WO2024007923A1 - Communication method, apparatus, and system - Google Patents

Abstract

A communication method, apparatus, and system. The method comprises: a first terminal device implements M media data transmission services between the first terminal device and a second terminal device, and sends handover indication information to a third terminal device by means of a near-field communication connection, so as to instruct the third terminal device to implement P media data transmission services between the third terminal device and the second terminal device, wherein the P media data transmission services is used for replacing N media data transmission services among the M media data transmission services, each media data transmission service is used for transmitting and/or presenting media data associated with a call service between a user of the first terminal device and a user of the second terminal device. In this way, the first terminal device can transition the call service to the third terminal device. Since there is no need to prebind the first terminal device and the third terminal device, for a user, "one-key transition" or "touch transition" can be implemented, thereby effectively improving the user experience.

Description

A communication method, device and system

Cross-references to related applications

This application claims priority to the Chinese patent application filed with the China Patent Office on July 4, 2022, with application number 202210788490.0 and application title "A communication method, device and system", the entire content of which is incorporated into this application by reference. middle.

Technical field

The present application relates to the field of communication technology, and in particular, to a communication method, device and system.

Background technique

With the continuous development and popularization of terminal devices, users may have multiple terminal devices, such as smart phones that are easy to carry, smart TVs with super large screens, smart watches that are compact and lightweight but with small screens, etc. These devices usually Call services are supported, but the user experience is different. From the perspectives of call continuity and maximizing user experience, users often need to transfer call services between different terminal devices. For example, when a user is making a video call with a friend on a smartphone, if the user returns home from outdoors, he or she may need to transfer the video call from the smartphone to a smart TV so that the user can view the video call through a smartphone with a larger screen and higher definition. TV to continue video calls with friends.

How to realize the transfer of call services between different terminal devices still requires further research.

Contents of the invention

This application provides a communication method, device and system for transferring call services between different terminal devices.

In the first aspect, embodiments of the present application provide a communication method, which can be applied to a first terminal device or a module in the first terminal device. The embodiments of the present application are not limited to the specific execution subject of the method. Taking this method applied to the first terminal device as an example, in this method, the first terminal device performs M media data transmission services between the first terminal device and the second terminal device; the first terminal device passes through a short distance The communication connection sends handover instruction information to the third terminal device, and the handover instruction information instructs the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device, and the P media data transmission services are used to replace N media data transmission services among the M media data transmission services; and, the first terminal device determines that the third terminal device has started to execute the P media data transmission services After that, the execution of the N media data transmission services is suspended or terminated; wherein each media data transmission service is used to transmit and/or present the connection between the user of the first terminal device and the user of the second terminal device. Media data associated with the call service; N is less than or equal to M, and P is greater than or equal to or less than N.

Using the above method, the first terminal device can send handover instruction information to the third terminal device through the short-range communication connection to hand over the N media data transmission services to the third terminal device, thereby enabling the first terminal device to transfer the call service to the third terminal device. field to a third terminal device. In this way, the first terminal device and the third terminal device do not need to be pre-bound. The first terminal device can send handover instruction information to the third terminal device through the near field communication connection. Therefore, for the user, "one-click transition" can be realized ” (For example, if the user triggers the transition button on the first terminal device, the call service of the first terminal device can be transferred to the third terminal device) or “touch transition” (for example, the user can transfer the call service of the first terminal device to the third terminal device) By touching the third terminal device, the call service of the first terminal device can be transferred to the third terminal device), which can effectively improve the user experience; and, since the first terminal device and the third terminal device can directly communicate through the proximity The distance communication connection is used to communicate, the implementation of transition is relatively simple, and the transition delay can be effectively reduced.

In a possible design, the method further includes: sending handover credential information to the third terminal device through the short-range communication connection, where the handover credential information indicates that the control function entity of the call service allows the The third terminal device takes over from the second terminal device to perform the media data transmission service.

In this way, since the first terminal device can send the handover credential information to the third terminal device, the third terminal device itself does not need to request the credential information, so that the third terminal device can be more diverse (for example, the third terminal device does not need to request credential information) ability), the transition plan is more applicable.

In a possible design, the method further includes: sending handover credential request information to the control function entity, where the handover credential request information includes information about the user of the first terminal device and the third terminal device. The device identification, the user information of the first terminal device and the device identification of the third terminal device are used to generate the handover voucher information; receiving the handover voucher information from the control function entity.

In a possible design, the method further includes: receiving a short-range broadcast message from the third terminal device, the short-range broadcast message being The distance broadcast message includes the short distance broadcast identification of the third terminal device; and the device identification of the third terminal device is determined according to the short distance broadcast identification of the third terminal device.

In a possible design, the method further includes: sending the address information of the control function entity to the third terminal device through the short-range communication connection.

In a possible design, the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services.

In this way, the first terminal device can flexibly determine the handover object and indicate the handover object to the third terminal device through the handover object information, so that the third terminal device can clearly know the handover object.

In a possible design, the handover object information includes identifiers of the N media data transmission services.

In a possible design, the method further includes: receiving media capability information from the third terminal device through the short-range communication connection, where the media capability information is used to indicate that the third terminal device supports Media data transmission service: determine the handover object information according to the media capability information.

In this way, since the handover object information is determined based on the media capability information of the third terminal device, it is possible to avoid transition failure due to media capability limitations of the third terminal device and ensure a successful transition.

In a possible design, the handover instruction information includes a user identification of the second terminal device and/or an identification of a session between the first terminal device and the second terminal device associated with the call service.

In a possible design, determining that the third terminal device has started executing the P media data transmission services includes: receiving handover completion information from the third terminal device, where the handover completion information is used to indicate The third terminal device has started executing the P media data transmission services.

In a possible design, the method further includes: sending control information to the third terminal device through the short-range communication connection, where the control information is used to control the P media data transmission services.

That is to say, after the first terminal device transfers the call service to the third terminal device, the first terminal device can also control the P media data transmission services of the third terminal device by sending control information. In this way, when the third terminal device is a device that is inconvenient to operate and the first terminal device is a device that is easy to operate, the user can perform operations on the first terminal device to control the P media data transmission services of the third terminal device to facilitate Improve user experience.

In the second aspect, embodiments of the present application provide a communication method, which can be applied to a third terminal device or a module in the third terminal device. The embodiments of the present application are not limited to the specific execution subject of the method. Taking this method applied to a third terminal device as an example, in this method, the third terminal device receives handover instruction information from the first terminal device through a short-range communication connection, and the handover instruction information instructs the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device, the P media data transmission services are used to replace the P media data transmission services between the first terminal device and the second terminal device. N media data transmission services; and, the third terminal device performs P media data transmission services between the third terminal device and the second terminal device according to the handover instruction information; wherein, each media data The transmission service is used to transmit and/or present media data associated with the call service between the user of the first terminal device and the user of the second terminal device; N is less than or equal to M, and P is greater than or equal to or less than N.

In a possible design, the method further includes: receiving handover voucher information from the first terminal device through the short-range communication connection; sending the handover voucher information to the control function entity. The credential information indicates that the control function entity of the call service allows the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device.

In a possible design, the method further includes: receiving address information from the control function entity of the first terminal device through the short-range communication connection.

In a possible design, the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services.

In a possible design, the handover object information includes identifiers of the N media data transmission services.

In a possible design, the method further includes: sending media capability information to the first terminal device through the short-range communication connection, where the media capability information is used to indicate media supported by the third terminal device. Data transmission service; wherein the media capability information is used to determine the handover object information.

In a possible design, the handover instruction information includes a user identification of the second terminal device and/or an identification of a session between the first terminal device and the second terminal device associated with the call service.

In a possible design, the method further includes: sending handover completion information to the first terminal device through the short-range communication connection, where the handover completion information is used to indicate that the third terminal device has started execution. The P media data transmission services.

In a possible design, the method further includes: receiving control information from the first terminal device through the short-range communication connection, where the control information is used to control the P media data transmission services.

In a third aspect, embodiments of the present application provide a communication method, and the execution subject of the method may include a first terminal device and a third terminal device. In this method, the first terminal device performs M media data transmission services between the first terminal device and the second terminal device; and, sends handover instruction information to the third terminal device through a short distance communication connection, the The handover instruction information instructs the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device, and the P media data transmission services are used to replace the M media N media data transmission services in the data transmission services; the third terminal device receives the handover instruction information from the first terminal device, and executes the communication between the third terminal device and the first terminal device according to the handover instruction information. P media data transmission services between the second terminal devices; after the first terminal device determines that the third terminal device has started to execute the P media data transmission services, it suspends or terminates the execution of the N media data transmission services. Media data transmission services; wherein each media data transmission service is used to transmit and/or present media data associated with the call service between the user of the first terminal device and the user of the second terminal device; N is less than or Equal to M, P is greater than or equal to or less than N.

In a possible design, the method further includes: the first terminal device sending handover voucher information to the third terminal device through the short-range communication connection; and the third terminal device receiving the handover voucher information. After receiving the voucher information, the handover voucher information is sent to the control function entity of the call service, and the handover voucher information indicates that the control function entity allows the third terminal device to take over the second terminal device to perform the media data transmission service. .

In a possible design, the method further includes: the first terminal device sending handover credential request information to the control function entity, where the handover credential request information includes information about the user of the first terminal device and The device identification of the third terminal device, the user information of the first terminal device and the device identification of the third terminal device are used to generate the handover voucher information; the first terminal device obtains the information from the control function The entity receives the handover credential information.

In a possible design, the method further includes: the first terminal device receiving a short-range broadcast message from the third terminal device, where the short-range broadcast message includes a short-range broadcast message of the third terminal device. Broadcast identification; the first terminal device determines the device identification of the third terminal device based on the short-range broadcast identification of the third terminal device.

In a possible design, the method further includes: the first terminal device sending the address information of the control function entity to the third terminal device through the short-range communication connection; the third terminal device According to the address information of the control function entity, the handover voucher information is sent to the control function entity of the call service.

In a possible design, the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services.

In a possible design, the handover object information includes identifiers of the N media data transmission services.

In a possible design, the method further includes: the third terminal device sending media capability information of the third terminal device to the first terminal device through the short-range communication connection. The information is used to indicate the media data transmission service supported by the third terminal device; after receiving the media capability information of the third terminal device, the first terminal device determines the handover object information according to the media capability information. .

In a possible design, the handover instruction information includes a user identification of the second terminal device and/or an identification of a session between the first terminal device and the second terminal device associated with the call service.

In a possible design, the method further includes: the third terminal device sending handover completion information to the first terminal device through the near field communication connection, where the handover completion information is used to indicate that the handover completion information The third terminal device has started to execute the P media data transmission services; the first terminal device determines that the third terminal device has started to execute the P media data transmission services according to the handover completion information.

In a possible design, the method further includes: the first terminal device sending control information to the third terminal device through the short-range communication connection; the third terminal device receiving the control information, The control information is used to control the P media data transmission services.

It can be understood that the methods claimed in the second and third aspects correspond to the methods claimed in the first aspect, and the beneficial effects of the relevant technical features in the second and third aspects can be referred to the description in the first aspect.

In a fourth aspect, embodiments of the present application provide a communication device, which has the function of implementing the method described in the first aspect. For example, the communication device includes modules or units or means (means) that perform the steps involved in the first aspect. The functions, units or means can be implemented by software, or implemented by hardware, or can also be implemented by hardware. Software Implementation.

As a possible implementation, the communication device includes a processing module and a communication module, where the communication module can be used to send and receive signals to implement communication between the communication device and other devices; the processing module can be used to execute the communication device some internal operations.

Specifically, in one embodiment, the processing module is configured to: perform M media data transmission services between the first terminal device and the second terminal device; the communication module is configured to: transmit data to the third terminal through a short distance communication connection. The device sends handover instruction information, and the handover instruction information instructs the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device, and the P media data transmission services used to replace N media data transmission services among the M media data transmission services; and, the processing module is also used to: after determining that the third terminal device has started executing the P media data transmission services, suspend execution Or terminate the execution of the N media data transmission services; wherein each media data transmission service is used to transmit and/or present the call service association between the user of the first terminal device and the user of the second terminal device. media data; N is less than or equal to M, and P is greater than or equal to or less than N.

In a possible design, the communication module is further configured to: send handover credential information to the third terminal device through the short-range communication connection, where the handover credential information indicates that the control function entity of the call service allows the The third terminal device takes over from the second terminal device to perform the media data transmission service.

In a possible design, the communication module is further configured to: send handover credential request information to the control function entity, where the handover credential request information includes information about the user of the first terminal device and the third terminal device. The device identification, the user information of the first terminal device and the device identification of the third terminal device are used to generate the handover voucher information; receiving the handover voucher information from the control function entity.

In a possible design, the communication module is further configured to: receive a short-range broadcast message from the third terminal device, where the short-range broadcast message includes the short-range broadcast identification of the third terminal device; the processing module is further Used to: determine the device identifier of the third terminal device according to the short-range broadcast identifier of the third terminal device.

In a possible design, the communication module is further configured to: send the address information of the control function entity to the third terminal device through the short-range communication connection.

In a possible design, the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services.

In a possible design, the handover object information includes identifiers of the N media data transmission services.

In a possible design, the communication module is further configured to: receive media capability information from the third terminal device through the short-range communication connection, where the media capability information is used to indicate that the third terminal device supports Media data transmission service; the processing module is also used to: determine the handover object information according to the media capability information.

In a possible design, the handover instruction information includes a user identification of the second terminal device and/or an identification of a session between the first terminal device and the second terminal device associated with the call service.

In a possible design, the communication module is further configured to: receive handover completion information from the third terminal device, where the handover completion information is used to indicate that the third terminal device has started executing the P pieces of media data. transmission business.

In a possible design, the communication module is further configured to: send control information to the third terminal device through the short-range communication connection, where the control information is used to control the P media data transmission services.

As a possible implementation, the communication device includes a processor and may also include a transceiver, the transceiver is used to send and receive signals, and the processor executes program instructions to complete any possible design or implementation in the first aspect. method within the method. Wherein, the communication device may further include one or more memories, the memory being used to couple with the processor, and the memory may store necessary computer programs or instructions to implement the functions involved in the first aspect. The processor can execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the communication device implements the method in any possible design or implementation manner in the above-mentioned first aspect.

As a possible implementation, the communication device includes a processor, and the processor may be configured to be coupled to a memory. The memory may store necessary computer programs or instructions to implement the functions involved in the first aspect. The processor can execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the communication device implements the method in any possible design or implementation manner in the above-mentioned first aspect.

As a possible implementation, the communication device includes a processor and an interface circuit, wherein the processor is configured to electrically The method communicates with other devices and performs the method in any possible design or implementation manner in the first aspect.

In a fifth aspect, embodiments of the present application provide a communication device, which has the function of implementing the method described in the second aspect. For example, the communication device includes modules, units or means for executing the steps involved in the second aspect. The functions, units or means may be implemented by software or hardware, or may be implemented by hardware executing corresponding software.

In a possible design, the communication device includes a processing module and a communication module, wherein the communication module can be used to send and receive signals to implement communication between the communication device and other devices; the processing module can be used to perform the communication Some internal operations of the device.

Specifically, in one embodiment, the communication module is configured to: receive handover instruction information from the first terminal device through a short-range communication connection, where the handover instruction information instructs the third terminal device to perform the communication between the third terminal device and the third terminal device. P media data transmission services between the second terminal devices, the P media data transmission services are used to replace the N media data transmission services between the first terminal device and the second terminal device; The processing module is configured to: execute P media data transmission services between the third terminal device and the second terminal device according to the handover instruction information; wherein each media data transmission service is used for transmission and/or Media data associated with the call service between the user of the first terminal device and the user of the second terminal device is presented; N is less than or equal to M, and P is greater than or equal to or less than N.

In a possible design, the communication module is further configured to: receive handover voucher information sent from the first terminal device through the short-range communication connection; send the handover voucher information to the control function entity, and the handover voucher information is sent to the control function entity. The credential information indicates that the control function entity of the call service allows the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device.

In a possible design, the communication module is further configured to: receive address information from the control function entity of the first terminal device through the short-range communication connection.

In a possible design, the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services.

In a possible design, the handover object information includes identifiers of the N media data transmission services.

In a possible design, the communication module is further configured to: send media capability information to the first terminal device through the short-range communication connection, where the media capability information is used to indicate media supported by the third terminal device. Data transmission service; wherein the media capability information is used to determine the handover object information.

In a possible design, the handover instruction information includes a user identification of the second terminal device and/or an identification of a session between the first terminal device and the second terminal device associated with the call service.

In a possible design, the communication module is further configured to: send handover completion information to the first terminal device through the short-range communication connection, where the handover completion information is used to indicate that the third terminal device has started execution. The P media data transmission services.

In a possible design, the communication module is further configured to: receive control information from the first terminal device through the short-range communication connection, where the control information is used to control the P media data transmission services.

As a possible implementation, the communication device includes a processor and may also include a transceiver, the transceiver is used to send and receive signals, and the processor executes program instructions to complete any possible design or implementation in the second aspect. method within the method. Wherein, the communication device may further include one or more memories, the memories being used to couple with the processor, and the memories may store necessary computer programs or instructions to implement the functions involved in the second aspect. The processor can execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the communication device implements the method in any possible design or implementation manner in the second aspect.

As a possible implementation, the communication device includes a processor, and the processor may be configured to be coupled to a memory. The memory may store necessary computer programs or instructions to implement the functions related to the second aspect above. The processor can execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the communication device implements the method in any possible design or implementation manner in the second aspect.

As a possible implementation, the communication device includes a processor and an interface circuit, wherein the processor is configured to communicate with other devices through the interface circuit and execute the method in any possible design or implementation of the second aspect. .

It can be understood that in the above fourth and fifth aspects, the processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, When implemented, the processor may be a general-purpose processor implemented by reading software code stored in memory. In addition, the above processors may be one or more, and the memories may be one or more. The memory can be integrated with the processor, or the memory can be provided separately from the processor. In the specific implementation process , the memory and the processor can be integrated on the same chip, or can be respectively provided on different chips. The embodiment of this application does not limit the type of memory and the arrangement method of the memory and the processor.

In a sixth aspect, embodiments of the present application provide a communication system, which includes the communication device provided in the fourth aspect and the communication device provided in the fifth aspect.

In a seventh aspect, the present application provides a computer-readable storage medium. Computer-readable instructions are stored in the computer storage medium. When the computer reads and executes the computer-readable instructions, the computer is caused to execute the above-mentioned first aspect and Methods in any possible design of the second aspect.

In an eighth aspect, the present application provides a computer program product, which when a computer reads and executes the computer program product, causes the computer to execute the method in any possible design of the first aspect and the second aspect.

In a ninth aspect, the present application provides a chip, which includes a processor coupled to a memory for reading and executing software programs stored in the memory to implement the above first and second aspects. any possible design approach.

These and other aspects of the application will be more clearly understood in the following description of the embodiments.

Description of the drawings

Figure 1 is a schematic diagram of a network architecture applicable to the embodiment of the present application;

Figure 2 is a schematic diagram of the network architecture of the IMS network provided by the embodiment of the present application;

Figure 3 is a schematic diagram of the call interface provided by the embodiment of the present application;

Figure 4 is a schematic diagram of a possible registration process provided by the embodiment of the present application;

Figure 5 is a schematic diagram of a possible session establishment process provided by an embodiment of the present application;

Figure 6 is a schematic diagram of a possible session modification process provided by an embodiment of the present application;

Figure 7 is a schematic flow chart corresponding to the communication method provided in Embodiment 1 of the present application;

Figure 8 is a schematic flow chart corresponding to the communication method provided in Embodiment 2 of the present application;

Figure 9 is a schematic flow chart corresponding to the communication method provided in Embodiment 3 of the present application;

Figure 10 is a schematic flow chart corresponding to S907 and S908 in Embodiment 3 of the present application;

Figure 11 is a schematic flow chart corresponding to S907 and S908 in Embodiment 3 of the present application;

Figure 12 is a schematic interface diagram of the first terminal device provided by the embodiment of the present application;

Figure 13 is a possible exemplary block diagram of the device involved in the embodiment of the present application;

Figure 14 is a schematic diagram of a possible structure of the device involved in the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Refer to Figure 1, which is a schematic diagram of a network architecture applicable to the embodiment of the present application. As shown in Figure 1, the network architecture may include multiple terminal devices and control function entities. The multiple terminal devices include, for example, a first terminal device, a second terminal device, and a third terminal device. The control function entity is used to provide multiple terminal devices. A call service between users of the device (for example, a user of a first terminal device and a user of a second terminal device). The call service may include, for example, an audio call service and a video call service.

Among them, taking the first terminal device as an example, the user of the first terminal device can correspond to the subscriber identification module (subscriber identification module, SIM) card or virtual SIM card installed in the first terminal device. In the embodiment of this application, the user corresponds to The SIM card is taken as an example for explanation. The SIM card can be understood as the key for terminal devices to access the mobile network. For convenience of description, the SIM card and its evolution are collectively referred to as SIM cards in the embodiments of this application. For example, the SIM card can be an identification card for global system for mobile communications (GSM) digital mobile phone users, used to store the user's identification code and key; for another example, the SIM card can also be a global user identification card. Card (universal subscriber identity module, USIM), can also be called an upgrade SIM card.

For the call service between the user of the first terminal device and the user of the second terminal device, signaling corresponding to the call service can be transmitted between the first terminal device and the second terminal device through the control function entity. For example, the first terminal device can send a call request message for the call service to the second terminal device through the control function entity. If the second terminal device accepts the call request of the first terminal device, the second terminal device can send a call request message to the third terminal device through the control function entity. A terminal device sends a call response message, and after the first terminal device receives the call response message, media data associated with the call service can be transmitted between the first terminal device and the second terminal device. The call request message and the call response message are both signaling. The call request message can be, for example, a session establishment request message described below, and the call response message can be, for example, a session establishment response message described below. And, the call service associated information can be transmitted between the first terminal device and the second terminal device. media data. It can be understood that the media data associated with the call service can be transmitted between the first terminal device and the second terminal device through other possible functional entities (not shown in FIG. 1 ).

Further, the first terminal device can transfer the call service to the third terminal device. During the transfer process, the third terminal device can perform signaling interaction with the control function entity. After the transfer is completed, the third terminal device and Media data associated with the call service can be transmitted between the second terminal devices. In the embodiment of this application, the transfer of call services between different terminal devices is also called a "site shift". The device before the site shift (such as the first terminal device) can be called the device that initiates the site shift. Or site shift initiating device (site shift originating device). The device after the shift (such as the third terminal device) can be called the device that accepts the transition or the site shift terminating device (site shift terminating device).

The terminal equipment and control function entities are introduced in detail below.

(1)Terminal equipment

Terminal equipment may be called user equipment, terminal, mobile station, mobile terminal, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), and the Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, smart home devices, etc.; among them, wearable devices can be, for example, smart watches or head-mounted display devices (such as virtual reality (VR) ) head-mounted display), the smart home device can be a smart TV, for example. The embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment. In the embodiment of this application, the terminal device may include the functions of user equipment (UE) defined by the 3rd generation partnership project (3GPP) standard specifications.

(2) Control functional entity

As a possible implementation, the control function entity may include a registration function entity and a call function entity. The registration function entity is responsible for the registration of terminal devices, and the call function entity is used to implement call services between users of multiple terminal devices. Among them, the registration function entity can communicate with the call function entity. For example, the registration function entity can notify the call function entity of the successfully registered terminal device, and then for the successfully registered terminal device, the call function entity can provide call services to the user of the terminal device. For unregistered terminal equipment, the call function entity does not need to provide call services.

It can be understood that the entities in the embodiments of this application may also be called functional entities or network elements. Among them, the entity can be either a network element in a hardware device, a software function running on dedicated hardware, or a virtualized function instantiated on a platform (for example, a cloud platform). Optionally, the above entity can be implemented by one device, or can be implemented by multiple devices together, or can be a functional module in one device, which is not specifically limited in the embodiments of this application.

The network architecture and business scenarios described in the embodiments of this application are to more clearly explain the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art will know that with the communication With the evolution of the system and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

In the network architecture shown in Figure 1 above, the call services between different users can be call services provided by the Internet Protocol (IP) multimedia subsystem (IP multimedia subsystem, IMS) network, or they can also be other possible calls. Call services provided by the network. Among them, IMS network is a brand-new multimedia service form, which can meet users' newer and more diverse multimedia service needs. The IMS network uses the session initiation protocol (SIP) as the main signaling protocol, so that it can provide users with call services, such as audio call services, video call services, etc. In the embodiment of this application, the call service between different users is a call service provided by the IMS network as an example for description.

Refer to Figure 2, which is a schematic diagram of a possible network architecture of an IMS network. As shown in Figure 2, the network architecture can include home subscriber server (HSS), call session control function (CSCF) entities, service centralization and continuity application servers (service centralization and continuity application server, SCC AS), optionally, the IMS network can also include a DC server.

(1) HSS: It is the main storage of data related to users and services in the IMS network. The data stored in the HSS may include subscription information, access parameters and service trigger information, user security context, user network access authentication key information, roaming restriction information, etc.

(2) CSCF entity: It is the call control center of the IMS network and is used to implement the call session control function (CSCF). Exemplarily, the CSCF entity can be further divided into serving-call session control functions (serving-call session control function, S-CSCF) entity, proxy-CSCF (Proxy CSCF, P-CSCF) entity, query-CSCF (interrogating-CSCF, I-CSCF) entity.

Among them, the P-CSCF entity is the first connection point to access the IMS network, and all session messages originating from and terminating at terminal devices that support IMS must be forwarded through the P-CSCF entity. The S-CSCF entity is the control core of the IMS network and provides session control and registration functions for terminal devices. The I-CSCF entity can connect the S-CSCF entity and the P-CSCF entity and is used to provide terminal equipment with access to the home network.

(3) SCC AS: It is the application server of the IMS network, used to establish the data transmission channel (such as audio channel, video channel), etc.

(4) DC server: used to implement DC application functions. For example, when the user of the first terminal device and the user of the second terminal device are making a video call, if the user of the first terminal device triggers the DC application, the DC server can DC guidance channel 1 is established between the first terminal device and the DC server, and DC guidance channel 2 is established between the second terminal device and the DC server; further, the DC server can be between the first terminal device and the second terminal device. Establish a DC application channel to transmit DC application data. For example, the interactive data between the user of the first terminal device and the user of the second terminal device, such as liking each other, sending emoticons, etc., these interactive data can be used as data between users. This is supplemented by interactive data provided by microphones and cameras. The DC application data may also be other data, such as media data used for remote collaboration and desktop sharing, which are not limited in the embodiments of this application.

It can be understood that the IMS network may also include other possible functional entities or servers, which are not specifically limited.

Based on the description of Figure 2, when the call service between different users is the call service provided by the IMS network, the functions of the control function entity in Figure 1 can be implemented by one or more functional entities and/or servers in the IMS network. . For example, the function of the control function entity can be implemented by the HSS, CSCF entity and SCC AS (or HSS, CSCF entity, SCC AS and DC server) in the IMS network; further, when the control function entity includes the registration function entity and the call function When an entity is used, the function of the registration function entity can be realized by the HSS and CSCF entities, and the function of the call function entity can be realized by the CSCF entity, SCC AS and DC server.

The relevant technical features involved in the embodiments of the present application are first explained below. It can be understood that these explanations are intended to make the embodiments of the present application easier to understand and should not be regarded as limiting the scope of protection claimed by the present application.

1. Media data transmission business

As mentioned above, the call service may include audio call service and video call service. To implement the call service, a related device (such as a terminal device) can execute one or more media data transmission services, and each media data transmission service is used to transmit and/or present media data associated with the call service.

Among them, the audio call service can also be called a voice call service, and the media data associated with the audio call service can include audio data. Therefore, the relevant equipment of the audio call service can perform a media data transmission service, that is, the audio data transmission service; audio data transmission The service is used to transmit and/or present audio data associated with the audio call service. The media data associated with the video call service may include audio data and video data. Therefore, the relevant equipment of the video call service can perform two media data transmission services, namely the audio data transmission service and the video data transmission service; among which, the audio data transmission service uses The video data transmission service is used to transmit and/or present the audio data associated with the video call service. The video data transmission service is used to transmit and/or present the video data associated with the video call service. It can be understood that in other possible embodiments, audio data may also be included in video data. In the embodiment of this application, the video data does not include audio data as an example for description.

The call service may refer to a call service between two users, or may refer to a call service between two or more users. In the embodiment of this application, the call service between two users is taken as an example for description. For example, regarding the call service between the user of the first terminal device and the user of the second terminal device, both the first terminal device and the second terminal device are related devices for the call service. From the perspective of the first terminal device, The first terminal device may perform one or more media data transmission services, that is, the first terminal device may transmit and/or present media data associated with the call service.

(1) The first terminal device transmits the media data associated with the call service, which may include: the first terminal device pushes the media data associated with the call service to the second terminal device, and/or receives the call service association pushed by the second terminal device media data. Exemplarily, the first terminal device pushes the media data associated with the call service to the second terminal device, which may mean: the first terminal device obtains the media data (for example, the first terminal device collects audio data through the microphone on the first terminal device) ), encode the media data, and send the encoded media data. The first terminal device receiving the media data associated with the call service pushed by the second terminal device may refer to the first terminal device receiving the encoded media data sent by the second terminal device and decoding the media data to obtain the media data.

(2) The first terminal device presents the media data associated with the call service, which may include: the first terminal device pushes the second terminal device The media data is presented (for example, if the call service is a video call service, the first terminal device plays the audio data pushed by the second terminal device as sound, displays the video data pushed by the second terminal device as animation, etc.), and/or , and present the media data pushed to the second terminal device (for example, if the call service is a video call service, the first terminal device can display the video data collected by the first terminal device as animation).

2. Call light application

In order to meet the further needs of users during calls (such as screen sharing, remote collaboration, etc.), the call light application is currently introduced. The call light application is a call application that supports running during calls (such as audio calls or video calls). Light applications can also be called light applications or data channel (DC) applications. DC applications can be, for example, screen sharing, remote collaboration, or other possible applications, and are not specifically limited.

For example, when the user of the first terminal device and the user of the second terminal device are having an audio call, the user of the first terminal device can trigger the DC application. Referring to (a) in Figure 3, the audio call interface of the first terminal device may include a control for triggering the DC application. (a) in Figure 3 identifies the control by "DC application". The first terminal The user of the device can perform operations on the "DC application" (such as clicking "DC application") to trigger the DC application during the audio call. In other words, DC application functions can be superimposed on the audio call service.

For another example, when the user of the first terminal device and the user of the second terminal device are having a video call, the user of the first terminal device can trigger the DC application. Referring to (b) in FIG. 3 , the video call interface of the first terminal device may include a control for triggering the DC application. (b) in FIG. 3 identifies the control by "DC application". The user of the first terminal device can perform an operation on the "DC application" (for example, click "DC application"), thereby triggering the DC application during the video call. In other words, DC application functions can be superimposed on the video call service.

In this way, by superimposing the DC application function in the call service, taking the superimposed screen sharing function as an example, the user of the first terminal device can draw a pattern on the shared screen, and the user of the second terminal device can see it in real time on the shared screen. The pattern drawn by the user of the first terminal device can effectively improve the user experience. It can be understood that in other possible embodiments, the user can also trigger the DC application in other possible ways. The following description of the embodiment of this application will take the user triggering the DC application during the call as an example.

Media data corresponding to DC applications may be called DC application data (or may be referred to as DC data). For example, DC data corresponding to DC applications such as screen sharing or remote collaboration may include operation data such as drawing or annotation. When the DC application function is superimposed on the audio call service, the media data associated with the audio call service can include audio data and DC data; in this case, the audio call service can include two media data transmission services, namely the audio data transmission service and the DC application function. DC data transmission service; wherein, the audio data transmission service is used to transmit and/or present the audio data associated with the audio call service, and the DC data transmission service is used to transmit and/or present the DC data associated with the audio call service. When the DC application function is superimposed on the video call service, the media data associated with the video call service can include audio data, video data and DC data; in this case, the video call service can include three media data transmission services, namely audio data Transmission service, video data transmission service and DC data transmission service; among them, the audio data transmission service is used to transmit and/or present the audio data associated with the video call service, and the video data transmission service is used to transmit and/or present the audio data associated with the video call service. Video data, DC data transmission service is used to transmit and/or present DC data associated with the video call service.

In order to facilitate the differentiation of different media data transmission services, the embodiment of the present application introduces the identifier of the media data transmission service. For example, the identifier of the audio data transmission service is "audio", the identifier of the video data transmission service is "video", and the identifier of the DC data transmission service is "video". The identifier of the service is "application"; it can also be understood as: the identifier of audio data is "audio", the identifier of video data can be "video", and the identifier of DC data is "application".

3. Session and data transmission channels

The session can be used to provide connectivity services between different terminal devices (such as a first terminal device and a second terminal device), or in other words, the session can be used to realize the exchange of media data between the first terminal device and the second terminal device. transmission. In one example, the session may refer to an application layer session, such as a SIP session or a media session.

In this embodiment of the present application, the session may correspond to the call service. Taking the video call service between the user of the first terminal device and the user of the second terminal device as an example, when the user of the first terminal device and the user of the second terminal device need to make a video call, the first terminal device and the second terminal device A session corresponding to the video call service can be established between terminal devices.

Considering that the relevant equipment of the call service may need to perform multiple media data transmission services, and different media data transmission services have different transmission requirements, therefore, the session corresponding to the call service may include multiple data transmission channels, and different data transmission channels are used to meet Different transmission needs. For example, if the equipment related to the video call service needs to perform audio data transmission service, video data transmission service and DC data transmission service, the session corresponding to the video call service can include data transmission channel 1, data transmission channel 2 and data transmission channel 3. Data transmission channel 1 is used for the audio data transmission service to transmit audio data, data transmission channel 2 is used for the video data transmission service to transmit video data, and data transmission channel 3 is used for the DC data transmission service to transmit DC data. For ease of description, data transmission channel 1 can be called the audio channel, data transmission channel 2 can be called the video channel, and data transmission channel 3 can be called the DC application channel.

4. Registration process, session establishment process and session modification process

In the network architecture shown in Figure 1, taking the first terminal device as an example, the first terminal device can register using the user ID of the first terminal device. After the registration is successful, the user of the first terminal device communicates with the second terminal device. Users can establish a session corresponding to the call service through the session establishment process. Further, during the call between the first terminal device and the second terminal device, if the DC application is triggered, the first terminal device and the second terminal device can establish a DC application channel through the session modification process to transmit DC data.

The registration process, session establishment process, and session modification process are described below respectively.

(1)Registration process

Figure 4 illustrates a possible registration process for a terminal device to register with a registration function entity, taking the first terminal device as an example. In the registration process, the first terminal device may use the user identification of the first terminal device to request the registration function entity for credential information, and then register with the registration function entity based on the credential information. As shown in Figure 4, the process may include:

S401. The terminal device sends request message 1 to the registration function entity.

For example, the request message 1 may include the user identification and device identification of the terminal device, and optionally may also include time information. The time information is used to indicate the time when the terminal device sends the request message 1. Among them, the user identity of the terminal device can be, for example, an international mobile subscriber identity (IMSI) or a temporary mobile subscriber identity (TMSI), and is not specifically limited. The device identification of the terminal device may be, for example, the serial number of the terminal device.

For example, when the function of the registration function entity is implemented by the HSS and CSCF entities, the terminal device sends the request message 1 to the registration function entity, which may mean that the terminal device can obtain the P-CSCF entity through the P-CSCF discovery process. address information, and then sends a request message 1 to the P-CSCF entity. The P-CSCF discovery process can refer to the existing technology.

S402: After receiving the request message 1, the registration function entity generates credential information according to the request message 1, and sends a response message 1 to the terminal device, where the response message 1 includes the credential information.

Here, there may be multiple ways for the registration function entity to generate the credential information based on the request message 1. For example, taking the request message 1 including the user ID, device ID and time information of the terminal device as an example, the registration function entity can use the public key to encrypt the user ID, device ID and time information of the terminal device to obtain the voucher information. Among them, "certificate" can also be replaced by "certification" or other similar nouns, and there is no specific limit.

S403: After receiving the response message 1, the terminal device sends a request message 2 to the registration function entity. The request message 2 includes the credential information and the registration identification of the terminal device. The registration identifier of the terminal device may include a local tag of the terminal device (which may also be called a source tag (from-tag)). The local tag of the terminal device may be a random string generated by the terminal device.

For example, the request message 2 may also include other possible information, such as the user ID of the terminal device and the IP address of the terminal device, which are not specifically limited.

S404. After receiving the request message 2, the registration function entity uses the private key corresponding to the public key to decrypt the certificate information. If the decryption is successful, it sends a response message 2 to the terminal device. The response message 2 is used to indicate that the terminal device has successfully registered. Furthermore, after the terminal device receives the response message 2, it can determine that the registration is successful.

For example, if the request message also includes time information, after the registration function entity successfully decrypts the credential information, it can also determine whether the interval between the reception time of request message 2 and the time indicated by the time information is less than or equal to the time threshold. , if so, response message 2 can be sent to the terminal device, otherwise, it can be determined that the terminal device registration failed. The time threshold may be pre-configured for the registration function entity.

S405: The registration function entity sends the registration information of the terminal device to the call function entity.

For example, the registration information may include the registration identification of the terminal device (such as the local tag), the user identification of the terminal device, and the address information of the terminal device (such as the IP address).

Among them, the local label of the terminal device is used to indicate that the call function entity terminal device has the ability to initiate a call. For example, if the call function entity subsequently receives a session establishment request message or session modification request message (session establishment request message or session modification request message) from the terminal device, If the request message carries the local tag of the terminal device), the terminal device can be determined to be a successfully registered terminal device based on the local tag of the terminal device, and then the session establishment request message or session modification request message of the terminal device can be processed. , please refer to session establishment process and session modification process for details.

The user identification of the terminal device and the address information of the terminal device are used by the call function entity to forward messages from other terminal devices to the terminal device. message, for example, if the call function entity subsequently receives a session establishment request message sent by another terminal device (the session establishment request message includes the user identification of the terminal device), it can forward the session establishment request to the terminal device according to the address information of the terminal device. information.

(2) Session establishment process

When the call service between different users (such as the user of the first terminal device and the user of the second terminal device) is the call service provided by the IMS network, since the IMS network uses SIP as the main signaling protocol, the first terminal The device and the second terminal device may establish a session corresponding to the call service and/or modify the session corresponding to the call service based on the SIP message. The SIP message can include a SIP header and a SIP body. The SIP header can include information such as a user identification. The SIP body can use the session description protocol (SDP) to describe the media parameters. For example, the media parameters can include at least one of the following: Items: The identification, encoding method, sampling rate, and address information of the data transmission channel of the media data transmission service.

Figure 5 illustrates a possible session establishment process. In Figure 5, the first terminal device is the calling party and the second terminal device is the called party. As shown in Figure 5, the process can include:

S501: After detecting that the user triggers the call service, the first terminal device sends the session establishment request message 1 to the call function entity; accordingly, the call function entity receives the session establishment request message 1.

For example, the session establishment request message 1 may be a SIP message, and the SIP header of the session establishment request message 1 may include the user identification of the first terminal device, the call identification (denoted as Call-ID1), and the local label (denoted as from -tag1), the user ID of the second terminal device. The call identifier is a string generated by the first terminal device, and the call identifiers corresponding to different sessions of the first terminal device may be different. The SIP text (ie, SDP information) in the session establishment request message 1 may include the media parameters of the first terminal device, and may also include other possible information, such as SDP version number, session name, etc. For example, the media parameters of the first terminal device may include the identification of the media data transmission service requested by the first terminal device, the address information of the data transmission channel corresponding to the media data transmission service on the first terminal device side (for example, including the IP address and port number), etc. Taking the call service as a video call service as an example, see Table 1 for an example of the format of the session establishment request message 1.

Table 1: Session establishment request message 1 example

It can be understood that the parameters shown in Table 1 are only an example, and the SIP header and SIP body of the SIP message may also include other possible parameters, which are not specifically limited.

S502. After receiving the session establishment request message 1, the call function entity determines that the first terminal device has been successfully registered, and then sends the session establishment request message 2 to the second terminal device; accordingly, the second terminal device receives the session establishment request message. 2.

For example, after receiving the session establishment request message 1, the call function entity determines that the first terminal device is a registered terminal device according to the local tag in the session establishment request message 1, and can then process the session establishment request message 1. Afterwards, the session establishment request message 2 is sent to the second terminal device. For example, the call function entity can generate a new Call-ID (denoted as Call-ID2) based on Call-ID1 in the session establishment request message, and generate a new tag (denoted as Call-ID2) based on from-tag1 in the session establishment request message. from-tag2), the session establishment request message 2 may include Call-ID2 and from-tag2 to improve the security of the call.

Taking the call service as a video call service as an example, see Table 2 for an example of the format of the session establishment request message 2.

Table 2: Session establishment request message 2 example

S503. After the user of the second terminal device answers the call, the second terminal device can send a session establishment response message 1 to the call function entity. For example, the session establishment response message 1 is a 200 OK message; accordingly, the call function entity receives the session establishment response message. 1.

For example, the SIP header of the session establishment response message 1 may include the user ID of the first terminal device, Call-ID2, from-tag2, the user ID of the second terminal device, and the remote tag (to- tag1); the SIP text (i.e., SDP information) in the session establishment response message 1 may include media parameters accepted by the second terminal device, such as the media data transmission service accepted by the second terminal device and the data transmission channel corresponding to the media data transmission service. The address information on the second terminal device side (for example, including IP address and port number), etc. Taking the call service as a video call service as an example, see Table 3 for an example of the format of the session establishment response message 1.

Table 3: Example of session establishment response message 1

It can be understood that if the second terminal device accepts the media data transmission service (such as audio data transmission service) requested by the first terminal device, the corresponding port number can be carried in the session establishment response message 1; if the second terminal device If the media data transmission service requested by the first terminal device is not accepted, the session establishment response message 1 may not carry the corresponding port number (for example, 0 may be used to represent the port number).

S504: After receiving the session establishment response message 1, the call function entity sends the session establishment response message 2 to the first terminal device; accordingly, the terminal device receives the session establishment response message 2.

For example, the call function entity can process the session establishment response message 1, for example, according to the Call-ID2 in the session establishment response message 1, determine the Call-ID1 corresponding to the Call-ID2, and according to the from in the session establishment response message 1 -tag2, determine from-tag1 corresponding to from-tag2, and generate to-tag2 based on to-tag1 in session establishment response message 1, and then send session establishment response message 2, session establishment response message 2 to the second terminal device Includes Call-ID1, from-tag1 and to-tag2.

Taking the call service as a video call service as an example, see Table 4 for an example of the format of the session establishment response message 2.

Table 4: Example of session establishment response message 2

Through the above S501 to S504, a session corresponding to the call service is established between the first terminal device and the second terminal device. The session includes an audio channel and a video channel, and the first terminal device and the second terminal device can transmit through the audio channel. Audio data associated with the call service, and video data associated with the call service transmitted through the video channel.

It can be understood that the above process is only an example. In specific implementation, the session establishment process may also include other possible steps. For example, before the user of the second terminal device answers the call, the second terminal device may send a call to the first terminal device. Sends a ring response, which is used to indicate that a response is awaited.

(3) Session modification process

There may be multiple situations that trigger the session modification process. For example, when the first terminal device and the second terminal device transmit media data associated with the call service through the established session, if the first terminal device detects that the user triggers DC during the call. By operating the application, the session modification process can be initiated, and a DC application channel between the first terminal device and the second terminal device can be established through the session modification process.

Figure 6 illustrates a possible session modification process. As shown in Figure 6, the process may include:

S601: Transmit media data associated with the call service between the first terminal device and the second terminal device.

S602: After detecting that the user triggers an operation of the DC application during the call, the first terminal device sends a session modification request message 1 to the call function entity.

Here, after detecting that the user triggers the DC application operation during the call, the first terminal device can determine that the DC application function needs to be superimposed on the call service, and then can send the session modification request message 1 to the call function entity, the session modification request message 1 is used to request to add a DC application channel in the session corresponding to the call service to transmit DC data.

For example, the session modification request message 1 may include the identifier of the session and the SDP information of the first terminal device; wherein the identifier of the session may include from-tag1, to-tag2 and Call-ID1; and the SDP information of the first terminal device may include the Media parameters of a terminal device. Compared with the session establishment request message 1, the media parameters carried in the session modification request message 1 may further include the identification of the DC data transmission service (ie, application) and the address information of the DC application channel on the first terminal device side.

See Table 5 for an example of the format of session modification request message 1.

Table 5: Session modification request message 1 example

S603: After receiving the session modification request message 1, the call function entity sends the session modification request message 2 to the second terminal device; accordingly, the second terminal device receives the session modification request message 2.

For example, the call function entity may process the session modification request message 1, and then send the session modification request message 2 to the second terminal device. The session modification request message 2 includes Call-ID2, from-tag2 and to-tag1.

Taking the call service as a video call service as an example, see Table 6 for an example of the format of the session modification request message 2.

Table 6: Session modification request message 2 example

S604, if the second terminal device accepts the session modification, the second terminal device may send the session modification response message 1 to the call function entity; accordingly, the call function entity receives the session modification response message 1.

For example, the SIP header of the session modification response message 1 may include the user ID of the first terminal device, Call-ID2, from-tag2, the user ID of the second terminal device, and the remote tag (to- tag1); the SIP text (ie, SDP information) in the session establishment response message 1 may include media parameters accepted by the second terminal device. Compared with the session establishment response message 1, the media parameters carried in the session modification request message 1 may further include the identification of the DC data transmission service (ie, application) and the address information of the DC application channel on the second terminal device side. Taking the call service as a video call service as an example, see Table 7 for an example of the format of the session modification response message 1.

Table 7: Session modification response message 1 example

S605: After receiving the session modification response message 1, the call function entity sends the session modification response message 2 to the first terminal device; accordingly, the terminal device receives the session modification response message 2.

For example, the call function entity may process the session modification response message 1, and then send a session establishment response message 2 to the first terminal device. The session establishment response message 2 includes Call-ID1, from-tag1 and to-tag2, and further Includes media parameters of the second terminal device.

Taking the call service as a video call service as an example, see Table 8 for an example of the format of the session modification response message 2.

Table 8: Session modification response message 2 example

Through the above S601 to S605, the first terminal device and the second terminal device establish a DC application channel in the session corresponding to the call service. At this time, the session corresponding to the call service includes an audio channel, a video channel and a DC application channel, and then the third terminal device establishes a DC application channel in the session corresponding to the call service. The first terminal device and the second terminal device may transmit audio data associated with the call service through the audio channel, transmit video data associated with the call service through the video channel, and transmit DC data associated with the call service through the DC application channel.

5. Near Field Communication Connection

A short-range communication connection may refer to a connection established between multiple terminal devices through short-range communication technology. The connection may be a point-to-point connection or a point-to-multipoint connection. In the embodiment of this application, Take point-to-point connections as an example. Among them, "near field communication" may refer to "near field wireless communication". Short-range communication technology may refer to communication technology whose communication distance is less than or equal to a preset distance threshold. For example, the preset distance threshold may be 10 meters (m), 5m, 1m, 30 centimeters (cm), 10cm or 5cm, etc.

Taking the first terminal device and the second terminal device as an example, when the first terminal device and the second terminal device both support and enable the near field communication function, the first terminal device can send broadcast message 1, and the second terminal device can send broadcast message 1. Message 2. If the first terminal device and the If the communication distance between the two terminal devices is less than or equal to the preset distance threshold, the first terminal device can receive the broadcast message 2 from the second terminal device, and the second terminal device can receive the broadcast message 1 from the first terminal device. , and then the first terminal device and the second terminal device can establish a short-range communication connection based on the broadcast messages received respectively. Taking the first terminal device as an example, the broadcast message of the first terminal device may include a broadcast identification (ID) of the first terminal device, and the broadcast ID of the first terminal device may be used by other devices to identify the first terminal device. For example, the broadcast identification of the first terminal device may be generated by the first terminal device. The embodiment of the present application does not limit the specific generation method of the broadcast identification.

There are many types of near-field communication technologies, and different near-field communication technologies can correspond to different near-field communication connections. For example, if the short-range communication technology is near field communication (NFC) technology, the corresponding short-range communication connection is an NFC connection. The preset distance threshold corresponding to the NFC technology can be, for example, 10cm; that is, when two When an NFC-enabled terminal device is touched, an NFC connection can be established between the two terminal devices. For another example, if the short-range communication technology is wireless fidelity (Wi-Fi) communication technology, the corresponding short-range communication connection can be a Wi-Fi connection, and the preset distance threshold corresponding to the Wi-Fi technology can be, for example, 10m. . The two types of near field communication connections are introduced below.

(1)NFC connection

Taking the first terminal device and the second terminal device as an example, after an NFC connection is established between the first terminal device and the second terminal device, the first terminal device and the second terminal device can communicate through the NFC data exchange format (NFC data exchange format). , NDEF) protocol to transmit short-range messages, and short-range messages can be called NDEF messages.

An NDEF message consists of one or more NEDF records. NEDF Record is the smallest unit in an NDEF message. A NEDF Record can include a header and a payload.

(2)Wi-Fi connection

Taking the first terminal device and the second terminal device as an example, after a Wi-Fi connection is established between the first terminal device and the second terminal device, the first terminal device and the second terminal device can send short-range messages through the UPNP protocol. Proximity messages can be called hypertext transfer protocol (HTTP) messages.

HTTP messages can include request lines, request headers, blank lines, and request data. Among them, the request line includes the request method field, etc., the request header includes keyword/value pairs, and the empty line is an empty line after the last request header to indicate that there are no more request headers below.

It can be understood that the above description takes the short-range communication technology as NFC technology or Wi-Fi communication technology as an example. The short-range communication technology in the embodiment of the present application can also be other possible technologies, such as Bluetooth communication technology, Bluetooth The short-range communication connection corresponding to the communication technology may be a Bluetooth connection.

In the network architecture shown in FIG. 1 , the first terminal device can transfer the call service (that is, the call service between the user of the first terminal device and the user of the second terminal device) to the third terminal device. As mentioned above, in order to realize the call service, the first terminal device can perform one or more media data transmission services. Therefore, the first terminal device transfers the call service to the third terminal device, which may refer to the first terminal device. Hand over part or all of one or more media data transmission services to a third terminal device.

In the following embodiments of the present application, the specific implementation of transferring the call service from the first terminal device to the third terminal device will be studied. It can be understood that the communication method provided below in the embodiments of the present application can also be called a handover method for media data transmission services; in the first to third embodiments of the embodiments of the present application below, the communication method will be applied to The network architecture shown in Figure 1 is taken as an example. That is to say, the execution subject of the communication method described in Embodiment 1 to Embodiment 3 may include the first terminal device, the second terminal device, the third terminal device in Figure 1, Register functional entities and call functional entities.

A communication method provided by the embodiment of the present application is: the first terminal device sends handover instruction information to the third terminal device through the call function entity, so that the call service is transferred from the first terminal device to the third terminal device. The handover instruction information may also be called transition instruction information or other descriptions, and is not specifically limited.

The communication method will be described in detail below with reference to Embodiment 1.

Embodiment 1

Figure 7 is a schematic flowchart corresponding to the communication method provided in Embodiment 1 of the present application. As shown in Figure 7, the process may include:

S701: The first terminal device and the third terminal device are bound.

Here, the first terminal device and the third terminal device may be bound in multiple ways. For example, the first terminal device may be installed with an application for implementing transitions (for convenience of description, it is called a transition application), and an account is registered on the transition application, which is called an account. 1; The third terminal device can have a transition application installed and register an account on the transition application, which is called account 2. Further, the user can bind the account 1 of the first terminal device and the account 2 of the third terminal device by performing corresponding operations on the first terminal device and/or the third terminal device.

For example, before the first terminal device and the third terminal device are bound, the first terminal device and the third terminal device may respectively register with the registration function entity through the registration process described above.

S702: The first terminal device performs M media data transmission services between the first terminal device and the second terminal device (not shown in Figure 7).

Here, each of the M media data transmission services may be used to transmit and/or present media data associated with the call service between the user of the first terminal device and the user of the second terminal device.

For example, the first terminal device and the second terminal device may establish a session corresponding to the call service through the session establishment process described above, and optionally, the session may also be modified through the session modification process described above. For example, if the call service is a video call service, the M media data transmission services may include audio data transmission services, video data transmission services and DC data transmission services.

For example, before S702, the second terminal device may register with the registration function entity through the registration process described above.

S703. The first terminal device sends a first transition request message to the call function entity. The first transition request message includes handover instruction information. The handover instruction information instructs the third terminal device to perform the communication between the third terminal device and the second terminal device. P media data transmission services, the P media data transmission services are used to replace N media data transmission services among the M media data transmission services. Among them, N can be less than M, or it can also be equal to M.

Here, since the account 1 of the first terminal device is bound to the account 2 of the third terminal device, when the first terminal device detects the user's transition operation, the first terminal device can, based on the pre-bound account, It is determined that transfer to the third terminal device is required, and a first transfer request message is sent to the call function entity.

For example, the handover instruction information may include the user identification of the second terminal device and/or the identification of the session corresponding to the call service (ie, the session between the first terminal device and the second terminal device). Optionally, the handover instruction information may also include handover object information, and the handover object information is used to indicate the handover object; wherein the handover object may be a default, for example, the handover object is N media data transmission services. In addition, the first transition request message may also include other possible information, such as the user identification of the third terminal device and/or the registration identification of the third terminal device.

The size relationship between N and P is explained here: P can be less than N, or it can be equal to N, or it can be greater than N. That is to say, after the transition, the third terminal device can merge multiple media data transmission services among the N media data transmission services into one media data transmission service, and the merged media data transmission service is used to replace the previous one. multiple media data transmission services; or, the third terminal device can also split one of the N media data transmission services into multiple media data transmission services, and the multiple media data transmission services after splitting Used to replace a media data transmission business before the split. In an example, if P equals N, then P media data transmission services can correspond to N media data transmission services one-to-one. For example, the media data transmission service p1 among the P media data transmission services corresponds to N media data transmission services. The media data transmission service n1 in means that the media data transmission service p1 is used to replace the media data transmission service n1.

S704: After receiving the first transfer request message, the call function entity sends a second transfer request message to the third terminal device, where the second transfer request message includes handover instruction information.

Here, the call function entity may send the second transfer request message to the third terminal device according to the user ID of the third terminal device and/or the registration ID of the third terminal device included in the first transfer request message.

S705: After receiving the second transition request message, the third terminal device executes P media data transmission services between the third terminal device and the second terminal device according to the handover instruction information, thereby completing the transition of the call service.

S706: After determining that the third terminal device has started executing P media data transmission services, the first terminal device suspends or terminates execution of N media data transmission services.

Here, if N is less than M, the first terminal device can continue to perform M-N media data transmission services between the first terminal device and the second terminal device, and suspend or terminate the execution of N media data transmission services. If N equals M, the first terminal device may suspend or terminate the execution of N media data transmission services.

There may be multiple ways for the first terminal device to determine that the third terminal device has started to perform P media data transmission services. For example, the third terminal device may send a handover completion message to the first terminal device after starting to perform P media data transmission services. The handover completion message is used to indicate that the third terminal device has started to perform P media data transmission services. It can be understood that in other possible embodiments, the first terminal device may also suspend execution after determining that the third terminal device is ready to perform P media data transmission services. Or terminate the execution of N media data transmission services.

For example, according to the foregoing description, media data transmission services have a one-to-one correspondence with data transmission channels. Therefore, N media data transmission services may correspond to N data transmission channels between the first terminal device and the second terminal device. The first terminal device suspends execution of N media data transmission services, which may mean that the first terminal device suspends the transmission of media data with the second terminal device through N data transmission channels, but does not release or delete the N data transmission channels. Terminating the execution of N media data transmission services by the first terminal device may mean that the first terminal device releases or deletes N data transmission channels to terminate the transmission of media data with the second terminal device through the N data transmission channels.

Using this method, the first terminal device transfers the call service based on the pre-established binding relationship. That is to say, the first terminal device can only transfer the call service to the terminal pre-bound by the first terminal device. equipment, for example, when the first terminal device is bound to the third terminal device, the first terminal device can transfer the call service to the third terminal device; if the user of the first terminal device wants to transfer the call service to the third terminal device, For terminal devices other than the terminal device (such as the fourth terminal device), you need to first unbind the first terminal device from the third terminal device, and bind the first terminal device to the fourth terminal device before the call can be completed. The business transitions to the fourth terminal device. In addition, since the first terminal device and the third terminal device need to communicate through the call function entity, a large delay in transition of the call service will be caused.

Another communication method provided by the embodiment of the present application is: the first terminal device sends handover instruction information to the third terminal device through a short-range communication connection, so that the call service is transferred from the first terminal device to the third terminal device.

The communication method will be described in detail below with reference to Embodiment 2 and Embodiment 3.

Embodiment 2

Figure 8 is a schematic flowchart corresponding to the communication method provided in Embodiment 2 of the present application. As shown in Figure 8, the process may include:

S801: The first terminal device performs M media data transmission services between the first terminal device and the second terminal device (not shown in Figure 8).

Here, the M media data transmission services may refer to the description in Embodiment 1.

Exemplarily, before S801, the first terminal device may use the user identification of the first terminal device to register with the registration function entity through the registration process described above, and the second terminal device may use the user identification of the second terminal device to register with the registration function entity through The registration process described above registers with the registration function entity.

S802. The first terminal device sends a transition request message to the third terminal device through a short-range communication connection. The transition request message includes handover instruction information. The handover instruction information instructs the third terminal device to perform a transfer between the third terminal device and the second terminal device. There are P media data transmission services between, and the P media data transmission services are used to replace the N media data transmission services in the M media data transmission services.

For example, after the first terminal device determines that it needs to transfer to the third terminal device, it may send a transfer request message to the third terminal device through a short-range communication connection, where the transfer request message includes handover instruction information. Optionally, the transition request message may also include other possible information, which is not specifically limited.

1. The first terminal device determines that it needs to transfer to the third terminal device.

In this embodiment of the present application, there may be multiple situations in which the first terminal device determines that it needs to transition to the third terminal device.

For example, while the first terminal device is performing M media data transmission services, if the first terminal device establishes a short-range communication connection with the third terminal device, the first terminal device may determine that it needs to transfer to the third terminal device. . Specifically, during the process of the first terminal device performing M media data transmission services, if the user of the first terminal device turns on the near field communication function of the first terminal device, the first terminal device can use the near field communication technology. Scan nearby devices, and when the third terminal device is scanned, a short-range communication connection can be established with the third terminal device, and it is determined that the scene needs to be transferred to the third terminal device. For example, if the short-range communication connection is an NFC connection, then when the user touches the first terminal device and the third terminal device, the first terminal device can determine that it needs to transfer to the third terminal device, and then through the embodiment The method in Embodiment 2 or 3 is used to transfer the scene to the third terminal device, thereby realizing a "touch-and-click transition".

For another example, during the process of the first terminal device performing M media data transmission services, if the first terminal device establishes a short-range communication connection with the third terminal device, the first terminal device can ask the user of the first terminal device. Whether the call service needs to be transferred to the third terminal device, if the user confirms that the call service needs to be transferred to the third terminal device, the first terminal device can determine that the call service needs to be transferred to the third terminal device, and then through the second embodiment or The method in Embodiment 3 transitions to the third terminal device.

For another example, while the first terminal device is executing M media data transmission services, if the first terminal device detects the user's transition operation (for example, the call interface of the first terminal device can display controls corresponding to the transition operation, The first terminal device can detect in real time whether the user has triggered the control), it can start the near field communication technology to scan nearby devices, and if the third terminal device is scanned, it can Establish a near field communication connection with the third terminal device (or the first terminal device has established a near field communication connection with the third terminal device before detecting the user's transition operation), and determines that it needs to transition to the third terminal device. The terminal device then transitions to the third terminal device through the method in Embodiment 2 or Embodiment 3, thereby realizing "one-click transition". It can be understood that if the first terminal device scans multiple candidate terminal devices (including the third terminal device), the user can select the third terminal device from the multiple candidate terminal devices.

2. Handover instruction information

For example, the handover instruction information may include the user identification of the second terminal device and/or the identification of the session corresponding to the call service (ie, the session between the first terminal device and the second terminal device).

(1) As a possible implementation, the handover instruction information may also include handover object information. The handover object information is used to indicate that the handover object is N media data transmission services. For example, the handover object information may include the identifiers of N media data transmission services. .

In this embodiment of the present application, the first terminal device may determine the handover object in multiple ways.

For example, the first terminal device can obtain the media capability information of the third terminal device. The media capability information is used to indicate the media data transmission service supported by the third terminal device. Then the first terminal device can obtain the media capability information of the third terminal device. Determine the handover object. For example, M media data transmission services include audio data transmission services, video data transmission services and DC data transmission services. If the media data transmission services supported by the third terminal device include audio data transmission services, video data transmission services are not included. DC data transmission service, the first terminal device can determine that the handover object is the audio data transmission service.

For another example, the first terminal device may obtain the media capability information of the third terminal device, and determine the initial handover object based on the media capability information of the third terminal device; and ask the user of the first terminal device whether to transfer the initial handover object to the user. field to a third terminal device. For example, the initial handover object includes N1 media data transmission services. The user can select N media data transmission services from the N1 media data transmission services. The N media data transmission services are part or all of the media in the N1 media data transmission services. The first terminal device can determine the N media data transmission services selected by the user as the handover objects.

There are many ways for the first terminal device to obtain the media capability information of the third terminal device. For example, after the first terminal device establishes a near-field communication connection with the third terminal device, the third terminal device sends a request to the third terminal device through the near-field communication connection. A terminal device sends media capability information of a third terminal device.

(2) As another possible implementation, the handover instruction information may not include handover object information. In this case, the handover object may be predefined by the protocol or be defaulted.

3. How the first terminal device sends a transition request message to the third terminal device

For example, if the near field communication connection is an NFC connection, the transition request message sent by the first terminal device to the third terminal device may be an NDEF message. The payload of the NDEF message includes information in JSON format, and the information in JSON format includes handover instruction information. . See Table 9 for an example of a transition request message.

Table 9: Transition request message example 1

For another example, if the near field communication connection is a WiFi connection, the transition request message sent by the first terminal device to the third terminal device may be an HTTP message. The request data of the HTTP message may include information in JSON format, and the information in JSON format may include handover information. Instructions. See Table 10 for another example of a transition request message.

Table 10: Transition request message example 2

S803: The third terminal device performs P media data transmission services according to the scene transition request message.

Exemplarily, before S803, the third terminal device can use the user identification of the third terminal device to register with the registration function entity through the registration process described above. After the registration is successful, the third terminal device can execute P media Data transmission business.

S804: After determining that the third terminal device has started executing P media data transmission services, the first terminal device suspends or terminates execution of N media data transmission services.

Using the method in the second embodiment, the first terminal device sends handover instruction information to the third terminal device through the short-range communication connection, so that the first terminal device can transfer the call service to the third terminal device. In this way, since the first terminal device and the third terminal device do not need to be pre-bound, a "one-click transition" can be realized for the user (for example, the user can trigger the transition button on the first terminal device to transfer the scene to another scene). The call service of the first terminal device is transferred to the third terminal device) or "touch transfer" (for example, the user touches the first terminal device and the third terminal device to transfer the call service of the first terminal device to the third terminal device). transition to the third terminal device), which can effectively improve the user experience; and, because the first terminal device and the third terminal device can communicate directly through the short-range communication connection, compared with the first terminal device and the third terminal device through In terms of the way call function entities communicate, the implementation of transition is relatively simple and can effectively reduce transition delay.

Embodiment 3

Figure 9 is a schematic flowchart corresponding to the communication method provided in Embodiment 3 of the present application. As shown in Figure 9, the process may include:

S901: The first terminal device performs M media data transmission services between the first terminal device and the second terminal device (not shown in Figure 9).

Here, the M media data transmission services may refer to the description in Embodiment 1.

Exemplarily, before S801, the first terminal device may use the user identification of the first terminal device to register with the registration function entity through the registration process described above, and the second terminal device may use the user identification of the second terminal device to register with the registration function entity through The registration process described above registers with the registration function entity.

S902: The first terminal device sends a first registration request message to the third terminal device through a short-range communication connection.

Here, the first registration request message may include handover credential information and the user identification of the first terminal device, and optionally may also include address information of the registration function entity. The address information of the registered functional entity may refer to the address information of the P-CSCF entity, for example.

For example, after the first terminal device determines that it needs to transfer to the third terminal device, it can obtain the status information of the third terminal device. If the third terminal device is in an unregistered state, it can obtain the handover voucher information and provide it to the third terminal device. The terminal device sends the first registration request message; if the third terminal device is in the registration state, S906 can be executed.

(1) There are many ways for the first terminal device to obtain the handover voucher information. As a possible implementation, the first terminal device can determine the device identity of the third terminal device based on the broadcast identity in the broadcast message of the third terminal device, and initiate a handover credential information request message to the registration function entity. The handover credential information request message It may include the user identification of the first terminal device and the device identification of the third terminal device. Optionally, it may also include time information. The time information is used to indicate the time when the first terminal device sends the handover credential information request message. Correspondingly, after receiving the handover voucher information request message, the registration function entity can generate the handover voucher information according to the information carried in the handover voucher information request message, and send the handover voucher information to the first terminal device. Among them, the registered functional entity shall To implement the information request message to generate handover credential information, please refer to the description of "Registration Function Entity Generates Credential Information" in the previous article.

(2) There are many ways for the first terminal device to obtain the status information of the third terminal device. For example, after the first terminal device establishes a near-field communication connection with the third terminal device, the third terminal device sends the status information of the third terminal device to the first terminal device through the near-field communication connection.

It can be understood that in other possible embodiments, the first terminal device can also obtain the handover voucher information after determining that it needs to transfer to the third terminal device, and send the handover voucher information to the third terminal device without Determine the status information of the third terminal device. In this case, after the third terminal device receives the handover voucher information, if it determines that it is in the registered state, it does not need to process the handover voucher information; if it determines that it is in the unregistered state, it can request the registration function according to the handover voucher information. The entity sends a registration request message. For details, see the description below.

(3) The first terminal device can send the first registration request message to the third terminal device through the short-range communication connection in various ways. For example, if the near field communication connection is an NFC connection, the first registration request message sent by the first terminal device to the third terminal device may be an NDEF message. The payload of the NDEF message includes information in JSON format, and the information in JSON format includes the handover voucher. Information, optionally, may also include address information of the registered functional entity. See Table 11 for an example of the first registration request message.

Table 11: First registration request message example 1

For another example, if the near field communication connection is a WiFi connection, the first registration request message sent by the first terminal device to the third terminal device may be an HTTP message, and the request data of the HTTP message may include information in JSON format, and the information in JSON format may include The handover credential information may optionally also include address information of the registered functional entity. See Table 12 for another example of the first registration request message.

Table 12: First registration request message example 2

S903. After receiving the first registration request message, the third terminal device sends a second registration request message to the registration function entity. The second registration request message includes the handover credential information and the registration identification (such as local label) of the third terminal device; Correspondingly, the registration function entity may receive the second registration request message.

For example, the second registration request message may also include other possible information, such as the user ID of the first terminal device and the third The IP address of the terminal device is not specifically limited.

S904: After determining that the third terminal device is successfully registered based on the handover credential information, the registration function entity returns a first registration response message to the third terminal device. The first registration response message is used to indicate that the third terminal device is successfully registered.

For example, the registration function entity determines the successful registration of the third terminal device based on the handover credential information, and may refer to the previous description of the registration process.

Exemplarily, the registration function entity may also send the registration information of the third terminal device to the call function entity. The registration information of the third terminal device includes the local label of the third terminal device, and may also include the user ID of the first terminal device and The IP address of the third terminal device.

S905. The third terminal device sends a second registration response message to the first terminal device. The second registration response message is used to indicate that the third terminal device has been successfully registered.

S906. The first terminal device sends a transition request message to the third terminal device through a short-range communication connection. The transition request message includes handover instruction information. The handover instruction information instructs the third terminal device to perform a transfer between the third terminal device and the second terminal device. P media data transmission services between.

For example, the handover instruction information may include the user identification of the second terminal device and/or the identification of the session corresponding to the call service.

As a possible implementation, the handover instruction information may also include handover object information. There may be many ways for the first terminal device to determine the handover object. For example, the first terminal device may obtain the media capability information of the third terminal device. The media capability information is used to indicate the media data transmission service supported by the third terminal device, and then the first terminal device may obtain the media capability information of the third terminal device. The terminal device may determine the handover object based on the media capability information of the third terminal device. There may be multiple ways for the first terminal device to obtain the media capability information of the third terminal device. For example, the third terminal device may send the media capability information of the third terminal device to the first terminal device through the second registration response message.

S907: The third terminal device performs P media data transmission services according to the scene transition request message.

Here, before S907, the first terminal device can send the handover credential information to the third terminal device, and then the third terminal device can use the handover credential information to register with the registration function entity, and then after the registration is successful, the third terminal device P media data transmission services can be executed according to the transition request message.

S908: After determining that the third terminal device has started executing P media data transmission services, the first terminal device suspends or terminates execution of N media data transmission services.

It can be understood that in the above-described third embodiment, the first registration request message and the transition request message may be the same message. That is to say, after detecting the user's transition operation, the first terminal device may send a message to the third terminal device through a message. The three terminal devices send handover voucher information and handover instruction information.

Compared with the method in Embodiment 3 above, in Embodiment 2: in Embodiment 2, the third terminal device needs to request the credential information itself, that is to say, the third terminal device needs to use the user identification of the third terminal device to request the credential information. The registration function entity registers; in the third embodiment, the first terminal device can send the handover credential information to the third terminal device, and the third terminal device itself does not need to request the credential information. That is to say, the third terminal device can use the first The user identification of the terminal device is registered with the registration function entity. For example, in the third embodiment, the third terminal device does not need to install a SIM card (for example, the third terminal device can be a terminal device that does not support a SIM card, and a terminal device that does not support a SIM card does not have the ability to request credential information). Therefore, Using the method in Embodiment 3, the devices that accept the transition can be more diverse, and the transition solution has greater applicability.

The specific implementation of S907 and S908 in the above-mentioned Embodiment 3 will be described below with reference to specific examples (ie, Example 1 and Example 2).

Example 1

In Example 1, the first terminal device and the second terminal device may both be smartphones, the third terminal device may be a smart watch, and the call service between the user of the first terminal device and the user of the second terminal device is a video call. Services, for example, smart watches support audio data transmission services but do not support video data transmission services and DC data transmission services. Therefore, the first terminal device can transfer the audio data transmission service between the first terminal device and the second terminal device. to the third terminal device. In addition, Example 1 is described using "P=N" as an example, that is to say, the first terminal device transfers the audio data transmission service (called audio data transmission service) between the first terminal device and the second terminal device. 1) After transitioning to the third terminal device, the third terminal device can perform the audio data transmission service (called audio data transmission service 2) between the third terminal device and the second terminal device. The audio data transmission service 2 is used for Replace audio data transmission service1.

Figure 10 is a schematic flowchart corresponding to S907 and S908 in Embodiment 3 of the present application. Among them, S907 may include S9071 to S9075, and S908 may include S9081 and S9082.

S9071: After receiving the transition request message, the third terminal device sends a session establishment request message to the call function entity.

Exemplarily, the session establishment request message may include the user identification of the first terminal device and the call identification of the third terminal device. (Call-ID3), the local tag of the third terminal device (from-tag3), the identifier of the session corresponding to the call service (that is, the session between the first terminal device and the second terminal device) (such as Call-ID1, from -tag1 and to-tag2), the user identification of the second terminal device, and the media parameters of the third terminal device. Among them, the media parameters of the third terminal device may indicate the handover object, for example, the handover object is the audio data transmission service; for example, the media parameters of the third terminal device may also indicate other possible information, such as the third terminal device for media There are no specific restrictions on the data encoding method, sampling rate, etc. See Table 13 for an example session establishment request message.

Table 13: Example of session establishment request message

S9072: After receiving the session establishment request message, the call function entity sends a session modification request message to the second terminal device.

Here, the call function entity can learn that the session establishment request message is used to transfer the call service according to the session identifier in the session establishment request message, and then the call function entity can use the session identifier and/or the second terminal corresponding to the call service to user identification of the device), and sends a session modification request message to the second terminal device. For example, the session modification request message can be used to request the second terminal device to modify the address information of the audio channel from address information 1 (ie, the address information on the first terminal device side) to address information 2 (ie, the address information on the third terminal device side). ). It can be understood that since the call function entity sends a session modification request message to the second terminal device, the second terminal device does not perceive the third terminal device, or in other words, the second terminal device does not perceive that the call service is transmitted by the first terminal device. The terminal device transitions to a third terminal device.

For example, the call function entity may generate a session modification request message according to the identifier of the session corresponding to the call service that needs to be transferred. The session modification request message may include the user identification of the first terminal device, Call-ID1, from-tag1 and to-tag2, the user identification of the second terminal device, and the media parameters of the third terminal device. See Table 14 for an example session modification request message.

Table 14: Example of session modification request message

S9073. The second terminal device receives the session modification request message. If it determines to accept the session modification, it can send a session modification response message to the call function entity.

For example, the second terminal device can modify the address information of the audio channel from address information 1 (ie, the address information on the first terminal device side) to address information 2 (ie, the address on the third terminal device side) according to the session modification request message. information), and transmit audio data according to the modified address information of the audio channel. Optionally, the second terminal device may also determine whether to modify the encoding mode and sampling rate of the audio data of the third terminal device based on the encoding mode and sampling rate of the audio data carried by the third terminal device in the session modification request message, If the modification is determined, the session modification response message can carry the modified encoding method and sampling rate. If no modification is required, the session modification response message can carry the previous encoding method and sampling rate.

See Table 15 for an example of a session modification response message.

Table 15: Example of session modification response message

S9074: After receiving the session modification response message, the call function entity sends a session establishment response message to the third terminal device.

For example, after receiving the session modification response message, the call function entity may generate a session establishment response message according to the session modification response message, and send the session establishment response message to the third terminal device.

See Table 16 for an example of a session establishment response message.

Table 16: Example of session establishment response message

In this way, after receiving the session modification response message, the third terminal device can obtain the IP address and port number of the audio channel on the second terminal device side, and then the third terminal device can pass the communication between the third terminal device and the first terminal device. The audio channel transmits the audio data associated with the call service.

S9075, the third terminal device sends handover completion information to the first terminal device. The handover completion information is used to indicate that the third terminal device has Start executing P media data transmission services.

S9081: After determining that the third terminal device has started executing P media data transmission services, the first terminal device sends a session modification request message to the call function entity.

Here, there may be multiple ways for the first terminal device to determine that the third terminal device has started to perform P media data transmission services. For example, the first terminal device may receive handover completion information from the third terminal device, and then determine based on the handover completion information that the third terminal device has started executing P media data transmission services. For another example, the first terminal device detects M data transmission channels (corresponding to M media data transmission services respectively) between the first terminal device and the second terminal device. If the first terminal device passes N among them within a set time period, If the media data sent by the second terminal device is not received by the data transmission channels, it can be determined that the third terminal device has started to perform P media data transmission services; for example, the set time length may be predefined by the protocol.

For example, after the first terminal device determines that the third terminal device has started to perform P media data transmission services, it may suspend or terminate the execution of N media data transmission services replaced by the P media data transmission services. In Example 1, the N media data transmission services are audio data transmission services between the first terminal device and the second terminal device.

If the first terminal device determines to terminate the audio data transmission service between the first terminal device and the second terminal device, it may send a session modification request message to the call function entity. The session modification request message is used to request the termination of the audio data transmission service between the first terminal device and the second terminal device. In this case, the session modification request message does not carry relevant information of the audio data, so that the call function entity can Release or delete the address information of the audio channel on the first terminal device side according to the session modification request message, etc. See Table 17 for an example session modification request message.

If the first terminal device determines to suspend the execution of the audio data transmission service between the first terminal device and the second terminal device, it can suspend the transmission of audio data with the second terminal device through the audio channel without sending a session modification request to the call function entity. information.

Table 17: Example of session modification request message

S9082: The call function entity sends a session modification response message to the first terminal device.

Here, after the call function entity receives the session modification request message from the first terminal device, it can determine that the session is a session that has been transferred according to the session identifier carried in the session modification request message; further, the call function entity can determine according to the session modification request message. According to the content in the session modification request message, it can be determined that the session modification request message is used to request the release or deletion of the data transmission channel corresponding to the transitioned media data transmission service. Therefore, the call function entity can send a session modification response to the first terminal device. message without forwarding the session modification request message to the second terminal device.

See Table 18 for an example of a session modification response message.

Table 18: Example of session modification response message

Example 2

In Example 2, the first terminal device and the second terminal device may both be smartphones, the third terminal device may be a smart TV, and the call service between the user of the first terminal device and the user of the second terminal device is a video call. Services, for example, smart TVs support audio data transmission services, video data transmission services and DC data transmission services. Therefore, the first terminal device can transfer all data transmission services to the third terminal device. In addition, Example 2 is described using "P=N" as an example. That is to say, the first terminal device transfers the audio data transmission service 1 and the video data transmission service 1 between the first terminal device and the second terminal device. . After the DC data transmission service 1 is transferred to the third terminal device, the third terminal device can perform audio data transmission service 2, video data transmission service 2, and DC data transmission service 2 between the third terminal device and the second terminal device. . Among them, the audio data transmission service 2 is used to replace the audio data transmission service 1, the video data transmission service 2 is used to replace the video data transmission service 1, and the DC data transmission service 2 is used to replace the DC data transmission service 1.

Figure 11 is a schematic flowchart corresponding to S907 and S908 in Embodiment 3 of the present application. Among them, S907 may include S9071 to S9075, and S908 may include S9081 and S9082.

S9071: After receiving the transition request message, the third terminal device sends a session establishment request message to the call function entity.

For example, the session establishment request message may include the user ID of the first terminal device, the call ID (Call-ID3) of the third terminal device, the local tag (from-tag3) of the third terminal device, and the session corresponding to the call service. (ie, the session between the first terminal device and the second terminal device) (such as Call-ID1, from-tag1 and to-tag2), the user identification of the second terminal device, and the media parameters of the third terminal device. The media parameters of the third terminal device may indicate the handover objects. For example, the handover objects include audio data transmission services, video data transmission services and DC data transmission services; for example, the media parameters of the third terminal device may also indicate other possible Information, such as the encoding method and sampling rate of media data of the third terminal device, are not specifically limited. See Table 19 for an example session establishment request message.

Table 19: Example of session establishment request message

S9072: After receiving the session establishment request message, the call function entity sends a session modification request message to the second terminal device.

Here, the call function entity can learn that the session establishment request message is used to transfer the call service according to the session identifier in the session establishment request message, and then the call function entity can use the session identifier and/or the second terminal corresponding to the call service to user identification of the device), and sends a session modification request message to the second terminal device.

For example, the call function entity may generate a session modification request message according to the identifier of the session corresponding to the call service that needs to be transferred. The session modification request message may include the user identification of the first terminal device, Call-ID1, from-tag1 and to-tag2, the user identification of the second terminal device, and the media parameters of the third terminal device. See Table 20 for an example of a session modification request message.

Table 20: Example of session modification request message

S9073. The second terminal device receives the session modification request message. If it determines to accept the session modification, it can send a session modification response message to the call function entity.

See Table 21 for an example of a session modification response message.

Table 21: Example of session modification response message

S9074: After receiving the session modification response message, the call function entity sends a session establishment response message to the third terminal device.

For example, after receiving the session modification response message, the call function entity may generate a session establishment response message according to the session modification response message, and send the session establishment response message to the third terminal device.

See Table 22 for an example of a session establishment response message.

Table 22: Example of session establishment response message

In this way, after receiving the session modification response message, the third terminal device can obtain the IP address and port number of the audio channel, video channel and DC application channel on the second terminal device side, and then the third terminal device can obtain the IP address and port number of the audio channel, video channel and DC application channel through the third terminal device. The audio channel between the third terminal device and the first terminal device transmits the audio data associated with the call service, the video channel between the third terminal device and the first terminal device transmits the video data associated with the call service, and the third terminal device and the first terminal device transmit the video data associated with the call service through the audio channel between the third terminal device and the first terminal device. The DC application channel between terminal devices transmits DC data associated with call services.

S9075: The third terminal device sends handover completion information to the first terminal device. The handover completion information is used to indicate that the third terminal device has started executing P media data transmission services.

S9081: After determining that the third terminal device has started executing P media data transmission services, the first terminal device sends a session end request message to the call function entity.

For example, after the first terminal device determines that the third terminal device has started to perform P media data transmission services, it may suspend or terminate the execution of N media data transmission services replaced by the P media data transmission services. In Example 2, the N media data transmission services are audio data transmission services, video data transmission services and DC data transmission services between the first terminal device and the second terminal device.

If the first terminal device determines to terminate the audio data transmission service, video data transmission service and DC data transmission service between the first terminal device and the second terminal device, it may send a session end request message to the call function entity. The session modification request message is used to request the end of the session corresponding to the call service.

If the first terminal device determines to suspend the audio data transmission service, video data transmission service and DC data transmission service between the first terminal device and the second terminal device, it can suspend the transmission of audio data, Video data and DC data without sending a session end request message to the call function entity.

S9082: The call function entity sends a session end response message to the first terminal device.

Here, after the call function entity receives the session end request message from the first terminal device, it can determine that the session is a session that has been transferred based on the session identifier carried in the session end request message. Therefore, the call function entity can The first terminal device sends the session end response message without forwarding the session end request message to the second terminal device.

The above Example 1 and Example 2 are both described using "P=N" as an example. In other possible embodiments, P may also be greater than or less than N. For example, P=1, N=2, where the N media data transmission services include audio data transmission services and video data transmission services, the P media data transmission services are audio and video data transmission services, and the audio and video data transmission services are 2 Used to replace the audio data transmission service and the video data transmission service; in this case, the session establishment request message sent by the third terminal device may include the identifier of the audio and video data transmission service. Correspondingly, the call function entity receives the session establishment request After the message is sent, according to the identification of the audio and video data transmission service, it can be determined that the audio data transmission service 1 and the video data transmission service 1 need to be transitioned, and after the transition, they will be merged into one media data transmission service (i.e., the audio and video data transmission service) ; Furthermore, the call function entity may send a session modification request message to the second terminal device to request the second terminal device to establish a data transmission channel corresponding to the audio and video data transmission service. For specific implementation, please refer to Example 1 and Example 2.

The above Example 1 and Example 2 are described by taking Embodiment 3 as an example. "The third terminal device performs P media data transmission services according to the transition request message" in Embodiment 1 and 2 and "The third terminal device performs P media data transmission services according to the transition request message" in Embodiment 3. "The difference is that in Embodiment 1 and Embodiment 2, the third terminal device can use the user ID of the third terminal device to register, and then the third terminal device can also use the user ID of the third terminal device to initiate a session establishment request message. , and in Embodiment 3, the third terminal device uses the user ID of the first terminal device to initiate a session establishment request message; for other content other than this difference, Embodiment 1 and Embodiment 2 can refer to Embodiment 3. The implementation of "the first terminal device suspends execution or terminates the execution of the N media data transmission services" in Embodiment 1 and Embodiment 2 can refer to "the first terminal device suspends execution or terminates the execution of the N media data transmission services" in Embodiment 3. "Data transmission business" description.

Regarding the above-mentioned Embodiment 1 to Embodiment 3, it can be understood that:

(1) Regarding the above-mentioned Embodiment 1 to Embodiment 3, when the third terminal device starts to perform P media data transmission services, the first terminal device can send control information to the third terminal device, and the control information is used to control P media Data transmission business. For example, the control information may be used to control the transmission and/or presentation of P media data transmission services.

For example, if the P media data transmission services include audio data transmission services and video data transmission services, the control information can be used to control the volume at which the third terminal device plays audio data as sound, the window size for displaying video data as animation, and /or window position. For example, taking volume control as an example, see Figure 12, which is a schematic diagram of the interface of the first terminal device. The interface of the first terminal device may include a "volume +" control and a "volume -" control. Then: when the first terminal device When the user of the terminal device clicks the "Volume +" control on the interface of the first terminal device, the first terminal device can send control information 1 to the third terminal device. Correspondingly, the third terminal device can increase the volume according to the control information 1; When the user of the first terminal device clicks the "Volume -" control on the interface of the first terminal device, the first terminal device can send control information 2 to the third terminal device. Correspondingly, the third terminal device can control information 2 according to the control information 2. lower the volume.

(2) In the above Embodiment 1 to Embodiment 3, the second terminal device allows the third terminal device to perform P media data transmission services as an example. In other possible embodiments, the second terminal device may also The third terminal device is not allowed to perform P media data transmission services. In this case, the call service can be maintained between the first terminal device and the second terminal device (that is, the transition fails). For example, in the above example 1 or example 2, after receiving the session modification request message from the call function entity, the second terminal device determines that it does not accept the session modification, and sends a session modification failure message to the call function entity; accordingly, the call function entity After receiving the session modification failure message, the third terminal device may send a session establishment failure message to the third terminal device, and after receiving the session establishment failure message, the third terminal device may send a handover failure message to the first terminal device; furthermore, the first terminal device The call service can be maintained between the device and the second terminal device.

Among them, the second terminal device can determine whether to allow the third terminal device to perform P media data transmission services in a variety of ways. For example, the second terminal device can determine based on the encoding method and/or sampling rate of the media data of the third terminal device. Determine whether the third terminal device is allowed to perform P media data transmission services. Specifically, if the encoding method and/or sampling rate of the media data of the second terminal device and the third terminal device are consistent, the third terminal device may be allowed to perform P media data transmission services, otherwise (for example, the second terminal device is configured for The encoding mode of video data is mode 1, and the encoding mode of the video data of the third terminal device is mode 2, but the second terminal device does not support mode 2), and the third terminal device may not be allowed to perform P media data transmission services.

(3) In the above-mentioned Embodiment 1 to Embodiment 3, for the call service between the user of the first terminal device and the user of the second terminal device, the first terminal device may be the calling party of the call service, or the first terminal The device can also be the called party of the call service. That is to say, the transition solution in the embodiment of the present application may be applicable to the calling party of the call service, or may also be applied to the called party of the call service.

(4) The above focuses on the differences between different embodiments in Embodiment 1 to 3. Except for other differences, Embodiments 1 to 3 can be referred to each other; in addition, in the same embodiment, , different implementations or different examples can also be cross-referenced.

The above mainly introduces the solutions provided by the embodiments of the present application from the perspective of interaction between devices. It can be understood that, in order to implement the above functions, the device may include corresponding hardware structures and/or software modules that perform each function. Those skilled in the art should easily realize that, with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Embodiments of the present application can divide the device into functional modules or units according to the above method examples. For example, each functional module or unit can be divided corresponding to each function, or two or more functions can be integrated into one module or unit. . The above-mentioned integrated modules or units can be implemented in the form of hardware or software functional modules or units.

In the case of using integrated units, Figure 13 shows a possible exemplary block diagram of the device involved in the embodiment of the present application. As shown in Figure 13, the device 1300 may include: a processing module 1302 and a communication module 1303. The processing module 1302 is used to control and manage the actions of the device 1300 . The communication module 1303 is used to support communication between the device 1300 and other devices. Optionally, the communication module 1303 is also called a transceiver module and may include a receiving module and/or a sending module, respectively configured to perform receiving and sending operations. The device 1300 may also include a storage module 1301 for storing program codes and/or data of the device 1300 .

(1) The device 1300 may be the first terminal device in the above embodiment. The processing module 1302 can support the device 1300 to perform the actions of the first terminal device in each of the above method examples. Alternatively, the processing module 1302 mainly performs actions related to processing of the first terminal device in the above method examples or operations other than transceiving. The communication module 1303 can support communication between the device 1300 and other entities, such as performing the above method examples. Operations related to sending and receiving of the first terminal device. For example, taking FIG. 9 as an example, the processing module 1302 can be used to execute S901 and S908 in FIG. 9 , and the communication module 1303 can be used to execute S902, S905, and S906 in FIG. 9 . Similarly, the processing module 1302 can also be used for processing-related operations of the first terminal device in other flowcharts (such as Figures 4 to 8, 10, and 11), and the communication module 1303 can also be used in other flowcharts (such as Transmitting and receiving related operations of the first terminal device in Figures 4 to 8, Figure 10, and Figure 11).

Specifically, in one embodiment, the processing module 1302 is configured to: perform M media data transmission services between the first terminal device and the second terminal device; the communication module 1303 is configured to: transmit data to the first terminal device through a short distance communication connection. The third terminal device sends handover instruction information, and the handover instruction information instructs the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device, and the P media data The transmission service is used to replace the N media data transmission services among the M media data transmission services; and, the processing module 1302 is also used to: determine that the third terminal device has started to execute the P media data transmission services. , suspend the execution or terminate the execution of the N media data transmission services; wherein each media data transmission service is used to transmit and/or present the communication between the user of the first terminal device and the user of the second terminal device. Media data associated with the call service; N is less than or equal to M, and P is greater than or equal to or less than N.

(2) The device 1300 may be the third terminal device in the above embodiment. The processing module 1302 can support the device 1300 to perform the actions of the third terminal device in the above method examples. Alternatively, the processing module 1302 mainly performs actions related to processing of the third terminal device in the above method examples or operations other than transceiving. The communication module 1303 can support communication between the device 1300 and other entities, such as performing the above method examples. Operations related to sending and receiving of the third terminal device. For example, taking FIG. 9 as an example, the processing module 1302 can be used to execute S907 in FIG. 9 , and the communication module 1303 can be used to execute S902, S903, S904, S905, and S906 in FIG. 9 . Similarly, the processing module 1302 can also be used for processing-related operations of the third terminal device in other flowcharts (as shown in Figures 8, 10, and 11), and the communication module 1303 can also be used in other flowcharts (as shown in Figures 8, 10, and 11). Transmitting and receiving related operations of the third terminal device in Figure 10 and Figure 11).

Specifically, in one embodiment, the communication module 1303 is configured to: receive handover instruction information from the first terminal device through a short-range communication connection, where the handover instruction information instructs the third terminal device to execute the operation of the third terminal device. P media data transmission services between the first terminal device and the second terminal device. The P media data transmission services are used to replace the N media data transmission services between the first terminal device and the second terminal device. ; The processing module 1302 is configured to: execute P media data transmission services between the third terminal device and the second terminal device according to the handover instruction information; wherein each media data transmission service is used to transmit and /Or present media data associated with the call service between the user of the first terminal device and the user of the second terminal device; N is less than or equal to M, and P is greater than or equal to or less than N.

The division of modules in the above device is only a division of logical functions. In actual implementation, it can be fully or partially integrated into a physical entity, or it can also be physically separated. And the modules in the device can all be implemented in the form of software calling through processing elements; they can also all be implemented in the form of hardware; some modules can also be implemented in the form of software calling through processing elements, and some modules can be implemented in the form of hardware. For example, each module can be a separate processing element, or can be integrated into a chip of the device. In addition, it can also be implemented as The form of the program is stored in the memory, and is called by a certain processing element of the device to execute the function of the module. In addition, all or part of these modules can be integrated together or implemented independently. The processing element described here can also be a processor, which can be an integrated circuit with signal processing capabilities. During the implementation process, each step of the above method or each of the above modules can be implemented through an integrated logic circuit of hardware in the processor element or implemented in the form of software calling through the processing element.

In one example, the module in any of the above devices may be one or more integrated circuits configured to implement the above method, such as: one or more application specific integrated circuits (Application Specific Integrated Circuit, ASIC), or one or Multiple microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the module in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general central processing unit (central processing unit, CPU), or other processors that can call programs. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above module for receiving is an interface circuit of the device and is used to receive signals from other devices. For example, when the device is implemented as a chip, the receiving module is an interface circuit used by the chip to receive signals from other chips or devices. The above module used for sending is an interface circuit of the device and is used to send signals to other devices. For example, when the device is implemented as a chip, the sending module is an interface circuit used by the chip to send signals to other chips or devices.

Refer to Figure 14, which is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device can be applied in the communication system shown in Figure 1 and is used to implement the first terminal device or the third terminal in the above embodiment. Operation of the equipment. As shown in Figure 14, the terminal device includes: an antenna 1410, a radio frequency part 1420, and a signal processing part 1430. The antenna 1410 is connected to the radio frequency part 1420. In the downlink direction, the radio frequency part 1420 receives the information sent by the access network device through the antenna 1410, and sends the information sent by the access network device to the signal processing part 1430 for processing. In the uplink direction, the signal processing part 1430 processes the information of the terminal equipment and sends it to the radio frequency part 1420. The radio frequency part 1420 processes the information of the terminal equipment and then sends it to the access network equipment through the antenna 1410.

The signal processing part 1430 may include a modulation and demodulation subsystem for processing each communication protocol layer of data; it may also include a central processing subsystem for processing the operating system and application layer of the terminal device; in addition, it may It includes other subsystems, such as multimedia subsystem, peripheral subsystem, etc. The multimedia subsystem is used to control the camera, screen display, etc. of the terminal device, and the peripheral subsystem is used to realize the connection with other devices. The modem subsystem can be a separately configured chip.

The modem subsystem may include one or more processing elements 1431, including, for example, a host CPU and other integrated circuits. In addition, the modem subsystem may also include a storage element 1432 and an interface circuit 1433. The storage element 1432 is used to store data and programs, but the program used to perform the method performed by the terminal device in the above method may not be stored in the storage element 1432, but is stored in a memory outside the modem subsystem. The modem subsystem is loaded and used when used. Interface circuit 1433 is used to communicate with other subsystems.

The modulation and demodulation subsystem can be implemented by a chip, which includes at least one processing element and an interface circuit, wherein the processing element is used to perform various steps of any method performed by the above terminal equipment, and the interface circuit is used to communicate with other devices. In one implementation, the unit for the terminal device to implement each step in the above method can be implemented in the form of a processing element scheduler. For example, the device for the terminal device includes a processing element and a storage element, and the processing element calls a program stored in the storage element to Execute the method executed by the terminal device in the above method embodiment. The storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element.

In another implementation, the program for executing the method performed by the terminal device in the above method may be in a storage element on a different chip from the processing element, that is, an off-chip storage element. At this time, the processing element calls from the off-chip storage element or loads the program on the on-chip storage element to call and execute the method executed by the terminal device in the above method embodiment.

In yet another implementation, the unit of the terminal device that implements each step in the above method may be configured as one or more processing elements. These processing elements are provided on the modulation and demodulation subsystem. The processing elements here may be integrated circuits. For example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

The units of the terminal device that implement each step in the above method can be integrated together and implemented in the form of a SOC. The SOC chip is used to implement the above method. The chip can integrate at least one processing element and a storage element, and the processing element calls the stored program of the storage element to implement the above method executed by the terminal device; or, the chip can integrate at least one integrated circuit to implement the above terminal device. The method of device execution; or, the above implementation methods can be combined, and the functions of some units are realized in the form of processing components calling programs, and the functions of some units are realized in the form of integrated circuits.

It can be seen that the above device for terminal equipment may include at least one processing element and an interface circuit, wherein at least one processing element is used The method is executed by any terminal device provided in the above method embodiments. The processing element can execute part or all of the steps executed by the terminal device in the first way: that is, by calling the program stored in the storage element; or it can also use the second way: that is, by combining the instructions with the integrated logic circuit of the hardware in the processor element. method to perform part or all of the steps performed by the terminal device; of course, the first method and the second method may also be combined to perform part or all of the steps performed by the terminal device.

The processing elements here are the same as described above and can be implemented by a processor. The functions of the processing elements can be the same as the functions of the processing unit described in FIG. 13 . Exemplarily, the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or one or more microprocessors DSP , or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. The storage element can be implemented by a memory, and the function of the storage element can be the same as the function of the storage unit described in FIG. 13 . The storage element can be one memory or a collective name for multiple memories.

The terminal device shown in Figure 14 can implement various processes related to the terminal device in the above method embodiment. The operations and/or functions of each module in the terminal device shown in Figure 14 are respectively intended to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiments. To avoid repetition, the detailed description is appropriately omitted here.

The terms "system" and "network" in the embodiments of this application may be used interchangeably. "And/or" describes the relationship between associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist simultaneously, and B alone exists, where A, B can be singular or plural. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, "at least one of A, B, and C" includes A, B, C, AB, AC, BC, or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the order, timing, priority or importance of multiple objects. degree.

Those skilled in the art will understand that embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. Each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (38)

A communication method, characterized in that the method is applied to a first terminal device or a module in the first terminal device, and the method includes: Execute M media data transmission services between the first terminal device and the second terminal device; Handover instruction information is sent to the third terminal device through the short-range communication connection, and the handover instruction information instructs the third terminal device to perform P media data transmission services between the third terminal device and the second terminal device. , the P media data transmission services are used to replace the N media data transmission services in the M media data transmission services; After determining that the third terminal device has started executing the P media data transmission services, suspend or terminate the execution of the N media data transmission services; Wherein, each media data transmission service is used to transmit and/or present media data associated with the call service between the user of the first terminal device and the user of the second terminal device; N is less than or equal to M, and P is greater than Or equal to or less than N. The method of claim 1, further comprising: Handover voucher information is sent to the third terminal device through the short-range communication connection, and the handover voucher information indicates that the control function entity of the call service allows the third terminal device to take over the execution of media data from the second terminal device. transmission business. The method of claim 2, further comprising: Send handover credential request information to the control function entity, where the handover credential request information includes the information of the user of the first terminal device and the device identification of the third terminal device, and the information of the user of the first terminal device and the device identification of the third terminal device for generating the handover voucher information; The handover credential information is received from the control function entity. The method of claim 3, further comprising: Receive a short-range broadcast message from the third terminal device, where the short-range broadcast message includes a short-range broadcast identifier of the third terminal device; Determine the device identifier of the third terminal device according to the short-range broadcast identifier of the third terminal device. The method according to any one of claims 2 to 4, characterized in that the method further includes: The address information of the control function entity is sent to the third terminal device through the short-range communication connection. The method according to any one of claims 1 to 5, characterized in that the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services. The method according to claim 6, characterized in that the handover object information includes identifiers of the N media data transmission services. The method according to claim 6 or 7, characterized in that, the method further includes: Receive media capability information from the third terminal device through the short-range communication connection, where the media capability information is used to indicate the media data transmission service supported by the third terminal device; The handover object information is determined based on the media capability information. The method according to any one of claims 1 to 8, characterized in that the handover instruction information includes the user identification of the second terminal device and/or the first terminal device associated with the call service and the An identification of the session between the second terminal devices. The method according to any one of claims 1 to 9, characterized in that determining that the third terminal device has started executing the P media data transmission services includes: Receive handover completion information from the third terminal device, where the handover completion information is used to indicate that the third terminal device has started executing the P media data transmission services. The method according to any one of claims 1 to 10, characterized in that the method further includes: Control information is sent to the third terminal device through the short-range communication connection, and the control information is used to control the P media data transmission services. A communication method, characterized in that the method is applied to a third terminal device or a module in the third terminal device, and the method includes: Handover instruction information is received from the first terminal device through the near field communication connection, and the handover instruction information instructs the third terminal device to perform P media data transmissions between the third terminal device and the second terminal device. Service, the P media data transmission services are used to replace the N media data transmission services between the first terminal device and the second terminal device; According to the handover instruction information, execute P media data transmission services between the third terminal device and the second terminal device; Wherein, each media data transmission service is used to transmit and/or present media data associated with the call service between the user of the first terminal device and the user of the second terminal device; N is less than or equal to M, and P is greater than Or equal to or less than N. The method of claim 12, further comprising: Receive handover voucher information sent from the first terminal device through the short-range communication connection; Send the handover credential information to the control function entity, where the handover credential information indicates that the control function entity of the call service allows the third terminal device to perform the communication between the third terminal device and the second terminal device. P media data transmission services. The method of claim 13, further comprising: Address information of the control function entity of the first terminal device is received via the near field communication connection. The method according to any one of claims 12 to 14, wherein the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services. The method according to claim 15, characterized in that the handover object information includes identifiers of the N media data transmission services. The method according to claim 15 or 16, characterized in that, the method further includes: Media capability information is sent to the first terminal device through the short-range communication connection, and the media capability information is used to indicate the media data transmission service supported by the third terminal device; wherein the media capability information is used to determine The handover object information. The method according to any one of claims 12 to 17, characterized in that the handover instruction information includes the user identification of the second terminal device and/or the first terminal device associated with the call service and the An identification of the session between the second terminal devices. The method according to any one of claims 12 to 18, characterized in that the method further includes: Handover completion information is sent to the first terminal device through the short-range communication connection, where the handover completion information is used to indicate that the third terminal device has started executing the P media data transmission services. The method according to any one of claims 12 to 19, characterized in that the method further includes: Control information from the first terminal device is received through the short-range communication connection, and the control information is used to control the P media data transmission services. A communication method, characterized in that the method includes: The first terminal device performs M media data transmission services between the first terminal device and the second terminal device; and sends handover instruction information to the third terminal device through a short-range communication connection, where the handover instruction information indicates that the The third terminal device performs P media data transmission services between the third terminal device and the second terminal device, and the P media data transmission services are used to replace the M media data transmission services. N media data transmission services; The third terminal device receives the handover instruction information from the first terminal device, and executes P pieces of media data between the third terminal device and the second terminal device according to the handover instruction information. Transmission business; After the first terminal device determines that the third terminal device has started executing the P media data transmission services, it suspends or terminates the execution of the N media data transmission services; Wherein, each media data transmission service is used to transmit and/or present media data associated with the call service between the user of the first terminal device and the user of the second terminal device; N is less than or equal to M, and P is greater than Or equal to or less than N. The method according to claim 21, characterized in that, the method further includes: The first terminal device sends handover voucher information to the third terminal device through the short-range communication connection; After receiving the handover voucher information, the third terminal device sends the handover voucher information to the control function entity of the call service, and the handover voucher information instructs the control function entity to allow the third terminal device to take over The second terminal device performs media data transmission service. The method of claim 22, further comprising: The first terminal device sends handover credential request information to the control function entity. The handover credential request information includes the user information of the first terminal device and the device identification of the third terminal device. The information of the user of the terminal device and the device identification of the third terminal device are used to generate the handover voucher information; The first terminal device receives the handover credential information from the control function entity. The method of claim 23, further comprising: The first terminal device receives a short range broadcast message from the third terminal device, the short range broadcast message includes the third Close range broadcast identification for three terminal devices; The first terminal device determines the device identification of the third terminal device based on the short-range broadcast identification of the third terminal device. The method according to any one of claims 22 to 24, characterized in that the method further includes: The first terminal device sends the address information of the control function entity to the third terminal device through the short-range communication connection; The third terminal device sends the handover voucher information to the control function entity of the call service according to the address information of the control function entity. The method according to any one of claims 21 to 25, wherein the handover instruction information includes handover object information, and the handover object information is used to indicate the N media data transmission services. The method according to claim 26, characterized in that the handover object information includes identifiers of the N media data transmission services. The method according to claim 26 or 27, characterized in that, the method further includes: The third terminal device sends media capability information of the third terminal device to the first terminal device through the short-range communication connection, where the media capability information is used to indicate media data supported by the third terminal device. Transmission business; After receiving the media capability information of the third terminal device, the first terminal device determines the handover object information based on the media capability information. The method according to any one of claims 21 to 28, characterized in that the handover instruction information includes the user identification of the second terminal device and/or the first terminal device associated with the call service and the An identification of the session between the second terminal devices. The method according to any one of claims 21 to 29, characterized in that the method further includes: The third terminal device sends handover completion information to the first terminal device through the near field communication connection. The handover completion information is used to indicate that the third terminal device has started to perform the P media data transmissions. business; The first terminal device determines that the third terminal device has started executing the P media data transmission services according to the handover completion information. The method according to any one of claims 21 to 30, characterized in that the method further includes: The first terminal device sends control information to the third terminal device through the short-range communication connection; The third terminal device receives the control information, and the control information is used to control the P media data transmission services. A communication device, characterized by comprising a module for executing the method according to any one of claims 1 to 11. A communication device, characterized by comprising a module for executing the method according to any one of claims 12 to 20. A communication device, characterized in that it includes a processor, the processor is coupled to a memory, and a computer program is stored in the memory; the processor is used to call the computer program in the memory, so that the communication device executes The method according to any one of claims 1 to 11. A communication device, characterized in that it includes a processor, the processor is coupled to a memory, and a computer program is stored in the memory; the processor is used to call the computer program in the memory, so that the communication device executes The method of any one of claims 12 to 20. A communication system, characterized in that the communication system includes the communication device according to claim 32 or 34 and the communication device according to claim 33 or 35. A computer-readable storage medium, characterized in that a computer program or instructions are stored in the storage medium. When the computer program or instructions are executed by a computer, the method of any one of claims 1 to 11 is implemented. Method, or a method as claimed in any one of claims 12 to 20. A computer program product, characterized in that, when a computer reads and executes the computer program product, it causes the computer to perform the method of any one of claims 1 to 11, or the method of any one of claims 12 to 20. method described in the item.