CN117560728A

CN117560728A - Method and device for keeping auxiliary node unchanged

Info

Publication number: CN117560728A
Application number: CN202210934638.7A
Authority: CN
Inventors: 倪春林
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2024-02-13
Also published as: WO2024027450A1

Abstract

The embodiment of the application provides a method and a device for keeping an auxiliary node unchanged, wherein the method is applied to a terminal and comprises the following steps: sending first indication information to a target main node, wherein the first indication information is used for indicating the connection between a reserved terminal and a source auxiliary node; the main node in the pairing group currently connected with the terminal is a source main node, the auxiliary node is a source auxiliary node, and the pairing group comprises a main node and an auxiliary node. According to the method for keeping the auxiliary node unchanged, the terminal under double connection is used for sending the indication information of the reserved terminal and the source auxiliary node to the target main node in the switching execution stage, so that the corresponding target main node can be added with the source auxiliary node to form a pairing group, the way of realizing configuration of the pairing group is increased, and the efficiency of terminal switching is improved.

Description

Method and device for keeping auxiliary node unchanged

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for keeping an auxiliary node unchanged.

Background

In order to increase the robustness and reliability of mobility, conditional handoffs (Conditional Handover, CHO) are defined in the New Radio, NR, standard. The network pre-configures a certain number of cells in advance for a terminal (User Equipment) as candidate cells for UE handover, and configures certain handover conditions. After the UE receives the configuration information, the alternative target cell is detected according to the configuration execution conditions and the configuration information, and after any target cell meets the configuration execution conditions, the UE executes the condition switching.

In the case of switching the configuration conditions, the configuration may be performed for UEs having configured dual connectivity (Dual Connectivity, DC). However, if the connection between the target Master Node (MN) and the source auxiliary Node (SN) is not configured in the conditional handover preparation stage, the target MN cannot add the source SN as the SN Node for providing services to the terminal in the execution stage, which may cause handover failure, thereby reducing handover efficiency.

Therefore, when the terminal is in dual connectivity, executing the handoff procedure, how to enable the target MN to add the source SN as the SN node for providing services by the terminal has become a technical problem to be solved in the art.

Disclosure of Invention

The embodiment of the application provides a method and a device for keeping an auxiliary node unchanged, which are used for solving the problem that in the existing mechanism, when a dual-connection terminal is switched, under the condition that a target main node MN and a source auxiliary node SN are not configured to provide services for the terminal in pairs, the source SN node cannot be actively added by the MN to provide services for the terminal.

In a first aspect, an embodiment of the present application provides a method for keeping an auxiliary node unchanged, which is applied to a terminal, and includes:

sending first indication information to a target main node, wherein the first indication information is used for indicating the connection between a reserved terminal and a source auxiliary node;

The main node in the pairing group currently connected with the terminal is a source main node, the auxiliary node is a source auxiliary node, and the pairing group comprises a main node and an auxiliary node.

Optionally, before the first indication information is sent to the target master node, the method includes:

and receiving switching configuration information, wherein the switching configuration information comprises one or more pairing groups and does not comprise the pairing groups formed by the target main node and the source auxiliary node.

Optionally, the first indication information is sent through an RRC reconfiguration complete message.

Optionally, the first indication information is indication information indicating a reserved source auxiliary node, or indication information indicating failure of accessing the SCG, or no SCG related information.

In a second aspect, an embodiment of the present application further provides a method for keeping a secondary node unchanged, where the method is applied to a target primary node, and includes:

receiving first indication information sent by a terminal;

based on the received first indication information, a first message is sent to a source main node; the first message is used for indicating the source auxiliary node to reserve the connection between the terminal and the source auxiliary node through the source main node.

Optionally, the sending, based on the received first indication information, a first message to a source master node includes:

Determining whether second indication information is carried in the first message or not based on the received first indication information, wherein the second indication information is used for indicating to reserve the context information of the terminal;

and if the second indication information is carried in the first message, sending the first message to the source master node.

Optionally, after the first indication information sent by the receiving terminal, the method includes:

sending a second message to a source auxiliary node, wherein the second message is used for adding the source auxiliary node to a target main node to form a pairing group of the main node and the auxiliary node;

and determining that the source auxiliary node is successfully added based on the received feedback message of the source auxiliary node.

Optionally, the first message is a handover success message.

Optionally, the second message is a secondary node addition request message.

In a third aspect, an embodiment of the present application further provides a method for keeping a secondary node unchanged, which is applied to a source primary node, and includes:

receiving a first message sent by a target master node;

based on the received first message, second indication information is sent to the source auxiliary node;

the first message carries the second indication information, and the second indication information is used for indicating to reserve the context information of the terminal.

Optionally, the second indication information sent to the source auxiliary node is sent through an auxiliary node release request.

In a fourth aspect, embodiments of the present application further provide a terminal, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the method of keeping the secondary node unchanged as described in the first aspect above.

In a fifth aspect, embodiments of the present application further provide a target master node, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the method of keeping the secondary node unchanged as described in the second aspect above.

In a sixth aspect, embodiments of the present application further provide a source master node, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the method of keeping the secondary node unchanged as described in the third aspect above.

In a seventh aspect, an embodiment of the present application further provides an apparatus for keeping a secondary node unchanged, where the apparatus is applied to a terminal, including:

the first sending module is used for sending first indication information to the target main node, wherein the first indication information is used for indicating the connection between the reserved terminal and the source auxiliary node;

In an eighth aspect, an embodiment of the present application further provides an apparatus for keeping a secondary node unchanged, where the apparatus is applied to a target primary node, including:

the second receiving module is used for receiving the first indication information sent by the terminal;

the second sending module is used for sending a first message to the source main node based on the received first indication information; the first message is used for indicating the source auxiliary node to reserve the connection between the terminal and the source auxiliary node through the source main node.

In a ninth aspect, an embodiment of the present application further provides an apparatus for keeping a secondary node unchanged, where the apparatus is applied to a source primary node, including:

the third receiving module is used for receiving the first message sent by the target master node;

the third sending module is used for sending second indication information to the source auxiliary node based on the received first message;

In a tenth aspect, embodiments of the present application further provide a computer readable storage medium storing a computer program for causing a computer to perform the method of keeping a secondary node unchanged as described in the first aspect, the method of keeping a secondary node unchanged as described in the second aspect, or the method of keeping a secondary node unchanged as described in the third aspect.

In an eleventh aspect, the embodiments of the present application further provide a communication device, where a computer program is stored, where the computer program is configured to cause the communication device to perform a method for keeping a secondary node unchanged as described in the first aspect, or a method for keeping a secondary node unchanged as described in the second aspect, or a method for keeping a secondary node unchanged as described in the third aspect.

In a twelfth aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing a processor to perform the method of keeping a secondary node unchanged as described in the first aspect, the method of keeping a secondary node unchanged as described in the second aspect, or the method of keeping a secondary node unchanged as described in the third aspect.

In a thirteenth aspect, embodiments of the present application further provide a chip product, where a computer program is stored, where the computer program is configured to cause the chip product to perform the method for keeping the secondary node unchanged as described in the first aspect, the method for keeping the secondary node unchanged as described in the second aspect, or the method for keeping the secondary node unchanged as described in the third aspect.

According to the method and device for keeping the auxiliary node unchanged, the terminal under double connection is used for sending the indication information of the reserved terminal and the source auxiliary node to the target main node in the switching execution stage, so that the corresponding target main node can be added with the source auxiliary node to form a pairing group, the way of configuring the pairing group is increased, and the efficiency of terminal switching is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the following description will briefly describe the drawings that are required to be used in the embodiments or the related technical descriptions, and it is obvious that, in the following description, the drawings are some embodiments of the present application, and other drawings may be obtained according to these drawings without any inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a method for keeping a secondary node unchanged according to an embodiment of the present application;

FIG. 2 is a second flow chart of a method for keeping a secondary node unchanged according to an embodiment of the present application;

FIG. 3 is a third flow chart of a method for keeping a secondary node unchanged according to an embodiment of the present application;

fig. 4 is a schematic flowchart of an implementation of a method for keeping a secondary node unchanged according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a target master node according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a source master node according to an embodiment of the present application;

fig. 8 is one of schematic structural diagrams of an apparatus for keeping a secondary node unchanged according to an embodiment of the present application;

FIG. 9 is a second schematic structural diagram of an apparatus for keeping a secondary node unchanged according to an embodiment of the present application;

fig. 10 is a third schematic structural diagram of an apparatus for keeping a secondary node unchanged according to an embodiment of the present application.

Detailed Description

In the embodiment of the application, the term "and/or" describes the association relationship of the association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in the embodiments of the present application means two or more, and other adjectives are similar thereto.

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

To assist in understanding aspects of embodiments of the present application, related concepts that may be referred to herein are briefly described as follows:

a portion of Radio Bearers (RBs) of the user equipment UE are on a primary cell group (Master Cell Group, MCG) managed by a primary node MN, the portion of RBs comprising control plane bearers (Signaling Radio Bearer, SRB) and user plane bearers (Data Radio Bearer, DRB). While another part of the same UE is carried on a secondary cell group (Secondary Cell Group, SCG) managed by the secondary node SN. The node here is typically a base station, and the same UE has connections at two base stations at the same time, and is therefore referred to as a dual connection (DualConnectivity, DC).

Fig. 1 is a schematic flow chart of a method for keeping a secondary node unchanged, which is provided in an embodiment of the present application, and the method may be applied to a terminal, as shown in fig. 1, and includes:

step 101, sending first indication information to a target main node, wherein the first indication information is used for indicating the connection between a reserved terminal and a source auxiliary node;

Specifically, the terminal has established a dual-connection DC, and during the moving process, a cell handover may need to occur, and during a handover preparation phase, the network side may provide the terminal with dual-connection configuration information, where the dual-connection configuration information generally includes one or more pairing groups, and each pairing group includes a primary node and a secondary node. If the dual-connection configuration does not have a pairing group of the source auxiliary node and the target main node, and the connection of the source auxiliary node may need to be reserved during terminal switching, so that terminal switching failure is caused, and switching efficiency is reduced. The source main node and the source auxiliary node are two base stations or two cells connected when the terminal establishes dual connection before the terminal is switched. The target master node is a corresponding connection base station or cell after terminal switching, and is switched from the source master node to the target master node.

According to the method for keeping the auxiliary node unchanged, the terminal under double connection is used for sending the indication information of the reserved terminal and the source auxiliary node to the target main node in the switching execution stage, so that the corresponding target main node can be added with the source auxiliary node to form a pairing group, the way of realizing configuration of the pairing group is increased, and the efficiency of terminal switching is improved.

Specifically, the dual connection established before the terminal is switched is that the main node of the corresponding connection is the source main node, the auxiliary node is the source auxiliary node, before the first indication information is sent to the target main node, the terminal is in a switching preparation stage, and receives switching configuration information sent by the network, wherein the switching configuration information comprises one or more pairing groups, and each pairing group comprises a main node and an auxiliary node. And the above-mentioned switching configuration information does not include the pairing group of the target main node and the source auxiliary node. In this case, the terminal wants to keep the connection between itself and the source auxiliary node, if the terminal performs the switching process according to the switching configuration information, and in the switching execution stage, the target main node cannot add the auxiliary node, or of course, cannot add the source auxiliary node, then the switching failure of the terminal may be caused, and the switching efficiency is reduced. Therefore, in the stage of executing the handover, first indication information is sent to the target primary node to indicate that the connection between the terminal and the source secondary node is reserved. And further, through interaction between the target main node and the source main node, the connection between the reserved terminal and the source auxiliary node is realized.

Specifically, the terminal may send the first indication information to the target primary node through multiple ways, and in the executing handover stage, the method is mainly implemented by using an existing signaling message, such as an RRC reconfiguration complete message, where a new field is added to the message to represent the first indication information, or redefine may be performed in the existing field, such as some reserved fields, where the meaning represented by the definition is the meaning indicated by the first indication information, that is, the connection between the terminal and the source secondary node is reserved.

Specifically, the terminal sends the RRC reconfiguration complete message to the target master node, where the RRC reconfiguration complete message generally carries access information of the master node, and possibly information related to the auxiliary node. The information related to the secondary node is first indication information, where the first indication information may indicate indication information of the reserved source secondary node, indication information of SCG failure of accessing the secondary cell group, or no SCG related information. The indication information indicating the reserved auxiliary node is in a direct indication mode, and the target main node is informed of the reserved connection between the source auxiliary node and the terminal, so that the target main node is prompted to add the source auxiliary node to form a pairing group. The indication information of the failure of accessing the SCG or the information related to the SCG does not indicate that the terminal fails to access when accessing the target auxiliary node in the target pairing group according to the switching configuration information in the switching process, and the target main node is informed of the need of reserving the connection between the source auxiliary node and the terminal in an indirect mode, otherwise, the terminal may fail to switch.

Fig. 2 is a second flowchart of a method for keeping a secondary node unchanged, which is provided in an embodiment of the present application, and as shown in fig. 2, the method is applied to a target primary node, and includes:

step 201, receiving first indication information sent by a terminal;

step 202, based on the received first indication information, a first message is sent to a source master node; the first message is used for indicating the source auxiliary node to reserve the connection between the terminal and the source auxiliary node through the source main node.

Specifically, in the process of switching a terminal under dual connectivity, if a target pairing group is determined in a switching preparation stage, and the target pairing group does not include a pairing group of a target main node and a source auxiliary node, and the terminal hopes to reserve the source auxiliary node in a switching execution stage, the terminal switches according to the existing flow, which may cause switching failure. In order to realize that in the switching execution stage, the target main node can also add a source auxiliary node, in the application, the terminal sends first indication information to the target main node, where the first indication information is used to indicate to reserve the connection between the terminal and the source auxiliary node. The target master node sends a first message to the source master node, and the connection between the reserved terminal and the source auxiliary node is realized through interaction between the source master node and the source auxiliary node in the source pairing group (the source master node and the source auxiliary node).

Specifically, after receiving the first indication information sent by the terminal, the target master node determines whether the first message sent to the source master node needs to carry second indication information, namely whether the first message carries indication to reserve the context information of the terminal.

If the first indication information is indication information indicating that the source auxiliary node is reserved, or indication information indicating that the access to the SCG fails, or no SCG related information exists, the second indication information needs to be carried in the first message, and the first message carrying the second indication information is sent to the source main node. The first message may be an existing signaling message between the source host node and the target host node, that is, the second indication information is represented by a new field in the existing signaling message, or an original field is redefined, for example, some reserved fields are defined, and the meaning represented by the original field is the meaning indicated by the second indication information, that is, the context information of the reserved terminal is reserved. And informing the source main node of reserving the connection between the terminal and the source auxiliary node through the indication information. The first message is usually a handover success message.

Specifically, after receiving the first indication information sent by the terminal, the target master node tries to add the source auxiliary node, and sends a second message to the source auxiliary node, where the second message may include identification information of a connection channel between the target terminal and the source auxiliary node, such as SN UE XnAP ID. And receiving a feedback message of the source auxiliary node, and determining whether the source auxiliary node is successfully added or not based on the feedback message. If the target master node adds the source and the auxiliary nodes successfully, the corresponding target master node sends a first message to the source master node. Similarly, the second message may be an existing signaling message between the source node and the target node, that is, the meaning or the action of the new field is represented in the existing signaling message, and the source node and the target node are added to form a pairing group of the master node and the auxiliary node, or the original field is redefined, such as some reserved fields, to define the meaning or the action of the original field and the target node, and the source node and the auxiliary node are added to form the pairing group of the master node and the auxiliary node. And adding the source auxiliary main node through the second information to prepare for realizing the connection between the reserved terminal and the source auxiliary node. Wherein the first message is commonly used as the second message, and the request message is added to the auxiliary node.

FIG. 3 is a third flow chart of a method for keeping a secondary node unchanged according to an embodiment of the present application, as shown in FIG. 3, the method is applied to a source primary node, and includes

Step 301, receiving a first message sent by a target master node;

step 302, based on the received first message, sending second indication information to the source auxiliary node;

the second indication information is used for indicating to reserve the context information of the terminal.

Specifically, in the switching execution process of the terminal under the double connection, under the condition that the connection between the terminal and the source auxiliary node needs to be reserved, first indication information is sent to the target main node and used for indicating the connection between the reserved terminal and the source auxiliary node; the target master node determines that the first message sent to the source master node includes second indication information based on the first indication information. Conversely, if the message sent by the terminal to the target master node does not include the first indication information, the first message sent by the target master node to the source master node also does not carry the second indication information.

And the source main node receives the first message carrying the second indication information, determines that the connection between the terminal and the source auxiliary node needs to be reserved, and then sends the second indication information to the source auxiliary node to inform or indicate the source auxiliary node that the context of the terminal needs to be reserved, so that the source auxiliary node does not need to release the connection between the terminal and the terminal.

Specifically, there are various existing signaling messages interacted between the source main node and the source auxiliary node, and the meaning or the action represented by the existing signaling messages can be reserved by adding fields in the existing signaling messages, or the original fields are redefined, such as certain reserved fields, and the meaning or the action represented by the original fields is defined and is reserved. In this way, through the improved existing signaling message between the source main node and the source auxiliary node, the indication information for preserving the terminal context can be transferred to the source auxiliary node, so that the connection between the source main node and the terminal is not released. Wherein, the auxiliary node release request is commonly used.

In order to better understand the method for keeping the auxiliary node unchanged provided in the embodiment of the present application, a technical solution of the present application is described below by using a plurality of application examples.

Example one: how to keep SN unchanged without pre-configuration in the conditional switch execution phase

Fig. 4 is a schematic implementation flow chart of a method for keeping a secondary node unchanged in an embodiment of the present application, as shown in fig. 4, where, in a case where a pairing group of a target primary node and a source secondary node is not preconfigured, an overall flow of keeping the secondary node unchanged in a conditional switch execution stage by a terminal includes:

a switching preparation stage:

step 1, a source MN sends a switching request message to a target MN, wherein the switching request message carries a conditional switching instruction, MCG and SCG configuration information, and source SN related information comprises a SN UE XnAP ID of a source SN.

Step 2-3 a, adding a certain SN as an alternative SN to the target MN; the candidate SN added by the target MN here does not include the source SN;

And 4, the target MN replies a switching request confirmation message to the source MN, wherein the switching request confirmation message comprises related information of the target MN and the target SN. The UE context retention indication is not included therein, and the dual connectivity establishment information of the target MN and the source SN is not included.

And step 5, the source MN sends an RRC reconfiguration message to the UE, wherein the RRC reconfiguration message comprises the conditional switching configuration.

And 6, the UE replies a reconfiguration completion message.

And a switching execution stage:

and 7, the UE judges that the condition switching execution condition of the alternative target MN is met.

And 8, after the execution condition of the target MN is met, the UE initiates a random access process to the target MN.

And 9, the UE sends a reconfiguration completion message to the target MN, wherein the reconfiguration completion message comprises MN access information and an optional source SN reservation indication, or the MN access information and an SCG failure indication are carried, or only the MN access information is carried.

And step 10, the target MN decides to keep the source SN according to the instruction in the step 9, initiates an SN adding request process to the source SN to establish double connection, and carries the SN UE XnAP ID of the source SN.

And 11, replying an addition confirmation message by the source SN, and forming a pairing group of the target MN and the source SN after the addition is successful.

Step 12, the target MN sends a handover success message to the source MN, carrying a UE context retention indication, informing the source MN that the SN does not release the connection with the terminal.

And step 13, the source MN sends an SN release request message to the source SN, wherein the SN release request message carries the UE context reservation indication. The source SN is instructed directly by the source MN to preserve the UE context.

And 14, replying an acknowledgement message by the source SN, and not releasing the connection between the terminal and the source SN.

Fig. 5 is a schematic structural diagram of a terminal provided in an embodiment of the present application, as shown in fig. 5, where the terminal includes a memory 501, a transceiver 502, and a processor 503, where:

a memory 501 for storing a computer program; a transceiver 502 for receiving and transmitting data under the control of the processor 503.

Specifically, a transceiver 502 for receiving and transmitting data under the control of a processor 503.

Wherein in fig. 5, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 503 and various circuits of memory represented by memory 501, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 502 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like. The user interface 504 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 503 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 503 in performing operations.

Alternatively, the processor 503 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), which may also employ a multi-core architecture.

The processor is configured to execute any of the methods provided in the embodiments of the present application by invoking a computer program stored in a memory in accordance with the obtained executable instructions. The processor and the memory may also be physically separate.

A processor 503 for reading the computer program in the memory 501 and performing the following operations:

It should be noted that, the electronic device provided in this embodiment of the present application may implement all the method steps implemented in the method embodiment using the terminal as the execution body, and may achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted herein.

Fig. 6 is a schematic structural diagram of a target master node provided in an embodiment of the present application, and as shown in fig. 6, the target master node includes a memory 620, a transceiver 610, and a processor 600; wherein the processor 600 and the memory 620 may also be physically separate.

A memory 620 for storing a computer program; a transceiver 610 for transceiving data under the control of the processor 600.

In particular, the transceiver 610 is used to receive and transmit data under the control of the processor 600.

Wherein in fig. 6, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 600 and various circuits of memory represented by memory 620, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.

The processor 600 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or the processor may employ a multi-core architecture.

The processor 600 is operable to perform any of the methods provided by the embodiments of the present application in accordance with the obtained executable instructions by invoking a computer program stored in the memory 620. The processor and the memory may also be physically separate.

A processor 603 for reading the computer program in the memory 601 and performing the following operations:

receiving first indication information sent by a terminal;

Optionally, the first message is a handover success message.

Optionally, the second message is a secondary node addition request message.

It should be noted that, the electronic device provided in this embodiment of the present application can implement all the method steps implemented in the method embodiment using the target master node as the execution body, and can achieve the same technical effects, and specific details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.

Fig. 7 is a schematic structural diagram of a source master node according to an embodiment of the present application, and as shown in fig. 7, the source master node includes a memory 720, a transceiver 710, and a processor 700; wherein the processor 700 and the memory 720 may also be physically separate.

A memory 720 for storing a computer program; a transceiver 710 for transceiving data under the control of the processor 700.

In particular, the transceiver 710 is used to receive and transmit data under the control of the processor 700.

Wherein in fig. 7, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 700 and various circuits of memory represented by memory 720, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like.

The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.

The processor 700 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or the processor may employ a multi-core architecture.

Processor 700 is operable to perform any of the methods provided by the embodiments of the present application in accordance with the obtained executable instructions by invoking a computer program stored in memory 720. The processor and the memory may also be physically separate.

A processor 703 for reading the computer program in the memory 701 and performing the following operations:

receiving a first message sent by a target master node;

It should be noted that, the electronic device provided in this embodiment of the present application may implement all the method steps implemented in the method embodiment using the source master node as the execution body, and may achieve the same technical effects, and specific details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not described herein.

Fig. 8 is a schematic structural diagram of an apparatus for keeping a secondary node unchanged, which is provided in an embodiment of the present application, where the apparatus is applied to a terminal, as shown in fig. 8, and the apparatus includes:

a first sending module 801, configured to send first indication information to a target primary node, where the first indication information is used to indicate a connection between a reserved terminal and a source secondary node;

Optionally, the apparatus further comprises a first receiving module 802 for:

before the first indication information sent by the first sending module 801 to the target primary node, switching configuration information is received, where the switching configuration information includes one or more pairing groups and does not include a pairing group formed by the target primary node and the source secondary node.

Fig. 9 is a second schematic structural diagram of an apparatus for keeping a secondary node unchanged according to an embodiment of the present application, where the apparatus is applied to a target primary node, as shown in fig. 9, and the apparatus includes:

a second receiving module 901, configured to receive first indication information sent by a terminal;

a second sending module 902, configured to send a first message to a source master node based on the received first indication information; the first message is used for indicating the source auxiliary node to reserve the connection between the terminal and the source auxiliary node through the source main node.

Optionally, the second sending module 902 is specifically configured to, in a process of sending a first message to a source master node based on the received first indication information:

Optionally, the second sending module 902 is further configured to: sending a second message to a source auxiliary node, wherein the second message is used for adding the source auxiliary node to a target main node to form a pairing group of the main node and the auxiliary node;

the second receiving module 901 is further configured to: and determining that the source auxiliary node is successfully added based on the received feedback message of the source auxiliary node.

Optionally, the first message is a handover success message.

Optionally, the second message is a secondary node addition request message.

Fig. 10 is a third schematic structural diagram of an apparatus for keeping a secondary node unchanged according to an embodiment of the present application, where the apparatus is applied to a source primary node, as shown in fig. 10, and includes:

a third receiving module 1001, configured to receive a first message sent by a target master node;

a third sending module 1002, configured to send second indication information to the source auxiliary node based on the received first message;

The method and the device provided in the embodiments of the present application are based on the same application conception, and since the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be noted that, the above device provided in this embodiment of the present application can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.

In another aspect, embodiments of the present application further provide a computer readable storage medium storing a computer program, where the computer program is configured to cause a computer to execute the method for keeping the secondary node unchanged provided in the foregoing embodiments.

It should be noted that, the computer readable storage medium provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted herein.

The computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of terminals may also be different in different systems, for example in a 5G system, a terminal may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and the embodiments of the present application are not limited.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for a terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Multiple-input Multiple-output (Multi Input Multi Output, MIMO) transmissions may each be made between a network device and a terminal device using one or more antennas, and the MIMO transmissions may be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of the root antenna combinations.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method for keeping a secondary node unchanged, applied to a terminal, comprising:

2. The method of keeping the secondary node unchanged according to claim 1, wherein before the first indication information is sent to the target primary node, the method includes:

3. The method of claim 1, wherein the first indication information is sent via an RRC reconfiguration complete message.

4. A method according to any one of claims 1 to 3, wherein the first indication information is indication information indicating that the source secondary node is reserved, or indication information indicating that access to SCG fails, or no SCG related information.

5. A method for maintaining a secondary node unchanged, applied to a target primary node, comprising:

receiving first indication information sent by a terminal;

6. The method of keeping the secondary node unchanged according to claim 5, wherein the sending a first message to the source primary node based on the received first indication information includes:

7. The method for keeping the secondary node unchanged according to claim 5, wherein after the receiving the first indication information sent by the terminal, the method comprises:

8. The method of keeping the secondary node unchanged according to claim 5 or 6, wherein the first message is a handover success message.

9. The method of maintaining a secondary node unchanged according to claim 7, wherein the second message is a secondary node addition request message.

10. A method for maintaining a secondary node unchanged, applied to a source primary node, comprising:

receiving a first message sent by a target master node;

11. The method of claim 10, wherein the second indication information sent to the source secondary node is sent via a secondary node release request.

12. A terminal comprising a memory, a transceiver, and a processor; the method is characterized in that:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

13. The terminal of claim 12, wherein before the first indication information is sent to the target master node, the terminal includes:

14. The terminal of claim 12, wherein the first indication information is transmitted through an RRC reconfiguration complete message.

15. The terminal according to any of claims 12 to 14, wherein the first indication information is indication information indicating that a source secondary node is reserved, or indication information indicating that access to SCG fails, or no SCG related information.

16. A target master node comprising a memory, a transceiver, and a processor; the method is characterized in that:

Receiving first indication information sent by a terminal;

17. The target master node of claim 16, wherein the sending a first message to a source master node based on the received first indication information comprises:

18. The target master node of claim 16, wherein after the receiving the first indication information sent by the terminal, the target master node comprises:

19. The target host node according to claim 16 or 17, wherein the first message is a handover success message.

20. The target primary node of claim 18, wherein the second message is a secondary node add request message.

21. A source master node comprising a memory, a transceiver, and a processor; the method is characterized in that:

receiving a first message sent by a target master node;

22. The source master node of claim 21 wherein the second indication information sent to the source secondary node is sent by a secondary node release request.

23. An apparatus for keeping a secondary node unchanged, applied to a terminal, comprising:

24. An apparatus for maintaining a secondary node unchanged, for use with a target primary node, comprising:

25. An apparatus for maintaining a secondary node unchanged, for use with a source primary node, comprising:

26. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for causing a computer to execute the method of keeping the secondary node unchanged according to any one of claims 1 to 4, or the method of keeping the secondary node unchanged according to any one of claims 5 to 9, or the method of keeping the secondary node unchanged according to any one of claims 10 to 11.