CN101383827B - Method, apparatus and system for media transferring - Google Patents

Abstract

The embodiment of the present invention discloses a method, device and system for transferring media. The method includes: receiving a transfer request message sent by a first terminal, and the transfer request message requests transfer of the conversation between the first terminal and the peer terminal. transfer the media in the media to the second terminal, and include an instruction to change the media in the holding state before the transfer to the continuous transmission state after the transfer; establish a session with the second terminal; transfer the media to the second terminal, so The above media includes media that was on hold prior to transfer. In the embodiment of the present invention, by including an instruction in the message to change the media in the holding state before the transfer to the continuous transmission state after the transfer, the media in the holding state can also be transferred between different terminal devices and continue to be transmitted.

Description

A method, device and system for transferring media

technical field

The present invention relates to the field of communication technology, in particular to a method, device and system for transferring media.

Background technique

When the session of the Internet Protocol Multimedia Subsystem (IMS) is transferred between different terminal devices, in order to provide a good user experience, it is required that the session media stream (media) should also be kept continuous during the transfer process.

Referring to Fig. 1, Fig. 1 is a schematic diagram of transfer of session media between different terminal devices, 101 terminal-1 and 103 peer terminals conduct a session; when 101 terminal-1 needs to transfer the session to 104 terminal-2, 101 terminal-1 Send a transfer message (REFER) to 102 Service Centralization and Continuity Application Server (SCC AS) through the call session control function entity (Call Session Control Function, CSCF), requesting transfer of media to 104 terminal-2, 102SCC The AS sends a session establishment request message (INVITE) to 104 Terminal-2, and sends update (re-INVITE) information to 101 Terminal-1 and 103 peer terminals after receiving the response information from 104 Terminal-2.

During the research and practice of the prior art, the inventors of the present invention have found that the prior art has the following problems:

The existing technology only has the process of transferring the media in the normal receiving/sending state between different terminal devices, but does not provide the process of transferring the media in the hold state between different terminal devices. (sendonly), only receive (recvonly), not send and not receive (inactive), for example, A answers the call of C during the call with B, and the call between A and B is on hold.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method, device and system for transferring media, so that the media in the holding state can also be transferred between different terminal devices and continue to be transmitted.

In order to solve the above technical problems, the embodiments provided by the present invention are achieved through the following technical solutions:

A method for transferring media: receiving a transfer request message sent by a first terminal, the transfer request message requesting transfer of media in a conversation between the first terminal and a peer terminal to a second terminal, and including The medium in the holding state is changed to an indication of the continuing transmission state; according to the transfer request message, a session with the second terminal is established; the media is transferred to the second terminal, and the media includes the holding state before the transfer After transferring the media to the second terminal, instruct the peer terminal having a conversation with the first terminal to continue to transmit the media to the second terminal.

A method for transferring media: sending a transfer request message to the network side, the transfer request message requesting transfer of the media in the dialogue with the peer terminal to another terminal, and including changing the media that was in the hold state before the transfer to continue after the transfer An indication of the transmission state, so that the network side establishes a session with the other terminal according to the transfer request message, transfers the media to the other terminal, and the media includes the media in the holding state before the transfer, and After transferring the media to the other terminal, instruct the peer terminal to continue to transmit media to the other terminal; after sending the transfer request message, stop transmitting the transfer request message to the peer terminal to request transfer media.

A terminal capable of transferring media, including: a sending unit, configured to send a transfer request message to the network side, the transfer request message requesting transfer of the media in the dialogue with the opposite terminal terminal to another terminal, and including the transferred The indication that the media in the holding state changes to the continuing transmission state; the transmission unit is used to receive and/or send the media; the control unit is used to control the transmission unit to stop receiving and/or sending the transfer request message after the sending unit sends the transfer request message The sending unit requests the transferred media.

A server capable of transferring media, including:

The transfer request receiving unit is configured to receive a transfer request message sent by the first terminal, the transfer request message requests to transfer the media in the conversation between the first terminal and the peer terminal to the second terminal, and includes the An indication that the medium in the holding state is changed to a continuing transmission state; the session establishment unit is used to establish a session with the second terminal according to the transfer request message received by the transfer request unit; the transfer unit is used to establish a session with the session establishment unit After the session with the second terminal, transfer the media to the second terminal, the media includes the media in the hold state before the transfer; an indication unit is used to indicate the opposite terminal in the session with the first terminal Continue to transmit media to the second terminal.

A communication system capable of transferring media, comprising:

The first terminal is configured to send a transfer request message to the network side, the transfer request message requests to transfer the media in the conversation between itself and the peer terminal to the second terminal, and includes the change of the media that was in the hold state before the transfer after the transfer It is an instruction to continue the transmission state; the second terminal is used to receive the media transferred from the first terminal, and the media includes the media in the holding state before the transfer; the network side is used to receive the transfer request sent by the first terminal message, the transfer request message requests to transfer the media in the conversation between the first terminal and the peer terminal to the second terminal, and after establishing a session with the second terminal according to the received transfer request message sent by the first terminal, transferring the media to the second terminal, the media including the media in the holding state before the transfer, and after transferring the media to the second terminal, instructing the peer terminal in conversation with the first terminal to send the media to the The second terminal continues to transmit the media; the peer terminal is configured to continue to transmit to the second terminal the media that is in a holding state before the transfer and is requested to be transferred by the first terminal.

It can be seen from the above technical solution that the embodiment of the present invention enables the media in the held state to be transferred between different terminal devices by including an instruction to change the media in the held state before the transfer to the continued transmission state after the transfer is included in the message and continue the transfer.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of transfer of session media between different terminal devices in the prior art;

Fig. 2 is a schematic flow chart of the method of Embodiment 1 of the present invention;

Fig. 3 is a schematic flow chart of the method of Embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a server according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a system according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment 1, refer to FIG. 2 for detailed description, and FIG. 2 is a schematic flow chart of the method of this embodiment.

Step 301: Receive a transfer request message sent by the first terminal, the transfer request message requests to transfer the media in the conversation between the first terminal and the peer terminal to the second terminal, and includes the information that will be in the hold state before the transfer after the transfer. An indication that the medium has changed to a continuing transfer state.

The transfer request message sent by the first terminal includes the requested behavior (transfer media to another device), media transfer target device, media information to be transferred (such as media type, media-associated dialogue), etc. Instructions to change the media in the hold state before the transfer to the continuing transmission state, so as to put forward the requirement that the media in the holding state before the transfer need to continue to be transmitted after the transfer of the media.

The hold state of the media includes sendonly, recvonly, and inactive, and the resume state includes sendonly, recvonly, send/ Receive (sendrecv) status.

The media requested by the first terminal to be transferred may be part or all of the media in the session, which does not affect the implementation of the embodiments of the present invention.

The first terminal and the second terminal may belong to the same user or different users, which does not affect the implementation of the embodiments of the present invention.

Step 302: Establish a session with the second terminal according to the transfer request message.

Before establishing a session with the second terminal, the network side may obtain capability information of the second terminal, such as supported media types, encoding methods, etc., and then send a request message for establishing a session to the second terminal, and the request message Contains new relevant parameters (such as media type, encoding method, etc.) of the media requested by the first terminal to be transferred in step 301. This parameter is suggested according to the acquired capabilities of the second terminal device; the request message may also include transferred media An indication of the continuation of transmission status, to request the second terminal to continue to transmit media.

Step 303: Transfer the media to the second terminal, where the media includes the media in a holding state before the transfer.

The network side may first receive the response message from the second terminal, and then transfer the media to the second terminal. Receiving the response message from the second terminal means that the second terminal has confirmed the new relevant parameters of the transferred media in step 302, and the second terminal can receive the media, then transfer the media to the second terminal, the Media includes media on hold prior to transfer.

The media requested by the first terminal to be transferred may be part or all of the media in the session with the remote terminal. When the media requested to be transferred by the first terminal is part of the media in the session, an update message may be sent to the first terminal, and the update message may include relevant parameters of the transferred media confirmed by the second terminal, and instruct the first terminal to stop transmission (send /receive) the transferred out media. When the media requested by the first terminal to be transferred is all the media of the session, that is, after the transfer, no first terminal will leave the media in the session with the opposite terminal in the first terminal, and the network side will send a session release message to the first terminal to release the media associated with the peer terminal. A session between the first terminals.

The network side may also send an update message to the peer terminal, which may include relevant parameters of the transferred media confirmed by the second terminal, indicating that the peer terminal continues to transmit the transferred media after the transfer; An indication that the medium in the hold state is changed to the state of continuous transmission, so as to require the peer terminal to change the medium in the state of hold before the transfer to the state of continuous transmission after the transfer.

In the case of sending an update message to the first terminal, the first terminal and the peer terminal may be updated at the same time, or a certain terminal may be updated first, without affecting the implementation of the embodiments of the present invention.

In the embodiment of the present invention, after the transfer, the media in the hold state before the transfer is changed to the continuous transmission state after the transfer, so that the media in the hold state before the transfer can also be transferred between different terminal devices and continue to be transmitted.

Embodiment 2 below will describe each step of media transfer in detail with reference to FIG. 3 . FIG. 3 is a schematic flowchart of the method in Embodiment 2 of the present invention, and the network side uses SCCAS as the specific operating device.

Embodiment two,

Step 401: UE-1 decides to transfer the media in the session with the peer UE to UE-2, including the media in the hold state.

The media to be transferred may be one or more media, and may be part or all of the media in the session, which does not affect the implementation of the embodiments of the present invention.

Step 402: UE-1 sends a transfer request message (REFER) to the SCC AS through the CSCF, requesting that the media be transferred to UE-2, and the transfer request message includes an instruction to change the media that was in the holding state before the transfer to the continuing transmission state after the transfer.

UE-1 can send a transfer request message to the SCC AS through the CSCF. CSCF provides the core IMS session control function in the IMS network. According to its position and function, it can be divided into proxy call session control function entity (P-CSCF), serving call session control function entity (S-CSCF), inquiry call session control function entity Functional entity (I-CSCF):

■P-CSCF (Proxy CSCF) is the first connection point with users in IMS, providing proxy (Proxy) function, that is, receiving and forwarding service requests; P-CSCF can also provide user agent (UA) function, that is, in case of exception In case of interruption and independent generation of SIP session.

■S-CSCF (Serving CSCF) is in the core control position in the IMS core network. It is responsible for UE registration authentication and session control, and performs basic session routing functions for calling and called IMS users. The contracted IMS trigger rule triggers value-added service routing to AS and service control interaction when the conditions are met.

■I-CSCF (Interrogating CSCF) is similar to the gateway node of IMS, providing user services in this domain

Node allocation, routing query and IMS inter-domain topology hiding functions.

The transfer request message sent by UE-1 to SCC AS includes the requested behavior (transfer media to UE-2), media transfer target device, media information to be transferred (such as media type, media-associated dialogue), etc. Contains instructions to change the media that was in the holding state before the transfer to the continuing transmission state after the transfer, so as to propose the requirement to continue to transmit the media that was in the holding state before the transfer after the media is transferred to UE-2. The media can be one or more, It may be part or all of the media in the session, which does not affect the implementation of the embodiments of the present invention.

After the transfer, the indication that the media in the holding state before the transfer is changed to the continuing transmission state can be realized by setting the "a=" attribute of the corresponding media in the message body of the Session Description Protocol (Session Description Protocol, SDP), or it can also be Whether it is a Session Initiation Protocol (SIP) message or other message formats does not affect the implementation of the embodiment of the present invention.

In the IMS system, the SDP is carried by the SIP signaling as a message body to control the establishment of the IMS session media stream bearer. IMS uses SIP signaling as call control signaling. SIP is an IMS control layer protocol. It is one of the multimedia communication system framework protocols formulated by IETF. It is an application layer protocol used to establish, change or end multimedia sessions. It cooperates with RTP/RTCP, SDP, RTSP, DNS and other protocols to complete Session establishment and media negotiation in IMS; once the session is established, the media stream will be directly transmitted in the bearer layer using the RTP protocol, and multiple media can be flexibly exchanged in one session.

Change the medium that is in the hold state before the transfer to the resume state after the transfer, so that the media that is in the hold state before the transfer can continue to be transmitted after the transfer.

The hold state of the media includes sendonly, recvonly, inactive, and the resume state includes sendonly, recvonly, send/ Receive (sendrecv) state, the media that is in the sendonly, recvonly, or inactive state before the transfer will be changed accordingly after the transfer. The specific change rules can be set in the following table:

State parameter before transfer State parameter after transfer a=inactive (do not send or receive) a=sendonly (send only)

a=inactive (do not send or receive) a=recvonly (receive only) a=inactive (do not send or receive) a = sendrecv (send/receive) a=sendonly (send only) or a=recvonly (receive only) a = sendrecv (send/receive)

As shown in the above table, the media that was inactive (not sending or receiving) before the transfer can be converted to sendonly (send only), recvonly (receive only) or sendrecv (send/receive) state after the transfer; and before the transfer is sendonly ( Send only) or recvonly (receive only) state media can transition to sendrecv (send/receive) state after transfer.

UE-1 and UE-2 may belong to the same user or different users, which does not affect the realization of the embodiment of the present invention.

Step 403: The SCC AS responds to the message through the CSCF.

The SCC AS may respond with a 202 Accepted message.

Step 404: The SCC AS obtains the capability information of UE-2 through the CSCF.

The SCC AS can obtain the capability information of UE-2 through the OPTION message. The capability information of UE-2 can include supported media types, encoding methods, etc., and the SCC AS can perform the next steps after knowing the capabilities of UE-2.

Step 405: UE-2 responds to the SCC AS through the CSCF.

UE-2 can respond to the SCC AS with a 200OK response message, which means that UE-2 has confirmed the relevant parameters of the transferred media, that is, UE-2 can receive the transferred media.

Step 406: The SCC AS sends a request message (INVITE) for establishing a session to UE-2 through the CSCF, and the request message includes an indication of the continued transmission status of the media after the transfer.

The SCC AS sends a session establishment request message to UE-2, the request message contains new relevant parameters of the transferred media (such as media type, encoding method, etc.), and this parameter is suggested according to the UE-2 equipment capability obtained in step 302 .

The request message also includes an indication of the continued transmission state of the medium after the transfer, so as to require the medium to continue to be transmitted after being transferred to UE-2.

Step 407: UE-2 responds to the SCCAS through the CSCF.

UE-2 may respond to the SCC AS with a 200 OK response message.

Step 408: The SCC AS sends an update message (re-INVITE) to the peer UE through the CSCF, and the update message includes an instruction to change the media in the holding state before the transfer to the continuing transmission state after the transfer.

Sending an update message to the peer UE includes the relevant parameters of the transferred media confirmed by the second terminal, instructing the peer terminal to continue to transmit the transferred media; it also includes an instruction to change the media that was in the hold state before the transfer to the continued transmission state after the transfer , to require the peer terminal to change the media that was in the holding state before the transfer to the continuing transmission state after the transfer.

Step 409: The peer UE responds to the SCC AS through the CSCF.

The peer UE can respond to the SCC AS with a 200OK response message,

Step 410: The SCC AS sends an update message (re-INVITE) to UE-1 through the CSCF, instructing the first terminal to stop sending/receiving the transferred media.

Step 411: UE-1 responds to the SCC AS through the CSCF.

UE-1 may respond to the SCC AS with a 200 OK response message.

The update message sent to UE-1 includes relevant parameters of the transferred media confirmed by the second terminal, and instructs the first terminal to stop sending/receiving the transferred media.

Step 408 and step 409 may be performed after step 410 and step 411, or may be performed at the same time, without affecting the implementation of the embodiment of the present invention.

If there is no media remaining in UE-1 after the media transfer, that is, UE-1 has transferred all the media in the session with the peer terminal to UE-2, then the network side will send a session release message (Bye) to the first terminal to release Steps 410 and 411 may not be executed for the session with UE-1.

In the embodiment of the present invention, by including an indication in the message to change the media in the holding state before the transfer to the continuous transmission state after the transfer, the media in the holding state can also be transferred between different terminal devices and continue to be transmitted.

In order to illustrate the embodiment of the present invention more clearly, the following embodiment 3 illustrates the embodiment of the present invention for a specific application scenario in which terminal A answers the call from terminal C and transfers the call with terminal B to terminal D when terminal A is talking with terminal B .

Embodiment four,

Step 501: Terminal A talks to terminal B.

Step 502: During the call between terminal A and terminal B, an incoming call from terminal C of the third party is answered.

At this time, terminal A puts the call with terminal B on hold, that is, the call between terminal A and terminal B is on hold.

Step 503: Terminal A transfers the call with terminal B to terminal D, and terminal D and terminal B continue the call.

Terminal A and terminal D may be different terminals, for example, terminal A may be a mobile phone, and terminal D may be a landline phone. Terminal A and terminal D may belong to the same user or different users, which does not affect the realization of the embodiment of the present invention.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

The above provides a method for transferring media, and the embodiment of the present invention also provides a terminal, a server, and a communication system capable of transferring media.

A terminal 600 that can transfer media, see FIG. 4, which is a schematic structural diagram of a terminal according to an embodiment of the present invention, including:

The sending unit 601 is configured to send a transfer request message to the network side, the transfer request message requests to transfer the media in the conversation with the peer terminal to another terminal, and includes changing the media in the hold state before the transfer to continue transmission after the transfer status indication;

a transmission unit 602, configured to receive and/or send media;

The control unit 603 is configured to, after the sending unit 601 sends the transfer request message, control the transmission unit 602 to stop receiving and/or sending the media that the sending unit 601 requests to transfer.

The sending unit 601 of the terminal sends a transfer request message to the network side to transfer the media in the hold state to another terminal, requesting to transfer the media in the hold state to another terminal, and the transfer request message includes the The media in the hold state changes to an indication of the continued transmission state; the control unit 603 controls the transmission unit 602 to stop receiving and/or sending the media that the sending unit 601 requests to transfer after the sending unit 601 sends the transfer request message.

The terminal may also include:

The receiving unit 604 is configured to receive update information sent by the network side before the control unit 603 controls the transmission unit 602 to stop receiving and/or sending the media that the sending unit 601 requests to transfer.

The media requested by the terminal to be transferred may be part or all of the media in the session with the remote terminal. If the media requested to be transferred is part of the media in the session, the update information sent by the network side can be received, and the update message can include the relevant parameters of the transferred media confirmed by another terminal receiving the transferred media, and instruct the terminal to stop transmission (send/ Receive) the media that has been transferred out. If the media requested to be transferred is all the media in the session, that is, after the transfer, no terminal will remain in the terminal with the media in the session with the peer terminal, and the network side will send a session release message to the terminal to release the session with the first terminal .

A server 700 that can transfer media, see FIG. 5, FIG. 5 is a schematic structural diagram of a server according to an embodiment of the present invention, including:

The transfer request receiving unit 701 is configured to receive a transfer request message sent by the first terminal, the transfer request message requests to transfer the media in the conversation between the first terminal and the peer terminal to the second terminal, and includes transferring An indication that the medium that was previously on hold has changed to a continuing transmission state;

establishing a session unit 702, configured to establish a session with the second terminal according to the transfer request message received by the receiving transfer request unit;

The transferring unit 703 is configured to transfer the media to the second terminal after the session establishing unit 702 establishes the session with the second terminal, where the media includes the media in a holding state before the transfer.

After the transfer request unit 701 of the server receives the transfer request message sent by the first terminal to transfer the media in the hold state to the second terminal, the transfer request message includes changing the media in the hold state before transfer to continue the indication of the transmission state; the session establishment unit 702 sends a session establishment request message to the second terminal to establish a session with the second terminal; the transfer unit 703 establishes a session with the second terminal in the session establishment unit Afterwards, the media is transferred to the second terminal, where the media includes the media in the holding state before the transfer.

The server also includes:

The instructing unit 704 is configured to instruct a peer terminal having a conversation with the first terminal to continue to transmit media to the second terminal.

A kind of communication system, can transfer medium, referring to Fig. 6, Fig. 6 is the structural representation of the system of the embodiment of the present invention, comprising:

The first terminal 801 is configured to send a transfer request message to the network side 803, the transfer request message requests to transfer the media in the conversation between itself and the peer terminal to the second terminal 802, and the transfer request message includes Indication that the medium in the hold state changes to the continue transmission state;

The second terminal 802 is configured to receive the media transferred from the first terminal 801, where the media includes media that is in a holding state before the transfer;

The network side 803 is configured to receive a transfer request message sent by the first terminal 801, where the transfer request message requests to transfer the media in the conversation between the first terminal 801 and the peer terminal to the second terminal 802, and upon receiving After the transfer request message sent by the first terminal 801 establishes a session with the second terminal 802, the media is transferred to the second terminal 802, and the media includes the media in the hold state before the transfer. An update message may also be sent to the peer terminal having a session with the first terminal 801, where the update message includes an instruction to change the media that was in the hold state before the transfer to the continued transmission state after the transfer;

The communication system also includes:

The peer terminal 804 is configured to continue to transmit to the second terminal 802 the media that is in a holding state before the transfer and is requested by the first terminal 801 . After the first terminal 801 of the system sends a transfer request message to the network side 803 to transfer the media in the hold state to the second terminal 802, the network side 803 sends a session establishment request message to the second terminal 802, and after receiving the second After the terminal 802 responds, it sends an update message to the peer terminal in conversation with the first terminal, and the update message includes an instruction to change the media that was in the hold state before the transfer to a continuous transmission state after the transfer; the peer terminal 804 receives the After updating the information, the network side 803 sends the media in the holding state before the transfer requested by the first terminal 801 to the second terminal 802 .

The communication system may also include:

When the media on hold before the transfer is a part of the session, the network side 803 is further configured to send an update message to the first terminal; the first terminal 801 is further configured to After sending the update message, stop transferring the requested media.

In the embodiment of the present invention, by including an instruction in the message to change the media in the holding state before the transfer to the continuous transmission state after the transfer, the media in the holding state can also be transferred between different terminal devices and continue to be transmitted.

Those of ordinary skill in the art can understand that realizing all or part of the flow in the method of the above-mentioned embodiment can be completed by instructing related hardware through a computer program, and the described program can be stored in a computer-readable storage medium, When the program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

A method, device, and system for transferring media provided by the embodiments of the present invention have been described above in detail. In this paper, specific examples are used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only used to help Understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification is not It should be understood as a limitation of the present invention.

Claims (13)

1. A method for transferring media, characterized in that: receiving a transfer request message sent by the first terminal, the transfer request message requesting to transfer the media in the conversation between the first terminal and the peer terminal to the second terminal, and including changing the media in the holding state before the transfer to an indication of the status of the continuation of the transmission; establishing a session with the second terminal according to the transfer request message; transferring the media to the second terminal, where the media includes media in a holding state before the transfer; After transferring the media to the second terminal, instruct the peer terminal having a session with the first terminal to continue to transmit media to the second terminal. 2. The method for transferring media according to claim 1, wherein said establishing a session with the second terminal is specifically: Sending a session establishment request message to the second terminal, where the session establishment request message includes an indication to continue media transmission. 3. The method for transferring media according to claim 1 or 2, characterized in that, after the transfer, the instruction to change the media that was in the holding state before the transfer to the continuing transmission state after the transfer is specifically: After the transfer, the medium that was in the state of only sending or receiving only before the transfer is changed to the state of both sending and receiving; after the transfer, the medium that was in the state of neither sending nor receiving before the transfer is changed to only sending or only receiving or both Send and receive status indication. 4. The method for transferring media according to claim 1 or 2, characterized in that, the media in the holding state before the transfer is part or all of the media in the session. 5. The method for transferring media according to claim 4, further comprising: after receiving the transfer request message sent by the first terminal: When the media in the hold state before the transfer is part of the media of the session, instruct the first terminal to stop transmitting the media requested to be transferred by the transfer request message. 6. The method for transferring media according to claim 5, characterized in that the instructing the first terminal to stop transmitting the transfer request message to request the transferred media is specifically: Sending an update message to the first terminal to instruct the first terminal to stop transmitting the media requested to be transferred by the transfer request message. 7. A method of transferring media, characterized in that: Send a transfer request message to the network side, the transfer request message requests to transfer the media in the dialogue with the peer terminal to another terminal, and includes an instruction to change the media that was in the holding state before the transfer to the continuing transmission state after the transfer, so that the network The side establishes a session with the other terminal according to the transfer request message, transfers the media to the other terminal, and the media includes the media in the holding state before the transfer, and transfers the media to the other terminal After one terminal, instruct the peer terminal to continue to transmit media to the other terminal; After sending the transfer request message, stop transmitting the media requested to be transferred by the transfer request message to the peer terminal. 8. The method for transferring media according to claim 7, characterized in that, the media that the transfer of the transfer request message to the peer terminal is stopped is specifically: After sending the transfer request message, receive an update message sent by the network side; After receiving the update message sent by the network side, stop transmitting the media requested to be transferred by the transfer request message to the peer terminal. 9. A terminal capable of transferring media, comprising: The sending unit is configured to send a transfer request message to the network side, the transfer request message requests to transfer the media in the dialogue with the peer terminal to another terminal, and includes changing the media in the holding state before the transfer to the continuing transmission state after the transfer instructions; a transmission unit for receiving and/or sending media; The control unit is configured to, after the sending unit sends the transfer request message, control the transmission unit to stop receiving and/or sending the media requested to be transferred by the sending unit. 10. The terminal according to claim 9, further comprising: The receiving unit is configured to receive the update information sent by the network side before the control unit stops transmitting the media requested to be transferred. 11. A server capable of transferring media, comprising: The transfer request receiving unit is configured to receive a transfer request message sent by the first terminal, the transfer request message requests to transfer the media in the conversation between the first terminal and the peer terminal to the second terminal, and includes the Indication that the medium in the hold state changes to the continue transmission state; establishing a session unit, configured to establish a session with the second terminal according to the transfer request message received by the transfer request receiving unit; a transfer unit, configured to transfer the media to the second terminal after the session establishment unit establishes a session with the second terminal, where the media includes media that is in a holding state before the transfer; The instructing unit is configured to instruct the peer terminal having a session with the first terminal to continue to transmit media to the second terminal. 12. A communication system capable of transferring media, comprising: The first terminal is configured to send a transfer request message to the network side, the transfer request message requests to transfer the media in the conversation between itself and the peer terminal to the second terminal, and includes the change of the media that was in the hold state before the transfer after the transfer an indication of the status of the continuation of the transmission; The second terminal is configured to receive the media transferred from the first terminal, where the media includes media that is in a holding state before the transfer; The network side is configured to receive a transfer request message sent by the first terminal, the transfer request message requesting to transfer the media in the conversation between the first terminal and the peer terminal to the second terminal, and according to the received first terminal After the sent transfer request message establishes a session with the second terminal, transfer the media to the second terminal, the media includes the media in the hold state before the transfer, and after transferring the media to the second terminal, indicate The peer terminal having a conversation with the first terminal continues to transmit media to the second terminal; The opposite terminal is configured to continue to transmit the media in the holding state before the transfer requested by the first terminal to the second terminal. 13. The communication system according to claim 12, further comprising: The network side is further configured to send an update message to the first terminal; The first terminal is further configured to, after receiving the update message sent by the network side, stop transmitting the media requested to be transferred to the peer terminal.

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