CN110581866B - File transmission method and IP multimedia subsystem IMS network terminal - Google Patents

File transmission method and IP multimedia subsystem IMS network terminal Download PDF

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Publication number
CN110581866B
CN110581866B CN201810576997.3A CN201810576997A CN110581866B CN 110581866 B CN110581866 B CN 110581866B CN 201810576997 A CN201810576997 A CN 201810576997A CN 110581866 B CN110581866 B CN 110581866B
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China
Prior art keywords
file transmission
file
terminal
called terminal
call request
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CN110581866A (en
Inventor
张凝昊
陆立
彭莉
朱晓洁
王庆扬
张琳峰
杨维忠
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/141—Setup of application sessions

Abstract

The disclosure provides a file transmission method and an IP multimedia subsystem IMS network terminal, and relates to the technical field of communication. The file transmission method comprises the following steps: based on the expanded SDP, sending a file transmission call request to a called terminal through an IMS network; and under the condition of receiving a file transmission response from the called terminal, establishing a file transmission channel with the called terminal so as to transmit a file with the called terminal through the file transmission channel, wherein the file transmission response is fed back by the called terminal under the condition that the file transmission call request is successfully analyzed on the basis of the SDP supported by the called terminal. By the method, the file transmission between the calling party and the called party can be realized by depending on the own functions of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.

Description

File transmission method and IP multimedia subsystem IMS network terminal
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a file transmission method and an IMS (IP Multimedia Subsystem) network terminal.
Background
As a next generation core network of global operator network evolution, the IMS network can realize fixed-mobile integration and provide voice and video services for various users in the network, including audio and video intercommunication between users across countries and operators.
However, the IMS network does not realize the non-real-time data transmission of the file type based on the user number at present, and the user can only realize the data transmission of the file type through a third-party software application or a dedicated file transmission server, and such a manner often requires that both terminals of the file interaction are configured with the same third-party software having a file transmission function, or log in a dedicated file transmission server for uploading and downloading, which is not convenient enough to apply, and limits the popularization and application of the file transmission service.
Disclosure of Invention
An object of the present disclosure is to provide a method for improving the convenience of file transfer for IMS network users.
According to an aspect of the present disclosure, a file transmission method is provided, including: based on the extended SDP (Session Description Protocol), sending a file transmission call request to the called terminal through the IMS network; and under the condition of receiving a file transmission response from the called terminal, establishing a file transmission channel with the called terminal so as to perform file transmission with the called terminal through the file transmission channel, wherein the file transmission response is fed back by the called terminal under the condition that the file transmission call request is successfully analyzed based on the SDP supported by the called terminal.
Optionally, the file transfer media description information is included in the extended SDP.
Optionally, in a case where the calling terminal receives the file transmission rejection information, the calling terminal stops waiting for the file transmission response.
Optionally, the file transmission rejection information comes from the called terminal, and the called terminal feeds back the file transmission rejection information under at least one of the following conditions: the call request is failed to be transmitted based on the SDP analysis file of the called terminal; or the called user refuses to accept the file transmission call request.
Optionally, the file transmission rejection information is from an AGCF (Access Gateway Control Function) node or an MGCF (Media Gateway Control Function) node, and the AGCF and/or the MGCF node stops forwarding the file transmission call request and feeds back the file transmission rejection information when the AGCF and/or the MGCF node receives the file transmission call request.
Optionally, the method further comprises: and releasing the file transmission channel according to the connection canceling operation of the user, and disconnecting the connection with the called terminal.
By the method, the file transmission calling request can be sent based on the expanded SDP protocol, and if the called terminal supports the expanded SDP protocol, a file transmission channel is established between the calling party and the called party in the IMS network for file transmission, so that the file transmission between the calling party and the called party is realized depending on the functions of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
According to another aspect of the present disclosure, a file transmission method is provided, including: receiving a file transmission call request from a calling terminal through an IMS network; transmitting a call request by utilizing an SDP (service description protocol) analysis file supported by the calling terminal, and feeding back a file transmission response to the calling terminal under the condition of successful analysis; and establishing a file transmission channel so as to transmit the file with the calling terminal through the file transmission channel.
Optionally, the method further comprises: and releasing the file transmission channel according to the connection canceling operation of the user, and disconnecting the connection with the calling terminal.
By the method, the file transmission call request from the calling terminal can be received through the IMS network, and the file transmission channel is established between the calling party and the called party in the IMS network for file transmission, so that the file transmission between the calling party and the called party is realized by depending on the self function of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
According to yet another aspect of the present disclosure, an IMS network terminal is provided, including: a request sending module configured to send a file transfer call request to the called terminal via the IMS network based on the extended SDP; a response receiving module configured to receive a file transfer response from the called terminal; and the connection module is configured to establish a file transmission channel with the called terminal under the condition that the response receiving module receives a file transmission response from the called terminal so as to perform file transmission with the called terminal through the file transmission channel, wherein the file transmission response is fed back by the called terminal under the condition that the called terminal successfully analyzes the file transmission call request based on the SDP supported by the called terminal.
Optionally, the file transfer media description information is included in the extended SDP.
The terminal can send a file transmission calling request based on the extended SDP protocol, if the called terminal supports the extended SDP protocol, a file transmission channel is established between the calling party and the called party in the IMS network for file transmission, so that the file transmission between the calling party and the called party is realized by depending on the functions of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
According to still another aspect of the present disclosure, an IMS network terminal is provided, including: a request receiving module configured to receive a file transfer call request from a calling terminal through an IMS network; the response sending module is configured to transmit the call request by utilizing an SDP (service description protocol) analysis file supported by the response sending module, and feed back a file transmission response to the calling terminal under the condition of successful analysis; and the connection module is configured to establish a file transmission channel so as to perform file transmission with the calling terminal through the file transmission channel.
The terminal can receive a file transmission calling request from a calling terminal through the IMS network, and a file transmission channel is established between a calling party and a called party in the IMS network for file transmission, so that file transmission between the calling party and the called party is realized by depending on the self functions of the IMS network, dependence on third-party software and a file transmission server is avoided, and convenience of file transmission is improved.
According to one aspect of the present disclosure, an IMS network terminal is provided, including: a memory; and a processor coupled to the memory, the processor configured to perform any of the file transfer methods mentioned above based on instructions stored in the memory.
The terminal can establish a file transmission channel between the calling terminal and the called terminal in the IMS network for file transmission based on the extended SDP protocol, thereby realizing the file transmission between the calling terminal and the called terminal depending on the self functions of the IMS network, avoiding the dependence on third-party software and a file transmission server, and improving the convenience of file transmission.
According to another aspect of the present disclosure, a computer-readable storage medium is further provided, on which computer program instructions are stored, and the instructions, when executed by a processor, implement the steps of any one of the file transfer methods mentioned above.
By executing the instruction on the computer readable storage medium, a file transmission channel between the calling terminal and the called terminal can be established in the IMS network for file transmission based on the extended SDP protocol, so that the file transmission between the calling terminal and the called terminal is realized by depending on the self function of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
In addition, according to an aspect of the present disclosure, there is provided a file transfer system including: any one of the IMS network terminals mentioned hereinbefore; and at least one of the AGCF node or the MGCF node is configured to stop forwarding the file transmission call request and feed back file transmission rejection information to the calling terminal after receiving the file transmission call request.
The file transmission system can realize the file transmission based on the IMS network, and can intercept the forwarding process by the signaling forwarding node and reply the file transmission rejection information under the condition that the called terminal does not support the file transmission call definitely, thereby improving the efficiency of rejecting the request when the network or terminal attribute where the called terminal is located does not support the file transmission on one hand, and on the other hand, the request does not need to be forwarded to the terminal side for matching judgment, thereby reducing the burden of the called terminal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and do not constitute a limitation of the disclosure in any way. In the drawings:
fig. 1 is a flowchart of one embodiment of a file transfer method of the present disclosure.
Fig. 2 is a flowchart of another embodiment of a file transfer method of the present disclosure.
Fig. 3 is a schematic diagram of an embodiment of an IMS network terminal according to the present disclosure.
Fig. 4 is a schematic diagram of another embodiment of an IMS network terminal of the present disclosure.
Fig. 5 is a schematic diagram of yet another embodiment of an IMS network terminal of the present disclosure.
Fig. 6 is a schematic diagram of yet another embodiment of an IMS network terminal of the present disclosure.
FIG. 7 is a schematic diagram of one embodiment of a file transfer system of the present disclosure.
Fig. 8 is a schematic diagram illustrating an embodiment of file transfer between IMS users in a domain in the file transfer method according to the present disclosure.
Fig. 9 is a schematic diagram of an embodiment of file transfer between cross-domain IMS users in the file transfer method of the present disclosure.
Detailed Description
The technical solution of the present disclosure is further described in detail by the accompanying drawings and examples.
A flow diagram of one embodiment of a file transfer method of the present disclosure is shown in fig. 1.
In step 101, a file transfer call request is sent to the called terminal via the IMS network based on the extended SDP. In one embodiment, the extended SDP includes file transfer media description information, for example, a new media description line M ═ file 0RTP/AVP, the file transfer call media type is increased, and a file transfer call is initiated in combination with an IMS SIP call standard flow. In one embodiment, the user may send a file transfer call request to the called terminal by triggering a file transfer call function, such as sending a short message and making a call.
In step 102, it is determined whether a file transfer response is received from the called terminal. If the file transmission response is received, step 103 is executed. In one embodiment, if no file transfer response is received within a predetermined time period or a file transfer rejection message is received, the waiting for a file transfer response is stopped.
In one embodiment, the file transfer response may be a 180 response, thereby enabling the calling and called subscribers to perform SDP negotiation.
In step 103, the calling terminal and the called terminal establish a file transmission channel so as to perform file transmission with the called terminal through the file transmission channel. In one embodiment, file transfer using the file transfer channel is not limited to being sent by the calling terminal to the called terminal, nor to being sent by the called terminal to the calling terminal. The calling terminal and the called terminal can freely perform file interaction by using the file transmission channel until the connection is disconnected and the file transmission channel is released. In one embodiment, the connection may be disconnected under the active operation of the user and the file transfer channel is released.
By the method, the file transmission calling request can be sent based on the expanded SDP protocol, and if the called terminal supports the expanded SDP protocol, a file transmission channel is established between the calling party and the called party in the IMS network for file transmission, so that the file transmission between the calling party and the called party is realized depending on the functions of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
A flow chart of another embodiment of the file transfer method of the present disclosure is shown in fig. 2.
In step 201, the called terminal receives a file transfer call request from the calling terminal through the IMS network.
In step 202, the called terminal transmits the call request using the SDP parsing file supported by itself, and if the parsing is successful, step 203 is executed. In one embodiment, if the parsing is unsuccessful, the called terminal may feed back file transmission rejection information, thereby stopping the call process.
In an embodiment, it may also be determined whether to feed back a file transmission response to the calling terminal based on the called terminal using the user's operation in the case that the parsing passes, for example, when the called user accepts the call, step 203 is executed; if the called user hangs up the call, the file transmission rejection information can be fed back to the calling terminal.
In step 203, the called terminal feeds back a file transfer response to the calling terminal.
In step 204, the called terminal and the calling terminal establish a file transmission channel, and perform a file transmission operation through the file transmission channel. In one embodiment, file transfer using the file transfer channel is not limited to being sent by the calling terminal to the called terminal, nor to being sent by the called terminal to the calling terminal. The calling terminal and the called terminal can freely perform file interaction by using the file transmission channel until the connection is disconnected and the file transmission channel is released. In one embodiment, the connection may be disconnected under the active operation of the user and the file transfer channel is released.
By the method, the file transmission call request from the calling terminal can be received through the IMS network, and the file transmission channel is established between the calling party and the called party in the IMS network for file transmission, so that the point-to-point file transmission between the calling party and the called party is realized by depending on the self functions of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
In one embodiment, the file transmission rejection information received by the calling terminal may come from the called terminal, and the file transmission rejection information is fed back if the called terminal cannot analyze the file transmission call request based on its own SDP or if the called user rejects to accept the call request; in another embodiment, the file transmission rejection information may also come from the AGCF or MGCF node, that is, when the calling IMS network terminal sends a file transmission call request to the non-IMS domain or the h.248 terminal, the call request needs to pass through the MGCF in the process of forwarding to the non-IMS domain user, and needs to pass through the AGCF in the process of calling to the h.248 terminal, and the MGCF or AGCF serving as the forwarding node stops forwarding the file transmission call request and feeds back the file transmission rejection information.
By the method, the signaling forwarding node can intercept the forwarding process and reply the file transmission rejection information under the condition that the called terminal does not support the file transmission calling request, so that the efficiency of rejecting the request when the network or terminal attribute where the called terminal is located does not support file transmission is improved on one hand, and the request does not need to be forwarded to the terminal side for matching judgment on the other hand, and the burden of the called terminal is reduced.
A schematic diagram of one embodiment of an IMS network terminal of the present disclosure is shown in fig. 3. The request sending module 301 can send a file transfer call request to the called terminal via the IMS network based on the extended SDP. In one embodiment, the extended SDP includes file transfer media description information, for example, a new media description line M ═ file 0RTP/AVP, the file transfer call media type is increased, and a file transfer call is initiated in combination with an IMS SIP (Session Initiation Protocol) call standard flow. The response receiving module 302 can receive a file transfer response from the called terminal. The connection module 303 can establish a file transfer channel with the called terminal in a case where the response receiving module receives a file transfer response from the called terminal. In one embodiment, the called terminal feeds back the file transfer response in case the file transfer call request is successfully parsed based on the SDP supported by the called terminal. In another embodiment, when the file transmission call request is successfully analyzed and the called user allows, the called terminal feeds back the file transmission response.
The IMS network terminal can send a file transmission calling request based on the expanded SDP protocol, if the called terminal supports the expanded SDP protocol, a file transmission channel is established between the calling party and the called party in the IMS network for file transmission, so that the file transmission between the calling party and the called party is realized depending on the functions of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
A schematic diagram of another embodiment of an IMS network terminal of the present disclosure is shown in fig. 4. The request receiving module 401 can receive a file transfer call request from the calling terminal through the IMS network.
The response sending module 402 can analyze the file transmission call request by using the session description protocol SDP supported by itself, and if the analysis is successful, the file transmission response is fed back to the calling terminal. In one embodiment, if the parsing is unsuccessful, a file transmission rejection message is fed back to the calling terminal, thereby stopping the calling process. In one embodiment, it may also be determined whether to feed back a file transmission response to the calling terminal based on the called terminal using the user's operation if the parsing is successful, and if the called user accepts the call, feed back the file transmission response to the calling terminal; if the called user hangs up the call, the file transmission rejection information can be fed back to the calling terminal.
The connection module 403 can establish a file transmission channel with the calling terminal under the condition that the response sending module 402 feeds back the file transmission response, and perform a file transmission operation through the file transmission channel. In one embodiment, file transfer using the file transfer channel is not limited to being sent by the calling terminal to the called terminal, nor to being sent by the called terminal to the calling terminal. The calling terminal and the called terminal can freely perform file interaction by using the file transmission channel until the connection is disconnected and the file transmission channel is released. In one embodiment, the connection may be disconnected under the active operation of the user and the file transfer channel is released.
The IMS network terminal can receive a file transmission call request from a calling terminal through the IMS network, and a file transmission channel is established between a calling party and a called party in the IMS network for file transmission, so that file transmission between the calling party and the called party is realized by depending on the self function of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
In one embodiment, the file transmission rejection information received by the calling IMS network terminal may come from the called terminal, and if the called terminal cannot analyze the file transmission call request based on its SDP or the called user rejects to accept the call request, the file transmission rejection information is fed back; in another embodiment, the file transmission rejection information may also come from the AGCF or MGCF node, that is, if the called terminal does not support the file transmission call request, the forwarding node intercepts the forwarding process and replies the file transmission rejection information, so that on one hand, the efficiency of rejecting the file transmission call request is improved when the network or terminal attribute where the called terminal is located does not support file transmission, on the other hand, the request does not need to be forwarded to the terminal side for matching judgment, and the burden of the called terminal is reduced.
In an embodiment, the IMS network terminal may have the modules in the embodiments shown in fig. 3 and fig. 4, so that the IMS network terminal may be used as both a calling party and a called party of a file transfer call, thereby further improving the convenience of file transfer.
A schematic structural diagram of an embodiment of an IMS network terminal of the present disclosure is shown in fig. 5. The IMS network terminal includes a memory 501 and a processor 502. Wherein: the memory 501 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used for storing the instructions in the corresponding embodiments of the file transfer method above. Coupled to the memory 501, the processor 502 may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 502 is used for executing the instructions stored in the memory, and can realize the file transmission between the calling party and the called party by depending on the self functions of the IMS network, thereby avoiding the dependence on third-party software and a file transmission server and improving the convenience of file transmission.
In one embodiment, as also shown in fig. 6, IMS network terminal 600 includes memory 601 and processor 602. The processor 602 is coupled to the memory 601 by a BUS 603. The IMS network terminal 600 may also be connected to an external storage 605 via a storage interface 604 for invoking external data, and may also be connected to a network or another computer system (not shown) via a network interface 606. And will not be described in detail herein.
In the embodiment, the data instruction is stored in the memory, and the processor processes the instruction, so that the file transmission between the calling party and the called party can be realized by depending on the self function of the IMS network, the dependence on third-party software and a file transmission server is avoided, and the convenience of file transmission is improved.
In another embodiment, the present disclosure also proposes a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiment of the file transfer method. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Fig. 7 shows a schematic diagram of an embodiment of the file transfer system of the present disclosure, which includes a plurality of any one of the above-mentioned IMS network terminals 701 to 70n, where n is a positive integer greater than 1, and the IMS network terminal is connected to the IMS network 71, and completes interaction between the terminals through the IMS network 71. The file transmission system also comprises at least one of AGCF72 or MGCF73 node, and can stop forwarding the file transmission call request and feed back file transmission rejection information to the calling terminal after receiving the file transmission call request from the IMS network.
In one embodiment, this may be as shown in fig. 8, 9:
when the calling IMS network terminal and the called terminal are located in the same domain, as shown in fig. 8, if the calling IMS network terminal 801 sends a file transfer call request to the called IMS network terminal 802, the calling and called parties establish a file transfer channel as indicated by a thick arrow when the called IMS network terminal 802 successfully parses and the called user allows.
If the calling IMS network terminal 801 sends a file transfer call request to the non-IMS domain user 803, the call request needs to pass through the MGCF805 in the process of forwarding to the non-IMS domain user 803, and the MGCF805 stops forwarding the file transfer call request and feeds back file transfer rejection information.
Similarly, if the calling IMS network terminal 801 sends a file transfer call request to the h.248 terminal 804, because the capability of the h.248 terminal is insufficient and all h.248 terminals are hung under the AGCF806, the AGCF806 stops forwarding the file transfer call request when receiving the file transfer call request and feeds back file transfer rejection information.
Under the condition that the IMS network terminals of the calling and called parties are across domains, as shown in fig. 9, the file transfer Call request is sent to a S-CSCF (serving-Call Session Control Function) of the calling party through a P-CSCF (Proxy-Call Session Control Function)/BAC (Border Access Controller) device of the calling party, is sent to an I-CSCF (service-Call Session Control Function) of the called party through an I-BAC (interface Border Access Controller) device, is sent to an I-CSCF (interworking Call Session Control Function) of the called party through an I-BAC (Border Access Controller) device of the called party, and is sent to the IMS network terminal of the called party through the S-CSCF of the called party and the P-CSCF/BAC of the called party; and under the condition that the called IMS network terminal analyzes and passes the file transmission call request, feeding back a file transmission response to the calling IMS network terminal, and establishing a file transmission channel by the calling IMS network terminal and the called IMS network terminal as shown by thick arrows.
The file transmission system can realize the file transmission based on the IMS network, and can intercept the forwarding process by the signaling forwarding node and reply the file transmission rejection information under the condition that the called terminal does not support the file transmission call definitely, thereby improving the efficiency of rejecting the request when the network or terminal attribute where the called terminal is located does not support the file transmission on one hand, and on the other hand, the request does not need to be forwarded to the terminal side for matching judgment, thereby reducing the burden of the called terminal.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above embodiments are merely to illustrate the technical solutions of the present disclosure and not to limit the same; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the disclosure or equivalent substitutions for some features may still be made; without departing from the spirit of the disclosed solution, it should be understood that the scope of the claims of the present disclosure is intended to be covered thereby.

Claims (8)

1. A file transfer method, comprising:
based on the extended session description protocol SDP, sending a file transmission call request to the called terminal through an IP multimedia subsystem IMS network;
under the condition of receiving a file transmission response from a called terminal, establishing a file transmission channel with the called terminal so as to carry out bidirectional file transmission with the called terminal through the file transmission channel, wherein the file transmission response is fed back by the called terminal under the condition that the file transmission calling request is successfully analyzed based on an SDP (service description protocol) supported by the called terminal;
and under the condition that the calling terminal receives file transmission rejection information, stopping waiting for the file transmission response, wherein the file transmission rejection information comes from an Access Gateway Controller (AGCF) or a Media Gateway Control Function (MGCF) node, and under the condition that the AGCF and/or the MGCF node receives the file transmission call request, the AGCF and/or the MGCF node stops forwarding the file transmission call request and feeds back the file transmission rejection information.
2. The method of claim 1, wherein file transfer media description information is included in the extended SDP.
3. The method of claim 1 or 2, further comprising:
and releasing the file transmission channel according to the connection canceling operation of the user, and disconnecting the connection with the called terminal.
4. An IP multimedia subsystem, IMS, network terminal comprising:
the request sending module is configured to send a file transfer call request to the called terminal through an IP Multimedia Subsystem (IMS) network based on an extended Session Description Protocol (SDP);
a response receiving module configured to receive a file transfer response from the called terminal;
the connection module is configured to establish a file transmission channel with the called terminal under the condition that the response receiving module receives a file transmission response from the called terminal so as to perform bidirectional file transmission with the called terminal through the file transmission channel, wherein the file transmission response is fed back by the called terminal under the condition that the called terminal successfully analyzes a file transmission call request based on an SDP (service description protocol) supported by the called terminal; and under the condition of receiving file transmission rejection information, stopping waiting for the file transmission response, wherein the file transmission rejection information comes from an Access Gateway Controller (AGCF) or a Media Gateway Control Function (MGCF) node, and under the condition that the AGCF and/or the MGCF node receives the file transmission call request, the AGCF and/or the MGCF node stops forwarding the file transmission call request and feeds back the file transmission rejection information.
5. A terminal as in claim 4, where the extended SDP includes file transfer media description information.
6. An IP multimedia subsystem, IMS, network terminal comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-3 based on instructions stored in the memory.
7. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 3.
8. A file transfer system comprising:
an IP multimedia subsystem, IMS, network terminal as claimed in any of claims 4 to 6; and (c) and (d),
at least one of the access gateway controller AGCF or the media gateway control function MGCF node is configured to stop forwarding the file transmission call request and feed back file transmission rejection information to the calling terminal after receiving the file transmission call request.
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