Cell setting method and device

Abstract

This application provides a cell configuration method and device, the method including: a master node determining M candidate primary secondary cells, where M is a positive integer; the master node acquiring first reference configuration information; and the master node acquiring RRC messages corresponding to N candidate primary secondary cells, where N is a positive integer, the N candidate primary secondary cells being included in the M candidate primary secondary cells, the RRC message for a first candidate primary secondary cell among the N candidate primary secondary cells including SCG configuration information for the first candidate primary secondary cell, the SCG configuration information for the first candidate primary secondary cell being a delta configuration based on the first reference configuration information; and the master node delivering second reference configuration information and RRC messages corresponding to the N candidate primary secondary cells to a terminal, where the second reference configuration information includes the first reference configuration information. In this application, the overhead of RRC signaling transmission and terminal storage is reduced in continuous CPAC.

Description

[Technical Field]

[0001] This application relates to the field of communication technologies, and in particular to cell configuration methods and devices. [Background technology]

[0002] Rel-17 (the third version of the global 5G standard: Rel-17) introduces a conditional primary / secondary cell addition / change (CPAC) mechanism. The corresponding trigger node (master node / secondary node) may prepare multiple candidate primary / secondary cells in advance, and the network side sends a CPAC configuration to the terminal, including candidate cell information, measurement configuration, and handover trigger conditions.

[0003] CPAC After receiving the configuration, if the terminal finds that the signal quality of the candidate cell meets the handover trigger conditions, the terminal uses the candidate cell as the target cell and performs random access to the target cell to perform the primary / secondary cell addition or change procedure. In the basic primary / secondary cell addition / change process, the network side indicates one target candidate cell. In the conditional primary / secondary cell addition / change process, the network side indicates multiple candidate cells, and the terminal obtains the candidate cell that meets the conditions through evaluation as the target cell and starts accessing the target cell. After successfully performing the primary / secondary cell addition / change, the terminal releases the stored CPAC configuration.

[0004] In the Rel-17 MN-triggered CPC and CPA procedures, the master node does not provide the SCG configuration to the candidate secondary node, and the candidate secondary node provides the master node with the full SCG configuration corresponding to the candidate primary / secondary cell. The master node distributes the full configuration to the terminal, and the terminal then accesses the candidate primary / secondary cell based on the full configuration. However, continuing to use the full configuration of the existing procedure during successive CPAC procedures may cause significant overhead in signaling transmission and terminal storage. Summary of the Invention

[0005] This application provides a cell configuration method and device to solve the problem that the overhead of signaling transmission and terminal storage is very large in the current continuous CPAC process.

[0006] According to a first aspect, the present application provides a cell configuration method, including:

[0007] The master node determines M candidate primary and secondary cells, where M is a positive integer. The master node first obtains the reference configuration information. the master node obtains RRC messages corresponding to N candidate primary secondary cells, where N is a positive integer, the N candidate primary secondary cells are included in the M candidate primary secondary cells, the RRC message of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information; The master node delivers, to the terminal, second reference configuration information and an RRC message corresponding to the N candidate primary and secondary cells, where the second reference configuration information includes the first reference configuration information.

[0008] In this embodiment, M candidate primary and secondary cells are determined, and second reference configuration information and RRC messages corresponding to the N candidate primary and secondary cells are delivered to the terminal. The terminal determines configuration information used to access the first candidate primary and secondary cell based on the second reference configuration information and the RRC message of the first candidate primary and secondary cell using a delta configuration method for the RRC message of the first candidate primary and secondary cell. Therefore, during the continuous CPAC process, RRC signaling transmission and terminal storage overhead are reduced using the delta configuration method.

[0009] In addition, the terminal sends an RRC message to the first candidate primary / secondary cell in a delta configuration manner, so that after the terminal is handed over from the current primary / secondary cell to the first candidate primary / secondary cell, the terminal only needs to perform PDCP recovery if an intra-station primary / secondary cell change is performed, and the terminal only needs to perform PDCP re-establishment if an inter-station primary / secondary cell change is performed.

[0010] Therefore, compared to when the current terminal hands over from the current primary / secondary cell to the first candidate cell, only the RRC messages of the first candidate primary / secondary cell in the full configuration method need to be used, and only the PDCP release and re-add method needs to be performed, so this embodiment reduces the interruption time of user plane data and avoids data packet loss.

[0011] In a possible implementation, the master node obtaining the first reference setting information includes:

[0012] The master node receives first reference configuration information from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary-secondary cells.

[0013] In a possible implementation, receiving the first reference configuration information from the first candidate secondary node includes receiving the first reference configuration information from the first candidate secondary node in response to a first message sent to the first candidate secondary node, the first message being used to request the first reference configuration information.

[0014] The first message is sent to the first candidate secondary node to implement the targeted trigger of the first candidate secondary node and obtain the first reference configuration information of the first candidate secondary node, which helps the master node obtain the first reference configuration information based on requirements.

[0015] In a possible implementation, the master node receives one or more SCG configurations from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary-secondary cells, the one or more SCG configurations being full configurations, where M is a positive integer; The master node determines the first reference configuration information based on one or more SCG configurations.

[0016] By receiving one or more SCG configurations and determining first reference configuration information based on the one or more SCG configurations, the master node determines the first reference configuration information required by the master node based on the obtained SCG configurations, thereby expanding the scope of application.

[0017] In a possible implementation, receiving one or more SCG configurations from the first candidate secondary node includes receiving one or more SCG configurations from the first candidate secondary node in response to a secondary node addition request message sent to the first candidate secondary node, where the secondary node addition request message is used to request the one or more SCG configurations, and the one or more SCG configurations are SCG configurations corresponding to one or more candidate primary secondary cells assigned to the UE by the first candidate secondary node.

[0018] The technical effect of sending a Secondary Node Addition Request message to a first candidate secondary node and obtaining one or more SCG configurations of the first candidate secondary node is to help the master node determine first reference configuration information based on the SCG configuration obtained in the existing secondary node addition procedure.

[0019] In a possible implementation, the master node obtaining the first reference setting information includes:

[0020] The master node receives first reference configuration information from a source secondary node, where the source secondary node is a secondary node corresponding to a primary secondary cell currently being accessed by the terminal.

[0021] In a possible implementation, receiving the first reference configuration information from the source secondary node includes receiving the first reference configuration information from the source secondary node in response to a second message sent to the source secondary node, the second message being used to request the first reference configuration information.

[0022] In a possible implementation, the master node obtaining the first reference setting information includes:

[0023] The master node receives an SCG configuration from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently accessed by the terminal, and the SCG configuration of the source secondary node may be an SCG full configuration configured for the terminal; The master node determines the first reference configuration information based on the SCG configuration from the source secondary node.

[0024] In a possible implementation, receiving the SCG configuration from the source secondary node includes receiving the SCG configuration from the source secondary node in response to a third message sent to the source secondary node, the third message being used to request a current SCG configuration of the terminal.

[0025] First reference configuration information is obtained and provided for the candidate secondary node, so that the candidate secondary node may prepare an RRC message for the candidate PSCell based on the first reference configuration information. In this way, the RRC message for the candidate PSCell is delivered to the terminal in a delta configuration format, further reducing RRC signaling transmission and storage overhead.

[0026] According to a second aspect, the present application provides a cell configuration method, including:

[0027] the master node receives K pieces of first reference configuration information and N RRC messages from K candidate secondary nodes, K is a positive integer, N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more RRC messages, the RRC message of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of a first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node; The master node distributes second reference configuration information and RRC information of the N candidate primary and secondary cells to the terminal, and the second reference configuration information includes the K first reference configuration information.

[0028] In this embodiment, K pieces of first reference configuration information and N pieces of RRC messages are received from K candidate secondary nodes to obtain the first reference configuration information and the RRC messages of each candidate secondary node.

[0029] The second reference configuration information and an RRC message corresponding to the N candidate primary and secondary cells are delivered to the terminal.

[0030] First indication information is delivered to the terminal, and the first indication information indicates an RRC message of K pieces of first reference configuration information and N candidate primary / secondary cells, or indicates a correspondence between the K pieces of first reference configuration information and N candidate primary / secondary cells.

[0031] In this way, when the terminal accesses the first candidate primary / secondary cell, if the first reference configuration information corresponding to the first candidate primary / secondary cell is the same as the currently applied first reference configuration information, the terminal determines that the change from the current primary / secondary cell to the first candidate primary / secondary cell is an intra-station primary / secondary cell change, and the terminal only needs to perform PDCP recovery; or, if the first reference configuration information corresponding to the first candidate primary / secondary cell is different from the currently applied first reference configuration information, the terminal determines that the change from the current primary / secondary cell to the first candidate primary / secondary cell is an inter-station primary / secondary cell change, and the terminal only needs to perform PDCP re-establishment.

[0032] Therefore, compared with the current method in which a full configuration needs to be used when a terminal is handed over from a current primary / secondary cell to a first candidate cell, and therefore PDCP release and re-addition need to be performed, in this embodiment, only PDCP recovery or PDCP re-establishment needs to be performed, thereby reducing RRC signaling and storage overhead. In addition, compared with the PDCP release and re-addition described in the prior art, in this embodiment, the terminal accesses the first candidate primary / secondary cell based on PDCP recovery or PDCP re-establishment, thereby reducing the interruption time of user plane data and avoiding data packet loss.

[0033] In a possible implementation, receiving the K first reference configuration information and the N RRC messages from the K candidate secondary nodes includes responding to secondary node addition request information sent separately to the L candidate secondary nodes, and the K candidate secondary nodes are included in the L candidate secondary nodes.

[0034] According to a third aspect, the present application provides a cell configuration method, including:

[0035] a terminal receives second reference configuration information from a master node and RRC messages corresponding to N candidate primary / secondary cells, where N is a positive integer, the RRC message of a first candidate primary / secondary cell among the N candidate primary / secondary cells includes SCG configuration information of the first candidate primary / secondary cell, the SCG configuration information of the first candidate primary / secondary cell is a delta configuration based on the first reference configuration information, and the second reference configuration information includes the first reference configuration information; The terminal determines third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and the terminal accesses the first candidate primary / secondary cell based on the third configuration information.

[0036] In a possible implementation aspect, the terminal determines third configuration information based on the second reference configuration information and an RRC message of the first candidate primary secondary cell, and the terminal accesses the first candidate primary secondary cell based on the third configuration information. When the terminal determines that the first candidate primary / secondary cell satisfies a corresponding execution trigger condition, the terminal accesses the first candidate primary / secondary cell based on the second reference configuration information and an RRC message of the first candidate primary / secondary cell.

[0037] According to a fourth aspect, the present application provides a cell configuration method, including:

[0038] the terminal receives second reference configuration information from the master node and RRC messages of N candidate primary secondary cells, the second reference configuration information including K first reference configuration information, K being a positive integer and N being a positive integer, one candidate secondary node corresponding to one first reference configuration information and one or more RRC messages, the RRC message of a first candidate primary secondary cell among the N candidate primary secondary cells including SCG configuration information of the first candidate primary secondary cell, the SCG configuration information of the first candidate primary secondary cell being a delta configuration based on the first reference configuration information of the first candidate secondary node; The terminal determines third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and the terminal accesses the first candidate primary / secondary cell based on the third configuration information.

[0039] In a possible implementation aspect, determining third configuration information based on the second reference configuration information and an RRC message of the first candidate primary / secondary cell by the terminal includes: When the terminal determines that the first candidate primary / secondary cell satisfies a corresponding execution trigger condition, the terminal determines third configuration information based on first reference configuration information that is in the second reference configuration message and corresponds to the first candidate primary / secondary cell and the RRC message of the first candidate primary / secondary cell.

[0040] In a possible implementation aspect, determining whether the change is an intra-station primary / secondary cell change or an inter-station primary / secondary cell change based on first reference configuration information in the second reference configuration message and corresponding to the first candidate primary / secondary cell and the RRC message of the first candidate primary / secondary cell includes: If the terminal determines that the first reference configuration information corresponding to the first candidate primary / secondary cell is the same as the first reference configuration information applied by the terminal, the terminal determines that an intra-station primary / secondary cell change is performed; or The method includes determining, by the terminal, that an inter-station primary / secondary cell change is to be performed when the terminal determines that first reference configuration information corresponding to the first candidate primary / secondary cell is different from the first reference configuration information applied by the terminal.

[0041] According to a fifth aspect, the present application provides a cell configuration method, including:

[0042] K candidate secondary nodes send K pieces of first reference configuration information and N RRC messages to the master node, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more RRC messages, the RRC message of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

[0043] In a possible implementation, transmitting the K first reference configuration information and the N RRC messages to the master node includes responding to secondary node additional information received from the master node.

[0044] According to a sixth aspect, the present application provides a master node including a first receiver and a first transmitter; the first receiver is configured to determine M candidate primary and secondary cells, where M is a positive integer; the first receiver is further configured to obtain first reference setting information; the first receiver is further configured to obtain RRC messages corresponding to N candidate primary secondary cells, where N is a positive integer, the N candidate primary secondary cells are included in the M candidate primary secondary cells, the RRC message of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information; The first transmitter is configured to deliver, to the terminal, second reference configuration information and an RRC message corresponding to the N candidate primary and secondary cells, where the second reference configuration information includes the first reference configuration information.

[0045] In a possible implementation, the first receiver is further configured to receive first reference configuration information from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary-secondary cells.

[0046] In a possible implementation, the first receiver is further configured to receive first reference configuration information from the first candidate secondary node in response to a first message sent to the first candidate secondary node, the first message being used to request the first reference configuration information.

[0047] In a possible implementation, the first receiver is configured to receive one or more SCG configurations from a first candidate secondary node, the first candidate secondary node is configured to manage one or more of the M candidate primary-secondary cells, the one or more SCG configurations are full configurations, and M is a positive integer; The first receiver is further configured to determine first reference setting information based on the one or more SCG settings.

[0048] In a possible implementation, the first receiver is further configured to receive one or more SCG configurations from the first candidate secondary node in response to a secondary node addition request message sent to the first candidate secondary node, the secondary node addition request message being used to request the one or more SCG configurations.

[0049] In a possible implementation, the first receiver is further configured to receive first reference configuration information from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently being accessed by the terminal.

[0050] In a possible implementation, the first receiver is further configured to receive first reference configuration information from the source secondary node in response to a second message sent to the source secondary node, the second message being used to request the first reference configuration information.

[0051] In a possible implementation, the first receiver is further configured to receive an SCG configuration from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently accessed by the terminal, and the SCG configuration of the source secondary node being a full configuration; The first receiver is further configured to determine first reference configuration information based on an SCG configuration from the source secondary node.

[0052] In a possible implementation, the first receiver is further configured to receive an SCG configuration from the source secondary node in response to a third message sent to the source secondary node, the third message being used to request a current SCG configuration of the terminal.

[0053] According to a ninth aspect, the present application provides a master node including a second receiver and a second transmitter; the second receiver is configured to receive K pieces of first reference configuration information and N pieces of RRC messages from K candidate secondary nodes, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more RRC messages, the RRC message of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of a first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node; The second transmitter is configured to deliver second reference configuration information and RRC messages of the N candidate primary and secondary cells to the terminal, where the second reference configuration information includes the K first reference configuration information.

[0054] In a possible implementation, the second receiver is further configured to receive K pieces of first reference configuration information and N RRC messages from K candidate secondary nodes in response to secondary node addition request information separately transmitted to the L candidate secondary nodes, where the K candidate secondary nodes are included in the L candidate secondary nodes.

[0055] According to a ninth aspect, the present application provides a terminal including a third receiver and a third transmitter; the third receiver is configured to receive second reference configuration information from the master node and RRC messages corresponding to N candidate primary / secondary cells, where N is a positive integer, the RRC message of a first candidate primary / secondary cell among the N candidate primary / secondary cells includes SCG configuration information of the first candidate primary / secondary cell, the SCG configuration information of the first candidate primary / secondary cell is a delta configuration based on the first reference configuration information, and the second reference configuration information includes the first reference configuration information; The third transmitter, when it is determined that the first candidate primary / secondary cell satisfies the corresponding execution trigger condition, On your device, accessing the first candidate primary / secondary cell based on the first reference configuration information and the RRC message of the first candidate primary / secondary cell; to make It is further structured as follows.

[0056] In a possible implementation, the third transmitter, when it is determined that the first candidate primary secondary cell satisfies a corresponding execution trigger condition, On your device, accessing the first candidate primary / secondary cell based on the first reference configuration information and the RRC message of the first candidate primary / secondary cell; to make It is further structured as follows.

[0057] According to a ninth aspect, the present application provides a terminal including a fourth receiver and a fourth transmitter; the fourth receiver is configured to receive second reference configuration information from the master node and RRC messages of the N candidate primary secondary cells, the second reference configuration information including K first reference configuration information, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one first reference configuration information and one or more RRC messages, the RRC message of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node; The fourth transmitter is configured to determine third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and the fourth transmitter is further configured to access the first candidate primary / secondary cell based on the third configuration information.

[0058] In a possible implementation, the fourth transmitter, when it is determined that the first candidate primary secondary cell satisfies a corresponding execution trigger condition, No. and determining third configuration information based on the first reference configuration information in the second reference configuration message and corresponding to the first candidate primary secondary cell and the RRC message of the first candidate primary secondary cell.

[0059] In a possible implementation, the fourth transmitter is further configured to determine that an intra-station primary / secondary cell change is performed when it is determined that the first reference configuration information corresponding to the first candidate primary / secondary cell is the same as the first reference configuration information applied by the terminal; and The fourth transmitter is further configured to determine that an inter-station primary-secondary cell change is to be performed when it is determined that the first reference configuration information corresponding to the first candidate primary-secondary cell is different from the first reference configuration information applied by the terminal.

[0060] According to a tenth aspect, the present application provides a secondary node including a fifth transmitter; the fifth receiver is configured to send K first reference configuration information and N RRC messages to the master node, where K is a positive integer; N is a positive integer, one candidate secondary node corresponds to one first reference configuration information and one or more RRC messages, the RRC message of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

[0061] In a possible implementation, the fifth transmitter is further configured to respond to secondary node additional information received from the master node.

[0062] According to an eleventh aspect, the present application provides a master node including at least one processing element or chip configured to perform any one of the implementation aspects of the first and second aspects.

[0063] According to a twelfth aspect, the present application provides a computer program product including program code, the program code being configured to, when executed by a computer, perform any one of the implementations of the first and second aspects.

[0064] According to a thirteenth aspect, the present application provides a computer-readable storage medium including the program according to the twelfth aspect.

[0065] According to a fourteenth aspect, the present application provides a terminal including at least one processing element or chip configured to perform any one of the implementation aspects of the third and fourth aspects.

[0066] According to a fifteenth aspect, the present application provides a computer program product including program code, the program code being configured to, when executed by a computer, perform any one of the implementation aspects of the third and fourth aspects.

[0067] According to a sixteenth aspect, the present application provides a computer-readable storage medium including the program according to the fifteenth aspect.

[0068] According to a seventeenth aspect, the application provides a secondary node including at least one processing element or chip configured to perform the fifth aspect.

[0069] According to an eighteenth aspect, the present application provides a computer program product including program code that, when executed by a computer, is configured to perform an implementation of the fifth aspect.

[0070] According to a nineteenth aspect, the present application provides a computer-readable storage medium including the program according to the eighteenth aspect.

[0071] According to a twentieth aspect, there is provided a communication system. The system includes a master node according to the first aspect, the second aspect, or any one of the possible implementations of the first and second aspects. The system further includes a terminal according to the third aspect, the fourth aspect, or any one of the possible implementations of the third and fourth aspects. The system further includes at least one secondary node according to the fifth aspect or any one of the possible implementations of the fifth aspect.

[0072] This application provides a cell configuration method and device. RRC messages corresponding to second reference configuration information and N candidate primary and secondary cells are delivered to a terminal, so that the terminal determines third configuration information used to access the first candidate primary and secondary cell based on the second reference configuration information and the RRC message for delta configuration of the first candidate primary and secondary cell, thereby achieving the technical effect of performing CPAC based on the delta configuration. Therefore, during the process of successive CPAC, RRC signaling transmission and terminal storage overhead are reduced using the delta configuration method. [Brief explanation of the drawings]

[0073] [Figure 1] 1 is a diagram of an application scenario according to one embodiment of this application.

[0074] [Figure 2] 1 is a diagram of a networking architecture according to one embodiment of the present application.

[0075] [Figure 3] FIG. 1 is a diagram of an architecture of an MR-DC control plane according to one embodiment of this application.

[0076] [Figure 4] A diagram of the protocol stacks of the MCG bearer, SCG bearer, and split bearer on the network side in the EN-DC according to one embodiment of this application.

[0077] [Figure 5] This is a diagram of the protocol stacks for the MCG bearer, SCG bearer, and split bearer on the network side in NGEN-DC / NE-DC / NR-DC according to one embodiment of this application.

[0078] [Figure 6A]1 is a signaling diagram of a conditional primary-secondary cell addition / change mechanism according to this application. [Figure 6B] 1 is a signaling diagram of a conditional primary-secondary cell addition / change mechanism according to this application.

[0079] [Figure 7A] FIG. 2 is a signaling diagram of a cell configuration method according to an embodiment of the present application; [Figure 7B] FIG. 2 is a signaling diagram of a cell configuration method according to an embodiment of the present application; [Figure 7C] FIG. 2 is a signaling diagram of a cell configuration method according to an embodiment of the present application; [Figure 7D] FIG. 2 is a signaling diagram of a cell configuration method according to an embodiment of the present application;

[0080] [Figure 8] FIG. 10 is a signaling diagram of another cell configuration method according to an embodiment of the present application;

[0081] [Figure 9] 1 is a diagram of a master node structure according to one embodiment of the present application.

[0082] [Figure 10] FIG. 10 is a diagram of another master node structure according to an embodiment of the present application.

[0083] [Figure 11] 1 is a diagram of the structure of a terminal according to an embodiment of the present application;

[0084] [Figure 12] FIG. 10 is a diagram of another terminal structure according to an embodiment of the present application.

[0085] [Figure 13] 1 is a diagram of a secondary node structure according to one embodiment of the present application.

[0086] [Figure 14] 1 is a diagram of a master node structure according to one embodiment of the present application.

[0087] [Figure 15] 1 is a diagram of a master node structure according to one embodiment of the present application.

[0088] [Figure 16] 1 is a diagram of the structure of a terminal according to an embodiment of the present application;

[0089] [Figure 17] 1 is a diagram of the structure of a terminal according to an embodiment of the present application;

[0090] [Figure 18] 1 is a diagram of a secondary node structure according to one embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0091] Embodiments of this application may apply to a 4G (fourth generation) system, a 5G (fifth generation) system, an NTN (non-terrestrial network) system, or a future mobile communication system, or to another communication system, such as a wireless local area network (WLAN) system, a global system of mobile communication (GSM), a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a universal mobile telecommunication system (UMTS), a worldwide interoperability for microwave access (WiMAX) communication system, and new radio (NR).

[0092] In order to facilitate the understanding of those skilled in the art, some terms in this application will be explained below. It should be noted that when the solutions in the embodiments of this application are applied to a 5G system, an existing system, or another system that may appear in the future, the names of network devices, core network devices, application network elements, and terminal devices may be changed, but this does not affect the implementation of the solutions in the embodiments of this application.

[0093] (1) A terminal, also referred to as user equipment (UE), mobile station (MS), or mobile terminal (MT), is a device that provides voice and / or data connectivity to a user, such as a handheld device or an in-vehicle device with wireless connectivity. Currently, some examples of terminals include mobile phones, tablet computers, notebook computers, palmtop computers, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes. A terminal may include multiple SIMs.

[0094] (2) An access network device is a radio access network (RAN) node (or device) that connects a terminal to a wireless network, and may also be referred to as a base station. Currently, some examples of access network devices include the following: a generation NodeB (gNodeB), a transmission reception point (TRP), an evolved NodeB (eNB), a radio network controller (RNC), a NodeB (NodeB, NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved NodeB or Home NodeB, HNB), a baseband unit (BBU), and a wireless fidelity (Wi-Fi) access point (AP). Additionally, in the network structure, the access network device may include a RAN device including a central unit (CU) node, a distributed unit (DU) node, or a CU node and a DU node. The RAN device including the CU node and the DU node separates the protocol layers of the gNB in ​​the NR system. Some protocol layer functions are controlled by the CU in a centralized manner. Some or all of the remaining protocol layer functions are distributed to the DU, and the CU controls the DU in a centralized manner. In one implementation (FIG. 4), the radio resource control (RRC) layer, PDCP layer, and service data adaptation protocol (SDAP) layer in the protocol stack are deployed in the CU.The radio link control (RLC) layer, media access control (MAC) layer, and physical layer (PHY) in the protocol stack are deployed in the DU. Therefore, the CU has RRC, PDCP, and SDAP processing capabilities. The DU has RLC, MAC, and PHY processing capabilities. It should be understood that the above functional division is merely an example and does not constitute a limitation on the CU and DU. In other words, there may be other functional division schemes between the CU and DU. Details will not be described in the embodiments of this application. The functions of the CU may be implemented by one entity or different entities. For example, the functions of the CU may be further divided. For example, the control plane (CP) and the user plane (UP) may be separated, i.e., the CU control plane (CU-CP) and the CU user plane (CU-UP) may be separated. For example, the CU-CP and the CU-UP may be implemented by different functional entities. The CU-CP and the CU-UP may be combined into the DU to jointly implement the functions of a base station. The CU's control plane, CU-CP, further includes a split architecture. In other words, the existing CU-CP is further split into CU-CP1 and CU-CP2. CU-CP1 includes various radio resource management functions, while CU-CP2 includes only RRC and PDCP-C functions (i.e., basic control plane signaling functions in the PDCP layer). In a possible implementation, the CU-CP is responsible for control plane functions, primarily including RRC and PDCP-C. PDCP-C is responsible for data encryption and decryption, integrity protection, data transmission, etc. on the control plane. The CU-UP is responsible for user plane functions, primarily including SDAP and PDCP-U. SDAP is primarily responsible for processing core network data and mapping data flows to bearers. PDCP-U is primarily responsible for data plane encryption and decryption, integrity protection, header compression, sequence number maintenance, data transmission, etc. The CU-CP and CU-UP are connected via an E1 interface.The CU-CP indicates that the gNB is connected to the core network via the Ng interface and is connected to the DU via F1-C (control plane). The CU-UP is connected to the DU via F1-U (user plane). Indeed, in another possible implementation, the PDCP-C is alternatively located within the CU-UP.

[0095] (3) A core network device is a device on a core network (CN) that provides service support to a terminal. Currently, examples of core network devices include an access and mobility management function (AMF) entity, a session management function (SMF) entity, and a user plane function (UPF) entity, but these are not listed here. An AMF entity may be responsible for access management and mobility management of terminals. An SMF entity may be responsible for session management, such as establishing a user session. A UPF entity may be a functional entity on the user plane and is primarily responsible for connecting to external networks. Note that entities in this application may also be referred to as network elements or functional entities. For example, an AMF entity may also be referred to as an AMF network element or an AMF functional entity. In another example, an SMF entity may also be referred to as an SMF network element or an SMF functional entity.

[0096] (4) "Plurality" refers to two or more, and other quantifiers have similar meanings. The term "and / or" describes an associative relationship for describing related objects and indicates that three relationships may exist. For example, A and / or B may represent the following three cases: only A exists, both A and B exist, and only B exists. The character " / " typically indicates an "or" relationship between associated objects.

[0097] (5) “Correspondence” may refer to an associated or binding relationship, and “A corresponds to B” refers to an associated or binding relationship between A and B.

[0098] Table 1 shows some English acronyms and abbreviations and the Chinese expressions / Chinese terms of the full English expressions / standard English terms in this application.

[0099] [Table 1] TIFF2026505870000027.tif217170

[0100] It should be noted that nouns or terms in the embodiments of this application may refer to each other and will not be explained again.

[0101] 1 is a diagram of an application scenario according to an embodiment of this application. As shown in FIG. 1, a master node 01 may interact with multiple secondary nodes 02, and the master node 01 may further interact with at least one terminal 03 to complete the cell configuration method in this application. 01 By terminal device 03 The master node 01 further interacts with a core network device 04.

[0102] 2 is a diagram of a networking architecture according to one embodiment of this application. The networking architecture shown in FIG. 2 mainly includes a master node 1, a secondary node 2, a terminal 3, and a core network device 4. The master node 1 and the secondary node 2 may each be an access network device. The master node 1 is a base station having signaling interaction with the core network device 4, and the secondary node 2 is a base station connected to the master node 1.

[0103] Multiple master nodes form a radio access network. The radio access network may be a 5G radio access network, another existing radio access network, or a future radio access network. In the networking architecture shown in Figure 2, multiple secondary nodes 2 communicate with a master node 1, and the master node 1 communicates with multiple terminals 3 to perform cell configuration for the terminals 3, so that the terminals 3 communicate with at least one secondary node 2.

[0104] Please refer to Figures 3, 4, and 5. This application is a technical solution based on Multi-Radio dual connectivity (MR-DC). In a wireless network, one UE may communicate with multiple base stations. This is dual connectivity (DC), also referred to as MR-DC. The multiple base stations may belong to the same RAT (Radio Access Technology) (e.g., all base stations are 4G (fourth generation) base stations or all base stations are 5G (fifth generation) base stations), or may belong to different RATs (e.g., one base station is a 4G base station and another is a 5G base station).

[0105] The network side may provide communication services to the UE by using the resources of multiple base stations to provide high-speed transmission to the UE. In DC, a base station that exchanges control plane signaling with the core network is called a master node (MN), and another base station is called a secondary node (SN). Each base station has a different RLC / MAC entity. In DC, a DRB is divided into an MCG bearer, an SCG bearer, and a split bearer. An MCG bearer means that the RLC / MAC entity of the DRB is only in the master node, an SCG bearer means that the RLC / MAC entity of the DRB is only in the secondary node, and a split bearer means that the RLC / MAC entity of the DRB is in both the master node and the secondary node.

[0106] A bearer in which PDCP is terminated on the MN is called an MN-terminated bearer (also called an MN-terminated bearer). Specifically, DL data arrives at the MN directly from the core network, is processed by the PDCP / SDAP of the MN, and then transmitted to the UE via RLC / MAC. UL data is processed by the PDCP / SDAP of the MN and then transmitted to the core network. Similarly, a bearer in which PDCP is terminated on the SN is called an SN-terminated bearer (also called an SN-terminated bearer). Specifically, DL data arrives at the SN directly from the core network, is processed by the PDCP / SDAP of the SN, and then transmitted to the UE via RLC / MAC. UL data is processed by the PDCP / SDAP of the SN and then transmitted to the core network. Additionally, in dual connectivity, both the master node and the secondary node have an RRC entity, and both may generate RRC messages (i.e., control messages, e.g., measurement messages). In addition, the secondary node may send RRC messages generated by the secondary node directly to the UE (in this case, RRC messages sent by the UE to the secondary node are also sent directly to the secondary node. RRC messages exchanged directly between the secondary node and the UE are called SRB3s). Alternatively, RRC messages generated by the secondary node may be notified to the master node, and the master node sends the RRC messages to the UE (in this case, the UE also forwards RRC messages sent to the secondary node to the secondary node via the master node. Specifically, the UE sends RRC messages to the master node, and the master node forwards the messages to the secondary node.)

[0107] MR-DCs include various DCs such as EN-DCs, NGEN-DCs, NE-DCs, and NR-DCs.

[0108] In EN-DC, the master node connected to the 4G core network EPC is an LTE base station eNB, and the secondary node is an NR base station gNB.

[0109] In NGEN-DC, the master node connected to the 5G core network 5GC is an LTE base station eNB, and the secondary node is an NR base station gNB.

[0110] In NE-DC, the master node connected to the 5G core network 5GC is the NR base station gNB, and the secondary node is the LTE base station ng-eNB.

[0111] In NR-DC, the master node connected to the 5G core network 5GC is an NR base station gNB, and the secondary node is an NR base station gNB.

[0112] For a UE in MR-DC, the user plane of the secondary node may be connected to a core network connected to the master node (i.e., the core network may send data directly to the UE via the secondary node).

[0113] In MR-DC, there is one primary cell in the master node and one primary-secondary cell in the secondary node. The primary cell is deployed on the dominant frequency and is the cell from which the UE initiates the initial connection establishment process or connection re-establishment process, or is the cell designated as the primary cell in the handover process. The primary-secondary cell is the cell from which the UE initiates the random access procedure to the secondary node, the cell from which the UE initiates data transmission by skipping the random access procedure in the secondary node change process, or the cell of the secondary node from which the UE initiates random access in the process of performing synchronous reconfiguration.

[0114] EN-DC is also called NSA. In the initial phase of 5G, UEs on the EN-DC network cannot camp on NR cells. NR base stations to which UEs can camp are sometimes called SA NR base stations.

[0115] See Figures 6A and 6B. Rel-17 (the third version of the global 5G standard) introduces a conditional primary and secondary cell addition / change (CPAC) mechanism. A corresponding trigger node (MN / SN) may prepare multiple PSCells in advance, and the network side sends a CPAC configuration to the UE, including candidate cell information, measurement configuration, and handover trigger conditions. CPAC After receiving the configuration information, if the UE finds that the signal characteristics of the candidate cell meet the handover trigger conditions, the UE performs random access using the candidate cell as the target cell to perform a PSCell addition or modification procedure. In the basic PSCell addition / modification process, the network side indicates one target candidate cell. In the conditional primary / secondary cell addition / modification process, the network side indicates multiple candidate cells, and the UE selects a candidate cell that meets the conditions through evaluation and uses it as the target cell. After successfully performing CPA / CPC, the UE releases the stored CPAC configuration.

[0116] CPA: Conditional Primary / Secondary Cell Addition

[0117] When a PSCell is not configured in the UE, the network side triggers PSCell addition, i.e., configures an MR-DC for the UE.

[0118] Step 1: The MN sends an Add Request message to multiple candidate SNs (T-SN 1, T-SN 2), where the request indicates a CPAC, and the request indicates one or more recommended candidate PSCells and the latest measurement results.

[0119] Step 2: If the candidate SN has access to one or more candidate PSCells prepared by the MN, one or more accepted candidate PSCells are selected and feedback is returned to the MN through an SN Addition Request Acknowledgement message, and radio resources are reserved for the UE until the MN's SN Release message is received (step 10).

[0120] Step 5: The MN sends a CPA configuration to the UE, and the message includes the wireless air interface configuration and the execution trigger conditions of all candidate SNs.

[0121] Step 6: The UE feeds back an RRC reconfiguration complete message to the MN. However, the UE does not immediately add any candidate PSCells. Instead, the UE continues to determine whether the target PSCell satisfies the execution trigger condition.

[0122] Step 9: When the UE detects that the candidate PSCell satisfies the corresponding execution trigger condition, the UE feeds back an RRC reconfiguration complete message to the MN, and indicates the selected candidate PSCell to the MN.

[0123] Step 10: The MN sends an SN release message to other candidate SNs to indicate to these base stations to release the reserved resources and buffered data.

[0124] Step 11: The MN feeds back the RRC reconfiguration completion to the SN corresponding to the selected candidate PSCell.

[0125] Step 12: The UE performs random access to the selected candidate PSCell.

[0126] The sequence in which the UE transmits the RRC reconfiguration complete message (step 9) and performs random access to the target PSCell (step 12) is not limited and is determined based on the implementation of the UE.

[0127] CPC: Conditional Primary-Secondary Cell Change

[0128] The UE has MR-DC configured (i.e., an SN exists).

[0129] Step 0: When the SN triggers the CPC, the SN sends a CPC SN change request to the MN, which may indicate one or more recommended candidate PSCells and execution trigger conditions, measurement configurations, and SCG configurations (to support the candidate incremental configuration); when the MN triggers the CPC, the MN may request the current SCG configurations from the S-SN to support the candidate incremental configurations.

[0130] Step 1: The MN sends an additional request to multiple candidate SNs (T-SN 1 and T-SN 2), where the request indicates a CPAC, and the request message indicates one or more prepared candidate PSCells, the maximum number of PSCells that can be prepared by the candidate SNs, and the latest measurement results, and further provides an SCG configuration (so that the T-SNs provide an SCG incremental configuration corresponding to the candidate PSCells by using the SCG configuration as a baseline).

[0131] Step 2: If the candidate SN has access to one or more candidate PSCells prepared by the MN, one or more accepted candidate PSCells are selected and feedback is returned to the MN through an SN addition request acknowledgement message, reserving radio resources for the UE until the MN's SN release message is received (step 10). The SN addition request acknowledgement message further includes an SCG configuration corresponding to the candidate PSCell. Based on the SCG configuration in step 1, the candidate SN prepares an SCG configuration corresponding to the candidate PSCell based on an RRC configuration type of delta config. If no SCG configuration is provided in step 1, the candidate SN prepares an SCG configuration corresponding to the candidate PSCell based on an RRC configuration type of full config.

[0132] Steps 3 and 4: (Optional) In an SN-triggered procedure, the MN may indicate one or more candidate PSCell source SNs that have been accepted by the candidate SN, and the source SN may provide the MN with updated measurement configurations and / or execution trigger conditions.

[0133] Step 5: The MN sends a CPC configuration to the UE, and the message includes the execution trigger conditions and wireless air interface configurations of all candidate SNs.

[0134] Step 6: The UE feeds back an RRC reconfiguration complete message to the MN. However, the UE does not immediately add any candidate PSCells. Instead, the UE continues to determine whether the target PSCell satisfies the execution trigger condition.

[0135] Step 7: The MN notifies the source SN that a CPC has been configured for the UE, and the source SN initiates early data transfer. In the SN-triggered procedure, if steps 3 and 4 are skipped, the MN may further indicate to the source SN one or more candidate PSCells that have been accepted by the candidate SNs.

[0136] Step 8: (Optional) In an SN-triggered procedure, the source SN may provide updated measurement configurations and / or execution trigger conditions to the MN, and the MN reconfigures the UE as described in steps 5 and 6.

[0137] Step 9: When the UE detects that the candidate PSCell satisfies the corresponding execution trigger condition, the UE feeds back an RRC reconfiguration complete message to the MN, and indicates the selected candidate PSCell to the MN.

[0138] Step 10: The MN sends an SN release message to the source SN to indicate to the source SN to stop data transmission with the UE and to perform subsequent data transfer with the SN corresponding to the selected candidate PSCell, and the MN sends an SN release message to other candidate SNs to indicate to the other candidate SNs to release reserved resources and buffered data.

[0139] Step 11: The MN feeds back the RRC reconfiguration completion to the SN corresponding to the selected candidate PSCell.

[0140] Step 12: The UE performs random access to the selected candidate PSCell. The sequence in which the UE transmits the RRC reconfiguration complete message (step 9) and performs random access to the target PSCell (step 12) is not limited and is determined based on the implementation of the UE.

[0141] However, Rel-17 introduces the Conditional Primary / Secondary Cell Addition / Change (CPAC) mechanism. In the Rel-17 MN-triggered CPC and CPA procedures, the master node does not provide the candidate secondary node with the SCG configuration, and the candidate secondary node provides the master node with the full SCG configuration corresponding to the candidate primary / secondary cell. The master node distributes the full configuration to the terminal, and the terminal then accesses the candidate primary / secondary cell based on the full configuration. However, during successive CPAC procedures, the overhead of signaling transmission and terminal storage may be large when the full configuration of the existing procedure is currently used.

[0142] Additionally, because primary / secondary cell addition / change in Rel-17 CPAC only needs to be performed once, the UE releases the candidate cell configuration used for conditional execution after the primary / secondary cell addition is completed. In Rel-18 (the first version of the 5G-Advanced Rel-18 standard), to support continuous primary / secondary cell addition / change, after the initial primary / secondary cell addition (from no primary / secondary cell to primary / secondary cell #1) is performed based on the full configuration, the full configuration is then used for subsequent primary / secondary cell changes (such as, but not limited to, from primary / secondary cell #1 to primary / secondary cell #2, and from primary / secondary cell #n to primary / secondary cell #m). As a result, the UE needs to continue to store the SCG configuration of the candidate PSCell. This would result in excessive UE storage overhead when the full configuration is applied. In addition, when full configuration is applied and a conditional primary / secondary cell addition / change is performed, the Packet Data Convergence Protocol (PDCP) entity is released and re-added. This results in a long interruption of user plane data and data packet loss issues. The data packet loss issue typically occurs when the scheduling interval is greater than the PDCP timer and the timer expires. After the timer expires, the base station actively discards packets.

[0143] In this application, M candidate primary and secondary cells are determined, and second reference configuration information and RRC messages corresponding to the N candidate primary and secondary cells are delivered to the terminal. As a result, the terminal can access the first candidate primary and secondary cell based on the second reference configuration information and the RRC message of the first candidate primary and secondary cell and the delta configuration of the RRC message of the first candidate primary and secondary cell. After accessing the first candidate primary and secondary cell, the terminal continues to evaluate another candidate primary and secondary cell and accesses the other candidate primary and secondary cell based on the RRC message of the delta configuration of the other candidate primary and secondary cell. Therefore, the overhead of RRC signaling transmission and terminal storage is reduced by continuous CPAC in the delta configuration method.

[0144] The present invention is primarily applicable to 4G (fourth generation) systems, 5G (fifth generation) systems, NTN (non-terrestrial network) systems or future mobile communication systems, but may alternatively be applied to other communication systems as long as an entity in the communication system needs to transmit information and another entity needs to receive information.

[0145] 7A to 7D are signaling diagrams of a cell configuration method according to an embodiment of this application. As shown in FIG. 7A to 7D, the method includes the following steps:

[0146] S101: The master node determines M candidate primary and secondary cells, where M is a positive integer.

[0147] In this embodiment, the candidate primary secondary cell is a primary secondary cell in a candidate secondary node, and the candidate secondary node is a secondary node that can be accessed by a terminal. Specifically, in MR-DC, there is one primary cell (Primary Cell, PCell) in the master node and one primary secondary cell (Primary secondary cell) in the secondary node. The primary cell is deployed on a dominant frequency and is a cell from which a terminal initiates an initial connection establishment procedure or a connection re-establishment procedure, or is a cell designated as a primary cell in a handover procedure. The primary secondary cell is a cell from which a terminal initiates a random access procedure to a secondary node, a cell from which a terminal initiates data transmission by skipping the random access procedure in a secondary node change process, or a cell of a secondary node from which a UE initiates random access in a process of performing synchronous reconfiguration.

[0148] S102a: The master node sends a first message to a first candidate secondary node, the first message being used to request the first candidate secondary node to provide first reference configuration information.

[0149] For example, the master node may send a first message to one candidate secondary node, the first message being used to request the candidate secondary node to provide a reference setting, and the first message may be information carrying an instruction to request the first candidate secondary node to return the first reference setting information.

[0150] The first message may include candidate primary / secondary cell information, and the first message may further include candidate secondary node addition request information, which is used to request the candidate secondary node to allocate resources to the terminal.

[0151] The first message is sent to the first candidate secondary node to implement the targeted trigger of the first candidate secondary node and obtain the first reference configuration information of the first candidate secondary node, which helps the master node obtain the first reference configuration information based on requirements.

[0152] S102b: The master node sends a secondary node addition request message to the first candidate secondary node, and the secondary node addition request message is used to request the first candidate secondary node to provide one or more SCG configuration information.

[0153] For example, the master node may send a secondary node addition request message to one candidate secondary node, and the secondary node addition request message may be information carrying instructions to request the first candidate secondary node to return one or more SCG configuration information.

[0154] The technical effect of sending a Secondary Node Addition Request message to a first candidate secondary node and obtaining one or more SCG configurations of the first candidate secondary node is to help the master node determine first reference configuration information based on the SCG configuration obtained in the existing secondary node addition procedure.

[0155] S102c: The master node sends a second message to the source secondary node, where the second message is used to request the source secondary node to provide the first reference configuration information.

[0156] For example, the master node may send a second message to one candidate secondary node, the second message being used to request the source secondary node to provide a reference setting, and the second message may carry information carrying instructions to request the source secondary node to return the first reference setting information.

[0157] The second message is sent to the source secondary node, which has the technical effect of triggering the source secondary node to prepare the first reference configuration information and obtaining the first reference configuration information provided by the source secondary node, which helps the master node determine the first reference configuration information.

[0158] S102d: The master node sends a third message to the source secondary node, where the third message is used to request the source secondary node to provide the current SCG setting of the terminal.

[0159] For example, the master node may send a third message to the source secondary node, and the third message may be information carrying an instruction to request the source secondary node to return the SCG full configuration information currently applied to the UE by the terminal.

[0160] The third message is sent to the source secondary node to achieve the technical effect of triggering the source secondary node to obtain the SCG configuration of the source secondary node, which helps the master node determine the first reference configuration information.

[0161] S103: The master node obtains the first reference setting information.

[0162] For example, the first reference configuration information may include SCG configuration information, and the first reference configuration may further include one or more of MCG configuration information and candidate primary / secondary cell execution trigger conditions. Alternatively, the first reference configuration may be an independent RRC reconfiguration message or may be included in consecutive CPAC-configured RRC reconfiguration messages.

[0163] Note that after a UE successfully performs CPA / CPC in Rel-17, the UE releases the stored CPAC configuration and does not continue to evaluate the execution trigger conditions for the candidate cell. Currently, in Rel-18, a solution is being discussed to support the selective activation agenda, i.e., continuous conditional primary / secondary cell change and / or primary / secondary cell addition (primary / secondary cell change / addition may also be referred to as SCG change / addition). In other words, after the network configures the UE to reconfigure the candidate primary / secondary cell conditions, after the UE performs the primary / secondary cell addition or change, the UE stores the candidate primary / secondary cell condition reconfiguration and continues to evaluate whether the candidate cell execution trigger conditions are met before adding or changing the primary / secondary cell. Therefore, the network does not need to re-distribute the CPA / CPC configuration to the UE for subsequent primary / secondary cell additions or changes.

[0164] At RAN2 Meeting #119, it was agreed to support the use of the delta configuration RRC configuration type for RRC messages corresponding to candidate primary / secondary cells and confirmed that the terminal may store the reference configuration separately. This indicates that the candidate secondary node must first generate a delta configuration SCG configuration based on the reference configuration. If the SCG configuration of a candidate primary / secondary cell is a delta configuration, the RRC message corresponding to the candidate cell has a delta configuration RRC configuration type. Then, when the terminal evaluates candidate primary / secondary cells that satisfy the execution trigger condition, the terminal first applies the reference configuration and then applies the delta configuration corresponding to the candidate primary / secondary cell. In this way, the terminal can apply the full configuration of the candidate primary / secondary cell, thereby completing synchronization and random access with the candidate primary / secondary cell. Compared to the full configuration, the incremental configuration reduces signaling transmission and storage overhead.

[0165] Specifically, the master node obtains the first reference setting information, which includes the following:

[0166] S103a: The master node receives first reference configuration information from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary-secondary cells.

[0167] For example, the candidate secondary node prepares a delta configuration corresponding to the candidate primary-secondary cell based on the reference configuration. In this embodiment, all candidate secondary nodes prepare the same first reference configuration information. The first reference configuration information includes SCG configuration information, and may further include one or more of an MCG configuration, an execution trigger condition corresponding to the candidate primary-secondary cell, and a measurement configuration corresponding to the candidate primary-secondary cell.

[0168] For example, the candidate secondary node may indicate first reference configuration information to the master node based on the first message, and the candidate secondary node may further indicate an RRC message corresponding to the candidate primary-secondary cell based on the first message.

[0169] Specifically, the candidate secondary node prepares first reference configuration information based on the first message and indicates the first reference configuration information to the master node. If the first message of S102a includes secondary node addition request message information, the candidate secondary node prepares an RRC message for delta configuration corresponding to the candidate primary-secondary cell based on the secondary node addition request message information and the first reference configuration information in the first message and indicates the RRC message to the master node.

[0170] Specifically, the master node obtains the first reference setting information, which includes the following:

[0171] S103b: The master node receives one or more SCG configurations from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary-secondary cells, the one or more SCG configurations being full configurations, and M being a positive integer.

[0172] The master node determines the first reference configuration information based on one or more SCG configurations.

[0173] For example, the one or more SCG configurations may correspond to one or more candidate primary / secondary cells and may be SCG full configurations provided by a first candidate secondary node to a terminal, and the SCG full configurations corresponding to the one or more candidate primary / secondary cells may be used by the terminal to access the candidate primary / secondary cells provided by the first candidate secondary node.

[0174] For example, after determining the first reference configuration information, the master node provides an RRC message to the first candidate secondary node to request a delta configuration of one or more candidate primary-secondary cells.

[0175] For example, the master node determines the reference configuration based on the SCG configuration corresponding to the candidate primary secondary cells and provided by the first candidate secondary node. The master node sends a candidate secondary node addition request to the first candidate secondary node, which is used to request resource allocation to the terminal. The candidate secondary node indicates to the master node one or more accepted candidate primary secondary cells and RRC configuration information corresponding to the candidate primary secondary cells, where the RRC configuration information corresponding to the candidate primary secondary cells includes the SCG full configuration. The master node determines the reference configuration based on the SCG full configuration and provides the reference configuration to all candidate secondary nodes or to candidate secondary nodes other than the candidate secondary node.

[0176] Optionally, the master node obtains a first common parameter set set by one secondary node (secondary cell group), and determines reference configuration information based on the first common parameter set, where the first common parameter set includes a parameter set of the SCG configuration information.

[0177] The master node obtains the first parameter set configured by one secondary node (secondary cell group), determines the reference configuration information, and provides the reference configuration information to the candidate primary-secondary node. The candidate primary-secondary node determines the second parameter set based on the first parameter set, and the second parameter set is used to prepare the SCG configuration of the delta configuration of the candidate primary-secondary cell.

[0178] The master node provides a second common parameter set configured by one secondary node (secondary cell group) and determines reference configuration information based on the second common parameter set, where the second common parameter set includes SCG configuration information previously applied by the terminal and / or a parameter set configured by a pre-configured template secondary cell group.

[0179] By receiving one or more SCG configurations and determining first reference configuration information based on the one or more SCG configurations, the master node determines the first reference configuration information required by the master node based on the obtained SCG configurations, thereby expanding the scope of application.

[0180] Specifically, the master node obtains the first reference setting information, which includes the following:

[0181] S103c: The master node receives first reference configuration information from a source secondary node, where the source secondary node is a secondary node corresponding to a primary secondary cell currently accessed by the terminal.

[0182] For example, the source secondary node provides the reference configuration to the master node. Specifically, the master node requests the source secondary node to provide the reference configuration, and the source secondary node provides the first reference configuration information to the master node.

[0183] Specifically, the master node obtains the first reference setting information, which includes the following:

[0184] S103d: The master node receives an SCG configuration from a source secondary node, where the source secondary node is a secondary node corresponding to a primary secondary cell currently accessed by the terminal, and the SCG configuration of the source secondary node is an SCG full configuration configured by the source secondary node for the terminal.

[0185] The master node determines the first reference configuration information based on the SCG configuration from the source secondary node.

[0186] For example, the master node uses the SCG configuration provided by the source secondary node as the reference configuration. Specifically, the master node requests the source secondary node to provide the current SCG configuration of the terminal, the source secondary node provides the current SCG configuration to the master node, and the master node uses the current SCG configuration as the reference configuration.

[0187] S104: The master node obtains RRC messages corresponding to N candidate primary secondary cells, where N is a positive integer, the N candidate primary secondary cells are included in the M candidate primary secondary cells, the RRC message of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information, and the first candidate primary secondary cell is one of the N candidate primary secondary cells.

[0188] For example, the RRC message may include SCG configuration information corresponding to the primary secondary cell and may further include corresponding MCG configuration information. The RRC message type corresponding to the candidate primary secondary cell is delta configuration, where N is a positive integer, N candidate primary secondary cells are included in M ​​candidate primary secondary cells, the RRC message for a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information for the first candidate primary secondary cell, the SCG configuration information for the first candidate primary secondary cell is delta configuration based on the first reference configuration information, and the first candidate primary secondary cell is one of the N candidate primary secondary cells.

[0189] Specifically, the master node obtaining RRC messages corresponding to the N candidate primary and secondary cells includes:

[0190] S104a1: If the first message of S102a includes a secondary node addition request message, the master node indicates the secondary node addition request information and the first reference configuration information to another candidate secondary node other than the first candidate secondary node, and receives an RRC message for the candidate primary secondary cell from the other candidate secondary node.

[0191] S104a2: If the first message of S102a does not include a secondary node addition request message, the master node indicates the secondary node addition request information and the first reference configuration information to all L candidate secondary nodes and receives RRC messages from the N candidate primary-secondary cells.

[0192] S104b: If the first reference configuration information is obtained in S102b, the master node indicates the secondary node addition request information and the first reference configuration information to all candidate secondary nodes or to another candidate secondary node other than the first candidate secondary node, and receives an RRC message for the candidate primary secondary cell from the other secondary node.

[0193] S104c: The master node indicates the secondary node addition request information and the first reference configuration information to all L candidate secondary nodes, and receives an RRC message from the N candidate primary-secondary cells.

[0194] S104d: The master node indicates the secondary node addition request information and the first reference configuration information to all L candidate secondary nodes, and receives RRC messages from the N candidate primary secondary cells. The secondary node addition request information and the first reference configuration information indicate to the candidate secondary nodes to prepare candidate primary secondary cells and RRC messages corresponding to the candidate primary secondary cells based on the first reference configuration information, and indicates the RRC messages to the master node.

[0195] S105: The master node delivers, to the terminal, second reference configuration information and an RRC message corresponding to the N candidate primary / secondary cells. The second reference configuration information includes the first reference configuration information. The second reference configuration information and the RRC message of the first candidate primary / secondary cell are used to determine third configuration information, and the third configuration information is used by the terminal to access the first candidate primary / secondary cell.

[0196] For example, the RRC message corresponding to the candidate primary / secondary cells may further include corresponding MCG air interface configuration information, which is a delta configuration, and the delta configuration corresponds to the reference information. The terminal needs to first apply the second reference configuration information and then apply the RRC message of the delta configuration corresponding to the candidate primary / secondary cells. Therefore, the second reference configuration information configured by the master node for the terminal includes the first reference configuration information (SCG configuration) and the MCG configuration, and may further include one or more of an execution trigger condition and a measurement configuration corresponding to the N candidate primary / secondary cells. The second reference configuration information may be an information element or an RRC reconfiguration message.

[0197] For example, the second reference configuration information may alternatively be a separate RRC reconfiguration message. The master node delivers an RRC reconfiguration message for successive CPC configurations to the terminal, and the RRC reconfiguration message may include RRC messages corresponding to the N candidate primary and secondary cells, and may further include one or more of an execution trigger condition, a measurement configuration, and the second reference configuration information for the N candidate primary and secondary cells.

[0198] For example, the terminal may be in a single connection (no primary / secondary cell configured) or in a dual connection (MR-DC configured). The candidate secondary node addition message contains information about the recommended candidate primary / secondary cells and measurement results.

[0199] In the successive CPAC procedures triggered by the master node, the master node obtains reference information and provides RRC messages to at least one candidate secondary node to support delta configuration of candidate primary-secondary cells, which reduces the RRC signaling transmission and storage overhead compared to full configuration, reduces user plane data interruption time, and avoids data packet loss.

[0200] The terminal may be in single connectivity (no primary or secondary cell configured) or in dual connectivity (MR-DC configured).

[0201] In this embodiment, M candidate primary and secondary cells are determined to determine possible primary and secondary cells that can be accessed by the terminal. Second reference configuration information and RRC messages corresponding to the N candidate primary and secondary cells are delivered to the terminal, so that the terminal accesses the first candidate primary and secondary cell based on the RRC message of the delta configuration of the first candidate primary and secondary cell. Therefore, during the process of continuous CPAC, the overhead of RRC signaling transmission and terminal storage is reduced using the delta configuration method.

[0202] In addition, the terminal only needs to perform PDCP re-establishment or recovery based on the first reference configuration information of the candidate secondary node and the RRC message of the delta configuration of the first candidate primary-secondary cell to resume data transmission.

[0203] Therefore, compared to the current method in which a full configuration of RRC messages for the first candidate cell needs to be performed when the terminal is handed over from the current primary / secondary cell to the first candidate cell, and therefore PDCP release and re-addition needs to be performed, this step reduces RRC signaling and storage overhead, reduces user plane data interruption time, and avoids data packet loss.

[0204] S106: The terminal determines third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and the terminal accesses the first candidate primary / secondary cell based on the third configuration information.

[0205] In this step, the third configuration information includes SCG configuration information of candidate primary / secondary cells, the third configuration information further includes measurement configurations and / or handover trigger conditions corresponding to at least one candidate primary / secondary cell of the first candidate primary / secondary cell, and the third configuration information further includes MCG configuration information of the candidate primary / secondary cells.

[0206] For example, the terminal determining third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and the terminal accessing the first candidate primary / secondary cell based on the third configuration information includes:

[0207] When the terminal determines that the first candidate primary / secondary cell satisfies the corresponding execution trigger condition, the terminal accesses the first candidate primary / secondary cell based on the first reference configuration information and the RRC message of the first candidate primary / secondary cell.

[0208] In an exemplary embodiment, the terminal continues to determine whether the candidate primary secondary cells satisfy the execution trigger condition. When the terminal detects that one candidate primary secondary cell (candidate primary secondary cell #1) satisfies the corresponding execution trigger condition, the terminal applies an RRC message corresponding to the candidate primary secondary cell (candidate primary secondary cell #1) and feeds back a reconfiguration completion to the MN, indicating information about the candidate primary secondary cell (candidate primary secondary cell #1).

[0209] The terminal performs random access to a candidate primary secondary cell (candidate primary secondary cell #1).

[0210] The RRC message corresponding to the candidate primary / secondary cell may further include corresponding MCG air interface configuration information, which is a delta configuration, and the delta configuration corresponds to the reference information. The terminal must first apply the second reference configuration information, and then apply the RRC message of the delta configuration corresponding to the candidate primary / secondary cell. Therefore, the second reference configuration information configured by the master node for the terminal is the first reference configuration information (SCG configuration) and the MCG configuration and The second reference configuration information may further include one or more of an execution trigger condition and a measurement configuration corresponding to the N candidate primary and secondary cells. The second reference configuration information may be an information element or an RRC message, but is not limited thereto.

[0211] The sequence in which the terminal transmits the RRC reconfiguration complete message and performs random access is not limited and is determined based on the implementation mode of the terminal.

[0212] After the UE successfully changes to candidate primary secondary cell #1, the UE continues to determine whether the candidate primary secondary cell satisfies the execution trigger condition. When the UE detects that one candidate primary secondary cell (candidate primary secondary cell #2) satisfies the corresponding execution trigger condition, the UE applies an RRC message corresponding to the candidate primary secondary cell (candidate primary secondary cell #2) and feeds back a reconfiguration completion to the MN, indicating information about the candidate primary secondary cell (candidate primary secondary cell #2).

[0213] The terminal performs random access to a candidate primary secondary cell (candidate primary secondary cell #2).

[0214] After the terminal has successfully accessed the candidate primary / secondary cell, the terminal continues to determine whether the candidate primary / secondary cell satisfies the execution trigger condition until the network side indicates to the terminal to release the continuous CPAC configuration.

[0215] In this step, the terminal may determine third configuration information used to access the first candidate primary / secondary cell based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and obtain the third configuration information based on the delta configuration. Thus, during the continuous CPAC process, RRC signaling transmission and terminal storage overhead are reduced using the delta configuration method.

[0216] In addition, the terminal only needs to determine the third configuration information based on the first reference configuration information of the candidate secondary node and the RRC message of the delta configuration of the first candidate primary-secondary cell, and the terminal only needs to perform PDCP re-establishment or recovery to continue data transmission.

[0217] Therefore, compared to the current method in which full configuration needs to be performed when the terminal is handed over from the current primary / secondary cell to the first candidate cell, and therefore PDCP release and re-addition needs to be performed, this step reduces RRC signaling and storage overhead, reduces user plane data interruption time, and avoids data packet loss.

[0218] 8 is a signaling diagram of a cell configuration method according to an embodiment of this application. As shown in FIG. 8, the method includes the following steps:

[0219] S201: The master node separately sends secondary node addition request information to L candidate secondary nodes, and K candidate secondary nodes are included in the L candidate secondary nodes.

[0220] For example, the master node may transmit a conditional candidate secondary node addition request message to the L candidate secondary nodes to request the L candidate secondary nodes to allocate radio resources to the terminal. The secondary node addition request message may indicate recommended candidate primary and secondary cells.

[0221] Optionally, separately transmitting the secondary node addition request information to the L candidate secondary nodes includes responding to a secondary node change message received from the source secondary node.

[0222] For example, when a source secondary node triggers a continuous CPAC (CPC) procedure, a secondary node change request message is sent to the master node, and the secondary node change request message indicates information about the recommended candidate primary and secondary cells and the corresponding execution trigger conditions.

[0223] S202: The master node receives K pieces of first reference configuration information and N RRC messages from K candidate secondary nodes, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more RRC messages, the RRC message of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node, and the first reference configuration information includes an SCG configuration.

[0224] For example, the K first reference configuration information is the first reference configuration information of each candidate secondary node among the K candidate secondary nodes. In other words, each candidate secondary node has corresponding first reference configuration information.

[0225] The master node sends a conditional candidate secondary node addition request message to the candidate secondary node to request the candidate secondary node to allocate radio resources to the terminal. The addition request message may include information about recommended candidate primary and secondary cells.

[0226] The candidate secondary node determines first reference configuration information and feeds back to the master node the prepared candidate primary / secondary cells, the first reference configuration information, and an RRC message corresponding to each candidate primary / secondary cell. The RRC message includes SCG air interface configuration information corresponding to the candidate primary / secondary cell and may further include MCG air interface configuration information. The type of the RRC message corresponding to the candidate primary / secondary cell is a delta configuration generated based on the reference configuration determined by the candidate secondary node.

[0227] S203: The master node distributes second reference configuration information and RRC information of the N candidate primary and secondary cells to the terminal, where the second reference configuration information includes the K first reference configuration information.

[0228] For example, third configuration information is determined based on first reference configuration information of a first candidate secondary node in the second reference configuration information and an RRC message of the first candidate primary secondary cell, and the third configuration information is used by a terminal to access the first candidate primary secondary cell. The RRC message of the first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell. The SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

[0229] The terminal corresponds to the N candidate primary and secondary cells, and further receives execution trigger conditions and measurement configuration information from the master node.

[0230] For example, the second reference configuration information may alternatively be a separate RRC reconfiguration message. The RRC reconfiguration message for successive CPC configurations delivered by the master node to the terminal may include RRC messages corresponding to the N candidate primary and secondary cells, may further include one or more of execution trigger conditions, measurement configurations, and second reference configuration information for the N candidate primary and secondary cells, and may further include indication information of correspondence between the RRC messages of the N candidate primary and secondary cells and the K pieces of first reference information.

[0231] The master node distributes first indication information to the terminal, and the first indication information indicates correspondence between the K pieces of first reference configuration information and RRC messages of the N candidate primary and secondary cells or the N candidate primary and secondary cells.

[0232] Candidate primary secondary cell #3 and candidate primary secondary cell #4 are cells of candidate secondary node #2, and candidate secondary node #2 prepares RRC messages for candidate primary secondary cell #3 and candidate primary secondary cell #4 based on reference configuration #2 of candidate secondary node #2. In this case, the master node indicates to the terminal the relationship between the candidate primary secondary cells and the reference configurations, or the relationship between the RRC messages of the candidate primary secondary cells and the reference configurations, so that the terminal can find the first reference configuration information for the RRC messages of the candidate primary secondary cells.

[0233] The second reference configuration information includes K first reference configuration information (first reference configuration #1, first reference configuration #2, ...) and MCG configuration information, and may further include one or more of execution trigger conditions and measurement configuration information corresponding to N candidate primary and secondary cells.

[0234] In the continuous CPAC procedure, the procedure may be triggered by either the master node or the source secondary node. The candidate secondary node prepares RRC messages for the candidate primary and secondary cells in delta configuration format based on their respective reference configurations to reduce RRC signaling, reduce user plane data interruption time, and avoid data packet loss. When performing a primary and secondary cell change, the terminal determines whether to perform an intra-station candidate primary and secondary cell change or an inter-station candidate primary and secondary cell change based on whether the reference configuration corresponding to the candidate primary and secondary cell changes. The terminal then performs PDCP operations based on the intra-station candidate primary and secondary cell change or the inter-station candidate primary and secondary cell change to further reduce user plane interruption time and improve the user experience.

[0235] In the case of successive CPAC procedures, when multiple reference configurations are used, the procedure may be triggered by the master node or by the source secondary node. The method by which candidate secondary nodes support delta configurations based on their respective reference configurations is specified, and the method by which terminals apply the delta configurations is specified.

[0236] In Rel-17 CPAC, primary / secondary cell addition / change only needs to be performed once, so after the primary / secondary cell addition / change is complete, the UE releases the candidate cell configuration used for conditional addition. In Rel-18 (the first version of the 5G-Advanced Rel-18 standard), to support continuous primary / secondary cell addition / change, after the initial primary / secondary cell addition (from no primary / secondary cell to primary / secondary cell #1) is performed based on the full configuration, the full configuration is then used for subsequent primary / secondary cell changes (such as, but not limited to, from primary / secondary cell #1 to primary / secondary cell #2 and from primary / secondary cell #n to primary / secondary cell #m). As a result, when the UE performs a conditional primary / secondary cell addition / change by applying the full configuration, it must perform Packet Data Convergence Layer Protocol (PDCP) release and re-addition. This results in long user plane data interruptions and data packet loss issues. The data packet loss problem usually occurs when the scheduling interval is greater than the PDCP timer and the timer expires, after which the base station actively discards packets.

[0237] In this embodiment, K pieces of first reference configuration information and N pieces of RRC messages are received from K candidate secondary nodes to obtain the first reference configuration information of each candidate secondary node and the RRC messages of the N primary secondary cells.

[0238] The second reference configuration information and RRC messages corresponding to the N candidate primary and secondary cells are delivered to the terminal, and as a result, when the terminal decides to perform handover between two candidate primary and secondary cells of the same candidate secondary node, the terminal performs PDCP recovery and continues data transmission.

[0239] When the terminal decides to perform a handover between two candidate primary-secondary cells of different candidate secondary nodes, the terminal performs PDCP re-establishment and continues data transmission.

[0240] Therefore, compared to the current method in which full configuration needs to be performed when the terminal is handed over from the current primary / secondary cell to the first candidate cell, and therefore PDCP release and re-addition need to be performed, in this embodiment, only PDCP recovery or re-establishment needs to be performed, reducing RRC signaling and storage overhead, reducing user plane data interruption time, and avoiding data packet loss.

[0241] S204: The terminal determines third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and the terminal accesses the first candidate primary / secondary cell based on the third configuration information.

[0242] In this step, the third configuration information includes SCG configuration information of the first candidate primary / secondary cell, and the third configuration information may further include an MCG configuration of the first candidate primary / secondary cell, and may further include one or more of execution trigger conditions and measurement configurations of at least one candidate primary / secondary cell of the first candidate primary / secondary cell.

[0243] The terminal receives first indication information from the master node, and the first indication information indicates correspondence between the K pieces of first reference configuration information and RRC messages of the N candidate primary and secondary cells, or correspondence between the K pieces of first reference configuration information and the N candidate primary and secondary cells.

[0244] The terminal determining the third configuration information based on the second reference configuration information and the RRC message of the first candidate primary secondary cell includes:

[0245] When the terminal determines that the first candidate primary / secondary cell satisfies the corresponding execution trigger condition, the terminal determines third configuration information based on the first reference configuration information that is in the second reference configuration message and corresponds to the first candidate primary / secondary cell and the RRC message of the first candidate primary / secondary cell.

[0246] Determining third configuration information by the terminal based on first reference configuration information that is in the second reference configuration message and corresponds to the first candidate primary secondary cell and the RRC message of the first candidate primary secondary cell includes:

[0247] If the terminal determines that the first reference configuration information corresponding to the first candidate primary / secondary cell is the same as the first reference configuration information applied by the terminal, the terminal determines that an intra-station primary / secondary cell change is performed; or If the terminal determines that the first reference setting information corresponding to the first candidate primary / secondary cell is different from the first reference setting information applied by the terminal, the terminal determines that an inter-station primary / secondary cell change is to be performed.

[0248] If the terminal determines that the first reference configuration information corresponding to the first candidate primary / secondary cell is the same as the first reference configuration information applied by the terminal, the terminal determines that an intra-station primary / secondary cell change is to be performed, performs PDCP recovery, and continues data transmission.

[0249] If the terminal determines that the first reference configuration information corresponding to the first candidate primary / secondary cell is different from the first reference configuration information applied by the terminal, the terminal determines that an inter-station primary / secondary cell change is to be performed, performs PDCP re-establishment, and continues data transmission.

[0250] In an exemplary embodiment, the terminal continues to determine whether the candidate primary and secondary cells satisfy an execution trigger condition.

[0251] When the terminal detects that one candidate primary secondary cell (candidate primary secondary cell #1) satisfies the corresponding execution trigger condition, the terminal first applies the first reference configuration information corresponding to the candidate primary secondary cell, then applies an RRC message corresponding to the candidate primary secondary cell (candidate primary secondary cell #1), and feeds back a reconfiguration completion to the MN, indicating information about the candidate primary secondary cell (candidate primary secondary cell #1).

[0252] The RRC reconfiguration corresponding to the candidate primary / secondary cell may be a delta configuration, and the delta configuration corresponds to a reference configuration of the candidate primary / secondary cell. In the second reference configuration information delivered to the terminal, the terminal finds the first reference configuration information based on the relationship between the RRC message of the candidate primary / secondary cell and the first reference configuration information, which is the relationship indicated in step 4. Optionally, the terminal first applies the MCG configuration in the second reference configuration information, then applies the first reference configuration information, and then applies the RRC message of the delta configuration corresponding to the candidate primary / secondary cell.

[0253] The terminal performs random access to a candidate primary secondary cell (candidate primary secondary cell #1).

[0254] The sequence in which the terminal transmits the RRC reconfiguration complete message and performs random access is not limited and is determined based on the implementation mode of the terminal.

[0255] After the terminal has successfully accessed candidate primary / secondary cell #1, the terminal continues to determine whether the candidate primary / secondary cell satisfies the execution trigger condition.

[0256] When the terminal detects that one candidate primary secondary cell (candidate primary secondary cell #2) satisfies the corresponding execution trigger condition, the terminal first applies the first reference configuration information corresponding to the candidate primary secondary cell, and then the terminal applies an RRC message corresponding to the candidate primary secondary cell (candidate primary secondary cell #2) and feeds back a reconfiguration completion to the MN, indicating information about the candidate primary secondary cell (candidate primary secondary cell #2).

[0257] The terminal determines that candidate primary / secondary cell #2 corresponds to the first reference configuration information and determines whether the first reference configuration information corresponding to candidate primary / secondary cell #2 is the same as the currently applied first reference configuration information. If the first reference configuration information corresponding to candidate primary / secondary cell #2 is the same as the currently applied first reference configuration information, the first reference configuration information corresponding to candidate primary / secondary cell #2 and the currently applied first reference configuration information have the same SN. In other words, an intra-station candidate primary / secondary cell change is performed, and the terminal only needs to perform PDCP data recovery. Otherwise, an inter-station candidate primary / secondary cell change is performed, and the terminal performs PDCP re-establishment. If the terminal cannot distinguish between an intra-station candidate primary / secondary cell change and an inter-station candidate primary / secondary cell change, the terminal performs PDCP re-establishment. If the terminal candidate Primary / Secondary Cell Change and Inter-station candidate If primary and secondary cell changes can be distinguished, the disruption time of user plane data is reduced.

[0258] The terminal performs random access to a candidate primary secondary cell (candidate primary secondary cell #2).

[0259] If the network sends an SN release instruction to the terminal after the terminal has successfully accessed candidate primary / secondary cell #1, the terminal enters single connection state. In this case, the terminal's random access to candidate primary / secondary cell #2 is considered a candidate primary / secondary cell addition. Otherwise, the terminal's random access to candidate primary / secondary cell #2 is considered a candidate primary / secondary cell change.

[0260] After the terminal has successfully accessed the candidate primary / secondary cell, the terminal continues to determine whether the candidate primary / secondary cell satisfies the execution trigger condition until the network side indicates to the terminal to release the continuous CPAC configuration.

[0261] In this step, when the terminal decides to perform a handover between two candidate primary-secondary cells of the same candidate secondary node, the terminal performs PDCP recovery and continues data transmission.

[0262] When the terminal decides to perform a handover between two candidate primary-secondary cells of different candidate secondary nodes, the terminal performs PDCP re-establishment and continues data transmission.

[0263] Therefore, compared with the current method in which full configuration needs to be performed when the terminal is handed over from the current primary / secondary cell to the first candidate cell, and therefore PDCP release and re-addition need to be performed, in this embodiment, only PDCP recovery or PDCP re-establishment needs to be performed, reducing RRC signaling and storage overhead, reducing the interruption time of user plane data, and avoiding data packet loss.

[0264] 9 is a diagram of the structure of a master node according to one embodiment of this application. As shown in FIG. 9, the master node includes a first receiver 91 and a first transmitter 92.

[0265] The first receiver 91 is configured to determine M candidate primary and secondary cells, where M is a positive integer.

[0266] The first receiver 91 is further configured to obtain first reference setting information.

[0267] The first receiver 91 is further configured to obtain RRC messages corresponding to N candidate primary secondary cells, where N is a positive integer, the N candidate primary secondary cells are included in the M candidate primary secondary cells, the RRC message of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information.

[0268] The first transmitter 92 is configured to deliver, to the terminal, second reference configuration information and an RRC message corresponding to the N candidate primary and secondary cells, where the second reference configuration information includes the first reference configuration information.

[0269] The first receiver 91 is further configured to receive first reference configuration information from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary-secondary cells.

[0270] The first receiver 91 is further configured to receive first reference configuration information from the first candidate secondary node in response to a first message sent to the first candidate secondary node, the first message being used to request the first reference configuration information.

[0271] The first receiver 91 is further configured to receive one or more SCG configurations from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary-secondary cells, the one or more SCG configurations being full configurations, and M being a positive integer.

[0272] The first receiver 91 is further configured to determine first reference setting information based on one or more SCG settings.

[0273] The first receiver 91 is further configured to receive one or more SCG configurations from the first candidate secondary node in response to a secondary node addition request message sent to the first candidate secondary node, the secondary node addition request message being used to request one or more SCG configurations.

[0274] The first receiver 91 is further configured to receive first reference setting information from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently being accessed by the terminal.

[0275] The first receiver 91 is further configured to receive first reference setting information from the source secondary node in response to a second message sent to the source secondary node, the second message being used to request the first reference setting information.

[0276] The first receiver 91 is further configured to receive an SCG configuration from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently being accessed by the terminal, and the SCG configuration of the source secondary node being a full configuration.

[0277] The first receiver 91 is further configured to determine first reference configuration information based on the SCG configuration from the source secondary node.

[0278] The first receiver 91 is further configured to receive an SCG configuration from the source secondary node in response to a third message sent to the source secondary node, the third message being used to request the current SCG configuration of the terminal.

[0279] 10 is a diagram of the structure of a master node according to one embodiment of this application. As shown in FIG. 10, the master node includes a second receiver 101 and a second transmitter 102.

[0280] The second receiver 101 is configured to receive K first reference configuration information and N RRC messages from K candidate secondary nodes, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one first reference configuration information and one or more RRC messages, the RRC message of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of a first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

[0281] The second transmitter 102 is configured to deliver second reference configuration information and RRC messages of the N candidate primary and secondary cells to the terminal, where the second reference configuration information includes the K first reference configuration information.

[0282] The second receiver 101 is further configured to receive K pieces of first reference configuration information and N RRC messages from the K candidate secondary nodes in response to secondary node addition request information separately transmitted to the L candidate secondary nodes, where the K candidate secondary nodes are included in the L candidate secondary nodes.

[0283] 11 is a diagram of the structure of a terminal according to an embodiment of this application. As shown in FIG. 11, the terminal includes: a third receiver 111 and a third transmitter 112.

[0284] The third receiver 111 is configured to receive second reference configuration information from the master node and RRC messages corresponding to N candidate primary / secondary cells, where N is a positive integer, the RRC message of a first candidate primary / secondary cell among the N candidate primary / secondary cells includes SCG configuration information of the first candidate primary / secondary cell, the SCG configuration information of the first candidate primary / secondary cell is a delta configuration based on the first reference configuration information, and the second reference configuration information includes the first reference configuration information.

[0285] The third transmitter 112 determines third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell. death , terminal to 3. Access the first candidate primary-secondary cell based on the configuration information. It is configured to .

[0286] The third transmitter 112, when it is determined that the first candidate primary / secondary cell satisfies the corresponding execution trigger condition, On your device, The mobile station is further configured to access the first candidate primary / secondary cell based on the first reference configuration information and an RRC message of the first candidate primary / secondary cell.

[0287] 12 is a diagram of the structure of a terminal according to an embodiment of this application. As shown in FIG. 12, the terminal includes: a fourth receiver 121 and a fourth transmitter 122.

[0288] The fourth receiver 121 is configured to receive second reference configuration information from the master node and RRC messages of N candidate primary secondary cells, where the second reference configuration information includes K first reference configuration information, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one first reference configuration information and one or more RRC messages, the RRC message of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

[0289] The fourth transmitter 122 is configured to determine third configuration information based on the second reference configuration information and the RRC message of the first candidate primary / secondary cell, and the fourth transmitter 122 is further configured to access the first candidate primary / secondary cell based on the third configuration information.

[0290] The fourth transmitter 122 is further configured to determine third configuration information based on first reference configuration information that is in the second reference configuration message and corresponds to the first candidate primary secondary cell and the RRC message of the first candidate primary secondary cell when it is determined that the first candidate primary secondary cell satisfies a corresponding execution trigger condition.

[0291] The fourth transmitter 122 is further configured to determine that an intra-station primary / secondary cell change is to be performed when it is determined that the first reference configuration information corresponding to the first candidate primary / secondary cell is the same as the first reference configuration information applied by the terminal.

[0292] The fourth transmitter 122 is further configured to determine that an inter-station primary-secondary cell change is to be performed when it is determined that the first reference configuration information corresponding to the first candidate primary-secondary cell is different from the first reference configuration information applied by the terminal.

[0293] 13 is a diagram of the structure of a secondary node according to one embodiment of the present application. As shown in FIG. 13, the secondary node: A fifth transmitter 131 is included.

[0294] The fifth receiver 131 is configured to transmit K pieces of first reference configuration information and N RRC messages to the master node, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more RRC messages, the RRC message of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

[0295] The fifth transmitter 131 is further configured to respond to secondary node additional information received from the master node.

[0296] Figure 14 is a diagram of the structure of a master node according to one embodiment of the present application. As shown in Figure 14, the master node may be configured to perform the actions or steps of the terminal devices in the embodiments shown in Figures 7A-7D and 9. The master node includes a first receiver 91, a first transmitter 92, a communication interface 93, a memory 94, and a processor 95.

[0297] The processor 95 invokes programs to implement the units and modules shown in FIG. 9 and perform the operations in the aforementioned method embodiments. The processor 95 may be a controller and is designated "controller / processor 95" in FIG. 14. The first transmitter 92 and first receiver 91 are configured to assist the master node in transmitting and receiving information to and from terminals, secondary nodes, and core network devices in the aforementioned embodiments, and to assist the master node in performing wireless communications between terminals, secondary nodes, and core network devices in the aforementioned embodiments. The processor 95 performs various functions used to communicate with terminals, secondary nodes, and core network devices.

[0298] Additionally, the master node may further include a memory 94 configured to store program code and data for the master node. Additionally, the master node may further include a communication interface 93 configured to assist the master node in communicating with other network entities and terminal devices.

[0299] The processor 95, e.g., a central processing unit (CPU), may be one or more integrated circuits configured to implement the methods described above, e.g., one or more specific integrated circuits, one or more microprocessors, or one or more field programmable gate arrays. The memory 94 may be a memory or may refer collectively to multiple storage elements.

[0300] Figure 15 is a diagram of the structure of a master node according to one embodiment of this application. As shown in Figure 15, the master node may be configured to perform the actions or steps of the terminal devices in the embodiments shown in Figures 8 and 10. The master node includes a first receiver 101, a first transmitter 102, a communication interface 103, a memory 104, and a processor 105.

[0301] The processor 105 invokes programs to implement the units and modules shown in FIG. 10 and perform the operations in the aforementioned method embodiments. The processor 105 may be a controller and is designated "controller / processor 105" in FIG. 14. The first transmitter 102 and the first receiver 101 are configured to assist the master node in transmitting and receiving information to and from terminals, secondary nodes, and core network devices in the aforementioned embodiments, and to assist the master node in performing wireless communications between terminals, secondary nodes, and core network devices in the aforementioned embodiments. The processor 105 performs various functions used to communicate with terminals, secondary nodes, and core network devices.

[0302] Furthermore, the master node may further include a memory 104 configured to store program codes and data for the master node. Additionally, the master node may further include a communication interface 103 configured to assist the master node in communicating with other network entities and terminal devices.

[0303] The processor 105, e.g., a central processing unit (CPU), may be one or more integrated circuits configured to implement the methods described above, e.g., one or more specialized integrated circuits, one or more microprocessors, or one or more field programmable gate arrays. The memory 104 may be a memory or may be multiple storage elements.

[0304] Figure 16 is a diagram of the structure of a terminal according to one embodiment of this application. As shown in Figure 16, the terminal may be configured to perform the actions or steps of the terminal device in the embodiments shown in Figures 7A to 7D and 9. The terminal includes a first receiver 111, a first transmitter 112, a communication interface 113, a memory 114, and a processor 115.

[0305] The processor 115 invokes programs to implement the units and modules shown in FIG. 9 and perform the operations in the aforementioned method embodiments. The processor 115 may be a controller and is designated "controller / processor 115" in FIG. 16. The first transmitter 112 and the first receiver 111 are configured to assist the terminal in transmitting and receiving information to and from the master node, secondary node, and core network device in the aforementioned embodiments, and to assist the terminal in performing wireless communication with the master node, secondary node, and core network device in the aforementioned embodiments. The processor 115 performs various functions used to communicate with the master node, secondary node, and core network device.

[0306] Furthermore, the terminal may further include memory 114, which is configured to store program codes and data for the terminal. Additionally, the terminal may further include a communication interface 113, which is configured to assist the terminal in communicating with other network entities and terminal devices.

[0307] The processor 115, e.g., a central processing unit (CPU), may be one or more integrated circuits configured to implement the methods described above, e.g., one or more specialized integrated circuits, one or more microprocessors, or one or more field programmable gate arrays. The memory 114 may be a memory or may be multiple storage elements.

[0308] Figure 17 is a diagram of the structure of a terminal according to one embodiment of this application. As shown in Figure 17, the terminal may be configured to perform the actions or steps of the terminal device in the embodiments shown in Figures 8 and 10. The terminal includes a first receiver 121, a first transmitter 122, a communication interface 123, a memory 124, and a processor 125.

[0309] The processor 125 invokes programs to implement the units and modules shown in Figure 10 and perform the operations in the above-described method embodiments. The processor 125 may be a controller, and is designated as "controller / processor 125" in Figure 14. The first transmitter 122 and the first receiver 121 in the above-described embodiments: Masternode The processor 125 is configured to assist the terminal in transmitting and receiving information to and from the master node, the secondary node, and the core network device, and in the aforementioned embodiment, to assist the terminal in performing wireless communication between the master node, the secondary node, and the core network device. The processor 125 performs various functions used in communicating with the master node, the secondary node, and the core network device.

[0310] Furthermore, the terminal may further include a memory 124 configured to store program codes and data for the terminal. Additionally, the terminal may further include a communication interface 123 configured to assist the terminal in communicating with other network entities and terminal devices.

[0311] The processor 125, e.g., a central processing unit (CPU), may be one or more integrated circuits configured to implement the methods described above, e.g., one or more specific integrated circuits, one or more microprocessors, or one or more field programmable gate arrays. The memory 124 may be a memory or may refer collectively to multiple storage elements.

[0312] Figure 18 is a diagram of a secondary node structure according to one embodiment of the present application. As shown in Figure 18, the secondary node may be configured to perform the actions or steps of the secondary node device in the embodiments shown in Figures 8 and 10. The secondary node includes a first transmitter 131, a communication interface 132, a memory 133, and a processor 134.

[0313] The processor 134 invokes programs to implement the units and modules shown in FIG. 10 and performs the operations in the aforementioned method embodiments. The processor 134 may be a controller and is designated "controller / processor 134" in FIG. 14. The first transmitter 131 and the first receiver 121 are configured to assist the secondary node in transmitting and receiving information to and from the terminal, the master node, and the core network device in the aforementioned embodiment, and to assist the secondary node in performing wireless communication between the terminal, the master node, and the core network device in the aforementioned embodiment. The processor 134 performs various functions used to communicate with the terminal, the master node, and the core network device.

[0314] Additionally, the secondary node may further include memory 133, which is configured to store program code and data for the secondary node. Additionally, the secondary node may further include a communication interface 132, which is configured to assist the secondary node in communicating with other network entities and secondary node devices.

[0315] The processor 134, e.g., a central processing unit (CPU), may be one or more integrated circuits configured to implement the methods described above, e.g., one or more specialized integrated circuits, one or more microprocessors, or one or more field programmable gate arrays. The memory 133 may be a memory or may be multiple storage elements.

[0316] An embodiment of the present application provides a communication system, which includes the network device shown in FIG. 14 and the terminal shown in FIG.

[0317] One embodiment of the present application provides a communication system, including a master node as shown in Figure 15, a terminal as shown in Figure 17, and a secondary node as shown in Figure 18.

[0318] One embodiment of the present application provides a computer-readable storage medium containing instructions or a program, which, when executed on a computer, enables the computer to perform the steps of the master node, terminal, and secondary node in Figures 7A to 7D.

[0319] One embodiment of the present application provides a computer-readable storage medium containing instructions or a program, which, when executed on a computer, enables the computer to perform the steps of the master node, the terminal, and the secondary node in FIG.

[0320] One embodiment of the present application provides a computer program product including program code that, when executed by a computer, is configured to perform the steps of the network device in the embodiments shown in Figures 7A-7D and 8.

[0321] All or part of the above-described embodiments may be implemented via software, hardware, firmware, or any combination thereof. When software is used to implement the above-described embodiments, all or part of the embodiments may be implemented in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the procedures or functions according to the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or another programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio, or microwave) transmission. A computer-readable storage medium may be any available medium accessible by a computer, or a data storage device, such as a server or data center, that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disk drives, or magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid state drives or solid state disks (SSDs)).

[0322] Those skilled in the art will understand that the functionality described in this application, in one or more of the foregoing examples, may be implemented by hardware, software, firmware, or any combination thereof. When the functionality is implemented by software, the functionality may be stored on or transmitted as one or more instructions or code in a computer-readable medium. Computer-readable media includes computer storage media and communication media, and communication media includes any medium that enables transmission of a computer program from one place to another. Storage media may be any available medium accessible to a general-purpose or special-purpose computer.

[0323] The above description is merely a specific implementation of the present invention, but is not intended to limit the protection scope of the present invention. Any modifications or replacements that are easily understood by those skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. 1. A cell configuration method, comprising: determining, by the master node, M candidate primary-secondary cells, where M is a positive integer; obtaining, by the master node, first reference setting information; acquiring, by the master node, RRC information corresponding to N candidate primary secondary cells, where N is a positive integer, and the N candidate primary secondary cells are included in the M candidate primary secondary cells; the RRC information of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information; and delivering, by the master node, second reference configuration information and the RRC information corresponding to the N candidate primary secondary cells to a terminal, wherein the second reference configuration information includes the first reference configuration information.

2. The acquiring, by the master node, of the first reference setting information includes:

2. The method of claim 1, comprising receiving, by the master node, the first reference configuration information from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary secondary cells.

3. 3. The method of claim 2, wherein receiving, by the master node, the first reference configuration information from the first candidate secondary node comprises receiving, by the master node, the first reference configuration information from the first candidate secondary node in response to a first message sent to the first candidate secondary node, the first message being used to request the first reference configuration information.

4. The acquiring, by the master node, of the first reference setting information includes: receiving, by the master node, one or more SCG configurations from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary secondary cells, and the one or more SCG configurations being full configurations; and determining, by the master node, the first reference configuration information based on the one or more SCG configurations.

5. 5. The method of claim 4, wherein receiving, by the master node, the one or more SCG configurations from the first candidate secondary node comprises receiving, by the master node, the one or more SCG configurations from the first candidate secondary node in response to a Secondary Node Addition Request message sent to the first candidate secondary node, wherein the Secondary Node Addition Request message is used to request the one or more SCG configurations.

6. The acquiring, by the master node, of the first reference setting information includes:

2. The method of claim 1, comprising receiving, by the master node, the first reference configuration information from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently being accessed by the terminal.

7. 7. The method of claim 6, wherein receiving, by the master node, the first reference setting information from the source secondary node comprises receiving, by the master node, the first reference setting information from the source secondary node in response to a second message sent to the source secondary node, the second message being used to request the first reference setting information.

8. The acquiring, by the master node, of the first reference setting information includes: receiving, by the master node, an SCG configuration from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently accessed by the terminal, and the SCG configuration of the source secondary node being a full configuration; and determining, by the master node, the first reference configuration information based on the SCG configuration from the source secondary node.

9. 9. The method of claim 8, wherein receiving, by the master node, the SCG configuration from the source secondary node comprises receiving, by the master node, the SCG configuration from the source secondary node in response to a third message sent to the source secondary node, the third message being used to request a current SCG configuration for the terminal.

10. 10. The method according to claim 1, wherein the RRC information corresponding to the N candidate primary secondary cells is an RRC message corresponding to the N candidate primary secondary cells, and the RRC information of the first candidate primary secondary cell is an RRC message of the first candidate primary secondary cell.

11. 1. A cell configuration method, comprising: receiving, by a master node, K pieces of first reference configuration information and N pieces of RRC information from K candidate secondary nodes, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more pieces of RRC information, the RRC information of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node; and distributing, by the master node, second reference configuration information and RRC information of the N candidate primary secondary cells to a terminal, wherein the second reference configuration information includes the K first reference configuration information.

12. 12. The method of claim 11, comprising: distributing, by the master node, first indication information to the terminal; and the first indication information indicating correspondence between the K first reference configuration information and RRC information of the N candidate primary secondary cells or the N candidate primary secondary cells.

13. 12. The method of claim 11, wherein receiving, by the master node, the K pieces of first reference configuration information and the N pieces of RRC information from the K candidate secondary nodes comprises receiving, by the master node, the K pieces of first reference configuration information and the N pieces of RRC information from the K candidate secondary nodes in response to secondary node addition request information separately transmitted to L candidate secondary nodes, wherein the K candidate secondary nodes are included in the L candidate secondary nodes.

14. 14. The method according to claim 11, wherein the N pieces of RRC information are N RRC messages, and the RRC information of the first candidate secondary node is an RRC message of the first candidate base station.

15. 1. A cell configuration method, comprising: receiving, by a terminal, second reference configuration information from a master node and RRC information corresponding to N candidate primary secondary cells, where N is a positive integer, the RRC information of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on first reference configuration information, and the second reference configuration information includes the first reference configuration information; determining, by the terminal, third configuration information based on the second reference configuration information and the RRC information of the first candidate primary secondary cell, and accessing, by the terminal, the first candidate primary secondary cell based on the third configuration information.

16. determining, by the terminal, third configuration information based on the second reference configuration information and the RRC information of the first candidate primary secondary cell, and accessing, by the terminal, the first candidate primary secondary cell based on the third configuration information; 16. The method of claim 15, comprising: when the terminal determines that the first candidate primary secondary cell satisfies a corresponding execution trigger condition, accessing the first candidate primary secondary cell based on the first reference configuration information and the RRC information of the first candidate primary secondary cell.

17. 17. The method of claim 15 or 16, wherein the RRC information corresponding to the N candidate primary secondary cells is an RRC message corresponding to the N candidate primary secondary cells, and the RRC information of the first candidate primary secondary cell is an RRC message of the first candidate primary secondary cell.

18. 1. A cell configuration method, comprising: receiving, by a terminal, second reference configuration information from a master node and RRC information of N candidate primary secondary cells, wherein the second reference configuration information includes K first reference configuration information, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one first reference configuration information and one or more pieces of RRC information, the RRC information of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node; determining, by the terminal, third configuration information based on the second reference configuration information and the RRC information of the first candidate primary secondary cell, and accessing, by the terminal, the first candidate primary secondary cell based on the third configuration information.

19. 19. The method of claim 18, comprising receiving, by the terminal, first indication information from the master node, the first indication information indicating a correspondence between the K first reference configuration information and the RRC information of the N candidate primary secondary cells, or a correspondence between the K first reference configuration information and the N candidate primary secondary cells.

20. determining, by the terminal, the third configuration information based on first reference configuration information that is in the second reference configuration information and corresponds to the first candidate primary secondary cell and the RRC information of the first candidate primary secondary cell, and accessing, by the terminal, the first candidate primary secondary cell based on the third configuration information; 20. The method of claim 18 or 19, wherein, when the terminal determines that the first candidate primary secondary cell satisfies a corresponding execution trigger condition, the terminal determines the third configuration information based on the first reference configuration information that is in the second reference configuration message and corresponds to the first candidate primary secondary cell and the RRC information of the first candidate primary secondary cell.

21. accessing, by the terminal, the first reference configuration information that is in the second reference configuration message and corresponds to the first candidate primary secondary cell, If the terminal determines that the first reference configuration information corresponding to the first candidate primary secondary cell is the same as the first reference configuration information applied by the terminal, determining that an intra-station primary secondary cell change is to be performed by the terminal; or 21. The method of claim 20, comprising: determining, by the terminal, to perform an inter-station primary secondary cell change if the terminal determines that the first reference configuration information corresponding to the first candidate primary secondary cell is different from the first reference configuration information applied by the terminal.

22. 22. The method according to claim 18, wherein the RRC information corresponding to the N candidate primary secondary cells is an RRC message corresponding to the N candidate primary secondary cells, and the RRC information of the first candidate primary secondary cell is an RRC message of the first candidate primary secondary cell.

23. 1. A cell configuration method, comprising: a method comprising: transmitting, by K candidate secondary nodes, K pieces of first reference configuration information and N pieces of RRC information to a master node, wherein K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more pieces of RRC information, the RRC information of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

24. 24. The method of claim 23, wherein transmitting the K first reference configuration information and the N RRC information to the master node includes responding to secondary node addition information received from the master node.

25. 25. The method of claim 23 or 24, wherein the N pieces of RRC information are N RRC messages, and the RRC information of the first candidate secondary node is an RRC message of the first candidate base station.

26. A master node including a first receiver and a first transmitter, the first receiver is configured to determine M candidate primary secondary cells, where M is a positive integer; the first receiver is further configured to obtain first reference setting information; the first receiver is further configured to obtain RRC information corresponding to N candidate primary secondary cells, where N is a positive integer, the N candidate primary secondary cells being included in the M candidate primary secondary cells, the RRC information of a first candidate primary secondary cell among the N candidate primary secondary cells including SCG configuration information of the first candidate primary secondary cell, the SCG configuration information of the first candidate primary secondary cell being a delta configuration based on the first reference configuration information; The first transmitter is configured to deliver, to a terminal, second reference configuration information and the RRC information corresponding to the N candidate primary secondary cells, wherein the second reference configuration information includes the first reference configuration information.

27. 27. The master node of claim 26, wherein the first receiver is further configured to receive the first reference configuration information from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary secondary cells.

28. 28. The master node of claim 27, wherein the first receiver is further configured to receive the first reference configuration information from the first candidate secondary node in response to a first message sent to the first candidate secondary node, the first message being used to request the first reference configuration information.

29. the first receiver is further configured to receive one or more SCG configurations from a first candidate secondary node, the first candidate secondary node being configured to manage one or more of the M candidate primary secondary cells, and the one or more SCG configurations being full configurations; 27. The master node of claim 26, wherein the first receiver is further configured to determine the first reference configuration information based on the one or more SCG configurations.

30. 30. The master node of claim 29, wherein the first receiver is further configured to receive the one or more SCG configurations from the first candidate secondary node in response to a secondary node addition request message sent to the first candidate secondary node, the secondary node addition request message being used to request the one or more SCG configurations.

31. 27. The master node of claim 26, wherein the first receiver is further configured to receive the first reference configuration information from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently accessed by the terminal.

32. 32. The master node of claim 31 , wherein the first receiver is further configured to receive the first reference setting information from the source secondary node in response to a second message sent to the source secondary node, the second message being used to request the first reference setting information.

33. the first receiver is further configured to receive an SCG configuration from a source secondary node, the source secondary node being a secondary node corresponding to a primary secondary cell currently accessed by the terminal, and the SCG configuration of the source secondary node being a full configuration; 27. The master node of claim 26, wherein the first receiver is further configured to determine the first reference configuration information based on the SCG configuration from the source secondary node.

34. 34. The master node of claim 33, wherein the first receiver is further configured to receive an SCG configuration from a source secondary node in response to a third message sent to the source secondary node, the third message being used to request a current SCG configuration of the terminal.

35. A master node according to any one of claims 26 to 34, wherein the RRC information corresponding to the N candidate primary secondary cells is an RRC message corresponding to the N candidate primary secondary cells, and the RRC information of the first candidate primary secondary cell is an RRC message of the first candidate primary secondary cell.

36. a master node including a second receiver and a second transmitter, the second receiver is configured to receive K pieces of first reference configuration information and N pieces of RRC information from K candidate secondary nodes, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more pieces of RRC information, the RRC information of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node; The second transmitter is configured to deliver second reference configuration information and RRC information of the N candidate primary secondary cells to a terminal, and the second reference configuration information includes the K first reference configuration information.

37. 37. The master node of claim 36, wherein the second receiver is further configured to receive the K first reference configuration information and the N RRC information from the K candidate secondary nodes in response to secondary node addition request information transmitted separately to L candidate secondary nodes, wherein the K candidate secondary nodes are included in the L candidate secondary nodes.

38. 38. The master node of claim 36 or 37, wherein the N pieces of RRC information are N RRC messages, and the RRC information of the first candidate secondary node is an RRC message of the first candidate base station.

39. a terminal including a third receiver and a third transmitter, the third receiver is configured to receive second reference configuration information and RRC information corresponding to N candidate primary secondary cells from a master node, where N is a positive integer, the RRC information of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information, and the second reference configuration information includes the first reference configuration information; the third transmitter is configured to determine third configuration information based on the second reference configuration information and the RRC information of the first candidate primary secondary cell, and the terminal accesses the first candidate primary secondary cell based on the third configuration information.

40. 40. The terminal of claim 39, wherein the third transmitter is further configured to, when it is determined that the first candidate primary secondary cell satisfies a corresponding execution trigger condition, access the first candidate primary secondary cell based on the first reference configuration information and the RRC information of the first candidate primary secondary cell.

41. 41. The terminal of claim 39 or 40, wherein the RRC information corresponding to the N candidate primary secondary cells is an RRC message corresponding to the N candidate primary secondary cells, and the RRC information of the first candidate primary secondary cell is an RRC message of the first candidate primary secondary cell.

42. a terminal including a fourth receiver and a fourth transmitter, the fourth receiver is configured to receive second reference configuration information and RRC information of N candidate primary secondary cells from a master node, the second reference configuration information including K first reference configuration information, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one first reference configuration information and one or more pieces of RRC information, the RRC information of a first candidate primary secondary cell among the N candidate primary secondary cells includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node; the fourth transmitter is configured to determine third configuration information based on the second reference configuration information and the RRC information of the first candidate primary secondary cell, and the fourth transmitter is further configured to access the first candidate primary secondary cell based on the third configuration information.

43. 43. The terminal of claim 42, wherein the fourth transmitter is further configured to, when it is determined that the first candidate primary secondary cell satisfies a corresponding execution trigger condition, determine the third configuration information based on the first reference configuration information that is in the second reference configuration message and corresponds to the first candidate primary secondary cell and the RRC information of the first candidate primary secondary cell.

44. the fourth transmitter is further configured to determine that an intra-station primary / secondary cell change is to be performed when it is determined that the first reference configuration information corresponding to the first candidate primary / secondary cell is the same as the first reference configuration information applied by the terminal; and 44. The terminal of claim 43, wherein the fourth transmitter is further configured to determine that an inter-station primary secondary cell change is performed when it is determined that the first reference configuration information corresponding to the first candidate primary secondary cell is different from the first reference configuration information applied by the terminal.

45. The terminal according to any one of claims 42 to 44, wherein the RRC information corresponding to the N candidate primary secondary cells is an RRC message corresponding to the N candidate primary secondary cells, and the RRC information of the first candidate primary secondary cell is an RRC message of the first candidate primary secondary cell.

46. a secondary node including a fifth transmitter, the fifth transmitter is configured to transmit K pieces of first reference configuration information and N pieces of RRC information to the master node, where K is a positive integer and N is a positive integer, one candidate secondary node corresponds to one piece of first reference configuration information and one or more pieces of RRC information, the RRC information of a first candidate secondary node among the K candidate secondary nodes includes SCG configuration information of the first candidate primary secondary cell, and the SCG configuration information of the first candidate primary secondary cell is a delta configuration based on the first reference configuration information of the first candidate secondary node.

47. 47. The secondary node of claim 46, wherein the fifth transmitter is further configured to respond to secondary node additional information received from the master node.

48. 48. A secondary node according to claim 46 or 47, wherein the N pieces of RRC information are N RRC messages, and the RRC information of the first candidate secondary node is an RRC message of the first candidate base station.

49. 26. A computer readable storage medium configured to store program code, said program code enabling a computer to carry out the method of any one of claims 1 to 25.

50. A computer program product comprising program code, said program code enabling a computer to carry out the method according to any one of claims 1 to 25.

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