CN113133066A - Switching method and network equipment - Google Patents

Abstract

The invention provides a switching method and network equipment, wherein the switching method comprises the following steps: sending a switching request message to target network equipment, and receiving indication information sent by the target network equipment, wherein the indication information indicates whether the target network equipment adds an auxiliary base station or an auxiliary cell for a terminal. The target network equipment sends the indication information to the source network equipment, so that the source network equipment can select the target network equipment for switching for the terminal according to the indication information, and the target network equipment with double connection configured for the terminal can be preferentially selected, so that the access performance of the terminal is improved.

Description

A switching method and network device

technical field

The present invention relates to the field of communication technologies, and in particular, to a handover method and network equipment.

Background technique

For a terminal that supports dual connectivity, let it reside as much as possible on an evolved Node B (eNB) that supports Non-Standalone (NSA) to carry out uplink services or downlink services. On the one hand, The network resources can be fully utilized, and the user experience can be improved on the other hand.

At present, three scenarios are mainly defined for handover under the NSA architecture:

Scenario 1: The eNB master node switches with the gNB secondary node (gNB can be replaced or not);

Scenario 2: The eNB switches to the eNB that has added the gNB secondary node;

Scenario 3: The eNB that has added the gNB secondary node is handed over to a separate gNB that has not added the gNB as the secondary node.

In the handover procedures formulated in the above three scenarios, the source base station does not know whether the target base station has added a secondary base station or a secondary cell for the terminal. As a result, the secondary base station or secondary cell selected by the source base station for the terminal does not support dual connectivity, which affects the connection of the terminal. into performance.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a handover method and network device to solve the problem that the source base station cannot know whether the target base station has added a secondary base station or a secondary cell for the terminal, so that the secondary base station or secondary cell selected by the source base station for the terminal does not support dual connectivity, which affects the The problem of terminal access performance.

In order to solve the above-mentioned technical problems, the present invention is achieved in this way:

In a first aspect, an embodiment of the present invention provides a handover method, which is applicable to a source network device, and the handover method includes:

Send a handover request message to the target network device;

Receive indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

In a second aspect, an embodiment of the present invention provides a handover method, which is applicable to a target network device, and the handover method includes:

Receive a handover request message sent by the source network device;

Sending indication information to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

In a third aspect, an embodiment of the present invention provides a network device, where the network device is a source network device, including a processor and a transceiver;

The transceiver is configured to send a handover request message to a target network device; and receive indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

In a fourth aspect, an embodiment of the present invention provides a network device, where the network device is a target network device, including a processor and a transceiver;

The transceiver is configured to receive a handover request message sent by a source network device, and send indication information to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

In a fifth aspect, an embodiment of the present invention provides a network device, where the network device is a source network device, and the network device includes:

a sending module, configured to send a handover request message to the target network device;

A receiving module, configured to receive indication information sent by a target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

In a sixth aspect, an embodiment of the present invention provides a network device, where the network device is a target network device, and the network device includes:

a receiving module, configured to receive the handover request message sent by the source network device;

A sending module, configured to send indication information to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

In a seventh aspect, an embodiment of the present invention provides a network device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, when the computer program is executed by the processor The steps in the switching method described in the first aspect are implemented, or, when the computer program is executed by the processor, the steps in the switching method described in the second aspect are implemented.

In an eighth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the switching method according to the first aspect is implemented. or, when the computer program is executed by the processor, the steps in the switching method described in the second aspect are implemented.

In this embodiment of the present invention, the source network device sends a handover request message to the target network device, and receives indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal. Since the target network device sends the indication information to the source network device, the source network device can select the target network device for handover for the terminal according to the indication information, so that the target network device configured with dual connections for the terminal can be preferentially selected, so as to improve the terminal's performance. access performance.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1a is one of the flowcharts of a handover method provided by an embodiment of the present invention;

FIG. 1b is the second flowchart of a handover method provided by an embodiment of the present invention;

FIG. 2 is the third flowchart of a handover method provided by an embodiment of the present invention;

3 is one of the structural diagrams of a network device provided by an embodiment of the present invention;

FIG. 4 is a second structural diagram of a network device provided by an embodiment of the present invention;

FIG. 5 is a third structural diagram of a network device provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIG. 1a, FIG. 1a is a flowchart of a handover method provided by an embodiment of the present invention, which is applied to a source network device. As shown in FIG. 1a, the method includes the following steps:

Step 11: Send a handover request message to the target network device.

The source network device (also referred to as the source base station) sends a handover request message to the target network device (also referred to as the target base station). Specifically, when the source network device sends the HO request (handover request) message to the target network device, the The cell identity and measurement result are carried in the HOrequest message.

Step 22: Receive indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

After receiving the HO request message, the target network device determines to indicate the target network in the indication information sent to the source network device according to whether it has the ability to add a secondary node or a secondary cell, and whether the secondary node or secondary cell is successfully added. Whether the device adds a secondary base station or secondary cell for the terminal. The indication information may be a HO command (handover command) message, which may indicate whether the target network device adds a secondary base station or a secondary cell for the terminal by including the configuration information of the secondary node or secondary cell in the HO command message.

In this embodiment, the source network device sends a handover request message to the target network device, and receives indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal. Since the target network device sends the indication information to the source network device, the source network device can select the target network device for handover for the terminal according to the indication information, so that the target network device configured with dual connections for the terminal can be preferentially selected, so as to improve the terminal's performance. access performance.

More detailed embodiments are listed below to describe the handover method provided by the present application.

Referring to FIG. 1b, FIG. 1b is a flowchart of a handover method provided by an embodiment of the present invention, which is applied to a source network device. As shown in FIG. 1b, the method includes the following steps:

Step 101: Select a target network device according to the measurement result sent by the terminal supporting dual connectivity.

The terminal reports the measurement result to the source base station according to the measurement configuration of the source base station (ie, the source network device), and the measurement result includes the eNB measurement result and the gNB measurement result.

The source network device selects a target network device for the terminal according to the measurement result sent by the terminal. The target network device can be one or more.

Step 102: Send a handover request message to the target network device.

When the source network device sends the HO request (handover request) message to the target network device, the HOrequest message may carry the cell identifier and the measurement result. This step is the same as step 11.

Step 103: Receive indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

After receiving the HO request message, the target network device determines to indicate the target network in the indication information sent to the source network device according to whether it has the ability to add a secondary node or a secondary cell, and whether the secondary node or secondary cell is successfully added. Whether the device adds a secondary base station or secondary cell for the terminal. The indication information may be a HO command (handover command) message, which may indicate whether the target network device adds a secondary base station or a secondary cell for the terminal by including the configuration information of the secondary node or secondary cell in the HO command message.

In this step, after receiving the indication information sent by the target network device, the source network device may determine whether the target network device adds a secondary base station or a secondary cell for the terminal according to the indication information. The indication information of the HO request message is determined. For example, if the target network device includes the configuration information of the secondary node or secondary cell in the HO command message returned to the source base station, the source network device may determine that the target network device has added a secondary node or secondary cell to the terminal according to the received HO command message. community. If the target network device does not include the configuration information of the secondary node or secondary cell in the HO command message returned to the source base station, the source network device can determine that the target network device has not added a secondary node or secondary cell for the terminal according to the received HOcommand message .

Step 104: Select a target network device for handover for the terminal according to the indication information.

Specifically, when a target network device for handover is selected for the terminal, a target network device for handover can be selected for the terminal from the target network devices according to a network device selection strategy, and the network device selection strategy is at least related to Whether the target network device adds a secondary base station or a secondary cell for the terminal is related.

The network device selection strategy may be at least one of the following strategies:

relative to the first network device, preferentially selecting the second network device as the target network device for handover; and,

selecting the target network device for handover from the second network device;

Wherein, the first network device is a network device in the target network device that does not add a secondary base station or a secondary cell for the terminal; the second network device is a network device in the target network device, which is added for the terminal the network equipment of the secondary base station or secondary cell.

Specifically, the target network device is divided into a first network device and a second network device according to whether a secondary base station or a secondary cell is added for the terminal, the first network device is a network device without adding a secondary base station or a secondary cell for the terminal, and the second network device The device is a network device that has added a secondary base station or a secondary cell for the terminal.

In the above two network device selection strategies, for the first selection strategy: in the target network device, compared with the first network device, the second network device has a higher priority and is selected as the target network device. That is to say, when the selection is made according to the network device selection strategy, the network device with the highest priority in the target network device is selected. In this way, when there is a network device that has added a secondary base station or a secondary cell for the terminal in the target network device, the other Under the same conditions, the source network device will preferentially select the network device that has added a secondary base station or secondary cell for the terminal as the target network device to ensure that the target network device supports dual connectivity to improve terminal access performance.

Under this strategy, the second network device has a relatively high priority. Due to the influence of other parameters, even if the second network device exists in the target network device, the second network device is not necessarily selected as the target network device.

For the second selection strategy: select the target network device for the terminal from the second network device. That is to say, when there is a network device that has added a secondary base station or a secondary cell for the terminal in the target network device, the target network device directly selects the target network device from the second network device that has added the secondary base station or secondary cell for the terminal to ensure that The target network device supports dual connections to improve terminal access performance.

Under this strategy, the second network device has the highest priority, and as long as the second network device exists in the target network device, the second network device must be selected as the target network device.

In this embodiment, the target network device is selected according to the measurement result sent by the terminal supporting dual connectivity; the handover request message is sent to the target network device; the indication information sent by the target network device is received, and the indication information indicates whether the target network device is a The terminal adds a secondary base station or a secondary cell; according to the indication information, a target network device for handover is selected for the terminal. In this way, since the source network device considers whether the target network device is configured with dual connections for the terminal when determining the target network device used by the terminal for handover, the target network device configured with dual connections for the terminal can be preferentially selected to improve the connectivity of the terminal. into performance.

The indication information is the configuration information of the secondary base station or the secondary cell in the handover command message, or the indication information is the first information or the second information in the handover request confirmation message, and the first information is used to indicate Whether a secondary base station or a secondary cell has been added for the terminal, the second information is used to indicate identification information of the secondary base station or secondary cell that has been added for the terminal.

That is, determining whether the target network device adds a secondary base station or secondary cell for the terminal according to the indication information, including:

According to the handover command message sent by the target network device, determine whether the target network device adds a secondary base station or a secondary cell for the terminal;

or,

According to the handover request confirmation message sent by the target network device, it is determined whether the target network device adds a secondary base station or a secondary cell for the terminal.

In this application, the target network device determines whether the target network device adds a secondary base station or a secondary cell for the terminal in two ways. The first way is: according to the HO command (handover command) message sent by the target network device, determine whether the target network device adds a secondary base station or a secondary cell for the terminal. The second manner is: according to the HO Reuqest Ack (handover request acknowledgement) message sent by the target network device, determine whether the target network device adds a secondary base station or a secondary cell for the terminal.

At present, whether the target network device has added the configuration information of the secondary base station or secondary cell to the terminal is only transmitted in the HO command message sent by the target network device to the source base station, and not transmitted on the interface between base stations, that is, the target network device sends the HO command message to the source base station. When the command is sent to the terminal, it is transparently transmitted to the terminal through the source base station, and the source base station does not know whether the target network device has added a secondary base station or a secondary cell to the terminal.

In the first method, the source network device will open the received HO command (handover command) message, check whether the HO command message includes the configuration information of the secondary base station or secondary cell, so as to determine whether the target network device has added the terminal for the terminal. Secondary base station or secondary cell. If the HO command message includes the configuration information of the secondary base station or the secondary cell, it is determined that the target network device adds the secondary base station or the secondary cell for the terminal; if the HO command message does not include the configuration information of the secondary base station or the secondary cell, it is determined that the target network device has no configuration information. Add a secondary base station or secondary cell for the terminal.

In the second manner, the target network device includes, in the HO Reuqest Ack (handover request acknowledgement) message, indication information that the secondary base station or secondary cell has been added to the terminal. The source network device determines whether the target network device adds a secondary base station or a secondary cell for the terminal according to the indication information in the handover request confirmation message sent by the target network device.

Specifically, the source network device determines whether the target network device adds a secondary base station or a secondary cell for the terminal according to at least one of the following information included in the handover request confirmation message:

first information, used to indicate whether a secondary base station or a secondary cell has been added to the terminal;

The second information is used to indicate the identification information of the secondary base station or secondary cell that has been added for the terminal.

The first information may include 1 bit, and a value of 1 indicates that the target network device has added a secondary base station or secondary cell for the terminal, and a value of 0 indicates that no secondary base station or secondary cell has been added to the terminal.

The second information is used to indicate the identification information of the secondary base station or secondary cell that has been added for the terminal. If the second information includes the identification information of the secondary base station or the secondary cell, it means that the target network device has added the secondary base station or the secondary cell for the terminal; if the second information does not include the identification information of the secondary base station or the secondary cell, it means that the target network device is not the terminal. Add a secondary base station or secondary cell.

Wherein, the first information is described by the newly added field of the handover request confirmation message, or described by the terminal context reservation indication bit in the terminal context reservation indication information element.

For example, indicated by the UE context kept indicator (terminal context kept indicator bit), a value of true indicates that the target network device has added a secondary base station or secondary cell, and the original secondary base station or former secondary cell is retained; a value of false indicates that all The target network device has added a secondary base station or a secondary cell, but it is not an original secondary base station or an original secondary cell. If it does not carry the keep gNB indication IE, it means that the secondary base station or secondary cell has been successfully added; wherein, the information element (InformationElement, referred to as IE) is Refers to an information element in a signaling message.

Or, indicated by the keep gNB indication bit, the value of 1 indicates that the target network device has added a secondary base station or a secondary cell, and the original secondary base station or the original secondary cell is reserved; the value of 0 indicates that the target network device has not added a secondary base station or secondary cell. If the base station or secondary cell does not carry the keep gNB indication IE, it means that the secondary base station or secondary cell has been added, but it is not the original secondary base station or the original secondary cell.

In the second method, the target network device can indicate whether the secondary base station or secondary cell has been added to the terminal through the handover request confirmation message, and can also indicate whether the HO command message includes the configuration information of the secondary base station or secondary cell at the same time. A secondary base station or secondary cell has been added to the terminal.

In the case where the target network device indicates through the HO command message whether the secondary base station or secondary cell has been added to the terminal, it may not include the indication that the secondary base station or secondary cell has been added to the terminal in the handover request confirmation message. In this case, the source network By opening and viewing the received HO command message, the device determines whether the target network device has added a secondary base station or secondary cell for the terminal (that is, the first method is used to determine).

Referring to FIG. 2, FIG. 2 is another flowchart of a handover method provided by an embodiment of the present invention, which is applied to a target network device. As shown in FIG. 2, the method includes the following steps:

Step 201: Receive a handover request message sent by a source network device.

When the source network device sends the handover request message (that is, the HO request message) to the target network device, the HOrequest message may carry the cell identifier and the measurement result. After receiving the HO request message, the target network device determines whether it includes the secondary node or secondary cell in the HO command message returned to the source base station according to whether it has the ability to add the secondary node or secondary cell, and whether the secondary node or secondary cell is successfully added. Configuration information of the secondary cell.

Step 202: Send indication information to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

The target network device determines whether the indication information sent to the source network device includes the information that the secondary node or the secondary cell has been added for the terminal according to whether it has the ability to add a secondary node or secondary cell, and whether the secondary node or secondary cell is successfully added. , so that the source network device can determine whether the target network device adds a secondary base station or a secondary cell for the terminal according to the indication information, so that the source network device preferentially selects the target network device configured with dual connectivity for the terminal to improve the terminal access performance.

In this embodiment, a handover request message sent by a source network device is received; and indication information is sent to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal. Since the source network device can determine whether the target network device adds a secondary base station or a secondary cell for the terminal according to the received indication information, the source network device can preferentially select the target with dual connectivity configured for the terminal when selecting the target network device for the terminal. network equipment to improve terminal access performance.

The indication information is the configuration information of the secondary base station or the secondary cell in the handover command message, or the indication information is the first information or the second information in the handover request confirmation message, and the first information is used to indicate Whether a secondary base station or a secondary cell has been added for the terminal, the second information is used to indicate identification information of the secondary base station or secondary cell that has been added for the terminal.

That is to say, the indication information can be transmitted through the HO command message, and whether the target network device has added configuration information of the secondary base station or secondary cell to the terminal is transmitted in the HO command message sent by the target network device to the source base station. The source network device may determine whether the target network device has added a secondary base station or a secondary cell for the terminal according to the HO command message.

If the target network device includes the configuration information of the secondary node or secondary cell in the HO command message returned to the source base station, the source network device can determine that the target network device has added the secondary node or secondary cell for the terminal according to the received HO command message . If the target network device does not include the configuration information of the secondary node or secondary cell in the HO command message returned to the source base station, the source network device can determine that the target network device has not added a secondary node or secondary cell to the terminal according to the received HO command message. community.

The indication information may also be transmitted through a handover request confirmation message, where the handover request confirmation message includes at least one of the following information, indicating whether to add a secondary base station or a secondary cell to the terminal:

first information, used to indicate whether a secondary base station or a secondary cell has been added to the terminal;

The second information is used to indicate the identification information of the secondary base station or secondary cell that has been added for the terminal.

The first information may include 1 bit, and a value of 1 indicates that the target network device has added a secondary base station or secondary cell for the terminal, and a value of 0 indicates that no secondary base station or secondary cell has been added to the terminal.

The second information is used to indicate the identification information of the secondary base station or secondary cell that has been added for the terminal. If the second information includes the identification information of the secondary base station or the secondary cell, it means that the target network device has added the secondary base station or the secondary cell for the terminal; if the second information does not include the identification information of the secondary base station or the secondary cell, it means that the target network device is not the terminal. Add a secondary base station or secondary cell.

Wherein, the first information is described by the newly added field of the handover request confirmation message, or described by the terminal context reservation indication bit in the terminal context reservation indication information element.

For example, indicated by the UE context kept indicator (terminal context kept indicator bit), a value of true indicates that the target network device has added a secondary base station or secondary cell, and the original secondary base station or former secondary cell is retained; a value of false indicates that all The target network device has added a secondary base station or a secondary cell, but it is not an original secondary base station or an original secondary cell. If it does not carry the keep gNB indication IE, it means that the secondary base station or secondary cell has been successfully added; wherein, the information element (InformationElement, referred to as IE) is Refers to an information element in a signaling message.

Or, indicated by the keep gNB indication bit, the value of 1 indicates that the target network device has added a secondary base station or a secondary cell, and the original secondary base station or the original secondary cell is reserved; the value of 0 indicates that the target network device has not added a secondary base station or secondary cell. If the base station or secondary cell does not carry the keep gNB indication IE, it means that the secondary base station or secondary cell has been added, but it is not the original secondary base station or the original secondary cell.

In addition to indicating whether the secondary base station or secondary cell has been added to the terminal through the handover request confirmation message, the target network device can also indicate whether the secondary base station or secondary cell has been added to the terminal through the HO command message at the same time whether the configuration information of the secondary base station or the secondary cell is included. Auxiliary District. That is, the indication information can be transmitted through the HO command message and the handover request confirmation message at the same time. In this way, the source network device can determine whether the target network device has added a secondary base station or a secondary cell for the terminal through the HO command message, and can also use the handover request confirmation message. to determine whether the target network device has added a secondary base station or secondary cell for the terminal.

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of a network device provided by an embodiment of the present invention. As shown in FIG. 3, the first network device 300 is a source network device, including:

a sending module 301, configured to send a handover request message to the target network device;

The receiving module 302 is configured to receive indication information sent by a target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

Wherein, the first network device 300 further includes: a selection module for selecting a target network device for handover for the terminal according to the indication information.

Wherein, the selection module is used for:

Compared with the first network device, the second network device is preferentially selected as the target network device for handover;

and,

selecting the target network device for handover from the second network device;

The first network device is a network device in the target network device that does not add a secondary base station or a secondary cell for the terminal; the second network device is a network device in the target network device that adds a secondary base station for the terminal. Network equipment of the base station or secondary cell.

The indication information is the configuration information of the secondary base station or the secondary cell in the handover command message, or the indication information is the first information or the second information in the handover request confirmation message, and the first information is used to indicate Whether a secondary base station or a secondary cell has been added for the terminal, the second information is used to indicate identification information of the secondary base station or secondary cell that has been added for the terminal.

Wherein, the first information is described by the newly added field of the handover request confirmation message, or described by the terminal context reservation indication bit in the terminal context reservation indication information element.

The first network device 300 can implement each process implemented by the source network device in the method embodiment shown in FIG. 1 , and to avoid repetition, details are not repeated here.

In the first network device 300 in this embodiment of the present invention, the source network device sends a handover request message to the target network device, and receives indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or Auxiliary District. Since the target network device sends the indication information to the source network device, the source network device can select the target network device for handover for the terminal according to the indication information, so that the target network device configured with dual connections for the terminal can be preferentially selected, so as to improve the terminal's performance. Access performance.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a network device provided by an embodiment of the present invention. As shown in FIG. 4, the second network device 400 is a target network device, including:

A receiving module 401, configured to receive a handover request message sent by a source network device;

The sending module 402 is configured to send indication information to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal.

The indication information is the configuration information of the secondary base station or the secondary cell in the handover command message, or the indication information is the first information or the second information in the handover request confirmation message, and the first information is used to indicate Whether a secondary base station or a secondary cell has been added to the terminal, the second information is used to indicate identification information of the secondary base station or secondary cell that has been added to the terminal.

Wherein, the first information is described by the newly added field of the handover request confirmation message, or described by the terminal context reservation indication bit in the terminal context reservation indication information element.

The second network device 400 can implement each process implemented by the target network device in the method embodiment shown in FIG. 2 , which is not repeated here to avoid repetition.

The second network device 400 in this embodiment of the present invention receives a handover request message sent by a source network device, and sends indication information to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal . Since the source network device can determine whether the target network device adds a secondary base station or a secondary cell for the terminal according to the received indication information, the source network device can preferentially select the target with dual connectivity configured for the terminal when selecting the target network device for the terminal. network equipment to improve terminal access performance.

Referring to FIG. 5 , an embodiment of the present invention further provides a network device including a bus 501 , a transceiver 502 , an antenna 503 , a bus interface 504 , a processor 505 and a memory 506 .

In one case, the transceiver 502 is configured to send a handover request message to the target network device; receive indication information sent by the target network device, the indication information indicating whether the target network device adds a secondary base station or a secondary cell for the terminal .

The processor 505 is configured to select a target network device for handover for the terminal according to the indication information.

Wherein, the processor 505 is used for:

Compared with the first network device, the second network device is preferentially selected as the target network device for handover;

and,

selecting the target network device for handover from the second network device;

The first network device is a network device in the target network device without adding a secondary base station or a secondary cell for the terminal; the second network device is in the target network device, adding a secondary base station for the terminal. Network equipment of the base station or secondary cell.

The indication information is the configuration information of the secondary base station or the secondary cell in the handover command message, or the indication information is the first information or the second information in the handover request confirmation message, and the first information is used to indicate Whether a secondary base station or a secondary cell has been added for the terminal, the second information is used to indicate identification information of the secondary base station or secondary cell that has been added for the terminal.

Wherein, the first information is described by the newly added field of the handover request confirmation message, or described by the terminal context reservation indication bit in the terminal context reservation indication information element.

The network device can implement each process implemented by the source network device in the method embodiment shown in FIG. 1 , which is not repeated here to avoid repetition.

In this embodiment of the present invention, the source network device sends a handover request message to the target network device, and receives indication information sent by the target network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal. Since the target network device sends the indication information to the source network device, the source network device can select the target network device for handover for the terminal according to the indication information, so that the target network device configured with dual connections for the terminal can be preferentially selected, so as to improve the terminal's performance. access performance.

In another case, the transceiver 502 is configured to receive a handover request message sent by a source network device; and send indication information to the source network device, where the indication information indicates whether the target network device adds a secondary base station for the terminal or sub-district.

The indication information is the configuration information of the secondary base station or the secondary cell in the handover command message, or the indication information is the first information or the second information in the handover request confirmation message, and the first information is used to indicate Whether a secondary base station or a secondary cell has been added for the terminal, the second information is used to indicate identification information of the secondary base station or secondary cell that has been added for the terminal.

Wherein, the first information is described by the newly added field of the handover request confirmation message, or described by the terminal context reservation indication bit in the terminal context reservation indication information element.

The network device can implement each process implemented by the target network device in the method embodiment shown in FIG. 2 , which is not repeated here to avoid repetition.

In this embodiment, a handover request message sent by a source network device is received; and indication information is sent to the source network device, where the indication information indicates whether the target network device adds a secondary base station or a secondary cell for the terminal. Since the source network device can determine whether the target network device adds a secondary base station or a secondary cell for the terminal according to the received indication information, the source network device can preferentially select the target with dual connectivity configured for the terminal when selecting the target network device for the terminal. network equipment to improve terminal access performance.

In Figure 5, a bus architecture (represented by bus 501), which may include any number of interconnected buses and bridges, bus 501 will include one or more processors represented by processor 505 and memory represented by memory 506 The various circuits are linked together. The bus 501 may also link together various other circuits such as peripherals, voltage regulators and power management circuits, etc., which are well known in the art and therefore will not be described further herein. Bus interface 504 provides an interface between bus 501 and transceiver 502 . Transceiver 502 may be a single element or multiple elements, such as multiple receivers and transmitters, providing means for communicating with various other devices over a transmission medium. The data processed by the processor 505 is transmitted on the wireless medium through the antenna 503 , and further, the antenna 503 also receives the data and transmits the data to the processor 505 .

The processor 505 is responsible for managing the bus 501 and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management, and other control functions. In turn, memory 506 may be used to store data used by processor 505 in performing operations.

Optionally, the processor 505 may be a CPU, ASIC, FPGA or CPLD.

Preferably, an embodiment of the present invention further provides a network device, including a processor 505, a memory 506, and a computer program stored in the memory 506 and running on the processor 505, when the computer program is executed by the processor 505 Each process of the above-mentioned embodiment of the switching method shown in FIG. 1 is realized, or, when the computer program is executed by the processor 505, each process of the above-mentioned embodiment of the switching method shown in FIG. 2 can be realized, and the same technical effect can be achieved. In order to avoid repetition , which will not be repeated here.

Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, each process of the switching method embodiment shown in FIG. 1 is implemented, and can To achieve the same technical effect, in order to avoid repetition, details are not repeated here.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, each process of the switching method embodiment shown in FIG. To achieve the same technical effect, in order to avoid repetition, details are not repeated here.

Wherein, the computer-readable storage medium, such as ROM, RAM, magnetic disk or optical disk, etc.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

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

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (20)

1. A switching method is applicable to a source network device, and is characterized in that the switching method comprises the following steps:

sending a switching request message to target network equipment;

receiving indication information sent by target network equipment, wherein the indication information indicates whether the target network equipment adds an auxiliary base station or an auxiliary cell for a terminal.

2. The handover method according to claim 1, wherein after receiving the indication information sent by the target network device, the method further comprises:

and selecting target network equipment for switching for the terminal according to the indication information.

3. The handover method according to claim 2, wherein the selecting, according to the indication information, a target network device for handover for the terminal specifically includes:

preferentially selecting a second network device as the target network device for handover relative to a first network device;

and,

selecting the target network equipment for switching from second network equipment;

the first network equipment is network equipment which does not add an auxiliary base station or an auxiliary cell to the terminal in the target network equipment; and the second network equipment is the network equipment which adds an auxiliary base station or an auxiliary cell to the terminal in the target network equipment.

4. The handover method according to claim 1, wherein:

the indication information is configuration information of an auxiliary base station or an auxiliary cell in a handover command message, or the indication information is first information or second information in a handover request confirmation message, the first information is used for indicating whether the auxiliary base station or the auxiliary cell is added to the terminal, and the second information is used for indicating identification information of the auxiliary base station or the auxiliary cell added to the terminal.

5. The handover method according to claim 4, wherein the first information is described by a newly added field of the handover request acknowledge message or by a terminal context retention indication bit in a terminal context retention indication information element.

6. A handover method applicable to a target network device is characterized in that the handover method comprises the following steps:

receiving a switching request message sent by source network equipment;

and sending indication information to the source network equipment, wherein the indication information indicates whether the target network equipment adds an auxiliary base station or an auxiliary cell for the terminal.

7. The handover method according to claim 6, wherein: the indication information is configuration information of an auxiliary base station or an auxiliary cell in a handover command message, or the indication information is first information or second information in a handover request confirmation message, the first information is used for indicating whether the auxiliary base station or the auxiliary cell is added to the terminal, and the second information is used for indicating identification information of the auxiliary base station or the auxiliary cell added to the terminal.

8. The handover method according to claim 7, wherein the first information is described by a newly added field of the handover request acknowledge message or by a terminal context retention indication bit in a terminal context retention indication information element.

9. A network device, the network device being a source network device, comprising a processor and a transceiver;

the transceiver is configured to send a handover request message to a target network device, and receive indication information sent by the target network device, where the indication information indicates whether the target network device adds an auxiliary base station or an auxiliary cell to a terminal.

10. The network device of claim 9, wherein the processor is configured to:

and selecting target network equipment for switching for the terminal according to the indication information.

11. The network device of claim 10, wherein the processor is configured to:

preferentially selecting a second network device as the target network device for handover relative to a first network device;

and,

selecting the target network equipment for switching from second network equipment;

the first network equipment is network equipment which does not add an auxiliary base station or an auxiliary cell to the terminal in the target network equipment; and the second network equipment is the network equipment which adds an auxiliary base station or an auxiliary cell to the terminal in the target network equipment.

12. The network device according to claim 9, wherein the indication information is configuration information of a secondary base station or a secondary cell in a handover command message, or the indication information is first information or second information in a handover request acknowledgement message, the first information is used to indicate whether a secondary base station or a secondary cell has been added to the terminal, and the second information is used to indicate identification information of a secondary base station or a secondary cell that has been added to the terminal.

13. The network device according to claim 12, wherein the first information is described by a newly added field of the handover request confirm message or by a terminal context retention indication bit in a terminal context retention indication information element.

14. A network device, the network device being a target network device, comprising a processor and a transceiver;

the transceiver is configured to receive a handover request message sent by a source network device, and send indication information to the source network device, where the indication information indicates whether the target network device adds an auxiliary base station or an auxiliary cell to a terminal.

15. The network device according to claim 14, wherein the indication information is configuration information of a secondary base station or a secondary cell in a handover command message, or the indication information is first information or second information in a handover request acknowledgement message, the first information is used to indicate whether a secondary base station or a secondary cell has been added to the terminal, and the second information is used to indicate identification information of a secondary base station or a secondary cell that has been added to the terminal.

16. The network device according to claim 15, wherein the first information is described by a newly added field of the handover request confirm message or by a terminal context retention indication bit in a terminal context retention indication information element.

17. A network device, the network device being a source network device, the network device comprising:

a sending module, configured to send a handover request message to a target network device;

the device comprises a receiving module for receiving indication information sent by a target network device, wherein the indication information indicates whether the target network device adds an auxiliary base station or an auxiliary cell for a terminal.

18. A network device, the network device being a target network device, the network device comprising:

a receiving module, configured to receive a handover request message sent by a source network device;

a sending module, configured to send indication information to the source network device, where the indication information indicates whether the target network device adds an auxiliary base station or an auxiliary cell to a terminal.

19. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps in the handover method according to any one of claims 1 to 5 or the computer program when executed by the processor implementing the steps in the handover method according to any one of claims 6 to 8.

20. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps in the handover method according to one of the claims 1 to 5, or which computer program, when being executed by the processor, carries out the steps in the handover method according to one of the claims 6 to 8.

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