WO2020164436A1

WO2020164436A1 - Communication method, apparatus and system

Info

Publication number: WO2020164436A1
Application number: PCT/CN2020/074423
Authority: WO
Inventors: 王瑞; 曾清海; 戴明增
Original assignee: 华为技术有限公司
Priority date: 2019-02-15
Filing date: 2020-02-06
Publication date: 2020-08-20
Also published as: CN111586766B; CN111586766A

Abstract

Disclosed are a communication method, apparatus and system, wherein same relate to the technical field of communications, and are capable of solving the problems of a long consumption time for configuring a destination station by means of a terminal and a low configuration rate. The communication method is applied to a communication system which comprises a first subsystem and a second subsystem, wherein the first subsystem comprises a communication apparatus and a secondary source station, and the communication apparatus and the secondary source station provide a service for a terminal; the second subsystem comprises a master destination station; and the network standard of the master destination station is the same as the network standard of the secondary source station. Specifically, the communication apparatus sends, to the master destination station, a switching request message comprising network standard information of the secondary source station, which message is used for requesting that the terminal is switched to the master destination station; correspondingly, the communication apparatus receives a switching command from the master destination station, which switching command is used for instructing the configuration of a master cell group (MCG) of the master destination station according to configuration information of a secondary cell group (SCG) of the secondary source station; and subsequently, the communication apparatus sends the switching command to the terminal.

Description

Communication method, device and system

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on February 15, 2019, the application number is 201910118048.5, and the invention title is "a communication method, device and system", the entire content of which is incorporated herein by reference Applying.

Technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method, device, and system.

Background technique

In a dual connectivity (DC) communication system, user equipment (UE) can transmit data through a primary cell group (master cell group, MCG) and a secondary cell group (secondary cell group, SCG). If the source MCG fails or the current communication quality is poor, the terminal can release the communication with the source master node (MN) and the source secondary node (SN), and delete the configuration information of the source SCG. Subsequently, the terminal may reconfigure the target station (for example, the base station serving the reselected cell/source MN determines the target base station for handover of the terminal) to realize communication with the target base station.

However, in the above method, the process time for the terminal to configure the target station is relatively long, and the configuration rate is low, which reduces the communication rate.

Summary of the invention

The embodiments of the present application provide a communication method, device, and system, which solve the problems of long time consumed by the terminal to configure the target station, low configuration rate, and low communication rate.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of this application:

In a first aspect, a communication method is provided, which is applied to a communication system including a first subsystem (the subsystem includes a source master station and a source auxiliary station that provide services for terminals) and a second subsystem (the subsystem Including the target master station that can provide services to the terminal, the network standard of the target master station is the same as that of the source auxiliary station). Specifically, the source master station sends a switch request message including the network standard information of the source auxiliary station to the target master station to request the terminal to be switched to the target master station; subsequently, the source master station receives the switch command from the target master station, And send the switching command to the terminal, which is used to instruct to configure the MCG of the target primary station according to the configuration information of the SCG of the source secondary station.

The configuration of the MCG of the target master station in this application is performed according to the configuration information of the SCG of the source auxiliary station. Compared with the need to reconfigure the target master station in the prior art, the embodiment of this application effectively reduces Time consumption improves the configuration rate and communication rate.

Optionally, in a possible implementation manner of the present application, the above-mentioned switching command includes first configuration increment information; the first configuration increment information is used to combine the configuration information of the SCG of the source secondary station to make a difference to the target primary station. Or, the above switching command includes first indication information, the first indication information is used to indicate that the configuration information of the SCG of the source secondary station is used as the configuration information of the MCG of the target primary station.

In a scenario where the switching command is used to instruct the MCG of the target primary station to be configured according to the configuration information of the SCG of the source secondary station, the switching command can be embodied in various forms.

Optionally, in another possible implementation manner of the present application, the handover request message further includes the network standard information of the source master station, and the second subsystem also includes the target auxiliary station, and the network standard of the target auxiliary station and the source master station The network standards of the stations are the same. In this scenario, the above switching command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.

In a scenario where the network standard of the target auxiliary station is the same as the network standard of the source master station, the SCG of the target auxiliary station is configured based on the MCG configuration information of the source master station, which effectively reduces time consumption and improves the configuration rate and communication rate.

Optionally, in another possible implementation manner of the present application, if the above switching command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station, the switching command also includes the first 2. Configuration increment information, where the second configuration increment information is used to configure the SCG of the target secondary station in combination with the configuration information of the MCG of the source primary station; or, the switching command includes second indication information, the second indication information Used to indicate the MCG configuration information of the source master station as the SCG configuration information of the target secondary station.

The handover command in this application can be embodied in various forms.

Optionally, in another possible implementation manner of the present application, the aforementioned handover command further includes a release indication or capability information. The release indication is used to indicate the release of the configured SRB3, and the capability information is used to indicate that the target secondary station does not Support SRB3.

In the 5G dual-connection communication system, the auxiliary station can be configured with SRB3. If the target secondary station does not support SRB3, the target master station informs the terminal to release the configured SRB3.

Optionally, in another possible implementation manner of the present application, before the source master station sends the handover request message to the target master station, the source master station also obtains the target report, or receives the target master station from the source auxiliary station Information. The target report includes a measurement report, or includes MCG failure information and a measurement report. The MCG failure information is used to indicate the MCG failure of the source master station. The measurement report is a report based on the measurement configuration information sent by the source master station or the source slave station. . The information of the target primary station includes the identity of the target primary station, or includes the identity of the target primary station and the identity of the target cell, where the target cell is the primary serving cell after the terminal is handed over to the target primary station.

The source master station can determine the information of the target master station according to the target report, and can also receive the information of the target master station from the source auxiliary station. The communication method provided in this application is applicable to scenarios where MCG fails, and it can also be applied to scenarios where MCG does not fail, and the source primary station or source secondary station directly determines to switch the terminal to the target primary station according to the measurement report sent by the terminal.

Optionally, in another possible implementation manner of the present application, the above-mentioned "source master station obtains target report" method is: the source master station receives the target report from the source auxiliary station; or the source master station splits the SRB Receive target reports from the terminal.

The source master station can obtain the target report by splitting the SRB, or it can obtain the target report by communicating with the source auxiliary station.

Optionally, in another possible implementation manner of the present application, the above-mentioned method of "the source master station sends a handover command to the terminal" is: the source master station sends a handover command to the terminal via the source auxiliary station; or, the source master station Send a handover command to the terminal through the split SRB.

If the source master station is configured with a split SRB, the source master station communicates with the terminal through the split SRB, without the source slave station sensing and parsing handover commands.

Optionally, in another possible implementation manner of the present application, the source secondary station is configured with SRB3, and the split SRB is established by the terminal through SRB3.

Optionally, in another possible implementation manner of this application, the target primary station and the source secondary station are the same device.

In a second aspect, a communication device is provided, which can implement the functions in the first aspect and any one of its possible implementation manners. These functions can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible manner of the present application, the communication device may include a sending unit and a receiving unit, and the sending unit and the receiving unit can perform corresponding functions in the communication method of the first aspect and any one of its possible implementations. . For example: the sending unit is configured to send a handover request message to the target primary station, the handover request message is used to request to switch the terminal to the target primary station, and the handover request message includes the network standard information of the source secondary station; The receiving unit is configured to receive a switching command from the target primary station, the switching command is used to instruct to configure the MCG of the target primary station according to the configuration information of the SCG of the source secondary station; the sending unit is also used to The terminal sends the handover command.

In a third aspect, a communication device is provided. The communication device includes a processor, the processor is configured to be coupled with a memory, read and execute instructions in the memory, so as to implement the first aspect and any one of its possibilities. Implement the communication method described in the mode.

Optionally, the communication device may further include a memory for storing program instructions and data of the communication device. Further optionally, the communication device may further include a transceiver, which is used to execute the communication method described in the first aspect and any one of its possible implementations under the control of the processor of the communication device The steps of sending and receiving data, signaling or information, for example, sending a handover request message and receiving a handover command.

Optionally, the communication device may be the source master station, or a part of the devices in the source master station, such as a chip system in the source master station. The chip system is used to support the source master station to implement the functions involved in the first aspect and any one of its possible implementations, for example, receiving, sending or processing the data and/or information involved in the aforementioned communication method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

In a fourth aspect, a computer-readable storage medium is also provided, the computer-readable storage medium stores instructions; when it runs on a communication device, the communication device is caused to execute the above-mentioned first aspect and various possible implementations thereof The communication method described in the method.

In a fifth aspect, a computer program product including instructions is also provided, which when running on a communication device, causes the communication device to execute the communication method as described in the first aspect and various possible implementations thereof.

It should be noted that the above instructions may be stored in whole or in part on the first computer storage medium, where the first computer storage medium may be packaged with the processor or separately packaged with the processor. This application will not specifically describe this. limited.

For the specific description of the second aspect, third aspect, fourth aspect, fifth aspect and various implementation manners of this application, reference may be made to the detailed description in the first aspect and various implementation manners; and, the second aspect, For the beneficial effects of the third aspect, the fourth aspect, the fifth aspect and their various implementation manners, reference may be made to the analysis of the beneficial effects in the first aspect and the various implementation manners, which will not be repeated here.

In a sixth aspect, a communication method is provided, which is applied to a communication system including a first subsystem (the subsystem includes a source master station and a source auxiliary station that provide services for terminals) and a second subsystem (the subsystem Including the target master station that can provide services to the terminal, the network standard of the target master station is the same as that of the source auxiliary station). Specifically, the target master station receives a handover request message from the source master station, the handover request message is used to request to switch the terminal to the target master station, and the handover request message includes the network standard information of the source auxiliary station; subsequently, if the target master station Reserve resources for the terminal, and the target master station sends a switch command to the source master station to instruct the MCG of the target master station to be configured according to the configuration information of the SCG of the source auxiliary station.

The switching command sent by the target master station is used to instruct the MCG of the target master station to be configured according to the configuration information of the SCG of the source auxiliary station. After the subsequent terminal obtains the switching command, it can perform the operation according to the configuration information of the SCG The MCG of the target master station is configured. Compared with the need to reconfigure the target master station in the prior art, the embodiment of the present application effectively reduces time consumption and improves the configuration rate and communication rate.

The handover command in this application can be embodied in various forms.

Optionally, in another possible implementation manner of the present application, the handover command further includes a release indication or capability information. The release indication is used to indicate the release of the configured SRB3, and the capability information is used to indicate that the target secondary station does not support SRB3.

In a seventh aspect, a communication device is provided, which can implement the functions in the sixth aspect and any one of its possible implementation manners. These functions can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible manner of the present application, the communication device may include a sending unit and a receiving unit, and the sending unit and the receiving unit can perform the corresponding functions in the communication method of the sixth aspect and any one of its possible implementations. . For example: the receiving unit is configured to receive a handover request message from the source master station, the handover request message is used to request the terminal to be switched to the target master station, the handover request message includes the network standard information of the source secondary station; the sending unit, If the target master station reserves resources for the terminal, send a switching command to the source master station, where the switching command is used to instruct to configure the MCG of the target master station according to the configuration information of the SCG of the source secondary station.

According to an eighth aspect, a communication device is provided. The communication device includes a processor configured to couple with a memory, read and execute instructions in the memory, so as to implement the sixth aspect and any one of the possibilities thereof. Implement the communication method described in the mode.

Optionally, the communication device may further include a memory for storing program instructions and data of the communication device. Further optionally, the communication device may further include a transceiver, which is used to execute the communication method described in the sixth aspect and any one of its possible implementations under the control of the processor of the communication device The steps of sending and receiving data, signaling or information, for example, receiving handover request messages and sending handover commands.

Optionally, the communication device may be the target master station, or a part of the devices in the target master station, such as a chip system in the target master station. The chip system is used to support the target master station to implement the functions involved in the sixth aspect and any one of its possible implementations, for example, receiving, sending or processing the data and/or information involved in the aforementioned communication method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

In a ninth aspect, a computer-readable storage medium is also provided, the computer-readable storage medium stores instructions; when it runs on a communication device, the communication device executes the sixth aspect and various possible implementations as described above The communication method described in the method.

In a tenth aspect, a computer program product including instructions is also provided, which when running on a communication device, causes the communication device to execute the communication method as described in the sixth aspect and various possible implementations thereof.

For specific descriptions of the seventh aspect, eighth aspect, ninth aspect, tenth aspect and various implementation manners of this application, reference may be made to the detailed description in the sixth aspect and various implementation manners; and, the seventh aspect, For the beneficial effects of the eighth aspect, the ninth aspect, the tenth aspect and various implementation manners thereof, reference may be made to the analysis of the beneficial effects in the sixth aspect and various implementation manners, which will not be repeated here.

In an eleventh aspect, a communication method is provided, which is applied to a communication system including a first subsystem (the subsystem includes a source master station and a source auxiliary station that provide services for a terminal) and a second subsystem (the sub The system includes a target master station that can provide services for the terminal, and the network standard of the target master station is the same as the network standard of the source auxiliary station). Specifically, the terminal receives a switching command from the source master station, which is used to instruct to configure the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station; in response to the switching command, the terminal according to the SCG of the source auxiliary station The configuration information configures the MCG of the target master station.

After obtaining the handover command, the terminal can configure the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station. Compared with the need to reconfigure the target master station in the prior art, the embodiment of the present application effectively reduces time consumption and improves the configuration rate and communication rate.

Optionally, in another possible implementation manner of the application, the handover request message also includes the network standard of the source master station, and the second subsystem also includes the target auxiliary station, the network standard of the target auxiliary station and the source master station The network standard is the same. In this scenario, the above switching command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.

The handover command in this application can be embodied in various forms.

Optionally, in another possible implementation manner of the present application, the handover command further includes a release indication or capability information. The release indication is used to indicate the release of the configured SRB3, and the capability information is used to indicate that the target secondary station does not support SRB3. Correspondingly, the terminal also releases the configured SRB3.

In the 5G dual-connection communication system, the auxiliary station can be configured with SRB3. If the target secondary station does not support SRB3, the terminal releases the configured SRB3.

Optionally, in another possible implementation manner of the present application, the above-mentioned method of "the terminal receives the handover command from the source master station" is: the terminal receives the handover command sent by the source master station; or, the terminal receives the source master station through SRB3 The switching command sent by the auxiliary station, and the switching command sent by the source auxiliary station comes from the source master station.

If the terminal is configured with a split SRB, the terminal can directly communicate with the source master station; if the terminal is not configured with a split SRB and is configured with SRB3, the terminal can communicate with the source master station through the source auxiliary station.

Optionally, in another possible implementation manner of the present application, before receiving the handover command from the source master station, the terminal also sends a target report to the source master station through split SRB; or, the terminal also sends a target report to the source master station through SRB3 The station sends the target report. The target report here is used to determine the target master station. The target report includes measurement reports or MCG failure information and measurement reports. MCG failure information is used to indicate MCG failure of the source master station. The measurement report is based on the source master station or the source auxiliary station. The sent measurement configuration information measurement report.

Optionally, in another possible implementation manner of the present application, the terminal also obtains target configuration information through SRB3, and performs configuration according to the target configuration information to establish a split SRB.

The terminal establishes a split SRB through SRB3, so that the terminal can communicate with the source master station according to the established split SRB, and it is no longer necessary to pass through the source auxiliary station and the source master station.

Optionally, in another possible implementation manner of the present application, the above method of "the terminal obtains target configuration information through SRB3" is: the terminal sends an establishment instruction to the source secondary station through SRB3 to trigger the establishment of the split SRB; Correspondingly, the terminal receives the target configuration information from the secondary station through SRB3.

In a twelfth aspect, a communication device is provided, which can implement the functions in the eleventh aspect and any one of its possible implementation manners. These functions can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible manner of the present application, the communication device may include a receiving unit and a processing unit, and the receiving unit and the processing unit may execute the corresponding communication method in the eleventh aspect and any one of its possible implementation manners. Features. For example: the receiving unit is configured to receive a switching command from the source master station, the switching command is used to instruct to configure the MCG of the target master station according to the configuration information of the SCG of the source secondary station; the processing unit is configured to respond to the The switching command configures the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station.

In a thirteenth aspect, a communication device is provided. The communication device includes a processor configured to couple with a memory, read and execute instructions in the memory, so as to implement the eleventh aspect and any one thereof Possible implementation methods described in the communication method.

Optionally, the communication device may further include a memory for storing program instructions and data of the communication device. Further optionally, the communication device may further include a transceiver, which is used to execute the communication method described in the eleventh aspect and any one of its possible implementations under the control of the processor of the communication device The step of sending and receiving data, signaling or information, for example, receiving a handover command.

Optionally, the communication device may be a terminal, or a part of devices in the terminal, such as a chip system in the terminal. The chip system is used to support the terminal to implement the functions involved in the eleventh aspect and any one of its possible implementations, for example, to receive, send or process the data and/or information involved in the aforementioned communication method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

In a fourteenth aspect, a computer-readable storage medium is also provided. The computer-readable storage medium stores instructions; when it runs on a communication device, the communication device executes the eleventh aspect and its various possibilities. The communication method described in the implementation mode.

In a fifteenth aspect, a computer program product including instructions is also provided, which when running on a communication device, causes the communication device to execute the communication method described in the eleventh aspect and various possible implementations thereof.

For specific descriptions of the twelfth aspect, thirteenth aspect, fourteenth aspect, fifteenth aspect and various implementation modes of this application, please refer to the detailed description in the eleventh aspect and various implementation modes; and For the beneficial effects of the twelfth aspect, the thirteenth aspect, the fourteenth aspect, the fifteenth aspect and their various implementations, please refer to the eleventh aspect and the analysis of the beneficial effects in the various implementations, here No longer.

In a sixteenth aspect, a communication system is provided, which includes the communication device according to any one of the second to fifth aspects, the communication device according to any one of the seventh to tenth aspects, And the communication device according to any one of the twelfth aspect to the fifteenth aspect.

In a seventeenth aspect, a chip system is provided, and the chip system is applied to a communication device. Specifically, the chip system includes one or more interface circuits and one or more processors. The interface circuit and the processor are interconnected by wires. The interface circuit is used to receive a signal from the memory of the communication device and send the signal to the processor, and the signal includes a computer instruction stored in the memory. When the processor executes the computer instruction, the communication device executes the communication method described in the first aspect and various possible implementations thereof, or executes the sixth aspect and various possible implementations thereof Or implement the communication methods described in the eleventh aspect and its various possible implementation manners.

In this application, the name of the aforementioned communication device does not constitute a limitation on the device or functional module itself. In actual implementation, these devices or functional modules may appear under other names. As long as the function of each device or functional module is similar to that of this application, it falls within the scope of the claims of this application and equivalent technologies.

These and other aspects of the application will be more concise and understandable in the following description.

Description of the drawings

Figure 1 is a schematic diagram of the communication system structure of the ENDC scenario;

Figure 2 is a schematic diagram of the communication system structure of the NEDC scenario;

Figure 3 is a schematic diagram of the communication system structure of the NG-ENDC scenario;

4 is a schematic diagram of the control plane protocol stack of the terminal in the dual-connection communication system;

5 is a schematic diagram of the hardware structure of the communication device in an embodiment of the application;

FIG. 6 is a first schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 7 is a schematic diagram 1 of the processing flow of the control plane of the terminal in the handover process according to an embodiment of the application;

8 is a second schematic diagram of the processing flow of the control plane of the terminal in the handover process according to the embodiment of the application;

FIG. 9 is a second schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 10 is a third schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 11 is a fourth flowchart of a communication method provided by an embodiment of this application;

FIG. 12 is a first structural diagram of a communication device provided by an embodiment of this application;

FIG. 13 is a second structural diagram of a communication device provided by an embodiment of this application;

FIG. 14 is a third structural diagram of a communication device provided by an embodiment of this application.

detailed description

In the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations, or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as "exemplary" or "for example" are used to present related concepts in a specific manner.

Hereinafter, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

In the 5th generation mobile communication technology (5G) system, there are multiple RATs dual connectivity (MR-DC) communication systems with multiple wireless access technologies. The MR-DC communication system includes ENDC (E-UTRA NR DC), NEDC (NR E-UTRA DC), and NG-ENDC (Next Generation E-UTRA NR DC).

Among the above three communication systems, long-term evolution (LTE) base stations (for example: evolved node base station (eNB) connected to the evolved packet core (EPC)) or connected to the next-generation core network (evolved node base station, eNB) The ng-eNB of the next-generation core (NGC) is dual-connected with a new radio (NR) base station (referred to as gNB).

Among them, the ng-eNB can provide the terminal with the 5th generation core network (the 5th generation core network, 5GCN) service, and can also provide the terminal with the EPC service. In actual deployment, the ng-eNB can only connect with 5GCN/EPC, or connect with 5GCN and EPC at the same time. 5GCN can also be called 5GC.

The above-mentioned ENDC is also called Option 3/3A/3X. In the ENDC communication system, LTE eNB is a master node (master node, MN), gNB is a secondary node (secondary node, SN), MN is connected to EPC, and both MN and SN provide air interface transmission resources for data between UE and EPC.

As shown in Fig. 1, (a) in Fig. 1 is a schematic structural diagram of the Option 3 communication system, and (b) in Fig. 1 is a schematic structural diagram of the Option 3A communication system. In the Option 3 communication system, the LTE eNB is connected to the EPC through the S1 interface (including the S1-C interface and the S1-U interface), and the LTE eNB is connected to the gNB through the X2 interface. Different from the Option 3 communication system, in the Option 3A communication system, the gNB is also connected to the EPC through the S1-U interface. In order to facilitate the distinction, the dotted line in Figure 1 indicates the connection of the control plane.

NEDC is also called Option 4/4A. In the NEDC communication system, gNB is MN, ng-eNB is SN, and MN is connected to 5GC, MN and SN provide air interface transmission resources for data between the terminal and 5GC.

As shown in Figure 2, (a) in Figure 2 is a schematic structural diagram of the Option 4 communication system, and (b) in Figure 2 is a schematic structural diagram of the Option 4A communication system. In Option 4 communication system, gNB is connected to 5GC through NG interface (including NG-C interface and NG-U interface), and ng-eNB is connected to gNB through Xn interface. Different from the Option 4 communication system, in the Option 4A communication system, the ng-eNB is also connected to the 5GC through the NG-U interface. In order to facilitate the distinction, the dashed line in Figure 2 indicates the connection of the control plane.

NG-ENDC is also called Option 7/7A/7X. In the NG-ENDC communication system, ng-eNB is MN, gNB is SN, and MN is connected to 5GC. Different from the above-mentioned ENDC communication system, in the NG-ENDC communication system, MN and SN provide air interface transmission resources for data between the terminal and 5GC.

As shown in FIG. 3, (a) in FIG. 3 is a schematic structural diagram of the Option 7 communication system, and (b) in FIG. 3 is a schematic structural diagram of the Option 7A communication system. In Option 7 communication system, ng-eNB is connected to 5GC through NG interface (including NG-C interface and NG-U interface), ng-eNB is connected to gNB through Xn interface. Different from the Option 7 communication system, in the Option 7A communication system, the gNB is also connected to the 5GC through the NG-U interface. In order to facilitate the distinction, the dashed line in Figure 3 indicates the connection of the control plane.

In practical applications, there is also a dual-connection communication system that supports NR and NR. Both MN and SN in the dual-connection communication system are gNB. Of course, there is also a dual-connection communication system that supports LTE and LTE, and the MN and SN in the dual-connection communication system are both LTE eNBs.

In a dual-connectivity communication system, the base station where the packet data convergence protocol (PDCP) entity of a certain radio bearer (RB) is located is called the PDCP anchor (anchor), and the master node (MN) The transmission path between) and the terminal is called MN link (MN link), MN leg (MN leg) or primary leg (main leg), and the transmission path between secondary node (SN) and terminal is called SN link Road (SN link), SN leg (SN leg) or auxiliary leg (auxiliary leg).

Generally, the protocol stack of the terminal includes the radio resource control (RRC) layer, the PDCP layer, the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (physical, PHY) layer. In the dual-connection communication system, the terminal can transmit through two air interfaces. Therefore, the terminal has two MAC entities. When the terminal transmits data through the air interface between the terminal and the primary station, the MAC entity corresponding to the primary station is used; when the terminal transmits data through the air interface between the terminal and the secondary station, the MAC entity corresponding to the secondary station is used. Each MAC entity can communicate with multiple RLC entities.

The master station may provide air interface transmission resources for the terminal through multiple cells, and the multiple cells form a master cell group (MCG). Correspondingly, the secondary station may also provide air interface transmission resources for the terminal through multiple cells, and the multiple cells form a secondary cell group (SCG).

In the dual connectivity communication system, there are two types of radio bearers for the UE. Among them, the first type is the PDCP terminated bearer on the MN (MN terminated bearer), referred to as MN bearer for short. The PDCP on the base station side of this bearer is deployed on the MN, and the PDCP of the MN performs security-related processing; PDCP terminates the bearer on the SN (SN terminated bearer), referred to as SN bearer. The PDCP on the base station side of this bearer is deployed on the SN, and the PDCP of the SN performs security-related processing. Both the PDCP protocol data unit (protocol data unit, PDU) carried by the MN and the SN can be sent through MN air interface resources and/or SN air interface resources. When sending only through MN air interface resources, it is called MCG bearer; when sending only through SN air interface resources, it is called SCG bearer; when both MN air interface resources and SN air interface resources are used for sending, it is called split bearer. At the time, if it is MN bearer, it is MCG split bearer, if it is SN bearer, it is SCG split bearer. For split bearers, MCG and SCG transmit the same PDCP PDU. The base station can configure split SRB 1 and split SRB 2 for the UE, that is, configure SRB 1 and SRB 2 as split bearers. At this time, the RRC message of SRB 1/SRB 2 sent by the UE can be transmitted through MCG or SCG.

In addition, the SN can also be configured with the SRB3 of the UE, so that the UE can directly exchange RRC messages with the SN through the SRB3. Specifically, the RRC message of SRB3 can only be transmitted through SCG.

For split SRB (for example, split SRB 1 or split SRB 2), both the primary station and the secondary station configure an RLC bearer for the terminal. The RLC bearer includes an RLC entity associated with the SRB or DRB and a logical channel (logical channel, LC) of the MAC layer. The terminal has an RRC entity (entity) corresponding to the MN, and the RRC message generated by the RRC entity is processed by the PDCP entity corresponding to the split SRB and can be transmitted through the RLC bearer corresponding to the MN or the RLC bearer corresponding to the SN. That is, for a split SRB, both the data from the primary station and the data from the secondary station can be processed by a unified PDCP entity, and the PDCP entity corresponds to the split SRB.

For SRB3, the terminal has an RRC entity corresponding to the SN, and the RRC message generated by the RRC entity is processed by the PDPC entity corresponding to SRB3, and then transmitted through the RLC bearer corresponding to the SN.

Exemplarily, for the communication system shown in FIG. 1 or FIG. 3, the primary station is an LTE base station, and the secondary station is a gNB, and FIG. 4 shows the control plane protocol stack of the terminal in the communication system. As shown in Figure 4, the terminal includes an evolved UMTS terrestrial radio access (evolved universal terrestrial radio access, E-UTRA) MAC entity and an NR MAC entity. The data processed by the E-UTRA MAC entity can be transmitted to E-UTRA RLC. Entity, NR MAC entity processed data can be transmitted to NR RLC entity, E-UTRA RLC entity and NR RLC entity processed data can be transmitted to the NR PDCP entity corresponding to the split SRB, the dotted line in Figure 4 indicates the NR RLC entity Communication with the NR PDCP entity corresponding to the split SRB. Subsequently, the data processed by the NR PDCP entity corresponding to the split SRB is transmitted to the RRC entity configured for the split SRB. For SRB3, the data processed by the NR RLC entity can be transmitted to the NR PDCP entity corresponding to SRB3, and subsequently, the data processed by the NR PDCP entity corresponding to SRB3 is transmitted to the RRC entity configured for SRB3.

In a dual-connection communication system, when the UE transmits data through MCG and SCG, MCG or SCG may fail/abnormal, such as reconfiguration failure, handover failure, integrity check failure, etc.

If the SCG fails, the UE suspends the transmission of the SCG and sends an SCG failure report to the MN to notify the MN that the UE has an abnormal situation in the SCG. In the future, the MN uses any of the following Follow-up processing is carried out in the following manner: 1. MN sends an SCG failure report to SN, requesting SN to reconfigure the UE; 2. MN determines that UE replaces SN and triggers the process of replacing SN; 3. MN releases the SN.

If the MCG fails, in addition to the data radio bearer (DRB) configuration, the UE releases the source SCG configuration and performs cell selection. The base station to which the cell selected by the UE belongs (referred to as the reselection base station) for the UE Reconfiguration is performed to complete the communication between the UE and the reselected base station. Later, the SN can also be reconfigured for the UE.

However, in the above method, the process time for the terminal to configure the reselection of the base station is long, and the configuration rate is low, which reduces the communication rate.

In addition, in a dual-connection communication system, if the current communication quality is poor, the source MN can determine to hand over the terminal to the target base station. The target base station reconfigures the terminal and deletes the configuration information of the source SCG. Correspondingly, the terminal releases the communication with the source MN and the source SN.

However, in the above method, the process time for the terminal to configure the target base station is relatively long, and the configuration rate is low, which reduces the communication rate.

In response to the above problems, the embodiments of the present application provide a communication method, device, and system. For a communication system that includes a first subsystem (the subsystem includes a source master station and a source auxiliary station that provide services for terminals) and a second subsystem (This subsystem includes a target master station that can provide services to the terminal, and optionally, a target auxiliary station that can provide services to the terminal). If the network standard of the target master station is the same as that of the source auxiliary station, change When the terminal switches to the target master station, it retains the SCG configuration information of the source slave station and configures the MCG of the target master station according to the SCG configuration information of the source slave station to realize the terminal switch, so that the terminal and the target master station Station communication. In the embodiment of this application, the configuration of the MCG of the target primary station is performed according to the configuration information of the SCG of the source secondary station. Compared with the need to reconfigure the target primary station in the prior art, the embodiment of this application effectively Reduce time consumption, improve configuration rate and communication rate.

The communication method provided by the embodiment of the present application is applicable to a communication system including a first subsystem and a second subsystem. Both the first subsystem and the second subsystem may be the MR-DC communication shown in FIGS. 1 to 3 above. The system may also be a dual-connection system of gNB and gNB, or a dual-connection communication system of eLTE eNB and eLTE eNB, which will not be listed here. In addition, the second subsystem may also be a single-connection communication system.

The above-mentioned source master station is the master station that provides services for the terminal in the first subsystem, and the source auxiliary station is the auxiliary station that provides services for the terminal in the first subsystem.

If the second subsystem is a dual-connection communication system, the second subsystem includes the target master station and the target auxiliary station, and the target master station is the master station that provides services for the terminal in the second subsystem, and the target auxiliary station is the second sub-station. The auxiliary station that provides services for the terminal in the system. If the second subsystem is a single-connection communication system, the second subsystem includes a target master station, and the target master station provides services for the terminal.

Exemplarily, if the first subsystem is as shown in Figure 2 above and the second subsystem is as shown in Figure 3 above, the source primary station is gNB, the source secondary station is ng-eNB, and correspondingly, the target primary station is ng -eNB, the target secondary station is gNB. If the first subsystem is as shown in Figure 3 above, the source primary station is ng-eNB, and the source secondary station is gNB.

Optionally, the communication method provided in the embodiments of this application can be applied to the scenario where the source master station or the source secondary station determines to switch the terminal to the target master station according to the measurement report sent by the terminal after the MCG fails, or it can also be applied to the MCG If there is no failure, the source primary station or the source secondary station directly determines the scenario of switching the terminal to the target primary station according to the measurement report sent by the terminal, which is not limited in the embodiment of the present application.

The primary station involved in the embodiment of the present application may be the above-mentioned gNB or the above-mentioned ng-eNB, which is not limited in the embodiment of the present application. In the same way, the secondary stations involved in the embodiments of the present application may all be the above-mentioned gNB or the above-mentioned ng-eNB, which is not limited in the embodiments of the present application.

In the embodiment of this application, the network standard of the target master station is the same as that of the source auxiliary station. If the second subsystem is a dual-connection communication system, the network standard of the target auxiliary station can be the same as that of the source master station. It can be the same as the network standard of the source and auxiliary stations.

Exemplarily, if the first subsystem is as shown in Figure 2 above, and the second subsystem is as shown in Figure 3 above, then the network standard of the target master station is the same as that of the source auxiliary station, and the network standard of the target auxiliary station is the same as that of the source auxiliary station. The network standard of the source master is the same.

Each of the above-mentioned devices in Figures 1 to 3 is a communication device. In specific implementation, the communication device has the components shown in FIG. 5. FIG. 5 is a schematic diagram of the composition of a communication device provided by an embodiment of the application. As shown in FIG. 5, the communication device may include a processor 51, a memory 52, a transceiver 53, and a bus 54. In the following, each component of the communication device is specifically introduced in conjunction with FIG. 5:

The processor 51 is the control center of the communication device, and may be a processor or a collective name for multiple processing elements. For example, the processor 51 is a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or is configured to implement one or more integrated circuits in the embodiments of the present application. Circuits, for example: one or more digital signal processors (DSP), or one or more field-programmable gate arrays (FPGA).

Among them, the processor 51 can execute various functions of the communication device by running or executing a software program stored in the memory 52 and calling data stored in the memory 52.

As an embodiment, the processor 51 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 5.

As an embodiment, the communication device may further include other processors, such as the processor 55 shown in FIG. 5. Each of the multiple processors in the communication device may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

The memory 52 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, disk storage The medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structure and that can be accessed by the computer, but is not limited thereto. The memory 52 may exist independently and is connected to the processor 51 through a bus 54. The memory 52 may also be integrated with the processor 51.

Among them, the memory 52 is used to store a software program for executing the solution of the present application, and the processor 51 controls the execution.

The transceiver 53 uses any device such as a transceiver to communicate with other equipment or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. . The transceiver 53 may include a receiving unit to implement a receiving function, and a transmitting unit to implement a transmitting function.

The bus 54 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in FIG. 5 to represent, but it does not mean that there is only one bus or one type of bus.

It should be pointed out that the device structure shown in FIG. 5 does not constitute a limitation on the communication device. In addition to the components shown in FIG. 5, the communication device may include more or less components than those shown in the figure, or a combination Certain components, or different component arrangements.

The communication method provided in the embodiment of the present application will be described below in conjunction with the communication system shown in FIGS. 1 to 3 and the communication device shown in FIG. 5. Among them, each device mentioned in the following method embodiments may have the component parts shown in FIG. 5, which will not be repeated.

FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of this application. Referring to Fig. 6, the communication method includes the following steps.

S600: The source master station sends a handover request message to the target master station.

After determining to switch the terminal to the target master station, the source master station sends a switching request message to the target master station to request the terminal to be switched to the target master station.

Optionally, if there is a direct interface between the source master station and the target master station, such as an X2 interface or an Xn interface, the source master station sends a handover request message to the target master station through the direct interface.

If there is no direct interface between the source master station and the target master station, the source master station sends a handover request message to the core network device connected to the source master station, and further, the core network device sends the handover request message to the target master station. Among them, the core network equipment connected to the source master station and the target master station may be the same or different.

Exemplarily, if the source master station is connected to the 4G core network device through the S1 interface, and the target master station is connected to the 5G core network device through the NG interface, the source master station sends a handover request message to the 4G core network device through the S1 interface and at the same time instructs the target master station After that, the 4G core network device sends the handover request message to the 5G core network device; in this way, the 5G core network device can send the switch request message to the target master station through the NG interface Handover request message.

Of course, for the scenario where the source master station is connected to the 5G core network equipment through the NG interface, and the target master station is connected to the 4G core network equipment through the S1 interface, or the source master station and the target master station are both connected to the core network equipment through the NG/S1 interface For connection scenarios, the process of sending the handover request message by the source master station can refer to the previous example.

The handover request message includes the network standard information of the source auxiliary station.

Optionally, the handover request message also includes the context of the terminal. Wherein, the context of the terminal may further include related configuration of the DC. For example, the context of the terminal includes information implicitly indicating the network standard of the source secondary station.

Exemplarily, if the first subsystem is as shown in FIG. 2 above, the network standard of the source and secondary station is evolved universal terrestrial radio access (E-UTRA). If the first subsystem is as shown in Figure 3 above, the network standard of the source and auxiliary stations is NR.

Optionally, the source master station may determine to switch the terminal to the target master station after obtaining the measurement report sent by the terminal, or the source master station receives the target master station's information sent by the source auxiliary station (for example, in MCG In the case of failure, the source secondary station determines the target master station according to the MCG failure information and measurement report sent by the terminal), and then determines to switch the terminal to the target master station and communicate with the target master station, or the source master station obtains After the measurement report and MCG failure information sent by the terminal, it is determined to switch the terminal to the target master station.

Among them, the MCG failure information is used to indicate MCG failure. The measurement report is a report based on the measurement configuration information sent by the source master station or the source slave station. For example, the measurement report is a report obtained by measuring a cell located at the frequency point of the source primary station.

The information of the target master station includes the identification of the target master station, or includes the identification of the target master station and the identification of the target cell. Here, the target cell is the primary serving cell after the terminal is handed over to the target primary station.

Further optionally, the MCG failure information is used to indicate the type of MCG failure. Specifically, the MCG failure type can be any of the following situations: the RLC corresponding to the MCG bearer exceeds the maximum number of retransmissions, the MCG has a radio link failure, the handover fails, the SRB on the master side fails the integrity check, and the master is used. The PDCP integrity check of the secret key of the station fails, and the reconfiguration on the master station side fails. Wherein, the aforementioned switching may be intra-system switching, intra-standard switching, cross-system switching or cross-standard switching. The foregoing integrity check failure may be the integrity check failure of the SRB or the integrity check failure of the DRB.

In the embodiment of the application, the method for the source master station to obtain the target report (measurement report, or measurement report and MCG failure information) may be: if the source master station is not configured with split SRB and the source slave station is configured with SRB3, the terminal can pass SRB3 Send the target report to the source auxiliary station, and subsequently, the source auxiliary station forwards the target report to the source master station. If the source master station is configured with a split SRB, the source master station receives the target report from the terminal through the split SRB.

The split SRB here can be pre-established, or can be established by the terminal through SRB3 (for this process, refer to the subsequent description of FIG. 10).

S601. If the target master station reserves resources for the terminal, the target master station sends a switching command to the source master station.

The target master station performs admission control after receiving the handover request message sent from the source master station. If the target master station can reserve resources for the terminal, the target master station sends a switching command to the source master station.

Specifically, after receiving the handover request message, the target master station acquires the network standard information of the source secondary station in the handover request message. Subsequently, the target master station determines whether the network standard of the target master station is the same as the network standard of the source auxiliary station. If the network standard of the target master station is the same as the network standard of the source auxiliary station, the switching command sent by the target master station to the source master station is used to instruct to configure the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station.

Exemplarily, as shown in Figure 7, the first subsystem is the NG-ENDC system, the second subsystem is the NR system, the source primary station is ng-eNB, the source secondary station is gNB, the target primary station is gNB, and the target primary The network standard of the station is the same as the network standard of the source auxiliary station, and the switching command sent by the target master station to the source master station is used to instruct to configure the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station.

The switching command can be embodied in the following implementation manner:

In an optional implementation manner, the handover command includes first indication information, and the first indication information is used to indicate that the configuration information of the SCG of the source secondary station is used as the configuration information of the MCG of the target primary station. It can be understood that the first indication information is used to indicate to upgrade the configuration information of the SCG of the source secondary station to the configuration information of the MCG of the target primary station.

Optionally, the first indication information may be embodied in a direct (or called explicit) or indirect (or called implicit) manner, which is not limited in the embodiment of the present application.

In another optional implementation manner, the switching command includes first configuration increment information, and the first configuration increment information is used to configure the MCG of the target primary station in combination with the configuration information of the SCG of the source secondary station.

In another optional implementation manner, the handover command includes first full configuration indication information, and the first full configuration indication information is used to instruct to reconfigure the MCG of the target primary station. If the switching command does not include the first full configuration indication information, the switching command is used to instruct to configure the MCG of the target primary station according to the configuration information of the SCG of the source secondary station.

Further, if the second subsystem also includes the target auxiliary station, the target master station can obtain the network standard of the target auxiliary station. The target master station can obtain the network standard of the source master station by receiving the handover request message. After obtaining the network standard of the source master station, the target master station also determines whether the network standard of the target auxiliary station is the same as the network standard of the source master station. If the network standard of the target auxiliary station is the same as the network standard of the source master station, the switching command sent by the target master station to the source master station is also used to instruct to configure the SCG of the target auxiliary station according to the configuration information of the MCG of the source master station .

Exemplarily, as shown in Figure 8, the first subsystem is the NG-ENDC system, the second subsystem is the NE-DC system, the source primary station is ng-eNB, the source secondary station is gNB, and the target primary station is gNB. The target secondary station is ng-eNB. The network standard of the target master station is the same as the network standard of the source auxiliary station, and the network standard of the target auxiliary station is the same as that of the source master station. The switching command sent by the target master station to the source master station is used to indicate the The configuration information of the SCG configures the MCG of the target master station, and can also be used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source master station.

Correspondingly, the switching command can also be embodied in the following implementation manner:

In an optional implementation manner, the handover command further includes second indication information, which is used to indicate that the MCG configuration information of the source primary station is used as the SCG configuration information of the target secondary station. It can be understood that the second indication information is used to indicate to upgrade the configuration information of the MCG of the source primary station to the configuration information of the SCG of the target secondary station.

Optionally, the second indication information may be embodied in a direct (or called explicit) or indirect (or called implicit) manner, which is not limited in the embodiment of the present application.

In another optional implementation manner, the handover command further includes second configuration increment information, and the second configuration increment information is used to configure the SCG of the target secondary station in combination with the configuration information of the MCG of the source primary station.

In another optional implementation manner, the handover command includes second full configuration indication information, and the second full configuration indication information is used to instruct to reconfigure the SCG of the target secondary station. If the switching command does not include the second full configuration indication information, the switching command is used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.

Further optionally, if the source secondary station has configured SRB3 and the target secondary station does not support SRB3, the handover command sent by the target primary station also includes a release indication or capability information. The release indication is used to indicate the release of the configured SRB3, capability information Used to indicate that the target secondary station does not support SRB3, so that after receiving the handover command, the terminal can release the configured SRB3 according to the release instruction or capability information.

Wherein, the foregoing capability information may be an implicit indication. Taking the NE-DC system as the second subsystem as an example, since the secondary station ng-NB of the NE-DC system does not support SRB3, the terminal can determine that the target secondary station does not support SRB3 after acquiring the information of the target secondary station.

S602: The source master station sends a switching command to the terminal.

In a possible implementation manner, the source master station sends a handover command to the terminal through MCG.

In another possible implementation manner, the source master station determines that the MCG of the terminal fails, and sends a handover command to the terminal through the source auxiliary station.

In an example, if the terminal is configured with a split SRB, the source master station sends a handover command to the terminal through the split SRB.

In another example, if the source secondary station informs the source primary station that the source secondary station has been configured with SRB3, the source primary station may send a switching command to the source secondary station, and subsequently, the source secondary station sends the switching command to the terminal through the SRB3.

S603. In response to the switching command, the terminal configures the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station, so as to realize communication with the target master station.

If the second subsystem also includes the target auxiliary station, the terminal in the embodiment of the present application also configures the SCG of the target auxiliary station according to the configuration information of the MCG of the source master station to realize communication with the target auxiliary station. As shown in FIG. 6, after S602, S604 may be executed.

S604 (optional): The terminal configures the SCG of the target auxiliary station according to the configuration information of the MCG of the source master station, so as to realize communication with the target auxiliary station.

Since S604 is optional, it is represented by a dashed frame in FIG. 6.

It can be seen from the above description that if the source secondary station has configured SRB3 and the target secondary station does not support SRB3, the handover command sent by the target primary station can also include release indication or capability information. In this way, the terminal can receive the handover command. Release the configured SRB3 according to the release instruction or capability information.

As shown in Fig. 6, after S602, S605 may be executed.

S605 (optional). The terminal releases the configured SRB3.

Since S605 is optional, it is represented by a dashed frame in FIG. 6.

In an example, as shown in FIG. 7, after receiving the handover command, the terminal releases the configuration information of the source master station, and configures the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station. The source auxiliary station in Fig. 7 has been configured with SRB3. Since there is no target auxiliary station, the terminal also releases the configured SRB3.

In addition, the terminal in Figure 7 can also retain the configuration information of the SDAP entity and the configuration information of the NR PDCP entity corresponding to the source master station, and subsequently configure the NR PDCP entity and SDAP entity in the target master station according to the configuration information .

In another example, as shown in Figure 8, after receiving the handover command, the terminal configures the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station, and configures the target master station according to the configuration information of the MCG of the source master station The SCG of the auxiliary station is configured. The source secondary station in FIG. 8 has been configured with SRB3. Since the target secondary station in FIG. 8 does not support SRB3, the terminal also releases the configured SRB3.

In addition, the terminal in Figure 8 can also retain the configuration information of the SDAP entity and the configuration information of the NR PDCP entity corresponding to the source master station, and subsequently configure the NR PDCP entity and SDAP entity in the target master station according to the configuration information .

In summary, the configuration of the MCG of the target master station by the terminal in the embodiment of the application is performed according to the configuration information of the SCG of the source auxiliary station. Compared with the prior art, the target master station needs to be reconfigured. The application embodiment effectively reduces time consumption and improves the configuration rate and communication rate.

According to the above description, the source master station may determine to switch the terminal to the target master station after obtaining the measurement report sent by the terminal, or the source master station may determine to switch the terminal to the target master station after receiving the target master station information sent by the source auxiliary station. The terminal switches to the target master station and communicates with the target master station, or the source master station determines to switch the terminal to the target master station after obtaining the measurement report and MCG failure information sent by the terminal.

With reference to Fig. 6 above, as shown in Fig. 9, before S600, S901 or S902 may also be included.

S901. The source master station obtains a target report, and determines to switch the terminal to the target master station according to the target report.

The target report includes MCG failure information. Further, the target report may also include a measurement report.

For the method for the source master station to obtain the target report, reference may be made to the description of the above S600, which will not be repeated here.

S902: The source auxiliary station sends the target master station information to the source master station.

Specifically, the source secondary station receives the target report sent by the terminal, and determines to switch the terminal to the target primary station according to the target report, and subsequently, the source secondary station sends the target primary station information to the source primary station.

Further optionally, the source secondary station also sends MCG failure information to the target primary station.

Since both S901 and S902 are used by the source master station to obtain the information of the target master station, one of them is selected for execution. Fig. 9 shows S902 with a dotted line.

In the process shown in Figure 6/9, the network standard of the target master station is the same as the network standard of the source auxiliary station, the network standard of the target auxiliary station is the same as the network standard of the source master station, and the target master station and the source auxiliary station For different devices, the target auxiliary station and the source master station are different devices.

In practical applications, the network standard of the target master station and the network standard of the target auxiliary station can be the same as the network standard of the source auxiliary station. In addition, the target master station and the source auxiliary station can be the same device, and the target auxiliary station and the source master station can also be the same device.

If the target master station and the source auxiliary station are different devices, and the network standards of the two are the same, in a scenario where the network standards of the target master station and the target auxiliary station are the same as those of the source auxiliary station, the target master station The switching command sent to the source master station can be used to instruct the MCG of the target master station to be configured according to the configuration information of the SCG of the source auxiliary station, or it can be used to indicate the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station. Configure with the SCG of the target auxiliary station.

If the switching command is used to instruct the MCG of the target master station to be configured according to the configuration information of the SCG of the source auxiliary station, the terminal configures the MCG of the target master station according to the configuration information of the SCG of the source auxiliary station. This process can refer to the above Description of Figure 6/Figure 9. Subsequently, after the target master station is configured, the target auxiliary station is reconfigured.

If the switching command is used to instruct to configure the MCG of the target primary station and the SCG of the target secondary station according to the configuration information of the SCG of the source secondary station, the terminal can be based on the configuration information of the SCG of the source secondary station and increment according to the corresponding configuration The information configures the MCG of the target primary station, uses the configuration information of the SCG of the source secondary station as the configuration information of the SCG of the target secondary station, and configures the SCG of the target secondary station using the configuration information of the SCG of the source secondary station.

If the target master station and the source slave station are the same device, the source slave station receives the handover request message sent by the source master station. Accordingly, the source slave station generates a handover command and sends the handover command to the terminal, indicating that the source slave station As the target master station after switching. Optionally, the source secondary station can send the switch command to the terminal through SRB3, or the source secondary station sends the switch command to the source master station, and then the source master station sends the switch command to the terminal through the split SRB, or through the SCG of the split SRB The bearer sends a handover command to the terminal. Optionally, the switching command may be used to instruct to configure the MCG of the target primary station according to the configuration information of the SCG of the source secondary station. For details, refer to the description of S603 above. Further optionally, the switching command may also instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station. Correspondingly, the terminal completes the corresponding configuration according to the switching command, upgrades the source auxiliary station to the master station, and communicates with it.

The following describes the scenario where the target master station and the source auxiliary station are the same device. For ease of understanding, the MCG fails and the terminal is switched from the source master station to the source auxiliary station as an example. As shown in FIG. 10, the communication method provided by the embodiment of the present application includes:

S1000, the terminal monitors the MCG, and after determining that the MCG fails, sends the MCG failure information to the source master station/source auxiliary station.

MCG failure refers to at least one of reconfiguration failure, handover failure, integrity check failure, radio link failure, exceeding the maximum number of RLC retransmissions, or random access failure.

Wherein, the aforementioned switching may be intra-system switching, intra-standard switching, cross-system switching or cross-standard switching. The foregoing integrity check failure may be the integrity check failure of the SRB or the integrity check failure of the DRB, where the SRB or the DRB may correspond to the source master station.

Optionally, if the terminal determines that the MCG fails, the terminal suspends the transmission of the MCG, including transmission of all SRBs and DRBs, for example, suspends the MCG bearer of all SRBs and DRBs.

Further optionally, the terminal suspends the transmission of the SCG carried by the DRB.

After determining that the MCG fails, the terminal sends MCG failure information to the source primary station/source secondary station, and further, the terminal may also send a measurement report.

If the terminal is configured with a split SRB, the terminal can send MCG failure information and measurement reports to the source master station through the split SRB, so that the source master station determines whether to switch and whether to switch to the source secondary station based on the MCG failure information and the measurement report.

If the terminal is configured with SRB3, the terminal can send MCG failure information and measurement reports to the source secondary station through SRB3. Subsequently, the source secondary station can determine whether to handover and whether to handover to its own cell (ie, handover to the source secondary station) based on the MCG failure information and measurement report, and can also send MCG failure information and measurement reports to the source primary station to facilitate the source The master station determines whether to switch and whether to switch to the source auxiliary station according to the MCG failure information and the measurement report.

It is easy to understand that if the source auxiliary station determines to switch the terminal to the source auxiliary station based on the MCG failure information and the measurement report, the source auxiliary station sends the source auxiliary station information to the source master station to notify the source master station to switch the terminal to Yuan Auxiliary Station.

Since the terminal can send MCG failure information and measurement reports to the source primary station, or to the source secondary station, it is one of them. The dotted line in Figure 10 indicates that the terminal failed to send MCG to the source secondary station. For information and measurement reports, a solid line is used to indicate that the terminal sends MCG failure information and measurement reports to the source master station, which means that the terminal chooses a method to send MCG failure information and measurement reports.

S1001. The source master station determines to switch the terminal to the source auxiliary station.

An alternative method is that the source master station determines to switch the terminal to the source auxiliary station. Optionally, the source master station determines to switch the terminal to the source auxiliary station based on the obtained MCG failure information and measurement report; or, the source master station obtains the source auxiliary station information sent by the source auxiliary station and determines to switch the terminal to Yuan Auxiliary Station.

Another alternative is that the source auxiliary station determines to switch the terminal to the source auxiliary station and informs the source master station.

In this scenario, the source-auxiliary station provides standalone access, that is, the source-auxiliary station supports the ability to independently provide services for the terminal.

S1002. The source master station sends a handover request message to the source auxiliary station.

In the case where the source master station determines to switch the terminal to the source auxiliary station, the switching request message is used to request the terminal to be switched to the source auxiliary station.

In the case that the source secondary station determines to switch the terminal to the source secondary station, the handover request carries the context of the terminal.

S1003. The source auxiliary station sends a switching command to the terminal.

In an implementation manner, if the source auxiliary station is configured with SRB3, the source auxiliary station sends a handover command to the terminal through SRB3.

In another implementation, if the source master station is configured with split SRB, the source auxiliary station can send a handover command to the terminal through the source master station.

Optionally, the switching command is used to instruct to upgrade the configuration information of the SCG of the source secondary station to the configuration information of MCG, that is, configure the MCG of the target primary station (ie the source secondary station) according to the configuration information of the SCG of the source secondary station .

Optionally, the switching command also includes secret key update information, which is used to derive the secret key used after switching to the source secondary station.

Exemplarily, the handover command is embodied in an RRC reconfiguration message.

S1004. The terminal upgrades the source auxiliary station to the master station according to the switching command.

Optionally, the terminal upgrades the source auxiliary station to the master station according to the configuration information of the SCG of the source auxiliary station.

Exemplarily, the first subsystem is the NG-ENDC system, the source primary station is ng-eNB, the source secondary station is gNB, and the source secondary station is configured with SRB3. After receiving the handover command, the terminal releases the configured SRB3 and The RLC bearer in the source MCG is established, and the RLC bearer corresponding to the source secondary station is established, and the RRC entity of the terminal is associated with the source secondary station, so that the source secondary station can be upgraded to the primary station to realize the communication between the terminal and the source secondary station.

Optionally, if the terminal suspends the transmission of the SCG bearer of the DRB in S1000, after receiving the handover command, the terminal applies the updated secret key to resume data transmission with the source secondary station, for example, resume the SCG bearer corresponding to the DRB Transmission.

When the terminal resumes SCG bearer transmission, the terminal does not perform random access to the source secondary station.

Further optionally, the terminal immediately resets the MAC corresponding to the source SCG after suspending the SCG bearer, or after receiving the handover command, the terminal performs the MAC reset before resuming the transmission of the suspended SCG bearer.

In the embodiment of this application, in the case of MCG failure, the source master station or the source auxiliary station decides to switch the terminal to the target master station to avoid the terminal from initiating the re-establishment process, which effectively reduces the failure of the terminal to resume data transmission in the case of MCG failure. time.

Further, the terminal in the embodiment of the present application can also retain the source configuration information, and configure the target master station/target auxiliary station in combination with the retained source configuration information according to requirements, which effectively reduces time consumption and improves the configuration rate and communication rate.

In combination with the foregoing description, it can be seen that the split SRB of the source primary station in the embodiment of the present application may be pre-established, or may be established by the terminal through the SRB3 of the source secondary station. Now, the method for the terminal to establish a split SRB through the SRB3 of the source and secondary station is described.

Take MCG failure, the source master station is not configured with split SRB, and the source slave station is configured with SRB3 as an example. As shown in FIG. 11, the communication method provided by the embodiment of the present application includes:

S1100: The terminal monitors the MCG and judges whether the MCG fails.

Optionally, MCG failure refers to at least one of reconfiguration failure, handover failure, integrity check failure, radio link failure, exceeding the maximum number of RLC retransmissions, or random access failure.

If the terminal determines that the MCG fails, it continues to perform S1101 and subsequent steps. Optionally, if the MCG fails, the terminal suspends the transmission of the MCG, including the transmission of all SRBs and DRBs, for example, suspends the MCG bearer of all SRBs and DRBs. Further optionally, the terminal suspends the transmission of the SCG carried by the DRB.

S1101. The terminal judges whether to configure a split SRB.

S1102. If the split SRB is not configured, the terminal obtains target configuration information for configuring the split SRB.

In an implementation manner, if the split SRB is not configured, the terminal configures the split SRB according to pre-specified configuration information, where the target configuration information is pre-specified. In this case, S1102 is specifically S1102a.

In another implementation manner, if the split SRB is not configured, the terminal sends an establishment instruction to the source secondary station through SRB3 to trigger the secondary station to establish the split SRB (S1102b); accordingly, the source secondary station obtains target configuration information (S1102c) ), and send target configuration information to the terminal through SRB3 (S1102d). In addition, the source secondary station also sends to the terminal indication information for instructing the terminal to establish the RLC bearer of the SCG corresponding to the split SRB. The indication information can be embodied in a direct (that is, explicit) or indirect (that is, implicit) manner.

Since S1102a and S1102b to S1102d are parallel schemes, S1102b to S1102d are represented by dotted lines in FIG. 11.

If the terminal obtains the target configuration information by executing S1102b to S1102d, the source secondary station can also send an establishment message to the source primary station to notify the source primary station that the split SRB has been established (S1102'). Since S1102' is an optional step, it is represented by a dotted line in Figure 11.

S1103. The terminal configures according to the target configuration information to establish a split SRB.

S1104. The terminal sends MCG failure information to the source and secondary station by splitting the SRB.

The description of the MCG failure information can refer to the description of the above S600, which will not be repeated here.

S1105. The source auxiliary station forwards the MCG failure information to the source master station.

Optionally, when the source secondary station sends the MCG failure information to the source primary station, it can also send an establishment message to the source primary station to indicate that the split SRB has been established.

The terminal establishes a split SRB through SRB3, so that subsequent source and secondary stations do not need to perceive and parse MCG failure information, and can send MCG failure information to the source primary station through the established split SRB, which effectively reduces the burden on the source and secondary stations.

An embodiment of the present application provides a communication device 12. The communication device 12 may be a source master station or part of a device in the source master station, such as a chip system in the source master station. Optionally, the chip system is used to support the source master station to implement the functions involved in the foregoing method embodiments, for example, receiving, sending, or processing the data and/or information involved in the foregoing method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

The communication device 12 is used to execute the steps performed by the source master station in the method shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11 above. The communication device 12 provided in the embodiment of the present application may include modules corresponding to corresponding steps.

The embodiment of the present application may divide the communication device 12 into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. The division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of dividing each functional module corresponding to each function, FIG. 12 shows a possible schematic structural diagram of the communication device 12 in this embodiment. As shown in FIG. 12, the communication device 12 includes a sending unit 121 and a receiving unit 122.

The sending unit 121 is used to support the communication device 12 to perform the sending operations shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11, for example: S600, S602, S702, etc., and/or for the technology described herein Other processes.

The receiving unit 122 is used to support the communication device 12 to perform the receiving operations shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11, for example: S601, S902, S1102', S1105, etc., and/or used in the description herein Other processes of the technology.

Among them, all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.

Of course, the communication device 12 provided in the embodiment of the present application includes but is not limited to the aforementioned modules. For example, the communication device 12 may also include a processing unit 123 and a storage unit 124.

The processing unit 123 is configured to support the communication device 12 to perform operations such as obtaining shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11, such as S901, etc., and/or other processes used in the technology described herein.

The storage unit 124 may be used to store the program code of the communication device 12, and may also be used to store the network standard information of the source auxiliary station.

For the physical block diagram of the communication device 12 provided in this application, reference may be made to FIG. 5 above. The foregoing sending unit 121 and receiving unit 122 may be the transceiver 53 in FIG. 5, the processing unit 123 may be the processor 51 in FIG. 5, and the storage unit 124 may be the memory 52 in FIG.

Another embodiment of the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium. When the instructions are executed on the communication device 12, the communication device 12 executes as shown in FIG. 6, FIG. 9, and FIG. 10 or the steps of the source master station in the communication method of the embodiment shown in FIG. 11.

In another embodiment of the present application, a computer program product is also provided. The computer program product includes computer-executable instructions that are stored in a computer-readable storage medium; the processor of the communication device 12 can be accessed from a computer The reading storage medium reads the computer-executed instruction, and the processor executes the computer-executed instruction to make the communication device 12 execute the steps of the source master station in the communication method of the embodiment shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11.

An embodiment of the present application provides a communication device 13, which may be a target master station, or part of the device in the target master station, such as a chip system in the target master station. Optionally, the chip system is used to support the target master station to implement the functions involved in the foregoing method embodiments, for example, receiving, sending, or processing data and/or information involved in the foregoing method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

The communication device 13 is used to execute the steps performed by the target master station in the method shown in FIG. 6, FIG. 9 or FIG. 10. The communication device 13 provided in the embodiment of the present application may include modules corresponding to corresponding steps.

The embodiment of the present application may divide the communication device 13 into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. The division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of dividing each functional module corresponding to each function, FIG. 13 shows a possible structural diagram of the communication device 13. As shown in FIG. 13, the communication device 13 includes a receiving unit 131 and a sending unit 132.

The receiving unit 131 is used to support the communication device 13 to perform the receiving operation shown in FIG. 6, FIG. 9 or FIG. 10, such as S600, etc., and/or other processes used in the technology described herein.

The sending unit 132 is used to support the communication device 13 to perform the sending operation shown in FIG. 6, FIG. 9 or FIG. 10, such as S601, etc., and/or other processes used in the technology described herein.

Of course, the communication device 13 provided in the embodiment of the present application includes but is not limited to the aforementioned modules. For example, the communication device 13 may also include a processing unit 133 and a storage unit 134.

The processing unit 133 is configured to support the communication device 13 to perform operations such as "reserving resources for the terminal", and/or other processes used in the technology described herein.

The storage unit 134 can be used to store the program code of the communication device 13, and can also be used to store the network standard of the source master station, etc.

For the physical block diagram of the communication device 13 provided in this application, reference may be made to FIG. 5 above. The foregoing receiving unit 131 and sending unit 132 may be the transceiver 53 in FIG. 5, the processing unit 133 may be the processor 51 in FIG. 5, and the storage unit 134 may be the memory 52 in FIG.

Another embodiment of the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium. When the instructions are executed on the communication device 13, the communication device 13 executes as shown in FIG. 6, FIG. 9 or FIG. Steps of the target master station in the communication method of the embodiment shown in 10.

In another embodiment of the present application, a computer program product is also provided. The computer program product includes computer-executable instructions, which are stored in a computer-readable storage medium; the processor of the communication device 13 can be accessed from the computer. The reading storage medium reads the computer-executed instruction, and the processor executes the computer-executed instruction to make the communication device 13 execute the steps of the target master station in the communication method of the embodiment shown in FIG. 6, FIG. 9 or FIG.

An embodiment of the present application provides a communication device 14, which may be a terminal or part of a device in the terminal, such as a chip system in the terminal. Optionally, the chip system is used to support the terminal to implement the functions involved in the foregoing method embodiments, for example, receiving, sending, or processing the data and/or information involved in the foregoing method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

The communication device 14 is used to execute the steps executed by the terminal in the method shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11. The communication device 14 provided in the embodiment of the present application may include modules corresponding to corresponding steps.

The embodiment of the present application may divide the communication device 14 into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. The division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of dividing each functional module corresponding to each function, FIG. 14 shows a possible schematic structural diagram of the communication device 14. As shown in FIG. 14, the communication device 14 includes a receiving unit 141, a processing unit 142, and a sending unit 143.

The receiving unit 141 is configured to support the communication device 14 to perform the receiving operations shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11, such as S602, S1102d, etc., and/or other processes used in the technology described herein .

The processing unit 142 is used to support the communication device 11 to perform the configuration, release, and monitoring operations shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11, for example: S603, S604, S605, S1100, S1101, S1102a, etc., And/or other processes used in the techniques described herein.

The sending unit 143 is configured to support the communication device 14 to perform the sending operations shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11, such as S1102b, S1104, etc., and/or other processes used in the technology described herein .

Of course, the communication device 14 provided in the embodiment of the present application includes but is not limited to the aforementioned modules. For example, the communication device 14 may also include a storage unit 144. The storage unit 144 can be used to store the program code and data of the communication device 14.

For the physical block diagram of the communication device 14 provided in this application, reference may be made to FIG. 5 above. The foregoing receiving unit 141 and sending unit 143 may be the transceiver 53 in FIG. 5, the processing unit 142 may be the processor 51 in FIG. 5, and the storage unit 144 may be the memory 52 in FIG.

Another embodiment of the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium. When the instructions are executed on the communication device 14, the communication device 14 executes Figure 6, Figure 9, Figure 10 or the steps of the terminal in the communication method of the embodiment shown in FIG. 11.

In another embodiment of the present application, a computer program product is also provided. The computer program product includes computer-executable instructions that are stored in a computer-readable storage medium; the processor of the communication device 14 can be accessed from a computer Reading the storage medium reads the computer-executed instruction, and the processor executes the computer-executed instruction to cause the communication device 14 to execute the steps of the terminal in the communication method of the embodiment shown in FIG. 6, FIG. 9, FIG. 10, or FIG. 11.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it may appear in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. Computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions may be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data first access network device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), or a semiconductor medium (for example, a solid state disk (SSD)).

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be It can be combined or integrated into another device, or some features can be omitted or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate. The parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, which are stored in a storage medium There are several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any change or replacement within the technical scope disclosed in this application shall be covered by the protection scope of this application . Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A communication method, characterized in that it is applied to a communication system including a first subsystem and a second subsystem, the first subsystem includes a source master station and a source auxiliary station, and the source master station and the source auxiliary station are terminals To provide services, the second subsystem includes a target master station, the network standard of the target master station is the same as the network standard of the source auxiliary station, and the communication method includes:

Sending, by the source master station, a handover request message to the target master station, where the handover request message is used to request to switch the terminal to the target master station, and the handover request message includes the network standard information of the source secondary station;

The source primary station receives a handover command from the target primary station, where the handover command is used to instruct to configure the primary cell group MCG of the target primary station according to the configuration information of the secondary cell group SCG of the source secondary station ；

The source master station sends the handover command to the terminal.
The communication method according to claim 1, wherein:

The handover command includes first configuration increment information, and the first configuration increment information is used to configure the MCG of the target primary station in combination with the configuration information of the SCG of the source secondary station;

or,

The handover command includes first indication information, and the first indication information is used to indicate that the configuration information of the SCG of the source secondary station is used as the configuration information of the MCG of the target primary station.
The communication method according to claim 1 or 2, wherein the handover request message further includes network standard information of the source primary station, the second subsystem further includes a target secondary station, and the target secondary station The network standard of is the same as the network standard of the source master station;

The handover command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.
The communication method according to claim 3, wherein:

The handover command includes second configuration increment information, and the second configuration increment information is used to configure the SCG of the target secondary station in combination with the configuration information of the MCG at the source primary station;

or,

The handover command includes second indication information, and the second indication information is used to indicate that the configuration information of the MCG of the source primary station is used as the configuration information of the SCG of the target secondary station.
The communication method according to any one of claims 1-4, wherein before the source master station sends a handover request message to the target master station, the communication method further comprises:

The source master station obtains a target report, the target report includes a measurement report, or the target report includes MCG failure information and a measurement report; the MCG failure information is used to indicate that the MCG of the source master station fails, A measurement report is a report obtained by measurement based on measurement configuration information sent by the source primary station or the source secondary station;

or,

The source primary station receives the information of the target primary station from the source secondary station, the information of the target primary station includes the identity of the target primary station, or includes the identity of the target primary station and the information of the target cell ID, the target cell is the primary serving cell after the terminal is handed over to the target primary station.
The communication method according to claim 5, wherein the source master station obtaining the target report comprises:

The source primary station receives the target report from the source secondary station;

or,

The source master station receives the target report from the terminal through split signaling radio bearer SRB.
The communication method according to any one of claims 1-6, wherein the source master station sending the handover command to the terminal comprises:

Sending, by the source master station, the handover command to the terminal via the source slave station;

or,

The source master station sends the handover command to the terminal through split signaling radio bearer SRB.
The communication method according to any one of claims 1-7, wherein:

The target primary station and the source secondary station are the same device.
A communication method, characterized in that it is applied to a communication system including a first subsystem and a second subsystem, the first subsystem includes a source master station and a source auxiliary station, and the source master station and the source auxiliary station are terminals To provide services, the second subsystem includes a target master station, the network standard of the target master station is the same as the network standard of the source auxiliary station, and the communication method includes:

The target master station receives a handover request message from the source master station, the handover request message is used to request the terminal to be switched to the target master station, and the handover request message includes the network standard information of the source secondary station ；

The target primary station sends a handover command to the source primary station, where the handover command is used to instruct to configure the primary cell group MCG of the target primary station according to the configuration information of the secondary cell group SCG of the source secondary station.
The communication method according to claim 9, wherein:

The handover command includes first configuration increment information; the first configuration increment information is used to configure the MCG of the target primary station in combination with the configuration information of the SCG of the source secondary station;

or,

The handover command includes first indication information; the first indication information is used to indicate that the configuration information of the SCG of the source secondary station is used as the configuration information of the MCG of the target primary station.
The communication method according to claim 9 or 10, wherein the handover request message further includes the network standard information of the source primary station, the second subsystem further includes a target secondary station, and the target secondary station The network standard of is the same as the network standard of the source master station;

The handover command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.
The communication method according to claim 11, wherein:

The handover command includes second configuration increment information; the second configuration increment information is used to instruct to configure the SCG of the target secondary station in combination with the configuration information of the MCG of the source primary station;

or,

The handover command includes second indication information; the second indication information is used to indicate that the configuration information of the MCG of the source primary station is used as the configuration information of the SCG of the target secondary station.
A communication method, characterized in that it is applied to a communication system including a first subsystem and a second subsystem, the first subsystem includes a source master station and a source auxiliary station, and the source master station and the source auxiliary station are terminals To provide services, the second subsystem includes a target master station, the network standard of the target master station is the same as the network standard of the source auxiliary station, and the communication method includes:

The terminal receives a handover command from the source primary station, where the handover command is used to instruct to configure the primary cell group MCG of the target primary station according to the configuration information of the secondary cell group SCG of the source secondary station;

In response to the handover command, the terminal configures the MCG of the target primary station according to the configuration information of the SCG of the source secondary station.
The communication method according to claim 13, wherein the second subsystem further comprises a target auxiliary station, and the network standard of the target auxiliary station is the same as the network standard of the source master station;

The handover command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station;

The communication method further includes:

The terminal configures the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.
The communication method according to claim 13 or 14, wherein the handover command further includes a release indication or capability information, and the release indication is used to indicate the release of the configured signaling radio bearer SRB3, and the capability information is used for Indicating that the target secondary station does not support SRB3; the communication method further includes:

The terminal releases the configured SRB3.
The communication method according to any one of claims 13-15, wherein the terminal receiving a handover command from the source master station comprises:

Receiving, by the terminal, the handover command sent by the source master station through a split signaling radio bearer SRB;

or,

The terminal receives the handover command sent by the source secondary station through the SRB3.
The communication method according to any one of claims 13-16, wherein before the terminal receives the handover command from the source master station, the communication method further comprises:

The terminal sends a target report to the source master station by splitting the SRB;

or,

The terminal sends a target report to the source secondary station through SRB3;

The target report is used to determine the target master station, the target report includes a measurement report, or the target report includes MCG failure information and a measurement report, and the MCG failure information is used to indicate the source master station If the MCG fails, the measurement report is a report obtained by measurement based on measurement configuration information sent by the source primary station or the source secondary station.
The communication method according to claim 16 or 17, wherein the communication method further comprises:

The terminal obtains target configuration information through SRB3, where the target configuration information is used to configure the split SRB;

The terminal configures according to the target configuration information, and establishes the split SRB.
The communication method according to claim 18, wherein said terminal acquiring target configuration information through SRB3 comprises:

Sending, by the terminal, an establishment instruction to the source secondary station through the SRB3, where the establishment instruction is used to trigger the establishment of the split SRB;

The terminal receives the target configuration information from the source secondary station through the SRB3.
A communication device, characterized in that, the communication device comprises a processor, the processor is configured to be coupled with a memory, read and execute instructions in the memory, so as to implement any one of claims 1-8. The communication method mentioned.
A communication device, characterized in that, the communication device comprises a processor, the processor is configured to be coupled with a memory, read and execute instructions in the memory, so as to implement any one of claims 9-12. The communication method mentioned.
A communication device, characterized in that the communication device comprises a processor, the processor is configured to be coupled with a memory, read and execute instructions in the memory, so as to implement any one of claims 13-19. The communication method mentioned.
A communication system, characterized in that the communication system comprises the communication device according to claim 20, the communication device according to claim 21, and the communication device according to claim 22.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium; when the instructions are run on a communication device, the communication device executes any one of claims 1-8 The communication method either executes the communication method according to any one of claims 9-12, or executes the communication method according to any one of claims 13-19.
A communication device, characterized in that it is applied to a communication system including a first subsystem and a second subsystem, the first subsystem includes a source master station and a source auxiliary station, and the source master station and the source auxiliary station are terminals To provide services, the second subsystem includes a target master station, the network standard of the target master station is the same as that of the source secondary station, the communication device is the source master station, and the communication device includes:

A sending unit, configured to send a handover request message to the target primary station, where the handover request message is used to request to switch the terminal to the target primary station, and the handover request message includes the network standard information of the source secondary station;

The receiving unit is configured to receive a handover command from the target primary station, where the handover command is used to instruct to configure the primary cell group MCG of the target primary station according to the configuration information of the secondary cell group SCG of the source secondary station ；

The sending unit is further configured to send the handover command to the terminal.
The communication device according to claim 25, wherein:

The handover command includes first configuration increment information, and the first configuration increment information is used to configure the MCG of the target primary station in combination with the configuration information of the SCG of the source secondary station;

or,

The handover command includes first indication information, and the first indication information is used to indicate that the configuration information of the SCG of the source secondary station is used as the configuration information of the MCG of the target primary station.
The communication device according to claim 25 or 26, wherein the handover request message further includes network standard information of the communication device, and the second subsystem further includes a target secondary station, The network standard is the same as the network standard of the communication device;

The switching command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the communication device.
The communication device according to claim 27, wherein:

The handover command includes second configuration increment information, and the second configuration increment information is used to configure the SCG of the target secondary station in combination with the configuration information of the MCG of the communication device;

or,

The handover command includes second indication information, and the second indication information is used to indicate that the configuration information of the MCG of the communication device is used as the configuration information of the SCG of the target secondary station.
The communication device according to any one of claims 25-28, wherein:

Before the communication device sends a handover request message to the target master station, the receiving unit is further configured to:

Obtain a target report, the target report includes a measurement report, or, the target report includes MCG failure information and a measurement report; the MCG failure information is used to indicate that the communication device has failed the MCG, and the measurement report is based on the A report obtained by measuring the measurement configuration information sent by the communication device or the source and secondary station;

or,

Receiving the information of the target primary station from the source secondary station, the information of the target primary station includes the identity of the target primary station, or includes the identity of the target primary station and the identity of the target cell, the target The cell is the primary serving cell after the terminal is handed over to the target primary station.
The communication device according to claim 29, wherein the receiving unit is specifically configured to:

Receiving the target report from the source auxiliary station;

or,

Receiving the target report from the terminal through split signaling radio bearer SRB.
The communication device according to any one of claims 25-30, wherein the sending unit is specifically configured to:

Sending the handover command to the terminal via the source secondary station;

or,

The handover command is sent to the terminal through split signaling radio bearer SRB.
The communication device according to any one of claims 25-31, wherein:

The target primary station and the source secondary station are the same device.
A communication device, characterized in that it is applied to a communication system including a first subsystem and a second subsystem, the first subsystem includes a source master station and a source auxiliary station, and the source master station and the source auxiliary station are terminals To provide services, the second subsystem includes a target master station, the network standard of the target master station is the same as that of the source auxiliary station, the communication device is the target master station, and the communication device includes:

The receiving unit is configured to receive a handover request message from the source primary station, the handover request message is used to request to switch the terminal to the target primary station, and the handover request message includes the network standard information of the source secondary station ；

The sending unit is configured to send a handover command to the source primary station, where the handover command is used to instruct to configure the primary cell group MCG of the target primary station according to the configuration information of the secondary cell group SCG of the source secondary station.
The communication device according to claim 33, wherein:

The handover command includes first configuration increment information; the first configuration increment information is used to configure the MCG of the target primary station in combination with the configuration information of the SCG of the source secondary station;

or,

The handover command includes first indication information; the first indication information is used to indicate that the configuration information of the SCG of the source secondary station is used as the configuration information of the MCG of the target primary station.
The communication device according to claim 33 or 34, wherein the handover request message further includes network standard information of the source primary station, the second subsystem further includes a target secondary station, and the target secondary station The network standard of is the same as the network standard of the source master station;

The handover command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.
The communication device according to claim 35, wherein:

The handover command includes second configuration increment information; the second configuration increment information is used to instruct to configure the SCG of the target secondary station in combination with the configuration information of the MCG of the source primary station;

or,

The handover command includes second indication information; the second indication information is used to indicate that the configuration information of the MCG of the source primary station is used as the configuration information of the SCG of the target secondary station.
A communication device, characterized in that it is applied to a communication system including a first subsystem and a second subsystem, the first subsystem includes a source master station and a source auxiliary station, and the source master station and the source auxiliary station are terminals To provide services, the second subsystem includes a target master station, the network standard of the target master station is the same as that of the source auxiliary station, the communication device is the terminal, and the communication device includes:

The receiving unit is configured to receive a handover command from the source primary station, where the handover command is used to instruct to configure the primary cell group MCG of the target primary station according to the configuration information of the secondary cell group SCG of the source secondary station ；

The processing unit is configured to configure the MCG of the target primary station according to the configuration information of the SCG of the source secondary station in response to the handover command received by the receiving unit.
The communication device according to claim 37, wherein the second subsystem further comprises a target auxiliary station, and the network standard of the target auxiliary station is the same as the network standard of the source master station;

The handover command is also used to instruct to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station;

The processing unit is further configured to configure the SCG of the target secondary station according to the configuration information of the MCG of the source primary station.
The communication device according to claim 37 or 38, wherein the handover command further includes a release indication or capability information, and the release indication is used to indicate the release of the configured signaling radio bearer SRB3, and the capability information is used for Indicates that the target secondary station does not support SRB3;

The processing unit is also used to release the configured SRB3.
The communication device according to any one of claims 37-39, wherein the receiving unit is specifically configured to:

Receiving the handover command sent by the source master station through split signaling radio bearer SRB;

or,

The handover command sent by the source secondary station is received through SRB3.
The communication device according to any one of claims 37-40, wherein the communication device further comprises a sending unit; before the receiving unit receives the handover command from the source master station, the sending unit Also used for:

Sending a target report to the source master station by splitting the SRB;

or,

Sending a target report to the source secondary station through SRB3;

The target report is used to determine the target master station, the target report includes a measurement report, or the target report includes MCG failure information and a measurement report, and the MCG failure information is used to indicate the source master station If the MCG fails, the measurement report is a report obtained by measurement based on measurement configuration information sent by the source primary station or the source secondary station.
The communication device according to claim 40 or 41, wherein the processing unit is further configured to:

Obtaining target configuration information through SRB3, where the target configuration information is used to configure the split SRB;

Configure according to the target configuration information, and establish the split SRB.
The communication device according to claim 42, wherein the processing unit is specifically configured to:

Sending an establishment instruction to the source secondary station through the SRB3, where the establishment instruction is used to trigger the establishment of the split SRB;

Receiving the target configuration information from the source secondary station through the SRB3.
A chip system, characterized in that the chip system is applied to a communication device; the chip system includes one or more interface circuits, and one or more processors; the interface circuit and the processor are interconnected by wires The interface circuit is used to receive a signal from the memory of the communication device and send the signal to the processor, and the signal includes a computer instruction stored in the memory; when the processor executes the computer When instructed, the communication device executes the communication method according to any one of claims 1-8, or executes the communication method according to any one of claims 9-12, or executes the communication method according to any one of claims 13-19 The communication method described in any one of.
A computer program product, characterized by comprising computer instructions, which when the computer instructions run on a communication device, cause the communication device to execute the communication method according to any one of claims 1-8, or execute The communication method according to any one of claims 9-12, or the communication method according to any one of claims 13-19 is implemented.