CN111107591B

CN111107591B - Method and equipment for switching

Info

Publication number: CN111107591B
Application number: CN201811260960.6A
Authority: CN
Inventors: 许萌; 梁靖; 刘爱娟
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2021-11-02
Anticipated expiration: 2038-10-26
Also published as: CN111107591A

Abstract

The invention relates to the technical field of wireless communication, in particular to a method and equipment for switching, which are used for solving the problem of avoiding switching failure in a scene of establishing double connection or multiple connections in the switching process. The method comprises the steps that a source main node receives MCG configuration information of a target main node and SCG configuration information of at least one target auxiliary node, wherein the MCG configuration information and the SCG configuration information of the target auxiliary node are sent by the target main node through one or more switching commands; and the source main node determines a target switching command which needs to be sent to the terminal according to the one or more switching commands and sends the target switching command to the terminal. By adopting the mode of the embodiment of the invention, the switching failure can be avoided under the scene of establishing double connection or multi-connection in the switching process, and the system reliability is improved.

Description

Method and equipment for switching

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for performing handover.

Background

In an EN-DC (E-UTRA NR Dual Connectivity, E-UTRAN NR Dual Connectivity) scenario, a UE (User Equipment) performs Dual linking. And the UE establishes connection with the two access nodes simultaneously so as to improve the data output rate.

In an LTE (Long Term Evolution) system, an access network is composed of a plurality of access nodes, the access nodes are connected to an EPC (Evolved Packet Core) through an S1 interface, the access nodes are connected to each other through an X2 interface, and in order to support higher data throughput, a UE (User Equipment) may establish network connection with the plurality of access nodes at the same time. In the 5G system, similarly to the dual connectivity of the LTE system, the dual connectivity scenario of the UE is also supported; the nodes to which the UE accesses are divided into an MN (Master Node) and an SN (Secondary Node). When the MN determines that the UE needs to be switched according to the measurement report of the UE, the MN needs to switch the UE from the currently accessed MN to a target MN with better quality, the target MN can determine whether to configure a new SN or maintain the current SN for the UE according to the measurement report of the UE, and when the target MN determines to establish SN connection or maintain the original SN connection for the UE, the target MN needs to establish connection with the target SN.

However, this means that the handover preparation delay is long, and the configuration information carried in the handover process is large, which may result in a handover failure. How to avoid handover failure in a scenario of establishing dual connection or multi-connection in a handover process is a technical problem to be urgently solved by technical personnel in the field.

Disclosure of Invention

The invention provides a switching method and equipment, which are used for solving the problem of avoiding switching failure in a scene of establishing double connection or multiple connections in the switching process.

Based on the foregoing problem, in a first aspect, an embodiment of the present invention provides a method for performing handover, including:

the method comprises the steps that a source main node receives MCG configuration information of a target main node and SCG configuration information of at least one target auxiliary node, wherein the MCG configuration information and the SCG configuration information of the target auxiliary node are sent by the target main node through one or more switching commands;

and the source main node determines a target switching command which needs to be sent to the terminal according to the one or more switching commands and sends the target switching command to the terminal.

Optionally, the target handover command is a first handover command that only includes MCG configuration information of the target master node; or

The target switching command is a second switching command which comprises MCG configuration information of the target main node and SCG configuration information of part of target auxiliary nodes or all target auxiliary nodes.

Optionally, the receiving, by the source master node, a plurality of handover commands sent by the target master node includes:

the source main node receives a first switching command which is sent by the target main node and only contains MCG configuration information of the target main node; and

the source main node receives a second switching command which is sent by the target main node and contains MCG configuration information of the target main node and SCG configuration information set of the target auxiliary node;

the SCG configuration information set of the target auxiliary node is a set formed by SCG configuration information of part of target auxiliary nodes or all target auxiliary nodes.

Optionally, the determining, by the source master node, a target handover command that needs to be sent to the terminal includes:

the source master node selecting the first handover command from the plurality of handover commands as the target handover command; or

The source master node selects a second handover command from the plurality of handover commands as the target handover command.

Optionally, when the source master node receives a handover command sent by the target master node, the handover command includes MCG configuration information of the target master node and SCG configuration information of all target secondary nodes.

the source main node generates a first switching command according to the MCG configuration information of the target main node, and takes the first switching command as the target switching command; or

And the source main node generates a second switching command according to the MCG configuration information of the target main node and the SCG configuration information of part of or all of the target auxiliary nodes, and takes the second switching command as the target switching command.

Optionally, after the source master node determines a target handover command that needs to be sent to the terminal, perform some or all of the following steps:

step 1, the source main node sends indication information indicating whether SCG configuration information of a target auxiliary node is not configured to the terminal and/or the target main node;

step 2, the source main node sends identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured to the terminal and/or the target main node;

and 3, the source main node sends the configured identification information corresponding to the SCG configuration information of the target auxiliary node to the target main node.

Optionally, the source master node determines a target handover command to be sent to the terminal according to the following manner:

and the source main node determines a target switching command which needs to be sent to the terminal according to the one or more switching commands and the switching auxiliary information.

Optionally, the handover assistance information includes part or all of the following information:

measurement reports, handover preparation delay and air interface resources reported by the terminal.

Optionally, the source master node receives the handover command sent by the target master node according to the following manner:

the source main node receives the one or more switching commands sent by the target main node through interface messages; the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of whether the handover command includes SCG configuration information of the target secondary node.

In a second aspect, an embodiment of the present invention provides a method for performing handover, where the method includes:

a terminal receives a target switching command sent by a source main node; the target switching command is determined by the source main node according to MCG configuration information of the target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switches;

and the terminal accesses a node corresponding to the configuration information contained in the target switching command according to the target switching command.

Optionally, the method further includes:

the terminal receives indication information which is sent by the source main node and indicates that SCG configuration information of a target auxiliary node is not configured; and/or

And the terminal receives identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured and sent by the source main node.

Optionally, after the terminal accesses the node corresponding to the configuration information included in the target handover command according to the target handover command, the method further includes:

the terminal sends a configuration completion message to the target main node;

wherein the configuration completion message includes part or all of the following information:

indicating information indicating whether the SCG configuration information of the target auxiliary node is not configured, identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured, and identification information corresponding to the SCG configuration information of the target auxiliary node which is configured.

the target main node determines MCG configuration information of the target main node configured to the terminal and SCG configuration information of at least one target auxiliary node;

the target main node sends MCG configuration information of the target main node and SCG configuration information of at least one target auxiliary node to a source main node through one or more switching commands, so that the source main node determines a target switching command which needs to be sent to the terminal according to the one or more switching commands.

Optionally, the sending, by the target master node, the MCG configuration information of the target master node and the SCG configuration information of the at least one target secondary node to the source master node through the multiple handover commands includes:

the target main node sends a first switching command only containing MCG configuration information of the target main node to the source main node; and

the target main node sends a second switching command containing MCG configuration information of the target main node and SCG configuration information set of the target auxiliary node to the source main node;

the SCG configuration information set of the target auxiliary node is a set formed by SCG configuration information of part of or all target auxiliary nodes.

Optionally, the sending, by the target master node, the MCG configuration information of the target master node and the SCG configuration information of the at least one target secondary node to the source master node through a handover command includes:

and the target main node sends a switching command containing the MCG configuration information of the target main node and the SCG configuration information of at least one target auxiliary node to the source main node.

Optionally, after the target master node sends the MCG configuration information of the target master node and the SCG configuration information of the at least one target secondary node to the source master node through one or more handover commands, the method further includes:

the target main node receives part or all of the following information sent by the source main node:

the target main node receives a configuration completion message sent by the terminal; wherein the configuration completion message includes part or all of the following information: indicating information indicating whether the SCG configuration information of the target auxiliary node is not configured, identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured, and identification information corresponding to the SCG configuration information of the target auxiliary node which is configured.

Optionally, the target master node sends the handover command to the source master node according to the following manner:

the target main node sends the one or more switching commands to the source main node through interface messages; the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of whether the handover command includes SCG configuration information of the target secondary node.

In a fourth aspect, an embodiment of the present invention provides a provenance master node, including: a processor, memory, transceiver;

a processor for reading the program in the memory and executing:

receiving MCG configuration information of a target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switching commands;

and determining a target switching command which needs to be sent to the terminal according to the one or more switching commands, and sending the target switching command to the terminal.

In a fifth aspect, an embodiment of the present invention provides a terminal, including: a processor, memory, transceiver;

a processor for reading the program in the memory and executing:

receiving a target switching command sent by a source main node; the target switching command is determined by the source main node according to MCG configuration information of the target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switches;

and accessing a node corresponding to the configuration information contained in the target switching command according to the target switching command.

In a sixth aspect, an embodiment of the present invention provides a target master node, including: a processor, memory, transceiver;

a processor for reading the program in the memory and executing:

determining MCG configuration information of a target main node configured to the terminal and SCG configuration information of at least one target auxiliary node;

and sending the MCG configuration information of the target main node and the SCG configuration information of at least one target auxiliary node to a source main node through one or more switching commands, so that the source main node determines a target switching command which needs to be sent to the terminal according to the one or more switching commands.

In a seventh aspect, an embodiment of the present invention provides a provenance master node, including:

the system comprises a first receiving module, a second receiving module and a third receiving module, wherein the first receiving module is used for receiving MCG configuration information of a target main node and SCG configuration information of at least one target auxiliary node which are sent by the target main node through one or more switching commands;

and the first sending module is used for determining a target switching command which needs to be sent to the terminal according to the one or more switching commands and sending the target switching command to the terminal.

In an eighth aspect, an embodiment of the present invention provides a terminal, including:

the second receiving module is used for receiving a target switching command sent by the source main node; the target switching command is determined by the source main node according to MCG configuration information of the target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switches;

and the access module is used for accessing the node corresponding to the configuration information contained in the target switching command according to the target switching command.

In a ninth aspect, an embodiment of the present invention provides a target master node, including:

the system comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining MCG configuration information of a target main node configured to a terminal and SCG configuration information of at least one target auxiliary node;

a second sending module, configured to send, to a source master node, the MCG configuration information of the target master node and the SCG configuration information of at least one target secondary node through one or more switching commands, so that the source master node determines, according to the one or more switching commands, a target switching command that needs to be sent to the terminal.

In a tenth aspect, an embodiment of the present invention is a computer-readable medium, on which a computer program is stored, which when executed by a processor implements the steps of the method according to the first, second or third aspect.

After receiving the MCG configuration information of the target main node and the SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switching commands, the source main node determines a target switching command to be sent to the terminal according to the one or more switching commands and sends the target switching command to the terminal. By adopting the mode of the embodiment of the invention, after the source main node receives the switching command, the source main node does not directly forward the configuration information carried in the switching command to the terminal, but determines the target switching command and sends the target switching command to the terminal.

Drawings

FIG. 1 is a schematic diagram of a system for performing handover according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a first embodiment of a handover process;

FIG. 3 is a flowchart illustrating a second embodiment of handover;

FIG. 4 is a flowchart illustrating a third embodiment of the present invention;

FIG. 5 is a flowchart illustrating a fourth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first provenance master node according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first target master node according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a second slave-master node according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second terminal according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a second target host node according to an embodiment of the present invention;

FIG. 12 is a flowchart of a first method for performing a handover according to an embodiment of the present invention;

FIG. 13 is a flowchart illustrating a second method for performing a handover in accordance with an embodiment of the present invention;

fig. 14 is a flowchart of a third method for performing handover according to an embodiment of the present invention.

Detailed Description

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) In the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning.

(2) In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(3) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The network architecture and the service scenario described in the embodiment of the present invention are for more clearly illustrating the technical solution of the embodiment of the present invention, and do not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by those skilled in the art that the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.

A terminal of an embodiment of the present invention may communicate with a core network via an access network node, and a terminal may refer to a UE, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal in a future 5G network, etc. In an actual network, a plurality of terminals may coexist, and details thereof are not described herein.

AN Access Network (Access Network, AN) entity, which may also be referred to as a Radio Access Network (R) entity, is hereinafter referred to as AN Access Network entity (R) AN entity, and is mainly responsible for providing a wireless connection for a terminal, and ensuring reliable transmission of uplink and downlink data of the terminal. The Access network entity may be a next generation Base Station (gNB) in a 5G System, which may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, a Base Station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) System, or an evolved Node B (eNB) in a Long Term Evolution (LTE) System, etc.

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, a system for performing handover according to an embodiment of the present invention includes: a source host node 10, a target host node 11 and a terminal 12.

The source master node 10 is configured to receive MCG configuration information of the target master node and SCG configuration information of at least one target secondary node, which are sent by the target master node through one or more switching commands; and determining a target switching command which needs to be sent to the terminal according to the one or more switching commands, and sending the target switching command to the terminal.

The target master node 11 is used for determining MCG configuration information of the target master node configured to the terminal and SCG configuration information of at least one target auxiliary node; and sending the MCG configuration information of the target main node and the SCG configuration information of at least one target auxiliary node to a source main node through one or more switching commands, so that the source main node determines a target switching command which needs to be sent to the terminal according to the one or more switching commands.

The terminal 12 is configured to receive a target switching command sent by a source host node; the target switching command is determined by the source main node according to MCG configuration information of the target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switches; and accessing a node corresponding to the configuration information contained in the target switching command according to the target switching command.

The source main node is a main node accessed before the terminal is switched, and the source auxiliary node is an auxiliary node accessed before the terminal is switched; the target main node is a main node accessed after the terminal is switched, and the target auxiliary node is an auxiliary node accessed after the terminal is switched.

Before the terminal is switched, the source host node performs switching judgment according to a measurement report reported by the terminal, and sends a switching request message to the target host node; the handover request message includes a measurement report reported by the terminal and context information of the terminal in the source host node.

After the target main node receives the switching request message sent by the source main node, the target main node accepts and judges whether the terminal is configured with double connection or multiple connection or not according to the measurement report information of the terminal, and if the target main node determines that the terminal is configured with double connection or multiple connection, the target main node determines a target auxiliary node accessed after the terminal is switched;

specifically, the target master node sends an auxiliary node adding request to the target auxiliary node;

and the target auxiliary node judges and configures according to the auxiliary node adding request message sent by the target main node, and if the target auxiliary node receives the configuration request sent by the target main node, the target auxiliary node sends an auxiliary node adding request confirmation message to the target main node.

It should be noted that the terminal may establish connection with multiple secondary nodes, and the number of the target secondary nodes added by the target master node is one or more.

After the target auxiliary node is determined, the target main node sends the configuration information containing the target main node and the SCG configuration information of at least one target auxiliary node to the source main node through one or more switching commands.

Correspondingly, the source main node receives a switching command sent by the target main node; or the source main node receives a plurality of switching commands sent by the target main node.

When the target master node sends one switching command, the switching command includes configuration information of the target master node and SCG configuration information of all target auxiliary nodes configured for the terminal.

When the target main node sends a plurality of switching commands, the types of the switching commands are a first switching command and a second switching command;

wherein, the first switching command only contains MCG configuration information of the target main node;

the second switching command comprises MCG configuration information of the target main node and SCG configuration information set of the target auxiliary node;

It should be noted here that when there are a plurality of target secondary nodes configured for the terminal, the number of the second handover commands may also be multiple;

for example, the target primary node configured for the terminal is node a, and the target secondary nodes are node B and node C; when a switching command is sent by a target main node, the switching command comprises MCG configuration information of a node A, SCG configuration information of a node B and SCG configuration information of a node C;

when a plurality of switching commands are sent by a target main node, the first switching command only contains MCG configuration information of a node A; the number of the second switching commands may be 3, and the second switching commands respectively include: a second switching command containing MCG configuration information of the node A and SCG configuration information of the node B; a second switching command containing MCG configuration information of the node A and SCG configuration information of the node C; and a second switching command including MCG configuration information of the node A, SCG configuration information of the node B and SCG configuration information of the node C.

In the implementation, the target main node sends one or more switching commands to the source main node through interface information;

correspondingly, the source main node receives the one or more switching commands sent by the target main node through the interface message.

The following describes the methods for performing handover with respect to the number of handover commands transmitted by the target master node.

In case one, the target master node sends multiple handover commands to the source master node.

Optionally, the target master node sends multiple handover commands to the source master node through the interface message, where the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of whether the handover command includes SCG configuration information of the target secondary node.

In implementation, the source master node determines the target handover command according to the following manner:

in a first mode, the source main node selects the first switching command from the plurality of switching commands as the target switching command;

in the first embodiment, the source master node directly selects the first handover command from the plurality of handover commands as the target handover command, and passes the selected first handover command to the terminal.

Optionally, after determining to send the first switching command to the terminal, the source master node performs part or all of the following steps:

step 1, the source main node sends indication information indicating that SCG configuration information of a target auxiliary node is not configured to the terminal and/or the target main node;

correspondingly, the terminal and/or the target main node receives the indication information which is sent by the source main node and indicates that the SCG configuration information of the target auxiliary node is not configured.

correspondingly, the terminal and/or the target main node receives the identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured and sent by the source main node.

For example, the target primary node is node a, and the target secondary nodes are node B and node C; if the first switching command is used as a target switching command;

aiming at the step 1, the source main node sends indication information indicating that SCG configuration information of the target auxiliary node is not configured to the terminal and/or the target main node;

and aiming at the step 2, the source main node sends identification information corresponding to the SCG configuration information of the node B and identification information corresponding to the SCG configuration information of the node C to the terminal and/or the target main node.

After receiving a first switching command, a terminal accesses a node corresponding to configuration information contained in the first switching command.

Specifically, the terminal accesses the target host node according to the MCG configuration information of the target host node included in the first switching command.

In addition, after the terminal is accessed to the target main node, the terminal sends a configuration completion message to the target main node;

wherein, the configuration completion message contains the following part or all information:

indicating information that the SCG configuration information of the target auxiliary node is not configured, and identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured.

Correspondingly, after receiving the configuration completion message sent by the terminal, the target master node determines the SCG configuration information of the target auxiliary node which is not configured to the terminal; the reconfiguration message containing the SCG configuration information of the target auxiliary node which is not configured can be sent to the terminal;

and after receiving the reconfiguration message, the terminal accesses a target auxiliary node corresponding to the SCG configuration information in the reconfiguration message according to the SCG configuration information in the reconfiguration message.

It should be noted here that, because the terminal only accesses the target primary node, the reconfiguration message includes SCG configuration information of all target secondary nodes, and the terminal accesses all target secondary nodes after receiving the reconfiguration message.

And in a second mode, the source main node selects one second switching command from the plurality of switching commands as the target switching command.

In the second embodiment, the source master node directly selects one second handover command from the plurality of handover commands as the target handover command, and passes the selected second handover command to the terminal.

Optionally, after determining to send the second handover command to the terminal, the source master node performs part or all of the following steps:

correspondingly, the terminal and/or the target main node receives the indication information which is sent by the source main node and indicates whether the SCG configuration information of the target auxiliary node is not configured.

For example, if the second handover command includes part of the SCG configuration information of the target secondary node, the source primary node sends, to the terminal and/or the target primary node, indication information indicating that the SCG configuration information of the target secondary node is not configured; and if the second switching command contains the SCG configuration information of all the target auxiliary nodes, the source main node sends indication information indicating that no SCG configuration information of the target auxiliary nodes is not configured to the terminal and/or the target main node.

It should be noted that, if the second handover command includes part of the SCG configuration information of the target secondary node, the source primary node sends, to the terminal and/or the target primary node, identification information corresponding to the SCG configuration information of the target secondary node that is not configured.

Step 3, the source main node sends identification information corresponding to the SCG configuration information of the configured target auxiliary node to the target main node;

correspondingly, the target main node receives the identification information corresponding to the configured SCG configuration information of the target auxiliary node sent by the source main node.

For example, the target primary node is node a, and the target secondary nodes are node B and node C; if the second switching command is taken as a target switching command; the second switching command comprises configuration information of the MCG of the target main node A and SCG configuration information of the target auxiliary node B;

aiming at the step 2, the source main node sends identification information corresponding to the SCG configuration information of the target auxiliary node C which is not configured to the terminal and/or the target main node;

and aiming at the step 3, the source main node sends the configured identification information corresponding to the SCG configuration information of the target auxiliary node B to the target main node.

After receiving the second switching command, the terminal accesses a node corresponding to the configuration information contained in the second switching command.

Specifically, the terminal accesses the target master node according to the MCG configuration information of the target master node in the second switching command, and accesses the target secondary node corresponding to the SCG configuration information according to the SCG configuration information included in the second switching command.

It should be noted that the second handover command includes a plurality of SCG configuration information, and the terminal accesses the target secondary node corresponding to each SCG configuration information according to each SCG configuration information.

In addition, after accessing the node corresponding to the configuration information contained in the second switching command, the terminal sends a configuration completion message to the target master node;

Further, the source host node determines a target switching command to be sent to the terminal according to the switching commands and the switching auxiliary information.

When selecting a target handover command from among a plurality of handover commands, the source master node selects from among the plurality of handover commands based on the handover assistance information.

Specifically, when determining that the following partial or all conditions are satisfied, the source master node determines to send a first switching command including only configuration information of the target master node MCG to the terminal:

the method comprises the following steps that 1, a measurement result of a target main node is smaller than a first threshold within preset time;

condition 2, the time delay of the switching preparation is larger than a second threshold;

and in condition 3, the air interface resource is smaller than a third threshold.

When the source main node determines that the following partial or all conditions are met, determining to send a second switching command containing the configuration information of the target main node MCG and the configuration information of all SCGs of the target auxiliary node to the terminal:

the method comprises the following steps that 1, the measurement result of a target main node is greater than a fourth threshold within preset time;

condition 2, the time delay of the switching preparation is smaller than a fifth threshold;

and in condition 3, the air interface resource is greater than a sixth threshold.

When the SCG configuration information of a plurality of target auxiliary nodes is contained, the source main node determines to send a second switching command containing the configuration information of the MCG of the target main node and the configuration information of the SCG of part of the target auxiliary nodes to the terminal when determining that the following partial or all conditions are met:

the method comprises the following steps that 1, a measurement result of a target main node is smaller than a seventh threshold and larger than an eighth threshold within preset time;

condition 2, the switching preparation delay is greater than a ninth threshold and less than a tenth threshold;

and in condition 3, the air interface resource is smaller than the eleventh threshold and larger than the twelfth threshold.

As shown in fig. 2, in the embodiment of the present invention, when a target master node sends multiple handover commands to a source master node, a first method for performing handover is provided; the following description is given by way of example to configure a target primary node and a target secondary node for a terminal.

Step 201, the terminal reports the measurement report to the source host node.

Step 202, the source host node determines to execute the handover and sends a handover request message to the target host node.

And 203, the target master node determines the SCG configuration information of the target auxiliary node configured for the terminal and completes the adding process of the target auxiliary node.

And step 204, the target master node generates two switching commands, wherein the first switching command only contains the MCG configuration information of the target master node, and the second switching command contains the MCG configuration information of the target master node and the SCG configuration information of the target slave node.

Step 205, the target master node sends both switching commands to the source master node;

optionally, the target master node sends the two handover commands to the source master node through an interface message, where the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of whether the handover command includes SCG configuration information of the target secondary node.

Step 206, the source host node receives two switching commands sent by the target host node, and the source host node selects a first switching command according to the switching auxiliary information and sends the first switching command to the terminal; the first switching command includes MCG configuration information, and/or the switching command carries indication information indicating that the SCG configuration information of the target secondary node is not configured, and/or identification information corresponding to the SCG configuration information of the target secondary node that is not configured.

Wherein the handover assistance information includes part or all of the following information:

measurement report, handover preparation delay, air interface resources.

And step 207, the terminal completes configuration according to the first switching command and accesses the target main node.

Step 208, the terminal sends a configuration completion message to the target host node;

the configuration completion message includes indication information indicating that the SCG configuration information of the target secondary node is not configured and/or identification information corresponding to the SCG configuration information of the target secondary node which is not configured.

And 209, the target main node judges that the terminal only completes the access of the target main node through the identification information carried in the configuration completion message, and the target main node sends a reconfiguration message containing the SCG configuration information of the target auxiliary node which is not configured to the terminal.

And step 210, the terminal receives the reconfiguration message and completes configuration of the access target auxiliary node.

As shown in fig. 3, in the embodiment of the present invention, when a target master node sends multiple handover commands to a source master node, a second method for performing handover is provided; the following description is given by way of example to configure a target primary node and a target secondary node for a terminal.

And 301, the terminal reports the measurement report to the source host node.

Step 302, the source master node determines to execute the handover and sends a handover request message to the target master node.

Step 303, the target master node determines the SCG configuration information of the target secondary node configured for the terminal, and completes the adding process of the target secondary node.

And step 304, the target master node generates two switching commands, wherein the first switching command only contains the MCG configuration information of the target master node, and the second switching command contains the MCG configuration information of the target master node and the SCG configuration information of the target auxiliary node.

Step 305, the target master node sends both switching commands to the source master node;

Step 306, the source host node receives two switching commands sent by the target host node, and the source host node selects a second switching command according to the switching auxiliary information and sends the second switching command to the terminal; the second handover command includes MCG configuration information of the target master node and SCG configuration information of the target slave node, and/or the handover command includes indication information indicating that no SCG configuration information of the target slave node is not configured.

measurement report, handover preparation delay, air interface resources.

And 307, the terminal completes configuration according to the second switching command and accesses the target main node and the target auxiliary node.

308, the terminal sends a configuration completion message to the target host node;

the configuration completion message includes indication information indicating that there is no SCG configuration information of the target secondary node that is not configured, and/or identification information corresponding to the configured SCG configuration information of the target secondary node.

Step 309, the target master node judges that the terminal completes the access of the target master node and the target auxiliary node through the identification information carried in the configuration completion message.

And in case two, the target main node sends a switching command to the source main node.

The switching command includes MCG configuration information of the target master node and SCG configuration information of all target slave nodes.

Optionally, the target master node sends a handover command to the source master node through an interface message, where the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of whether the handover command includes SCG configuration information of the target secondary node.

After receiving the switching command, the source host node determines a target switching command to be sent to the terminal according to the following modes:

in a first mode, the source main node generates a first switching command according to the MCG configuration information of the target main node, and takes the first switching command as the target switching command;

in implementation, after receiving the MCG configuration information sent by the target master node and the SCG configuration information of the target secondary node, the source master node generates a first switching command only according to the MCG configuration information, that is, the first switching command only includes the MCG configuration information; and the source main node sends the first switching command only containing the MCG configuration information to the terminal as a target switching command.

For example, the target primary node is node a, and the target secondary nodes are node B and node C; if the source main node generates a first switching command according to the MCG configuration information of the target main node, taking the first switching command as a target switching command;

And in a second mode, the source main node generates a second switching command according to the MCG configuration information of the target main node and the SCG configuration information of part of or all of the target auxiliary nodes, and takes the second switching command as the target switching command.

In implementation, after receiving the MCG configuration information and the SCG configuration information of the target secondary node sent by the target primary node, the source primary node generates a second handover command according to the MCG configuration information and the SCG configuration information of part of or all of the target secondary nodes, that is, the second handover command includes the MCG configuration information and the SCG configuration information of part of or all of the target secondary nodes; and the source main node takes a second switching command containing MCG configuration information and SCG configuration information of part of or all of the target auxiliary nodes as a target switching command and sends the target switching command to the terminal.

For example, the target primary node is node a, and the target secondary nodes are node B and node C; if the source main node generates a second switching command according to the MCG configuration information of the target main node A and the SCG configuration information of the target auxiliary node B, taking the second switching command as a target switching command;

further, the source host node determines a target switching command to be sent to the terminal according to the switching command and the switching auxiliary information.

When the source master node generates the target handover command, it determines to generate the first handover command or the second handover command based on the handover assistance information.

Specifically, when determining that the following partial or all conditions are met, the source master node determines to generate a first switching command only including configuration information of the target master node MCG and sends the first switching command to the terminal:

When the source main node determines that the following partial or all conditions are met, determining to generate a second switching command containing the configuration information of the target main node MCG and the configuration information of all SCGs of the target auxiliary node, and sending the second switching command to the terminal:

When the SCG configuration information of a plurality of target auxiliary nodes is contained, the source main node determines to generate a second switching command containing the configuration information of the MCG of the target main node and the configuration information of the SCG of part of the target auxiliary nodes and sends the second switching command to the terminal when determining that the following partial or all conditions are met:

As shown in fig. 4, in the embodiment of the present invention, when a target master node sends a handover command to a source master node, a first method for performing handover is provided; the following description is given by way of example to configure a target primary node and a target secondary node for a terminal.

Step 401, the terminal reports the measurement report to the source host node.

Step 402, the source master node determines to execute the handover and sends a handover request message to the target master node.

And step 403, the target master node determines the SCG configuration information of the target secondary node configured for the terminal, and completes the adding process of the target secondary node.

Step 404, the target master node generates a handover command, where the handover command includes MCG configuration information of the target master node and SCG configuration information of all target secondary nodes.

Step 405, the target master node sends a switching command to the source master node;

optionally, the target master node sends the handover command to the source master node through an interface message, where the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of SCG configuration information of the target secondary node included in the handover command.

Step 406, after the source host node receives the switching command sent by the target host node, the source host node determines to generate a first switching command only containing the MCG configuration information according to the switching auxiliary information; and/or the first switching command carries indication information indicating that the SCG configuration information of the target auxiliary node is not configured and/or identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured.

measurement report, handover preparation delay, air interface resources.

Step 407, the source master node sends the first handover command to the terminal.

And step 408, the terminal completes configuration according to the first switching command and accesses the target main node.

Step 409, the terminal sends a configuration completion message to the target host node;

And step 410, the target main node judges that the terminal only completes the access of the target main node through the identification information carried in the configuration completion message, and the target main node sends a reconfiguration message containing the SCG configuration information of the target auxiliary node which is not configured to the terminal.

Step 411, the terminal receives the reconfiguration message and completes configuring the access target secondary node.

As shown in fig. 5, in the embodiment of the present invention, when a target master node sends a handover command to a source master node, a second method for performing handover is provided; the following description is given by way of example to configure a target primary node and a target secondary node for a terminal.

And step 501, the terminal reports the measurement report to the source host node.

Step 502, the source master node determines to execute the handover and sends a handover request message to the target master node.

Step 503, the target master node determines the SCG configuration information of the target secondary node configured for the terminal, and completes the adding process of the target secondary node.

Step 504, the target master node generates a handover command, where the handover command includes MCG configuration information of the target master node and SCG configuration information of all target secondary nodes.

Step 505, the target master node sends a switching command to the source master node;

Step 506, after the source host node receives the switching command sent by the target host node, the source host node determines to generate a second switching command containing MCG configuration information and SCG configuration information according to the switching auxiliary information; and/or the second handover command includes indication information indicating that no SCG configuration information of the target secondary node is unconfigured.

measurement report, handover preparation delay, air interface resources.

And step 507, the source main node sends the second switching command to the terminal.

And step 508, the terminal completes configuration according to the second switching command and accesses the target main node and the target auxiliary node.

Step 509, the terminal sends a configuration completion message to the target host node;

And step 510, the target master node judges that the terminal completes the access of the target master node and the target auxiliary node through the identification information carried in the configuration completion message.

As shown in fig. 6, a provenance node according to an embodiment of the present invention includes: a processor 600, a memory 601, a transceiver 602, and a bus interface.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 601 may store data used by the processor 1000 in performing operations. The transceiver 603 is used for receiving and transmitting data under the control of the processor 600.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 600 and various circuits of memory represented by memory 601 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 600 is responsible for managing the bus architecture and general processing, and the memory 601 may store data used by the processor 600 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to the processor 600, or implemented by the processor 600. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 600. The processor 600 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that may implement or perform the methods, steps or logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 601, and the processor 600 reads the information in the memory 601 and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 600 is configured to read the program in the memory 601 and execute:

Optionally, the processor 600 is specifically configured to:

receiving a first switching command which is sent by the target main node and only contains MCG configuration information of the target main node; and

receiving a second switching command which is sent by the target main node and contains MCG configuration information of the target main node and SCG configuration information set of the target auxiliary node;

Optionally, the processor 600 is specifically configured to:

selecting the first handover command from the plurality of handover commands as the target handover command; or

Selecting a second handover command from the plurality of handover commands as the target handover command.

Optionally, the processor 600 is specifically configured to:

generating a first switching command according to the MCG configuration information of the target main node, and taking the first switching command as the target switching command; or

And generating a second switching command according to the MCG configuration information of the target main node and the SCG configuration information of part of or all of the target auxiliary nodes, and taking the second switching command as the target switching command.

Optionally, the processor 600 is specifically configured to:

after determining a target handover command to be sent to the terminal, performing some or all of the following steps:

step 1, sending indication information indicating whether SCG configuration information of a target auxiliary node is not configured to the terminal and/or the target main node;

step 2, sending identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured to the terminal and/or the target main node;

and 3, sending the configured identification information corresponding to the SCG configuration information of the target auxiliary node to the target main node.

Optionally, the processor 600 is specifically configured to:

and determining a target switching command which needs to be sent to the terminal according to the one or more switching commands and the switching auxiliary information.

Optionally, the processor 600 is specifically configured to:

receiving a switching command sent by the target main node according to the following modes:

receiving the one or more switching commands sent by the target main node through interface messages; the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of whether the handover command includes SCG configuration information of the target secondary node.

As shown in fig. 7, a terminal according to an embodiment of the present invention includes: a processor 700, a memory 701, a transceiver 702, and a bus interface.

The processor 700 is responsible for managing the bus architecture and general processing, and the memory 701 may store data used by the processor 1000 in performing operations. The transceiver 703 is used for receiving and transmitting data under the control of the processor 700.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 700, and various circuits, represented by memory 701, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 701 may store data used by the processor 700 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to the processor 700, or implemented by the processor 700. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 700. The processor 700 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that may implement or perform the methods, steps or logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 701, and the processor 700 reads the information in the memory 701, and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 700 is configured to read the program in the memory 701 and execute:

Optionally, the processor 700 is further configured to:

receiving indication information which is sent by the source main node and indicates that SCG configuration information of a target auxiliary node is not configured; and/or

And receiving identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured and sent by the source main node.

Optionally, the processor 700 is further configured to:

after accessing a node corresponding to the configuration information contained in the target switching command according to the target switching command, sending a configuration completion message to the target main node;

As shown in fig. 8, a target master node according to an embodiment of the present invention includes: a processor 800, a memory 801, a transceiver 802, and a bus interface.

The processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 may store data used by the processor 1000 in performing operations. The transceiver 803 is used for receiving and transmitting data under the control of the processor 800.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 800 and various circuits of memory represented by memory 801 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 may store data used by the processor 800 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to processor 800, or implemented by processor 800. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 800. The processor 800 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 801, and the processor 800 reads the information in the memory 801 and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 800 is configured to read the program in the memory 801 and execute:

Optionally, the processor 800 is specifically configured to:

sending a first switching command only containing MCG configuration information of the target main node to the source main node; and

sending a second switching command containing the MCG configuration information of the target main node and the SCG configuration information set of the target auxiliary node to the source main node;

Optionally, the processor 800 is specifically configured to:

and sending a switching command containing the MCG configuration information of the target main node and the SCG configuration information of at least one target auxiliary node to the source main node.

Optionally, the processor 800 is further configured to:

after sending the MCG configuration information of the target master node and the SCG configuration information of at least one target secondary node to a source master node through one or more handover commands, receiving part or all of the following information sent by the source master node:

Optionally, the processor 800 is further configured to:

after transmitting the MCG configuration information of the target main node and the SCG configuration information of at least one target auxiliary node to a source main node through one or more switching commands, receiving a configuration completion message transmitted by the terminal; wherein the configuration completion message includes part or all of the following information: indicating information indicating whether the SCG configuration information of the target auxiliary node is not configured, identification information corresponding to the SCG configuration information of the target auxiliary node which is not configured, and identification information corresponding to the SCG configuration information of the target auxiliary node which is configured.

Optionally, the processor 800 is specifically configured to:

a handover command sent to the source master node according to the following:

sending the one or more switching commands to the source master node through an interface message; the interface message further includes identification information of the target secondary node included in the handover command, and/or indication information of whether the handover command includes SCG configuration information of the target secondary node.

As shown in fig. 9, a second provenance-master node according to an embodiment of the present invention includes:

a first receiving module 901, configured to receive MCG configuration information of a target master node and SCG configuration information of at least one target secondary node, where the MCG configuration information is sent by the target master node through one or more handover commands;

a first sending module 902, configured to determine, according to the one or more handover commands, a target handover command that needs to be sent to the terminal, and send the target handover command to the terminal.

Optionally, the first receiving module 901 is specifically configured to:

Optionally, the first sending module 902 is specifically configured to:

Optionally, the first receiving module 901 is specifically configured to:

As shown in fig. 10, a second terminal according to an embodiment of the present invention includes:

a second receiving module 1001, configured to receive a target handover command sent by a source host node; the target switching command is determined by the source main node according to MCG configuration information of the target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switches;

an accessing module 1002, configured to access, according to the target handover command, a node corresponding to the configuration information included in the target handover command.

Optionally, the second receiving module 1001 is further configured to:

Optionally, the access module 1002 is further configured to:

As shown in fig. 11, an embodiment of the present invention provides a second target master node, including:

a determining module 1101, configured to determine MCG configuration information of a target master node configured to a terminal and SCG configuration information of at least one target slave node;

a second sending module 1102, configured to send, to a source master node, MCG configuration information of the target master node and SCG configuration information of at least one target secondary node through one or more handover commands, so that the source master node determines, according to the one or more handover commands, a target handover command that needs to be sent to the terminal.

Optionally, the second sending module 1102 is specifically configured to:

Optionally, the second sending module 1102 is further configured to:

Optionally, the second sending module 1102 is specifically configured to:

a handover command sent to the source master node according to the following:

Based on the same inventive concept, the embodiment of the present invention further provides a first method for performing handover, and since the method corresponds to the method for performing handover on the source master node side in the system according to the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the system, the implementation of the method may refer to the implementation of the system, and repeated details are not described again.

As shown in fig. 12, a first method for performing handover according to an embodiment of the present invention includes:

step 1201, a source main node receives MCG configuration information of a target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switching commands;

step 1202, the source master node determines a target handover command to be sent to a terminal according to the one or more handover commands, and sends the target handover command to the terminal.

Based on the same inventive concept, the embodiment of the present invention further provides a first method for performing handover, and since the method corresponds to the method for performing handover on the terminal side in the system in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the system, the implementation of the method can refer to the implementation of the system, and repeated details are not described again.

As shown in fig. 13, a second method for performing handover according to an embodiment of the present invention includes:

step 1301, the terminal receives a target switching command sent by a source main node; the target switching command is determined by the source main node according to MCG configuration information of the target main node and SCG configuration information of at least one target auxiliary node, which are sent by the target main node through one or more switches;

step 1302, the terminal accesses a node corresponding to the configuration information included in the target handover command according to the target handover command.

Optionally, the method further includes:

the terminal sends a configuration completion message to the target main node;

Based on the same inventive concept, the embodiment of the present invention further provides a first method for performing handover, and since the method corresponds to the method for performing handover on the target master node side in the system according to the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the system, the implementation of the method may refer to the implementation of the system, and repeated details are not described again.

As shown in fig. 14, a third method for performing handover according to an embodiment of the present invention includes:

1401, the target main node determines MCG configuration information of the target main node configured to the terminal and SCG configuration information of at least one target auxiliary node;

step 1402, the target master node sends the MCG configuration information of the target master node and the SCG configuration information of at least one target secondary node to the source master node through one or more switching commands, so that the source master node determines a target switching command to be sent to the terminal according to the one or more switching commands.

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

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of performing a handover, the method comprising:

2. The method of claim 1, wherein the target handover command is a first handover command containing only MCG configuration information of the target master node; or

3. The method of claim 2, wherein the source master node receiving a plurality of handover commands transmitted by the target master node comprises:

4. The method of claim 3, wherein the determining by the source master node that a target handover command needs to be sent to the terminal comprises:

5. The method of claim 2, wherein when the source master node receives a handover command sent by the target master node, the handover command includes MCG configuration information of the target master node and SCG configuration information of all target secondary nodes.

6. The method of claim 5, wherein the determining by the source master node that a target handover command needs to be sent to the terminal comprises:

7. The method of claim 1, wherein after the source master node determines a target handover command that needs to be sent to a terminal, performing some or all of the following steps:

8. The method according to claim 4 or 6, characterized in that the source master node determines the target handover command to be sent to the terminal according to the following:

9. The method of claim 8, wherein the handover assistance information comprises some or all of the following information:

10. The method of claim 1, wherein the source master node receives the handover command sent by the target master node according to the following:

11. A method of performing a handover, the method comprising:

12. The method of claim 11, further comprising:

the terminal receives indication information which is sent by the source main node and indicates whether SCG configuration information of a target auxiliary node is not configured; and/or

13. The method of claim 11, wherein after the terminal accesses a node corresponding to configuration information included in the target handover command according to the target handover command, the method further comprises:

the terminal sends a configuration completion message to the target main node;

14. A method of performing a handover, the method comprising:

15. The method of claim 14, wherein the target master node sending MCG configuration information of the target master node and SCG configuration information of at least one target secondary node to a source master node via a plurality of handover commands, comprising:

16. The method of claim 14, wherein the target master node sending the MCG configuration information of the target master node and the SCG configuration information of the at least one target secondary node to the source master node via a handover command comprises:

17. The method of claim 14, wherein after the target master node sends the MCG configuration information of the target master node and the SCG configuration information of the at least one target secondary node to the source master node via one or more handover commands, further comprising:

18. The method of claim 14, wherein after the target master node sends the MCG configuration information of the target master node and the SCG configuration information of the at least one target secondary node to the source master node via one or more handover commands, further comprising:

19. The method of claim 14, wherein the target master node sends the handover command to the source master node according to:

20. A source-master node, comprising: a processor, a memory, and a transceiver;

wherein the processor is configured to read a program in the memory and execute:

21. The source master node of claim 20, wherein the target handover command is a first handover command containing only MCG configuration information of the target master node; or

22. The source master node of claim 21, wherein the processor is specifically configured to:

23. The source master node of claim 22, wherein the processor is specifically configured to:

24. The source master node of claim 21, wherein when the source master node receives a handover command sent by the target master node, the handover command includes MCG configuration information of the target master node and SCG configuration information of all target secondary nodes.

25. The source master node of claim 24, wherein the processor is specifically configured to:

26. The source master node of claim 20, wherein the processor is specifically configured to:

27. The source master node of claim 23 or 25, wherein the processor is specifically configured to:

28. The source master node of claim 27, wherein the handover assistance information comprises some or all of the following information:

29. The source master node of claim 20, wherein the processor is specifically configured to:

30. A terminal, characterized in that the terminal comprises: a processor, a memory, and a transceiver;

31. The terminal of claim 30, wherein the processor is further configured to:

32. The terminal of claim 30, wherein the processor is further configured to:

33. A target master node, comprising: a processor, a memory, and a transceiver;

34. The target master node of claim 33, wherein the processor is specifically configured to:

35. The target master node of claim 33, wherein the processor is specifically configured to:

36. The target master node of claim 33, wherein the processor is further configured to:

37. The target master node of claim 33, wherein the processor is further configured to:

38. The target master node of claim 33, wherein the processor is specifically configured to:

a handover command sent to the source master node according to the following:

39. A source-master node, comprising:

40. A terminal, comprising:

41. A target master node, comprising:

42. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 10.

43. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 11 to 13.

44. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 14 to 19.