WO2022089660A1

WO2022089660A1 - Handover method, terminal and network-side device

Info

Publication number: WO2022089660A1
Application number: PCT/CN2021/132677
Authority: WO
Inventors: 徐晓东; 柴丽; 胡南
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2020-10-27
Filing date: 2021-11-24
Publication date: 2022-05-05
Also published as: CN114501556A

Abstract

Provided are a handover method, a terminal and a network-side device. The handover method, which is applied to a first terminal, comprises: sending a connection processing request to a network-side device, wherein the connection processing request is used for requesting a network side to establish a second connection with a second terminal, or used for requesting the network side to modify/reconfigure an existing connection between the network side and the second terminal to be the second connection, so as to handover or replicate or offload some or all services of a first terminal in a connected state to the second connection, or so as to bear some or all services of the first terminal in the connected state by using the second connection.

Description

Handover method, terminal and network side device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202011165533.7 filed in China on October 27, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present disclosure relates to the field of communication technologies, and in particular, to a handover method, a terminal, and a network side device.

Background technique

With the development of wireless communication technology, the same user may have two or even more than two communication terminals (for example, a mobile phone, a phone watch, a vehicle terminal, etc.). When a user uses one terminal (ie, the first terminal) to execute the wireless communication service, there is an application scenario in which the user needs to switch to another terminal (ie, the second terminal) to execute the wireless communication service.

In the related art, the handover between terminals is implemented based on the interface between the terminals or in a manner that the network side does not perceive, which can be achieved through short-distance communication instead of the mobile communication network, for example: based on the first terminal and the second terminal. The Bluetooth connection between the terminals realizes the transparent transmission of the data packets of the wireless communication service executed on the first terminal to the second terminal, thereby realizing the handover between the first terminal and the second terminal.

However, there may be an incompatibility between the first terminal and the second terminal, so that handover between terminals cannot be implemented based on an interface between terminals or a manner that is not perceived by the network side.

It can be seen from this that the method for implementing handover or traffic distribution between terminals based on an interface between terminals or a method that is not perceived by the network side has the defect of poor flexibility.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide a handover method, a terminal, and a network-side device, so as to realize the handover of services between terminals through a network and improve the flexibility of handover.

In order to solve the above-mentioned technical problems, the present disclosure is implemented as follows:

In a first aspect, an embodiment of the present disclosure provides a handover method for a first terminal, where the handover method includes:

Send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the existing connection between the network side and the second terminal It is the second connection, so as to switch, copy or offload some or all of the services in the first terminal connection state to the second connection, or use the second connection to carry the first terminal connection state. some or all of the business.

In a second aspect, an embodiment of the present disclosure provides a switching method for a network-side device, where the switching method includes:

receiving a connection processing request sent by the first terminal;

Switch or copy or offload part or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry part or all of the services in the first terminal connection state , the first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.

In a third aspect, an embodiment of the present disclosure provides a terminal, where the terminal includes: a processor and a transceiver;

The transceiver is used to send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side and the second terminal. The existing connection of the second terminal is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or the second connection is used to carry the second connection. Part or all of the services in the connection state of the first terminal.

In a fourth aspect, an embodiment of the present disclosure provides a network-side device, where the network-side device includes: a processor and a transceiver;

the transceiver, configured to receive a connection processing request sent by the first terminal;

The processor is configured to switch, copy or offload part or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry the first terminal connection Part or all of the services in the state, the first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.

In a fifth aspect, an embodiment of the present disclosure provides a terminal, where the terminal includes:

The first sending module is configured to send a connection processing request to the network side device, and the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side and the second terminal. The existing connection of the second terminal is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or the second connection is used to carry the second connection. Part or all of the services in the connection state of the first terminal.

In a sixth aspect, an embodiment of the present disclosure provides a network-side device, where the network-side device includes:

a first receiving module, configured to receive a connection processing request sent by the first terminal;

The switching module is used to switch, copy or offload part or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry the first terminal connection state The first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.

In a seventh aspect, an embodiment of the present disclosure provides a terminal, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program is implemented when executed by the processor The steps in the handover method according to the first aspect.

In an eighth aspect, an embodiment of the present disclosure provides a network-side device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program is executed by the processor When implementing the steps in the handover method described in the second aspect.

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

In this embodiment of the present disclosure, the first terminal sends a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side with the second terminal. The existing connection of the second terminal is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or to be carried by the second connection Part or all of the services in the connection state of the first terminal. In this embodiment, the first terminal sends a connection processing request to the network side device, so that part or all of the services in the connection state of the first terminal are switched, copied or distributed to the second terminal and the network side through the network side. On the second connection between the two terminals, that is, by performing wireless network handover on the network side, the service that is continuously executed on the first terminal is switched to be executed on the second terminal, and there is no need to base on the connection between the first terminal and the second terminal. The data transparent transmission function improves the flexibility of the switching method provided by the embodiment of the present application.

Description of drawings

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

1 is a flowchart of a first handover method provided by an embodiment of the present disclosure;

2 is a flowchart of a second handover method provided by an embodiment of the present disclosure;

FIG. 3 a is one of the structural diagrams of a network system to which an embodiment of the present disclosure can be applied;

FIG. 3b is the second structural diagram of a network system to which an embodiment of the present disclosure can be applied;

FIG. 4 is a structural diagram of a terminal provided by an embodiment of the present disclosure;

5 is a structural diagram of a network side device provided by an embodiment of the present disclosure;

6 is a structural diagram of another network side device provided by an embodiment of the present disclosure;

FIG. 7 is a structural diagram of another terminal provided by an embodiment of the present disclosure.

Detailed ways

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

In related wireless communication technologies, handover refers to the handover between different base stations during the movement of the terminal (for example, when the terminal moves from the serving cell of base station A to the serving cell of base station B, the terminal will communicate with base station A's The connection is switched to the connection with the base station B). During the switching process, the network side is assisted to complete the switching based on some measurement results reported by the terminal.

However, in practical applications, there is another switching scenario, which is described below.

With the continuous development of mobile communication technology, there are currently various types of terminals. For example, a user has a vehicle-mounted terminal and a common mobile terminal at the same time, or a user has a single-screen terminal and a multi-screen terminal at the same time, and so on. At this time, there is another switching requirement, that is, according to different scenarios, it is necessary to migrate the services that are being performed on one terminal to another terminal. For example, a user may have a mobile phone and a watch phone with communication functions. In the process of making a call on the mobile phone, if you want to go out for a run but do not want to take the mobile phone with you, then you want to switch the current call business to the watch phone for execution. For another example, a user may have a mobile phone and a vehicle-mounted terminal. After the user gets into the vehicle, he wishes to switch the call service to the vehicle-mounted terminal for execution. For another example, the user wishes to switch the current media browsing service to a terminal with a larger screen area for execution, and even if the current terminal has insufficient power, he wishes to switch the current service to another terminal for execution. It is also possible that the user wants to improve the reliability and transmission rate of transmission, and hopes to offload the service transmitted by the current terminal to another terminal, so that the other terminal can send and receive part or all of the service data, that is, the service is realized through two different terminals. joint transmission or joint reception to improve the reliability or transmission rate of service transmission.

According to the above description, it can be found that the handover in the specific embodiment of the present disclosure refers to the handover of the currently established or executing service to another terminal, which is different from the service of call transfer in the related art, and is also different from the mobile phone. Handover between different base stations/cells.

In these scenarios where switching between two terminals is required, the solution in the related art can be implemented in the following manner: the first terminal transparently transmits service data packets to the second terminal through Bluetooth or other short-range communication protocols.

However, this method is subject to many limitations, such as remaining power (the first terminal must be continuously online as a transit point), terminal capability (both must support the same short-distance communication protocol), and the distance between terminals (the distance is too large to establish a connection), etc. , resulting in less flexibility.

In the handover method provided in the embodiment of the present application, the first terminal sends a connection processing request to the network side to trigger the network side to execute the handover process, or the first terminal sends a request to the network to establish a second connection with the second terminal. request, but does not require maintaining the first connection between the network and the first terminal at the same time, that is to say, the application scheme does not need to call the second terminal like the existing first terminal (the first terminal will also send a call request to the network) to Like the process of making a voice or video call, the connection between the first terminal and the network must be maintained at the same time to ensure the voice or video interaction between the first terminal and the second terminal, so as to solve the problem of poor flexibility in the switching method in the related art. question.

Referring to FIG. 1, FIG. 1 is a flowchart of a first handover method provided by an embodiment of the present disclosure, which is used for a terminal. As shown in FIG. 1, the handover method may include the following steps:

Step 101: Send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the relationship between the network side and the second terminal. The existing connection is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or the second connection is used to carry the first terminal connection part or all of the business in the state. In specific implementation, the above-mentioned services in the first terminal connection state can also be referred to as application data, service data flow (Service Data Flow), user plane data (User Data Plane Traffic), etc. The first connection between them is carried.

In a specific embodiment of the present disclosure, the network side is requested to establish a second connection with the second terminal, or the network side is requested to modify/reconfigure the existing connection between the network side and the second terminal as the second connection, so as to convert the first connection to the second terminal. Part or all of the services in the terminal connection state are switched to or copied to or offloaded to the second connection, or part or all of the services in the first terminal connection state are carried by the second connection, including the same Requirement, that is: the data originally transmitted between the network side and the first terminal is transmitted between the network side and the second terminal by a second connection other than the first connection, and the difference between switching, duplication, offloading and bearer Whether the service data needs to be transmitted between the network side and the first terminal when the service data is transmitted through the second connection; whether the service data needs to be transmitted between the network side and the first terminal when the service data is transmitted through the second connection , and between the network side and the second terminal, part of the data is respectively transmitted, and joint transmission is realized by offloading.

E.g:

The handover can be understood as, after the handover is completed, the handover service data does not need to be transmitted between the network side and the first terminal, that is, the corresponding first connection can be released after the handover is completed.

Replication can be understood as that business data needs to be transmitted through the first connection and the second connection at the same time.

Diversion can be understood that the service data needs to be transmitted through the first connection and the second connection at the same time, but each connection only transmits a part of the service data. And in the case of offloading, the second terminal is not limited to having only one physical second terminal relative to the first terminal.

For example, some PDCP data packets on the same bearer bearer are distributed to other bearer bearers.

However, in some application scenarios, the understanding of handover should not be limited to the overall migration of services, but also handover (handover), switch (exchange), split (diversion), or duplicate (duplication).

The request for the second connection to carry part or all of the services in the connection state of the first terminal can be understood as including any one of the above three methods, namely:

The first terminal switches part or all of the services in the connected state to the second connection; or

The first terminal copies or distributes some or all of the services in the connected state to the second connection; or

In the connected state, the first terminal sends and receives part of the service data through the second connection, so as to realize joint transmission and joint reception of data.

In addition, in the specific embodiment of the present disclosure, part or all of the services in the connection state of the first terminal are switched, copied or offloaded to the second connection, or the second connection is used to carry the services in the connection state of the first terminal. Some or all services, which are different from call forwarding and inter-cell handover in the following aspects:

The business is migration/switching between terminals;

The service to be migrated or copied (that is, part or all of the service in the connection state of the first terminal in this application) is the service currently being executed by the first terminal, such as the voice call service being executed, the video communication service being executed, The ongoing media browsing business, etc.;

The migration or duplication of services is initiated and executed during the execution of services, rather than being automatically executed by the network side that is pre-configured.

In the specific embodiment of the present disclosure, the above-mentioned connection processing request may be realized through any one of indication information, request information and notification information, as long as the network side can know the requirements of the first terminal, which is not specifically limited here. .

In the handover method of the specific embodiment of the present disclosure, part or all of the services of the first terminal are performed by the second terminal, and as an optional implementation manner, the second terminal is a preset terminal, or the The terminal indicated by the terminal identification information carried in the connection processing request.

Wherein, in the embodiment in which the second terminal is a preset terminal, the above-mentioned preset may be a preset association relationship between the first terminal and the second terminal, for example: the device information of the first terminal and the second terminal The device information is uniquely associated, or the first terminal and the second terminal are associated with the same user information.

In the above preset method, the second terminal may need to be unique in some applications, and in order to further improve the flexibility of handover, in the specific embodiment of the present disclosure, the terminal identification information is carried in the connection processing request to indicate second terminal. In this manner, the above-mentioned second terminal may also be any terminal other than the first terminal, or one of multiple terminals associated with the first terminal when the second terminal is the second terminal. In this case, it is only necessary to carry the terminal identification information of the second terminal in the connection processing request. In this way, when the network side device receives the above connection processing request, it will determine the second terminal based on the terminal identification information carried in the connection processing request. and switch or copy or offload the connection state service flow executed on the first terminal to the second connection between the network side and the second terminal.

In an optional implementation manner, the second connection includes a radio resource control (Radio Resource Control, RRC) connection, bearer and/or session.

In applications, the second terminal may be in an idle state or inactive state, or the bearer or session between the second terminal and the network side may not support part or all of the services in the connection state of the first terminal, etc. , resulting in the situation that the service on the first connection cannot be switched to the second connection. In implementation, when receiving the above connection processing request, the network side device will perform a process of creating or modifying an RRC connection and bearer/session based on the connection processing request and the network status of the second terminal.

In practical applications, the network state of the second terminal may be any of the following:

Case 1: the second terminal is in an idle state or an inactive state;

Case 2: The second terminal is in a connected state, but the bearer between the second terminal and the network side does not support part or all of the services in the connected state of the first terminal;

Case 3: The second terminal is in a connected state, but the session between the second terminal and the network side does not support part or all of the services in the connected state of the first terminal;

Case 4: The second terminal is in a connected state, and the established bearer and session meet the service requirements of the service.

In the first case, the following methods can be used to switch, copy or offload some or all of the services in the connected state on the first terminal to the second connection, or request the second connection to carry the services in the connected state of the first terminal. Part or all of the business:

An RRC connection, bearer and session are newly established between the second terminal and the network side, and the service is processed by using the newly established RRC connection, bearer and session.

In this embodiment, an RRC connection can be established between the second terminal and the network side, and a bearer and a session that meet the service requirements of the service can be established, so as to ensure that the service can be switched, copied or offloaded to the second connection or the service is carried on the second connection.

In the second case, the following two ways can be used to switch, copy or offload part or all of the services in the connected state on the first terminal to the second connection, or request the second connection to carry the connected state of the first terminal Some or all of the following businesses:

Manner 1: Create a new bearer and session that meets the service requirement of the service, and utilize the RRC connection established between the second terminal and the network side, the bearer that meets the service requirement, and the session processing that meets the service requirement the business.

Mode 2: Modify the bearer and session that do not meet the service requirement of the service, and use the RRC connection established between the second terminal and the network side, the bearer that meets the service requirement, and the session that meets the service requirement process the business.

In the third case, the following two ways can be used to switch, copy or offload part or all of the services in the connected state on the first terminal to the second connection, or request the second connection to carry the connected state of the first terminal Some or all of the following businesses:

Manner 1: Create a new session that meets the service requirement of the service, and use the RRC connection established between the second terminal and the network side, the bearer that meets the service requirement, and the session that meets the service requirement to process the session. business.

Wherein, in the case that the current session cannot meet the service requirement of the service, the above-mentioned newly created session that meets the service requirement of the service may be: creating a new PDU session that meets the service requirement of the service, and will be the service requirement of the service. The Protocol Data Unit (PDU) session identifier (PDU-Session ID) associated with the newly established PDU session.

In the case that the current session or the QoS Flow in the session cannot meet the service requirements of the service, the above-mentioned newly created session that meets the service requirements of the service may also be: creating a new QoS Flow that meets the service requirements of the service, and Associate the service with the newly created QoS Flow ID (QoS Flow ID, QFI).

Mode 2: Modify the session that does not meet the service requirement of the service, and use the RRC connection established between the second terminal and the network side, the bearer that meets the service requirement, and the session that meets the service requirement. described business.

In the fourth case, the established bearer and session between the second terminal and the network side can be directly used to process the service.

As an optional implementation manner, after sending the connection processing request to the network side device, the method further includes:

Send the uplink data to the network side until receiving the indication information indicating that the second terminal has successfully completed the connection configuration with the network side; or

receiving a release indication message sent by the network side device;

Release the first connection, where the first connection is a connection established between the first terminal and the network side.

In an implementation manner, when the second connection between the second terminal and the network side is established, modified or reconfigured, the second terminal will send to the first terminal a message indicating the successful completion of the connection configuration with the network side. indication information, the first terminal stops the data interaction related to the service to be switched on the first connection in response to the indication information.

As an optional implementation manner, after the sending the connection processing request to the network-side device, the method further includes:

Send the uplink data to the network side, until after receiving the instruction information indicating that the second terminal has successfully completed the connection configuration with the network side, pass all or part of the uplink data through the second terminal, and use the second terminal to communicate with the network side. The second connection on the network side sends; or receives the data received by the second terminal and sent to the second terminal by the base station side using the second connection between the second terminal and the network side. Downlink data.

In practical applications, if the second connection between the second terminal and the network side has not been established or the modification/reconfiguration has not been completed, the second terminal cannot carry the part or part of the connection state of the first terminal based on the second connection. All business. In this embodiment, after the first terminal sends a connection processing request to the network-side device, and before the second terminal successfully completes the connection configuration with the network, in this process, the first terminal can still perform data exchange with the network-side settings, Before the service in the connection state of the first terminal is successfully switched to the second connection, the first terminal can continue to support the service.

Of course, when the first terminal receives the indication information that the second terminal has successfully completed the connection configuration with the network, it means that the service in the connection state of the first terminal has been successfully switched to the second connection, so that the first terminal can be stopped. Data interaction with network-side devices saves resources and avoids duplication and confusion of business data.

In another implementation manner, the network-side device may switch, copy or offload part or all of the services in the connection state of the first terminal to the second connection after receiving the message sent by the second terminal successfully, or, the first After the second connection is completed to carry part or all of the services in the connected state of the first terminal, the above-mentioned release indication message is sent to the first terminal.

In this embodiment, the first terminal will release the first connection in response to the release instruction message, so as to release the idle first connection after a successful handover, so as to reduce waste of resources.

In a specific implementation, in the above handover process, the first terminal and the second terminal can be made to execute the above service in parallel until the first connection is released.

Wherein, during the parallel process between the first terminal and the second terminal, the first terminal and the second terminal can respectively receive downlink data packets from the network side, and the first terminal and the second terminal can respectively send uplink data packets to the network side , in order to avoid packet loss in this process, the following methods can be used:

Mode 1: Before the first connection is released, the allocation of the sequence number (Sequence Number, SN) of the service data unit (Service Data Unit, SDU) in the downlink packet data convergence protocol (Packet Data Convergence Protocol, PDCP) corresponding to the service The network side device (usually a base station, but it is not excluded that with the evolution of the network, it is handled by other devices) is responsible for the network side device corresponding to the first connection, until after the handover is completed, the distribution of the SN of the downlink PDCP SDU corresponding to the service is determined by the The network side device (usually a base station, but it is not excluded that with the evolution of the network, it is handled by other devices) corresponding to the second connection is responsible.

Mode 2: During the parallel process between the first terminal and the second terminal, in order to avoid data packet loss, the application layer can also ensure the consistency of the sequence numbers sent by the two terminals.

In the embodiment shown in Figure 3a, in the downlink, the PDCP protocol layer of the first network-side device (hereinafter referred to as the "first base station") connected to the first terminal is responsible for allocating SNs of downlink PDCP SDUs until When the first base station connected to the first terminal receives the handover success message and sends the SN status forwarding message to the second network side device (hereinafter referred to as the "second base station") connected to the second terminal, the first base station stops allocating downlink PDCP The SN number of the SDN, and the assignment of the SN is handed over to the second base station for execution.

It should be noted that, in specific implementation, the above-mentioned first base station and second base station may be the same base station, and of course, they may also be different base stations, which are not specifically limited here.

In this embodiment, by synchronizing the SN information of the PDCP SDUs of the first terminal and the second terminal, data packet loss can be avoided in the process of checking the sequence numbers of the data packets based on the SN information.

In this embodiment of the present disclosure, the first terminal sends a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side with the second terminal. The existing connection of the second terminal is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or to be carried by the second connection Part or all of the services in the connection state of the first terminal. In this embodiment, the first terminal sends a connection processing request to the network side device, so that part or all of the services in the connection state of the first terminal are switched, copied or distributed to the second terminal and the network side through the network side. On the second connection between the two terminals, that is, by performing wireless network handover on the network side, the service that is continuously executed on the first terminal is switched to the second terminal for execution, and there is no need to base on the connection between the first terminal and the second terminal. The data transparent transmission function improves the flexibility of the switching method provided by the embodiment of the present application.

Please refer to FIG. 2 , which is a flowchart of a second switching method provided by an embodiment of the present disclosure. The switching method is used for network-side devices. As shown in FIG. 2 , the switching method may include the following steps:

Step 201: Receive a connection processing request sent by a first terminal.

The above connection processing request has the same meaning as the connection processing request in the method embodiment shown in FIG. 1 , and details are not repeated here.

Step 202: Switch, copy or offload some or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry part of the first terminal connection state Or all services, the first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.

The above-mentioned switching, copying or offloading part or all of the services carried by the first connection in the first terminal connection state to the second connection, or using the second connection to carry part of the first terminal connection state The specific process of or all services is the same as switching, copying or offloading some or all services in the first terminal connection state to the second connection in the method embodiment shown in FIG. 1 , or using the second connection. The process of connecting to bear part or all of the services in the connection state of the first terminal corresponds to, and will not be repeated here.

Optionally, the second terminal is a preset terminal, or a terminal indicated by terminal identification information carried in the connection processing request.

Optionally, the second connection includes an RRC connection, a bearer or a session.

Optionally, the step of switching part or all of the services on the first connection to the second connection, or using the second connection to carry part or all of the services in the connection state of the first terminal, includes:

When the second terminal is in an idle state or an inactive state, an RRC connection, bearer or session is newly established between the second terminal and the network side, and the service is processed by using the newly established RRC connection, bearer or session ;

or

In the case that the second terminal is in the connected state and the established bearer or session meets the service requirements of the service, the RRC connection, bearer or session established between the second terminal and the network side is used to process the business;

or

When the second terminal is in the connected state and the established bearer and/or session does not meet the service requirement of the service, create a new bearer and/or session that meets the service requirement of the service, and use the The established RRC connection between the second terminal and the network side, the bearer that meets the service requirement, and the session that meets the service requirement process the service;

or

In the case that the second terminal is in the connected state and the established bearer and/or session does not meet the service requirement of the service, modify the bearer and/or session that does not meet the service requirement of the service, and utilize the established bearer and/or session. The service is processed according to the RRC connection established between the second terminal and the network side, the bearer that meets the service requirement, and the session that meets the service requirement.

In this embodiment and the method embodiment shown in FIG. 1, when the network side device receives the above connection processing request, it will create or modify the RRC connection, bearer/session based on the connection processing request and the network status of the second terminal. The implementation of the process has the same meaning and will not be repeated here.

Optionally, all service data of the part or all of the services are configured to have the same or equivalent QFI.

In a specific implementation, the QoS flow is the most refined QoS differentiation granularity in the PDU session, that is to say, the difference between the two PDU sessions is that their QoS flows are different. In a wireless communication system (such as a 5G system), a QoS flow ID (QFI) is used to identify a QoS flow, so that the user plane data with the same QFI in the PDU session will obtain the same forwarding processing (such as the same scheduling, the same access thresholds, etc.).

In practical applications, the QFI must be unique within a PDU session, that is to say, a PDU session can have multiple (up to 64) QoS flows, but the QFI of each QoS flow is different (the value ranges from 0 to 63). ). However, for two PDU sessions of the same terminal, the QFIs in the two PDU sessions may be duplicated.

In this embodiment, all service data of some or all of the services (that is, the service data of the service to be switched) are configured to have the same or equivalent QFI, so that the network side can analyze the service data of these services that need to be switched. Do the same, eg: both forward to the second connection. In this way, it is convenient for the network side to identify the service data of the services to be switched based on the same QFI, and perform the same processing on the service data of these services.

Optionally, after the switching of part or all of the services carried by the first connection in the connection state of the first terminal to the second connection, the method further includes:

The first connection is released, and the service data of the service is transmitted through the second connection.

In this embodiment, after the service on the first connection is switched to the second connection, the first connection in the idle state is released, thereby saving network resources.

Optionally, the network side device is an access network device or a core network device.

In an optional implementation manner, the above-mentioned network-side device is a core network device, and the core network device may be a data network (Data Network, DN) in the core network, and the first connection includes a connection between the core network and the first terminal. The second connection includes the transmission channel between the core network and the second terminal, and the part of the first connection between the core network equipment and the access network settings and the second connection between the core network equipment and the access network are connected. The parts of the access network settings are independent of each other, and can simultaneously transmit service data of at least one service within a period of time.

In this embodiment, the core network device completes the copying or rerouting of part or all of the service data on the first connection to the second connection.

For example, in the embodiment shown in FIG. 3a, a radio access network (Radio Access Network, RAN) device includes a first base station and a second base station, and the first terminal UE A is connected to a user plane functional entity (User A) through the first base station. Plane Function, UPF), the second terminal UE B is connected to the UPF through the second base station, and the UPF is connected to the DN to obtain the QoS Flow of UE A (ie, the QoS Flow for UE A as shown in Figure 3a) is mapped The network protocol flow A of the relationship (i.e. IP Flow A as shown in Figure 3a) and the IP Flow B which is in a mapping relationship with UE B's QoS Flow for UE B. In this embodiment, the above switching method may include the following processes:

In the downlink, the first base station is first responsible for the allocation of SNs of downlink PDCP SDUs, until the first base station receives the handover success message and sends the SN status forwarding message to the second base station, at which time the first base station stops allocating downlinks. The SN number of the PDCP SDU, and the assignment of the SN is handed over to the second base station for execution.

In addition, during the handover process, the first base station schedules downlink data on the link connected to UE A on the one hand, so that UE A receives downlink data packets from the first base station, and at the same time starts to forward the downlink PDCP carrying the assigned PDCP SN The SDU is given to the second base station, so that UE B receives the downlink data packet from the second base station, so as to realize the parallel connection of the first connection and the second connection.

During the parallel process of the first connection and the second connection, the first base station may be responsible for maintaining the forwarded downlink PDCP SDU Hyper Frame Number (Hyper Frame Number, HFN) to improve the performance of secure synchronization. Specifically, the first base station sends Forward the message in advance state, and carry the downstream count value in the message, and include the PDCP SN and HFN of the first forwarded PDCP SDU.

Similarly, after the first base station stops allocating the SN number of the downlink PDCP SDN, and the assignment of the SN is switched to the second base station, the maintenance work of the HFN of the downlink PDCP SDU is also switched to the second base station for execution.

During the handover execution process, the first base station and the second base station may further perform robust header compression (Robust Header Compression, ROHC) respectively to encrypt and enhance the PDCP header.

In the uplink, UE A sends the uplink data to the first base station until UE A receives the indication information that UE B has successfully completed the random access procedure to the second base station. And, even after switching the transmission of UE A sending the uplink data to the first base station, UE A can continue to send the channel state information (Channel State Information, CSI) of the uplink layer 1 (L1) to the first base station feedback, Hybrid automatic repeat request (HARQ) feedback, Layer 2 (L2) Radio Link Control (RLC) feedback, ROHC feedback, HARQ and RLC data retransmission to achieve the first A connection is parallel to the second connection.

In addition, during the handover process, the SN information of the PDCP SDU is exchanged between UE A and UE B through a direct link to ensure SN synchronization; or, the application layer ensures the consistency of the sequence numbers sent by the two UEs.

Further, during handover execution, UE A and UE B may also maintain separate security contexts and ROHC header compressor contexts, respectively, for uplink transmissions to the first base station and the second base station.

In addition, the HFN and PDCP SN can be retained in the second base station, and the second base station is instructed to start transmitting the first Lost UL count value (Count), this process can also be applied to the unacknowledged mode (RLC Unacknowledged Mode, RLC-UM) in radio link control.

After the network side device receives the connection processing request, UE A suspends the signaling radio bearer (SRB) to the first base station, and stops sending and receiving any RRC control plane signaling towards the serving cell connected to UE A ; UE B and the first base station establish an SRB.

After the handover is successfully performed, the first base station may receive a release indication message from the second base station to instruct UE A to release the connection (i.e. the first connection) with the first base station.

It should be noted that, the first base station and the second base station in FIG. 3a may be the same base station or different base stations, which are not specifically limited herein.

In another optional implementation manner, the network-side device is an access network device, the first connection includes a transmission channel between the access network device and the first terminal, and the second connection includes the access network device and the second terminal. Transmission channel between terminals.

In addition, in this embodiment, the transmission channel between the core network and the first terminal located between the core network device and the access network device and the transmission channel between the core network and the second terminal located between the core network device and the access network device for the same transmission channel.

In this embodiment, the access network device sends the data in the transmission channel to the second terminal.

For example, in the embodiment shown in FIG. 3b, the access network device includes a target base station, and both the first terminal UE A and the second terminal UE B are connected to the UPF through the target base station, and the UPF is connected to the DN. In this embodiment, the execution process of the above handover method is the same as the execution process of the handover method in the embodiment shown in FIG. 3a, the difference is: in this embodiment, the first base station and the second base station are the same base station (that is, the target base station), which will not be repeated here.

In the handover method provided by the embodiments of the present disclosure, the terminal triggers the network side device to perform the handover, so that there is no need to establish a data exchange connection between the first terminal before the handover and the second terminal after the handover through the short-range communication protocol, thereby improving the handover. The flexibility of the method has the same beneficial effects as the method embodiment shown in FIG. 1 , and to avoid repetition, details are not described here.

Please refer to FIG. 4 , which is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in FIG. 4 , the terminal 400 includes:

The first sending module 401 is configured to send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side and the second terminal. The existing connection of the second terminal is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or the second connection is used to carry all the services. Part or all of the services in the connection state of the first terminal.

Further, the second terminal is a preset terminal, or a terminal indicated by the terminal identification information carried in the connection processing request.

Further, the second connection includes a radio resource control RRC connection, bearer and/or session.

Further, the terminal 400 further includes:

A second sending module, configured to send the uplink data to the network side until the indication information indicating that the second terminal has successfully completed the connection configuration with the network side is received; or

a second receiving module, configured to receive a release instruction message sent by the network side device;

A release module, configured to release a first connection, wherein the first connection is a connection established between the first terminal and the network side.

Further, before the first connection is released, the allocation of the SN of the downlink PDCP SDU corresponding to the service is responsible for the network side device corresponding to the first connection, until the handover is completed, the allocation of the SN of the downlink PDCP SDU corresponding to the service is allocated. The network side device corresponding to the second connection is responsible.

The terminal in this embodiment of the present disclosure can send a connection processing request to the network-side device through the first terminal, so as to trigger the network-side device to switch, copy or offload some or all of the services in the connection state of the first terminal to the second terminal connection, or use the second connection to carry part or all of the services in the connection state of the first terminal without establishing a data exchange connection of the short-range communication protocol with the second terminal, thereby improving the relationship between the first terminal and the second terminal. Flexibility of switching between second terminals.

Please refer to FIG. 5 , which is a schematic structural diagram of a network side device provided by an embodiment of the present disclosure. As shown in FIG. 5 , the network side device 500 includes:

A first receiving module 501, configured to receive a connection processing request sent by a first terminal;

A switching module 502, configured to switch or copy or offload the services on the first connection to the second connection, or request the second connection to carry part or all of the services in the connection state of the first terminal, the first connection In order to establish the connection between the first terminal and the network side, the second connection is the connection established between the second terminal and the network side.

Further, the second connection includes an RRC connection, a bearer or a session.

Further, the switching module 502 is specifically used for:

or

Further, the service data of the service is configured to have the same or equivalent QFI.

Further, the network side device 500 further includes:

A release module, configured to release the first connection, and transmit the service data of the service through the second connection.

Further, the network side device is an access network device or a core network device.

The network-side device in the embodiment of the present disclosure can switch, copy or offload services on the first connection to the second connection based on the connection processing request sent by the terminal, or request the second connection to carry the service in the connection state of the first terminal. Part or all of the services, thereby completing the handover between the first terminal and the second terminal, have the same beneficial effects as the method embodiment shown in FIG.

Referring to FIG. 6 , an embodiment of the present disclosure further provides a network-side device, including a bus 601 , a transceiver 602 , an antenna 603 , a bus interface 604 , a processor 605 , and a memory 606 .

A transceiver 602, configured to receive a connection processing request sent by the first terminal;

The processor 605 is configured to switch, copy or offload part or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry the first terminal connection state Part or all of the services under the network, the first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.

Further, the switching of part or all of the services on the first connection to the second connection performed by the processor 605, or the use of the second connection to carry part or all of the services in the connection state of the first terminal, includes:

or

Further, the service data of the service is configured to have the same or equivalent quality of service flow identifier QFI.

Further, after executing the switching of part or all of the services carried by the first connection in the first terminal connection state to the second connection, the processor 605 is further configured to:

In this implementation manner, the entity can implement each process implemented by the network-side device in the method embodiment shown in FIG. 2 , which is not repeated here to avoid repetition.

In Figure 6, a bus architecture (represented by bus 601), which may include any number of interconnected buses and bridges, bus 601 will include one or more processors represented by processor 605 and memory represented by memory 606 The various circuits are linked together. The bus 601 may also link together various other circuits such as peripherals, voltage regulators and power management circuits, etc., which are well known in the art and therefore will not be described further herein. Bus interface 604 provides an interface between bus 601 and transceiver 602 . Transceiver 602 may be a single element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other devices over a transmission medium. The data processed by the processor 605 is transmitted on the wireless medium through the antenna 603 , and further, the antenna 603 also receives the data and transmits the data to the processor 605 .

Processor 605 is responsible for managing bus 601 and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management, and other control functions. In turn, memory 606 may be used to store data used by processor 605 in performing operations.

Optionally, the processor 605 may be a CPU, ASIC, FPGA or CPLD.

Referring to FIG. 7 , an embodiment of the present disclosure further provides a terminal 700, including a bus 701, a transceiver 702, an antenna 703, a bus interface 704, a processor 705, and a memory 706.

The transceiver 702 is configured to send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side and the second terminal. The existing connection of the two terminals is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or the second connection is used to carry the second connection. Part or all of the services in the connected state of a terminal.

Further, after the transceiver 702 executes the sending connection processing request to the network side device:

The transceiver 702 is further configured to send the uplink data to the network side until the indication information indicating that the second terminal has successfully completed the connection configuration with the network side is received; or

The transceiver 702 is further configured to receive a release instruction message sent by the network side device;

The processor 705 is configured to release a first connection, where the first connection is a connection established between the first terminal and the network side.

Further, before the first connection is released, the allocation of the SN of the downlink PDCP SDU corresponding to the service is responsible for the network side device corresponding to the first connection, until after the handover is completed, the allocation of the SN of the downlink PDCP SDU corresponding to the service is allocated. The network side device corresponding to the second connection is responsible.

In this implementation manner, the entity can implement each process implemented by the first terminal in the method embodiment shown in FIG. 1 , which is not repeated here to avoid repetition.

The entity in this embodiment can trigger the network side device to switch part or all of the services in the connection state of the first terminal to the second connection between the second terminal and the network side by sending a connection processing request to the network side device, There is no need to establish a data exchange connection of the short-range communication protocol with the second terminal, thereby improving the flexibility of switching between the entity and the second terminal.

Optionally, an embodiment of the present disclosure further provides a terminal, including a processor 705 , a memory 706 , a computer program stored in the memory 706 and executable on the processor 705 , when the computer program is executed by the processor 705 Each process of the above-mentioned handover method embodiment shown in FIG. 1 is implemented, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

Embodiments of the present disclosure further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, each process of the switching method embodiment shown in FIG. 1 or FIG. 2 is implemented. , and can achieve the same technical effect, in order to avoid repetition, it is not repeated here.

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

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

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

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

Claims

A switching method for a first terminal, comprising:

Send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the existing connection between the network side and the second terminal It is the second connection, so as to switch, copy or offload some or all of the services in the first terminal connection state to the second connection, or use the second connection to carry the first terminal connection state. some or all of the business.
The handover method according to claim 1, wherein the second terminal is a preset terminal, or a terminal indicated by terminal identification information carried in the connection processing request.
The handover method according to claim 1, wherein the second connection comprises a radio resource control RRC connection, bearer and/or session.
The handover method according to claim 1, wherein after the sending the connection processing request to the network side device, the method further comprises:

sending the uplink data to the network side until receiving the indication information indicating that the second terminal has successfully completed the connection configuration with the network side; or

receiving a release indication message sent by the network side device;

Release the first connection, where the first connection is a connection established between the first terminal and the network side.
The handover method according to claim 1, wherein after the sending the connection processing request to the network side device, the method further comprises:

Send the uplink data to the network side, until after receiving the instruction information indicating that the second terminal has successfully completed the connection configuration with the network side, pass all or part of the uplink data through the second terminal, and use the second terminal to communicate with the network side. The second connection on the network side sends; or receives the data received by the second terminal and sent to the second terminal by the base station side using the second connection between the second terminal and the network side. Downlink data.
The handover method according to any one of claims 1-5, wherein,

Before the first connection is released, the allocation of the sequence number SN of the service data unit SDU in the downlink packet data convergence protocol PDCP corresponding to the service is the responsibility of the network side device corresponding to the first connection, until after the handover is completed, the service The allocation of the SN of the corresponding downlink PDCP SDU is the responsibility of the network side device corresponding to the second connection.
A switching method for network side equipment, including:

receiving a connection processing request sent by the first terminal;

Switch or copy or offload part or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry part or all of the services in the first terminal connection state , the first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.
The handover method according to claim 7, wherein the second terminal is a preset terminal, or a terminal indicated by terminal identification information carried in the connection processing request.
The handover method according to claim 7, wherein the second connection comprises a radio resource control RRC connection, bearer and/or session.
The handover method according to claim 7 or 9, wherein, in the connection state of the first terminal, part or all of the services carried by the first connection are switched to or copied to or offloaded to the second connection, or the first terminal is The second connection carries part or all of the services in the connected state of the first terminal, including:

When the second terminal is in an idle state or an inactive state, an RRC connection, bearer and session are newly established between the second terminal and the network side, and the service is processed by using the newly established RRC connection, bearer and session ;

or

When the second terminal is in a connected state and the established bearer and session meet the service requirements of the service, the RRC connection, bearer and session established between the second terminal and the network side are used to process the business;

or

When the second terminal is in a connected state and the established bearer and/or session does not meet the service requirement of the service, create a new bearer and/or session that meets the service requirement of the service, and use the The RRC connection established between the second terminal and the network side, the bearer that meets the service requirement, and the session that meets the service requirement process the service;

or

In the case that the second terminal is in the connected state and the established bearer and/or session does not meet the service requirement of the service, modify the bearer and/or session that does not meet the service requirement of the service, and utilize the established bearer and/or session. The service is processed according to the RRC connection established between the second terminal and the network side, the bearer that meets the service requirement, and the session that meets the service requirement.
The handover method according to claim 10, wherein all service data of the part or all of the services are configured to have the same or equivalent quality of service flow identification QFI.
The handover method according to claim 7, wherein, after the switching of part or all of the services carried by the first connection in the connection state of the first terminal to the second connection, the method further comprises:

The first connection is released, and the service data of the service is transmitted through the second connection.
The handover method according to claim 7, wherein the network side device is an access network device or a core network device.
A terminal, comprising: a processor and a transceiver;

The transceiver is used to send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side and the second terminal. The existing connection of the second terminal is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or the second connection is used to carry the second connection. Part or all of the services in the connection state of the first terminal.
A network side device, comprising: a processor and a transceiver;

the transceiver, configured to receive a connection processing request sent by the first terminal;

The processor is configured to switch, copy or offload part or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry the first terminal connection Part or all of the services in the state, the first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.
A terminal that includes:

The first sending module is configured to send a connection processing request to the network side device, where the connection processing request is used to request the network side to establish a second connection with the second terminal, or to request the network side to modify/reconfigure the network side with the second terminal. The existing connection of the second terminal is the second connection, so that part or all of the services in the connection state of the first terminal are switched to or copied to or offloaded to the second connection, or the second connection is used to carry the second connection. Part or all of the services in the connection state of the first terminal.
A network side device, comprising:

a first receiving module, configured to receive a connection processing request sent by the first terminal;

The switching module is used to switch, copy or offload part or all of the services carried by the first connection in the first terminal connection state to the second connection, or use the second connection to carry the first terminal connection state The first connection is the connection established between the first terminal and the network side, and the second connection is the connection established between the second terminal and the network side.
A terminal, comprising a processor, a memory and a computer program stored on the memory and running on the processor, the computer program being executed by the processor to achieve any one of claims 1 to 6 Steps in the handover method described in item.
A network-side device, comprising a processor, a memory, and a computer program stored on the memory and running on the processor, the computer program being executed by the processor to achieve as in claims 7 to 13 Steps in any one of the switching methods.
A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the switching method according to any one of claims 1 to 6 is implemented. or, when the computer program is executed by the processor, the steps in the switching method according to any one of claims 7 to 13 are implemented.