端设备可以保留服务SCG。也即是说，若第一操作包括保留服务SCG，服务SCG属于候选SCG列表，其中，保留服务SCG可以理解为保留服务SCG的配置，和/或，保留服务SCG的连接。当然，在本申请实例中，若服务SCG与第一候选小区不关联，例如，服务SCG不属于第一候选小区关联的候选SCG列表，终端设备可以释放服务SCG。
如果终端设备保留服务SCG，为了提高终端设备通信的可靠性，可以设置服务SCG为激活态或非激活态。在一些实现方式中，若服务SCG的条件不满足，终端设备设置服务SCG为去激活态。在另一些实现方式中，若服务SCG的条件满足，终端设备设置服务SCG为激活态。
在本申请实施例中，对上述服务SCG的条件不作限定。在一些实现方式中，上述服务SCG的条件用于执行针对服务SCG的CPAC，或者上述服务SCG的条件可以包括服务SCG关联的添加/变更条件，其中，服务SCG的条件可以与服务SCG的信道质量关联。例如，上述服务SCG的条件可以包括执行针对服务SCG的CPAC的事件A4(Event A4)。
在一些场景中，为了提高终端设备通信的可靠性，服务SCG即使属于候选SCG列表，终端设备可以基于服务SCG的信号质量，确定保留服务SCG或释放服务SCG。在一些实现方式中，若服务SCG的条件不满足，且服务SCG的信号质量较差(例如，服务SCG的信号质量低于阈值)，则终端设备可以释放服务SCG。在另一些实现方式中，若服务SCG的条件不满足，但服务SCG的信号质量较好(例如，服务SCG的信号质量高于阈值)，则终端设备可以保留服务SCG。
在本申请实施例中，对上述服务SCG的条件不作限定。在一些实现方式中，上述服务SCG的条件用于执行针对服务SCG的CPAC，或者上述服务SCG的条件可以包括服务SCG关联的添加/变更条件。例如，上述服务SCG的条件可以包括执行针对服务SCG的CPAC的事件A3(Event A3)或事件A5(Event A5)。又例如，上述服务SCG的条件可以与服务SCG测量配置关联。
例如，假设候选SCG列表与CHO候选小区1关联，服务SCG1是候选SCG列表中的一个，且CPAC候选小区的执行条件包括事件A3。在CHO候选小区1满足条件后，终端设备可以判断服务SCG1的测量结果是否满足RSRP阈值。若服务SCG1的测量结果满足RSRP阈值，终端设备执行CHO接入CHO候选小区，并与服务SCG1保持连接。
在一些实现方式中，终端设备即使保留服务SCG，但由于终端设备切换到了第一候选小区，终端设备可以基于候选小区配置进行安全密钥和/或承载(例如，SRB3)的配置更新。
实施例4，第一操作包括对第二候选小区进行评估或停止对第二候选小区进行评估。
目前，终端设备接入第一候选小区后，如果持续对所有的第二候选小区CPAC候选小区进行评估，可能会导致终端设备的功耗增大。如果只对第一候选小区关联的CPAC候选小区进行评估，可能无法选到合适的SCG，进而导致终端设备与网络设备的通信性能降低。因此，针对上述问题，本申请实施例还提供了一种判断方式，下文结合示例1至示例3进行介绍。
示例1，终端设备可以基于第一信息，确定对第二候选小区进行评估或停止对第二候选小区进行评估，或者说，第一信息用于指示终端设备对第二候选小区进行评估或者停止对第二候选小区评估，此时第一信息又可以称为“第一指示信息”。也即是说，可以通过第一信息，以显示信令的方式指示终端设备对第二候选小区进行评估或停止对第二候选小区进行评估。
在本申请实施例中，对第一信息的承载方式不作限定。在一些实现方式中，第一信息可以承载于第一候选小区的配置信息中。当然，在本申请实施例中，上述第一信息还可以是单独传输的信息。
在一些实现方式中，终端设备可以停止对CPAC候选小区的评估，此时，终端设备可以保留CPAC候选小区的条件，以便下次对CPAC候选小区进行评估，以减少传输CPAC候选小区的条件所需的传输开销。当然，在本申请实施例中，若终端设备停止对CPAC候选小区的评估，则终端设备可以释放CPAC候选小区的配置。其中，CPAC候选小区的配置例如可以包括CPAC候选小区的执行条件配置，和/或CPAC候选小区的配置例如可以包括CPAC候选小区的候选小区配置。
另外，在本申请实施例中，若终端设备停止对CPAC候选小区的评估，可以基于指示信息的指示，重新开始对CPAC候选小区的评估。其中，指示信息例如可以是用于更新/配置CPAC评估条件的消息(例如，RRC消息)。
例如，若CHO候选小区1配置中包含第一信息，第一信息用于指示对第二候选小区进行评估。相 应地，终端设备应用CHO候选小区1的配置时，可以基于CHO候选小区1的配置中包含的添加/变更条件，对CHO候选小区1关联的CPAC候选小区进行评估。
又例如，若CHO候选小区1中包含第一信息，第一信息用于指示停止对第二候选小区进行评估。相应地，终端设备可以应用CHO候选小区1的配置时，停止对CHO候选小区1关联的CPAC候选小区进行评估。之后，如果终端设备接收到CHO候选小区1发送的用于更新/配置CPAC评估条件的RRC消息后，可以重新开始对CPAC候选小区的评估。
在一些实现方式中，若第一信息指示停止对第二候选小区进行评估，第一信息还用于确定释放或保留第二候选小区的CPAC配置。当然，在本申请实施例中，用于确定释放或保留第二候选小区的CPAC配置的信息，还可以是除第一信息之外的其他信息。
在本申请实施例中，对基于第一信息确定释放或保留第二候选小区的CPAC配置的方式不作限定。例如，若存在第一信息，则可以确定保留第二候选小区的CPAC配置。又例如，若不存在第一信息，则可以确定释放第二候选小区的CPAC配置。又例如，第一信息可以用于指示释放或保留第二候选小区的CPAC配置。
例如，若CHO候选小区1中包含第一信息，第一信息用于指示停止对CHO候选小区1关联的CPAC候选小区进行评估。相应地，终端设备应用CHO候选小区1的配置时，可以保留CHO候选小区1关联的CPAC候选小区的配置(例如，第一UE变量中与CPAC候选小区相关的执行条件配置，和/或，第二UE变量中CPAC候选小区配置)。
又例如，若目标CHO候选小区配置中不包含第一指示信息，第一信息用于指示停止对CHO候选小区1关联的CPAC候选小区进行评估。相应地，终端设备应用CHO候选小区1的配置，并释放CPAC配置(例如，第一UE变量中与CPAC候选小区相关的执行条件配置，和/或，第二UE变量中CPAC候选小区配置)。
示例2，终端设备可以基于第一信息，确定对第二候选小区进行评估或停止对第二候选小区进行评估，其中，第一信息用于确定与第一候选小区关联的CPAC候选小区的条件(包括第二候选小区的条件)的有效性。
在一些实现方式中，上述CPAC候选小区的条件的有效性，可以基于配置CPAC候选小区的条件的节点确定。也即是说，第一信息用于指示与配置CPAC候选小区的条件的节点，节点包括源MN、源SN、候选MN以及候选SN中的一种或多种。
在一些实现方式中，若第一信息指示节点为源MN，则终端设备停止对CPAC候选小区进行评估。也即是说，在CPAC候选小区的条件由源MN配置的情况下，若终端设备切换至第一候选小区(即发生了主小区变化后)，则CPAC候选小区的条件失效，终端设备可以停止对CPAC候选小区的评估。
在本申请实施例中，若CPAC候选小区的条件由源MN配置，CPAC候选小区的条件关联MCG测量配置(MCG measurement configuration)。
在一些实现方式中，若第一信息指示节点为候选MN，且终端设备切换至候选MN，则终端设备对CPAC候选小区进行评估。也即是说，在CPAC候选小区的条件由候选MN配置的情况下，若终端设备切换至候选MN，则CPAC候选小区的条件有效，终端设备可以继续对CPAC候选小区的评估。
在一些实现方式中，若第一信息指示节点为源SN，且终端设备切换至第一候选小区并保留源SN，则终端设备对CPAC候选小区进行评估。也即是说，在CPAC候选小区的条件由源SN配置的情况下，若终端设备切换至候选MN，且保留源SN，则CPAC候选小区的条件有效，终端设备可以继续对CPAC候选小区的评估。
在一些实现方式中，若第一信息指示节点为源SN，且终端设备切换至第一候选小区并释放源SCG(或者说SCG发生了切换)，则终端设备停止对CPAC候选小区进行评估。也即是说，在CPAC候选小区的条件由源SN配置的情况下，若终端设备切换至候选MN，且释放了源SN，则CPAC候选小区的条件无效，终端设备可以停止对CPAC候选小区的评估。
在一些实现方式中，若第一信息指示节点为候选SN(又称“目标SN”)，则终端设备对CPAC候选小区进行评估。也即是说，在CPAC候选小区的条件由候选SN配置的情况下，若终端设备切换至候选SN，则CPAC候选小区的条件有效，终端设备可以继续对CPAC候选小区的评估。
示例3，终端设备可以基于第一信息，确定对第二候选小区进行评估或停止对第二候选小区进行评估，其中，第一信息用于指示触发基于第二候选小区的CPAC的节点，节点包括源MN、源SN以及候选MN中的一种或多种。
在一些实现方式中，若第一信息指示节点为源MN，则终端设备停止对CPAC候选小区进行评估。也即是说，在CPAC由源MN触发的情况下，若终端设备切换至第一候选小区(即发生了主小区变化后)，则终端设备可以停止对CPAC候选小区的评估。
在一些实现方式中，若第一信息指示节点为候选MN，且终端设备切换至候选MN，则终端设备对CPAC候选小区进行评估。也即是说，在CPAC由候选MN触发的情况下，若终端设备切换至候选MN，则终端设备可以继续对CPAC候选小区的评估。否则，终端设备停止对CPAC候选小区的评估。
在一些实现方式中，若第一信息指示节点为源SN，且终端设备切换至第一候选小区并保留源SN，则终端设备对CPAC候选小区进行评估。也即是说，在CPAC由源SN配置的情况下，若终端设备切换至候选MN且保留源SN，则终端设备可以继续对CPAC候选小区的评估。否则，终端设备停止对CPAC候选小区的评估。
在一些实现方式中，若第一信息指示节点为源SN，且终端设备切换至第一候选小区并释放源SN(或者说SCG发生了切换)，则终端设备停止对CPAC候选小区进行评估。也即是说，在CPAC由源SN触发的情况下，若终端设备切换至候选MN且释放了源SN，则终端设备可以停止对CPAC候选小区的评估。
在本申请实施例中，上述终端设备可以停止对CPAC候选小区的评估，可以包括终端设备停止对CPAC候选小区的评估，直到确定新的CPAC执行条件，或者说，在确定新的CPAC执行条件前不执行CPCA候选小区的评估。
需要说明的是，在本申请实施例中，若终端设备停止对CPAC候选小区的评估，此时，终端设备可以保留CPAC候选小区的条件，以便下次对CPAC候选小区进行评估，以减少传输CPAC候选小区的条件所需的传输开销。当然，在本申请实施例中，若终端设备停止对CPAC候选小区的评估，则终端设备可以丢弃CPAC候选小区的条件。
另外，在本申请实施例中，若终端设备停止对CPAC候选小区的评估，可以基于指示信息的指示，重新开始对CPAC候选小区的评估。其中，指示信息例如可以是用于更新/配置CPAC评估条件的消息(例如，RRC消息)。
在一些实现方式中，若SCG发生了切换，终端设备在确定新的CPAC执行条件前，可以不执行CPAC候选小区的评估，其中，新的CPAC执行条件可以包括候选SCG或目标为终端设备配置新的评估条件。
在一些实现方式中，若终端设备不执行CPAC候选小区的评估，终端设备可以释放CPAC配置。当然，在本申请实施例中，若终端设备不执行CPAC候选小区的评估，终端设备可以保留CPAC配置。
实施例5，第一操作包括对第一候选小区进行评估或停止对第一候选小区进行评估。
目前，终端设备接入第一候选小区和/或第二候选小区后，如果持续对第一候选小区进行评估，可能会导致终端设备的功耗增大。如果停止对第一候选小区进行评估，可能会导致终端设备与网络设备的通信可靠性降低。因此，针对上述问题，本申请实施例还提供了一种判断方式。
在一些实现方式中，终端设备可以基于第一信息，确定对第一候选小区进行评估或停止对第一候选小区进行评估，或者说，第一信息用于指示终端设备对第一候选小区进行评估或者停止对第一候选小区评估，此时第一信息又可以称为“第一指示信息”。也即是说，可以通过第一信息，以显示信令的方式指示终端设备对第一候选小区进行评估或停止对第一候选小区进行评估。
在本申请实施例中，对第一信息的承载方式不作限定。在一些实现方式中，第一信息可以承载于第一候选小区的配置信息中。当然，在本申请实施例中，上述第一信息还可以是单独传输的信息。
需要说明的是，在本申请实施例中，上述第一候选小区属于CHO候选小区，相应地，对第一候选小区进行评估可以替换为对CHO候选小区进行评估，停止对第一候选小区的评估可以替换为停止对CHO候选小区进行评估。
实施例6，第一操作包括驻留在源小区。
在一些场景中，源小区的信号质量可能较好，例如，源小区的信号质量高于门限，此时，终端设备可以执行上述第一操作，即驻留在源小区，以避免不必要的切换。
在另一些场景中，第一候选小区的信号质量可能较差，例如，第一候选小区的信号质量低于门限，此时，终端设备可以执行上述第一操作，即驻留在源小区，以避免不必要的切换。
在一些实现方式中，上述第一操作的执行时间可以基于第三定时器确定。例如，第一操作在第三定时器停止后执行。又例如，第一操作的执行时间可以为第三定时器的停止时间。
在一些实现方式中，上述第三定时器的停止条件可以与第一候选小区的信号质量和/或源小区的信号质量关联。以第一候选小区的信号质量为例，停止条件可以包括第一候选小区信号质量低于门限。以源小区的信号质量为例，停止条件可以包括源小区信号质量高于门限。
需要说明的是，在本申请实施例中，为了提高执行第一操作的准确性，停止条件可以基于第一候选小区的信号质量和源小区的信号质量关联。例如，停止条件可以包括第一候选小区信号质量低于第一门限，且停止条件可以包括源小区信号质量高于第二门限。其中，第一门限和第二门限可以是相同的门限， 也可以是不同的门限，本申请实施例对此不作限定。
在一些实现方式中，第三定时器的启动条件可以与第一定时器的启动条件相同。在一些实现方式中，第三定时器的启动条件或重启条件包括第一候选小区的条件满足，也即是说，响应于满足第一候选小区的条件，终端设备启动或重启第三定时器。
在另一些实现方式中，第一定时器的重启条件包括在第三定时器运行期间第三候选小区的条件满足，其中，第三候选小区为除第一候选小区之外的其他基于CHO的候选小区(又称“其他CHO候选小区”)。本申请实施例中，对第三候选小区的数量不作限定，第三候选小区可以包括一个或多个CHO候选小区。
例如，响应于满足CHO候选小区1的条件，终端设备启动第三定时器，并在第三定时器的运行期间对其他CHO候选小区进行评估，此时，如果满足CHO候选小区2的条件，终端设备可以重启第三定时器。
需要说明的是，上述各个实施例之间可以单独使用，也可以相互结合使用。例如，实施例3可以与实施例1相互结合使用，基于实施例3的介绍若终端设备释放SCG，则终端设备可以基于实施例1的方案确定接入第一候选小区的时机。
场景2，若满足第二候选小区的条件的时间与满足第一候选小区的条件的时间不同。下文为了便于描述，将满足第二候选小区的条件的时间称为“时间1”，将满足第一候选小区的条件的时间称为“时间2”。
在本申请实施例中，对时间1与时间2之间的先后关系不作限定，例如，时间1可以早于时间2，也即是说，在满足第一候选小区的条件的时间之前，已经有第二候选小区的条件被满足。例如，时间1可以晚于时间2，也即是说，在满足第二候选小区的条件的时间之前，已经有第一候选小区的条件被满足。
另外，关于第一候选小区，第二候选小区，第一候选小区与第二候选小区之间的关系，第一候选小区的条件，第二候选小区的条件等属于的相关介绍，可以参见上文场景1中的相关介绍，使用相同术语对应的介绍相似。为了简洁，在此不再赘述。
在一些实现方式中，在上述场景2下，终端设备在第二时间接入第一候选小区。其中，第二时间可以基于满足第一候选小区的条件的时间(即时间2)确定。
上述第二时间基于时间2确定可以理解为，第二时间可以为位于时间2之后的一段时间，或者，第二时间可以等于时间2。也即是说，终端设备接入第一候选小区的时间可以晚于满足第一候选小区的条件的时间，或者说，终端设备接入第一候选小区的时间可以定于满足第一候选小区的条件的时间。
上述终端设备在第二时间接入第一候选小区，可替换为，响应于第一候选小区的条件满足，终端设备接入第一候选小区。以时间1早于时间2为例，在第二候选小区的条件满足的情况下，响应于第一候选小区的条件满足，终端设备接入第一候选小区。
在本申请实施例中，对上述满足第一候选小区的条件不作限定。在一些实现方式中，上述满足第一候选小区的条件可以理解为，经过对第一候选小区的条件进行放松后，第一候选小区的条件被满足，或者说，满足放松后第一候选小区的条件，或者说，经过对第一候选小区的测量进行放松后，满足第一候选小区的条件。相应地，上述满足第一候选小区的条件的时间可以基于满足放松后第一候选小区的条件对应的时间确定。换句话说，响应于放松后第一候选小区的条件满足，终端设备接入第一候选小区。
在一些实现方式中，终端设备通常会监测第一候选小区的信道条件，来确定是否满足第一候选小区的条件，且只有在预定义时间段(例如，触发时间TTT)内都满足的情况下，终端设备才可以接入第一候选小区，相应地，在本申请实施例中，对第一候选小区的测量进行放松，可以包括跳过在预定义时间段测量第一候选小区的信道条件，或者说，不需要在预定义时间段测量第一候选小区的信道条件，或者说，将上述预定义时间段的时长调整为0。
当然，在本申请实施例中，上述对第一候选小区的测量进行放松，还可以包括缩短预定义时间段的时长，例如，对第一候选小区的测量进行放松后，第一候选小区关联的TTT的时长小于第一候选小区关联的原始TTT，其中，原始TTT是对第一候选小区的测量进行放松前的TTT。
例如，CHO候选小区1与CPAC候选小区1关联，若CHO候选小区1满足接入条件(entering condition)，则在CHO候选小区1对应的TTT3内需要对CHO候选小区1持续测量，以确定在TTT3内CHO候选小区1满足条件，只有在TTT3内CHO候选小区1满足条件，才可以认为CHO候选小区1满足条件。
而采用本申请实施例的方案，可以对CHO候选小区1的条件进行放松，在CHO候选小区1满足接入条件的情况下，无需确定在TTT3内CHO候选小区1的条件是否满足，即可以直接接入CHO候选小区1的条件。
又例如，在第二候选小区满足条件后，终端设备可以对第一候选小区进行评估，若第一候选小区满足接入条件，则认为第一候选小区的条件满足。
在另一些实现方式中，第一候选小区的条件可以与门限关联。相应地，放松后的第一候选小区的条件可以包括减小门限。
以第一候选小区的条件包括第一候选小区的测量结果大于门限值1，则满足第一候选小区的条件。相应地，在本申请实施例中，放松后的第一候选小区的条件用于指示第一候选小区的测量结果大于门限值2，则满足第一候选小区的条件，其中，门限值1大于门限值2。
当然，在本申请实施例中，还可以通过其他方式对第一候选小区的条件进行放松。在一些实现方式中，可以通过调整第一候选小区的测量结果来放松第一候选小区的条件。例如，第一候选小区的条件包括第一候选小区的测量结果与预设参数1之间的差值大于门限值，则满足第一候选小区的条件。相应地，在本申请实施例中，放松后的第一候选小区的条件用于指示第一候选小区的测量结果与预设参数2大于门限值，则满足第一候选小区的条件，其中，预设参数1大于预设参数2。
在本申请实施例中，对预设参数的调整方式不作限定。除了上文介绍的，通过减小预设参数来放松第一候选小区的条件之外，在一些实现方式中，还可以通过增大预设参数，来放松第一候选小区的条件。例如，若第一候选小区的条件包括事件A3(CondEvent A3)，则可以通过增大预设参数的方式，来对第一候选小区的条件进行放松。
需要说明的是，在本申请实施例中，终端设备接入第一候选小区时还可以接入第二候选小区，即执行针对第一候选小区的CHO以及针对第二候选小区的CPAC。当然，终端设备也可以不接入第二候选小区。
在一些实现方式中，上述第二时间与第二定时器关联，在一些实现方式中，第二定时器的停止时间可以为第二时间，或者，第二时间可以为第二定时器停止后的某一时间。
在一些实现方式中，第二定时器用于指示对第一候选小区进行评估的时长，也即是说，在第二定时器的运行期间，可以基于放松后的第一候选小区的条件对第一候选小区进行评估。
在本申请实施例中，对第二定时器的启动条件不作限定。在一些实现方式中，第二定时器的启动条件包括以下一种或多种：第一候选小区的条件满足；第二候选小区的条件满足；第一候选小区关联的第五候选小区的条件不满足；第二候选小区关联的第四候选小区的条件不满足。
以启动条件包括第一候选小区的条件满足为例，也即是说，响应于满足第一候选小区的条件，终端设备启动第二定时器。
以启动条件包括第二候选小区的条件满足为例，也即是说，响应于满足第二候选小区的条件，终端设备启动第二定时器。
以启动条件包括第一候选小区关联的第五候选小区的条件不满足为例，其中，第五候选小区为CPAC候选小区，例如，第五候选小区可以包括第二候选小区。也即是说，响应于不满足第五候选小区的条件，终端设备启动第二定时器。
在本申请实施例中，对第五候选小区的数量不作限定，第五候选小区可以包括一个或多个CPAC候选小区。
以启动条件包括第二候选小区关联的第四候选小区的条件不满足为例，其中，第四候选小区为CHO候选小区，例如，第四候选小区可以包括第一候选小区。也即是说，响应于不满足第四候选小区的条件，终端设备启动第二定时器。
在本申请实施例中，对第四候选小区的数量不作限定，第四候选小区可以包括一个或多个CHO候选小区。
在本申请实施例中，对第二定时器的停止条件不作限定。在一些实现方式中，第二定时器的停止条件包括第一候选小区的条件满足和/或第二候选小区的条件满足。例如，第二定时器的停止条件可以包括第一候选小区满足条件，且第一候选小区关联的第二候选小区满足条件。
在一些实现方式中，若第二定时器超时，上述方法还包括：终端设备执行以下一种或多种操作：终端设备针对第一候选小区的CHO；对终端设备的候选小区重新开始评估；针对目标候选小区以及目标候选小区关联的其他候选小区，执行CHO以及CPAC；针对目标候选小区以及目标候选小区关联的其他候选小区，执行CHO以及CPAC，目标候选小区对应的用于CPAC的条件满足。
以操作包括针对第一候选小区执行CHO为例，若第二定时器超时，终端设备可以仅执行针对第一候选小区的CHO。
以操作包括对终端设备的候选小区重新开始评估为例，若第二定时器超时，终端设备可以重新开始评估部分或全部候选小区。其中，候选小区可以包括CHO候选小区和/或CPAC候选小区，其中，CHO候选小区可以包括第一候选小区，CPAC候选小区可以包括第二候选小区。
另外，对候选小区进行评估可以包括评估候选小区关联的条件切换事件和/或CPAC条件是否满足，或者说，对候选小区进行评估可以包括终端设备执行候选小区关联的条件切换事件评估任务和/或候选小区关联的CPAC条件评估任务。
以操作包括针对目标候选小区以及目标候选小区关联的其他候选小区，执行CHO以及CPAC为例，其中，目标候选小区对应的用于CHO的条件满足。也即是说，终端设备可以选择满足条件的CHO候选小区，并针对该CHO候选小区以及该CHO候选小区关联的CPAC候选小区，执行CHO以及CPAC。
需要说明的是，在本申请实施例中，对终端设备选择满足条件的CHO候选小区的方式不作限定。例如，终端设备可以基于预设规则选择满足条件的CHO候选小区，其中预设规则用于指示选择信号质量最好的CHO候选小区，有助于提高终端设备与网络设备之间的通信质量。又例如，终端设备可以随机选择满足条件的CHO候选小区，以简化终端设备选择满足条件的CHO候选小区的复杂度。
以操作包括针对目标候选小区以及目标候选小区关联的其他候选小区，执行CHO以及CPAC为例，其中，目标候选小区对应的用于CPAC的条件满足。也即是说，终端设备可以选择满足条件的CPAC候选小区，并针对该CPAC候选小区以及该CPAC候选小区关联的CHO候选小区，执行CHO以及CPAC。
需要说明的是，在本申请实施例中，对终端设备选择满足条件的CPAC候选小区的方式不作限定。例如，终端设备可以基于预设规则选择满足条件的CPAC候选小区，其中预设规则用于指示选择信号质量最好的CPAC候选小区，有助于提高终端设备与网络设备之间的通信质量。又例如，终端设备可以随机选择满足条件的CPAC候选小区，以简化终端设备选择满足条件的CPAC候选小区的复杂度。
需要说明的是，在上文的介绍中，对第一候选小区进行评估可以包括评估第一候选小区关联的条件切换事件是否满足，或者说，对第一候选小区进行评估可以包括终端设备执行第一候选小区关联的条件切换事件评估任务。
另外，对第二候选小区进行评估可以包括评估第二候选小区关联的CPAC条件是否满足，或者说，对第二候选小区进行评估可以包括终端设备执行第二候选小区关联的CPAC条件评估任务。
需要说明的是，在本申请实施例中，上述CHO候选小区可以包括第一候选小区，上述CHO候选小区可以为终端设备的CHO候选小区中除第一候选小区之外的其他CHO候选小区。
在本申请实施例中，上述CPAC候选小区可以包括第二候选小区，上述CPAC候选小区可以为终端设备的CPAC候选小区中除第二候选小区之外的其他CPAC候选小区。
上文结合图1至图4，详细描述了本申请的方法实施例，下面结合图5至图7，详细描述本申请的装置实施例。应理解，方法实施例的描述与装置实施例的描述相互对应，因此，未详细描述的部分可以参见前面方法实施例。
图5是本申请实施例的终端设备的示意图。图5所述的终端设备500包括处理单元510。
若第一候选小区的条件满足，且第二候选小区的条件不满足，处理单元510，用于执行第一操作；其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联；其中，所述第一操作包括以下中的一种或多种：在第一时间接入所述第一候选小区；接入第一候选小区；释放或保留服务辅小区组SCG；对所述第二候选小区进行评估；停止对所述第二候选小区进行评估；对所述第一候选小区进行评估；停止对所述第一候选小区进行评估；以及驻留在源小区。
在一种可能的实现方式中，若所述第一操作包括在所述第一时间接入所述第一候选小区，所述第一时间基于满足所述第二候选小区的条件的时间确定；或所述第一时间与满足所述第二候选小区的条件的时间无关。
在一种可能的实现方式中，若所述第一时间基于满足所述第二候选小区的条件的时间确定，满足所述第二候选小区的条件的时间基于满足所述第二候选小区的目标条件的时间确定，所述目标条件为对所述第二候选小区的条件进行放松得到的。
在一种可能的实现方式中，若所述第一操作包括在所述第一时间接入所述第一候选小区，所述第一时间与第一定时器关联，所述第一定时器用于指示对所述第二候选小区进行评估的时长。
在一种可能的实现方式中，所述第一定时器的启动条件包括所述第一候选小区的条件满足。
在一种可能的实现方式中，所述第一定时器的重启条件包括在所述第一定时器运行期间第三候选小区的条件满足，所述第三候选小区为除第一候选小区之外的其他基于CHO的候选小区。
在一种可能的实现方式中，所述第一定时器的停止条件包括以下一种或多种：所述第二候选小区的条件满足；所述终端设备的源小区的测量结果低于门限；所述终端设备的源小区发生无线链路失败RLF；以及与RLF相关的定时器启动。
在一种可能的实现方式中，若所述第一时间为所述第一定时器停止之后的时间，则在所述第一时间接入所述第一候选小区包括在所述第一时间仅接入所述第一候选小区。
在一种可能的实现方式中，所述处理单元还用于：若所述第一定时器超时，释放SCG。
在一种可能的实现方式中，若所述第一操作包括保留服务SCG，所述服务SCG属于候选SCG列表。
在一种可能的实现方式中，所述服务SCG的条件用于执行基于所述服务SCG的CPC，所述处理单元还用于：若所述服务SCG的条件不满足，设置所述服务SCG为去激活态；和/或若所述服务SCG的条件满足，设置所述服务SCG为激活态。
在一种可能的实现方式中，若所述第一操作包括释放服务SCG，所述服务SCG不属于候选SCG列表。
在一种可能的实现方式中，若所述第一操作包括对所述第二候选小区进行评估或停止对所述第二候选小区进行评估，所述处理单元还用于：基于第一信息，确定对所述第二候选小区进行评估或停止对所述第二候选小区进行评估。
在一种可能的实现方式中，所述第一信息用于指示对所述第二候选小区进行评估或停止对所述第二候选小区进行评估。
在一种可能的实现方式中，若所述第一信息指示停止对所述第二候选小区进行评估，所述第一信息还用于确定释放或保留所述第二候选小区的CPAC配置。
在一种可能的实现方式中，所述第一信息用于指示与配置所述第二候选小区的条件的节点，所述节点包括源MN、源SN、候选MN以及候选SN中的一种或多种。
在一种可能的实现方式中，若所述第一信息指示所述节点为所述源MN，则所述终端设备停止对所述第二候选小区进行评估；和/或若所述第一信息指示所述节点为所述候选MN，且所述终端设备切换至所述候选MN，则所述终端设备对所述第二候选小区进行评估；和/或若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并保留所述源SN，则所述终端设备对所述第二候选小区进行评估；和/或若所述第一信息指示所述节点为所述候选SN，则所述终端设备对所述第二候选小区进行评估。
在一种可能的实现方式中，所述第一信息用于指示用于触发所述第二候选小区关联的CPAC的节点，所述节点包括源MN、源SN以及候选MN中的一种或多种。
在一种可能的实现方式中，若所述第一信息指示所述节点为所述源MN，则所述终端设备停止对所述第二候选小区进行评估；和/或若所述第一信息指示所述节点为所述候选MN，且所述终端设备切换至所述候选MN，则所述终端设备对所述第二候选小区进行评估；和/或若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并保留所述源SN，则所述终端设备对所述第二候选小区进行评估；和/或若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并释放所述源SN，则所述终端设备停止对所述第二候选小区进行评估。
在一种可能的实现方式中，若第一操作包括驻留在源小区，且所述第一操作在第三定时器停止后执行，所述第三定时器的停止条件包括：所述第一候选小区信号质量低于门限；和/或所述终端设备的源小区信号质量高于门限。
图6是本申请实施例中的终端设备的示意图，图6所示的终端设备600包括：处理单元610。
若满足第二候选小区的条件的时间与满足第一候选小区的条件的时间不同，则处理单元610用于在第二时间接入所述第一候选小区；其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联。
在一种可能的实现方式中，所述第二时间基于满足所述第一候选小区的条件的时间确定。
在一种可能的实现方式中，所述满足所述第一候选小区的条件的时间基于满足所述第一候选小区的目标条件的时间确定，所述目标条件为对所述第一候选小区的条件进行放松得到的。
在一种可能的实现方式中，所述第二时间与第二定时器关联，所述第二定时器用于指示对所述第一候选小区进行评估的时长。
在一种可能的实现方式中，所述第二定时器的启动条件包括以下一种或多种：所述第一候选小区的条件满足；所述第二候选小区的条件满足；所述第一候选小区关联的第五候选小区的条件不满足，所述第五候选小区为CPAC候选小区；所述第二候选小区关联的第四候选小区的条件不满足，所述第四候选小区为CHO候选小区。
在一种可能的实现方式中，所述第二定时器的停止条件包括所述第一候选小区的条件满足或第二候选小区的条件满足。
在一种可能的实现方式中，所述第二时间为所述第二定时器停止后的时间。
在一种可能的实现方式中，若所述第二定时器超时，所述处理单元还用于：所述终端设备执行以下一种或多种操作：针对所述第一候选小区的CHO；对所述终端设备的候选小区重新开始评估；针对目标候选小区以及所述目标候选小区关联的其他候选小区，执行CHO以及CPAC，所述目标候选小区对应的用于CHO的条件满足；针对目标候选小区以及所述目标候选小区关联的其他候选小区，执行CHO以及CPAC，所述目标候选小区对应的用于CPAC的条件满足。
在可选的实施例中，处理单元510可以为处理器710。终端设备500还可以包括收发器730和存储器720，具体如图7所示。
在可选的实施例中，处理单元610可以为处理器710。终端设备600还可以包括收发器730和存储器720，具体如图7所示。
图7是本申请实施例的通信装置的示意性结构图。图7中的虚线表示该单元或模块为可选的。该装置700可用于实现上述方法实施例中描述的方法。装置700可以是芯片、终端设备或网络设备。
装置700可以包括一个或多个处理器710。该处理器710可支持装置700实现前文方法实施例所描述的方法。该处理器710可以是通用处理器或者专用处理器。例如，该处理器可以为中央处理单元(central processing unit，CPU)。或者，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
装置700还可以包括一个或多个存储器720。存储器720上存储有程序，该程序可以被处理器710执行，使得处理器710执行前文方法实施例所描述的方法。存储器720可以独立于处理器710也可以集成在处理器710中。
装置700还可以包括收发器730。处理器710可以通过收发器730与其他设备或芯片进行通信。例如，处理器710可以通过收发器730与其他设备或芯片进行数据收发。
本申请实施例还提供一种计算机可读存储介质，用于存储程序。该计算机可读存储介质可应用于本申请实施例提供的终端或网络设备中，并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序产品。该计算机程序产品包括程序。该计算机程序产品可应用于本申请实施例提供的终端或网络设备中，并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序。该计算机程序可应用于本申请实施例提供的终端或网络设备中，并且该计算机程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
应理解，本申请中术语“系统”和“网络”可以被可互换使用。另外，本申请使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。
在本申请的实施例中，提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
在本申请实施例中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
本申请实施例中，“预定义”或“预配置”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中，所述“协议”可以指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
本申请实施例中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式 实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够读取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，数字通用光盘(digital video disc，DVD))或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (62)

  1. 一种用于无线通信的方法，其特征在于，包括：
    若第一候选小区的条件满足，且第二候选小区的条件不满足，终端设备执行第一操作；
    其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联；
    其中，所述第一操作包括以下中的一种或多种：
    在第一时间接入所述第一候选小区；
    接入第一候选小区；
    释放或保留服务辅小区组SCG；
    对所述第二候选小区进行评估；
    停止对所述第二候选小区进行评估；
    对所述第一候选小区进行评估；
    停止对所述第一候选小区进行评估；以及
    驻留在源小区。
  2. 如权利要求1所述的方法，其特征在于，若所述第一操作包括在所述第一时间接入所述第一候选小区，所述第一时间基于满足所述第二候选小区的条件的时间确定；或
    所述第一时间与满足所述第二候选小区的条件的时间无关。
  3. 如权利要求2所述的方法，其特征在于，若所述第一时间基于满足所述第二候选小区的条件的时间确定，满足所述第二候选小区的条件的时间基于满足所述第二候选小区的目标条件的时间确定，所述目标条件为对所述第二候选小区的条件进行放松得到的。
  4. 如权利要求1所述的方法，其特征在于，若所述第一操作包括在所述第一时间接入所述第一候选小区，所述第一时间与第一定时器关联，所述第一定时器用于指示对所述第二候选小区进行评估的时长。
  5. 如权利要求4所述的方法，其特征在于，所述第一定时器的启动条件包括所述第一候选小区的条件满足。
  6. 如权利要求4或5所述的方法，其特征在于，所述第一定时器的重启条件包括在所述第一定时器运行期间第三候选小区的条件满足，所述第三候选小区为除第一候选小区之外的其他基于CHO的候选小区。
  7. 如权利要求4-6中任一项所述的方法，其特征在于，所述第一定时器的停止条件包括以下一种或多种：
    所述第二候选小区的条件满足；
    所述终端设备的源小区的测量结果低于门限；
    所述终端设备的源小区发生无线链路失败RLF；以及
    与RLF相关的定时器启动。
  8. 如权利要求4-7中任一项所述的方法，其特征在于，若所述第一时间为所述第一定时器停止之后的时间，则在所述第一时间接入所述第一候选小区包括在所述第一时间仅接入所述第一候选小区。
  9. 如权利要求4-7中任一项所述的方法，其特征在于，所述方法还包括：
    若所述第一定时器超时，所述终端设备释放SCG。
  10. 如权利要求1所述的方法，其特征在于，若所述第一操作包括保留服务SCG，所述服务SCG属于候选SCG列表。
  11. 如权利要求10所述的方法，其特征在于，所述服务SCG的条件用于执行基于所述服务SCG的CPC，所述方法还包括：
    若所述服务SCG的条件不满足，所述终端设备设置所述服务SCG为去激活态；和/或
    若所述服务SCG的条件满足，所述终端设备设置所述服务SCG为激活态。
  12. 如权利要求1所述的方法，其特征在于，若所述第一操作包括释放服务SCG，所述服务SCG不属于候选SCG列表。
  13. 如权利要求1所述的方法，其特征在于，若所述第一操作包括对所述第二候选小区进行评估或停止对所述第二候选小区进行评估，所述方法还包括：
    所述终端设备基于第一信息，确定对所述第二候选小区进行评估或停止对所述第二候选小区进行评估。
  14. 如权利要求13所述的方法，其特征在于，所述第一信息用于指示对所述第二候选小区进行评 估或停止对所述第二候选小区进行评估。
  15. 如权利要求14所述的方法，其特征在于，若所述第一信息指示停止对所述第二候选小区进行评估，所述第一信息还用于确定释放或保留所述第二候选小区的CPAC配置。
  16. 如权利要求13所述的方法，其特征在于，所述第一信息用于指示与配置所述第二候选小区的条件的节点，所述节点包括源MN、源SN、候选MN以及候选SN中的一种或多种。
  17. 如权利要求16所述的方法，其特征在于，若所述第一信息指示所述节点为所述源MN，则所述终端设备停止对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述候选MN，且所述终端设备切换至所述候选MN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并保留所述源SN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述候选SN，则所述终端设备对所述第二候选小区进行评估。
  18. 如权利要求13所述的方法，其特征在于，所述第一信息用于指示用于触发所述第二候选小区关联的CPAC的节点，所述节点包括源MN、源SN以及候选MN中的一种或多种。
  19. 如权利要求18所述的方法，其特征在于，若所述第一信息指示所述节点为所述源MN，则所述终端设备停止对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述候选MN，且所述终端设备切换至所述候选MN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并保留所述源SN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并释放所述源SN，则所述终端设备停止对所述第二候选小区进行评估。
  20. 如权利要求1所述的方法，其特征在于，若第一操作包括驻留在源小区，且所述第一操作在第三定时器停止后执行，所述第三定时器的停止条件包括：所述第一候选小区信号质量低于门限；和/或
    所述终端设备的源小区信号质量高于门限。
  21. 一种用于无线通信的方法，其特征在于，包括：
    若满足第二候选小区的条件的时间与满足第一候选小区的条件的时间不同，则终端设备在第二时间接入所述第一候选小区；
    其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联。
  22. 如权利要求21所述的方法，其特征在于，所述第二时间基于满足所述第一候选小区的条件的时间确定。
  23. 如权利要求22所述的方法，其特征在于，所述满足所述第一候选小区的条件的时间基于满足所述第一候选小区的目标条件的时间确定，所述目标条件为对所述第一候选小区的条件进行放松得到的。
  24. 如权利要求21所述的方法，其特征在于，所述第二时间与第二定时器关联，所述第二定时器用于指示对所述第一候选小区进行评估的时长。
  25. 如权利要求24所述的方法，其特征在于，所述第二定时器的启动条件包括以下一种或多种：
    所述第一候选小区的条件满足；
    所述第二候选小区的条件满足；
    所述第一候选小区关联的第五候选小区的条件不满足，所述第五候选小区为CPAC候选小区；
    所述第二候选小区关联的第四候选小区的条件不满足，所述第四候选小区为CHO候选小区。
  26. 如权利要求24或25所述的方法，其特征在于，所述第二定时器的停止条件包括所述第一候选小区的条件满足或第二候选小区的条件满足。
  27. 如权利要求24-26中任一项所述的方法，其特征在于，所述第二时间为所述第二定时器停止后的时间。
  28. 如权利要求24-27中任一项所述的方法，其特征在于，若所述第二定时器超时，所述方法还包括：
    所述终端设备执行以下一种或多种操作：
    针对所述第一候选小区的CHO；
    对所述终端设备的候选小区重新开始评估；
    针对目标候选小区以及所述目标候选小区关联的其他候选小区，执行CHO以及CPAC，所述目标 候选小区对应的用于CHO的条件满足；
    针对目标候选小区以及所述目标候选小区关联的其他候选小区，执行CHO以及CPAC，所述目标候选小区对应的用于CPAC的条件满足。
  29. 一种终端设备，其特征在于，包括：
    若第一候选小区的条件满足，且第二候选小区的条件不满足，处理单元，用于执行第一操作；
    其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联；
    其中，所述第一操作包括以下中的一种或多种：
    在第一时间接入所述第一候选小区；
    接入第一候选小区；
    释放或保留服务辅小区组SCG；
    对所述第二候选小区进行评估；
    停止对所述第二候选小区进行评估；
    对所述第一候选小区进行评估；
    停止对所述第一候选小区进行评估；以及
    驻留在源小区。
  30. 如权利要求29所述的终端设备，其特征在于，若所述第一操作包括在所述第一时间接入所述第一候选小区，所述第一时间基于满足所述第二候选小区的条件的时间确定；或
    所述第一时间与满足所述第二候选小区的条件的时间无关。
  31. 如权利要求30所述的终端设备，其特征在于，若所述第一时间基于满足所述第二候选小区的条件的时间确定，满足所述第二候选小区的条件的时间基于满足所述第二候选小区的目标条件的时间确定，所述目标条件为对所述第二候选小区的条件进行放松得到的。
  32. 如权利要求29所述的终端设备，其特征在于，若所述第一操作包括在所述第一时间接入所述第一候选小区，所述第一时间与第一定时器关联，所述第一定时器用于指示对所述第二候选小区进行评估的时长。
  33. 如权利要求32所述的终端设备，其特征在于，所述第一定时器的启动条件包括所述第一候选小区的条件满足。
  34. 如权利要求32或33所述的终端设备，其特征在于，所述第一定时器的重启条件包括在所述第一定时器运行期间第三候选小区的条件满足，所述第三候选小区为除第一候选小区之外的其他基于CHO的候选小区。
  35. 如权利要求32-34中任一项所述的终端设备，其特征在于，所述第一定时器的停止条件包括以下一种或多种：
    所述第二候选小区的条件满足；
    所述终端设备的源小区的测量结果低于门限；
    所述终端设备的源小区发生无线链路失败RLF；以及
    与RLF相关的定时器启动。
  36. 如权利要求32-35中任一项所述的终端设备，其特征在于，若所述第一时间为所述第一定时器停止之后的时间，则在所述第一时间接入所述第一候选小区包括在所述第一时间仅接入所述第一候选小区。
  37. 如权利要求32-35中任一项所述的终端设备，其特征在于，所述处理单元还用于：
    若所述第一定时器超时，释放SCG。
  38. 如权利要求29所述的终端设备，其特征在于，若所述第一操作包括保留服务SCG，所述服务SCG属于候选SCG列表。
  39. 如权利要求38所述的终端设备，其特征在于，所述服务SCG的条件用于执行基于所述服务SCG的CPC，所述处理单元还用于：
    若所述服务SCG的条件不满足，设置所述服务SCG为去激活态；和/或
    若所述服务SCG的条件满足，设置所述服务SCG为激活态。
  40. 如权利要求29所述的终端设备，其特征在于，若所述第一操作包括释放服务SCG，所述服务SCG不属于候选SCG列表。
  41. 如权利要求29所述的终端设备，其特征在于，若所述第一操作包括对所述第二候选小区进行评估或停止对所述第二候选小区进行评估，所述处理单元还用于：
    基于第一信息，确定对所述第二候选小区进行评估或停止对所述第二候选小区进行评估。
  42. 如权利要求41所述的终端设备，其特征在于，所述第一信息用于指示对所述第二候选小区进行评估或停止对所述第二候选小区进行评估。
  43. 如权利要求42所述的终端设备，其特征在于，若所述第一信息指示停止对所述第二候选小区进行评估，所述第一信息还用于确定释放或保留所述第二候选小区的CPAC配置。
  44. 如权利要求41所述的终端设备，其特征在于，所述第一信息用于指示与配置所述第二候选小区的条件的节点，所述节点包括源MN、源SN、候选MN以及候选SN中的一种或多种。
  45. 如权利要求44所述的终端设备，其特征在于，若所述第一信息指示所述节点为所述源MN，则所述终端设备停止对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述候选MN，且所述终端设备切换至所述候选MN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并保留所述源SN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述候选SN，则所述终端设备对所述第二候选小区进行评估。
  46. 如权利要求41所述的终端设备，其特征在于，所述第一信息用于指示用于触发所述第二候选小区关联的CPAC的节点，所述节点包括源MN、源SN以及候选MN中的一种或多种。
  47. 如权利要求46所述的终端设备，其特征在于，若所述第一信息指示所述节点为所述源MN，则所述终端设备停止对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述候选MN，且所述终端设备切换至所述候选MN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并保留所述源SN，则所述终端设备对所述第二候选小区进行评估；和/或
    若所述第一信息指示所述节点为所述源SN，且所述终端设备切换至所述第一候选小区并释放所述源SN，则所述终端设备停止对所述第二候选小区进行评估。
  48. 如权利要求29所述的终端设备，其特征在于，若第一操作包括驻留在源小区，且所述第一操作在第三定时器停止后执行，所述第三定时器的停止条件包括：所述第一候选小区信号质量低于门限；和/或
    所述终端设备的源小区信号质量高于门限。
  49. 一种终端设备，其特征在于，包括：
    若满足第二候选小区的条件的时间与满足第一候选小区的条件的时间不同，则处理单元用于在第二时间接入所述第一候选小区；
    其中，所述第一候选小区为条件切换CHO候选小区，所述第二候选小区为条件主辅小区添加/变更CPAC候选小区，所述第一候选小区与所述第二候选小区关联。
  50. 如权利要求49所述的终端设备，其特征在于，所述第二时间基于满足所述第一候选小区的条件的时间确定。
  51. 如权利要求50所述的终端设备，其特征在于，所述满足所述第一候选小区的条件的时间基于满足所述第一候选小区的目标条件的时间确定，所述目标条件为对所述第一候选小区的条件进行放松得到的。
  52. 如权利要求49所述的终端设备，其特征在于，所述第二时间与第二定时器关联，所述第二定时器用于指示对所述第一候选小区进行评估的时长。
  53. 如权利要求52所述的终端设备，其特征在于，所述第二定时器的启动条件包括以下一种或多种：
    所述第一候选小区的条件满足；
    所述第二候选小区的条件满足；
    所述第一候选小区关联的第五候选小区的条件不满足，所述第五候选小区为CPAC候选小区；
    所述第二候选小区关联的第四候选小区的条件不满足，所述第四候选小区为CHO候选小区。
  54. 如权利要求52或53所述的终端设备，其特征在于，所述第二定时器的停止条件包括所述第一候选小区的条件满足或第二候选小区的条件满足。
  55. 如权利要求52-54中任一项所述的终端设备，其特征在于，所述第二时间为所述第二定时器停止后的时间。
  56. 如权利要求52-55中任一项所述的终端设备，其特征在于，若所述第二定时器超时，所述处理单元还用于：
    所述终端设备执行以下一种或多种操作：
    针对所述第一候选小区的CHO；
    对所述终端设备的候选小区重新开始评估；
    针对目标候选小区以及所述目标候选小区关联的其他候选小区，执行CHO以及CPAC，所述目标候选小区对应的用于CHO的条件满足；
    针对目标候选小区以及所述目标候选小区关联的其他候选小区，执行CHO以及CPAC，所述目标候选小区对应的用于CPAC的条件满足。
  57. 一种终端设备，其特征在于，包括收发器、存储器和处理器，所述存储器用于存储程序，所述处理器用于调用所述存储器中的程序，并控制所述收发器接收或发送信号，以使所述终端执行如权利要求1-28中任一项所述的方法。
  58. 一种装置，其特征在于，包括处理器，用于从存储器中调用程序，以使所述装置执行如权利要求1-28中任一项所述的方法。
  59. 一种芯片，其特征在于，包括处理器，用于从存储器调用程序，使得安装有所述芯片的设备执行如权利要求1-28中任一项所述的方法。
  60. 一种计算机可读存储介质，其特征在于，其上存储有程序，所述程序使得计算机执行如权利要求1-28中任一项所述的方法。
  61. 一种计算机程序产品，其特征在于，包括程序，所述程序使得计算机执行如权利要求1-28中任一项所述的方法。
  62. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1-28中任一项所述的方法。
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