User equipment, node device, and method performed thereby

Abstract

Various embodiments of the present disclosure provide a method performed by a first node in a communication system, the method comprising: receiving a first message from a second node, the first message comprising first configuration information and / or second configuration information; and sending a second message to a user equipment (UE), the second message comprising third configuration information, the third configuration information being determined based on the first configuration information and / or the second configuration information.

Description

Technical Field

[0001] The present disclosure relates to the field of communications, and more particularly, to a method performed by a user equipment, a method performed by a first node, a method performed by a second node, a user equipment, a first node, and a second node. Background Art

[0002] To meet the increased demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Therefore, 5G or quasi-5G communication systems are also referred to as "beyond 4G networks" or "post-LTE systems."

[0003] Wireless communication is one of the most successful innovations in modern history. The number of wireless service subscribers recently surpassed 6 billion and continues to grow rapidly. Demand for wireless data services is rapidly increasing due to the growing popularity of smartphones and other mobile data devices (e.g., tablets, laptops, netbooks, e-book readers, and machine-type devices) among consumers and businesses. Improving radio interface efficiency and coverage is crucial to meeting this rapid growth and supporting new applications and deployments. Summary of the Invention

[0004] According to one aspect of the present disclosure, a method performed by a first node in a communication system is provided, the method comprising: receiving a first message from a second node, wherein the first message includes first configuration information and / or second configuration information; and sending a second message to a user equipment (UE), wherein the second message includes third configuration information, wherein the third configuration information is determined based on the first configuration information and / or the second configuration information.

[0005] According to the method provided by the present disclosure and executed by the first node in the communication system, the first configuration information, the second configuration information, and the third configuration information are related to the subsequent conditional primary and secondary cell addition or change S-CPAC.

[0006] According to the method performed by the first node in the communication system provided by the present disclosure, the first configuration information is included in a first container from the second node to the first node.

[0007] According to the method provided by the present disclosure and performed by the first node in the communication system, the first configuration information includes configuration information of one or more candidate cells, wherein the configuration information of the candidate cells includes at least one of the following: an identifier of the first candidate cell; a cell group configuration of the first candidate cell; and fourth configuration information, wherein the fourth configuration information is related to subsequent S-CPAC.

[0008] According to the method performed by the first node in the communication system provided by the present disclosure, the second configuration information is included in a second container from the second node to the first node.

[0009] According to the method provided by the present disclosure and performed by the first node in the communication system, the second configuration information includes at least one of the following: configuration information of one or more candidate cells; first execution condition information of one or more candidate cells, including execution condition information for initial S-CPAC; measurement configuration information related to the first execution condition.

[0010] According to the method provided by the present disclosure and executed by the first node in the communication system, the configuration information of the candidate cell includes at least one of the following: an identifier of the second candidate cell; a cell group configuration of the second candidate cell; and fifth configuration information, the fifth configuration information being related to the subsequent S-CPAC.

[0011] According to the method provided by the present disclosure and executed by the first node in the communication system, the third configuration information includes at least one of the following: a first conditional reconfiguration identifier, wherein the first conditional reconfiguration identifier corresponds to a candidate cell; first conditional radio resource control RRC reconfiguration information; second execution condition information, including execution condition information for initial S-CPAC; measurement configuration information related to the second execution condition; subsequent conditional reconfiguration information; wherein the subsequent conditional reconfiguration information includes at least one of the following: a second conditional reconfiguration identifier, wherein the second conditional reconfiguration identifier corresponds to a candidate cell for subsequent S-CPAC; fourth execution condition information, including execution condition information for subsequent S-CPAC.

[0012] According to the method performed by the first node in the communication system provided by the present disclosure, the first message further includes configuration format indication information.

[0013] According to the method provided by the present disclosure and executed by the first node in the communication system, the third configuration information is sent in the first format; wherein, whether the third configuration information is sent in the first format is determined based on the configuration format indication information or based on the first message including the first configuration information.

[0014] According to the method provided by the present disclosure and performed by the first node in the communication system, the first format corresponds to the first conditional configuration identifier, the first conditional RRC reconfiguration information, the second execution condition information, and the subsequent conditional reconfiguration information is included in a conditional reconfiguration information unit.

[0015] According to the method provided by the present disclosure and executed by the first node in the communication system, the fourth configuration information or the fifth configuration information includes at least one of the following: a third candidate cell identifier, used to identify the third candidate cell selected by the second node for the first candidate cell; third execution condition information; wherein, when the first candidate cell is used as the target cell, the third candidate cell and the third execution condition information are related to the subsequent S-CPAC.

[0016] According to the method provided by the present disclosure and executed by the first node in the communication system, the method further includes: sending a third message to the second node, wherein the third message includes information of one or more candidate cells and / or the number of candidate cells, wherein the information of the one or more candidate cells and / or the number of candidate cells included in the third message is determined based on the first configuration information to ensure that the number of candidate cells configured by the second node for conditional reconfiguration does not exceed the UE capability.

[0017] According to the method provided by the present disclosure and performed by the first node in the communication system, the first message also includes a measurement result, and the information of one or more candidate cells and / or the number of candidate cells included in the third message is determined based on the measurement result.

[0018] According to one aspect of the present disclosure, a method performed by a user equipment UE in a communication system is provided, the method comprising: receiving a second message from a first node, wherein the second message includes third configuration information, wherein the third configuration information is determined based on the first configuration information and / or the second configuration information included in the first message sent by the second node to the first node; based on the third configuration information, performing a subsequent conditional primary and secondary cell addition or change S-CPAC process.

[0019] According to one aspect of the present disclosure, a method performed by a second node in a communication system is provided, the method comprising: sending a first message to a first node, wherein the first message includes first configuration information, second configuration information, and / or measurement results; receiving a third message from the first node, wherein the third message includes information of one or more candidate cells and / or the number of candidate cells, wherein the information of the one or more candidate cells and / or the number of candidate cells included in the third message is determined based on the first configuration information or the measurement results to ensure that the number of candidate cells configured by the second node for conditional reconfiguration does not exceed UE capabilities.

[0020] According to the method provided by the present disclosure and executed by the second node in the communication system, the method further includes: sending a fourth message to the first node, wherein the fourth message includes the updated first configuration information and / or the updated second configuration information.

[0021] According to another aspect of the present disclosure, a user equipment (UE) is provided, comprising: a transceiver configured to transmit and receive signals to and from the outside; and a controller configured to control the transceiver to execute the method performed by the user equipment (UE).

[0022] According to another aspect of the present disclosure, a first node is provided, comprising: a transceiver configured to transmit and receive signals to and from the outside; and a controller configured to control the transceiver to execute the method executed by the first node.

[0023] According to another aspect of the present disclosure, a second node is provided, comprising: a transceiver configured to transmit and receive signals to and from the outside; and a controller configured to control the transceiver to execute the method executed by the second node.

[0024] According to another aspect of the present disclosure, a non-transitory computer-readable recording medium is provided, on which a program for executing any of the above methods when executed by a computer is stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an exemplary system architecture for System Architecture Evolution (SAE).

[0026] Figure 2 is an exemplary system architecture according to various embodiments of the present disclosure.

[0027] Figure 3 This is a schematic diagram of interaction among a user device, a first node, and a second node according to various embodiments of the present disclosure.

[0028] Figure 4 This is another schematic diagram of interaction among a user device, a first node, and a second node according to various embodiments of the present disclosure.

[0029] Figure 5 This is another schematic diagram of interaction among a user equipment, a first node, and a second node according to various embodiments of the present disclosure.

[0030] Figure 6 This is another schematic diagram of interaction among a user device, a first node, and a second node according to various embodiments of the present disclosure.

[0031] Figure 7 is a block diagram illustrating a structure of a user equipment according to an embodiment of the present disclosure.

[0032] Figure 8 is a block diagram illustrating a structure of a first node according to an embodiment of the present disclosure.

[0033] Figure 9 is a block diagram illustrating a structure of a second node according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The following description, with reference to the accompanying drawings, is provided to facilitate a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. This description includes various specific details to facilitate understanding but should be considered as illustrative only. Therefore, one of ordinary skill in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. Furthermore, descriptions of well-known functions and structures may be omitted for the sake of clarity and conciseness.

[0035] The terms and expressions used in the following description and claims are not limited to their dictionary meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purposes only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

[0036] It will be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0037] The terms "include" or "may include" refer to the presence of corresponding disclosed functions, operations, or components that can be used in various embodiments of the present disclosure, rather than limiting the presence of one or more additional functions, operations, or features. In addition, the terms "include" or "have" may be interpreted as indicating certain characteristics, numbers, steps, operations, constituent components, components, or combinations thereof, but should not be interpreted as excluding the possibility of the presence of one or more other characteristics, numbers, steps, operations, constituent components, components, or combinations thereof.

[0038] The term "or" used in various embodiments of the present disclosure includes any of the listed terms and all combinations thereof. For example, "A or B" may include A, may include B, or may include both A and B.

[0039] Unless otherwise defined, all terms (including technical or scientific terms) used in this disclosure have the same meaning as understood by those skilled in the art described in this disclosure. Common terms as defined in dictionaries are interpreted as having a meaning consistent with the context in the relevant technical field and should not be interpreted in an idealized or overly formal manner unless explicitly defined in this disclosure.

[0040] The accompanying drawings discussed below and the various embodiments used to describe the principles of the present disclosure in this patent document are intended to be illustrative only and should not be construed in any way to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged system or device.

[0041] Figure 1 This is an exemplary system architecture 100 of System Architecture Evolution (SAE). User Equipment (UE) 101 is a terminal device used to receive data. Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 102 is a radio access network, which includes a macro base station (eNodeB / NodeB) that provides the UE with an access wireless network interface. The Mobility Management Entity (MME) 103 is responsible for managing the UE's mobility context, session context and security information. The Serving Gateway (SGW) 104 mainly provides user plane functions, and the MME 103 and SGW 104 may be in the same physical entity. The Packet Data Network Gateway (PGW) 105 is responsible for functions such as billing and lawful interception, and may also be in the same physical entity as the SGW 104. The Policy and Charging Rules Function (PCRF) 106 provides Quality of Service (QoS) policies and charging criteria. The General Packet Radio Service Support Node (SGSN) 108 is a network node device that provides routing for data transmission in the Universal Mobile Telecommunications System (UMTS). The Home Subscriber Server (HSS) 109 is the home subsystem of the UE and is responsible for protecting user information including the current location of the user equipment, the address of the serving node, user security information, and the packet data context of the user equipment.

[0042] Figure 2 2 is an exemplary system architecture 200 according to various embodiments of the present disclosure. Other embodiments of the system architecture 200 can be used without departing from the scope of the present disclosure.

[0043] User equipment (UE) 201 is a terminal device used to receive data. The next-generation radio access network (NG-RAN) 202 is a radio access network that includes base stations (gNBs or eNBs connected to the 5G core network 5GC; eNBs connected to 5GC are also called ng-gNBs) that provide UEs with access to wireless network interfaces. The access control and mobility management function (AMF) 203 is responsible for managing the UE's mobility context and security information. The user plane function (UPF) 204 mainly provides user plane functions. The session management function (SMF) 205 is responsible for session management. The data network (DN) 206 includes services such as operator services, Internet access, and third-party services.

[0044] The text and drawings are provided as examples only to aid understanding of the present disclosure. They should not be construed as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, it will be apparent to those skilled in the art based on what is disclosed herein that the embodiments and examples shown may be modified without departing from the scope of the present disclosure.

[0045] Detailed descriptions of steps not related to the present invention are omitted in this application. In the following embodiments, a 5G system is used as an example. The method is also applicable to corresponding entities in other systems.

[0046] In this application, a node can be a complete base station, a base station including a centralized unit and a distributed unit, or a base station including a control plane part (Central Unit Control Plane, CU-CP) of a centralized unit, a user plane part (Central Unit-User Plane, CU-UP) of a centralized unit, and a distributed unit.

[0047] In this application, the message names are only examples, and other names can be used to name messages. The sequence number of the message does not represent the order in which the messages are executed, but only represents the name of the message.

[0048] In NR (New Radio Access), dual connectivity DC (Dual Connectivity) is introduced to improve network performance and single-user traffic, and the performance of this technology is also being continuously improved. In dual connectivity, the UE will be connected to two nodes, one as the master node MN (Master Node) and the other as the secondary node SN (Secondary Node). The secondary node may also be referred to as a secondary node. Among them, a group of cells serving the UE in the MN is called the master cell group MCG (MasterCell Group), and a group of cells serving the UE in the SN is called the secondary (second) cell group SCG (Secondary Cell Group). The MCG primary cell is called the primary cell PCell (Primary Cell), and the SCG primary cell is called the primary secondary cell PSCell (PrimarySCG Cell). CG (Cell group) is a cell group.

[0049] UE cell handover can use conditional reconfiguration, where the network provides multiple candidate cells and execution conditions to the UE. The UE evaluates the execution conditions and selects the target cell from cells that meet the execution conditions. Conditional Handover (CHO), conditional PSCell Addition (CPA), conditional PSCell Change (CPC), and subsequent conditional PSCell Addition or Change (also known as Subsequent CPAC or S-CPAC) all fall under conditional reconfiguration. CPA and CPC are collectively referred to as CPAC. Subsequent CPAC can be used for PSCell changes within a SN (i.e., intra-SN PSCell changes), also known as Intra-SN Subsequent CPAC (Intra-SN S-CPAC, i.e., intra-SN S-CPAC). Cell change can also be referred to as cell handover, and cell handover / change can be either a PCell handover / change or a PSCell handover / change.

[0050] In order to improve cell handover performance, an enhanced configuration method is needed.

[0051] Various embodiments of the present disclosure provide a method performed by a first node in a communication system, the method comprising: receiving a first message from a second node, wherein the first message includes first configuration information and / or second configuration information; and sending a second message to a user equipment (UE), wherein the second message includes third configuration information, wherein the third configuration information is determined based on the first configuration information and / or the second configuration information.

[0052] In the above method, the first node (e.g., MN node) determines the third configuration information based on the first configuration information and / or second configuration information sent by the second node (e.g., SN node), which is conducive to achieving the flexibility of reconfiguration information transmission and improving cell switching performance.

[0053] The following first introduces the basic ideas of the configuration methods for cell handover in various embodiments of the present disclosure.

[0054] For example, when the SN decides to trigger Intra-SN S-CPAC:

[0055] Step 1: The SN completes the selection of candidate cells for S-CPAC, the configuration of the cell group of the candidate cells, and the configuration of the initial S-CPAC execution conditions and the subsequent (or next) S-CPAC (following Subsequent CPAC / S-CPAC) execution conditions. Specifically, it includes:

[0056] - The SN selects a candidate cell (candidate PSCell) for the UE within the SN for S-CPAC. Optionally, the selection of the candidate cell may be based on measurement results or other information.

[0057] The SN determines (or configures) S-CPAC execution conditions for the selected candidate cell for initial S-CPAC. Specifically, the UE evaluates the candidate cells. When one or more candidate cells meet the execution conditions, the UE selects one candidate cell as the target cell, switches from the source cell (source PSCell) to the target cell (target PSCell), and performs S-CPAC. This S-CPAC execution process is referred to as the initial S-CPAC execution process. The execution conditions are provided by the source PSCell (or SN).

[0058] The SN allocates resources to the UE on the candidate PSCell, that is, performs resource configuration. It also selects corresponding candidate cells (e.g., candidate cell 2, candidate cell 3, etc.) for the candidate PSCell (e.g., candidate cell 1) for subsequent S-CPAC. That is, when the candidate cell (e.g., candidate cell 1) is used as the target cell, the corresponding candidate cells (e.g., candidate cell 2, candidate cell 3, etc.) will serve as candidate cells for the candidate cell (e.g., candidate cell 1) for subsequent S-CPAC.

[0059] -SN determines the S-CPAC execution conditions for the corresponding candidate cell, which will be used for the subsequent S-CPAC.

[0060] Step 2: The SN provides the MN with information for S-CPAC. This includes:

[0061] - Provide the information for S-CPAC determined in step 1 to the MN, including

[0062] The candidate cell identifier of S-CPAC, the cell group configuration of the candidate cell, the initial S-CPAC execution condition information, and the candidate cell identifier and execution condition information for subsequent S-CPAC, etc.

[0063] -If the information for S-CPAC is sent to the UE via the MN, the SN will select a configuration format and instruct the MN to send the information for S-CPAC to the UE via the configuration format.

[0064] Step 3: The MN receives information from the SN, which includes information for conditional reconfiguration (e.g., information for S-CPAC). If the MN needs to use the MN format (also called the MN configuration format, also called the first format) to send information to the UE for S-CPAC based on the instruction of the SN, then:

[0065] The MN generates information in the MN format based on the received information for conditional reconfiguration (e.g., S-CPAC) and sends it to the UE. That is, the MN sends the received information for conditional reconfiguration to the UE in the MN format. The MN format is the information format used by the information for conditional reconfiguration sent by the MN to the UE. The information for conditional reconfiguration sent by the MN to the UE is included in a conditional reconfiguration information element and a multi-radio dual connectivity second cell group (or secondary cell group) configuration information element.

[0066] The conditional reconfiguration information unit includes one or more conditional reconfiguration information, each conditional reconfiguration information corresponding to a candidate cell, that is, the conditional reconfiguration information unit includes conditional reconfiguration information (or configuration information) related to the corresponding candidate cell. Therefore, the conditional reconfiguration information unit includes configuration information related to one or more candidate cells, or can be said to include configuration information of one or more candidate cells.

[0067] The conditional reconfiguration information includes a conditional reconfiguration identifier, conditional RRC reconfiguration information, execution condition information, and subsequent conditional reconfiguration information.

[0068] -Conditional reconfiguration flag, corresponding to the candidate cell.

[0069] -The conditional RRC reconfiguration information includes the cell group configuration information of the candidate cells.

[0070] - The subsequent conditional reconfiguration information is used for subsequent conditional reconfiguration, such as for S-CPAC.

[0071] Among them, in order to support subsequent conditional reconfiguration, such as S-CPAC, the SN configures (or selects) the corresponding candidate cell for the candidate cell and determines (or configures) the execution condition. For example, the candidate cell is Cell1, and its corresponding candidate cells are Cell2 and Cell3. Then when Cell1 is used as the target cell, Cell2 and Cell3 will be used as candidate cells for subsequent cell changes. The candidate cell and execution condition information corresponding to the candidate cell are sent to the MN, and the MN includes the candidate cell and execution condition information corresponding to the candidate cell in the subsequent conditional reconfiguration information and sends it to the UE. The subsequent conditional reconfiguration information includes:

[0072] ■ A conditional reconfiguration identifier, corresponding to (associated with) the corresponding candidate cell.

[0073] ■ Execution condition information: When the corresponding candidate cell meets the execution condition, the UE can select the candidate cell as the target cell and perform subsequent conditional reconfiguration.

[0074] In subsequent S-CPAC, if all candidate cells are considered a set, called a candidate cell set, then the corresponding candidate cell configured for each candidate cell also belongs to the candidate cell set. The MN assigns a corresponding conditional reconfiguration identifier to each conditional reconfiguration information. Therefore, the UE can determine the cell group configuration information of the corresponding candidate cell using the conditional reconfiguration identifier.

[0075] The method of the present disclosure is described in detail below with reference to the accompanying drawings and various embodiments.

[0076] Embodiment 1 provides a method for configuring cell handover. In embodiment 1, a method is provided for a MN to send information for S-CPAC to a UE in an MN format.

[0077] Please refer to Figure 3 , Figure 3 1 is a schematic diagram of interaction between a user device, a first node, and a second node according to various embodiments of the present disclosure. The method of embodiment 1 may include one or more of the following steps.

[0078] In step 301, the secondary node (SN) sends a message (also referred to as a first message, or other message names, the present invention is not limited thereto) to the primary node (MN). The message may be a secondary node modification request (S-NODE MODIFICATIONREQUIRED) message, or other messages. For example, when the SN adopts the Intra-SN S-CPAC mechanism to change the PSCell, the information for Intra-SN S-CPAC is provided to the MN through the message. The information for Intra-SN S-CPAC can be sent to the UE through the MN, and the SN selects the format in which the information is sent to the UE through the MN, which format may be an MN configuration format or an SN configuration format. The message (also referred to as a first message, or other message names, the present invention is not limited thereto) includes at least one of the following information:

[0079] (1) UE identification information, including the UE identification on the master base station (M-NG-RAN node UE XnAP ID) and the UE identification on the secondary base station (S-NG-RAN node UE XnAP ID)

[0080] (2) Configuration format indication (also referred to as configuration format indication information, or other message names, but the present invention is not limited thereto) indicates the information format used by the MN when sending information for S-CPAC to the UE. Optionally, the configuration format may be the MN configuration format or the SN configuration format. The configuration format is selected by the SN. The configuration format indication is optional.

[0081] (3) A container from the first auxiliary node to the primary node (also referred to as a first container from the second node to the first node, or a first container, etc.). Optionally, the container from the first auxiliary node to the primary node may be a cell group candidate list (CG-CandidateList) message. This message contains configuration information of one or more candidate cells (also referred to as first configuration information). The candidate cells and the configuration information of the candidate cells are used for S-CPAC.

[0082] The configuration information of the candidate cell includes at least one of the following information:

[0083] -SSB frequency information, that is, the SSB (Synchronization Signal

[0084] The ARFCN (absolute radio frequency channel number) of the synchronization signal block.

[0085] - Candidate cell identifier (also called the first candidate cell identifier), that is, candidate

[0086] The identifier of the PSCell may be a PCI (PhysCellId, Physical Cell ID) or other cell identifiers. The candidate cell identifiers may also include a source PSCell identifier.

[0087] -Cell group configuration, or cell group configuration information, that is, SCG cell group configuration

[0088] (SCG-CellGroupConfig), (also referred to as the cell group configuration of the first candidate cell), is the cell group configuration of the SCG of the candidate cell (PSCell). The cell group configuration of the SCG of the candidate cell may also be referred to as cell group configuration information of the SCG of the candidate cell, or as the cell group configuration of the candidate cell, or as the cell group configuration information of the candidate cell, etc. The cell group configuration may include information or configuration information of the SCG of the candidate cell, for example, may include at least one of the following information:

[0089] i. A secondary cell group (secondaryCellGroup), or a second cell group, includes a cell group configuration (CellGroupConfig). The secondary cell group is also the cell group configuration or cell group configuration information of the candidate cell (PSCell).

[0090] ii. Measurement configuration (measConfig), also known as measurement configuration information: The measurement configuration is a measurement configuration provided by a candidate cell (PSCell) (or SN).

[0091] -Candidate cell information list (also called fourth configuration information), which is used as the candidate cell information list for the subsequent Subsequent CPAC process

[0092] (candidateCellInfoListSubsequentCPC) When the first candidate cell is used as the target cell, the cells in the candidate cell information list are used as candidate cells for the subsequent S-CPAC process. The candidate cell information includes at least one of the following information

[0093] one:

[0094] i. The candidate cell identifier (also called the third candidate cell identifier), that is, the identifier of the candidate PSCell, may be PCI (PhysCellId, Physical Cell ID) or other cell identifiers.

[0095] ii. Execution condition information (also called third execution condition information). The execution condition associated with the candidate cell. When the candidate cell meets the execution condition, the UE may select the candidate cell as the target cell. The execution condition information is configured by the SN or (the first candidate cell) and is used for subsequent (or next) S-CPAC process execution.

[0096] The third candidate cell is a candidate cell selected (configured) by the SN for the first candidate cell. When the first candidate cell is used as the target cell, the third candidate cell and the third execution condition information are used in a subsequent S-CPAC process.

[0097] The cell group configuration and the candidate cell information list may be included in one information unit, which may be a cell group configuration information unit (CG-Config IE).

[0098] (4) A container from the second auxiliary node to the master node (also referred to as a second container from the second node to the first node, or a second container, etc.). Optionally, the container from the second auxiliary node to the master node may be a cell group configuration (CG-Config) message (also referred to as second configuration information), which is SCG wireless configuration information provided by the SN, and includes execution condition information and / or configuration-related information of one or more candidate cells. The candidate cells, the execution conditions, and the configuration are used for S-CPAC. The configuration information includes at least one of the following information:

[0099] - Execution condition information of one or more candidate cells, wherein the execution condition information includes at least one of the following information:

[0100] i. Candidate cell identifier (also referred to as the fourth candidate cell identifier), that is, the identifier of the candidate PSCell, which may be PCI (PhysCellId, Physical Cell ID) or other cell identifiers. The candidate cell identifier may be the first candidate cell identifier.

[0101] ii. Execution condition information (also referred to as first execution condition information), also referred to as execution condition. The execution condition may also be referred to as the execution condition of the condition (condExecutionCond). The execution condition is the execution condition associated with the candidate cell. When the candidate cell meets the execution condition, the UE may select the candidate cell as the target cell. The execution condition information is configured by the source cell (PSCell) (or SN) and is used for the initial S-CPAC process. Optionally, the execution condition information may be identified using the execution condition of the SCG condition (condExecutionCondSCG).

[0102] -Cell group configuration, also known as cell group configuration information. The cell group configuration, also known as the SCG cell group configuration (SCG-CellGroupConfig), includes the cell group configuration information of the SCG of the source PSCell. It includes the measurement configuration related to the execution condition (MeasConfig), also known as measurement configuration information (which may be referred to as measurement configuration information related to the first execution condition). The measurement configuration is the measurement configuration provided by the source PSCell (or SN).

[0103] - Measurement results, which are included in the SN candidate cell information list (candidateCellInfoListSN), and include measurement results of the candidate cell and measurement results of other cells.

[0104] - Configuration information of one or more candidate cells, where the candidate cells and their configuration information are used for S-CPAC. The configuration information of the candidate cells may include at least one of the following:

[0105] i. The identifier of the second candidate cell;

[0106] ii. Cell group configuration of the second candidate cell;

[0107] iii. The fifth configuration information is related to the subsequent S-CPAC.

[0108] Among them, the specific description of the identification of the second candidate cell, the cell group configuration of the second candidate cell, and the fifth configuration information can be found in the container from the first auxiliary node to the main node, which is not repeated here.

[0109] The following method may be used to instruct the MN to send information for S-CPAC to the UE using the MN format:

[0110] -If the message (also referred to as the first message) contains a container from the first secondary node to the primary node, it indicates that the MN format is used.

[0111] - If the message (also referred to as the first message) includes a configuration format indication, indicating that the MN uses the MN format configuration, it indicates that the MN format is used.

[0112] In step 302, the MN sends a message to the UE (which may also be referred to as a second message, or other message names, the present invention is not limited thereto). The message may be an RRC reconfiguration message (RRC Reconfiguration) or other messages. The message includes information provided to the UE, and the information is used for conditional reconfiguration (the information may be referred to as third configuration information). For example, the information may be used for Intra-SN S-CPAC. Based on the information in step 301, the MN determines that the information for conditional reconfiguration needs to be provided to the UE in the MN format (MN Format). Then, the MN will send the information for S-CPAC to the UE based on the information received in step 301 (the first configuration information and / or the second configuration information) in the following information format. The configuration information (which may also be referred to as the third configuration information) includes at least one of the following information:

[0113] (1) A conditional reconfiguration information unit includes one or more conditional reconfiguration information. Each conditional reconfiguration information corresponds to a candidate cell, that is, the conditional reconfiguration information includes the conditional reconfiguration information (or configuration information) related to the corresponding candidate cell. Therefore, the conditional reconfiguration information unit includes configuration information of one or more candidate cells. The conditional reconfiguration information includes at least one of the following information:

[0114] - A conditional reconfiguration identifier (CondReconfigId) (also referred to as a first conditional reconfiguration identifier), used to identify the conditional reconfiguration information. The conditional reconfiguration identifier corresponds to a candidate cell and is used to identify conditional reconfiguration information related to the candidate cell. The conditional reconfiguration information related to the candidate cell includes a conditional RRC reconfiguration and execution conditions and / or subsequent conditional reconfiguration. The candidate cell is the candidate cell in the first configuration information and / or the second configuration information, so the conditional reconfiguration identifier corresponds to the candidate cell in the first configuration information and / or the second configuration information.

[0115] Conditional RRC reconfiguration information (also referred to as first conditional radio resource control (RRC) reconfiguration information), also referred to as conditional RRC reconfiguration, includes cell group configuration information (or cell group configuration of the candidate cell) of the candidate cell. This includes measurement configuration information (or measurement configuration) of the candidate cell. The measurement configuration is a measurement configuration provided by the SN. The conditional RRC reconfiguration includes the cell group configuration of the candidate cell in the first configuration information and / or the second configuration information.

[0116] -Execution condition information (also referred to as second execution condition information), also referred to as execution condition information. When a candidate cell meets the execution condition, the UE may select the candidate cell as the target cell. If the candidate cell is the candidate cell corresponding to the source cell, the execution condition is used for initial S-CPAC. The execution condition includes the execution condition in the second configuration information.

[0117] -Subsequent conditional reconfiguration (subsequentCondReconfig), also known as subsequent conditional reconfiguration information. This information is used for the next S-CPAC process. The subsequent conditional reconfiguration information includes at least one of the following information:

[0118] i. A conditional reconfiguration identifier (also called a second conditional reconfiguration identifier), which corresponds to a candidate cell for subsequent S-CPAC. Each candidate cell has a conditional reconfiguration identifier, so the candidate cell for subsequent S-CPAC also has a corresponding reconfiguration identifier. The candidate cell is the candidate cell in the fourth or fifth configuration information. Therefore, the conditional reconfiguration identifier corresponds to the candidate cell in the fourth or fifth configuration information.

[0119] ii. Execution condition information (also called fourth execution condition information), also known as execution condition, is used as the execution condition or execution condition information for the subsequent S-CPAC process.

[0120] The measurement configuration information related to the execution condition information is included in the conditional RRC reconfiguration information. The execution condition includes the execution condition in the fourth configuration information or the fifth configuration information.

[0121] (2) Multi-radio dual connectivity second cell group (or secondary cell group) configuration information element

[0122] The (mrdc-SecondaryCellGroup) information element includes second cell group (secondary cell group) information or configuration information (SCG information or SCG configuration information). The SCG information includes measurement configuration information related to the execution condition (also referred to as measurement configuration information related to the second execution condition). The MN includes the cell group configuration information in the second configuration information received in step 301 as SCG information in the (mrdc-SecondaryCellGroup) information element. The measurement configuration information related to the execution condition contained therein is used for the execution of the initial S-CPAC process.

[0123] Step 303: The UE sends a message to the MN to indicate that the RRC reconfiguration is completed. The message may be an RRC reconfiguration message or other messages.

[0124] After receiving the message in step 302, the UE saves the information contained in the message and evaluates the candidate cells to determine whether the execution conditions are met.

[0125] Step 304: The MN sends a message to the SN. The message may be an S-NODEMODIFICATION CONFIRM message or other messages. The MN indicates to the SN that the UE has completed the S-CPAC configuration.

[0126] The method is conducive to achieving the flexibility of conditional reconfiguration information transmission and improving cell switching performance.

[0127] Embodiment 2 provides a method for configuring cell handover.

[0128] According to the first embodiment, it can be seen that if the SN chooses to send conditional reconfiguration information in the MN format, such as sending conditional reconfiguration information for Intra-SN S-CPAC, the SN needs to provide corresponding information to the MN, for example, the information contained in the container from the first auxiliary node to the master node and the container from the second auxiliary node to the master node, for the MN to provide S-CPAC information to the UE in accordance with the MN format. Therefore, when the MN receives the information sent by the SN, if the MN also wants to trigger conditional reconfiguration and change the PCell or PSCell, in order to avoid the number of conditional reconfigurations configured by the SN and the MN or the number of candidate cells for conditional reconfiguration exceeding the maximum limit (or threshold), the MN can optionally adjust the number of conditional reconfigurations triggered by itself, or adjust (reduce) the number of conditional reconfigurations provided by the SN, for example, reduce the number of candidate cells. If the MN decides to reduce the number of candidate cells provided by the SN, it can provide the SN with recommended candidate cells or the number of candidate cells that the SN can configure. The maximum value may be related to UE capabilities, that is, the maximum value is set according to the UE capabilities to avoid exceeding the UE capabilities. For example, the maximum number of conditional reconfigurations that a UE can support may be the maximum number of candidate cells for conditional reconfiguration. The SN provides updated information for S-CPAC based on the candidate cells recommended by the MN.

[0129] Please refer to Figure 4 , Figure 4 This is another schematic diagram of interaction between a user equipment, a first node, and a second node according to various embodiments of the present disclosure. The method of the second embodiment may include one or more of the following steps.

[0130] In step 401, the SN sends a message to the MN (also referred to as a first message, or a first auxiliary node modification request, or other message names). The message may be an auxiliary node modification request (S-NODE MODIFICATION REQUIRED) message, or other messages. For example, when the SN adopts the Intra-SN S-CPAC mechanism to change the PSCell, the information for the Intra-SN S-CPAC is provided to the MN through the message. The information for the Intra-SN S-CPAC can be sent to the UE through the MN. The SN selects the format in which the information is sent to the UE through the MN, and can be sent in the MN format or in the SN format. For specific information of the message, please refer to step 301 and will not be repeated here.

[0131] If the MN decides to reduce the number of candidate cells provided by the SN, steps 402 and 403 will be executed.

[0132] In step 402, the MN sends a message (also referred to as a third message, or other message names) to the SN. The message may be an S-NODE MODIFICATION CONFIRM message, or other messages. The message may also be referred to as a first S-NODE MODIFICATION CONFIRM message. The message includes at least one of the following information:

[0133] - Information about one or more candidate cells. The candidate cells are used for S-CPAC. The candidate cell information includes at least one of the following:

[0134] i.SSB frequency information, that is, the ARFCN of the SSB of the candidate cell.

[0135] ii. Candidate cell identification, the candidate cell identification can use PCI (PhysCellId,

[0136] The candidate cell identifier may be an identifier of a candidate PSCell.

[0137] - Maximum number of PSCells To

[0138] Prepare), indicating the maximum number of candidate cells that the SN can configure.

[0139] The information of one or more candidate cells included in the third message and / or the maximum number of candidate cells that can be prepared is determined based on the first configuration information sent by the MN to the SN to ensure that the number of candidate cells configured by the second node (e.g., SN) for conditional reconfiguration does not exceed the UE capability.

[0140] In step 403, the SN sends a message to the MN (also referred to as a fourth message, or other message names). The message may be an S-NODE MODIFICATION REQUIRED message, or other messages. The message may also be referred to as a second auxiliary node modification request. The SN adjusts the candidate cells based on the candidate cells recommended by the MN, or based on the maximum number of candidate cells that can be prepared provided by the MN, and provides updated information for S-CPAC. The message may include updated first configuration information and / or updated second configuration information. For specific information, please refer to the detailed description of the first configuration information and / or the second configuration information in step 301, which will not be repeated here.

[0141] Steps 404-406 are the same as steps 302-304. For detailed description, see steps 302-304, which will not be repeated here.

[0142] The method is conducive to achieving flexibility in conditional reconfiguration information transmission, while preventing the number of conditional reconfigurations / the number of candidate cells for conditional reconfiguration from exceeding UE capabilities, which is conducive to ensuring the reasonable application of conditional reconfiguration and improving cell switching performance.

[0143] Embodiment 3 provides a method for configuring cell handover.

[0144] When the SN decides to trigger Intra-SN S-CPAC, it sends the selected candidate cell identifier list and measurement results to the MN. Based on the candidate cell identifiers received from the SN, if the MN also wants to trigger the configuration of conditional reconfiguration at this time, it changes the PCell or PSCell. In order to avoid the number of conditional reconfigurations configured by the SN and the MN or the number of candidate cells exceeding the maximum limit (or threshold), the MN can optionally adjust the number of conditional reconfigurations triggered by itself. The MN can also adjust (reduce) the number of conditional reconfigurations provided by the SN, for example, reduce the number of candidate cells. If the MN decides to reduce the number of candidate cells provided by the SN, it provides the SN with recommended candidate cells or the number of candidate cells that the SN can configure. Optionally, the MN can determine the number of candidate cells that the SN can configure, or determine the recommended candidate cells based on the measurement results provided by the SN.

[0145] Please refer to Figure 4 , Figure 4This is another schematic diagram of interaction between a user equipment, a first node, and a second node according to various embodiments of the present disclosure. The method of embodiment 3 may include one or more of the following steps.

[0146] In step 401, a secondary node (SN) sends a message to a primary node (MN). The message may be an S-NODE MODIFICATION REQUIRED message or other message. The message may also be referred to as a first secondary node modification request. When the SN decides to trigger Intra-SN S-CPAC, the SN provides an indication to the MN through the message that the SN uses the S-CPAC mechanism to change the PSCell and provides candidate cell information for S-CPAC. The message may include at least one of the following information:

[0147] (1) UE identification information, including the UE identification on the master base station (M-NG-RAN node UE XnAP ID) and the UE identification on the secondary base station (S-NG-RAN node UE XnAP ID).

[0148] ID).

[0149] (2) Configuration format indication, indicating the information format used by the MN when sending information for S-CPAC to the UE. Optionally, the configuration format can be the MN configuration format or the SN configuration format. The configuration format is selected by the SN. The configuration format indication is optional.

[0150] (3) Container from the first auxiliary node to the primary node. Optionally, the container from the first auxiliary node to the primary node may be a cell group candidate list (CG-CandidateList) message, which may include one or more of the following information:

[0151] - Information about one or more candidate cells (also referred to as first configuration information). The candidate cells are used for S-CPAC. The candidate cell information includes at least one of the following:

[0152] i.SSB frequency information, that is, the ARFCN of the SSB of the candidate cell.

[0153] ii. Candidate cell identification, the candidate cell identification can use PCI (PhysCellId,

[0154] The candidate cell identifier may be an identifier of a candidate PSCell.

[0155] - Measurement results, which are included in the SN candidate cell information list

[0156] (candidateCellInfoListSN), the measurement result includes the measurement result of the candidate cell and the measurement results of other cells.

[0157] If the MN decides to reduce the number of candidate cells provided by the SN, it will provide the SN with recommended candidate cells or the number of candidate cells that the SN can configure. Based on the measurement results provided by the SN, the MN will determine the number of candidate cells that the SN can configure or recommend. Step 402 will be executed. In step 403, the MN will obtain the information provided by the SN for S-CPAC.

[0158] Otherwise, directly execute step 404.

[0159] In step 402, the MN sends a message (also called a first auxiliary node modification confirmation, or other message names) to the SN. The message may be an S-NODE MODIFICATION CONFIRM message, or other messages. The message includes information about candidate cells recommended by the MN. The message includes at least one of the following information:

[0160] - Information about one or more candidate cells. The candidate cells are used for S-CPAC. The candidate cell information includes at least one of the following:

[0161] i.SSB frequency information, that is, the ARFCN of the SSB of the candidate cell.

[0162] ii. Candidate cell identification, the candidate cell identification can use PCI (PhysCellId,

[0163] The candidate cell identifier may be an identifier of a candidate PSCell.

[0164] - Maximum number of PSCells To

[0165] Prepare), indicating the maximum number of candidate cells that the SN can configure.

[0166] The information of one or more candidate cells included in the modification confirmation of the first auxiliary node and / or the maximum number of candidate cells that can be prepared is determined based on the first configuration information sent by the MN to the SN to ensure that the number of candidate cells configured by the second node (e.g., SN) for conditional reconfiguration does not exceed the UE capability.

[0167] In step 403, the SN sends a message to the MN. The message may be an S-NODEMODIFICATION REQUIRED message or other message. The message may also be referred to as a second auxiliary node modification request. The SN selects a candidate cell based on the candidate cell recommended by the MN or the maximum number of candidate cells that can be prepared provided by the MN, and provides information for S-CPAC. The message may include updated first configuration information and / or second configuration information. For specific information, refer to the detailed description of the first configuration information and / or second configuration information in step 301. For specific information of the message, refer to step 301 and will not be repeated here.

[0168] Steps 404-406 are the same as steps 302-304. For detailed description, see steps 302-304, which will not be repeated here.

[0169] The method prevents the number of conditional reconfigurations / the number of candidate cells for conditional reconfiguration from exceeding the UE capability, which is conducive to ensuring the reasonable application of conditional reconfiguration, and is conducive to achieving the flexibility of conditional reconfiguration information transmission and improving cell switching performance.

[0170] Example 4 provides a method for configuring cell switching

[0171] In step 500a, the MN sends a message (also called a conditional reconfiguration request indication message, or other message names in the present invention) to the SN, which includes the maximum number of candidate cells that the SN can prepare. The message can be a conditional reconfiguration request indication message, or other messages.

[0172] The message includes at least one of the following information:

[0173] - Maximum number of PSCells To

[0174] Prepare), indicating the maximum number of candidate cells that the SN can configure.

[0175] Step 500b: The SN sends a message to the MN to confirm that the SN has received the information sent by the MN. The message may be a conditional reconfiguration request confirmation or other messages.

[0176] When the SN decides to trigger intra-SN S-CPAC, it selects a candidate cell based on the maximum number of candidate cells that can be prepared, as provided by the MN. It also sends S-CPAC information to the MN and instructs the MN to send the S-CPAC information to the UE in the MN format. This is accomplished through steps 501-502.

[0177] Steps 501-502 are the same as steps 301-302. For details, see steps 301-302 and will not be repeated here.

[0178] The UE completes the corresponding configuration according to the received message and sends feedback information to the MN.

[0179] Steps 503-504 are the same as steps 303-304. For details, see steps 303-304 and will not be repeated here.

[0180] The method prevents the number of conditional reconfigurations / the number of candidate cells for conditional reconfiguration from exceeding the UE capability, which is conducive to ensuring the reasonable application of conditional reconfiguration, and is conducive to achieving the flexibility of conditional reconfiguration information transmission and improving cell switching performance.

[0181] Embodiment 5 provides a method for configuring cell handover.

[0182] In the fifth embodiment, the SN sends information to the MN to instruct the SN to use the S-CPAC mechanism to change the PSCell. After obtaining confirmation from the MN, the SN provides information for S-CPAC.

[0183] Please refer to Figure 6 , Figure 6 This is another schematic diagram of interaction between a user equipment, a first node, and a second node according to various embodiments of the present disclosure. The method of embodiment 5 may include one or more of the following steps.

[0184] In step 601, a secondary node (SN) sends a message to a primary node (MN). The message may be an S-NODE MODIFICATION REQUIRED message or other message. The message may also be referred to as a first secondary node modification request. When the SN decides to trigger Intra-SN S-CPAC, the SN provides an indication to the MN through the message that the SN uses the S-CPAC mechanism to change the PSCell and provides information for the initial S-CPAC. The message includes at least one of the following information:

[0185] (1) UE identification information, including the UE identification on the master base station (M-NG-RAN node UE XnAP ID) and the UE identification on the secondary base station (S-NG-RAN node UE XnAP ID).

[0186] ID).

[0187] (2) Configuration format indication, indicating the configuration format used for the S-CPAC configuration. Optionally, the configuration format may be the MN configuration format or the SN configuration format. The configuration format indication is optional. If included, the configuration format indication may also be used to indicate to the MN that the SN will use the S-CPAC method for PSCell changes.

[0188] (3) A container from the second auxiliary node to the master node. Optionally, the container from the second auxiliary node to the master node may be a cell group configuration (CG-Config) message, which is SCG wireless configuration information provided by the SN, and includes execution condition information and / or configuration-related information of one or more candidate cells. The candidate cells, the execution conditions, and the configuration are used for S-CPAC. The configuration information includes at least one of the following information:

[0189] - Execution condition information of one or more candidate cells, wherein the execution condition information includes at least one of the following information:

[0190] i. Candidate cell identifier (also known as the first candidate cell identifier), that is, the identifier of the candidate PSCell, which can be PCI (PhysCellId, Physical Cell ID),

[0191] Or other cell identifiers.

[0192] ii. Execution condition information (also called first execution condition information), the execution condition associated with the candidate cell. When the candidate cell meets the execution condition, the UE can select the candidate cell as the target cell. The execution condition information is the source cell.

[0193] (PSCell) (or SN) configuration, for the initial S-CPAC process, that is, for the initial S-CPAC execution conditions / execution condition information. Optionally, the execution condition information can use the execution condition of the SCG condition

[0194] (condExecutionCondSCG) is identified.

[0195] -Cell group configuration, also known as cell group configuration information. The cell group configuration, also known as the SCG cell group configuration (SCG-CellGroupConfig), includes the cell group configuration information of the SCG of the source PSCell. It includes the measurement configuration related to the execution condition (MeasConfig), also known as measurement configuration information. The measurement configuration is the measurement configuration provided by the source PSCell (or SN).

[0196] - Measurement results, which are included in the SN candidate cell information list

[0197] (candidateCellInfoListSN), the measurement result includes the measurement result of the candidate cell and the measurement results of other cells.

[0198] Step 602: MN sends a message to SN.

[0199] After the MN receives the indication from the SN in step 601 that the PSCell will be changed using the S-CPAC method, if the MN accepts the indication, it will send a message to indicate the change. The message may include the number of candidate cells recommended for the SN configuration. The message may be an S-NODE MODIFICATION CONFIRM message, also known as a first S-NODE MODIFICATION CONFIRM message, or other message. The message may include at least one of the following information:

[0200] -UE identification information, including the UE identification on the primary base station (M-NG-RAN node UE XnAP ID) and the UE identification on the secondary base station (S-NG-RAN node UE XnAP ID).

[0201] -Maximum number of candidate cells, indicating the maximum number of candidate cells that can be configured by the SN.

[0202] If the MN rejects, a message will be sent to indicate this, and the message may be an S-NODEMODIFICATION REFUSE message, also known as a first auxiliary node modification reject, or other messages.

[0203] In step 603, the SN sends a message to the MN. The message may be an S-NODEMODIFICATION REQUIRED message or other message. The message may also be referred to as a second S-NODEMODIFICATION REQUIRED message. The message provides information for subsequent S-CPAC. The message includes at least one of the following information:

[0204] (1) UE identification information, including the UE identification on the master base station (M-NG-RAN node UE XnAP ID) and the UE identification on the secondary base station (S-NG-RAN node UE XnAP ID)

[0205] (2) A container from the first auxiliary node to the master node. Optionally, the container from the first auxiliary node to the master node may be a cell group candidate list (CG-CandidateList) message. This message contains configuration information of one or more candidate cells (i.e., SCG wireless configuration information of the candidate cells). The candidate cells and the configuration information are used for S-CPAC. The configuration information of the candidate cells includes at least one of the following information:

[0206] -SSB frequency information, that is, the ARFCN of the SSB of the candidate cell.

[0207] -Candidate cell identifier, that is, the identifier of the candidate PSCell, which can be PCI (PhysCellId,

[0208] Physical Cell ID) or other cell identifier.

[0209] -Cell group configuration, also known as cell group configuration information. The cell group configuration is the cell group configuration of the SCG (SCG-CellGroupConfig), which is the candidate cell

[0210] The cell group configuration of the SCG of the candidate cell (PSCell). The cell group configuration of the SCG of the candidate cell can also be called the cell group configuration information of the SCG of the candidate cell, or the cell group configuration of the candidate cell, or the cell group configuration information of the candidate cell. It contains information or configuration information of the SCG of the candidate cell.

[0211] i. A secondary cell group (secondaryCellGroup), or a second cell group, includes a cell group configuration (CellGroupConfig). The secondary cell group is also the cell group configuration or cell group configuration information of the candidate cell (PSCell).

[0212] ii. Measurement configuration (measConfig), also known as measurement configuration information: The measurement configuration is a measurement configuration provided by a candidate cell (PSCell) (or SN).

[0213] -Candidate cell information list, which is used for the subsequent Subsequent CPAC process (candidateCellInfoListSubsequentCPC). The candidate cells are used in the subsequent S-CPAC process. The candidate cell information includes at least one of the following information:

[0214] i. Candidate cell identifier, that is, the identifier of the candidate PSCell, which can be PCI

[0215] (PhysCellId, Physical Cell ID), or other cell identifiers.

[0216] ii. Execution condition information: The execution condition associated with the candidate cell, used for subsequent S-CPAC process execution.

[0217] The cell group configuration and the candidate cell information list may be included in one information unit. The information unit may be a cell group configuration information unit.

[0218] (CG-Config IE).

[0219] Steps 604-406 are the same as steps 302-304. For detailed description, see steps 302-304, which will not be repeated here.

[0220] The method is conducive to achieving the flexibility of conditional reconfiguration information transmission and improving cell switching performance.

[0221] In addition, it can be understood that the content contained in each message in the above embodiment is only an example of the present disclosure. The content contained in various similar or identical messages can be replaced with each other according to the situation, or named with different names, or some items can be added or deleted. For the sake of brevity, the meanings of similar content items can be explained to each other according to the context without further elaboration. The modified and interpreted implementation methods still fall within the scope of protection of the present invention.

[0222] Figure 7 is a block diagram illustrating a structure of a user equipment 1000 according to an embodiment of the present disclosure.

[0223] refer to Figure 7 User equipment 1000 includes a transceiver 1001 and a controller 1002. Transceiver 1001 is configured to transmit and receive signals to and from the outside. Controller 1002 is configured to execute the above-described method performed by the user equipment. User equipment 1000 can be implemented in the form of hardware, software, or a combination of hardware and software to enable it to execute the method performed by the user equipment described in this disclosure.

[0224] Figure 8 is a block diagram illustrating a structure of a first node 1100 according to an embodiment of the present disclosure.

[0225] refer to Figure 8, a first node 1100 includes a transceiver 1101 and a controller 1102. The transceiver 1101 is configured to send signals to and receive signals from the outside. The controller 1102 is configured to execute the method performed by the first node. The first node 1100 can be implemented in the form of hardware, software, or a combination of hardware and software to enable it to execute the method performed by the first node described in this disclosure.

[0226] Figure 9 is a block diagram illustrating a structure of a second node 1200 according to an embodiment of the present disclosure.

[0227] refer to Figure 9 The second node 1200 includes a transceiver 1201 and a controller 1202. The transceiver 1201 is configured to send and receive signals to and from the outside. The controller 1202 is configured to execute the method performed by the second node. The second node 1200 can be implemented in the form of hardware, software, or a combination of hardware and software to enable it to execute the method performed by the second node described in this disclosure.

[0228] At least one embodiment of the present disclosure further provides a non-transitory computer-readable recording medium having stored thereon a program for executing the above-mentioned method when executed by a computer.

[0229] Various embodiments of the present disclosure can be implemented as computer-readable codes embodied on a computer-readable recording medium from a specific perspective. A computer-readable recording medium is any data storage device that can store data readable by a computer system. Examples of computer-readable recording media may include read-only memory (ROM), random access memory (RAM), compact disc read-only memory (CD-ROM), magnetic tape, floppy disk, optical data storage device, carrier wave (e.g., data transmission via the Internet), and the like. Computer-readable recording media can be distributed by computer systems connected via a network, and therefore computer-readable codes can be stored and executed in a distributed manner. Moreover, the functional programs, codes, and code segments for implementing the various embodiments of the present disclosure can be easily interpreted by those skilled in the art in the field of applying the embodiments of the present disclosure.

[0230] It will be understood that the embodiments of the present disclosure can be implemented in the form of hardware, software, or a combination of hardware and software. The software can be stored as program instructions or computer-readable code executable on a controller on a non-transient computer-readable medium. Examples of non-transient computer-readable recording media include magnetic storage media (e.g., ROM, floppy disk, hard disk, etc.) and optical recording media (e.g., CD-ROM, digital video disk (DVD), etc.). The non-transient computer-readable recording medium can also be distributed on a network-coupled computer system so that the computer-readable code is stored and executed in a distributed manner. The medium can be read by a computer, stored in a memory, and executed by a controller. Various embodiments can be implemented by a computer or a portable terminal including a controller and a memory, and the memory can be an example of a non-transient computer-readable recording medium suitable for storing (multiple) programs with instructions for implementing the embodiments of the present disclosure. The present disclosure can be implemented by a program having a code for specifically implementing the apparatus and method described in the claims, the program being stored in a machine (or computer) readable storage medium. The program can be electronically carried on any medium, such as a communication signal transmitted via a wired or wireless connection, and the present disclosure suitably includes its equivalents.

[0231] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any person skilled in the art may make various changes or substitutions within the technical scope disclosed in the present disclosure, and such changes or substitutions shall be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure shall be subject to the scope of protection of the claims.

Claims

1. A method performed by a first node in a communication system, the method comprising: receiving a first message from the second node, wherein the first message includes first configuration information and / or second configuration information; A second message is sent to a user equipment (UE), wherein the second message includes third configuration information, and wherein the third configuration information is determined based on the first configuration information and / or the second configuration information.

2. The method according to claim 1, wherein The first configuration information, the second configuration information, and the third configuration information are related to the subsequent addition or change of S-CPAC of conditional primary and secondary cells.

3. The method according to claim 1, wherein The first configuration information is included in a first container from the second node to the first node.

4. The method according to any one of claims 1 to 3, wherein The first configuration information includes configuration information of one or more candidate cells, The configuration information of the candidate cell includes at least one of the following: an identifier of the first candidate cell; cell group configuration of the first candidate cell; Fourth configuration information, the fourth configuration information is related to the subsequent S-CPAC.

5. The method according to claim 1, wherein The second configuration information is included in a second container from the second node to the first node.

6. The method according to any one of claims 1 to 3 or 5, wherein The second configuration information includes at least one of the following: Configuration information of one or more candidate cells; First execution condition information of one or more candidate cells, including execution condition information for initial S-CPAC; Measurement configuration information related to the first execution condition.

7. The method according to claim 6, wherein: The configuration information of the candidate cell includes at least one of the following: an identifier of the second candidate cell; cell group configuration of the second candidate cell; The fifth configuration information is related to the subsequent S-CPAC.

8. The method according to claim 1, wherein The third configuration information includes at least one of the following: a first conditional reconfiguration identifier, wherein the first conditional reconfiguration identifier corresponds to a candidate cell; The first condition is radio resource control RRC reconfiguration information; Second execution condition information, including execution condition information for initial S-CPAC; measurement configuration information related to the second execution condition; subsequent conditional reconfiguration information; The subsequent conditional reconfiguration information includes at least one of the following: a second conditional reconfiguration identifier, wherein the second conditional reconfiguration identifier corresponds to a candidate cell for subsequent S-CPAC; The fourth execution condition information includes execution condition information for subsequent S-CPAC.

9. The method according to claim 1, wherein The first message also includes configuration format indication information.

10. The method according to claim 1 or 9, wherein The third configuration information is sent in the first format; Whether the third configuration information is sent in the first format is determined based on the configuration format indication information or based on whether the first configuration information is included in the first message.

11. The method according to claim 8, wherein The first format corresponds to the first conditional configuration identifier, the first conditional RRC reconfiguration information, the second execution condition information, and the subsequent conditional reconfiguration information being included in a conditional reconfiguration information element.

12. The method according to claim 4 or 7, wherein the fourth configuration information or the fifth configuration information comprises at least one of the following: a third candidate cell identifier, used to identify the third candidate cell selected by the second node as the first candidate cell; Third execution condition information; in, When the first candidate cell is used as the target cell, the third candidate cell and the third execution condition information are related to subsequent S-CPAC.

13. The method according to claim 1, wherein The method further comprises: sending a third message to the second node, wherein the third message includes information of one or more candidate cells and / or the number of candidate cells, The information of one or more candidate cells and / or the number of candidate cells included in the third message is determined based on the first configuration information to ensure that the number of candidate cells configured by the second node for conditional reconfiguration does not exceed the UE capability.

14. The method according to claim 13, wherein: The first message also includes a measurement result, and The information of the one or more candidate cells and / or the number of candidate cells included in the third message is determined based on the measurement result.

15. A method performed by a user equipment (UE) in a communication system, the method comprising: receiving a second message from the first node, wherein the second message includes third configuration information, wherein the third configuration information is determined based on the first configuration information and / or the second configuration information included in the first message sent by the second node to the first node; Based on the third configuration information, a subsequent conditional primary and secondary cell addition or change S-CPAC process is performed.

16. A method performed by a second node in a communication system, the method comprising: Sending a first message to the first node, where the first message includes the first configuration information, the second configuration information, and / or the measurement result; receiving a third message from the first node, wherein the third message includes information of one or more candidate cells and / or the number of candidate cells; The information of one or more candidate cells and / or the number of candidate cells included in the third message is determined based on the first configuration information or measurement result to ensure that the number of candidate cells configured by the second node for conditional reconfiguration does not exceed the UE capability.

17. The method according to claim 16, wherein The method further comprises: A fourth message is sent to the first node, wherein the fourth message includes updated first configuration information and / or updated second configuration information.

18. A node device, the user equipment comprising: a transceiver configured to transmit and receive signals with the outside; as well as A controller is configured to control the transceiver to perform the method according to any one of claims 1-14 or 16-17.

19. A user equipment (UE), comprising: a transceiver configured to transmit and receive signals with the outside; as well as A controller is configured to control the transceiver to perform the method according to claim 15.

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