Communication method and communication device

Abstract

The invention provides a communication method, which is executed by a terminal device, and comprises the following steps: receiving N pieces of first configuration information sent by a first network device, each piece of first configuration information in the N pieces of first configuration information comprising configuration information of a main cell, an execution condition for switching to the main cell and a first identifier, the N pieces of first configuration information comprise M pieces of first configuration information associated with a main cell served by second network equipment, and the first identifier is used for identifying one piece of configuration information in the M pieces of first configuration information; and sending the first identifier of the configuration information selected by the terminal equipment to the second network equipment. Based on the above technical scheme, the second network device can identify the configuration information selected by the terminal device.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular, to a communication method and a communication device. Background Art

[0002] Conditional handover (CHO) can be understood as a process in which a terminal device switches from a source base station to a target base station when a handover execution condition is met.

[0003] At present, in the CHO process with a candidate (secondary cell group, SCG), the source masternode (MN) (or source base station) obtains configuration information sent by multiple candidate MNs (candidate base stations) and uniformly allocates configuration identifiers to each configuration information. Therefore, when the target MN receives the configuration identifier of the selected configuration information sent by the terminal device, it cannot identify the configuration information referred to by the configuration identifier. Specifically, the target MN cannot identify the configuration information of the primary cell (PCell) and / or the configuration information of the primary secondary cell (PSCell) included in the configuration information selected by the terminal device.

[0004] Based on this, the present application aims to provide a communication method that enables a target MN to identify configuration information selected by a terminal device. Summary of the invention

[0005] The present application provides a communication method, which enables a target MN to identify configuration information selected by a terminal device.

[0006] In a first aspect, a communication method is provided, which is executed by a terminal device. The terminal device here may refer to the terminal device itself, or to a processor, module, chip, or chip system that implements the method in the terminal device. The method includes: receiving N first configuration information sent by a first network device, each of the N first configuration information includes configuration information of a primary cell, an execution condition for switching to the primary cell, and a first identifier, the N first configuration information include M first configuration information associated with a primary cell served by a second network device, and the first identifier is used to identify one configuration information in the M first configuration information; and sending a first identifier of the configuration information selected by the terminal device to the second network device.

[0007] According to the technical solution of the present application, a terminal device receives N first configuration information sent by a first network device, wherein the first configuration information includes configuration information of a primary cell, execution conditions for switching to the primary cell, and a first identifier. Among them, the N first configuration information include M first configuration information associated with a primary cell served by a second network device, and the first identifier is used to identify one configuration information in the M first configuration information. The terminal device sends the first identifier of the selected configuration information to the second network device, so that the second network device can determine the configuration information selected by the terminal device according to the first identifier.

[0008] In combination with the first aspect, in some implementations of the first aspect, one or more first configuration information among the N first configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0009] In combination with the first aspect, in certain implementations of the first aspect, one or more first configuration information among the N first configuration information further includes an execution condition for switching to the primary and secondary cells.

[0010] In combination with the first aspect, in some implementations of the first aspect, the method further includes: sending first indication information to the second network device, the first indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, when more than one configuration information corresponds to the same primary and secondary cell, the second network device can identify the configuration information selected by the terminal device and indicate it to the selected target SN.

[0011] In combination with the first aspect, in some implementations of the first aspect, each of the N first configuration information further includes a second identifier, and the second identifier is used to identify one of the N first configuration information.

[0012] In a second aspect, a communication method is provided, characterized in that the method is executed by a second network device, where the second network device may refer to the second network device itself, or may refer to a processor, module, chip, or chip system in the second network device that implements the method. The method includes: sending M second configuration information to a first network device, each of the M second configuration information includes configuration information of a primary cell served by the second network device and a first identifier, the first identifier being used to identify one of the M second configuration information; and receiving a first identifier sent by a terminal device, the first identifier being an identifier of the configuration information selected by the terminal device.

[0013] According to the technical solution of the present application, the second network device sends M second configuration information to the first network device, wherein the second configuration information includes configuration information of the primary cell served by the second network device and a first identifier, and the first identifier is used to identify one configuration information in the M second configuration information. The second network device determines the configuration information selected by the terminal device based on the first identifier sent by the received terminal device.

[0014] In combination with the second aspect, in some implementations of the second aspect, the method further includes: determining, according to the first identifier sent by the terminal device, the configuration information of the primary cell included in the configuration information selected by the terminal device. Based on the above technical solution, the second network device can identify the configuration information of the primary cell included in the configuration information selected by the terminal device, so as to use the aligned configuration information with the terminal device in subsequent communications.

[0015] In combination with the second aspect, in some implementations of the second aspect, one or more of the M second configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0016] In combination with the second aspect, in certain implementations of the second aspect, one or more of the M second configuration information further include parameters related to execution conditions for switching to the primary and secondary cells.

[0017] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: determining the primary and secondary cells or the secondary node SN of the primary and secondary cells included in the configuration information selected by the terminal device according to the first identifier sent by the terminal device. Based on the above technical solution, the second network device can identify the target SN in the configuration information selected by the terminal device, and forward the SN reconfiguration completion message sent by the terminal device to the target SN, so that the target SN and the terminal device can communicate using aligned configuration information.

[0018] In combination with the second aspect, in some implementations of the second aspect, the method further includes: sending second indication information to a third network device, the second indication information being used to indicate an association relationship between configuration information of P primary and secondary cells associated with the third network device and the first identifier, where P is a positive integer less than or equal to M. Based on the above technical solution, the third network device can identify the configuration information selected by the terminal device, and further identify the configuration information of the primary and secondary cells in the configuration information selected by the terminal device.

[0019] In combination with the second aspect, in some implementations of the second aspect, before sending the second indication information to the third network device, the method further includes: receiving configuration information of the P primary and secondary cells sent by the third network device.

[0020] In combination with the second aspect, in some implementations of the second aspect, the method further includes: sending a first identifier of the configuration information selected by the terminal device to the third network device. Based on the above technical solution, the third network device can identify the configuration information selected by the terminal device, and further identify the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device.

[0021] In combination with the second aspect, in some implementations of the second aspect, the method further includes: sending third indication information to a third network device, the third indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, the third network device can identify the configuration information selected by the terminal device, and further identify the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device.

[0022] In a third aspect, a communication method is provided, which is executed by a first network device, where the first network device may refer to the first network device itself, or to a processor, module, chip, or chip system that implements the method in the first network device. The method includes: receiving M second configuration information sent by a second network device, each of the M second configuration information includes configuration information of a primary cell served by the second network device and a first identifier, the first identifier being used to identify one of the configuration information in the M second configuration information; sending N first configuration information to a terminal device, each of the N first configuration information includes configuration information of a primary cell served by the second network device, a first identifier, and an execution condition for switching to the primary cell, the N first configuration information includes the M first configuration information associated with the primary cell served by the second network device; wherein N and M are positive integers, and N is greater than or equal to M.

[0023] According to the above technical solution, the first network device receives M second configuration information sent by the second network device, the second configuration information includes the configuration information of the primary cell served by the second network device and the first identifier, the first identifier is used to identify one configuration information in the M second configuration information. The first network device sends N first configuration information to the terminal device, the first configuration information includes the first identifier, and the terminal device sends the first identifier of the selected configuration information to the second network device, so that the second network device can determine the configuration information selected by the terminal device.

[0024] In a fourth aspect, a communication method is provided, which is performed by a third network device, where the third network device may refer to the third network device itself, or may refer to a processor, module, chip, or chip system in the third network device that implements the method. The method includes: sending configuration information of P primary and secondary cells to a second network device, where the P primary and secondary cells are P primary and secondary cells of the third network device, where P is a positive integer.

[0025] Based on the above technical solution, the second network device can obtain configuration information of one or more primary and secondary cells.

[0026] In combination with the fourth aspect, in certain implementations of the fourth aspect, the method further includes: receiving a second indication message sent by a second network device, the second indication message being used to indicate the association between the configuration information of the P primary and secondary cells and the first identifier; receiving a first identifier of the configuration information selected by the terminal device sent by the second network device; and determining the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device according to the first identifier of the configuration information selected by the terminal device. Based on the above technical solution, the third network device can identify the configuration information selected by the terminal device, and further identify the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device.

[0027] In combination with the fourth aspect, in some implementations of the fourth aspect, the method further includes: receiving third indication information sent by the second network device, the third indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, the third network device can identify the configuration information selected by the terminal device, and further identify the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device.

[0028] In a fifth aspect, a communication method is provided, the method comprising: a first network device receives M second configuration information sent by a second network device, each of the M second configuration information comprises configuration information of a primary cell served by the second network device and a first identifier, the first identifier being used to identify one of the M second configuration information; the second network device sends N first configuration information to a terminal device, each of the N first configuration information comprises configuration information of the primary cell, an execution condition for switching to the primary cell and a first identifier, the M first configuration information being configuration information associated with the primary cell served by the second network device among the N first configuration information; the terminal device sends the first identifier of the configuration information selected by the terminal device to the second network device; wherein N and M are positive integers, and N is greater than or equal to M. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device.

[0029] In a sixth aspect, a communication method is provided, and the method is performed by a first network device, where the first network device may refer to the first network device itself, or may refer to a processor, module, chip, or chip system that implements the method in the first network device. The method includes: sending a first message to a second network device, the first message indicating K identifiers, the K identifiers being available identifiers of one or more third configuration information associated with the second network device; receiving Q third configuration information sent by the second network device, each of the Q third configuration information including configuration information of a primary cell served by the second network device and a third identifier, the third identifier being used to identify one of the configuration information in the third configuration information; wherein the third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K.

[0030] According to the technical solution of the present application, the first network device sends K available identifiers indicating one or more third configuration information associated with the second network device to the second network device, and the second network device sends Q third configuration information to the first network device, the third configuration information including the third identifier, wherein the Q third identifiers belong to the K identifiers. The second network device determines the identifier (third identifier) ​​of the configuration information under it according to the received K identifiers, and forwards it to the terminal device through the first network device, so that the second network device can determine the configuration information selected by the terminal device when receiving the third identifier of the selected configuration information sent by the terminal device.

[0031] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first information includes the following items: the first information indicates the maximum number of primary cells associated with the second network device; and / or, the first information indicates the maximum number of primary and secondary cells associated with the second network device; and / or, the first information indicates the maximum number of third configuration information associated with the second network device; and / or, the first information indicates the range of the identifier; and / or, the first information indicates the starting value of the identifier. Based on the above technical solution, one or more second network devices can reasonably allocate the identifier (third identifier) ​​of the configuration information under them, ensuring that the identifiers between different second network devices do not overlap, so that the first network device and the terminal device can identify unique configuration information through the identifier (third identifier).

[0032] In combination with the sixth aspect, in certain implementations of the sixth aspect, one or more of the Q third configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0033] In combination with the sixth aspect, in certain implementations of the sixth aspect, one or more of the Q third configuration information further include relevant parameters of the execution conditions for switching to the primary and secondary cells.

[0034] In combination with the sixth aspect, in certain implementations of the sixth aspect, the method also includes: sending at least one fourth configuration information to the terminal device, each fourth configuration information in the at least one fourth configuration information includes configuration information of the primary cell served by the second network device, a third identifier, and an execution condition for switching to the primary cell.

[0035] In the seventh aspect, a communication method is provided, which is executed by a second network device, where the second network device can refer to the second network device itself, or a processor, module, chip, or chip system that implements the method in the second network device. The method includes: receiving first information sent by a first network device, the first information indicating K identifiers, the K identifiers being available identifiers of one or more third configuration information associated with the second network device; sending Q third configuration information to the first network device, each of the Q third configuration information including configuration information of a primary cell served by the second network device and a third identifier, the third identifier being used to identify one of the configuration information in the third configuration information; receiving a third identifier sent by a terminal device, the third identifier being an identifier of the configuration information selected by the terminal device; wherein the third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K.

[0036] According to the technical solution of the present application, the second network device receives K available identifiers sent by the first network device indicating one or more third configuration information associated with the second network device, and the second network device sends Q third configuration information to the first network device, the third configuration information includes a third identifier, wherein the Q third identifiers belong to the K identifiers. The second network device determines the identifier (third identifier) ​​of the configuration information under it according to the received K identifiers, and forwards it to the terminal device through the first network device, so that the second network device can determine the configuration information selected by the terminal device when receiving the third identifier of the selected configuration information sent by the terminal device.

[0037] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first information includes one or more of the following: the first information indicates the maximum number of primary cells associated with the second network device; and / or, the first information indicates the maximum number of primary and secondary cells associated with the second network device; and / or, the first information indicates the maximum number of third configuration information associated with the second network device; and / or, the first information indicates the range of the identifier; and / or, the first information indicates the starting value of the identifier. Based on the above technical solution, one or more second network devices can reasonably allocate the identifier (third identifier) ​​of the configuration information under them, ensuring that the identifiers of different second network devices do not overlap, so that the first network device and the terminal device can identify unique configuration information through the identifier.

[0038] In combination with the seventh aspect, in some implementations of the seventh aspect, the method further includes: sending fourth indication information to a third network device, the fourth indication information being used to indicate an association relationship between the configuration information of X primary and secondary cells associated with the third network device and the third identifier, where X is a positive integer less than or equal to Q. Based on the above technical solution, the third network device can obtain the correspondence between the configuration information of the primary and secondary cells and the third identifier, so that the third network device can determine the configuration information of the primary and secondary cells selected by the terminal device based on the third identifier.

[0039] In combination with the seventh aspect, in certain implementations of the seventh aspect, before sending the fourth indication information to the third network device, the method further includes: receiving configuration information of the X primary and secondary cells sent by the third network device.

[0040] In combination with the seventh aspect, in some implementations of the seventh aspect, the method further includes: sending the third identifier sent by the terminal device to the third network device. Based on the above technical solution, the third network device can identify the configuration information selected by the terminal device, and further determine the configuration information of the primary and secondary cells in the configuration information selected by the terminal device.

[0041] In combination with the seventh aspect, in some implementations of the seventh aspect, the method further includes: sending fifth indication information to the third network device, the fifth indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, when more than one configuration information corresponds to the same primary and secondary cell, the third network device can identify the configuration information selected by the terminal device and determine the configuration information of the primary and secondary cells in the configuration information selected by the terminal device.

[0042] In an eighth aspect, a communication method is provided, the method comprising: a first network device sends a first message to a second network device, the first message indicates K identifiers, the K identifiers are available identifiers of one or more third configuration information associated with the second network device; the second network device sends Q third configuration information to the first network device, each of the Q third configuration information includes the configuration information of the primary cell served by the second network device and a third identifier, the third identifier is used to identify one of the configuration information in the third configuration information; the first network device sends the Q third configuration information to a terminal device; the terminal device sends the third identifier of the configuration information selected by the terminal device to the second network device; wherein the third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K. Based on the above technical solution, the second network device determines the identifier (third identifier) ​​of the conditional configuration thereof according to the received K identifiers, and forwards it to the terminal device through the first network device, so that the second network device can identify the configuration information selected by the terminal device when receiving the third identifier of the selected configuration information sent by the terminal device.

[0043] In a ninth aspect, a communication method is provided, and the method is performed by a second network device, where the second network device may refer to the second network device itself, or may refer to a processor, a module, a chip, or a chip system, etc., in the second network device that implements the method. The method includes: obtaining at least one fifth configuration information, each fifth configuration information in the at least one fifth configuration information includes configuration information of a primary cell and access resource information of the primary cell, wherein different fifth configuration information includes different access resource information of the primary cell; receiving an access request sent by a terminal device on a first access resource; and determining the configuration information selected by the terminal device according to the first access resource.

[0044] According to the technical solution of the present application, the second network device obtains at least one fifth configuration information, which includes access resource information of the main cell and configuration information of the main cell. The second network device receives an access request on the first access resource and determines the configuration information selected by the terminal device based on the first access resource.

[0045] In combination with the ninth aspect, in certain implementations of the ninth aspect, one or more of the at least one fifth configuration information also includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0046] In combination with the ninth aspect, in certain implementations of the ninth aspect, one or more of the at least one fifth configuration information also includes relevant parameters of the execution conditions for switching to the primary and secondary cells.

[0047] In combination with the ninth aspect, in some implementations of the ninth aspect, the method further includes: sending sixth indication information sent by the terminal device to a third network device, the sixth indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, when more than one configuration information corresponds to the same primary and secondary cell, the third network device can identify the configuration information selected by the terminal device and determine the configuration information of the primary and secondary cells in the configuration information selected by the terminal device.

[0048] In combination with the ninth aspect, in some implementations of the ninth aspect, the method further includes: sending the at least one fifth configuration information to the first network device.

[0049] In the tenth aspect, a communication method is provided, which is executed by a terminal device. The terminal device here can refer to the terminal device itself, or to a processor, module, chip, or chip system that implements the method in the terminal device. The method includes: receiving at least one sixth configuration information sent by a first network device, the sixth configuration information including configuration information of a primary cell, execution conditions for switching to the primary cell, and access resource information of the primary cell, wherein different sixth configuration information includes different access resource information of the primary cell; and sending an access request to the second network device on the first access resource.

[0050] According to the technical solution of the present application, the terminal device receives at least one sixth configuration information sent by the first network device, and the sixth configuration information includes access resource information. The terminal device sends an access request to the second network device on the first access resource, so that the second network device can determine the configuration information selected by the terminal device based on the first access resource.

[0051] In combination with the tenth aspect, in certain implementations of the tenth aspect, one or more of the at least one sixth configuration information also includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0052] In combination with the tenth aspect, in certain implementations of the tenth aspect, one or more of the at least one sixth configuration information also includes execution conditions for switching to the primary and secondary cells.

[0053] In combination with the tenth aspect, in some implementations of the tenth aspect, the method further includes: sending sixth indication information to the second network device, the sixth indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, when more than one configuration information corresponds to the same primary and secondary cell, the second network device can identify the configuration information selected by the terminal device and indicate it to the selected target SN.

[0054] In the eleventh aspect, a communication method is provided, including: the second network device obtains at least one fifth configuration information, each of the at least one fifth configuration information includes the configuration information of the primary cell and the access resource information of the primary cell, wherein different fifth configuration information includes different access resource information of the primary cell; the second network device sends the at least one fifth configuration information to the first network device; the first network device sends at least one sixth configuration information to the terminal device, the sixth configuration information includes the configuration information of the primary cell, the execution condition for switching to the primary cell and the access resource information of the primary cell, wherein different sixth configuration information includes different access resource information of the primary cell; the terminal device sends an access request to the second network device on the first access resource; the second network device determines the configuration information selected by the terminal device according to the first access resource. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device.

[0055] In the twelfth aspect, a communication method is provided, the method comprising: the second network device sends at least one seventh configuration information to the first network device, each seventh configuration information in the at least one seventh configuration information includes the configuration information of the primary cell and the RRC processing identifier, wherein different seventh configuration information includes different RRC processing identifiers; the first network device sends at least one eighth configuration information to the terminal device, the eighth configuration information includes the configuration information of the primary cell, the execution conditions for switching to the primary cell and the RRC processing identifier, wherein different eighth configuration information includes different RRC processing identifiers; the terminal device sends second information to the second network device, the second information is the RRC processing identifier of the configuration information selected by the terminal device; the second network device determines the configuration information selected by the terminal device according to the second information. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device.

[0056] In a thirteenth aspect, a communication method is provided, and the method is performed by a second network device, where the second network device may refer to the second network device itself, or may refer to a processor, a module, a chip, or a chip system, etc., in the second network device that implements the method. The method includes: sending at least one seventh configuration information to the first network device, each seventh configuration information in the at least one seventh configuration information includes configuration information and an RRC processing identifier of a primary cell, wherein different seventh configuration information includes different RRC processing identifiers; receiving second information sent by a terminal device, the second information being an RRC processing identifier of configuration information selected by the terminal device; and determining the configuration information selected by the terminal device according to the second information.

[0057] According to the technical solution of the present application, the second network device sends at least one seventh configuration information to the first network device, the seventh configuration information includes the configuration information of the primary cell and the RRC processing identifier, wherein different seventh configuration information includes different RRC processing identifiers; the second network device receives the RRC processing identifier of the configuration information selected by the terminal device sent by the terminal device. The second network device determines the configuration information selected by the terminal device according to the RRC processing identifier.

[0058] In combination with the thirteenth aspect, in certain implementations of the thirteenth aspect, the method further includes: determining, based on the second information, configuration information of the primary cell included in the configuration information selected by the terminal device. Based on the above technical solution, the second network device can identify the configuration information of the primary cell in the configuration information selected by the terminal device.

[0059] In combination with the thirteenth aspect, in certain implementations of the thirteenth aspect, one or more of the at least one seventh configuration information also includes configuration information of a primary or secondary cell, and the primary or secondary cell is associated with the primary cell.

[0060] In combination with the thirteenth aspect, in certain implementations of the thirteenth aspect, one or more of the at least one seventh configuration information also includes relevant parameters of the execution conditions for switching to the primary and secondary cells.

[0061] In combination with the thirteenth aspect, in certain implementations of the thirteenth aspect, the method further includes: determining, based on the second information, configuration information of the primary and secondary cells included in the configuration information selected by the terminal device or the secondary node SN of the primary and secondary cells. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device and determine the selected target SN.

[0062] In a fourteenth aspect, a communication method is provided, which is executed by a terminal device. The terminal device here may refer to the terminal device itself, or may refer to a processor, module, chip, or chip system that implements the method in the terminal device, and the method includes: receiving at least one eighth configuration information sent by a first network device, the eighth configuration information including configuration information of a primary cell, execution conditions for switching to the primary cell, and an RRC processing identifier, wherein different eighth configuration information include different RRC processing identifiers; and sending second information to a second network device, the second information being the RRC processing identifier of the configuration information selected by the terminal device.

[0063] According to the technical solution of the present application, the terminal device receives at least one eighth configuration information sent by the first network device, the eighth configuration information includes the configuration information of the primary cell, the execution condition for switching to the primary cell, and the RRC processing identifier, wherein different eighth configuration information includes different RRC processing identifiers. The terminal device sends the RRC processing identifier of the configuration information selected by the terminal device to the second network device, so that the second network device can determine the configuration information selected by the terminal device according to the RRC processing identifier.

[0064] In combination with the fourteenth aspect, in certain implementations of the fourteenth aspect, one or more of the at least one eighth configuration information also includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0065] In combination with the fourteenth aspect, in certain implementations of the fourteenth aspect, one or more of the at least one eighth configuration information also includes execution conditions for switching to the primary and secondary cells.

[0066] In a fifteenth aspect, a communication method is provided, including: the second network device sends at least one ninth configuration information to the first network device, each ninth configuration information in the at least one ninth configuration information includes the configuration information of the primary cell and the configuration information of the primary and secondary cells associated with the primary cell; the first network device sends at least one tenth configuration information to the terminal device, each tenth configuration information in the at least one tenth configuration information includes the configuration information of the primary cell, the execution condition of switching to the primary cell, and the configuration information of the primary and secondary cells associated with the primary cell; the terminal device sends third information to the second network device, the third information is used to indicate the primary and secondary cells included in the configuration information selected by the terminal device; the second network device determines the configuration information selected by the terminal device according to the third information. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device.

[0067] In a sixteenth aspect, a communication method is provided, and the method is performed by a second network device, where the second network device may refer to the second network device itself, or may refer to a processor, a module, a chip, or a chip system, etc., in the second network device that implements the method. The method includes: sending at least one ninth configuration information to a first network device, each ninth configuration information in the at least one ninth configuration information includes configuration information of a primary cell and configuration information of a primary and secondary cell associated with the primary cell; receiving third information sent by a terminal device, the third information being used to indicate the primary and secondary cells included in the configuration information selected by the terminal device; and determining the configuration information selected by the terminal device according to the third information.

[0068] According to the technical solution of the present application, the second network device sends at least one ninth configuration information to the first network device, and the ninth configuration information includes the configuration information of the main cell and the configuration information of the main and auxiliary cells associated with the main cell. The second network device receives the third information sent by the terminal device, and determines the configuration information selected by the terminal device based on the main and auxiliary cells indicated by the third information.

[0069] In combination with the sixteenth aspect, in certain implementations of the sixteenth aspect, different ninth configuration information corresponds to different primary and secondary cells. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device, and the second network device can determine the selected target SN and the MCG configuration required for the terminal device to communicate.

[0070] In combination with the sixteenth aspect, in certain implementations of the sixteenth aspect, the third information includes one or more of the following: the physical cell identifier PCI of the primary and secondary cells included in the configuration information selected by the terminal device, and the frequency of the primary and secondary cells included in the configuration information selected by the terminal device. Based on the above technical solution, the second network device can identify the primary and secondary cells in the configuration information selected by the terminal device, and further identify the selected configuration information, and enable the second network device to determine the selected target SN and the MCG configuration required for the terminal device to communicate.

[0071] In combination with the sixteenth aspect, in certain implementations of the sixteenth aspect, one or more of the at least one ninth configuration information also includes relevant parameters of the execution conditions for switching to the primary and secondary cells.

[0072] In combination with the sixteenth aspect, in some implementations of the sixteenth aspect, the method further includes: sending the seventh indication information to the third network device, the seventh indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, when more than one configuration information corresponds to the same primary and secondary cell, the third network device can identify the configuration information selected by the terminal device and determine the configuration information of the primary and secondary cells in the configuration information selected by the terminal device.

[0073] In combination with the sixteenth aspect, in some implementations of the sixteenth aspect, the method further includes: receiving seventh indication information sent by the terminal device, and forwarding the seventh indication information to the third network device. Based on the above technical solution, when more than one configuration information corresponds to the same primary and secondary cell, the third network device can identify the configuration information selected by the terminal device and determine the configuration information of the primary and secondary cells in the configuration information selected by the terminal device.

[0074] In the seventeenth aspect, a communication method is provided, which is executed by a terminal device. The terminal device here can refer to the terminal device itself, or to a processor, module, chip, or chip system that implements the method in the terminal device. The method includes: receiving at least one tenth configuration information sent by a first network device, each of the at least one tenth configuration information includes configuration information of a primary cell, execution conditions for switching to the primary cell, and configuration information of primary and secondary cells associated with the primary cell; sending third information to a second network device, the third information being used to indicate the primary and secondary cells included in the configuration information selected by the terminal device.

[0075] According to the technical solution of the present application, a terminal device receives at least one tenth configuration information sent by a first network device, the tenth configuration information includes configuration information of a primary cell, execution conditions for switching to the primary cell, and configuration information of primary and secondary cells associated with the primary cell, and the terminal device sends third information to a second network device, which is used to indicate the primary and secondary cells included in the configuration information selected by the terminal device. The second network device can determine the configuration information selected by the terminal according to the indicated primary and secondary cells by determining the third information.

[0076] In combination with the seventeenth aspect, in some implementations of the seventeenth aspect, the method further includes: sending seventh indication information to the second network device, the seventh indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Based on the above technical solution, based on the above technical solution, when more than one configuration information corresponds to the same primary and secondary cell, the second network device can identify the configuration information selected by the terminal device and indicate it to the selected target SN.

[0077] In the eighteenth aspect, a communication method is provided, the method comprising: a first network device receives at least one eleventh configuration information sent by a second network device, each of the at least one eleventh configuration information includes the configuration information of the primary cell served by the second network device; the first network device sends fourth information to the second network device, the fourth information is used to indicate the association relationship between at least one configuration information associated with the second network device and at least one fourth identifier, the fourth identifier is used to identify the eleventh configuration information; the first network device sends at least one twelfth configuration information to a terminal device, each of the at least one twelfth configuration information includes the configuration information of the primary cell, the execution condition for switching to the primary cell and the fourth identifier; the terminal device sends the fourth identifier of the configuration information selected by the terminal device to the second network device; the second network device determines the configuration information selected by the terminal device according to the fourth identifier. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device.

[0078] In a nineteenth aspect, a communication method is provided, and the method is executed by a first network device, where the first network device may refer to the first network device itself, or may refer to a processor, a module, a chip, or a chip system, etc., in the first network device that implements the method. The method includes: receiving at least one eleventh configuration information sent by a second network device, each of the at least one eleventh configuration information includes configuration information of a primary cell served by the second network device; sending fourth information to the second network device, the fourth information is used to indicate an association relationship between at least one configuration information associated with the second network device and at least one fourth identifier, the fourth identifier is used to identify the eleventh configuration information; sending at least one twelfth configuration information to a terminal device, each of the at least one twelfth configuration information includes configuration information of the primary cell, an execution condition for switching to the primary cell, and the fourth identifier.

[0079] According to the technical solution of the present application, the first network device receives at least one eleventh configuration information sent by the second network device, and the eleventh configuration information includes the configuration information of the primary cell served by the second network device. The first network device sends fourth information to the second network device, which is used to indicate the association relationship between the at least one associated configuration information and the at least one fourth identifier, wherein the fourth identifier is used to identify the eleventh configuration information. The first network device sends at least one twelfth configuration information to the terminal device, and the twelfth configuration information includes the fourth identifier. It is possible for the second network device to determine the selected configuration information after receiving the fourth identifier sent by the terminal device.

[0080] In combination with the nineteenth aspect, in certain implementations of the nineteenth aspect, one or more of the at least one eleventh configuration information also includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0081] In combination with the nineteenth aspect, in certain implementations of the nineteenth aspect, one or more of the at least one eleventh configuration information also include relevant parameters of the execution conditions for switching to the primary and secondary cells.

[0082] In combination with the nineteenth aspect, in certain implementations of the nineteenth aspect, one or more of the at least one twelfth configuration information also includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0083] In combination with the nineteenth aspect, in certain implementations of the nineteenth aspect, one or more of the at least one twelfth configuration information also includes execution conditions for switching to the primary and secondary cells.

[0084] In combination with the nineteenth aspect, in certain implementations of the nineteenth aspect, the method further includes: receiving a first request message sent by the second network device, the first request message being used to request the first network device to send the association relationship between the at least one configuration information and the at least one fourth identifier. Based on the above technical solution, the second network device can identify the configuration information selected by the terminal device, and the second network device can determine the selected target SN and the MCG configuration required for communication by the terminal device.

[0085] In the twentieth aspect, a communication method is provided, which is executed by a terminal device. The terminal device here may refer to the terminal device itself, or to a processor, module, chip, or chip system that implements the method in the terminal device. The method includes: receiving fifth information, the fifth information including at least one of the following: a first condition configuration, a second condition configuration, and a third condition configuration; wherein the first condition configuration includes the configuration information of the main cell and the execution condition for switching to the main cell, but does not include the configuration information of the main and auxiliary cells; the second condition configuration includes the configuration information of the main cell and the execution condition for switching to the main cell, as well as the configuration information of the target main and auxiliary cells; the third condition configuration includes the configuration information of the main cell and the execution condition for switching to the main cell, as well as the configuration information of the candidate main and auxiliary cells and the execution condition for switching to the candidate main and auxiliary cells; performing cell selection, and determining to use the target configuration information when the cell selected by the terminal device is the main cell.

[0086] According to the technical solution of the present application, the terminal device receives the fifth information. When the selected cell corresponds to multiple configurations, the selected target configuration information can be determined according to certain rules, so as to align the configuration information with the network device in subsequent communications.

[0087] In conjunction with the twentieth aspect, in certain implementations of the twentieth aspect, when the fifth information includes the first conditional configuration, the target configuration information is the first conditional configuration. Based on the above technical solution, the terminal device can determine the selected target configuration information.

[0088] In conjunction with the twentieth aspect, in certain implementations of the twentieth aspect, when the fifth information does not include the first condition configuration but includes the second condition configuration, the target configuration information is the second condition configuration. Based on the above technical solution, the terminal device can determine the selected target configuration information.

[0089] In conjunction with the twentieth aspect, in certain implementations of the twentieth aspect, when the fifth information does not include the first condition configuration and the second condition configuration, the target configuration information is the third condition configuration. Based on the above technical solution, the terminal device can determine the selected target configuration information.

[0090] In conjunction with the twentieth aspect, in certain implementations of the twentieth aspect, when the third conditional configuration includes multiple conditional configuration information, the target configuration information is the first conditional configuration information among the multiple conditional configuration information. Based on the above technical solution, the terminal device can determine the selected target configuration information.

[0091] In conjunction with the twentieth aspect, in certain implementations of the twentieth aspect, when the third conditional configuration includes multiple conditional configuration information, it further includes: receiving fifth information sent by a network device, the fifth information is used to indicate first conditional configuration information, the target configuration information is the first conditional configuration information, and the first conditional configuration information is one of the multiple conditional configuration information. Based on the above technical solution, the terminal device can determine the selected target configuration information.

[0092] In combination with the twentieth aspect, in certain implementations of the twentieth aspect, when the third condition configuration includes multiple condition configuration information, the target configuration information is the first condition configuration information, and the first condition configuration information includes configuration information of the first auxiliary primary cell, wherein the signal quality of the first candidate primary and auxiliary cell is greater than the signal quality of the second candidate primary and auxiliary cell, and the second candidate primary and auxiliary cell is any one of the candidate primary and auxiliary cells included in any one of the multiple condition configuration information except the first condition configuration information. Based on the above technical solution, the terminal device can determine the selected target configuration information.

[0093] In conjunction with the twentieth aspect, in certain implementations of the twentieth aspect, the method further includes: the candidate primary and secondary cells are in a deactivated state. Based on the above technical solution, the terminal device can determine the selected target configuration information.

[0094] In the twenty-first aspect, a communication device is provided, including: a transceiver unit for receiving N first configuration information sent by a first network device, each of the N first configuration information including configuration information of a main cell, execution conditions for switching to the main cell and a first identifier, the N first configuration information including M first configuration information associated with the main cell served by a second network device, and the first identifier is used to identify one configuration information in the M first configuration information; the transceiver unit is used to send the first identifier of the configuration information selected by the terminal device to the second network device.

[0095] In combination with the twenty-first aspect, in certain implementations of the twenty-first aspect, the transceiver unit is also used to: send first indication information to the second network device, and the first indication information is used to indicate whether the configuration information selected by the terminal device includes execution conditions for switching to the primary and secondary cells.

[0096] In the twenty-second aspect, a communication device is provided, including: a transceiver unit, used to send M second configuration information to a first network device, each of the M second configuration information includes configuration information of a primary cell served by the second network device and a first identifier, the first identifier being used to identify one configuration information among the M second configuration information; the transceiver unit is used to receive a first identifier sent by a terminal device, the first identifier being an identifier of the configuration information selected by the terminal device.

[0097] In combination with the twenty-second aspect, in some implementations of the twenty-second aspect, it also includes: a processing unit, used to determine the configuration information of the primary cell included in the configuration information selected by the terminal device based on the first identifier sent by the terminal device.

[0098] In combination with the twenty-second aspect, in certain implementations of the twenty-second aspect, the processing unit is further used to: determine the primary and secondary cells or the secondary nodes SN of the primary and secondary cells included in the configuration information selected by the terminal device according to the first identifier sent by the terminal device.

[0099] In combination with the twenty-second aspect, in certain implementations of the twenty-second aspect, the transceiver unit is also used to: send second indication information to a third network device, the second indication information being used to indicate the association relationship between the configuration information of P primary and secondary cells associated with the third network device and the first identifier, wherein P is a positive integer less than or equal to M.

[0100] In combination with the twenty-second aspect, in certain implementations of the twenty-second aspect, before sending the second indication information to the third network device, the transceiver unit is further used to: receive configuration information of the P primary and secondary cells sent by the third network device.

[0101] In combination with the twenty-second aspect, in certain implementations of the twenty-second aspect, the transceiver unit is further used to: send a first identifier of the configuration information selected by the terminal device to the third network device.

[0102] In combination with the twenty-second aspect, in certain implementations of the twenty-second aspect, the transceiver unit is also used to: send third indication information to a third network device, where the third indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

[0103] In the twenty-third aspect, a communication device is provided, including: a transceiver unit, used to receive M second configuration information sent by a second network device, each of the M second configuration information includes the configuration information of the primary cell served by the second network device and a first identifier, and the first identifier is used to identify one configuration information among the M second configuration information; the transceiver unit is used to send N first configuration information to a terminal device, each of the N first configuration information includes the configuration information of the primary cell served by the second network device, a first identifier and an execution condition for switching to the primary cell, and the N first configuration information includes the M first configuration information associated with the primary cell served by the second network device; wherein N and M are positive integers, and N is greater than or equal to M.

[0104] In the twenty-fourth aspect, a communication device is provided, including: a transceiver unit, used to send configuration information of P primary and secondary cells to the second network device, the P primary and secondary cells are P primary and secondary cells of the third network device, where P is a positive integer.

[0105] In combination with the twenty-fourth aspect, in certain implementations of the twenty-fourth aspect, before receiving the second indication information sent by the second network device, the transceiver unit is also used to: receive the second indication information sent by the second network device, the second indication information being used to indicate the association between the configuration information of the P primary and secondary cells and the first identifier; the transceiver unit is also used to receive the first identifier of the configuration information selected by the terminal device sent by the second network device; and the processing unit is used to determine the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device based on the first identifier of the configuration information selected by the terminal device.

[0106] In combination with the twenty-fourth aspect, in certain implementations of the twenty-fourth aspect, the transceiver unit is also used to: receive third indication information sent by the second network device, and the third indication information is used to indicate whether the configuration information selected by the terminal device includes execution conditions for switching to the primary and secondary cells.

[0107] In a twenty-fifth aspect, a communication device is provided, including: a transceiver unit, configured for a first network device to receive M second configuration information sent by a second network device, each second configuration information in the M second configuration information including configuration information of a primary cell served by the second network device and a first identifier, the first identifier being used to identify one configuration information in the M second configuration information;

[0108] The transceiver unit is used for the second network device to send N first configuration information to the terminal device, each of the N first configuration information includes configuration information of the main cell, execution conditions for switching to the main cell and a first identifier, and the M first configuration information are configuration information associated with the main cell served by the second network device among the N first configuration information; the transceiver unit is used for the terminal device to send the first identifier of the configuration information selected by the terminal device to the second network device; wherein N and M are positive integers, and N is greater than or equal to M.

[0109] In the twenty-sixth aspect, a communication device is provided, including: a transceiver unit, used to send first information to a second network device, the first information indicating K identifiers, the K identifiers being available identifiers of one or more third configuration information associated with the second network device; the transceiver unit, used to receive Q third configuration information sent by the second network device, each of the Q third configuration information including configuration information of a primary cell served by the second network device and a third identifier, the third identifier being used to identify one of the configuration information in the third configuration information; wherein the third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K.

[0110] In combination with the twenty-sixth aspect, in certain implementations of the twenty-sixth aspect, the transceiver unit is also used to: send at least one fourth configuration information to the terminal device, each fourth configuration information in the at least one fourth configuration information includes the configuration information of the primary cell served by the second network device, a third identifier, and an execution condition for switching to the primary cell.

[0111] In the twenty-seventh aspect, a communication device is provided, including: a transceiver unit, used to receive first information sent by a first network device, the first information indicating K identifiers, the K identifiers being available identifiers of one or more third configuration information associated with the second network device; the transceiver unit, used to send Q third configuration information to the first network device, each of the Q third configuration information including configuration information of a primary cell served by the second network device and a third identifier, the third identifier being used to identify one of the third configuration information; the transceiver unit, used to receive a third identifier sent by a terminal device, the third identifier being an identifier of the configuration information selected by the terminal device; wherein the third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K.

[0112] In combination with aspect 27, in certain implementations of aspect 27, the transceiver unit is also used to: send fourth indication information to a third network device, the fourth indication information being used to indicate the association relationship between the configuration information of X primary and secondary cells associated with the third network device and the third identifier, where X is a positive integer less than or equal to Q.

[0113] In combination with the twenty-seventh aspect, in certain implementations of the twenty-seventh aspect, before sending the fourth indication information to the third network device, the transceiver unit is further used to: receive configuration information of the X primary and secondary cells sent by the third network device.

[0114] In combination with the twenty-seventh aspect, in certain implementations of the twenty-seventh aspect, the transceiver unit is further used to: send the third identifier sent by the terminal device to the third network device.

[0115] In combination with aspect 27, in certain implementations of aspect 27, the transceiver unit is also used to: send fifth indication information to a third network device, where the fifth indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

[0116] In the twenty-eighth aspect, a communication device is provided, including: a transceiver unit, used by a first network device to send first information to a second network device, the first information indicating K identifiers, the K identifiers being available identifiers of one or more third configuration information associated with the second network device; the transceiver unit, used by the second network device to send Q third configuration information to the first network device, each of the Q third configuration information including configuration information of a primary cell served by the second network device and a third identifier, the third identifier being used to identify one configuration information in the third configuration information; the transceiver unit, used by the first network device to send the Q third configuration information to a terminal device; the transceiver unit, used by the terminal device to send the third identifier of the configuration information selected by the terminal device to the second network device; wherein the third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K

[0117] In the twenty-ninth aspect, a communication device is provided, including: a processing unit, used to obtain at least one fifth configuration information, each fifth configuration information in the at least one fifth configuration information includes configuration information of a main cell and access resource information of the main cell, wherein different fifth configuration information includes different access resource information of the main cell; a transceiver unit, used to receive an access request sent by a terminal device on a first access resource; and the processing unit, used to determine the configuration information selected by the terminal device based on the first access resource.

[0118] In combination with the 29th aspect, in certain implementations of the 29th aspect, the transceiver unit is also used to: send the sixth indication information sent by the terminal device to the third network device, and the sixth indication information is used to indicate whether the configuration information selected by the terminal device includes the execution conditions for switching to the primary and secondary cells.

[0119] In combination with the twenty-ninth aspect, in certain implementations of the twenty-ninth aspect, the transceiver unit is further used to: send the at least one fifth configuration information to the first network device.

[0120] In the thirtieth aspect, a communication device is provided, including: a transceiver unit, used to receive at least one sixth configuration information sent by a first network device, the sixth configuration information including configuration information of a primary cell, execution conditions for switching to the primary cell, and access resource information of the primary cell, wherein different sixth configuration information includes different access resource information of the primary cell; the transceiver unit is used to send an access request to the second network device on the first access resource.

[0121] In combination with the 30th aspect, in certain implementations of the 30th aspect, the transceiver unit is also used to: send sixth indication information to the second network device, and the sixth indication information is used to indicate whether the configuration information selected by the terminal device includes execution conditions for switching to the primary and secondary cells.

[0122] In the thirty-first aspect, a communication device is provided, including: a processing unit, used for the second network device to obtain at least one fifth configuration information, each of the at least one fifth configuration information includes the configuration information of the main cell and the access resource information of the main cell, wherein different fifth configuration information includes different access resource information of the main cell; a transceiver unit, used for the second network device to send the at least one fifth configuration information to the first network device; the transceiver unit, used for the first network device to send at least one sixth configuration information to the terminal device, the sixth configuration information includes the configuration information of the main cell, the execution conditions for switching to the main cell and the access resource information of the main cell, wherein different sixth configuration information includes different access resource information of the main cell; the transceiver unit, used for the terminal device to send an access request to the second network device on the first access resource; the processing unit, used for the second network device to determine the configuration information selected by the terminal device based on the first access resource.

[0123] In the thirty-second aspect, a communication device is provided, including: a transceiver unit, used by a second network device to send at least one seventh configuration information to a first network device, each seventh configuration information in the at least one seventh configuration information includes configuration information of a primary cell and an RRC processing identifier, wherein different seventh configuration information include different RRC processing identifiers; the transceiver unit, used by the first network device to send at least one eighth configuration information to a terminal device, the eighth configuration information including configuration information of the primary cell, execution conditions for switching to the primary cell and an RRC processing identifier, wherein different eighth configuration information include different RRC processing identifiers; the transceiver unit, used by the terminal device to send second information to the second network device, the second information being the RRC processing identifier of the configuration information selected by the terminal device; and a processing unit, used by the second network device to determine the configuration information selected by the terminal device based on the second information.

[0124] In the thirty-third aspect, a communication device is provided, including: a transceiver unit, used to send at least one seventh configuration information to a first network device, each seventh configuration information in the at least one seventh configuration information includes configuration information of a primary cell and an RRC processing identifier, wherein different seventh configuration information include different RRC processing identifiers; the transceiver unit is used to receive second information sent by a terminal device, the second information being the RRC processing identifier of the configuration information selected by the terminal device; and a processing unit, used to determine the configuration information selected by the terminal device based on the second information.

[0125] In combination with the thirty-third aspect, in certain implementations of the thirty-third aspect, the processing unit is further used to: determine, based on the second information, the configuration information of the primary cell included in the configuration information selected by the terminal device.

[0126] In combination with the thirty-third aspect, in certain implementations of the thirty-third aspect, the processing unit is further used to: determine, based on the second information, the configuration information selected by the terminal device including the configuration information of the primary and secondary cells or the secondary node SN of the primary and secondary cells.

[0127] In the thirty-fourth aspect, a communication device is provided, including: a transceiver unit for receiving at least one eighth configuration information sent by a first network device, the eighth configuration information including configuration information of a primary cell, execution conditions for switching to the primary cell, and an RRC processing identifier, wherein different eighth configuration information include different RRC processing identifiers; the transceiver unit is used to send second information to a second network device, the second information being the RRC processing identifier of the configuration information selected by the terminal device.

[0128] In the thirty-fifth aspect, a communication device is provided, including: a transceiver unit, used by a second network device to send at least one ninth configuration information to a first network device, each ninth configuration information in the at least one ninth configuration information includes the configuration information of a primary cell and the configuration information of primary and secondary cells associated with the primary cell; the transceiver unit, used by the first network device to send at least one tenth configuration information to a terminal device, each tenth configuration information in the at least one tenth configuration information includes the configuration information of the primary cell, the execution conditions for switching to the primary cell, and the configuration information of the primary and secondary cells associated with the primary cell; the transceiver unit, used by the terminal device to send third information to the second network device, the third information being used to indicate the primary and secondary cells included in the configuration information selected by the terminal device; a processing unit, used by the second network device to determine the configuration information selected by the terminal device based on the third information.

[0129] In the thirty-sixth aspect, a communication device is provided, including: a transceiver unit, sending at least one ninth configuration information to a first network device, each ninth configuration information in the at least one ninth configuration information includes configuration information of a primary cell and configuration information of primary and secondary cells associated with the primary cell; the transceiver unit is used to receive third information sent by a terminal device, the third information is used to indicate the primary and secondary cells included in the configuration information selected by the terminal device; and a processing unit is used to determine the configuration information selected by the terminal device based on the third information.

[0130] In combination with the thirty-sixth aspect, in certain implementations of the thirty-sixth aspect, the transceiver unit is also used to: send the seventh indication information to the third network device, and the seventh indication information is used to indicate whether the configuration information selected by the terminal device includes the execution conditions for switching to the primary and secondary cells.

[0131] In combination with the thirty-sixth aspect, in certain implementations of the thirty-sixth aspect, the transceiver unit is further used to: receive seventh indication information sent by the terminal device, and forward the seventh indication information to the third network device.

[0132] In the thirty-seventh aspect, a communication device is provided, comprising: a transceiver unit for receiving at least one tenth configuration information sent by a first network device, each of the at least one tenth configuration information including configuration information of a primary cell, execution conditions for switching to the primary cell, and configuration information of primary and secondary cells associated with the primary cell; the transceiver unit is for sending third information to a second network device, the third information being used to indicate the primary and secondary cells included in the configuration information selected by the terminal device.

[0133] In combination with aspect 37, in certain implementations of aspect 37, the transceiver unit is further used to: send seventh indication information to the second network device, and the seventh indication information is used to indicate whether the configuration information selected by the terminal device includes execution conditions for switching to the primary and secondary cells.

[0134] In the thirty-eighth aspect, a communication device is provided, including: a transceiver unit, used by a first network device to receive at least one eleventh configuration information sent by a second network device, each of the at least one eleventh configuration information includes the configuration information of a primary cell served by the second network device; the transceiver unit, used by the first network device to send fourth information to the second network device, the fourth information being used to indicate an association relationship between at least one configuration information associated with the second network device and at least one fourth identifier, the fourth identifier being used to identify the eleventh configuration information; the transceiver unit, used by the first network device to send at least one twelfth configuration information to a terminal device, each of the at least one twelfth configuration information includes the configuration information of the primary cell, the execution conditions for switching to the primary cell and the fourth identifier; the transceiver unit, used by the terminal device to send the fourth identifier of the configuration information selected by the terminal device to the second network device; and a processing unit, used by the second network device to determine the configuration information selected by the terminal device based on the fourth identifier.

[0135] In the thirty-ninth aspect, a communication device is provided, including: a transceiver unit, used to receive at least one eleventh configuration information sent by a second network device, each of the at least one eleventh configuration information includes the configuration information of a primary cell served by the second network device; the transceiver unit, used to send fourth information to the second network device, the fourth information being used to indicate an association relationship between at least one configuration information associated with the second network device and at least one fourth identifier, the fourth identifier being used to identify the eleventh configuration information; the transceiver unit, used to send at least one twelfth configuration information to a terminal device, each of the at least one twelfth configuration information including the configuration information of the primary cell, the execution conditions for switching to the primary cell and the fourth identifier.

[0136] In combination with the thirty-ninth aspect, in certain implementations of the thirty-ninth aspect, the transceiver unit is also used to: receive a first request message sent by the second network device, the first request message being used to request the first network device to send the association relationship between the at least one configuration information and the at least one fourth identifier.

[0137] In the fortieth aspect, a communication device is provided, including: a transceiver unit, used to receive fifth information, the fifth information including at least one of the following: a first condition configuration, a second condition configuration, and a third condition configuration; wherein the first condition configuration includes the configuration information of the main cell and the execution condition for switching to the main cell, but does not include the configuration information of the main and auxiliary cells; the second condition configuration includes the configuration information of the main cell and the execution condition for switching to the main cell, and the configuration information of the target main and auxiliary cells; the third condition configuration includes the configuration information of the main cell and the execution condition for switching to the main cell, and the configuration information of the candidate main and auxiliary cells and the execution condition for switching to the candidate main and auxiliary cells; a processing unit, used to perform cell selection, and determine to use the target configuration information when the cell selected by the terminal device is the main cell.

[0138] In combination with the 40th aspect, in certain implementations of the 40th aspect, when the third conditional configuration includes multiple conditional configuration information, the transceiver unit is also used to: receive fifth information sent by the network device, the fifth information is used to indicate first conditional configuration information, the target configuration information is the first conditional configuration information, and the first conditional configuration information is one of the multiple conditional configuration information.

[0139] On the forty-first aspect, a communication device is provided, characterized in that it comprises a unit for executing the twenty-first aspect or any possible implementation of the twenty-first aspect to a unit for executing the fortieth aspect or any possible implementation of the fortieth aspect.

[0140] In the forty-second aspect, a computer-readable storage medium is provided, characterized in that it includes a computer program or instructions, which, when the computer program or the instructions are run on a computer, enable the computer to execute a method such as in the first aspect or any possible implementation of the first aspect to a method for executing the twentieth aspect or any possible implementation of the twentieth aspect.

[0141] In the forty-third aspect, a computer program product is provided, characterized in that it contains instructions, which, when executed on a computer, cause the computer to execute a method as in the first aspect or any possible implementation of the first aspect to a method for executing the twentieth aspect or any possible implementation of the twentieth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0142] Figure 1 A dual connectivity + carrier aggregation communication system is shown.

[0143] Figure 2 is a possible implementation process for CHO with candidate SCG.

[0144] Figure 3 Figure 2 is a configuration framework diagram of CHO with candidate SCG.

[0145] Figure 4 A schematic flowchart of a communication method 400 provided in an embodiment of the present application.

[0146] Figure 5 A schematic flow chart of a communication method 500 provided in an embodiment of the present application.

[0147] Figure 6 A schematic flowchart of a communication method 600 provided in an embodiment of the present application.

[0148] Figure 7 A schematic flowchart of a communication method 700 provided in an embodiment of the present application.

[0149] Figure 8 A schematic flowchart of a communication method 800 provided in an embodiment of the present application.

[0150] Fig. 9 A schematic flowchart of a communication method 900 provided in an embodiment of the present application.

[0151] Fig.10 A schematic flowchart of a communication method 1000 provided in an embodiment of the present application.

[0152] Fig.11 A schematic flowchart of a communication method 1100 provided in an embodiment of the present application.

[0153] Fig.12 A schematic flowchart of a communication method 1200 provided in an embodiment of the present application.

[0154] Fig.13 A schematic flowchart of a communication method 1300 provided in an embodiment of the present application.

[0155] Fig.14 A schematic flowchart of a communication method 1400 provided in an embodiment of the present application.

[0156] Fig.15 A schematic flowchart of a communication method 1500 provided in an embodiment of the present application.

[0157] Fig.16 A schematic flow chart of a communication method 1600 provided in an embodiment of the present application

[0158] Fig.17 A schematic block diagram of a communication device provided in this application.

[0159] Fig.18 A schematic block diagram of a communication device provided in this application. DETAILED DESCRIPTION

[0160] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0161] To facilitate understanding, the terms in this application are first explained.

[0162] (1) Terminal equipment

[0163] In this application, terminal devices may be various types of devices that provide voice and / or data connectivity to users, and may also be referred to as terminals, user equipment (UE), mobile stations, mobile terminals, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, aerospace equipment, etc. In the embodiments of this application, the chip used in the above-mentioned devices may also be referred to as a terminal.

[0164] (2) Network equipment

[0165] The network device in the embodiment of the present application may be an access network device such as a base station, which may be a base station (base transceiver station, BTS) in a global system of mobile communication (GSM) or code division multiple access (code division multiple access, CDMA), or a base station in a wideband code division multiple access (WCDMA) system, or an evolutionary base station (eNB or eNodeB) in an LTE system, a next generation base station (next generation NodeB, gNB) in a fifth generation (5G) mobile communication system, a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network node. For example, a network node may also be a module or unit that completes part of the functions of a base station, for example, a centralized unit (CU) or a distributed unit (DU). Among them, CU and DU respectively complete part of the protocol stack functions of the base station. In addition, the functions of the CU may be implemented by multiple entities. For example, the functions of the CU control plane (CP) and the user plane (UP) are separated to form a CU control plane (CU-CP) and a CU user plane (CU-UP). For example, the CU-CP and the CU-UP may be implemented by different functional entities and connected via an E1 interface, and the CU-CP and the CU-UP may be coupled to the DU.

[0166] (3) Dual connection

[0167] In an embodiment of the present application, the dual-connection communication system may be a new radio dual connectivity (NR-DC) system, in which the main base station is an NR base station connected to a 5G core network, and the auxiliary base station is an NR base station.

[0168] Alternatively, the dual-connectivity communication system can be a next generation (NG) radio access network (RAN) evolved universal terrestrial radio access (E-UTRA) and NR dual connectivity (NG-RAN E-UTRA-NR dual connectivity, NGEN-DC) system, in which the main base station is an LTE base station connected to the 5G core network, and the auxiliary base station is a NR base station.

[0169] Alternatively, the dual-connectivity communication system may be an E-UTRA and NR dual-connectivity (E-UTRA-NR dualconnectivity, EN-DC) system, in which the primary base station is an LTE base station connected to a 4G core network, and the secondary base station is an NR base station.

[0170] Alternatively, the dual-connectivity communication system can be a dual-connectivity (NR-E-UTRA dual connectivity, NE-DC) system of NR and E-UTRA, in which the main base station is an NR base station connected to the 5G core network, and the auxiliary base station is an LTE base station.

[0171] The above dual-connectivity communication systems may be collectively referred to as multi-radio dual connectivity (MR-DC) communication systems.

[0172] In a dual-connection communication system, a group of service cells associated with a master base station may be referred to as a master cell group (MCG). The master cell group includes a primary cell (PCell). The master base station may also be referred to as a master node (MN). A group of service cells associated with a secondary base station may be referred to as a secondary cell group (SCG), and the primary cell in the secondary cell group may be referred to as a primary secondary cell (PSCell). The secondary base station may also be referred to as a secondary node (SN).

[0173] (4) Carrier aggregation

[0174] Based on the LTE system, in order to meet the higher requirements of the communication system, the Long Term Evolution Advance (LTE-A) system proposed the carrier aggregation technology (Carrier Aggregation, CA). Carrier aggregation includes intra-band carrier aggregation and inter-band carrier aggregation. Among them, intra-band carrier aggregation is to aggregate two or more LTE carriers on the same frequency band, also known as component carriers (CC), to support a transmission bandwidth greater than 20MHz and a maximum of no more than 100MHz. Inter-band carrier aggregation is to aggregate LTE carriers belonging to two or more different frequency bands and use them together. Base stations and terminal devices can transmit and receive on multiple frequency bands at the same time. The purpose is to provide a larger bandwidth for user devices with corresponding capabilities and improve the peak rate of terminal devices.

[0175] (5) Dual connectivity + carrier aggregation

[0176] like Figure 1 As shown, when dual connectivity is combined with a carrier set, the cell group under the primary station is a primary cell group (MCG), and the cell group under the secondary station is a secondary cell group (SCG). The primary cell group may include a primary cell (PCell) and a secondary cell (SCell), and the secondary cell group may include a primary secondary cell (PSCell) and a secondary cell (SCell).

[0177] (6) Conditional handover (CHO)

[0178] CHO can be understood as the process in which a terminal device switches from a source base station to a target base station when the switching execution conditions are met.

[0179] In the R16 version, the CHO process is used to perform a PCell change, and the secondary cell group (SCG) is released when the PCell change is performed.

[0180] (7) CHO with target SCG

[0181] CHO with target SCG can be understood as changing SCG while changing PCell, or in other words, switching PSCell can be completed while switching PCell. Target SCG can also become default SCG. CHO with target SCG can be understood as including / associating a default PSCell configuration in the configuration of each candidate PCell. When the execution condition of PCell is met, it switches to the included / associated PSCell configuration while switching to the PCell that meets the condition.

[0182] (8) Conditional PSCell Addition / Change (CPAC)

[0183] CPAC includes Conditional PSCell Addition (CPA) and Conditional PSCell change (CPC).

[0184] The CPA process can be understood as executing the PSCell adding process when the PSCell adding conditions are met.

[0185] The CPC process can be understood as executing the PSCell change process when the PSCell change conditions are met.

[0186] (9) CHO with candidate SCGs

[0187] If the terminal device releases the secondary cell group when performing CHO switching, the throughput during switching will be affected. On this basis, if the PSCell is changed while changing the PCell based on CHO with a target SCG, the above problem can be solved to a certain extent. However, considering that when performing CHO switching with a target SCG, the link quality of the configured PSCell may not be good enough, or the terminal device may not access the best PSCell after switching the PCell, this will also affect the throughput of the terminal device. In order to further solve this problem, CHO with a target MCG and multiple candidate SGCs for CPA / CPC is proposed, or it can also be called CHO with candidate SCG.

[0188] In a CHO configuration with a candidate SCG, each candidate PCell is associated with one or more candidate PSCells. Therefore, the configuration information includes the configuration information of the PCell and the execution conditions of the PCell, as well as the configuration information of the candidate PSCell associated with the PCell and the execution conditions corresponding to the candidate PSCell.

[0189] In the CHO process with a candidate SCG, if the execution conditions of the candidate PCell and the execution conditions of its associated PSCell are satisfied, the change of the PCell and the change of the PSCell are executed.

[0190] refer to Figure 2 , the main steps for CHO with SCG candidate include:

[0191] Step S210: The source MN sends a handover request message to a candidate MN. The candidate MN may include one or more.

[0192] Step S220: The candidate MN sends an SN adding request message to the candidate SN where the candidate PSCell is located, requesting the candidate SN to prepare resources. There may be one or more candidate SNs.

[0193] Step S230: The candidate SN replies to the corresponding candidate MN with an SN adding request confirmation message.

[0194] For the detailed description of steps S210-S230, please refer to the existing protocol and will not be repeated here.

[0195] Step S240: The candidate MN sends a Handover Request Acknowledge message to the source MN.

[0196] Specifically, the handover request message includes a radio resource control (RRC) reconfiguration message sent to the UE to perform conditional handover. In the CHO process with a candidate SCG, the RRC reconfiguration message sent by the candidate MN to the source MN also includes the configuration of the candidate PSCell. The candidate MN can also indicate to the source MN the relevant parameters of the execution conditions of the candidate PSCell.

[0197] For example, the handover request confirmation message sent by candidate MN 1 to the source MN includes one or more condition configurations. Each condition configuration includes configuration information of the candidate PCell, execution conditions of the candidate PCell, and (optional) configuration information of the candidate PSCell and parameters related to the execution conditions of the (optional) candidate PSCell. Each condition configuration may correspond to an RRC reconfiguration message, and taking each condition configuration corresponding to a reconfiguration message as an example:

[0198] a: RRC reconfiguration message 1, which includes the configuration of candidate PCell 1 under candidate MN 1, and the configuration of PSCell 1 associated with PCell 1 (the configuration of PSCell 1 can be encapsulated in an RRC reconfiguration message 1-1, and RRC reconfiguration message 1-1 is encapsulated in RRC reconfiguration message 1), as well as optional parameters related to the execution conditions of PSCell 1 (such as the threshold of the triggering event, etc.).

[0199] b: RRC reconfiguration message 2, which includes the configuration of candidate PCell 2 under candidate MN 1, and the configuration of PSCell 2 associated with PCell 2 (the configuration of PSCell 2 can be encapsulated in an RRC reconfiguration message 2-1, and RRC reconfiguration message 2-1 is encapsulated in RRC reconfiguration message 2), as well as optional parameters related to the execution conditions of PSCell 2 (such as the threshold of the trigger event, etc.).

[0200] c: RRC reconfiguration message 3, which includes the configuration of candidate PCell 2 under candidate MN 1, and the configuration of PSCell 3 associated with PCell 2 (the configuration of PSCell 3 can be encapsulated in an RRC reconfiguration message 3-1, and RRC reconfiguration message 3-1 is encapsulated in RRC reconfiguration message 3), as well as optional parameters related to the execution conditions of PSCell 3 (such as the threshold of the triggering event, etc.).

[0201] d: RRC reconfiguration message 4, which includes the configuration of candidate PCell 3 under candidate MN1.

[0202] Subsequently, the source MN sends an Xn-U Address Indication message to the source SN, which notifies the source SN of the conditional switching, which may be used for early data forwarding, and sends an early status transfer message to the source MN.

[0203] Step S250, the source MN sends an RRC reconfiguration message to the UE, including a CHO configuration (i.e., a series of RRC reconfiguration messages* and associated execution conditions). The RRC reconfiguration message* is received by the source MN from the corresponding candidate MN. Each RRC reconfiguration message* may include an MCG configuration and (optionally) an SCG configuration. The SCG configuration is received by the candidate MN from the candidate SN. The execution conditions associated with each RRC reconfiguration message* include an execution condition for a candidate PCell and an execution condition for a candidate PSCell. Each RRC reconfiguration message* is associated with a conditional configuration ID. The conditional configuration ID is used to identify a conditional configuration.

[0204] Combine the following Figure 3 A detailed description of the RRC reconfiguration message sent by the source MN to the UE is given. Figure 3 A configuration framework diagram of a CHO with a candidate SCG provided in an embodiment of the present application.

[0205] like Figure 3 As shown, the RRC reconfiguration message includes a conditional configuration list and other configurations other than the conditional configuration, wherein the RRC reconfiguration message specifically includes:

[0206] like Figure 3As shown, the RRC reconfiguration message includes a conditional configuration list and other configurations other than the conditional configuration, wherein the conditional configuration list may specifically include:

[0207] a: Conditional configuration 1, which includes: conditional configuration identifier ID1, configuration information 1 (which may also be RRC reconfiguration message 1), and the configuration information 1 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, the conditional configuration 1 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 1.

[0208] b: Conditional configuration 2, which includes: conditional configuration identifier ID2, configuration information 2 (which may also be RRC reconfiguration message 2), and the configuration information 2 includes the configuration information of candidate PCell 2 under candidate MN 1, and the configuration information of candidate PSCell 2 associated with candidate PCell 2. In addition, the conditional configuration 2 also includes the execution conditions of candidate PCell 2 and the execution conditions of candidate PSCell 2.

[0209] c: Conditional configuration 3, which includes: conditional configuration identifier ID3, configuration information 3 (which may also be RRC reconfiguration message 3), which includes the configuration information of candidate PCell 2 under candidate MN 1, and the configuration information of candidate PSCell 3 associated with candidate PCell 2. In addition, the conditional configuration 3 also includes the execution condition of candidate PCell 2.

[0210] It should be noted that the candidate PCell 1 in conditional configuration 1 corresponds to MCG configuration 1, the candidate PCell 1 in conditional configuration 2 corresponds to MCG configuration 2, and the candidate PCell 1 in conditional configuration 3 corresponds to MCG configuration 3. Among them, MCG configuration 1, MCG configuration 2 and MCG configuration 3 can be the same or different. That is, the MCG configurations (or PCell configurations) in different conditional configurations including the same PCell can be the same or different. The following description is also applicable and will not be repeated later.

[0211] d: Condition configuration 4, which includes: condition configuration identifier ID4, configuration information 4 (which may also be RRC reconfiguration message 4), and the configuration information 4 includes the configuration information of candidate PCell 3 under candidate MN 1. In addition, the condition configuration 4 also includes the execution condition of candidate PCell 3.

[0212] It should be noted that candidate PCell 3 in conditional configuration 4 corresponds to MCG configuration 4.

[0213] e: Conditional configuration 5, which includes: conditional configuration identifier ID5, configuration information 5 (which may also be RRC reconfiguration message 5), and the configuration information 5 includes the configuration information of candidate PCell 4 under candidate MN 2, and the configuration information of candidate PSCell 1 associated with candidate PCell 4. In addition, the conditional configuration 5 also includes the execution conditions of candidate PCell 4 and the execution conditions of candidate PSCell 1.

[0214] It should be noted that candidate PCell 4 in conditional configuration 5 corresponds to MCG configuration 5.

[0215] f: Conditional configuration 6, which includes: conditional configuration identifier ID6, configuration information 6 (which can also be RRC reconfiguration message 6), which includes the configuration information of candidate PCell 4 under candidate MN2, the configuration information of candidate PSCell 4 associated with candidate PCell 4, and the execution condition of candidate PCell 4.

[0216] It should be noted that candidate PCell 4 in conditional configuration 6 corresponds to MCG configuration 6.

[0217] Step S260: The UE replies an RRC reconfiguration completion message to the source MN.

[0218] It should be noted that the specific description of step S260 can be referred to the existing protocol and will not be repeated here.

[0219] Step S270: The UE continues to maintain the connection with the source MN and the connection with the source SN (if the UE is configured with a PSCell), and after receiving the CHO configuration, starts to evaluate the execution conditions of the candidate PCell and the execution conditions of the candidate PSCell.

[0220] If at least one candidate PCell satisfies its corresponding execution condition, and the candidate PSCell associated with the PCell satisfies the execution condition corresponding to the PSCell, the UE disconnects from the source MN and performs a synchronization process to the candidate PCell using the stored configuration of the selected PCell and the associated PSCell.

[0221] Step S280: The UE sends an RRC reconfiguration complete message to the candidate MN where the selected candidate PCell is located.

[0222] The RRC reconfiguration complete message includes an SN reconfiguration complete message sent to the selected PSCell.

[0223] Step S290: The UE performs a synchronization process with the (target) SN where the selected candidate PSCell is located.

[0224] Step S2100: If the RRC connection reconfiguration process is successful, the target MN informs the (target) SN via an SN reconfiguration completion message.

[0225] Step S2110: The target MN sends a handover success message to the source MN, notifying the source MN that the UE has successfully accessed the target cell.

[0226] Step S2120a: The source MN sends an SN release request message to the source SN.

[0227] Step S2120b: The source SN responds to the release request.

[0228] Step S2120c: The source MN sends an XN-U addressing indication message to the source SN to transmit data forwarding information.

[0229] Step S2120d: The source MN sends a handover cancel message to other signaling connections or other candidate MNs.

[0230] Step S2120e: If the target MN is configured with other candidate PCells associated with other candidate SNs except the target SN, the target MN sends an SN release request message to the corresponding candidate SN. Other candidate MNs send SN release request messages to other candidate SNs.

[0231] Step S2120f, other candidate SNs respond to the release request.

[0232] Step S2130, executing data forwarding and path switching process.

[0233] It should be noted that there is no restriction on the execution order of S280 and S290. For the specific description of steps S280-S290, please refer to the existing protocol and will not be repeated here.

[0234] At present, in the CHO process with candidate SCG, the conditional configuration ID (or configuration identifier) ​​is allocated by the source MN. Specifically, the source MN obtains the configuration information sent by multiple candidate MNs, and uniformly allocates a conditional configuration ID for each configuration information, and sends it to the UE together with the conditional configuration. Therefore, when the target MN receives the conditional configuration ID of the selected configuration information sent by the UE, it cannot identify the configuration information referred to by the conditional configuration ID, as well as the configuration information of the primary cell PCell and / or the configuration information of the primary and secondary cells PSCell associated with the configuration information.

[0235] Furthermore, the target MN will be unable to determine the selected target SN and the master cell group (MCG) configuration required for the UE to communicate.

[0236] In view of this, the present application aims to provide a communication method, which enables the target MN to identify the configuration information selected by the UE, and further enables the target MN to determine the selected target SN and the MCG configuration required for UE communication.

[0237] It should be noted that the conditional configuration described above can also be understood as the configuration information described below.

[0238] Figure 4 A schematic flow chart of a communication method 400 provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the method includes at least the following steps.

[0239] S410: The second network device sends M pieces of second configuration information to the first network device. Correspondingly, the first network device receives the M pieces of second configuration information.

[0240] Exemplarily, the second network device may be a candidate MN or a target MN, and the first network configuration may be a source MN. It can be understood that there may be one or more second network devices.

[0241] Specifically, in S410, each of the M second configuration information includes configuration information of a primary cell served by the second network device and a first identifier, where the first identifier is used to identify one of the M second configuration information.

[0242] It can be understood that the configuration information of the primary cell can be replaced by the MCG configuration information.

[0243] The first identifier is used to identify one piece of configuration information among the M pieces of second configuration information, which can be understood as having the following two implementation methods.

[0244] Exemplarily, the first identifier is used as ID for description.

[0245] Implementation method 1:

[0246] The first identifier is used to identify a configuration information in the configuration information of the primary cell served by the second network device. That is, the second network device allocates the first identifier in the configuration information associated with the primary cell of the network device. For example:

[0247] ID1 is used to identify the second configuration information (configuration information 1) associated with PCell 1 and PSCell 1;

[0248] ID2 is used to identify the second configuration information (configuration information 2) associated with PCell 1 and PSCell 2;

[0249] ID3 is used to identify the second configuration information (configuration information 3) associated with PCell 2 and PSCell 3;

[0250] ID4 is used to identify the second configuration information (configuration information 4) associated with PCell 2.

[0251] Implementation method 2:

[0252] The first identifier is used to identify one of the configuration information of the same primary cell served by the second network device. That is, the second network device allocates the first identifier in the configuration information associated with the same primary cell under the network device. It can be understood that the first identifiers of the configuration information associated with the same primary cell in the M second configuration information are different. For example:

[0253] ID1 is used to identify the second configuration information (configuration information 1) associated with PCell 1 and PSCell 1;

[0254] ID2 is used to identify the second configuration information (configuration information 2) associated with PCell 1 and PSCell 2;

[0255] ID1 is used to identify the second configuration information (configuration information 3) associated with PCell 2 and PSCell 3;

[0256] ID2 is used to identify the second configuration information (configuration information 4) associated with PCell 2.

[0257] The second configuration information (configuration information) associated with the PCell and the PSCell can be understood as including the configuration information of the PCell and the configuration information of the PSCell. For example, the second configuration information (configuration information 1) associated with the PCell1 and the PSCell1 can be understood as including the configuration information of the PCell1 and the configuration information of the PSCell1.

[0258] It needs to be explained that, compared with implementation method 1, implementation method 2 uses fewer values ​​of the first identifier, which can save signaling overhead.

[0259] Optionally, the second configuration information may also include configuration information of primary and secondary cells associated with the primary cell. It is understandable that the configuration information of the primary and secondary cells may be replaced by the configuration information of the SCG.

[0260] Optionally, the second configuration information may further include configuration information of a primary and secondary cell associated with the primary cell, and an execution condition of the primary and secondary cell association.

[0261] S420, the first network device sends N first configuration information to the terminal device, and correspondingly, the terminal device receives the N first configuration information sent by the first network device.

[0262] Specifically, in S420, each of the N first configuration information includes configuration information of the primary cell, an execution condition for switching to the primary cell, and a first identifier. The N first configuration information includes M first configuration information associated with the primary cell served by the second network device, where N and M are positive integers, and N is greater than or equal to M.

[0263] It should be noted that, before S420, the method may further include, the fourth network device sends O second configuration information to the first network device, and accordingly, the first network device receives the O second configuration information. Each of the O second configuration information includes configuration information of the primary cell served by the fourth network device and a first identifier, wherein the first identifier is used to identify one of the O second configuration information.

[0264] It should be understood that the first identifier is used to identify one configuration information among the O second configuration information. The implementation method described above can be referred to and will not be repeated here.

[0265] It should also be understood that the fourth network device may be one or more network devices, and the fourth network device is described as one network device below.

[0266] The first network device receives the second configuration information sent by one or more second network devices (or fourth network devices), and obtains the configuration information of the primary cell and the related first identifier therefrom. The first network configuration can determine the execution condition of the primary cell, and is included in the first configuration information together with the configuration information of the primary cell received from the second network device (or fourth network device) and the related first identifier, and is sent to the terminal device.

[0267] Exemplarily, the second network device may be candidate MN1, the fourth network device may be candidate MN2, the first network device receives M second configuration information and O second configuration information respectively sent from candidate MN1 and candidate MN2, and accordingly, the first network device receives (M+O) second configuration information.

[0268] Subsequently, in S420, the first network device sends N first configuration information to the terminal device. At this time, N can be understood as (M+O). That is, the N first configuration information includes: M first configuration information associated with the candidate MN1 (the second network device), and O first configuration information associated with the candidate MN2 (the fourth network device).

[0269] For example, take M=4, O=2, and N=6.

[0270] Specifically, candidate MN1 sends 4 second configuration information to the first network device, and candidate MN2 sends 2 second configuration information to the first network device. Then, after receiving the 6 second configuration information, the first network device sends 6 first configuration information to the terminal device.

[0271] It should be understood that the above numerical values ​​are only for illustration and the present application does not impose any limitation thereto.

[0272] Optionally, in a possible implementation, one or more of the N first configuration information also includes configuration information of primary and secondary cells associated with the primary cell. If the second configuration information received by the first network device from the second network device (or the fourth network device) includes configuration information of the primary and secondary cells, the first network identifies that the configuration information of the primary and secondary cells is included in the determined first configuration information, and sends it to the terminal device.

[0273] Optionally, in a possible implementation, one or more configuration information of the N first configuration information also includes configuration information of primary and secondary cells associated with the primary cell and execution conditions of the primary and secondary cells. If the second configuration information received by the first network device from the second network device (or the fourth network device) includes configuration information of the primary and secondary cells and execution conditions of the primary and secondary cells, the first network identifies that the configuration information of the primary and secondary cells and execution conditions of the primary and secondary cells are included in the determined first configuration information, and sends it to the terminal device.

[0274] Optionally, in a possible implementation, the first configuration information further includes a second identifier, and the second identifier is used to identify one configuration information in the N first configuration information. The first network device allocates the second identifier in the N first configuration information. That is, the second identifier of each first configuration information is different.

[0275] Exemplarily, N=6 is taken as an example below, assuming that the primary cell served by the second network device is a PCell1, and the first configuration information (configuration information #1-#6) in this application is introduced in detail.

[0276] a: Configuration information #1, including: a first identifier (ID1), a second identifier (or conditional configuration ID1), and RRC reconfiguration message 1, which includes the configuration information of candidate PCell 1 under candidate MN 1 and the configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, the configuration information 1 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 1.

[0277] b: Configuration information #2, including: a first identifier (ID2), a second identifier (or conditional configuration ID2), and RRC reconfiguration message 2, which includes the configuration information of candidate PCell 1 under candidate MN 1 and the configuration information of candidate PSCell 2 associated with candidate PCell 1. In addition, the configuration information 2 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 2.

[0278] c: Configuration information #3, including: a first identifier (ID3), a second identifier (or conditional configuration ID3), and an RRC reconfiguration message 3, wherein the RRC reconfiguration message 3 includes the configuration information of the candidate PCell 1 under the candidate MN 1, and the configuration information of the candidate PSCell 2 associated with the candidate PCell 1. In addition, the conditional configuration 3 also includes the execution condition of the candidate PCell 1.

[0279] d: Configuration information #4, including: a first identifier (ID1), a second identifier (or conditional configuration ID4), and an RRC reconfiguration message 4, wherein the RRC reconfiguration message 4 includes the configuration information of the candidate PCell 2 under the candidate MN 2, and the configuration information of the candidate PSCell 3 associated with the candidate PCell 2. In addition, the configuration information 4 also includes the execution conditions of the candidate PCell 2 and the execution conditions of the candidate PSCell 3.

[0280] e: Configuration information #5, including: a first identifier (ID2), a second identifier (or conditional configuration ID5), and an RRC reconfiguration message 5, wherein the RRC reconfiguration message 5 includes the configuration information of the candidate PCell 2 under the candidate MN 2, and the configuration information of the candidate PSCell 4 associated with the candidate PCell 2. In addition, the configuration information #5 also includes the execution conditions of the candidate PCell 2 and the execution conditions of the candidate PSCell 4.

[0281] f: Configuration information #6, including: a first identifier (ID3), a second identifier (or called conditional configuration ID6), and an RRC reconfiguration message 6. The RRC reconfiguration message 6 includes the configuration information of the candidate PCell 2 under the candidate MN2, and the execution condition of the candidate PCell 2.

[0282] S430, the terminal device sends a first identifier of the configuration information selected by the terminal device to the second network device, and correspondingly, the second network device receives the first identifier of the configuration information selected by the terminal device.

[0283] Optionally, the first identifier is included in an RRC reconfiguration completion message.

[0284] After receiving the N first configuration information sent by the first network device, the terminal device starts to evaluate the execution conditions in the first configuration information. When the execution conditions of the primary cell are met and the execution conditions of the associated primary and secondary cells are met (when the primary and secondary cells and their associated execution conditions are configured), the terminal device selects the configuration information to perform the cell change. The configuration information can be referred to as the configuration information selected by the terminal device.

[0285] Optionally, the method may further include S440, the second network device determines the configuration information selected by the terminal device according to the received first identifier. The second network device may determine the configuration information of the PCell (or MCG configuration information) in the configuration information selected by the terminal device according to the first identifier sent by the terminal device.

[0286] Specifically, the terminal device sends the first identifier (for example, ID6) of the selected configuration information to the second network device. At this time, the second network device determines that the configuration information selected by the terminal device is configuration information #6 based on ID6 and the association between the first identifier and the configuration information (for example, the configuration information #1-#6 mentioned above) stored in the second network device.

[0287] Furthermore, the second network device determines the configuration information of PCell6 included in the configuration information #6.

[0288] In the case that one or more configuration information among the N first configuration information includes configuration information of primary and secondary cells, optionally, the method may also include: S450, the second network device determines the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device according to the first identifier sent by the terminal device.

[0289] The second network device may also determine the PSCell configuration information (or SCG configuration information) in the configuration information selected by the terminal device according to the first identifier sent by the terminal device, and further confirm the target SN selected by the terminal device. The second network device may forward the SN reconfiguration completion message received from the terminal device to the target SN.

[0290] Exemplarily, the second network device determines, based on the received first identifier, such as ID1, that the configuration information (configuration information #1) selected by the terminal device includes not only the configuration information of PCell1, but also the configuration information of PSCell1 associated with PCell1.

[0291] Further, the second network device determines a target SN where PSCell1 is located, for example, SN1. The second network device may forward the SN reconfiguration completion message received from the terminal device to SN1.

[0292] It should be understood that what the terminal device reports to the second network device is the first identifier corresponding to the selected configuration information, rather than the second identifier, because the second network device cannot identify the configuration information indicated by the second identifier.

[0293] Furthermore, in specific scenarios, for example, the same primary and secondary cells can be candidate PSCells of a CHO with a candidate SCG, and can also be default PSCells of a CHO with a default SCG. In this case, after the terminal device accesses, the target SN cannot identify the configuration information of the primary and secondary cells used by the terminal device. To solve this problem: Optionally, before S410, the method may further include: a third network device sends configuration information of P primary and secondary cells to a second network device, and accordingly, the second network device receives configuration information of P primary and secondary cells, wherein the P primary and secondary cells are primary and secondary cells of P third network devices, and P is a positive integer.

[0294] The third network device is a candidate SN, and there may be one or more third network devices.

[0295] Specifically, after receiving the configuration information of the P primary and secondary cells, the second network device sends M second configuration information to the first network device, and one or more configuration information of the M second configuration information includes the configuration information of the primary cell and the configuration information of the associated primary and secondary cells. One or more configuration information of the N first configuration information sent by the first network device includes the configuration information of the primary cell, the execution condition of the primary cell, the configuration information of the associated primary and secondary cells, and the first identifier.

[0296] Optionally, in a possible implementation, after receiving the configuration information of P primary and secondary cells, the second network device sends M second configuration information to the first network device, and one or more configuration information of the M second configuration information includes the configuration information of the primary cell and the configuration information of the associated primary and secondary cells, and the execution conditions of the primary and secondary cells. One or more first configuration information of the N first configuration information sent by the first network device includes the configuration information of the primary cell, the execution conditions of the primary cell and the configuration information of the associated primary and secondary cells, the execution conditions for switching to the primary and secondary cells, and the first identifier.

[0297] It should be understood that the N first configuration information include the execution conditions for switching to the primary and secondary cells, which can be understood as the condition for the terminal device to switch to the target base station of the configuration information is switched to the CHO with the candidate SCG; the N first configuration information does not include the configuration information of the execution conditions for switching to the primary and secondary cells, which can be understood as the condition for the terminal device to switch to the target base station is switched to the CHO of the default SCG.

[0298] Optionally, in a possible implementation, the method may further include: the terminal device sends first indication information to the second network device, where the first indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

[0299] Among them, the first indication information is used to indicate whether the configuration information selected by the terminal device includes the execution condition of the PSCell, which can be understood as the first indication information is used to indicate whether the configuration information of the terminal device is the configuration information of the CHO of the candidate SCG. Alternatively, the first indication information can also be understood as being used to indicate whether the change of the primary and secondary cells executed by the terminal device is conditional switching or non-conditional switching.

[0300] Specifically, in a possible implementation, the value of the first indication information is used to indicate whether the conditional switching of the terminal device is the CHO of the default SCG or the CHO with a candidate SCG.

[0301] Exemplarily, in a possible implementation manner, when the first indication information takes a first value, the first indication information indicates that the UE is a CHO with a candidate SCG.

[0302] Exemplarily, in a possible implementation manner, when the first indication information takes the second value, the first indication information indicates that the UE is the CHO of the default SCG.

[0303] Specifically, when the first indication information takes the first value (for example, 1), the UE is instructed to execute CHO with a candidate SCG. At this time, the target SN determines the configuration information selected by the UE according to the first indication information. The configuration information includes the configuration information of the primary cell (MCG configuration 1) and the configuration information of the primary and secondary cells (SCG configuration 1), as well as the execution conditions associated with the primary cell and the execution conditions associated with the primary and secondary cells.

[0304] When the first indication information takes the second value (for example, 0), the UE is instructed to execute the CHO of the default SCG. At this time, the target SN determines the configuration information selected by the UE based on the first indication information, where the configuration information includes the configuration information of the main cell (MCG configuration 2) and the configuration information of the main and secondary cells (SCG configuration 2), as well as the execution conditions associated with the main cell.

[0305] Among them, SCG configuration 1 and SCG configuration 2 can be the same or different.

[0306] Continue to see Figure 4The method may also include: the second network device sends second indication information to the third network device, and accordingly, the third network device receives the second indication information, wherein the second indication information is used to indicate the association relationship between the configuration information of P primary and secondary cells associated with the third network device and the first identifier, wherein P is a positive integer less than or equal to M.

[0307] Optionally, the method may further include: the second network device sends a first identifier of the configuration information selected by the terminal device to the third network device, and correspondingly, the third network device receives the first identifier of the configuration information selected by the terminal device.

[0308] Specifically, the second indication information indicates the following association relationship:

[0309] ID1 identifies the configuration information 1 of PSCell 1;

[0310] ID2 identifies configuration information 2 of PSCell 2;

[0311] ID3 identifies the configuration information 3 of PSCell 2;

[0312] ID4 identifies the configuration information 4 of PSCell 3.

[0313] Among them, configuration information 2 of PSCell 2 may be configuration information of PSCell 2 as a candidate PSCell, and configuration information 3 of PSCell 2 may be configuration information of PSCell 2 as a target PSCell.

[0314] The second indication information may indicate that the implementation method of the above association relationship may include:

[0315] Implementation method 1: the second indication information includes configuration information of P primary and secondary cells and P first identifiers, wherein the configuration information of the P primary and secondary cells corresponds to the P first identifiers one by one.

[0316] Implementation method 2: the second indication information includes P first identifiers, wherein the P first identifiers correspond one-to-one to the configuration information of the P primary and secondary cells sent by the third network device to the second network device.

[0317] At this time, the third network device determines that the configuration information selected by the terminal device includes the configuration information 2 of PSCell2 based on the received first identifier (e.g., ID2) and the association relationship indicated by the second indication information. The third network device can align the configuration information of the PSCell used by the terminal device during and after the terminal device accesses.

[0318] Optionally, in a possible implementation, the method may further include: the second network device sends a third indication message to the third network device, the third indication message being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. It is understandable that the content of the third indication message is the content of the first indication message indicated by the terminal device to the second network device.

[0319] Among them, the third indication information is used to indicate whether the configuration information selected by the terminal device includes the execution condition of the PSCell, which can be understood as the third indication information is used to indicate whether the configuration information of the terminal device is the configuration information of the CHO of the candidate SCG. The third indication information can also be understood as being used to indicate whether the change of the primary and secondary cells executed by the terminal device is conditional switching or non-conditional switching.

[0320] Specifically, in a possible implementation, the value of the third indication information is used to indicate whether the conditional switching of the terminal device is the CHO of the default SCG or the CHO with a candidate SCG.

[0321] Exemplarily, in a possible implementation manner, when the third indication information takes the first value, the third indication information indicates that the UE is a CHO with a candidate SCG.

[0322] Exemplarily, in a possible implementation manner, when the third indication information takes the second value, the third indication information indicates that the UE is the CHO of the default SCG.

[0323] Specifically, when the third indication information takes the first value (for example, 1), the UE is instructed to execute CHO with a candidate SCG. At this time, the target SN determines the configuration information selected by the UE according to the third indication information. The configuration information includes the configuration information of the primary cell (MCG configuration 1) and the configuration information of the primary and secondary cells (SCG configuration 1), as well as the execution conditions associated with the primary cell and the execution conditions associated with the primary and secondary cells.

[0324] When the third indication information takes the second value (for example, 0), the UE is instructed to execute the CHO of the default SCG. At this time, the target SN determines the configuration information selected by the UE based on the third indication information, where the configuration information includes the configuration information of the primary cell (MCG configuration 2) and the configuration information of the primary and secondary cells (SCG configuration 2), as well as the execution conditions associated with the primary cell.

[0325] Among them, SCG configuration 1 and SCG configuration 2 can be the same or different.

[0326] It should be understood that in this embodiment, in order to allow the second network device to successfully perform the access process with the terminal setting and successfully receive the first identifier of the configuration information selected by the terminal, this embodiment also includes: the first configuration of the network device in the configuration information containing the same primary cell is the same. The first configuration includes the configuration required for the terminal device to access the primary cell and send the first identifier to the primary cell. For example, the first configuration includes random access configuration (such as preamble configuration information, random access response configuration information, etc.) and physical uplink shared channel (physical uplink sharedchannel, PUSCH) configuration, etc.

[0327] The communication method provided by the present application is described in detail below in conjunction with specific embodiments.

[0328] Figure 5 A schematic flow chart of a communication method 500 provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the method includes at least the following steps.

[0329] S510: The source MN sends a handover request message to the candidate MN.

[0330] S520, the candidate MN sends an SN adding request message to the candidate SN to request the candidate SN to prepare resources.

[0331] S530, the candidate SN replies to the corresponding candidate MN with an SN addition request confirmation message. Optionally, the message includes configuration information of P primary and secondary cells. There can be one or more candidate SNs.

[0332] It should be noted that steps S510 to S530 may refer to existing protocols and will not be described in detail here.

[0333] S540: The candidate MN sends a handover request confirmation message to the source MN.

[0334] Specifically, the handover request confirmation message includes M second configuration information, and the second configuration information includes the first identifier and an RRC reconfiguration message*. The RRC reconfiguration message* includes the configuration information of the PCell, or the configuration information of the PCell and the configuration information of the PSCell associated with the PCell.

[0335] In addition, the second configuration information also includes relevant parameters of the execution conditions of the PSCell. It should be understood that the relevant parameters of the execution conditions of the PSCell may be, for example, a threshold of a triggering event (e.g., an RSRP threshold, an RSRP threshold), a signal type (SSB, CSI-RS), and a triggering event type, etc., which are not limited in this application.

[0336] It should be noted that, for a specific description of the first identifier and the second configuration information, reference may be made to step S410, which will not be repeated here.

[0337] Step S550: The source MN sends an RRC reconfiguration message to the UE, and correspondingly, the UE receives the RRC reconfiguration message.

[0338] Specifically, the RRC reconfiguration message includes N first configuration information, the first configuration information includes: a first identifier, a second identifier, and an RRC reconfiguration message* associated with the second identifier, the RRC reconfiguration message* includes the configuration information of the PCell and the configuration information of the PSCell associated with the PCell. In addition, the RRC reconfiguration message also includes the execution condition of the PCell, or the execution condition of the PCell and the execution condition of the PSCell.

[0339] It should be noted that, for the specific description of the first configuration information, please refer to the above S420, which will not be repeated here for the sake of simplicity.

[0340] It should also be noted that the first identification mentioned above can be a display indication or an implicit indication, and this application does not limit this. The following describes possible implementations of implicit indication in conjunction with specific examples.

[0341] Exemplarily, in a possible implementation, the first identifier of each first configuration information may be determined by the order of the second configuration information sent by the candidate MN to the source MN, or the order of the first configuration information in the RRC reconfiguration message sent by the source MN to the UE.

[0342] For example, the first identifier of the first first configuration information associated with PCell 1 is ID1, the first identifier of the second first configuration information associated with PCell 1 is ID2, and so on.

[0343] In the present application, the association relationship between the first identifier and the first configuration information is determined by an implicit indication method, which can save signaling overhead.

[0344] Step S560: The UE replies an RRC reconfiguration completion message to the source MN.

[0345] Steps S570-S580: The UE continues to maintain the connection with the source MN and the connection with the source SN (if the UE is configured with a PSCell), and after receiving the CHO configuration, begins to evaluate the execution conditions of the candidate PCell and the execution conditions of the candidate PSCell. When the conditional configuration (configuration information) that satisfies the execution conditions is detected, the UE performs a cell change.

[0346] It should be noted that the specific description of steps S560 to S580 can be referred to the existing protocol and will not be repeated here.

[0347] Step S590: The UE sends an RRC reconfiguration complete message to the target MN, and correspondingly, the target MN receives the RRC reconfiguration complete message.

[0348] It should be noted that for the specific description of the RRC reconfiguration completion message, reference may be made to the existing protocol. For the sake of simplicity, only the differences from the existing protocol are described below.

[0349] Specifically, the UE sends an RRC reconfiguration complete message to the candidate MN (or referred to as the target MN) where the selected candidate PCell is located. The RRC reconfiguration complete message includes an SN reconfiguration complete message and a first identifier of the configuration information selected by the UE.

[0350] Exemplarily, after the UE selects the configuration information #1 corresponding to PCell 1 and PSCell 1, an RRC reconfiguration complete message is sent to the candidate MN1 (target MN1) where PCell 1 is located, wherein the RRC reconfiguration message includes the first identifier ID1.

[0351] Then, after receiving the RRC reconfiguration completion message, the candidate MN1 determines, according to the first identifier ID1, that the configuration information selected by the UE is configuration information #1.

[0352] The configuration information #1 includes the configuration information of PCell 1 and the configuration information of PSCell 1. At this time, candidate MN1 determines that the target SN where PSCell 1 is located is SN1 according to the configuration information of PSCell1, and sends an SN reconfiguration complete message to SN1.

[0353] Furthermore, the candidate MN1 determines that the UE uses the MCG configuration (PCell1) for communication according to the configuration information of PCell1 and the configuration information of PSCell1.

[0354] Step S5100: When the RRC connection reconfiguration process is successful, the target MN sends an SN reconfiguration completion message to the target SN.

[0355] In step S5100, the target MN also sends the first identifier corresponding to the configuration information #1 selected by the UE, such as ID1, to the target SN. Accordingly, before the target MN sends the first identifier of the configuration information #1, the target MN also needs to send a second indication information to the target SN, and the second indication information indicates the correspondence between at least one first identifier ID and the configuration information of at least one primary and secondary cell.

[0356] It should be noted that the specific description of the second indication information in step S5100 can be found in the previous text and will not be repeated here for the sake of simplicity.

[0357] Optionally, in another possible implementation, the method may further include: the target MN sends third indication information to the target SN, where the third indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

[0358] It should be noted that for the specific description of the third indication information, please refer to the above description, and for the sake of simplicity, it will not be repeated here.

[0359] S5110, UE performs synchronization process.

[0360] It should be noted that step S5110 may refer to the existing protocol and will not be described in detail here.

[0361] According to the technical solution of the present application, the target MN can identify the configuration information selected by the UE, so that the target MN can determine the selected target SN and the MCG configuration required for UE communication. Furthermore, the target SN can also determine the configuration information selected by the UE, thereby determining the SCG configuration selected by the UE.

[0362] Figure 6 A schematic flow chart of a communication method 600 provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the method includes at least the following steps.

[0363] S610: The first network device sends first information to the second network device, and correspondingly, the second network device receives the first information.

[0364] S620: The first network device receives Q third configuration information sent by the second network device.

[0365] Specifically, the first information indicates K identifiers, where the K identifiers are available identifiers of one or more third configuration information associated with the second network device, where K is a positive integer.

[0366] Each of the Q third configuration information includes configuration information of the primary cell served by the second network device and a third identifier, the third identifier belongs to the K identifiers, and the third identifier is used to identify one of the configuration information in the third configuration information, wherein Q is a positive integer, and Q is less than or equal to K.

[0367] The first information indicates K identifiers, which can be understood as the first information being used to indicate the value range of the identifier that can be allocated by the second network device.

[0368] Specifically, the first information is used to indicate one or more of the following:

[0369] The maximum number of primary cells associated with the second network device;

[0370] The maximum number of primary and secondary cells associated with the primary cell associated with the second network device;

[0371] The maximum number of configuration information associated with the second network device;

[0372] the scope of the identification;

[0373] The starting value of the identifier.

[0374] Exemplarily, the first information is used to indicate the starting value of the identifier and the maximum number of configuration information associated with the second device. For example, the first information indicates that the starting value of the identifier is 0, and the maximum number of configuration information associated with the second device is 3, that is, the identifiers that the second network device can allocate to its configuration information include 0, 1, and 2.

[0375] Exemplarily, the first information is used to indicate the starting value of the identifier and the maximum number of primary cells associated with the second device. For example, the first information indicates that the starting value of the identifier is 0, and the maximum number of primary cells associated with the second device is 3, that is, the identifiers that the second network device can allocate for its configuration information include 0, 1, and 2.

[0376] Exemplarily, the first information is used to indicate the minimum and maximum values ​​of the identifier. For example, the first information indicates that the minimum value of the identifier is 0 and the maximum value is 2, that is, the identifiers that the second network device can allocate to its configuration information include 0, 1, and 2.

[0377] Among them, Q third identifiers belong to K identifiers, which can be understood as the first network device indicating K available identifiers to the second network device through the first information, and the second network device determines that the number of assignable identifiers is Q third identifiers based on the number of configuration information of the main cell it serves, which is Q.

[0378] It should be understood that the above description is only for illustration and the embodiments of the present application are not limited thereto.

[0379] It should be noted that, in S620, the second network device allocates Q third identifiers to the configuration information associated with the second network device, and sends the third configuration information to the first network device.

[0380] Optionally, in a possible implementation manner, one or more third configuration information among the Q third configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0381] Optionally, in a possible implementation, one or more of the Q third configuration information further include relevant parameters of the execution conditions for switching to the primary and secondary cells, such as a threshold of a triggering event, etc., which is not limited in this application.

[0382] Optionally, the method may further include: S630, the first network device sends at least one fourth configuration information to the terminal device, each fourth configuration information in the at least one fourth configuration information includes configuration information of a primary cell served by the second network device, a third identifier, and an execution condition for switching to the primary cell. It should be understood that the number of the at least one fourth configuration information should be greater than or equal to K.

[0383] Optionally, the fourth configuration information may also include configuration information of primary and secondary cells.

[0384] Optionally, the fourth configuration information may further include an execution condition for switching to the primary and secondary cells.

[0385] Exemplarily, N=4 is taken as an example below, assuming that the primary cells served by the second network device are PCell1 and PCell2, and the fourth configuration information (configuration information #1-#4) in this application is introduced in detail.

[0386] a: Configuration information #1, including: a third identifier (e.g., identifier 1), RRC reconfiguration message 1, the RRC reconfiguration message 1 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, the configuration information 1 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 1.

[0387] b: Configuration information #2, including: a third identifier (e.g., identifier 2), RRC reconfiguration message 2, the RRC reconfiguration message 2 including the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 2 associated with candidate PCell 1. In addition, the configuration information 2 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 2.

[0388] c: Configuration information #3, a third identifier (e.g., identifier 3), RRC reconfiguration message 3, the RRC reconfiguration message 3 includes the configuration information of candidate PCell 2 under candidate MN1, and the configuration information of candidate PSCell 3 associated with candidate PCell 2. In addition, the configuration information 3 also includes the execution conditions of candidate PCell 2 and the execution conditions of candidate PSCell 3.

[0389] d: Configuration information #4, including: a third identifier (eg, identifier 4), an RRC reconfiguration message 4, wherein the RRC reconfiguration message 4 includes configuration information of the candidate PCell 2 under the candidate MN1, and an execution condition of the candidate PCell 2.

[0390] It should be understood that the first network device should ensure that the available identification ranges allocated to different second network devices are different. Accordingly, the third identifications allocated to different second network devices are all different. For example, the two identifications allocated by the first network device to the candidate MN1 are 0 and 1 (K=2), and the four identifications allocated to the candidate MN2 are 2 to 5 (K=4).

[0391] S640: The second network device receives a third identifier of the configuration information selected by the terminal device and sent by the terminal device.

[0392] Optionally, the third identifier is included in an RRC reconfiguration completion message.

[0393] Optionally, the method may further include: the second network device determines the configuration information selected by the terminal device according to the third identifier received from the terminal device. The second network device may determine the configuration information of the PCell (or MCG configuration information) in the configuration information selected by the terminal device according to the third identifier sent by the terminal device.

[0394] Specifically, the terminal device sends a third identifier (e.g., identifier 4) of the selected configuration information to the second network device. At this time, the second network device determines that the configuration information selected by the terminal device is configuration information #4 based on identifier 4 and the association between the third identifier and the configuration information (e.g., the configuration information #1-#4 described above) stored in the second network device.

[0395] Furthermore, the second network device determines the configuration information of PCell2 included in the configuration information #4.

[0396] Optionally, one or more configuration information in at least one fourth configuration information includes configuration information of primary and secondary cells. At this time, the second network device determines the configuration information of the primary and secondary cells (or SCG configuration information) included in the configuration information selected by the terminal device according to the third identifier sent by the terminal device. The second network device can also further confirm the target SN selected by the terminal device. The second network device can forward the SN reconfiguration completion message received from the terminal device to the target SN.

[0397] Exemplarily, the second network device determines that the configuration information (configuration information #1) selected by the terminal device includes not only the configuration information of PCell1, but also the configuration information of PSCell1 associated with PCell1 according to the received third identifier, such as identifier 1.

[0398] Further, the second network device determines a target SN where PSCell1 is located, for example, SN1, and the second network device may forward the SN reconfiguration completion message received from the terminal device to SN1.

[0399] Optionally, in a possible implementation, the method may also include: the second network device sends fourth indication information to the third network device, and accordingly, the third network device receives the fourth indication information, wherein the fourth indication information is used to indicate the association relationship between the configuration information of X primary and secondary cells associated with the third network device and the third identifier, where X is a positive integer less than or equal to Q.

[0400] Optionally, the method may further include: the second network device sends a third identifier of the configuration information selected by the terminal device to the third network device, and correspondingly, the third network device receives the third identifier of the configuration information selected by the terminal device.

[0401] Specifically, the fourth indication information indicates the following association relationship:

[0402] Identifier 1 identifies configuration information 1 of PSCell 1;

[0403] Identifier 2 identifies configuration information 2 of PSCell 2;

[0404] Identifier 3 identifies configuration information 3 of PSCell 2;

[0405] Identifier 4 identifies configuration information 4 of PSCell 3.

[0406] Among them, configuration information 2 of PSCell 2 may be configuration information of PSCell 2 as a candidate PSCell, and configuration information 3 of PSCell 2 may be configuration information of PSCell 2 as a target PSCell.

[0407] The fourth indication information indicates that the implementation method of the above association relationship may include:

[0408] Implementation method 1: the fourth indication information includes configuration information of X primary and secondary cells and X third identifiers, wherein the configuration information of the X primary and secondary cells corresponds to the P third identifiers one by one.

[0409] Implementation method 2: the fourth indication information includes X first identifiers, wherein the X third identifiers correspond one-to-one to the configuration information of the X primary and secondary cells sent by the third network device to the second network device.

[0410] At this time, the third network device determines that the terminal device has selected the configuration information including PSCell1 based on the received third identifier (e.g., identifier 1) and the association relationship indicated by the second indication information, and determines the configuration information selected by the terminal device. The third network device can align the configuration information of the PSCell used by the terminal device during and after the terminal device accesses.

[0411] Optionally, in a possible implementation, the method may further include: the second network device sends fifth indication information to the third network device, the fifth indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. Optionally, the fifth indication information may be received by the second network device from the terminal device.

[0412] It should be noted that, for the specific description of the fifth indication information, reference may be made to the relevant description of the third indication information mentioned above, and for the sake of simplicity, it will not be repeated here.

[0413] It should be understood that in this embodiment, in order to enable the second network device to successfully perform the access process with the terminal setting, and successfully receive the third identifier of the configuration information selected by the terminal, this embodiment also includes: the network device is the same as the first configuration in the configuration information containing the same primary cell. The first configuration includes the configuration required for the terminal device to access the primary cell and send the third identifier to the primary cell. For example, the first configuration includes a random access configuration (such as preamble configuration information, random access response configuration information, etc.) and an uplink data shared channel (PUSCH) configuration, etc.

[0414] The communication method provided by the present application is described in detail below in conjunction with specific embodiments.

[0415] Figure 7 A schematic flow chart of a communication method 700 provided in an embodiment of the present application is shown as follows: Figure 7 As shown, the method may include at least the following steps.

[0416] S710: The source MN sends a handover request message to the candidate MN. Correspondingly, the candidate MN receives the handover request message sent by the source MN.

[0417] Specifically, in the handover request message, the source MN sends first information to at least one candidate MN, where the first information is used to indicate a value range of an identifier that can be allocated by the second network device.

[0418] It should be noted that the specific description of the first information indicating K identifiers can be found in the foregoing description, and for the sake of simplicity, it will not be repeated here.

[0419] S720, the candidate MN sends an SN adding request message to the candidate SN to request the candidate SN to prepare resources.

[0420] Optionally, in the SN adding request message, the candidate MN informs the candidate SN of Q third identifiers among the determined K identifiers.

[0421] Specifically, taking the above-mentioned example as an example, when the candidate MN determines that the values ​​of Q third identifiers are 0, 1 and 2, the candidate MN informs all candidate SNs of the values ​​of the third identifiers being 0, 1 and 2.

[0422] S730, the candidate SN replies to the candidate MN with an SN adding request confirmation message. Optionally, the SN adding request confirmation message may include configuration information of the X primary and secondary cells determined by the candidate SN.

[0423] It should be noted that the relevant description of step S730 can be found in the specific protocol and will not be repeated here.

[0424] S740, the candidate MN sends a handover request confirmation message to the source MN, and correspondingly, the source MN receives the handover request confirmation message sent by the candidate MN.

[0425] Specifically, in the handover request confirmation message, the candidate MN sends Q third configuration information to the source MN. The specific description of the third configuration information can be referred to above, which will not be repeated here.

[0426] Step S750: The source MN sends an RRC reconfiguration message to the UE, and correspondingly, the UE receives the RRC reconfiguration message.

[0427] Specifically, the RRC reconfiguration message includes at least one fourth configuration information, and the fourth configuration information includes: a third identifier and an RRC reconfiguration message* associated with the third identifier, and the RRC reconfiguration message* includes the configuration information of the PCell and the configuration information of the PSCell optionally associated with the PCell. In addition, the RRC reconfiguration message also includes the execution condition of the PCell, or the execution condition of the PCell and the execution condition of the PSCell.

[0428] It should be noted that, for the specific description of the fourth configuration information, please refer to the above, and for the sake of simplicity, it will not be repeated here.

[0429] Step S760: The UE replies an RRC reconfiguration completion message to the source MN.

[0430] Steps S770-S780: The UE continues to maintain the connection with the source MN and the connection with the source SN (if the UE is configured with a PSCell), and after receiving the CHO configuration, begins to evaluate the execution conditions of the candidate PCell and the execution conditions of the candidate PSCell.

[0431] It should be noted that the specific description of steps S760-S780 can be referred to the existing protocol and will not be repeated here.

[0432] S790, the UE sends an RRC reconfiguration complete message to the target MN, and correspondingly, the target MN receives the RRC reconfiguration complete message.

[0433] It should be noted that for the specific description of the RRC reconfiguration completion message, reference may be made to the existing protocol. For the sake of simplicity, only the differences from the existing protocol are described below.

[0434] Specifically, the UE sends an RRC reconfiguration complete message to the candidate MN (or referred to as the target MN) where the selected candidate PCell is located. The RRC reconfiguration complete message includes the SN reconfiguration complete message and the third identifier of the configuration information selected by the UE.

[0435] Optionally, the third identifier is included in an RRC reconfiguration completion message.

[0436] Optionally, the method may further include: the second network device determines the configuration information selected by the terminal device according to the third identifier received from the terminal device. The second network device may determine the configuration information of the PCell (or MCG configuration information) in the configuration information selected by the terminal device according to the third identifier sent by the terminal device.

[0437] Exemplarily, after the UE selects configuration information #1 corresponding to PCell 1, an RRC reconfiguration complete message is sent to the candidate MN1 (target MN1) where PCell 1 is located, wherein the RRC reconfiguration message includes identifier 1.

[0438] Then, after receiving the RRC reconfiguration complete message, the candidate MN1 determines that the configuration information selected by the UE is configuration information #1 according to the identifier 1. Moreover, the configuration information #1 includes the configuration information of PCell 1.

[0439] Optionally, in the case where one or more of the at least one fourth configuration information described in step S750 above includes configuration information of primary and secondary cells. At this time, the candidate MN1 determines the configuration information of the primary and secondary cells (or SCG configuration information) included in the configuration information selected by the UE according to the third identifier (e.g., identifier 1) sent by the UE.

[0440] Exemplarily, the configuration information #1 selected by the terminal device includes not only the configuration information of PCell 1, but also the configuration information of PSCell 1. At this time, candidate MN1 determines that the target SN where PSCell 1 is located is SN1 according to the configuration information of PSCell1, and forwards the SN reconfiguration complete message to SN1.

[0441] Furthermore, the candidate MN1 determines that the UE uses the MCG configuration (PCell1) for communication according to the configuration information of PCell1 and the configuration information of PSCell1.

[0442] It should be noted that in the above steps, the first network device should ensure that the available identification ranges allocated to different second network devices are different. Correspondingly, the third identifications allocated to different second network devices are all different. For example, the two identifications allocated by the first network device to the candidate MN1 are 0 and 1 (K=2), and the four identifications allocated to the candidate MN2 are 2 to 5 (K=4).

[0443] S7100: When the RRC connection reconfiguration process is successful, the target MN sends an SN reconfiguration completion message to the target SN.

[0444] Specifically, the target MN also sends a third identifier corresponding to the configuration information #1 selected by the UE, such as identifier 1, to the target SN. Accordingly, before the target MN sends the third identifier of the configuration information #1, the target MN also needs to send a fourth indication information to the target SN, and the fourth indication information indicates the association relationship between the configuration information of X primary and secondary cells associated with the third network device and the third identifier, where X is a positive integer less than or equal to Q.

[0445] It should be noted that for the specific description of the fourth indication information, please refer to the above description, and for the sake of simplicity, it will not be repeated here.

[0446] S7110, the UE performs a synchronization process to the target SN where the selected candidate primary and secondary cells are located.

[0447] For the description of step S7100, please refer to the existing protocol and will not be repeated here for the sake of simplicity.

[0448] According to the technical solution of the present application, the target MN can identify the configuration information selected by the UE, and further, the target MN can determine the selected target SN and the MCG configuration required for UE communication. Furthermore, the target SN can also determine the configuration information selected by the UE, thereby determining the SCG configuration selected by the UE.

[0449] Figure 8 A schematic flow chart of a communication method 800 provided in an embodiment of the present application is shown as follows: Figure 8 As shown, the method includes at least the following steps.

[0450] The communication method provided by the present application is described in detail below in conjunction with specific embodiments.

[0451] S810: The second network device obtains at least one fifth configuration information.

[0452] S820. The second network device sends at least one fifth configuration information to the first network device.

[0453] It is understandable that the second network device obtains at least one fifth configuration information and may also determine at least one fifth configuration information for the second network device.

[0454] Specifically, each fifth configuration information in the at least one fifth configuration information includes configuration information of the primary cell and access resource information of the primary cell, wherein different fifth configuration information includes different access resource information of the primary cell.

[0455] Among them, the access resource can be a random access resource, or a configured grant (CG) resource, or other uplink access resource. It should be understood that there is no limitation here.

[0456] It should be noted that the random access resource can be a public random access resource, for example, the terminal device uses the random access resource to perform a contention-based random access process; the random access resource can also be a dedicated random access resource, for example, the terminal device uses the random access resource to perform a non-contention-based random access process.

[0457] It should be noted that different fifth configuration information includes different access resource information of the primary cell, which can be understood as the fifth configuration information and the access resource information of the primary cell are associated, or it can be understood as that at least one fifth configuration information and the access resource information of at least one primary cell are mapped one-to-one, or it can be understood as that at least one fifth configuration information and the access resource information of at least one primary cell correspond one-to-one. It can also be understood that the access resource information of the primary cell can be used to identify different fifth configuration information.

[0458] Optionally, in a possible implementation manner, one or more fifth configuration information in the at least one fifth configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0459] Optionally, in a possible implementation manner, one or more fifth configuration information in the at least one fifth configuration information further includes parameters related to execution conditions for switching to the primary and secondary cells.

[0460] Exemplarily, assuming that the primary cell served by the second network device is PCell1, the fifth configuration information (configuration information #a-#c) in this application is introduced in detail.

[0461] a: Configuration information #a, including: access resource 1 information, RRC reconfiguration message 1, the RRC reconfiguration message 1 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1.

[0462] b: Configuration information #b, including: access resource 2 information, RRC reconfiguration message 2, the RRC reconfiguration message 2 includes the configuration information of candidate PCell 1 under candidate MN1, and the execution condition of candidate PCell 2.

[0463] c: Configuration information #c, including: access resource 3 information, RRC reconfiguration message 3, the RRC reconfiguration message 3 includes the configuration information of candidate PCell 1 under candidate MN 1, as well as the configuration information of candidate PSCell 1 associated with candidate PCell 1 and related parameters of the execution conditions of candidate PSCell 1.

[0464] Optionally, in a possible implementation manner, one or more fifth configuration information in the at least one fifth configuration information further includes parameters related to execution conditions for switching to the primary and secondary cells.

[0465] S830: The first network device sends at least one sixth configuration information to the terminal device.

[0466] Specifically, the sixth configuration information includes configuration information of the primary cell, execution conditions for switching to the primary cell, and access resource information of the primary cell, wherein different sixth configuration information includes different access resource information of the primary cell.

[0467] It should be noted that different sixth configuration information includes different access resource information of the primary cell, which can be understood as the association between the sixth configuration information and the access resource information of the primary cell, or it can be understood as one-to-one mapping of at least one sixth configuration information and at least one access resource information of the primary cell, or it can be understood as one-to-one correspondence between at least one sixth configuration information and at least one access resource information of the primary cell. It can also be understood that the access resource information of the primary cell can be used to identify different sixth configuration information.

[0468] Optionally, in a possible implementation manner, one or more sixth configuration information in the at least one sixth configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0469] Optionally, in a possible implementation manner, one or more sixth configuration information in the at least one sixth configuration information further includes an execution condition for switching to a primary or secondary cell.

[0470] Exemplarily, assuming that the primary cells served by the second network device are PCell1 and PCell2, and taking the access resource as a physical random access channel (PRACH) resource as an example, the sixth configuration information (configuration information #A-#D) in this application is introduced in detail.

[0471] a: Configuration information #A, including: PRACH1 information, RRC reconfiguration message 1, the RRC reconfiguration message 1 includes the configuration information of candidate PCell 1 under candidate MN1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, the configuration information 1 also includes the execution conditions of candidate PCell 1 and candidate PSCell 1.

[0472] b: Configuration information #B, including: PRACH2 information, RRC reconfiguration message 2, the RRC reconfiguration message 2 includes the configuration information of candidate PCell 1 under candidate MN1, and the configuration information of candidate PSCell 2 associated with candidate PCell 1. In addition, the configuration information 2 also includes the execution conditions of candidate PCell 1 and candidate PSCell 2.

[0473] c: Configuration information #C, including: PRACH3 information, RRC reconfiguration message 3, the RRC reconfiguration message 3 includes the configuration information of candidate PCell 2 under candidate MN1, and the configuration information of candidate PSCell 3 associated with candidate PCell 2. In addition, the configuration information 3 also includes the execution conditions of candidate PCell 2 and candidate PSCell 3.

[0474] d: Configuration information #D, including: PRACH4 information, RRC reconfiguration message 4, the RRC reconfiguration message 4 includes the configuration information of candidate PCell 2 under candidate MN1, and the execution condition of candidate PCell 2.

[0475] S840: The second network device receives an access request sent by the terminal device on the first access resource.

[0476] S850: The second network device determines the configuration information selected by the terminal device according to the first access resource.

[0477] Specifically, the access request may be a preamble 1, and the access resource may be a PRACH.

[0478] The access resource is PRACH, which includes that the access resource may be RO in the time-frequency domain or preamble resource in the code domain. The access request may also be other uplink messages (such as RRC messages), and the access resource may be CG resource.

[0479] Optionally, the method may further include, the second network device determining configuration information selected by the terminal device according to the first access resource.

[0480] Exemplarily, the second network device receives a preamble on a first access resource (eg, PRACH1). The second network device determines, based on PRACH1 of the received preamble, that the configuration information selected by the terminal device is configuration information #A.

[0481] Optionally, the method may further include, the second network device determining, based on the first access resource, configuration information of a primary cell included in the configuration information selected by the terminal device.

[0482] Specifically, the terminal device sends an access request to the second network device on the first access resource (e.g., PRACH4). At this time, the second network device determines that the configuration information selected by the terminal device is configuration information #D based on the access request (preamble4) received on PRACH4 and the association between the access resources and configuration information (e.g., the configuration information #A-#D mentioned above) stored in the second network device.

[0483] Furthermore, the second network device determines the configuration information of PCell2 included in the configuration information #D.

[0484] In the case that one or more configuration information in the at least one sixth configuration information includes configuration information of primary and secondary cells, optionally, the method may also include: the second network device determines the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device based on receiving the access request sent by the terminal device on the first access resource.

[0485] Optionally, the second network device may determine the target SN of the configuration information selected by the terminal device based on an access request sent by the terminal device received on the first access resource.

[0486] Exemplarily, the second network device receives an access request sent by the terminal device on the first access resource (eg, PRACH1), preamble1, and determines that the configuration information (configuration information #A) selected by the terminal device includes not only the configuration information of PCell1, but also the configuration information of PSCell1 associated with PCell1.

[0487] Further, the second network device determines a target SN where PSCell1 is located, for example, SN1, and the second network device may forward the SN reconfiguration completion message received from the terminal device to SN1.

[0488] Optionally, in a possible implementation, the method may further include: the second network device sends sixth indication information to the third network device, the sixth indication information being used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. The second network device may determine the configuration information selected by the terminal device based on the first access resource for sending the access request by the terminal device, and send the sixth indication information to the third network device, indicating whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

[0489] Optionally, in a possible implementation manner, the method may further include: the second network device receives sixth indication information from the terminal device, and forwards the sixth indication information to the third network device.

[0490] It should be noted that, for the specific description of the sixth indication information, reference may be made to the relevant description of the third indication information mentioned above, and for the sake of simplicity, it will not be repeated here.

[0491] Compared with other embodiments of the present application, the advantage of this embodiment is that there is no need to constrain the first configuration in the configuration information of the same primary cell to be the same. This is because the second network device can determine the configuration information selected by the terminal device through the access resource information at the beginning of the access process or in the first uplink access message between the terminal device and the second network device, and further determine the MCG configuration in the configuration information for subsequent transmission including the access process and sending the RRC reconfiguration completion message.

[0492] Fig. 9 A schematic flow chart of a communication method 900 provided in an embodiment of the present application is shown as follows: Fig. 9 As shown, the method includes at least the following steps.

[0493] S910: The source MN sends a handover request message to the candidate MN.

[0494] S920, the candidate MN sends an SN adding request message to the candidate SN to request the candidate SN to prepare resources.

[0495] S930: The candidate SN replies with an SN adding request confirmation message to the corresponding candidate MN.

[0496] It should be noted that steps S910 to S930 may refer to existing protocols and will not be described in detail here.

[0497] S940, the candidate MN sends a handover request confirmation message to the source MN, and correspondingly, the source MN receives the handover request confirmation message sent by the candidate MN.

[0498] Specifically, in the handover request confirmation message, the candidate MN sends at least one fifth configuration information to the source MN, and correspondingly, the source MN receives at least one fifth configuration information.

[0499] It should be noted that for the description of the fifth configuration information, please refer to S810-S820 above, which will not be repeated here for the sake of simplicity.

[0500] Step S950: The source MN sends an RRC reconfiguration message to the UE, and correspondingly, the UE receives the RRC reconfiguration message.

[0501] Specifically, the RRC reconfiguration message includes at least one sixth configuration information, and the sixth configuration information includes: access resources of the primary cell and an RRC reconfiguration message* associated with the access resources of the primary cell, and the RRC reconfiguration message* includes configuration information of the PCell and configuration information of the PSCell associated with the PCell. In addition, the RRC reconfiguration message also includes an execution condition of the PCell, or an execution condition of the PCell and an execution condition of the PSCell.

[0502] It should be noted that the specific description of the sixth configuration information can be found in the foregoing text, and for the sake of simplicity, it will not be repeated here.

[0503] Step S960: The UE replies an RRC reconfiguration completion message to the source MN.

[0504] Step S970: The UE continues to maintain the connection with the source MN and the connection with the source SN (if the UE is configured with a PSCell), and after receiving the CHO configuration, starts to evaluate the execution conditions of the candidate PCell and the execution conditions of the candidate PSCell.

[0505] It should be noted that steps S950-S970 can refer to the existing protocol and will not be described in detail here.

[0506] Step S980: If at least one candidate PCell satisfies its corresponding execution condition, and the candidate PSCell associated with the PCell satisfies the execution condition corresponding to the PSCell, the UE disconnects from the source MN and uses the stored configuration of the selected PCell and the associated PSCell. The UE uses the PRACH resources corresponding to the selected condition configuration to perform the synchronization process to the candidate PCell.

[0507] Exemplarily, the UE selects PRACH resource 1 corresponding to configuration information #A to perform a synchronization process towards PCell1.

[0508] Step S990: The UE sends an RRC reconfiguration complete message to the target MN, and correspondingly, the target MN receives the RRC reconfiguration complete message.

[0509] It should be noted that for the specific description of the RRC reconfiguration completion message, reference may be made to the existing protocol. For the sake of simplicity, only the differences from the existing protocol are described below.

[0510] The method may further include: S991, the UE sends an access request to the target MN on the first access resource, and accordingly, the target MN receives the access request. S992, the target MN determines the configuration information selected by the terminal device according to the first access resource.

[0511] It should be noted that steps S991-S992 are similar to steps S840-S850 and are not described in detail here for the sake of simplicity.

[0512] S9100: When the RRC connection reconfiguration process is successful, the target MN sends an SN reconfiguration completion message to the target SN.

[0513] In S9100 , the target MN may forward the SN reconfiguration complete message received from the UE to SN1 .

[0514] Optionally, in a possible implementation, the method may further include: the target MN sends a sixth indication message to the target SN, where the sixth indication message is used to indicate whether the configuration information selected by the UE includes an execution condition for switching to the primary and secondary cells. The target MN may determine the configuration information selected by the UE based on the first access resource for which the UE sends an access request, and send the sixth indication message to the target SN, indicating whether the configuration information selected by the UE includes an execution condition for switching to the primary and secondary cells.

[0515] S9110, the UE performs a synchronization process to the target SN where the selected candidate primary and secondary cells are located.

[0516] It should be noted that step S9110 may refer to the existing protocol and will not be described in detail here.

[0517] According to the technical solution of the present application, the target MN can identify the configuration information selected by the UE, and further, the target MN can determine the selected target SN and the MCG configuration required for UE communication.

[0518] Fig.10 A schematic flow chart of a communication method 1000 provided in an embodiment of the present application is shown in FIG. Fig.10 As shown, the method includes at least the following steps.

[0519] The communication method provided by the present application is described in detail below in conjunction with specific embodiments.

[0520] S1010. The second network device sends at least one seventh configuration information to the first network device.

[0521] Specifically, each seventh configuration information in the at least one seventh configuration information includes configuration information of the primary cell and an RRC processing identifier, wherein different seventh configuration information includes different RRC processing identifiers.

[0522] It should be noted that the RRC processing identifier is used to identify an RRC process. Specifically, the RRC processing identifier can identify an RRC process together with the message type.

[0523] Optionally, the RRC processing identifier is included in the RRC reconfiguration complete message.

[0524] It should be noted that different seventh configuration information includes different RRC processing identifiers, which can be understood as the seventh configuration information and the RRC processing identifier are associated, or it can be understood as at least one seventh configuration information and at least one RRC processing identifier are mapped one-to-one, or it can be understood as at least one seventh configuration information and at least one RRC processing identifier correspond one-to-one. It can also be understood that the RRC processing identifier can be used to identify different seventh configuration information.

[0525] Optionally, in a possible implementation manner, one or more seventh configuration information in the at least one seventh configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0526] Optionally, in a possible implementation manner, one or more seventh configuration information in the at least one seventh configuration information further includes parameters related to execution conditions of switching to the primary and secondary cells.

[0527] Exemplarily, assuming that the primary cell served by the second network device is PCell1, the seventh configuration information (configuration information #a-#c) in this application is introduced in detail.

[0528] a: Configuration information #a, including: RRC processing identifier 1, RRC reconfiguration message 1, and the RRC reconfiguration message 1 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1.

[0529] b: Configuration information #b, including: RRC processing identifier 2, RRC reconfiguration message 2, and the RRC reconfiguration message 2 includes the configuration information of candidate PCell 1 under candidate MN1, and the execution condition of candidate PCell 2.

[0530] c: Configuration information #c, including: RRC processing identifier 3, RRC reconfiguration message 3, the RRC reconfiguration message 3 includes the configuration information of candidate PCell 1 under candidate MN 1, as well as the configuration information of candidate PSCell 1 associated with candidate PCell 1 and related parameters of the execution conditions of candidate PSCell 1.

[0531] S1020. The first network device sends at least one eighth configuration information to the terminal device.

[0532] Specifically, the eighth configuration information includes configuration information of the primary cell, execution conditions for switching to the primary cell, and an RRC processing identifier, wherein different eighth configuration information includes different RRC processing identifiers.

[0533] It should be noted that different eighth configuration information includes different RRC processing identifiers, which can be understood as the association between the eighth configuration information and the RRC processing identifier, or, it can be understood as one-to-one mapping of at least one eighth configuration information and at least one RRC processing identifier, or, it can be understood as one-to-one correspondence between at least one eighth configuration information and at least one RRC processing identifier. It can also be understood that the RRC processing identifier can be used to identify different eighth configuration information.

[0534] Optionally, in a possible implementation manner, one or more eighth configuration information in the at least one eighth configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0535] Optionally, in a possible implementation manner, one or more eighth configuration information in the at least one eighth configuration information further includes an execution condition for switching to a primary or secondary cell.

[0536] Exemplarily, assuming that the primary cells served by the second network device are PCell1 and PCell2, the eighth configuration information (configuration information #A-#D) in the present application is introduced in detail.

[0537] a: Configuration information #A, including: RRC processing identifier 1, RRC reconfiguration message 1, the RRC reconfiguration message 1 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, the configuration information 1 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 1.

[0538] b: Configuration information #B, including: RRC processing identifier 2, RRC reconfiguration message 2, the RRC reconfiguration message 2 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 2 associated with candidate PCell 1. In addition, the configuration information 2 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 2.

[0539] c: Configuration information #C, including: RRC processing identifier 3, RRC reconfiguration message 3, the RRC reconfiguration message 3 includes the configuration information of candidate PCell 2 under candidate MN1, and the configuration information of candidate PSCell 3 associated with candidate PCell 2. In addition, the configuration information 3 also includes the execution conditions of candidate PCell 2 and candidate PSCell 3.

[0540] d: Configuration information #D, including: RRC processing identifier 4, RRC reconfiguration message 4, the RRC reconfiguration message 4 includes the configuration information of candidate PCell 2 under candidate MN1, and the execution condition of candidate PCell 2.

[0541] S1030: The terminal device sends second information to the second network device.

[0542] S1040: The second network device determines the configuration information selected by the terminal device according to the second information, wherein the second information is an RRC processing identifier of the configuration information selected by the terminal device.

[0543] Optionally, the method may further include: the second network device determining the configuration information selected by the terminal device according to the second information.

[0544] Exemplarily, the terminal device sends an RRC processing identifier (eg, RRC processing identifier 2) of the selected configuration information to the second network device. At this time, the second network device determines, based on RRC processing identifier 2, that the configuration information selected by the terminal device is configuration information #B.

[0545] Specifically, in a possible implementation manner, the second network device determines, based on the second information, the configuration information of the primary cell included in the configuration information selected by the terminal device.

[0546] Exemplarily, the terminal device sends the RRC processing identifier (e.g., RRC processing identifier 4) of the selected configuration information to the second network device. At this time, the second network device determines that the configuration information selected by the terminal device is configuration information #D based on RRC processing identifier 4 and the association between the RRC processing identifier and the configuration information (e.g., the configuration information #A-#D described above) stored by the second network device.

[0547] Furthermore, the second network device determines the configuration information of PCell2 included in the configuration information #D.

[0548] Specifically, in a possible implementation, when one or more configuration information in the at least one eighth configuration information includes configuration information of primary and secondary cells, optionally, the method may also include: the second network device determines the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device according to the RRC processing identifier sent by the terminal device.

[0549] Exemplarily, the second network device determines, based on a received RRC processing identifier, such as RRC processing identifier 1, that the configuration information (configuration information #A) selected by the terminal device includes not only the configuration information of PCell1, but also the configuration information of PSCell1 associated with PCell1.

[0550] Optionally, the second network device may determine the target SN of the configuration information selected by the terminal device based on the received RRC processing identifier.

[0551] Exemplarily, the second network device determines a target SN where PSCell1 is located, such as SN1. The second network device may forward the SN reconfiguration completion message received from the terminal device to SN1.

[0552] Optionally, in a possible implementation, the method may further include: the second network device sends an eighth indication message to the third network device, where the eighth indication message is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. The second network device may receive an RRC processing identifier, determine the configuration information selected by the terminal device, and send the eighth indication message to the third network device, indicating whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

[0553] Optionally, in a possible implementation manner, the method may further include: the terminal device sends eighth indication information to the second network device, and the second network device forwards the eighth indication information to the third network device.

[0554] It should be noted that, for the specific description of the eighth indication information, reference may be made to the relevant description of the third indication information above, and for the sake of simplicity, it will not be repeated here.

[0555] It should be understood that in this embodiment, in order to allow the second network device to successfully perform the access process with the terminal setting, and successfully receive the RRC processing identifier of the configuration information selected by the terminal, this embodiment also includes: the network device has the same first configuration in the configuration information containing the same primary cell. The first configuration includes the configuration required for the terminal device to access the primary cell and send the RRC processing identifier to the primary cell. For example, the first configuration includes a random access configuration (such as preamble configuration information, random access response configuration information, etc.) and an uplink data shared channel (PUSCH) configuration, etc.

[0556] The communication method provided by the present application is described in detail below in conjunction with specific embodiments.

[0557] Fig.11 A schematic flow chart of a communication method 1100 provided in an embodiment of the present application is shown as follows: Fig.11 As shown, the method includes at least the following steps.

[0558] Step S1110: The source MN sends a handover request message to the candidate MN.

[0559] Step S1120: The candidate MN sends an SN adding request message to the candidate SN to request the candidate SN to prepare resources.

[0560] Step S1130: The candidate SN replies to the corresponding candidate MN with an SN adding request confirmation message.

[0561] It should be noted that steps S1110 to S1130 may refer to existing protocols and will not be described in detail here.

[0562] Step S1140: The candidate MN sends a handover request confirmation message to the source MN.

[0563] Specifically, in the handover request confirmation message, the candidate MN sends at least one seventh configuration information to the source M, and correspondingly, the source MN receives the at least one seventh configuration information.

[0564] It should be noted that for the description of the seventh configuration information, please refer to the previous S1010, which will not be repeated here for the sake of simplicity.

[0565] Step S1150: The source MN sends an RRC reconfiguration message to the UE, and correspondingly, the UE receives the RRC reconfiguration message.

[0566] In the RRC reconfiguration message, the source MN sends at least one eighth configuration information to the UE, and correspondingly, the UE receives the eighth configuration information.

[0567] It should be noted that for the description of the eighth configuration information, please refer to the previous S1020, which will not be repeated here for the sake of simplicity.

[0568] Step S1160: The UE replies an RRC reconfiguration completion message to the source MN.

[0569] Steps S1170-S1180, the UE continues to maintain the connection with the source MN and the connection with the source SN (if the UE is configured with a PSCell), and after receiving the CHO configuration, starts to evaluate the execution conditions of the candidate PCell and the execution conditions of the candidate PSCell.

[0570] It should be noted that the specific description of steps S1160-S1180 can be referred to the existing protocol and will not be repeated here.

[0571] Step S1190: The UE sends an RRC reconfiguration complete message to the target MN, and correspondingly, the target MN receives the RRC reconfiguration complete message.

[0572] It should be noted that for the specific description of the RRC reconfiguration completion message, reference may be made to the existing protocol. For the sake of simplicity, only the differences from the existing protocol are described below.

[0573] Specifically, the UE sends an RRC reconfiguration complete message to the candidate MN (or target MN) where the selected candidate PCell is located. The RRC reconfiguration complete message includes an SN reconfiguration complete message and an RRC processing identifier of the configuration information selected by the UE.

[0574] Exemplarily, after the UE selects the configuration information #A corresponding to PCell 1 and PSCell 1, an RRC reconfiguration complete message is sent to the candidate MN1 (target MN1) where PCell 1 is located, wherein the RRC reconfiguration message includes an RRC processing identifier 1.

[0575] Then, after receiving the RRC reconfiguration complete message, candidate MN1 determines, according to RRC processing identifier 1, that the configuration information selected by the UE is configuration information #A.

[0576] The configuration information #A includes the configuration information of PCell 1 and the configuration information of PSCell 1. At this time, the target MN1 determines that the target SN where PSCell 1 is located is SN1 according to the configuration information of PSCell1, and sends an SN reconfiguration complete message to SN1.

[0577] Furthermore, the target MN1 determines that the UE uses the MCG configuration (PCell1) for communication according to the configuration information of PCell1 and the configuration information of PSCell1.

[0578] Optionally, the method may also include: the UE sends an eighth indication message to the target MN, and the eighth indication message is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells. It should be noted that the specific description of the eighth indication message can refer to the relevant description of the third indication message above, and for the sake of simplicity, it will not be repeated here.

[0579] Step S11100: When the RRC connection reconfiguration process is successful, the target MN sends an SN reconfiguration completion message to the target SN.

[0580] In S11100, the target MN may also send eighth indication information to the target SN. It should be noted that the specific description of the eighth indication information may refer to the related description of the third indication information above, and for the sake of simplicity, it will not be repeated here.

[0581] Step S11110: The UE performs a synchronization process to the target SN where the selected candidate primary and secondary cells are located.

[0582] For the description of step S11110, please refer to the existing protocol and will not be repeated here for the sake of simplicity.

[0583] It should be noted that in this application, since the current RRC processing identifier has limited values, for example, the value range of the RRC processing identifier is [0, 3], the maximum number of configuration information that each candidate MN can provide is implicitly constrained. At this time, the value range of the RRC processing identifier can be extended, and the candidate MN should ensure that the values ​​of the RRC processing identifiers allocated for different configuration information extensions are different.

[0584] According to the technical solution of the present application, the target MN can identify the configuration information selected by the UE, so that the target MN can determine the selected target SN and the MCG configuration required for UE communication. Furthermore, the target SN can also determine the configuration information selected by the UE, thereby determining the SCG configuration selected by the UE.

[0585] Fig.12 A schematic flow chart of a communication method 1200 provided in an embodiment of the present application is shown in FIG. Fig.12 As shown, the method includes at least the following steps.

[0586] S1210: The second network device sends at least one ninth configuration information to the first network device.

[0587] Specifically, each ninth configuration information in the at least one ninth configuration information includes configuration information of a primary cell and configuration information of primary and secondary cells associated with the primary cell.

[0588] In a possible implementation manner, different ninth configuration information corresponds to different primary and secondary cells.

[0589] It can be understood that the ninth configuration information is associated with the primary and secondary cells, or it can be understood that at least one ninth configuration information is mapped one-to-one to at least one primary and secondary cell, or it can be understood that at least one ninth configuration information is mapped one-to-one to at least one primary and secondary cell.

[0590] Optionally, in a possible implementation manner, one or more ninth configuration information in the at least one ninth configuration information further includes parameters related to execution conditions of switching to the primary and secondary cells.

[0591] Exemplarily, assuming that the primary cell served by the second network device is PCell1, the ninth configuration information (configuration information #a-#d) in the present application is introduced in detail.

[0592] a: Configuration information #a, including: RRC reconfiguration message 1, which includes the configuration information of candidate PCell 1 under candidate MN 1, as well as the configuration information of candidate PSCell 1 associated with candidate PCell 1 and related parameters of the execution condition of PSCell 1.

[0593] b: Configuration information #b, including: RRC reconfiguration message 2, which includes the configuration information of candidate PCell 1 under candidate MN1, and the configuration information of candidate PSCell 2 associated with candidate PCell 1.

[0594] c: Configuration information #c, including: RRC reconfiguration message 3, which includes the configuration information of candidate PCell 1 under candidate MN 1, as well as the configuration information of candidate PSCell 3 associated with candidate PCell 1 and related parameters of the execution condition of PSCell 3.

[0595] d: Configuration information #d, including: RRC reconfiguration message 4, which includes the configuration information of candidate PCell 1 under candidate MN1, and the configuration information of candidate PSCell 4 associated with candidate PCell 1.

[0596] S1220: The first network device sends at least one tenth configuration information to the terminal device.

[0597] Specifically, each tenth configuration information in the at least one tenth configuration information includes configuration information of the primary cell, execution conditions for switching to the primary cell, and configuration information of primary and secondary cells associated with the primary cell.

[0598] Optionally, in a possible implementation manner, one or more tenth configuration information in the at least one tenth configuration information further includes an execution condition for switching to a primary or secondary cell.

[0599] Exemplarily, assuming that the primary cells served by the second network device are PCell1 and PCell2, the tenth configuration information (configuration information #A-#D) in this application is introduced in detail.

[0600] a: Configuration information #A, including: RRC reconfiguration message 1, which includes configuration information of candidate PCell 1 under candidate MN 1 and configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, configuration information 1 also includes execution conditions of candidate PCell 1 and execution conditions of candidate PSCell 1.

[0601] b: Configuration information #B, including: RRC reconfiguration message 2, which includes configuration information of candidate PCell 1 under candidate MN 1 and configuration information of candidate PSCell 2 associated with candidate PCell 1. In addition, configuration information 2 also includes execution conditions of candidate PCell 1 and execution conditions of candidate PSCell 2.

[0602] c: Configuration information #C, including: RRC reconfiguration message 3, which includes configuration information of candidate PCell 2 under candidate MN1 and configuration information of candidate PSCell 3 associated with candidate PCell 2. In addition, configuration information 3 also includes execution conditions of candidate PCell 2 and candidate PSCell 3.

[0603] d: Configuration information #D, including: RRC reconfiguration message 4, which includes the configuration information of candidate PCell 2 under candidate MN1 and the configuration information of candidate PSCell 4 associated with candidate PCell 2. In addition, the configuration information 3 also includes the execution conditions of candidate PCell 2 and candidate PSCell 4.

[0604] S1230: The terminal device sends third information to the second network device.

[0605] Specifically, the third information is used to indicate the primary and secondary cells included in the configuration information selected by the terminal device.

[0606] Optionally, the third information is included in an RRC reconfiguration complete message.

[0607] The third information may be the PCI of the primary and secondary cells included in the configuration information selected by the terminal device, or may be the frequency information of the primary and secondary cells included in the configuration information selected by the terminal device. It should be understood that the embodiment of the present application does not limit this.

[0608] S1240: The second network device determines the configuration information selected by the terminal device according to the third information.

[0609] Exemplarily, in a possible implementation, the second network device receives the third information, for example, the third information indicates the PCI of PSCell4. At this time, the second network device determines that the configuration information selected by the terminal device includes the primary and secondary cells (PSCell4) according to the PCI of PSCell4. Further, the second network device determines the configuration information selected by the terminal device (configuration information #D).

[0610] The second network device determines the target SN where PSCell4 is located, for example, SN2. At this time, the second network device can forward the SN reconfiguration completion message received from the terminal device to SN2.

[0611] Optionally, in a possible implementation, the method may further include: the second network device sends seventh indication information to the third network device, where the seventh indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

[0612] Optionally, in a possible implementation manner, the method may further include: the terminal device sends seventh indication information to the second network device, and the second network device forwards the seventh indication information to the third network device.

[0613] It should be noted that for the specific description of the seventh indication information, reference may be made to the relevant description of the third indication information mentioned above, and for the sake of simplicity, it will not be repeated here.

[0614] It should be understood that in this embodiment, in order for the second network device to successfully perform the access process with the terminal setting and successfully receive the third information, the third information is used to indicate the primary and secondary cells, and this embodiment also includes: the network device is the same as the first configuration in the configuration information containing the same primary cell. The first configuration includes the configuration required for the terminal device to access the primary cell and send the third information to the primary cell. For example, the first configuration includes a random access configuration (such as preamble configuration information, random access response configuration information, etc.) and an uplink data shared channel (PUSCH) configuration, etc.

[0615] The communication method provided by the present application is described in detail below in conjunction with specific embodiments.

[0616] Fig.13 A schematic flow chart of a communication method 1300 provided in an embodiment of the present application is shown as follows: Fig.13 As shown, the method includes at least the following steps.

[0617] Step S1310: The source MN sends a handover request message to the candidate MN.

[0618] Step S1320: The candidate MN sends an SN adding request message to the candidate SN where the candidate PSCell is located, requesting the candidate SN to prepare resources.

[0619] Step S1330: The candidate SN replies to the corresponding candidate MN with an SN adding request confirmation message.

[0620] It should be noted that the specific description of S1310-S1330 can be referred to the existing protocol and will not be repeated here.

[0621] Step S1340: The candidate MN sends a handover request confirmation message to the source MN.

[0622] In the handover request confirmation message, the candidate MN sends at least one ninth configuration information to the source MN, and correspondingly, the source MN receives the ninth configuration information.

[0623] It should be noted that for the relevant description of the ninth configuration information, please refer to the previous S1210, which will not be repeated here for the sake of simplicity.

[0624] Step S1350: The source MN sends an RRC reconfiguration message to the UE.

[0625] In the RRC reconfiguration message, the source MN sends at least one tenth configuration information to the UE, and correspondingly, the UE receives the tenth configuration information.

[0626] It should be noted that for the relevant description of the tenth configuration information, please refer to the previous S1220, which will not be repeated here for the sake of simplicity.

[0627] Step S1360: The UE replies an RRC reconfiguration completion message to the source MN.

[0628] Step S1370: The UE continues to maintain the connection with the source MN and the connection with the source SN (if the UE is configured with a PSCell), and after receiving the CHO configuration, starts to evaluate the execution conditions of the candidate PCell and the execution conditions of the candidate PSCell.

[0629] S1380: If at least one candidate PCell satisfies its corresponding execution condition, and the candidate PSCell associated with the PCell satisfies the execution condition corresponding to the PSCell, the UE disconnects from the source MN and performs a synchronization process to the candidate PCell using the stored configuration of the selected PCell and the associated PSCell.

[0630] It should be noted that the specific description of S1350-S1380 can be referred to the existing protocol and will not be repeated here.

[0631] Step S1390: The UE sends an RRC reconfiguration complete message to the target MN, and correspondingly, the target MN receives the RRC reconfiguration complete message.

[0632] It should be noted that for the specific description of the RRC reconfiguration completion message, reference may be made to the existing protocol. For the sake of simplicity, only the differences from the existing protocol are described below.

[0633] Among them, the RRC reconfiguration completion message includes third information, and the third information is used to indicate the primary and secondary cells included in the configuration information selected by the terminal device. Specifically, the third information can be the PCI of the primary and secondary cells included in the configuration information selected by the terminal device, or it can also be the frequency information of the primary and secondary cells included in the configuration information selected by the terminal device. It should be understood that the embodiment of the present application is not limited to this.

[0634] After receiving the third information, the target MN determines the configuration information selected by the terminal device according to the third information.

[0635] Exemplarily, in a possible implementation, the second network device receives the third information, for example, the third information indicates the PCI of PSCell4. At this time, the second network device determines that the configuration information selected by the terminal device includes the primary and secondary cells (PSCell4) according to the PCI of PSCell4. Further, the second network device determines the configuration information selected by the terminal device (configuration information #D).

[0636] The second network device determines the target SN where PSCell4 is located, for example, SN2.

[0637] Optionally, in a possible implementation manner, the method may further include: the terminal device sends seventh indication information to the second network device, and accordingly, the second network device receives the seventh indication information.

[0638] Among them, the seventh indication information is used to indicate whether the configuration information selected by the terminal device includes the execution conditions for switching to the primary and secondary cells.

[0639] It should be noted that for the specific description of the seventh indication information, reference may be made to the relevant description of the third indication information mentioned above, and for the sake of simplicity, it will not be repeated here.

[0640] Step S13100: If the RRC connection reconfiguration process is successful, the target MN informs the (target) SN via an SN reconfiguration completion message.

[0641] Optionally, the method further includes: the target MN forwarding the seventh indication information to the target SN.

[0642] S13110, the UE performs a synchronization process to the target SN where the selected candidate primary and secondary cells are located.

[0643] For the description of step S13100, please refer to the existing protocol and will not be repeated here for the sake of simplicity.

[0644] According to the technical solution of the present application, the target MN can identify the configuration information selected by the UE, and further, the target MN can determine the selected target SN.

[0645] Fig.14 A schematic flow chart of a communication method provided in an embodiment of the present application is shown in FIG. Fig.14 As shown, the method includes at least the following steps.

[0646] S1410. The first network device receives at least one eleventh configuration information sent by the second network device.

[0647] Specifically, each eleventh piece of configuration information in the at least one eleventh piece of configuration information includes configuration information of a primary cell served by the second network device.

[0648] S1420: The first network device sends fourth information to the second network device.

[0649] Specifically, the fourth information is used to indicate an association relationship between at least one configuration information associated with the second network device and at least one fourth identifier, and the fourth identifier is used to identify the eleventh configuration information.

[0650] The fourth indication information indicates that the implementation methods of the above association relationship may include the following two methods:

[0651] Implementation method 1: The fourth indication information includes at least one configuration information and at least one fourth identifier, wherein the at least one configuration information and the at least one fourth identifier correspond one to one.

[0652] Implementation method 2: The fourth indication information includes at least one fourth identifier, wherein the at least one fourth identifier corresponds one-to-one to at least one configuration information sent by the third network device to the second network device.

[0653] It should be noted that the fourth identifier may be the condition configuration ID mentioned above, or may be other identification information. It should be understood that the embodiment of the present application does not limit this.

[0654] It should also be noted that the association relationship between the eleventh configuration information and the fourth identifier can be understood as a one-to-one mapping between at least one eleventh configuration information and at least one fourth identifier, or can be understood as a one-to-one correspondence between at least one eleventh configuration information and at least one fourth identifier.

[0655] Optionally, in a possible implementation manner, one or more seventh configuration information in the at least one seventh configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0656] Optionally, in a possible implementation manner, one or more eleventh configuration information in the at least one eleventh configuration information further includes parameters related to execution conditions of switching to the primary and secondary cells.

[0657] Exemplarily, assuming that the primary cell served by the second network device is PCell1, the eleventh configuration information (configuration information #a-#c) in this application is introduced in detail.

[0658] a: Configuration information #a, including: a fourth identifier (identifier A), an RRC reconfiguration message 1, wherein the RRC reconfiguration message 1 includes the configuration information of the candidate PCell 1 under the candidate MN 1, and the configuration information of the candidate PSCell 1 associated with the candidate PCell 1.

[0659] b: Configuration information #b, including: a fourth identifier (identifier B), an RRC reconfiguration message 2, wherein the RRC reconfiguration message 2 includes configuration information of the candidate PCell 1 under the candidate MN1, and an execution condition of the candidate PCell 2.

[0660] c: Configuration information #c, including: a fourth identifier (identifier C), an RRC reconfiguration message 1, wherein the RRC reconfiguration message 1 includes the configuration information of the candidate PCell 1 under the candidate MN 1, as well as the configuration information of the candidate PSCell 1 associated with the candidate PCell 1 and relevant parameters of the execution conditions of the candidate PSCell 1.

[0661] S1430: The first network device sends at least one twelfth configuration information to the terminal device.

[0662] Specifically, each twelfth configuration information in the at least one twelfth configuration information includes configuration information of the primary cell, an execution condition for switching to the primary cell, and a fourth identifier.

[0663] Optionally, in a possible implementation manner, one or more twelfth configuration information in the at least one twelfth configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

[0664] Optionally, in a possible implementation manner, one or more twelfth configuration information in the at least one twelfth configuration information further includes an execution condition for switching to a primary or secondary cell.

[0665] Exemplarily, assuming that the primary cells served by the second network device are PCell1 and PCell2, the twelfth configuration information (configuration information #A-#D) in this application is introduced in detail.

[0666] a: Configuration information #A, including: a fourth identifier (identifier A), RRC reconfiguration message 1, the RRC reconfiguration message 1 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, the configuration information 1 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 1.

[0667] b: Configuration information #B, including: a fourth identifier (identifier B), RRC reconfiguration message 2, the RRC reconfiguration message 2 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 2 associated with candidate PCell 1. In addition, the configuration information 2 also includes the execution conditions of candidate PCell 1 and the execution conditions of candidate PSCell 2.

[0668] c: Configuration information #C, including: a fourth identifier (identifier C), RRC reconfiguration message 3, the RRC reconfiguration message 3 includes the configuration information of candidate PCell 2 under candidate MN1, and the configuration information of candidate PSCell 3 associated with candidate PCell 2. In addition, the configuration information 3 also includes the execution conditions of candidate PCell 2 and the execution conditions of candidate PSCell 3.

[0669] d: Configuration information #D, including: a fourth identifier 4 (identifier D), an RRC reconfiguration message 4, and the RRC reconfiguration message 4 includes the configuration information of the candidate PCell 2 under the candidate MN1, and the execution condition of the candidate PCell 2.

[0670] S1440: The terminal device sends a fourth identifier of the configuration information selected by the terminal device to the second network device.

[0671] S1450: The second network device determines the configuration information selected by the terminal device according to the fourth identifier.

[0672] Optionally, the fourth identifier is included in an RRC reconfiguration completion message.

[0673] Specifically, in a possible implementation, the second network device determines the configuration information selected by the terminal device according to the fourth identifier received from the terminal device. The second network device can determine the configuration information (or MCG configuration information) of the PCell in the configuration information selected by the terminal device according to the third identifier sent by the terminal device.

[0674] Exemplarily, the terminal device sends a fourth identifier (e.g., identifier A) of the selected configuration information to the second network device. At this time, the second network device determines that the configuration information selected by the terminal device is configuration information #A based on the fourth identifier (e.g., identifier A) and the association relationship between at least one fourth identifier and at least one configuration information determined by the second network device based on the fourth information received in step S1420.

[0675] Optionally, the second network device determines the configuration information of the primary and secondary cells (or SCG configuration information) included in the configuration information selected by the terminal device according to the fourth identifier sent by the terminal device. The second network device can also further determine the target SN selected by the terminal device according to the configuration information of the primary and secondary cells (or SCG configuration information) included in the configuration information selected by the terminal device. The second network device can forward the SN reconfiguration completion message received from the terminal device to the target SN.

[0676] Exemplarily, the second network device determines the configuration information of PSCell1 associated with PCell1 included in the configuration information #A.

[0677] Further, the second network device determines a target SN where PSCell1 is located, for example, SN1. The second network device may forward the SN reconfiguration completion message received from the terminal device to SN1.

[0678] Optionally, in a possible implementation manner, the method may further include: the first network device receives a first request message sent by the second network device.

[0679] The first request message is used to request the first network device to send an association relationship between at least one configuration information and at least one fourth identifier.

[0680] It should be understood that in this embodiment, in order to allow the second network device to successfully perform the access process with the terminal setting, and successfully receive the fourth identifier of the configuration information selected by the terminal, this embodiment also includes: the network device is the same as the first configuration in the configuration information containing the same primary cell. The first configuration includes the configuration required for the terminal device to access the primary cell and send the fourth identifier to the primary cell. For example, the first configuration includes a random access configuration (such as preamble configuration information, random access response configuration information, etc.) and an uplink data shared channel (PUSCH) configuration, etc.

[0681] The communication method provided by the present application is described in detail below in conjunction with specific embodiments.

[0682] Fig.15 A schematic flow chart of a communication method 1500 provided in an embodiment of the present application is shown in FIG. Fig.15 As shown, the method includes at least the following steps.

[0683] Step S1510: The source MN sends a handover request message to the candidate MN.

[0684] Step S1520: The candidate MN sends an SN adding request message to the candidate SN where the candidate PSCell is located, requesting the candidate SN to prepare resources.

[0685] Step S1530: The candidate SN replies to the corresponding candidate MN with an SN adding request confirmation message.

[0686] It should be noted that the relevant description of steps S1510-S1530 can be referred to the existing protocol and will not be repeated here.

[0687] Step S1540: The candidate MN sends a handover request confirmation message to the source MN.

[0688] In the handover request confirmation message, the candidate MN sends at least one eleventh configuration information to the source MN, and correspondingly, the source MN receives the eleventh configuration information.

[0689] It should be noted that for the relevant description of the eleventh configuration information, please refer to the above S1410, and for the sake of simplicity, it will not be repeated here.

[0690] Step S1550: The source MN sends fourth information to the corresponding candidate MN, and correspondingly, the candidate MN receives the fourth information.

[0691] It should be noted that for the relevant description of the fourth information, please refer to the previous text, and for the sake of simplicity, it will not be repeated here.

[0692] Optionally, after step S1550, the method further includes: S1551, the candidate MN sends the association relationship between the received at least one fourth identifier and at least one eleventh configuration information to the corresponding candidate SN.

[0693] It should be noted that the execution order of step S1550 and the following steps (step S1560 to step S1580) is not limited here.

[0694] Step S1560: The source MN sends an RRC reconfiguration message to the UE.

[0695] In the RRC reconfiguration message, the source MN sends at least one twelfth configuration information to the UE, and correspondingly, the source MN receives the twelfth configuration information.

[0696] It should be noted that for the relevant description of the twelfth configuration information, please refer to the above S1430, and for the sake of simplicity, it will not be repeated here.

[0697] Step S1570: The UE continues to maintain the connection with the source MN and the connection with the source SN (if the UE is configured with a PSCell), and after receiving the CHO configuration, starts to evaluate the execution conditions of the candidate PCell and the execution conditions of the candidate PSCell.

[0698] S1580, if at least one candidate PCell satisfies its corresponding execution condition, and the candidate PSCell associated with the PCell satisfies the execution condition corresponding to the PSCell, the UE disconnects from the source MN and performs a synchronization process to the candidate PCell using the stored configuration of the selected PCell and the associated PSCell.

[0699] It should be noted that the specific description of S1570-S1580 can be referred to the existing protocol and will not be repeated here.

[0700] Step S1590: The UE sends an RRC reconfiguration complete message to the target MN, and correspondingly, the target MN receives the RRC reconfiguration complete message.

[0701] It should be noted that for the specific description of the RRC reconfiguration completion message, reference may be made to the existing protocol. For the sake of simplicity, only the differences from the existing protocol are described below.

[0702] The RRC reconfiguration completion message includes a fourth identifier of the configuration information selected by the terminal device, and the second network device determines the configuration information selected by the terminal device according to the fourth identifier.

[0703] Exemplarily, after the UE selects the configuration information #A corresponding to PCell 1 and PSCell 1, an RRC reconfiguration complete message is sent to the candidate MN1 (target MN1) where PCell 1 is located, wherein the RRC reconfiguration message includes a fourth identifier (eg, identifier A).

[0704] Then, after receiving the RRC reconfiguration complete message, the candidate MN1 determines, according to the fourth identifier (eg, identifier A), that the configuration information selected by the UE is configuration information #A.

[0705] The configuration information #A includes the configuration information of PCell 1 and the configuration information of PSCell 1. At this time, the target MN1 determines that the target SN where PSCell 1 is located is SN1 according to the configuration information of PSCell1, and sends an SN reconfiguration complete message to SN1.

[0706] Furthermore, the target MN1 determines that the UE uses the MCG configuration (PCell1) for communication according to the configuration information of PCell1 and the configuration information of PSCell1.

[0707] Step S15100: The target MN sends a first request message to the source MN, where the first request message is used to request the source MN to send an association relationship between at least one fourth identifier and at least one twelfth configuration information.

[0708] Correspondingly, the source MN sends an association relationship between at least one fourth identifier and at least one twelfth configuration information to the target MN.

[0709] It should be noted that only one of step S15100 and step S1550 can be selected for execution. That is, after executing step S1550, step S15100 does not need to be executed, or step S1550 may be omitted and step S15100 may be executed.

[0710] Step S15110: The UE sends an RRC reconfiguration completion message to the target MN.

[0711] Specifically, the RRC reconfiguration complete message includes the fourth identifier of the configuration information selected by the UE. For example, if the UE selects configuration information #A, the RRC reconfiguration complete message includes the fourth identifier (identifier A).

[0712] Accordingly, the target MN determines that the configuration information selected by the UE is configuration information #A according to the fourth identifier (identifier A) included in the received RRC reconfiguration message and the above association relationship. Further, the target MN determines the target SN according to the configuration information of PSCell1 included in configuration information #A, and sends an SN reconfiguration completion message to the target SN.

[0713] Furthermore, the target MN determines, based on the configuration information of PCell1 and the configuration information of PSCell1, that the UE uses the MCG configuration (PCell1) for communication.

[0714] Step S15120: When the RRC connection reconfiguration process is successful, the target MN sends an SN reconfiguration completion message to the target SN.

[0715] Optionally, the SN reconfiguration complete message includes a fourth identifier corresponding to the configuration information selected by the UE. For example, the SN reconfiguration message includes a fourth identifier (identifier A).

[0716] Step S15130: The UE performs a synchronization process to the target SN where the selected candidate primary and secondary cells are located.

[0717] For the description of step S15130, please refer to the existing protocol and will not be repeated here for the sake of simplicity.

[0718] According to the technical solution of the present application, the target MN can identify the configuration information selected by the UE, so that the target MN can determine the selected target SN and the MCG configuration required for UE communication. Furthermore, the target SN can also determine the configuration information selected by the UE, thereby determining the SCG configuration selected by the UE.

[0719] At present, when a radio link failure (RLF) or cell handover failure occurs in a terminal device, the RRC reconstruction process will be triggered. During the RRC reconstruction process, if the cell selected by the UE during the cell selection process is a candidate primary cell for CHO, the UE should perform CHO to quickly restore the radio link. However, in the CHO configuration with candidate SCG, there will be a situation where one candidate primary cell (PCell) is associated with multiple candidate primary and secondary cells (PSCells) (or one PCell has multiple conditional configurations).

[0720] Therefore, if the cell candidate PCell selected by the UE during the RRC reconstruction process corresponds to multiple conditional configurations (or configuration information), the UE may not be able to determine which conditional configuration to use, and the corresponding network device cannot determine the conditional configuration used by the UE after the UE accesses.

[0721] Based on this, the present application aims to provide a communication method, so that the UE can determine the selected configuration information during the RRC reconstruction process.

[0722] Fig.16 A schematic flow chart of a communication method 1600 provided in an embodiment of the present application is shown in FIG. Fig.16 As shown, the method includes at least the following steps.

[0723] S1610, the terminal device receives the fifth information.

[0724] Specifically, the fifth information includes at least one of the following: first configuration information, second configuration information, and third configuration information.

[0725] Among them, the first configuration information includes the configuration information of the main cell and the execution conditions for switching to the main cell, but does not include the configuration information of the primary and secondary cells. The second configuration information includes the configuration information of the main cell and the execution conditions for switching to the main cell, as well as the configuration information of the default primary and secondary cells. The third configuration information includes the configuration information of the main cell and the execution conditions for switching to the main cell, as well as the configuration information of the candidate primary and secondary cells and the execution conditions for switching to the candidate primary and secondary cells.

[0726] It should be understood that the fifth information may also include configuration information of other primary cells. For example, the fifth information includes the first configuration information, the second configuration information and the third configuration information of primary cell 1, and also includes the first configuration information and the second configuration information of primary cell 2.

[0727] S1620, performing cell selection, and determining to use target configuration information when the cell selected by the terminal device is the primary cell.

[0728] It is understandable that before executing S1620, the terminal device experiences RLF or switching failure, triggering the RRC reconstruction process, and executing the cell selection process during the RRC reconstruction process.

[0729] Optionally, in a possible implementation, when the fifth information includes the first configuration information, the target configuration information is the first configuration information. That is, the terminal device determines to use the first configuration information. It can be understood that as long as the terminal device is configured with configuration information without primary and secondary cells, the terminal device selects the configuration information as the target configuration information.

[0730] Optionally, when the fifth information includes first configuration information and second configuration information, the target configuration information is the first configuration information.

[0731] Optionally, when the fifth information includes the first configuration information and the third configuration information, the target configuration information is the configuration information.

[0732] Optionally, when the fifth information includes first configuration information, second configuration information and third configuration information, the target configuration information is the first configuration information.

[0733] Optionally, in a possible implementation, when the fifth information does not include the first configuration information but includes the second configuration information, the target configuration information is the second configuration information, that is, the terminal device determines to use the second configuration information. It can be understood that when the terminal device is not configured with configuration information that does not include the primary and secondary cells, and is configured with configuration information that includes the default primary and secondary cells, the terminal device selects the conditional configuration that includes the default primary and secondary cells as the target configuration information.

[0734] Optionally, when the fifth information does not include the first configuration information but includes the second configuration information and the third configuration information, the target configuration information is the second configuration information.

[0735] Optionally, in a possible implementation, when the fifth information does not include the first configuration information and the second configuration information but includes the third configuration information, the target configuration information is the third configuration information, that is, the terminal device determines to use the third configuration information. It can be understood that when the terminal device is not configured with configuration information that does not include the primary and secondary cells and configuration information that includes the default primary and secondary cells, the terminal device selects the configuration information that includes the candidate primary and secondary cells as the target configuration information.

[0736] Specifically, in a possible implementation manner, when the third configuration information includes multiple configuration information, the target configuration information is the first third configuration information, that is, the terminal device determines to use the first third configuration information.

[0737] Exemplarily, if the third configuration information includes:

[0738] Configuration information #1 includes: conditional configuration identifier ID1, RRC reconfiguration message 1, and the RRC reconfiguration message 1 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 1 associated with candidate PCell 1. In addition, the conditional configuration 1 also includes the execution condition of candidate PCell 1 and the execution condition of candidate PSCell 1.

[0739] Configuration information #2 includes: conditional configuration identifier ID2, RRC reconfiguration message 2, and the RRC reconfiguration message 2 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 2 associated with candidate PCell 1. In addition, the conditional configuration 2 also includes the execution conditions of candidate PCell 1 and candidate PSCell 2.

[0740] Configuration information #3, conditional configuration identifier ID3, RRC reconfiguration message 3, the RRC reconfiguration message 3 includes the configuration information of candidate PCell 1 under candidate MN 1, and the configuration information of candidate PSCell 3 associated with candidate PCell 1. In addition, the conditional configuration 3 also includes the execution condition of candidate PCell 3.

[0741] If the first configuration information received by the terminal device is configuration information #1, it is determined to use configuration information #1 when performing cell switching.

[0742] Optionally, in a possible implementation, the method further includes: the terminal device receives fifth information sent by the network device, and the fifth information indicates the first conditional configuration information. The terminal device determines that the target configuration information is the first conditional configuration information based on the received fifth information. The fifth indication information is used to indicate the configuration information used by the terminal device when restoring the link. In other words, the first conditional configuration information is the configuration information used by the terminal device when restoring the link.

[0743] Exemplarily, when the fifth information indicates configuration information #2, the terminal device determines to use configuration information #2.

[0744] Optionally, in a possible implementation manner, the target configuration information is first conditional configuration information, and the first conditional configuration information includes configuration information of a first secondary primary cell.

[0745] The signal quality of the first candidate primary and secondary cell is greater than the signal quality of the second candidate primary and secondary cell, and the second candidate primary and secondary cell is any one of the candidate primary and secondary cells in the multiple condition configuration information except the first secondary primary cell.

[0746] Exemplarily, if the signal quality of candidate PSCell 1 included in conditional configuration #1 is greater than the signal quality of candidate PSCell 2 included in conditional configuration #2 and candidate PSCell 3 included in conditional configuration #3, then the target configuration information is conditional configuration #1. At this time, the terminal device uses conditional configuration #1.

[0747] The terminal device uses the target configuration information to access the primary cell corresponding to the target configuration information. Optionally, when the target configuration information includes primary and secondary cell configuration information, the terminal device also accesses the primary and secondary cells corresponding to the target configuration information.

[0748] In a possible implementation, the candidate primary and secondary cells are in a deactivated state. Optionally, the terminal device should indicate to the primary cell corresponding to the target configuration information that the candidate primary and secondary cells are in a deactivated state.

[0749] Specifically, after the UE determines to use the selected conditional configuration information, it should consider the SCG to be deactivated and indicate it to the target base station.

[0750] It should be noted that SCG is deactivated because during the RRC reconstruction process, the UE only confirms the signal quality of the PCell and cannot guarantee the quality of the SCG. Therefore, the UE should consider that the SCG is in a deactivated state.

[0751] It should be understood that the above methods provided in the embodiments of the present application can be implemented separately or in combination, and the present application does not make specific restrictions on this. Figure 4The method shown can be implemented separately Figure 6 The method shown can be implemented separately Figure 8 The method shown can be implemented separately Fig.10 For example, the method shown in FIG. 1 can also be implemented in combination on one device. Figure 4 and Figure 6 The method described above, or in combination with the implementation Figure 4 and Figure 8 The method shown, or a combination of the implementation Figure 4 and Fig.10 The method shown in the figure is not limited to this in the embodiment of the present application.

[0752] For example, Figure 8 or Fig. 9 The communication methods shown may be used in combination with other communication methods.

[0753] Specifically, when the access resources in different configuration information are the same, the network device can select the configuration information of the terminal device according to other communication methods; when the access resources in different configuration information are different, the network device can select the configuration information of the terminal device according to other communication methods; Figure 8 or Fig. 9 The communication method shown determines the configuration information selected by the terminal device.

[0754] Furthermore, the network device may send indication information for indicating whether the terminal device adopts the communication method described above, so that the network device identifies the configuration information selected by the terminal device.

[0755] The above introduces the methods 400 to 1600 proposed in this application. Fig.17 A communication device is provided in an embodiment of the present application, and the communication device includes a transceiver unit and a processing unit.

[0756] The transceiver unit may be used to implement the corresponding information transceiver function. The transceiver unit may also be called a communication interface or a communication unit. The processing unit may be used to perform processing operations.

[0757] Exemplarily, the device also includes a storage unit, which can be used to store instructions and / or data, and the processing unit can read the instructions and / or data in the storage unit so that the device implements the actions of the device in the aforementioned various method embodiments.

[0758] As an implementation method, the device can be the terminal device in the above-mentioned embodiment, or a component (such as a chip) of the terminal device. Among them, the transceiver unit and the processing unit can be used to implement relevant operations of the terminal device.

[0759] In some examples, for example, the transceiver unit may be used to perform an operation of receiving N first configuration information, and the transceiver unit may be used to perform an operation of sending a first identifier of the selected configuration information.

[0760] For another example, the transceiver unit may be configured to execute an operation of sending the first indication information to the second network device.

[0761] In other examples, the transceiver unit is used to perform an operation of receiving at least one sixth configuration information sent by the first network device, and the transceiver unit is used to perform an operation of sending an access request to the second network device on the first access resource.

[0762] For another example, the transceiver unit is used to execute an operation of sending sixth indication information to the second network device.

[0763] In other examples, the transceiver unit is used to perform an operation of receiving at least one eighth configuration information sent by the first network device, and the transceiver unit is used to perform an operation of sending second information to the second network device, where the second information is an RRC processing identifier of the configuration information selected by the terminal device.

[0764] In other examples, the transceiver unit is used to perform an operation of receiving at least one tenth configuration information sent by the first network device, and the transceiver unit is used to perform an operation of sending third information to the second network device, where the third information is used to indicate the primary and secondary cells included in the configuration information selected by the terminal device.

[0765] For another example, the transceiver unit is used to execute the operation of sending seventh indication information to the second network device, and the seventh indication information is used to indicate whether the configuration information selected by the terminal device includes the execution condition of switching to the primary and secondary cells.

[0766] In some other examples, the transceiver unit is used to perform an operation of receiving fifth information;

[0767] The processing unit is used to perform a cell selection operation and, when the cell selected by the terminal device is the primary cell, perform an operation of determining and using target configuration information.

[0768] As an implementation method, the device can be the second network device in the above embodiment, or a component (such as a chip) of the second network device. The transceiver unit and the processing unit can be used to implement related operations of the second network device.

[0769] In some examples, for example, the transceiver unit may be used to send M second configuration information to a first network device, and the transceiver unit may be used to receive a first identifier sent by a terminal device, where the first identifier is an identifier of the configuration information selected by the terminal device.

[0770] For another example, the processing unit is used to perform an operation of determining, according to the first identifier sent by the terminal device, the configuration information of the primary cell included in the configuration information selected by the terminal device.

[0771] For another example, the transceiver unit may be configured to execute an operation of sending second indication information to a third network device.

[0772] For another example, the transceiver unit may be configured to perform an operation of receiving the configuration information of the P primary and secondary cells sent by the third network device before sending the second indication information to the third network device.

[0773] For another example, the transceiver unit may be configured to send a first identifier of the configuration information selected by the terminal device to the third network device.

[0774] For another example, the transceiver unit may be configured to execute an operation of sending third indication information to a third network device.

[0775] In some examples, for example, the transceiver unit can be used to perform an operation of receiving first information sent by a first network device; the transceiver unit can be used to perform an operation of sending Q third configuration information to the first network device; the transceiver unit can be used to perform an operation of receiving a third identifier sent by a terminal device.

[0776] For another example, the transceiver unit may be configured to execute an operation of sending fourth indication information to the third network device.

[0777] For another example, before sending the fourth indication information to the third network device, the transceiver unit may be configured to perform an operation of receiving the configuration information of the X primary and secondary cells sent by the third network device.

[0778] For another example, the transceiver unit may be used to execute an operation of sending the third identifier sent by the terminal device to the third network device.

[0779] For another example, the transceiver unit may be configured to execute an operation of sending fifth indication information to the third network device.

[0780] In some examples, for example, the processing unit may be used to perform an operation of obtaining at least one fifth configuration information; the transceiver unit may be used to perform an operation of receiving an access request sent by a terminal device on a first access resource; and the processing unit may be used to perform an operation of determining the configuration information selected by the terminal device based on the first access resource.

[0781] For another example, the transceiver unit may be used to execute an operation of sending the sixth indication information sent by the terminal device to the third network device. The transceiver unit may be used to execute an operation of sending the at least one fifth configuration information to the first network device.

[0782] In some examples, the transceiver unit can be used to perform an operation of sending at least one seventh configuration information to a first network device; the transceiver unit can be used to perform an operation of receiving second information sent by a terminal device; and the processing unit is used to perform an operation of determining the configuration information selected by the terminal device based on the second information.

[0783] For another example, the processing unit may be configured to determine, based on the second information, the configuration information of the primary cell included in the configuration information selected by the terminal device.

[0784] For another example, the processing unit may be configured to determine, according to the second information, configuration information of the primary and secondary cells or the secondary nodes SN of the primary and secondary cells included in the configuration information selected by the terminal device.

[0785] In some examples, the transceiver unit is used to perform an operation of sending at least one ninth configuration information to the first network device; the transceiver unit can be used to perform an operation of receiving third information sent by the terminal device;

[0786] A processing unit is used to execute an operation of determining the configuration information selected by the terminal device according to the third information.

[0787] For another example, the transceiver unit may be used to perform an operation of receiving seventh indication information sent by the terminal device.

[0788] For another example, the transceiver unit may be configured to execute an operation of sending the seventh indication information to the third network device.

[0789] As an implementation method, the device may be the first network device in the aforementioned embodiment, or a component (such as a chip) of the first network device. The transceiver unit and the processing unit may be used to implement related operations of the first network device.

[0790] In some examples, for example, the transceiver unit is used to perform an operation of receiving M second configuration information sent by the second network device; the transceiver unit is used to perform an operation of sending N first configuration information to the terminal device.

[0791] In some examples, the transceiver unit is used to perform an operation of sending first information to a second network device; the transceiver unit is used to perform an operation of receiving Q third configuration information sent by the second network device.

[0792] For another example, the transceiver unit may be used to execute an operation of sending at least one fourth configuration information to the terminal device.

[0793] In some examples, the transceiver unit is used to perform an operation of receiving at least one eleventh configuration information sent by a second network device; the transceiver unit is used to perform an operation of sending fourth information to the second network device; and the transceiver unit is used to perform an operation of sending at least one twelfth configuration information to a terminal device.

[0794] For another example, the transceiver unit may be configured to receive a first request message sent by the second network device, where the first request message is used to request the first network device to send an association relationship between the at least one configuration information and the at least one fourth identifier.

[0795] As an implementation method, the device can be the third network device in the aforementioned embodiment, or a component (such as a chip) of the third network device. Among them, the transceiver unit and the processing unit can be used to implement relevant operations of the third network device.

[0796] In some examples, for example, the transceiver unit is used to perform an operation of sending configuration information of P primary and secondary cells to the second network device.

[0797] For another example, before receiving the second indication information sent by the second network device, the transceiver unit may be used to perform an operation of receiving the second indication information sent by the second network device; the transceiver unit may be used to perform an operation of receiving the first identifier of the configuration information selected by the terminal device sent by the second network device;

[0798] A processing unit is used to perform an operation of determining the configuration information of the primary and secondary cells included in the configuration information selected by the terminal device according to the first identifier of the configuration information selected by the terminal device.

[0799] For another example, the transceiver unit may be configured to perform an operation of receiving third indication information sent by the second network device.

[0800] It can be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0801] The transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0802] In addition, the above-mentioned transceiver unit may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit.

[0803] Fig.18Another communication device provided in an embodiment of the present application includes: a processor and a communication interface. The processor is used to execute a program or instruction stored in a memory, or read data stored in a memory, to perform related actions in the above method embodiments. Exemplarily, the processor may be one or more. The communication interface is used to receive and / or send signals.

[0804] Exemplarily, the communication device may further include a memory, and the memory is used to store computer programs or instructions and / or data. The memory may be integrated with the processor, or may be separately arranged. Of course, the communication device may also not include a memory, and the memory may be arranged outside the communication device. Exemplarily, the memory may be one or more.

[0805] Exemplarily, the processor, the communication interface, and the memory are interconnected via a bus; the bus may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The above bus may be divided into an address bus, a data bus, and a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0806] It is to be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and a NP. The processor may further include a hardware chip. The above-mentioned hardware chip may be an application specific integrated circuit (ASIC), a programmable logic device (PLD). The above-mentioned PLD may be a complex programmable logic device (CPLD), a field programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0807] It can also be understood that the memory mentioned in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache.

[0808] It is understood that if the embodiments of the present application are implemented in the form of software and sold or used as independent products, the corresponding programs (also referred to as codes or instructions) can be stored in a readable storage medium. Therefore, the present application also provides a readable storage medium, including a program, which, when executed on a device or computer, enables the device or computer to perform any possible implementation of the above scheme.

[0809] The readable storage media include: U disk, mobile hard disk, ROM, RAM, disk or CD and other media that can store program code.

[0810] The technical solution of the present application can be embodied in the form of a software product. Therefore, the present application also provides a program product, which includes: a program, when the program is run, enables a device or a computer to execute any possible implementation of the above solution.

[0811] In addition, the embodiment of the present application also provides a chip system (or chip). The chip system includes a processor and an interface circuit, the interface circuit is used to provide the processor with data, instructions or information transmission and / or reception, and the processor is used to execute any possible implementation of the above solution.

[0812] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0813] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0814] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0815] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0816] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method is executed by a terminal device, and includes: receiving N first configuration information sent by the first network device, each of the N first configuration information including configuration information of a primary cell, an execution condition for switching to the primary cell, and a first identifier, the N first configuration information including M first configuration information associated with a primary cell served by the second network device, and the first identifier being used to identify one configuration information in the M first configuration information; Sending a first identifier of the configuration information selected by the terminal device to the second network device.

2. The method according to claim 1, characterized in that One or more first configuration information among the N first configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

3. The method according to claim 2, characterized in that One or more first configuration information among the N first configuration information further includes an execution condition for switching to the primary and secondary cells.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: Sending first indication information to the second network device, wherein the first indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

5. The method according to any one of claims 1 to 4, characterized in that Each of the N first configuration information further includes a second identifier, where the second identifier is used to identify one of the N first configuration information.

6. A communication method, characterized in that: The method is performed by a second network device, and includes: Sending M second configuration information to the first network device, each of the M second configuration information includes configuration information of a primary cell served by the second network device and a first identifier, where the first identifier is used to identify one of the M second configuration information; A first identifier sent by a terminal device is received, where the first identifier is an identifier of configuration information selected by the terminal device.

7. The method according to claim 6, characterized in that The method further comprises: The configuration information of the primary cell included in the configuration information selected by the terminal device is determined according to the first identifier sent by the terminal device.

8. The method according to claim 6 or 7, characterized in that: One or more second configuration information among the M second configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

9. The method according to claim 8, characterized in that One or more second configuration information among the M second configuration information further includes parameters related to execution conditions of switching to the primary and secondary cells.

10. The method according to claim 8 or 9, characterized in that: The method further comprises: The primary and secondary cells or the secondary nodes SN of the primary and secondary cells included in the configuration information selected by the terminal device are determined according to the first identifier sent by the terminal device.

11. The method according to any one of claims 8 to 10, characterized in that The method further comprises: Sending second indication information to a third network device, where the second indication information is used to indicate an association relationship between configuration information of P primary and secondary cells associated with the third network device and the first identifier, where P is a positive integer less than or equal to M.

12. The method according to claim 11, characterized in that Before sending the second indication information to the third network device, the method further includes: Receive configuration information of the P primary and secondary cells sent by the third network device.

13. The method according to claim 11 or 12, characterized in that: The method further comprises: Sending a first identifier of the configuration information selected by the terminal device to the third network device.

14. The method according to any one of claims 8 to 13, characterized in that The method further comprises: Send third indication information to the third network device, where the third indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

15. A communication method, characterized in that: The method comprises: The first network device receives M second configuration information sent by the second network device, where each second configuration information in the M second configuration information includes configuration information of a primary cell served by the second network device and a first identifier, where the first identifier is used to identify one configuration information in the M second configuration information; The second network device sends N first configuration information to the terminal device, each of the N first configuration information includes configuration information of a primary cell, an execution condition for switching to the primary cell, and a first identifier, and the M first configuration information is configuration information associated with the primary cell served by the second network device among the N first configuration information; The terminal device sends a first identifier of the configuration information selected by the terminal device to the second network device; Wherein, N and M are positive integers, and N is greater than or equal to M.

16. A communication method, characterized in that: The method is performed by a first network device, and includes: Sending first information to the second network device, where the first information indicates K identifiers, where the K identifiers are available identifiers of one or more third configuration information associated with the second network device; receiving Q third configuration information sent by the second network device, each of the Q third configuration information comprising configuration information of a primary cell served by the second network device and a third identifier, wherein the third identifier is used to identify one of the third configuration information; The third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K.

17. The method according to claim 16, characterized in that The first information includes one or more of the following: The first information indicates a maximum number of primary cells associated with the second network device; and / or, The first information indicates a maximum number of primary and secondary cells associated with the second network device; and / or, The first information indicates a maximum number of third configuration information associated with the second network device; and / or, The first information indicates the range of the identification; and / or, The first information indicates a starting value of the identifier.

18. The method according to claim 16 or 17, characterized in that One or more third configuration information among the Q third configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

19. The method according to claim 18, characterized in that One or more third configuration information among the Q third configuration information further includes relevant parameters of execution conditions for switching to the primary and secondary cells.

20. The method according to any one of claims 16 to 19, characterized in that The method further comprises: At least one fourth configuration information is sent to the terminal device, each fourth configuration information in the at least one fourth configuration information includes configuration information of a primary cell served by the second network device, a third identifier, and an execution condition for switching to the primary cell.

21. A communication method, characterized in that: The method is performed by a second network device, and includes: Receive first information sent by a first network device, where the first information indicates K identifiers, where the K identifiers are available identifiers of one or more third configuration information associated with the second network device; Sending Q third configuration information to the first network device, where each piece of the Q third configuration information includes configuration information of a primary cell served by the second network device and a third identifier, where the third identifier is used to identify one piece of configuration information in the third configuration information; Receiving a third identifier sent by a terminal device, where the third identifier is an identifier of the configuration information selected by the terminal device; The third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K.

22. The method according to claim 21, characterized in that The first information includes one or more of the following: The first information indicates a maximum number of primary cells associated with the second network device; and / or, The first information indicates a maximum number of primary and secondary cells associated with the second network device; and / or, The first information indicates a maximum number of third configuration information associated with the second network device; and / or, The first information indicates the range of the identification; and / or, The first information indicates a starting value of the identifier.

23. The method according to claim 21 or 22, characterized in that One or more third configuration information among the Q third configuration information further includes configuration information of a primary and secondary cell, and the primary and secondary cells are associated with the primary cell.

24. The method according to claim 23, characterized in that One or more third configuration information among the Q third configuration information further includes relevant parameters of execution conditions for switching to the primary and secondary cells.

25. The method according to any one of claims 23 to 24, characterized in that The method further comprises: Send fourth indication information to the third network device, where the fourth indication information is used to indicate an association relationship between configuration information of X primary and secondary cells associated with the third network device and the third identifier, where X is a positive integer less than or equal to Q.

26. The method according to claim 25, characterized in that Before sending the fourth indication information to the third network device, the method further includes: Receive configuration information of the X primary and secondary cells sent by the third network device.

27. The method according to claim 25 or 26, characterized in that The method further comprises: The third identifier sent by the terminal device is sent to the third network device.

28. The method according to any one of claims 24 to 27, characterized in that The method further comprises: Send fifth indication information to the third network device, where the fifth indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

29. A communication method, characterized in that: The method comprises: The first network device sends first information to the second network device, where the first information indicates K identifiers, and the K identifiers are available identifiers of one or more third configuration information associated with the second network device; The second network device sends Q third configuration information to the first network device, where each piece of the Q third configuration information includes configuration information of a primary cell served by the second network device and a third identifier, where the third identifier is used to identify one piece of configuration information in the third configuration information; The first network device sends the Q third configuration information to the terminal device; The terminal device sends a third identifier of the configuration information selected by the terminal device to the second network device; The third identifier belongs to the K identifiers, Q and K are positive integers, and Q is less than or equal to K.

30. A communication method, characterized in that: The method is performed by a second network device, and includes: Obtain at least one fifth configuration information, where each fifth configuration information in the at least one fifth configuration information includes configuration information of a primary cell and access resource information of the primary cell, wherein different fifth configuration information includes different access resource information of the primary cell; Receiving an access request sent by a terminal device on a first access resource; The configuration information selected by the terminal device is determined according to the first access resource.

31. The method according to claim 30, characterized in that One or more fifth configuration information among the at least one fifth configuration information further includes configuration information of primary and secondary cells, and the primary and secondary cells are associated with the primary cell.

32. The method according to claim 31, characterized in that One or more fifth configuration information among the at least one fifth configuration information further includes parameters related to the execution condition of the switching to the primary and secondary cells.

33. The method according to claim 31 or 32, characterized in that The method further comprises: The sixth indication information sent by the terminal device is sent to the third network device, where the sixth indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to the primary and secondary cells.

34. The method according to any one of claims 30 to 33, characterized in that The method further comprises: The at least one fifth configuration information is sent to the first network device.

35. A communication method, characterized in that: The method is executed by a terminal device, and includes: receiving at least one sixth configuration information sent by the first network device, the sixth configuration information including configuration information of a primary cell, an execution condition for switching to the primary cell, and access resource information of the primary cell, wherein different sixth configuration information includes different access resource information of the primary cell; An access request is sent to the second network device on the first access resource.

36. The method according to claim 35, characterized in that One or more sixth configuration information among the at least one sixth configuration information further includes configuration information of primary and secondary cells, and the primary and secondary cells are associated with the primary cell.

37. The method according to claim 36, characterized in that One or more sixth configuration information among the at least one sixth configuration information further includes an execution condition for switching to the primary and secondary cells.

38. The method according to claim 36 or 37, characterized in that The method further comprises: Send sixth indication information to the second network device, where the sixth indication information is used to indicate whether the configuration information selected by the terminal device includes an execution condition for switching to a primary or secondary cell.

39. A communication method, characterized in that: include: The second network device obtains at least one fifth configuration information, where each fifth configuration information in the at least one fifth configuration information includes configuration information of a primary cell and access resource information of the primary cell, wherein different fifth configuration information includes different access resource information of the primary cell; The second network device sends the at least one fifth configuration information to the first network device; The first network device sends at least one sixth configuration information to the terminal device, where the sixth configuration information includes configuration information of a primary cell, an execution condition for switching to the primary cell, and access resource information of the primary cell, wherein different sixth configuration information includes different access resource information of the primary cell; The terminal device sends an access request to the second network device on the first access resource; The second network device determines the configuration information selected by the terminal device according to the first access resource.

40. A communication method, characterized in that: The method comprises: The second network device sends at least one seventh configuration information to the first network device, where each seventh configuration information in the at least one seventh configuration information includes configuration information of a primary cell and a radio resource control RRC processing identifier, wherein different seventh configuration information includes different RRC processing identifiers; The first network device sends at least one eighth configuration information to the terminal device, where the eighth configuration information includes configuration information of a primary cell, an execution condition for switching to the primary cell, and an RRC processing identifier, wherein different eighth configuration information includes different RRC processing identifiers; The terminal device sends second information to the second network device, where the second information is an RRC processing identifier of the configuration information selected by the terminal device; The second network device determines the configuration information selected by the terminal device according to the second information.

41. A communication method, characterized in that: include: The second network device sends at least one ninth configuration information to the first network device, where each ninth configuration information in the at least one ninth configuration information includes configuration information of a primary cell and configuration information of primary and secondary cells associated with the primary cell; The first network device sends at least one tenth configuration information to the terminal device, where each tenth configuration information in the at least one tenth configuration information includes configuration information of a primary cell, an execution condition for switching to the primary cell, and configuration information of primary and secondary cells associated with the primary cell; The terminal device sends third information to the second network device, where the third information is used to indicate the primary and secondary cells included in the configuration information selected by the terminal device; The second network device determines the configuration information selected by the terminal device according to the third information.

42. A communication method, characterized in that: The method comprises: The first network device receives at least one eleventh configuration information sent by the second network device, where each eleventh configuration information in the at least one eleventh configuration information includes configuration information of a primary cell served by the second network device; The first network device sends fourth information to the second network device, where the fourth information is used to indicate an association relationship between at least one configuration information associated with the second network device and at least one fourth identifier, where the fourth identifier is used to identify the eleventh configuration information; The first network device sends at least one twelfth configuration information to the terminal device, where each twelfth configuration information in the at least one twelfth configuration information includes configuration information of a primary cell, an execution condition for switching to the primary cell, and the fourth identifier; The terminal device sends a fourth identifier of the configuration information selected by the terminal device to the second network device; The second network device determines the configuration information selected by the terminal device according to the fourth identifier.

43. A communication method, characterized in that: The method is executed by a terminal device, and includes: receiving fifth information, wherein the fifth information includes at least one of the following: a first condition configuration, a second condition configuration, and a third condition configuration; The first condition configuration includes configuration information of a primary cell and an execution condition for switching to the primary cell, but does not include configuration information of a primary and secondary cell; the second condition configuration includes configuration information of the primary cell and an execution condition for switching to the primary cell, and configuration information of a target primary and secondary cell; the third condition configuration includes configuration information of the primary cell and an execution condition for switching to the primary cell, and configuration information of a candidate primary and secondary cell and an execution condition for switching to the candidate primary and secondary cell; Perform cell selection, and when the cell selected by the terminal device is the primary cell, determine to use target configuration information.

44. The method according to claim 43, characterized in that In a case where the fifth information includes the first conditional configuration, the target configuration information is the first conditional configuration.

45. The method according to claim 43, characterized in that In a case where the fifth information does not include the first condition configuration but includes the second condition configuration, the target configuration information is the second condition configuration.

46. ​​The method according to claim 43, characterized in that In a case where the fifth information does not include the first condition configuration and the second condition configuration, the target configuration information is the third condition configuration.

47. The method according to claim 46, characterized in that In the case where the third conditional configuration includes a plurality of conditional configuration information, the target configuration information is the first conditional configuration information among the plurality of conditional configuration information.

48. The method according to claim 46, characterized in that In the case where the third condition configuration includes a plurality of condition configuration information, it further includes: receiving fifth information sent by the network device, the fifth information being used to indicate first conditional configuration information, the target configuration information being the first conditional configuration information, The first condition configuration information is one of the multiple condition configuration information.

49. The method according to claim 46, characterized in that In the case where the third condition configuration includes a plurality of condition configuration information, the target configuration information is the first condition configuration information, and the first condition configuration information includes configuration information of the first secondary primary cell, The signal quality of the first candidate primary and secondary cell is greater than the signal quality of the second candidate primary and secondary cell, and the second candidate primary and secondary cell is any one of the candidate primary and secondary cells included in any one of the multiple condition configuration information except the first condition configuration information.

50. The method according to any one of claims 46 to 49, characterized in that The method further comprises: The candidate primary and secondary cells are in a deactivated state.

51. A communication device, characterized in that: The method comprises a unit for executing any one of the methods of claims 1 to 5, or comprises a unit for executing any one of the methods of claims 6 to 14.

52. A communication device, characterized in that: The method comprises a unit for executing any one of the methods of claims 16 to 20, or a unit for executing any one of the methods of claims 21 to 28.

53. A communication device, characterized in that: The method comprises a unit for executing any one of the methods of claims 30-34, or a unit for executing any one of the methods of claims 35-39.

54. A computer-readable storage medium, characterized in that: Comprising a computer program or instructions, which, when executed on a computer, causes the computer to execute the method described in any one of claims 1 to 5, or causes the computer to execute the method described in any one of claims 6 to 14, or causes the computer to execute the method described in any one of claims 16 to 20, or causes the computer to execute the method described in any one of claims 21 to 28, or causes the computer to execute the method described in any one of claims 30 to 34, or causes the computer to execute the method described in any one of claims 35 to 39.

55. A computer program product, characterized in that Contains instructions, which, when executed on a computer, cause the computer to execute the method as described in any one of claims 1 to 5, or cause the computer to execute the method as described in any one of claims 6 to 14, or cause the computer to execute the method as described in any one of claims 16 to 20, or cause the computer to execute the method as described in any one of claims 21 to 28, or cause the computer to execute the method as described in any one of claims 30 to 34, or cause the computer to execute the method as described in any one of claims 35 to 39.

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