WO2023155807A1

WO2023155807A1 - Method for maintaining candidate cell, and device

Info

Publication number: WO2023155807A1
Application number: PCT/CN2023/076217
Authority: WO
Inventors: 刘选兵
Original assignee: 维沃移动通信有限公司
Priority date: 2022-02-18
Filing date: 2023-02-15
Publication date: 2023-08-24
Also published as: CN116669118A

Abstract

The embodiments of the present application belong to the technical field of communications. Disclosed are a method for maintaining a candidate cell, and a device. The method for maintaining a candidate cell in the embodiments of the present application comprises: after CPAC is triggered, a first node executing a first operation, or the first node executing the first operation on the basis of usage range information of a candidate cell, wherein the first node comprises at least one of the following: a target secondary node, a candidate secondary node and a primary node; the execution of the first operation comprises adding, modifying, releasing, activating or deactivating one or more candidate cells; the target secondary node is a secondary node where a target PSCell is located after CPAC is triggered or executed; and the candidate secondary node is a secondary node where a candidate cell for CPAC is located.

Description

Candidate cell maintenance method and equipment

cross reference

The present invention claims the priority of the Chinese patent application submitted to the China Patent Office on February 18, 2022, with the application number 202210152748.8, and the title of the invention is "Method and Equipment for Maintenance of Candidate Cells", the entire contents of which are incorporated herein by reference. inventing.

technical field

The present application belongs to the technical field of communication, and in particular relates to a method and equipment for maintaining a candidate cell.

Background technique

In related technologies, the terminal releases all candidate cells after performing the (Conditional PSCell (Primary secondary cell) Addition or Change, CPAC) process, and cannot continuously perform subsequent CPAC processes. However, in the case where the terminal is allowed to retain the candidate cell after performing CPAC to allow the subsequent CPAC process, how to maintain the candidate cell is a technical problem to be solved.

Contents of the invention

Embodiments of the present application provide a method and device for maintaining a candidate cell, which can solve the problem in the related art that a terminal cannot perform continuous CPAC due to failure to maintain a candidate cell.

In the first aspect, a method for maintaining a candidate cell is provided, including: after CPAC is triggered, the first node performs the first operation; or, the first node performs the first operation according to the use range information of the candidate cell; wherein, the The first node includes at least one of the following: a target secondary node, a candidate secondary node, and a master node; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells; the target secondary node It is the secondary node where the target PSCell after CPAC is triggered or executed; the candidate secondary node is the secondary node where the candidate cell of CPAC is located.

In a second aspect, a method for maintaining a candidate cell is provided, including: a primary node receives first candidate cell configuration information from a target secondary node, and the first candidate cell configuration information includes at least one of the following: accept or retain a or multiple candidate cells; reject one or more candidate cells; release one or more candidate cells; activate or deactivate one or more candidate cells.

In a third aspect, a method for maintaining a candidate cell is provided, including: a candidate node sends first candidate cell use range information, the first candidate cell use range information includes at least one candidate secondary cell use range information, and the use The range information is used to perform the first operation; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.

In a fourth aspect, a method for maintaining a candidate cell is provided, including: a terminal receives an RRC reconfiguration message, the RRC reconfiguration message includes information on the use range of at least one candidate cell, and the The range information is used to perform a first operation; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.

In a fifth aspect, a first node is provided, including: a processing module, configured to perform a first operation after CPAC is triggered; or, perform a first operation according to the use range information of a candidate cell; wherein, the first node Including at least one of the following: a target secondary node, a candidate secondary node, and a primary node; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells; the target secondary node is a CPAC trigger Or the secondary node where the target PSCell after execution is located; the candidate secondary node is the secondary node where the candidate cell of CPAC is located.

In a sixth aspect, a primary node is provided, including: a receiving module, configured to receive first candidate cell configuration information from a target secondary node, where the first candidate cell configuration information includes at least one of the following: accept or retain a or multiple candidate cells; reject one or more candidate cells; release one or more candidate cells; activate or deactivate one or more candidate cells.

In a seventh aspect, a candidate node is provided, including: a sending module, configured to send first candidate cell use range information, where the first candidate cell use range information includes use range information of at least one candidate secondary cell, and the use The range information is used to perform the first operation; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.

In an eighth aspect, a terminal is provided, including: a receiving module, configured to receive an RRC reconfiguration message, where the RRC reconfiguration message includes usage range information of at least one candidate cell, and the usage range information is used to perform a first operation ; The performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.

According to a ninth aspect, a terminal is provided, the terminal includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the following steps are implemented: The steps of the method described in four aspects.

In a tenth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to receive an RRC reconfiguration message, and the RRC reconfiguration message includes usage range information of at least one candidate cell, and the usage The range information is used to perform the first operation; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.

In an eleventh aspect, a network-side device is provided, the network-side device includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and the programs or instructions are executed by the processor When executed, the steps of the method described in the first aspect, the second aspect or the third aspect are realized.

A twelfth aspect provides a network side device, including a processor and a communication interface, wherein the processor and the communication interface are used to implement the method as described in the first aspect, the second aspect, or the third aspect step.

A thirteenth aspect provides a candidate cell maintenance system, including: a terminal and network-side equipment, the terminal can be used to perform the steps of the method described in the fourth aspect, and the network-side equipment can be used to perform the steps of the method described in the first aspect A step of the method described in the first aspect, the second aspect or the third aspect.

In a fourteenth aspect, a readable storage medium is provided, where programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the first aspect, the second aspect, the third aspect or The steps of the method described in the fourth aspect.

In a fifteenth aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the first aspect and the second Aspect, the step of the method described in the third aspect or the fourth aspect.

In a sixteenth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the first aspect, the first The steps of the method described in the second aspect, the third aspect or the fourth aspect.

In this embodiment of the application, the target secondary node, candidate secondary node or master node may perform the first operation after CPAC is triggered; or, the target secondary node, candidate secondary node or master node may perform the first operation according to the use range information of the candidate cell. Operation, the execution of the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells. This embodiment of the present application solves the problem that the terminal cannot perform continuous CPAC due to the inability to maintain the candidate cells in the related art The problem of the process is beneficial to the terminal to perform the continuous CPAC process, thereby reducing the related configuration overhead.

Description of drawings

FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

FIG. 2 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 3 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 4 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 6 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 7 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 8 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 9 is a schematic flowchart of a method for maintaining a candidate cell according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a first node according to an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a master node according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a candidate node according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a terminal according to an embodiment of the present application;

Fig. 16 is a schematic structural diagram of a network side device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and "second" distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

It is worth pointing out that the technology described in the embodiment of this application is not limited to the Long Term Evolution (Long Term Evolution, LTE)/LTE-Advanced (LTE-Advanced, LTE-A) system, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (Single-carrier Frequency Division Multiple Access, SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned system and radio technology, and can also be used for other systems and radio technologies. The following description describes the New Radio (NR) system for illustrative purposes, and uses NR terminology in most of the following descriptions, but these techniques can also be applied to applications other than NR system applications, such as the 6th generation (6 ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network side device 12 . Wherein, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, a super mobile personal computer (Ultra-Mobile Personal Computer, UMPC), Mobile Internet Device (Mobile Internet Device, MID), Augmented Reality (Augmented Reality, AR)/Virtual Reality (Virtual Reality, VR) equipment, robot, wearable device (Wearable Device) , Vehicle equipment (Vehicle User Equipment, VUE), Pedestrian User Equipment (PUE), smart home (household equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (Personal Computer , PC), teller machines or self-service machines and other terminal-side devices, wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets , smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal 11 . The network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point or a wireless fidelity (Wireless Fidelity, WiFi) node, etc., and the base station may be called a node B, an evolved node B (eNB), an access point Access Point, Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B, Home Evolution Type B node, Transmitting Receiving Point (Transmitting Receiving Point, TRP) or some other appropriate term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in this application In the embodiment, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

The method for maintaining a candidate cell provided by the embodiment of the present application will be described in detail below through some embodiments and application scenarios with reference to the accompanying drawings.

As shown in Figure 2, this embodiment of the present application provides a candidate cell maintenance method 200, which can be executed by the first node, in other words, the method can be executed by software or hardware installed on the first node, the first node It may be a network side device, and the method includes the following steps.

S202: After CPAC is triggered, the first node performs the first operation; or, the first node performs the first operation according to the use range information of the candidate cell; wherein the first node includes at least one of the following: target secondary node, candidate Secondary node, primary node; performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells; the target secondary node is the target primary secondary cell (Primary secondary) after CPAC is triggered or executed cell, PSCell) where the secondary node is located; the candidate secondary node is the secondary node where the CPAC candidate cell is located.

The CPAC triggering mentioned in various embodiments of the present application may include: after receiving a message sent by the terminal to indicate to the network that CPAC conditional reconfiguration execution is triggered, as in the first radio resource control (Radio Resource Control) in the subsequent embodiments , RRC) reconfiguration complete message.

Performing the first operation in this embodiment of the present application may be understood as maintaining candidate cells. The first operation is an operation process, and there are different message exchange processes in different situations or embodiments.

The usage range information of the candidate cell (subsequently or referred to as the candidate secondary cell) may include at least one of the following:

1) One or more first cell identities; where, when the cell identities of the primary and secondary cells of the terminal are the same as one of the one or more first cell identities, the candidate cell supports being a candidate cell for CPAC or The CPAC command associated with the candidate cell is valid.

2) One or more second cell identities; wherein, when the candidate cell is used as the primary secondary cell of the terminal, the secondary cell corresponding to the second cell id supports the candidate cell as CPAC or the second cell id corresponds to The CPAC command associated with the secondary cell is valid.

3) A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether a cell is reserved as a candidate cell.

In the method for maintaining a candidate cell provided in the embodiment of the present application, the target secondary node, candidate secondary node or master node can perform the first operation after CPAC is triggered; or, the target secondary node, candidate secondary node or master node can The scope information executes the first operation, and the execution of the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells. The problem that the continuous CPAC process cannot be performed is beneficial for the terminal to perform the continuous CPAC process, thereby reducing related configuration overhead.

In the method for maintaining candidate cells provided in the embodiments of the present application, network side devices and terminals can reserve available CPAC or conditional handover (Conditional Handover, CHO) candidate cells, and release unavailable candidate cells, thereby avoiding unnecessary conditional reconfiguration signals To improve the mobile performance of the terminal.

In order to describe in detail the method for maintaining the candidate cell provided by the embodiment of the present application, several situations will be described below. Case 1 will introduce that after CPAC is triggered, the target secondary node will perform the first operation; case 2 will introduce that after CPAC is triggered, the candidate secondary node will perform the first operation; case 3 will introduce that after CPAC is triggered, the primary node will perform the first operation; Case 4 will introduce that the first node performs the first operation according to the usage range information of the candidate cell.

Case 1

The first node includes the target secondary node, and when the first node performs the first operation after CPAC is triggered, the method further includes: the first node (that is, the target secondary node) sends the first operation to the primary node A candidate cell configuration information, the first candidate cell configuration information is used to indicate at least one of the following 1) to 4):

1) Accepting or retaining one or more candidate cells means that one or more candidate cells are accepted or retained by the target secondary node as target candidate cells, where the target candidate cell represents a candidate cell available to the terminal currently or after CPAC execution is completed, Subsequent similar.

2) Reject one or more candidate cells, indicating that one or more candidate cells are rejected, the candidate The cell is not used as the target candidate cell.

3) Release one or more candidate cells, which means that one or more candidate cells are released, and the candidate cells are not used as target candidate cells.

4) Activating or deactivating one or more candidate cells.

Optionally, the activating one or more candidate cells includes changing the one or more candidate cells to an activated state; wherein, the one or more candidate cells in the activated state satisfy one of the following: the one or multiple candidate cells as target candidate cells; the terminal is allowed to add or change to the one or multiple candidate cells; the terminal evaluates the one or multiple candidate cells.

Optionally, the deactivating one or more candidate cells includes changing the one or more candidate cells to a deactivated state; wherein, the one or more candidate cells in the deactivated state satisfy at least one of the following : The one or more candidate cells are not used as target cells; the terminal is not allowed to add or change to the candidate cell; the terminal suspends the evaluation of the one or more candidate cells; the terminal does not evaluate the one or more Candidate cells: the terminal does not release the conditional reconfiguration information of the one or more candidate cells.

It can be understood that the content included in the first candidate cell configuration information may be the same as the operation performed by the first node (that is, the target secondary node) to perform the first operation. For example, in embodiment 200, the first node reserves the candidate cell 1 and the candidate cell 2, then the first candidate cell configuration information may include the content that the candidate cell 1 and the candidate cell 2 are reserved.

Optionally, in the first candidate cell configuration information, the one or more candidate cells are identified by at least one of the following:

1) Cell identifier (Identifier, ID).

2) Secondary cell ID.

3) A conditional reconfiguration ID, where the conditional reconfiguration ID is used to identify the conditional reconfiguration configured by the network for the terminal.

Optionally, the first candidate cell configuration information is included in a cell group configuration message.

Optionally, the first candidate cell configuration information is carried in one of the following messages: a secondary node change confirmation message; a secondary node modification request confirmation message; a secondary node reconfiguration completion response message.

Optionally, the method further includes: the first node (that is, the target secondary node) receiving a first candidate cell configuration acknowledgment message from the master node, the first candidate cell configuration acknowledgment message is used to confirm the first A candidate cell configuration information.

Optionally, before the first node (that is, the target secondary node) sends the first candidate cell configuration information to the master node, the method further includes: the first node receives the first candidate cell information from the master node, The first candidate cell information includes CPAC candidate cells configured by the network for the terminal.

Optionally, the first candidate cell information includes at least one of the following:

1) Cell ID.

2) Secondary cell ID.

3) Conditional reconfiguration information. The conditional reconfiguration information is at least one conditional reconfiguration configured by the network for a terminal (User Equipment, UE). Further, at least one of the following is included: CPAC conditional reconfiguration initiated by the master node (Master Node, MN); CPAC conditional reconfiguration initiated by the source secondary node (Source-SN (Secondary Node), S-SN).

4) One or more execution conditions. The execution condition includes a measurement ID, or a measurement event configuration such as A4 measurement event, or a cell signal strength threshold.

5) A conditional reconfiguration ID, where the conditional reconfiguration ID is used to identify the conditional reconfiguration configured by the network for the terminal.

6) A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether a cell is reserved as a candidate cell.

Optionally, the first candidate cell information is included in a cell group configuration information message.

Optionally, the first candidate cell information is carried in one of the following messages: a secondary node reconfiguration complete message; a secondary node change request message; a secondary node modification request message.

Optionally, the first candidate cell information is sent by the master node after receiving the first radio resource control (Radio Resource Control, RRC) reconfiguration completion message sent by the terminal, and the first RRC reconfiguration completion message is The terminal is used to indicate to the network that execution of the CPAC conditional reconfiguration is triggered.

Case 2

The first node includes the candidate secondary node, and when the first node performs the first operation after CPAC is triggered, the method further includes: the first node (that is, the candidate secondary node) receives the The first condition configures the cell information, and the first condition configures the cell information including at least one of:

1) Primary and secondary cell information, such as PSCell ID, physical cell identifier, the primary and secondary cell information may be the current primary and secondary cell information after the terminal executes CPAC.

2) First candidate cell information, wherein the first candidate cell information includes CPAC candidate cells configured by the network for the terminal.

3) At least one candidate secondary cell information configured by the candidate secondary node in the first candidate cell information, wherein the first candidate cell information includes the CPAC candidate cell configured by the network for the terminal.

1) Cell ID.

2) Secondary cell ID.

3) Conditional reconfiguration information.

4) One or more execution conditions.

Optionally, the first condition configuration cell information is included in a cell group configuration information message.

Optionally, the first condition configuration cell information is carried in one of the following messages: a secondary node change request message; a secondary node modification request message.

Optionally, the method further includes: the first node (that is, the candidate secondary node) sending second candidate cell configuration information to the master node, where the second candidate cell configuration information includes at least one of the following:

1) Accept or retain one or more candidate cells.

2) Reject one or more candidate cells.

3) Release one or more candidate cells.

4) Activating or deactivating one or more candidate cells.

For details about the configuration information of the second candidate cell, refer to the explanation of the configuration information of the first candidate cell.

Optionally, the second candidate cell configuration information is included in a cell group configuration message.

Optionally, the configuration information of the second candidate cell is carried in one of the following messages: a secondary node change confirmation message; a secondary node modification request confirmation message.

Optionally, the method further includes: the first node (that is, the candidate secondary node) receives second candidate cell configuration confirmation information from the master node, and the second candidate cell configuration confirmation information is used to confirm the second candidate cell configuration confirmation information. Two candidate cell configuration information.

Case 3

The first node includes the master node, and when the first node performs the first operation after the CPAC is triggered, the first node performs the first operation includes: receiving the first RRC reconfiguration completion sent by the terminal After the message, the first node (that is, the master node) performs a first operation; wherein, the first RRC reconfiguration complete message is used by the terminal to indicate to the network that execution of CPAC conditional reconfiguration is triggered.

Optionally, before the first node performs the first operation, the method further includes: the first node determines at least one of the following:

1) The scope of use of the candidate cell. For the scope of use of the candidate cell, reference may be made to the explanation in Embodiment 200.

2) At least one candidate cell supported by the target secondary node.

3) At least one candidate cell supported by the primary and secondary cells.

4) Neighboring cell relationship between the candidate cell and the primary and secondary cells.

Optionally, the first node performs the first operation, and the method further includes: the first node sends the third candidate cell information to the target secondary node, and the third candidate cell information includes the first CPAC candidate cell information determined by the node.

Optionally, the third candidate cell information includes at least one of the following:

1) Cell ID.

2) Secondary cell ID.

4) A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether a cell is reserved as a candidate cell.

Optionally, the third candidate cell information is included in a cell group configuration information message.

Optionally, the third candidate cell information is carried in one of the following messages: a secondary node reconfiguration complete message; a secondary node change request message; a secondary node modification request message.

Optionally, the first node (that is, the master node) performs the first operation, and the method further includes: the first node sends a secondary cell activation/deactivation message or an addition or release message to a candidate secondary node, the The secondary cell activation/deactivation message is used to indicate activation/deactivation of at least one configured candidate cell, the add message is used to add a candidate cell, and the release message is used to release a candidate cell.

Optionally, the first node (that is, the master node) performs the first operation, and the method further includes: the first node sends an activation/deactivation message or an RRC reconfiguration message to the terminal, and the activation/deactivation The message is used to activate/deactivate at least one candidate cell, and the RRC reconfiguration message is used to activate/deactivate or add or release the configured at least one candidate cell.

Case 4

The first node includes the primary node or the target secondary node, and when the first node performs the first operation according to the use range information of the candidate cell, the method further includes: the first node receives First candidate cell usage range information from a candidate node, where the first candidate cell usage range information includes usage range information of at least one candidate secondary cell, where the candidate secondary cell is a candidate cell configured by the candidate secondary node.

Optionally, the usage range information of the at least one candidate secondary cell includes at least one of the following:

1) One or more first cell identities; wherein, when the cell identities of the primary and secondary cells of the terminal are the same as one of the one or more first cell identities, the candidate secondary cell supports being a candidate cell for CPAC Or the CPAC command associated with the candidate secondary cell is valid.

2) One or more second cell identities; where, when the candidate secondary cell is used as the primary secondary cell of the terminal, the secondary cell corresponding to the second cell identity supports being a candidate cell for CPAC or the The CPAC command associated with the secondary cell corresponding to the second cell identity is valid.

Optionally, the usage range information of the first candidate cell is included in a cell group configuration message.

Optionally, the usage range information of the first candidate cell is carried in a secondary node addition request confirmation message.

Optionally, before the first node receives the usage range information of the first candidate cell from the candidate node, the method further includes: the first node sends the first cell information to the candidate node, wherein, The use range information of the first candidate cell is determined by the candidate node according to the first cell information, and the first cell information includes at least one of the following: 1) CPAC candidate cell information; 2) at least one candidate cell Candidate secondary node information.

Optionally, after the first node receives the usage range information of the first candidate cell from the candidate node, the method further includes: the first node sends an RRC reconfiguration message to the terminal, and the RRC reconfiguration The message includes information about the use range of the candidate cell of at least one candidate cell.

Optionally, the first node performing the first operation according to the use range information of the candidate cell includes: after receiving the first RRC reconfiguration complete message sent by the terminal, the first node performs the first operation according to the use range information of the candidate cell The first operation; wherein, the first RRC reconfiguration complete message is used by the terminal to indicate to the network that execution of CPAC conditional reconfiguration is triggered.

Optionally, the method further includes: the first node sends a secondary cell activation/deactivation message or an add or release message to a candidate secondary node, and the secondary cell activation/deactivation message is used to indicate that the activation/deactivation is at least A configured candidate cell, the add message is used to add a candidate cell, and the release message is used to release a candidate cell that is not in use.

Optionally, the method further includes: the first node sends an activation/deactivation message or an RRC reconfiguration message to the terminal, the activation/deactivation message is used to activate/deactivate at least one candidate cell, and the RRC The reconfiguration message is used to activate/deactivate or add or release configured at least one candidate cell.

In order to describe in detail the method for maintaining a candidate cell provided by the embodiment of the present application, the following will describe in conjunction with several specific embodiments.

Embodiment one

This embodiment mainly introduces that the target secondary node (Target-SN, T-SN) maintains the candidate cell, as shown in Figure 3, this embodiment includes the following steps:

Step 1: The source secondary node (Source-SN, S-SN) initiates CPAC, for example, the S-SN sends an SN change request message to the MN.

Step 2: The master node MN sends an SN addition request message to at least one target secondary node.

Step 3: T-SN sends SN addition request confirmation message to MN, including configuration of one or more candidate cells.

Optionally, the MN sends acceptance information of the candidate PSCell to the S-SN.

Optionally, the S-SN updates the CPAC configuration information.

Optionally, the MN sends early data forwarding (Early data forwarding) information.

Step 4: The MN sends an RRC reconfiguration message to the UE, including a CPAC command.

Step 5: The UE sends an RRC reconfiguration complete message to the MN, indicating that the RRC reconfiguration message is confirmed to be received.

Step 6: MN sends SN reconfiguration complete message to S-SN.

Step 7: The UE sends a first RRC reconfiguration complete message to the MN.

The first RRC reconfiguration complete message includes the RRC reconfiguration complete message sent by the UE to the MN after the execution of the CPA or CPC conditional reconfiguration is triggered.

Step 8: The MN sends an SN change confirmation message to the S-SN.

Step 9: MN sends SN reconfiguration completion information + first candidate cell information to T-SN.

Optionally, after receiving the first RRC reconfiguration complete message sent by the UE, the MN performs the operation in step 9.

The first candidate cell information includes CPAC candidate cell information (Configured Candidate Cells) configured by the network for the UE, including at least one of the following 1) to 6):

1) Cell ID, such as a physical cell identity (Physical cell Identity).

2) Secondary cell ID, such as SCell (Secondary Cell) ID.

3) Conditional reconfiguration information. The conditional reconfiguration information is at least one conditional reconfiguration configured by the network for the UE. Further, at least one of the following is included: CPAC conditional reconfiguration initiated by the MN; CPAC conditional reconfiguration initiated by the S-SN.

5) Conditional reconfiguration ID (condReconfigId). Wherein, the conditional reconfiguration ID is used to identify the conditional reconfiguration configured by the network for the terminal.

6) Candidate cell reservation indication, used to indicate that one or more candidate cells are reserved by the MN as target candidate cells. In one embodiment, among the plurality of candidate cells configured by the network, some candidate cells are reserved by the MN and continue to be target candidate cells, and the target secondary node may continue to determine other candidate cells.

Optionally, the first candidate cell information is included in a cell group configuration information (CG-ConfigInfo) message.

Optionally, the first candidate cell information is carried in one of the following messages:

1) Secondary node reconfiguration complete message (SN Reconfiguration Complete).

2) Secondary node change request (S-NODE CHANGE REQUEST).

3) In the secondary node modification request (S-NODE MODIFICATION REQUEST) message.

It should be noted that SN is equivalent to S-NODE, and both represent secondary nodes, and the following are similar.

Step 10: The UE initiates a random access procedure, and randomly accesses the T-SN.

Step 11: The T-SN sends configuration information of the first candidate cell to the MN.

The first candidate cell configuration information includes maintenance operations for one or more candidate cells, including at least one of the following:

1) Accept or reserve one or more candidate cells. Indicates that one or more candidate cells are accepted or retained by the secondary node as target candidate cells. The target candidate cell indicates a candidate cell available to the UE currently or after CPAC execution is completed.

2) Reject (Reject) one or more candidate cells. Indicates that one or more candidate cells are rejected, and the candidate cells are not used as target candidate cells.

3) Release one or more candidate cells. Indicates that one or more candidate cells are released, and the candidate cells are not used as target candidate cells.

4) Activating or deactivating one or more candidate cells.

Optionally, the candidate cell is identified by at least one of the following information:

1) Cell ID, such as a physical cell identifier.

2) Secondary cell ID, such as SCell ID.

Optionally, the configuration information of the first candidate cell is included in a CG-Config message.

Optionally, the first candidate cell configuration information is carried in one of the following messages:

1) Secondary node change confirmation message (S-NODE CHANGE CONFIRM).

2) Secondary node modification request confirmation message (S-NODE MODIFICATION REQUEST ACKNOWLEDGE).

3) The secondary node reconfiguration complete response message. This message is used to respond to the SN reconfiguration complete message in step 9. Further, when the SN reconfiguration complete message includes the first candidate cell information, the secondary node reconfiguration complete response message is sent.

Optionally, after receiving the first candidate cell configuration information, the MN may also send a first candidate cell configuration acknowledgment message to the T-SN, and the first candidate cell configuration acknowledgment message is used to confirm the first candidate cell configuration information. A candidate cell configuration information.

Step 12: After receiving the configuration information of the first candidate cell, the MN optionally sends an SN release request (S-NODE RELEASE REQUEST) message to a potential T-SN or a candidate secondary node. The SN release request message is used to indicate to release at least one configured candidate cell.

Wherein, the SN sends the SN release request message according to the acceptance or rejection or release information included in the configuration information of the first candidate cell.

Without loss of generality: the network has configured multiple CPAC candidate cells for the UE, including Cell1, Cell2, Cell3, and Cell4. After the execution of the CPAC conditional reconfiguration is triggered, the MN sends the first candidate cell information to the T-SN, including information about the candidate cells: Cell1, Cell2, Cell3, and Cell4. The T-SN sends configuration information of the first candidate cell to the MN, including: accepting Cell1, Cell2, and Cell3; or rejecting Cell4 or releasing Cell4. The MN sends a secondary node release request message to the candidate secondary node corresponding to Cell4.

Step 13: The MN receives the SN release request confirmation message, and the SN release request confirmation message is used to indicate that the SN release request message has been received.

Step 14: After receiving the SN release request confirmation message (S-NODE RELEASE REQUEST ACKNOWLEDGE), the MN sends an RRC reconfiguration message to the UE, and the RRC reconfiguration message includes releasing at least one candidate cell.

It should be noted that this embodiment does not limit the order of the steps; in addition, this embodiment can also omit some steps or add some steps, for example, omit step 6, step 12 or step 13 and so on.

Embodiment two

This embodiment mainly introduces that the candidate secondary node determines the candidate cell, as shown in Figure 4, this embodiment includes the following steps:

Step 1: S-SN initiates CPAC, for example, S-SN sends SN change request message to MN.

Step 2: The MN sends an SN addition request message to at least one target secondary node.

Optionally, the S-SN updates the CPAC configuration information.

Step 6: MN sends SN reconfiguration complete message to S-SN.

Step 7: The UE sends a first RRC reconfiguration complete message to the MN.

The first RRC reconfiguration complete message includes the RRC reconfiguration complete message sent by the UE to the MN or SN after the execution of the CPA or CPC conditional reconfiguration is triggered.

Step 8: The MN sends an SN change confirmation message to the S-SN.

Step 9: MN sends SN reconfiguration complete message to T-SN.

Step 10: The MN sends the first conditionally configured cell information to at least one candidate secondary node (Candidate SN).

The first condition configuration cell information includes at least one of the following:

1) Primary and secondary cell information, such as PSCell ID, physical cell identifier.

Optionally, the first condition configuration cell information is included in a CG-ConfigInfo message.

Optionally, the first condition configuration cell information is carried in one of the following messages:

1) Secondary node change request (S-NODE CHANGE REQUEST) message.

2) Secondary node modification request (S-NODE MODIFICATION REQUEST) message.

Optionally, after receiving the first RRC reconfiguration complete message (see step 7) sent by the UE, the MN executes the above step 10. The first RRC reconfiguration complete message includes the RRC reconfiguration complete message sent by the UE to the MN after the execution of the CPA or CPC condition is triggered.

Step 11: The candidate secondary node sends configuration information of the second candidate cell to the MN.

The content of the second candidate cell configuration information is the same as that of the first candidate cell configuration information in Embodiment 1 including maintenance operations for one or more candidate cells, and will not be described again here.

Optionally, the configuration information of the second candidate cell is included in a cell group configuration (CG-Config) message.

Optionally, the configuration information of the second candidate cell is carried in one of the following messages:

1) Secondary node change confirmation (S-NODE CHANGE CONFIRM) message.

2) Secondary node modification request confirmation (S-NODE MODIFICATION REQUEST ACKNOWLEDGE) message.

Step 12: After receiving the second candidate cell configuration information, the MN sends second candidate cell configuration confirmation information to the candidate secondary node, and the second candidate cell configuration confirmation information is used to confirm the second candidate cell configuration information.

Wherein, the MN sends a secondary node release message, or activates/deactivates one or more candidate cells according to the operation information contained in the configuration information of the second candidate cell. For details, refer to the second candidate cell information.

Step 13: The MN sends an SN reconfiguration complete message + second candidate cell information to the T-SN.

The second candidate cell information includes at least one of the following:

2) Rejecting one or more candidate cells means that one or more candidate cells are rejected, and the candidate cells are not used as target candidate cells.

4) Activating or deactivating one or more candidate cells.

Step 14: The UE initiates a random access procedure, and randomly accesses the T-SN.

Step 15: The MN sends an RRC reconfiguration message to the UE, and the RRC reconfiguration message includes releasing at least one candidate cell.

It should be noted that this embodiment does not limit the sequence of the steps; in addition, this embodiment can also omit some steps or add some steps, for example, omit step 12 and so on.

Embodiment three

This embodiment mainly introduces that MN maintains candidate cells, as shown in Figure 5, this embodiment includes the following step:

Optionally, the S-SN updates the CPAC configuration information.

Step 6: MN sends SN reconfiguration complete message to S-SN.

Step 7: The UE sends a first RRC reconfiguration complete message to the MN.

After receiving the first RRC reconfiguration complete message sent by the UE, the MN determines the conditional candidate cell.

Optionally, the MN understands at least one of the following information:

2) At least one candidate cell supported by the target secondary node. That is, release or deactivate the candidate cells that do not support the target secondary node where the primary and secondary cells are located, and add or activate candidate cells that support the target secondary node where the primary and secondary cells are located.

3) At least one candidate cell supported by the primary and secondary cells, that is, release or deactivate a candidate cell not supported by the primary and secondary cell, and add or activate a candidate cell that supports the target secondary node where the primary and secondary cell is located.

4) The neighbor cell relationship between the candidate cell and the target secondary node. If it is a neighbor cell relationship, the candidate cell is retained or activated; otherwise, the candidate cell is released or deactivated.

Step 8: The MN sends an SN change confirmation message to the S-SN.

Step 9: The MN sends an SN reconfiguration complete message + third candidate cell information to the T-SN.

The third candidate cell information includes CPAC candidate cell information (Configured Candidate Cells) determined by the MN, including at least one of the following:

1) Cell ID, such as a physical cell identifier.

2) Secondary cell ID, such as SCell ID.

3) Conditional reconfiguration ID. Wherein, the conditional reconfiguration ID is used to identify the network to the terminal Configured conditional reconfiguration.

4) Candidate cell reservation indication, indicating that the candidate cell is reserved after CPAC.

Optionally, the third candidate cell information is included in a CG-ConfigInfo message.

Optionally, the third candidate cell information is carried in one of the following messages:

1) Secondary node reconfiguration complete message (SN Reconfiguration Complete) message.

2) Secondary node change request (S-NODE CHANGE REQUEST) message.

3) Secondary node modification request (S-NODE MODIFICATION REQUEST) message.

Step 11: The MN sends a secondary cell activation/deactivation message or an add or release message to the candidate secondary node, the secondary cell activation/deactivation message is used to indicate the activation/deactivation of at least one configured candidate cell, and the adding message uses For adding a candidate cell, the release message is used to release the candidate cell.

Step 12: The candidate secondary node performs corresponding operations according to the instruction, and sends a confirmation message to the MN.

Step 13: The MN sends an activation/deactivation message or an RRC reconfiguration message to the UE, the activation/deactivation message is used to activate/deactivate at least one candidate cell, and the RRC reconfiguration message is used to activate/deactivate or add Or release the configured at least one candidate cell.

It should be noted that this embodiment does not limit the sequence of the steps; in addition, this embodiment can also omit some steps or add some steps, for example, omit step 6, step 12 and so on.

Embodiment Four

This embodiment mainly introduces the preconfigured use range information of candidate cells, as shown in Figure 6, this embodiment includes the following steps:

Step 2: The MN sends an SN addition request message to at least one target secondary node, including eight cell information.

The first cell information includes at least one of the following:

1) CPAC candidate cell information.

2) At least one provides candidate secondary node information of the candidate cell.

The candidate secondary node determines the use range information of the first candidate cell according to the first cell information.

Optionally, the first cell information is included in a secondary node addition request message S-NODE ADDITION REQUEST.

Step 3: After receiving the SN addition request message sent by the MN, the candidate secondary node (or called a potential target secondary node) sends the first candidate cell usage range information to the MN.

The first candidate cell usage range information includes usage range information of at least one candidate secondary cell, where the candidate secondary cell is a candidate cell configured by the candidate secondary node.

2) One or more second cell identities; where, when the candidate secondary cell is used as the primary secondary cell of the terminal, the secondary cell corresponding to the second cell identity supports being a candidate cell for CPAC or the second cell identity The CPAC command associated with the corresponding secondary cell is valid.

The cell information includes physical cell ID, PSCell ID, SCell ID or conditional reconfiguration ID.

Optionally, the usage range information of the first candidate cell is included in a CG-Config message.

Optionally, the information about the use range of the first candidate cell is optionally included in a secondary node addition request confirmation (S-NODE ADDITION REQUEST ACKNOWLEDGE) message.

Step 4: The MN sends an RRC reconfiguration message to the UE, the RRC reconfiguration message includes the use range information of at least one candidate cell, and the UE receives the RRC reconfiguration message.

Step 6: MN sends SN reconfiguration complete message to S-SN.

Step 7: The UE sends a first RRC reconfiguration complete message to the MN.

Optionally, after the execution of the CPAC conditional reconfiguration is triggered or completed, the MN determines available candidate cells according to the use range information of the first candidate cell. The triggering or completion of the CPAC execution includes: the MN receives the first RRC reconfiguration completion message sent by the UE (see step 7);

The first RRC reconfiguration complete message includes the RRC reconfiguration complete message sent by the UE to the network MN or SN after the execution of the CPA or CPC condition is triggered.

Step 8: The MN sends an SN change confirmation message to the S-SN.

Step 9: MN sends SN reconfiguration complete message to T-SN.

Optionally, based on step 4, the UE releases the candidate cells that are not in the use range according to the use range information of the candidate cells.

FIG. 7 is a schematic diagram of the implementation flow of the method for maintaining a candidate cell according to an embodiment of the present application, which can be applied to a master node. As shown in FIG. 7 , the method 700 includes the following steps.

S702: The master node receives the first candidate cell configuration information from the target secondary node, and the first candidate cell configuration information includes (or is used to indicate) at least one of the following: accept or retain one or more candidate cells; reject one or multiple candidate cells; release one or more candidate cells; activate or deactivate one or more candidate cells.

In this embodiment of the application, the master node can maintain the candidate cell based on the configuration information of the first candidate cell, which solves the problem in the related art that the terminal cannot perform the continuous CPAC process due to the inability to maintain the candidate cell, and is beneficial for the terminal to perform continuous CPAC. CPAC process, thereby reducing related configuration overhead.

FIG. 8 is a schematic diagram of an implementation flow of a method for maintaining a candidate cell according to an embodiment of the present application, which can be applied to a candidate node. As shown in FIG. 8, the method 800 includes the following steps.

S802: The candidate node sends the use range information of the first candidate cell, the use range information of the first candidate cell includes the use range information of at least one candidate secondary cell, and the use range information is used (by the primary node, etc.) to perform the first operation; The performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.

In this embodiment of the application, the candidate node sends the first candidate cell usage range information, and the primary node can maintain the candidate cell according to the usage range information of the candidate secondary cell. The terminal cannot perform the continuous CPAC process, which is beneficial for the terminal to perform the continuous CPAC process, thereby reducing related configuration overhead.

Optionally, as an embodiment, the usage range information of the at least one candidate secondary cell includes at least one of the following:

FIG. 9 is a schematic diagram of an implementation flow of a method for maintaining a candidate cell according to an embodiment of the present application, which can be applied to a terminal. As shown in FIG. 9 , the method 900 includes the following steps.

S902: The terminal receives an RRC reconfiguration message, the RRC reconfiguration message includes information about the scope of use of at least one candidate cell, and the information about the scope of use is used (for the terminal, etc.) to perform the first operation; the performing the first operation includes: adding , modify, release, activate or deactivate one or more candidate cells.

In the embodiment of the present application, the terminal can maintain the candidate cell according to the use range information of the candidate cell. The embodiment of the present application solves the problem in the related art that the terminal cannot perform the continuous CPAC process due to the inability to maintain the candidate cell, which is beneficial to the terminal Perform continuous CPAC process, thereby reducing related configuration overhead.

Optionally, as an embodiment, the usage range information includes at least one of the following:

Optionally, as an embodiment, the method further includes: the terminal performing the first operation after the CPAC is triggered.

FIG. 10 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in FIG. 10 , the terminal 1000 includes the following modules.

The receiving module 1002 is configured to receive an RRC reconfiguration message, where the RRC reconfiguration message includes usage range information of at least one candidate cell, and the usage range information is used to perform a first operation; the performing the first operation includes: adding, Modify, release, activate or deactivate one or more candidate cells.

Optionally, the terminal 1000 further includes a processing module.

FIG. 11 is a schematic structural diagram of a first node according to an embodiment of the present application. As shown in FIG. 11 , the first node 1100 includes the following modules.

The processing module 1102 is configured to perform the first operation after CPAC is triggered; or, perform the first operation according to the use range information of the candidate cell; wherein the first node includes at least one of the following: a target secondary node, a candidate secondary node , the primary node; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells; the target secondary node is the secondary node where the target PSCell after CPAC triggering or execution is located; the The candidate secondary node is the secondary node where the candidate cell of the CPAC is located.

Optionally, the first node 1100 further includes a communication module.

Optionally, as an embodiment, the first node includes the target secondary node, and the first node 1100 further includes a sending module, configured to send first candidate cell configuration information to the master node, and the first candidate cell configuration The information is used to indicate at least one of the following 1) to 4):

4) Activating or deactivating one or more candidate cells.

Optionally, as an embodiment, the activating one or more candidate cells includes changing the one or more candidate cells to an activated state; wherein, the one or more candidate cells in the activated state satisfy the following One: The one or more candidate cells are used as target candidate cells; the terminal is allowed to add or change to the one or more candidate cells; the terminal evaluates the one or more candidate cells.

Optionally, as an embodiment, the deactivating one or more candidate cells includes changing the one or more candidate cells to a deactivated state; wherein, the one or more candidate cells in the deactivated state Satisfy at least one of the following: the one or more candidate cells are not used as target cells; the terminal is not allowed to add or change to the candidate cell; the terminal suspends the evaluation of the one or more candidate cells; the terminal does not evaluate the the one or more candidate cells; the terminal does not release the one or more Conditional reconfiguration information of candidate cells.

Optionally, as an embodiment, in the first candidate cell configuration information, the one or more candidate cells are identified by at least one of the following:

1) Cell ID.

2) Secondary cell ID.

Optionally, as an embodiment, the configuration information of the first candidate cell is carried in one of the following messages: a secondary node change confirmation message; a secondary node modification request confirmation message; a secondary node reconfiguration completion response message.

Optionally, as an embodiment, the first node 1100 further includes a receiving module, configured to receive a first candidate cell configuration acknowledgment message from the master node, and the first candidate cell configuration acknowledgment message is used to confirm the Configuration information of the first candidate cell.

Optionally, as an embodiment, the first node 1100 further includes a receiving module, configured to receive first candidate cell information from the master node, where the first candidate cell information includes CPAC candidate cells configured by the network for the terminal .

Optionally, as an embodiment, the first candidate cell information includes at least one of the following:

1) Cell ID.

2) Secondary cell ID.

Optionally, as an embodiment, the first candidate cell information is included in a cell group configuration information message.

Optionally, as an embodiment, the first candidate cell information is carried in one of the following messages: a secondary node reconfiguration complete message; a secondary node change request message; a secondary node modification request message.

Optionally, as an embodiment, the information of the first candidate cell is that the master node receives the terminal It is sent after the first radio resource control (Radio Resource Control, RRC) reconfiguration complete message sent by the terminal, and the first RRC reconfiguration complete message is used by the terminal to indicate to the network that execution of CPAC conditional reconfiguration is triggered.

Optionally, as an embodiment, the first node includes the candidate secondary node, and when the first node performs the first operation after CPAC is triggered, the first node 1100 further includes a receiving module configured to Receive first conditional configuration cell information from the master node, where the first conditional configuration cell information includes at least one of:

1) Cell ID.

2) Secondary cell ID.

3) Conditional reconfiguration information.

4) One or more execution conditions.

Optionally, as an embodiment, the first condition configuration cell information is included in a cell group configuration information message.

Optionally, as an embodiment, the first condition configuration cell information is carried in one of the following messages: a secondary node change request message; a secondary node modification request message.

Optionally, as an embodiment, the first node further includes a sending module, configured to send second candidate cell configuration information to the master node, where the second candidate cell configuration information includes at least one of the following:

1) Accept or retain one or more candidate cells.

2) Reject one or more candidate cells.

3) Release one or more candidate cells.

4) Activating or deactivating one or more candidate cells.

Optionally, as an embodiment, the second candidate cell configuration information is included in a cell group configuration message.

Optionally, as an embodiment, the configuration information of the second candidate cell is carried in one of the following messages: a secondary node change confirmation message; a secondary node modification request confirmation message.

Optionally, as an embodiment, the first node 1100 further includes a receiving module, configured to receive second candidate cell configuration acknowledgment information from the master node, and the second candidate cell configuration acknowledgment information is used to confirm the Configuration information of the second candidate cell.

Optionally, as an embodiment, the first node includes the master node, and when the first node executes the first operation after CPAC is triggered, the processing module 1102 is configured to receive After the first RRC reconfiguration complete message sent by the terminal, perform the first operation; wherein, the first RRC reconfiguration complete message is used by the terminal to indicate to the network that execution of CPAC conditional reconfiguration is triggered.

Optionally, as an embodiment, the processing module 1102 is further configured to determine at least one of the following:

2) At least one candidate cell supported by the target secondary node.

3) At least one candidate cell supported by the primary and secondary cells.

Optionally, as an embodiment, the first node 1100 further includes a sending module, configured to send the third candidate cell information to the target secondary node, where the third candidate cell information includes the CPAC candidate determined by the first node. community information.

1) Cell ID.

2) Secondary cell ID.

Optionally, as an embodiment, the third candidate cell information is included in a cell group configuration information message.

Optionally, as an embodiment, the third candidate cell information is carried in one of the following messages: a secondary node reconfiguration complete message; a secondary node change request message; a secondary node modification request message.

Optionally, as an embodiment, the first node 1100 further includes a sending module, configured to send a secondary cell activation/deactivation message or an addition or release message to a candidate secondary node, the secondary cell activation/deactivation The active message is used to indicate activation/deactivation of at least one configured candidate cell, the add message is used to add a candidate cell, and the release message is used to release a candidate cell.

Optionally, as an embodiment, the first node 1100 further includes a sending module, configured to send an activation/deactivation message or an RRC reconfiguration message to the terminal, the activation/deactivation message is used to activate/deactivate at least one candidate A cell, the RRC reconfiguration message is used to activate/deactivate or add or release at least one configured candidate cell.

Optionally, as an embodiment, the first node includes the primary node or the target secondary node, and when the first node performs the first operation according to the use range information of the candidate cell, the first node 1100 further includes a receiving module, configured to receive first candidate cell usage range information from a candidate node, where the first candidate cell usage range information includes usage range information of at least one candidate secondary cell, where the candidate secondary cell is the A candidate cell configured by a candidate secondary node.

Optionally, as an embodiment, the usage range information of the first candidate cell is included in a cell group configuration message.

Optionally, as an embodiment, the usage range information of the first candidate cell is carried in a secondary node addition request confirmation message.

Optionally, as an embodiment, the first node 1100 further includes a sending module, configured to send first cell information to the candidate node, where the first candidate cell usage range information is obtained by the candidate node according to the Determined by the first cell information, the first cell information includes at least one of the following: 1) CPAC candidate cell information; 2) at least one candidate secondary node information that provides the candidate cell.

Optionally, as an embodiment, the first node 1100 further includes a sending module, configured to send an RRC reconfiguration message to the terminal, where the RRC reconfiguration message includes the candidate cell usage range information of at least one candidate cell.

Optionally, as an embodiment, the first node 1100 further includes a sending module, configured to send a secondary cell activation/deactivation message or an addition or release message to a candidate secondary node, the secondary cell activation/deactivation The active message is used to indicate activation/deactivation of at least one configured candidate cell, the add message is used to add a candidate cell, and the release message is used to release a candidate cell that is not in use.

FIG. 12 is a schematic structural diagram of a master node according to an embodiment of the present application. As shown in FIG. 12 , the master node 1200 includes the following modules.

The receiving module 1202 is configured to receive first candidate cell configuration information from the target secondary node, where the first candidate cell configuration information includes at least one of the following: accept or retain one or more candidate cells; reject one or more candidate cells cell; release one or more candidate cells; activate or deactivate one or more candidate cells.

Optionally, the master node 1200 further includes a processing module.

In the embodiment of the present application, the master node can maintain the candidate cell based on the configuration information of the first candidate cell, which solves the problem in the related art that the terminal cannot perform the continuous CPAC process due to the inability to maintain the candidate cell, and is beneficial for the terminal to perform continuous CPAC. CPAC process, thereby reducing related configuration overhead.

FIG. 13 is a schematic structural diagram of a candidate node according to an embodiment of the present application. As shown in FIG. 13 , the candidate node 1300 includes the following modules.

A sending module 1302, configured to send first candidate cell usage range information, where the first candidate cell usage range information includes usage range information of at least one candidate secondary cell, where the usage range information is used to execute a first operation; the execution The first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.

Optionally, the candidate node 1300 further includes a processing module.

In this embodiment of the application, the candidate node sends the first candidate cell usage range information, and the master node can perform the first operation according to the usage range information of the candidate secondary cell. The resulting problem that the terminal cannot perform the continuous CPAC process is beneficial for the terminal to perform the continuous CPAC process, thereby reducing related configuration overhead.

2) One or more second cell identities; where the candidate secondary cell is the primary and secondary cell of the terminal cell, the secondary cell corresponding to the second cell identifier supports a candidate cell for CPAC or the CPAC command associated with the secondary cell corresponding to the second cell identifier is valid.

Optionally, as shown in FIG. 14 , this embodiment of the present application also provides a communication device 1400, including a processor 1401 and a memory 1402, and the memory 1402 stores programs or instructions that can run on the processor 1401, such as When the communication device 1400 is a terminal, when the program or instruction is executed by the processor 1401, each step of the above embodiment of the method for maintaining a candidate cell can be implemented, and the same technical effect can be achieved. When the communication device 1400 is a network-side device (such as a first node), when the program or instruction is executed by the processor 1401, each step of the above embodiment of the method for maintaining a candidate cell can be achieved, and the same technical effect can be achieved. In order to avoid duplication , which will not be repeated here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface is used to receive an RRC reconfiguration message, and the RRC reconfiguration message includes the use range information of at least one candidate cell, and the use range information is used for Executing a first operation; the performing the first operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 15 is a schematic diagram of a hardware structure of a terminal implementing an embodiment of the present application.

The terminal 1500 includes, but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509, and a processor 1510. At least some parts.

Those skilled in the art can understand that the terminal 1500 may also include a power supply (such as a battery) for supplying power to various components, and the power supply may be logically connected to the processor 1510 through the power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 15 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in this embodiment of the present application, the input unit 1504 may include a graphics processing unit (Graphics Processing Unit, GPU) 15041 and a microphone 15042, and the graphics processor 15041 is used for the image capture device ( Such as the image data of the still picture or video obtained by the camera) for processing. The display unit 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1507 includes at least one of a touch panel 15071 and other input devices 15072 . Touch panel 15071, also called touch screen. The touch panel 15071 may include two parts, a touch detection device and a touch controller. Other input devices 15072 may include, but are not limited to, physical keyboards, functional Keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, and joysticks will not be described in detail here.

In the embodiment of the present application, the radio frequency unit 1501 may transmit the downlink data from the network side device to the processor 1510 for processing after receiving it; in addition, the radio frequency unit 1501 may send uplink data to the network side device. Generally, the radio frequency unit 1501 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1509 can be used to store software programs or instructions as well as various data. The memory 1509 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required by at least one function (such as a sound playing function, image playback function, etc.), etc. Additionally, memory 1509 may include volatile memory or nonvolatile memory, or, memory 1509 may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synch link DRAM , SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DRRAM). The memory 1509 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 1510 may include one or more processing units; optionally, the processor 1510 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 1510 .

Wherein, the radio frequency unit 1501 may be configured to receive an RRC reconfiguration message, the RRC reconfiguration message includes usage range information of at least one candidate cell, and the usage range information is used to perform a first operation; the execution of the first operation includes : Add, modify, release, activate or deactivate one or more candidate cells.

In the embodiment of the present application, the terminal can maintain the candidate cell according to the use range information of the candidate cell. The embodiment of the present application solves the problem that the terminal cannot The problem of performing the continuous CPAC process is beneficial for the terminal to perform the continuous CPAC process, thereby reducing related configuration overhead.

The terminal 1500 provided in the embodiment of the present application can also implement various processes in the above embodiments of the method for maintaining candidate cells, and can achieve the same technical effect. To avoid repetition, details are not repeated here.

The embodiment of the present application also provides a network side device (such as a first node), including a processor and a communication interface, and the processor and the communication interface are used to implement the methods described in the embodiments in FIG. 2 , FIG. 7 and FIG. 8 . The network-side device embodiment corresponds to the above-mentioned network-side device method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in FIG. 16 , the network side device 1600 includes: an antenna 161 , a radio frequency device 162 , a baseband device 163 , a processor 164 and a memory 165 . The antenna 161 is connected to the radio frequency device 162 . In the uplink direction, the radio frequency device 162 receives information through the antenna 161, and sends the received information to the baseband device 163 for processing. In the downlink direction, the baseband device 163 processes the information to be sent and sends it to the radio frequency device 162 , and the radio frequency device 162 processes the received information and sends it out through the antenna 161 .

The method performed by the network side device in the above embodiments may be implemented in the baseband device 163, where the baseband device 163 includes a baseband processor.

The baseband device 163 may include at least one baseband board, for example, a plurality of chips are arranged on the baseband board, as shown in FIG. The program executes the network device operations shown in the above method embodiments.

The network side device may also include a network interface 166, such as a common public radio interface (Common Public Radio Interface, CPRI).

Specifically, the network side device 1600 in the embodiment of the present invention also includes: instructions or programs stored in the memory 165 and operable on the processor 164, and the processor 164 calls the instructions or programs in the memory 165 to execute FIG. 11 and FIG. 12 Or the method executed by each module shown in FIG. 13 achieves the same technical effect. In order to avoid repetition, it is not repeated here.

The embodiment of the present application also provides a readable storage medium, the readable storage medium stores a program or an instruction, and when the program or instruction is executed by a processor, each process of the above embodiment of the method for maintaining a candidate cell is implemented, and can To achieve the same technical effect, in order to avoid repetition, no more details are given here.

Wherein, the processor is the processor in the terminal described in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the The communication interface is coupled with the processor, and the processor is used to run programs or instructions to implement the various processes of the above embodiment of the candidate cell maintenance method, and can achieve the same technical effect. To avoid repetition, details are not repeated here.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

An embodiment of the present application further provides a computer program/program product, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the above method for maintaining a candidate cell The various processes of the embodiment can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

The embodiment of the present application also provides a maintenance system for a candidate cell, including: a terminal and a network side device, the terminal can be used to perform the steps of the method for maintaining a candidate cell as described above, and the network side device can be used to perform the above steps The steps of the method for maintaining the candidate cell.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims

A method for maintaining a candidate cell, comprising:

After the CPAC is triggered by adding or changing the conditional primary and secondary cells, the first node performs the first operation; or, the first node performs the first operation according to the use range information of the candidate cell;

Wherein, the first node includes at least one of the following: a target secondary node, a candidate secondary node, and a primary node; performing the first operation includes: adding, modifying, releasing, activating, or deactivating one or more candidate cells; The target secondary node is the secondary node where the target primary secondary cell PSCell is located after CPAC is triggered or executed; the candidate secondary node is the secondary node where the candidate cell of CPAC is located.
The method according to claim 1, wherein the first node comprises the target secondary node, and when the first node performs the first operation after CPAC is triggered, the method further comprises: the first node Sending first candidate cell configuration information to the master node, where the first candidate cell configuration information is used to indicate at least one of the following:

Accept or retain one or more candidate cells;

Reject one or more candidate cells;

release one or more candidate cells;

Activate or deactivate one or more candidate cells.
The method of claim 2, wherein,

The activating one or more candidate cells includes changing the one or more candidate cells to an activated state; wherein, the one or more candidate cells in the activated state satisfy one of the following: the one or more candidate cells the cell as a target candidate cell; the terminal is allowed to add or change to the one or more candidate cells; the terminal evaluates the one or more candidate cells; and/or

The deactivating one or more candidate cells includes changing the one or more candidate cells to a deactivated state; wherein, the one or more candidate cells in the deactivated state satisfy at least one of the following: the one or multiple candidate cells are not used as target cells; the terminal is not allowed to add or change to the candidate cell; the terminal suspends the evaluation of the one or more candidate cells; the terminal does not evaluate the one or more candidate cells; the terminal The conditional reconfiguration information of the one or more candidate cells is not released.
The method according to claim 2, wherein the one or more candidate cells are identified by at least one of the following:

Cell ID;

secondary cell ID;

A conditional reconfiguration ID, where the conditional reconfiguration ID is used to identify the conditional reconfiguration configured by the network for the terminal.
The method of claim 2, wherein,

The first candidate cell configuration information is included in a cell group configuration message; and/or

The configuration information of the first candidate cell is carried in one of the following messages: a secondary node change confirmation message; a secondary node modification request confirmation message; a secondary node reconfiguration completion response message.
The method according to claim 2, wherein the method further comprises:

The first node receives a first candidate cell configuration acknowledgment message from the master node, where the first candidate cell configuration acknowledgment message is used to confirm the configuration information of the first candidate cell.
The method according to claim 2, wherein, before the first node sends configuration information of the first candidate cell to the master node, the method further comprises:

The first node receives first candidate cell information from the master node, where the first candidate cell information includes CPAC candidate cells configured by the network for the terminal.
The method according to claim 7, wherein,

The first candidate cell information is included in a cell group configuration information message; and/or

The first candidate cell information is carried in one of the following messages: a secondary node reconfiguration complete message; a secondary node change request message; a secondary node modification request message.
The method according to claim 7, wherein,

The first candidate cell information is sent by the master node after receiving the first radio resource control RRC reconfiguration complete message sent by the terminal, and the first RRC reconfiguration complete message is used by the terminal to indicate CPAC conditions to the network Reconfiguration execution is triggered.
The method according to claim 1, wherein the first node includes the candidate secondary node, and when the first node performs the first operation after CPAC is triggered, the method further includes:

The first node receives first conditional configuration cell information from the master node, and the first conditional configuration cell information includes at least one of:

primary and secondary cell information;

first candidate cell information;

Information about at least one secondary cell candidate configured by the secondary node candidate in the first candidate cell information;

Wherein, the first candidate cell information includes CPAC candidate cells configured by the network for the terminal.
The method according to claim 7 or 10, wherein the first candidate cell information includes at least one of the following:

Cell ID;

secondary cell ID;

conditional reconfiguration information;

one or more execution conditions;

A conditional reconfiguration ID, where the conditional reconfiguration ID is used to identify the conditional reconfiguration configured by the network for the terminal;

A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether a cell is reserved as a candidate cell.
The method of claim 10, wherein,

The first condition configuration cell information is included in the cell group configuration information message; and/or

The first condition configuration cell information is carried in one of the following messages: a secondary node change request message; a secondary node modification request message.
The method according to claim 10, wherein the method further comprises: the first node sends second candidate cell configuration information to the master node, and the second candidate cell configuration information includes at least one of the following:

Accept or retain one or more candidate cells;

Reject one or more candidate cells;

release one or more candidate cells;

Activate or deactivate one or more candidate cells.
The method of claim 13, wherein,

The second candidate cell configuration information is included in a cell group configuration message; and/or

The configuration information of the second candidate cell is carried in one of the following messages: a secondary node change confirmation message; a secondary node modification request confirmation message.
The method according to claim 13, wherein the method further comprises:

The first node receives second candidate cell configuration acknowledgment information from the master node, where the second candidate cell configuration acknowledgment information is used to confirm the second candidate cell configuration information.
The method according to claim 1, wherein the first node includes the master node, and when the first node performs the first operation after CPAC is triggered, the first node performing the first operation comprises:

After receiving the first RRC reconfiguration complete message sent by the terminal, the first node performs a first operation;

Wherein, the first RRC reconfiguration complete message is used by the terminal to indicate to the network that execution of CPAC conditional reconfiguration is triggered.
The method according to claim 16, wherein, before the first node performs the first operation, the method further comprises: the first node determines at least one of the following:

The scope of use of the candidate cell;

at least one candidate cell supported by the target secondary node;

At least one candidate cell supported by the primary and secondary cells;

Neighboring relationship between the candidate cell and the primary and secondary cells.
The method of claim 16, wherein the first node performs a first operation, The method also includes:

The first node sends the third candidate cell information to the target secondary node, where the third candidate cell information includes the CPAC candidate cell information determined by the first node.
The method according to claim 18, wherein the third candidate cell information includes at least one of the following:

Cell ID;

secondary cell ID;

A conditional reconfiguration ID, where the conditional reconfiguration ID is used to identify the conditional reconfiguration configured by the network for the terminal;

A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether a cell is reserved as a candidate cell.
The method of claim 18, wherein,

The third candidate cell information is included in a cell group configuration information message; and/or

The information of the third candidate cell is carried in one of the following messages: a secondary node reconfiguration complete message; a secondary node change request message; a secondary node modification request message.
The method of claim 16, wherein the first node performs a first operation, the method further comprising:

The first node sends a secondary cell activation/deactivation message or an add or release message to a candidate secondary node, where the secondary cell activation/deactivation message is used to indicate activation/deactivation of at least one configured candidate cell, and the addition message For adding candidate cells, the release message is used for releasing candidate cells; and/or

The first node sends an activation/deactivation message or an RRC reconfiguration message to the terminal, the activation/deactivation message is used to activate/deactivate at least one candidate cell, and the RRC reconfiguration message is used to activate/deactivate or Add or release at least one configured candidate cell.
The method according to claim 1, wherein the first node includes the primary node or the target secondary node, and when the first node performs the first operation according to the use range information of the candidate cell, the The method also includes:

The first node receives first candidate cell usage range information from a candidate node, where the first candidate cell usage range information includes usage range information of at least one candidate secondary cell, and the candidate secondary cell is the candidate secondary node Configured candidate cells.
The method according to claim 22, wherein the usage range information of the at least one candidate secondary cell includes at least one of the following:

One or more first cell identities; where, when the cell identities of the primary and secondary cells of the terminal are the same as one of the one or more first cell identities, the candidate secondary cell supports CPAC The CPAC command associated with the candidate cell or the candidate secondary cell is valid;

One or more second cell identities; where, when the candidate secondary cell is used as the primary secondary cell of the terminal, the secondary cell corresponding to the second cell identity supports being a candidate cell for CPAC or the secondary cell corresponding to the second cell identity The CPAC command associated with the secondary cell is valid;

A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether a cell is reserved as a candidate cell.
The method of claim 22, wherein,

The use range information of the first candidate cell is included in a cell group configuration message; and/or

The usage range information of the first candidate cell is carried in the secondary node addition request confirmation message.
The method according to claim 22, wherein, before the first node receives the usage range information of the first candidate cell from the candidate node, the method further comprises:

The first node sends first cell information to the candidate node, wherein the use range information of the first candidate cell is determined by the candidate node according to the first cell information, and the first cell information includes the following at least one of:

CPAC candidate cell information;

At least one provides candidate secondary node information of the candidate cell.
The method according to claim 22, wherein, after the first node receives the usage range information of the first candidate cell from the candidate node, the method further comprises:

The first node sends an RRC reconfiguration message to the terminal, where the RRC reconfiguration message includes the candidate cell usage range information of at least one candidate cell.
The method according to claim 22, wherein the first node performing the first operation according to the use range information of the candidate cell comprises:

After receiving the first RRC reconfiguration complete message sent by the terminal, the first node performs a first operation according to the use range information of the candidate cell;

Wherein, the first RRC reconfiguration complete message is used by the terminal to indicate to the network that execution of CPAC conditional reconfiguration is triggered.
The method according to claim 22, wherein said method further comprises:

The first node sends a secondary cell activation/deactivation message or an add or release message to a candidate secondary node, where the secondary cell activation/deactivation message is used to indicate activation/deactivation of at least one configured candidate cell, and the addition message Used to add a candidate cell, the release message is used to release a candidate cell that is not in use; and/or

The first node sends an activation/deactivation message or an RRC reconfiguration message to the terminal, the activation/deactivation message is used to activate/deactivate at least one candidate cell, and the RRC reconfiguration message is used to activate/deactivate or Add or release at least one configured candidate cell.
A method for maintaining a candidate cell, comprising: a primary node receiving first candidate cell configuration information from a target secondary node, where the first candidate cell configuration information includes at least one of the following:

Accept or retain one or more candidate cells;

Reject one or more candidate cells;

release one or more candidate cells;

Activate or deactivate one or more candidate cells.
A method for maintaining a candidate cell, comprising:

The candidate node sends first candidate cell usage range information, where the first candidate cell usage range information includes usage range information of at least one candidate secondary cell, where the usage range information is used to perform a first operation; the performing the first operation includes : Add, modify, release, activate or deactivate one or more candidate cells.
The method according to claim 30, wherein the usage range information of the at least one candidate secondary cell includes at least one of the following:

One or more first cell identities; where, when the cell identities of the primary and secondary cells of the terminal are the same as one of the one or more first cell identities, the candidate secondary cell supports the candidate cell as CPAC or the The CPAC command associated with the candidate secondary cell is valid;

One or more second cell identities; where, when the candidate secondary cell is used as the primary secondary cell of the terminal, the secondary cell corresponding to the second cell identity supports being a candidate cell for CPAC or the secondary cell corresponding to the second cell identity The CPAC command associated with the secondary cell is valid;

A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether a cell is reserved as a candidate cell.
A method for maintaining a candidate cell, comprising:

The terminal receives an RRC reconfiguration message, the RRC reconfiguration message includes information on the scope of use of at least one candidate cell, and the information on the scope of use is used to perform a first operation; performing the first operation includes: adding, modifying, releasing, and activating Or deactivate one or more candidate cells.
The method according to claim 32, wherein the usage range information includes at least one of the following:

One or more first cell identities; where, when the cell identities of the primary and secondary cells of the terminal are the same as one of the one or more first cell identities, the candidate secondary cell supports being a candidate cell for CPAC or the The CPAC command associated with the candidate secondary cell is valid;

One or more second cell identities; where, when the candidate secondary cell is used as the primary secondary cell of the terminal, the secondary cell corresponding to the second cell identity supports being a candidate cell for CPAC or the secondary cell corresponding to the second cell identity The CPAC command associated with the secondary cell is valid;

A candidate cell reservation indication, where the candidate cell reservation indication is used to indicate whether the cell is reserved as for candidate districts.
The method of claim 32, wherein the method further comprises:

The terminal executes the first operation after the CPAC is triggered.
A first node comprising:

A processing module, configured to perform the first operation after the CPAC is triggered; or perform the first operation according to the use range information of the candidate cell;

Wherein, the first node includes at least one of the following: a target secondary node, a candidate secondary node, and a primary node; performing the first operation includes: adding, modifying, releasing, activating, or deactivating one or more candidate cells; The target secondary node is the secondary node where the target PSCell after CPAC is triggered or executed; the candidate secondary node is the secondary node where the candidate cell of CPAC is located.
A master node comprising:

A receiving module, configured to receive first candidate cell configuration information from the target secondary node, where the first candidate cell configuration information includes at least one of the following:

Accept or retain one or more candidate cells;

Reject one or more candidate cells;

release one or more candidate cells;

Activate or deactivate one or more candidate cells.
A candidate node, including:

A sending module, configured to send first candidate cell usage range information, where the first candidate cell usage range information includes usage range information of at least one candidate secondary cell, where the usage range information is used to perform a first operation; the execution of the second An operation includes: adding, modifying, releasing, activating or deactivating one or more candidate cells.
A terminal comprising:

A receiving module, configured to receive an RRC reconfiguration message, where the RRC reconfiguration message includes usage range information of at least one candidate cell, and the usage range information is used to perform a first operation; the execution of the first operation includes: adding, modifying , releasing, activating or deactivating one or more candidate cells.
A network side device, comprising a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, any one of claims 1 to 31 can be implemented. The steps of the method described in the item.
A terminal, including a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the process described in any one of claims 32 to 34 is implemented. steps of the method described above.
A readable storage medium storing programs or instructions on the readable storage medium, and implementing the steps of the method according to any one of claims 1 to 34 when the programs or instructions are executed by a processor.