KR100695388B1 - System and method for providing the alternative multimedia contents during communication in SIP - Google Patents

Abstract

The present invention relates to a method and a system for providing a video call service based on a session initiation protocol (SIP). During a video call between users, a user of one side selects multimedia content owned by a service provider instead of his own video. It provides a method and system for providing alternative multimedia content during a video call to send to the user of the other party, to prevent the user's video is exposed to the other party during the video call, thereby protecting the privacy of the user, the user's video It is possible to reduce the video call burden due to exposure, so that the video call service can be activated, and various multimedia can be sent to the other party instead of the user's video, thereby enabling interactive communication between users. has exist.

Session Initiation Protocol (SIP), Video Calls, Alternate Multimedia Contents

Description

System and method for providing the alternative multimedia contents during communication in SIP}

1 is a configuration diagram of an alternative multimedia content providing system during a video call according to the present invention.

2 is a flowchart illustrating a method of providing alternative multimedia content during a video call according to the present invention.

* Explanation of symbols on the main parts of the drawing

10: application server 20: content server

30: media server 50: terminal A

60: terminal B

The present invention relates to a method and a system for providing a video call service based on a session initiation protocol (SIP), and more particularly, to a multimedia service provided by a service provider in place of a user's own video during a video call between users. The present invention relates to a method and system for providing alternative multimedia content during a video call for selecting and sending the content to a user on the other end.

In the conventional voice communication service in the mobile communication network (PLMN) and the public telephone network (PSTN), the image of the wired / wireless Internet network (IP network or packet data network), which has recently been in the spotlight, is compared to the simple communication between users by voice. Call services (eg, conferences, telephones, voicemail, event notifications, instant messaging, etc.) allow voice calls between users while looking at each other's faces.

The video call service in the wired / wireless internet network is based on the Session Initiation Protocol (SIP). The session initiation protocol is a VOIP protocol established by the Internet Engineering Task Force (IETF) -MMUSIC WG, and is an application layer signaling protocol that specifies a procedure for creating / modifying / ending sessions between participants.

However, in the video call service as described above, since the video taken by the camera of the terminal, that is, the user's image (eg, the user's face, the user's home, etc.) is shown to the other user, even the video that is not desired to be shown to others is exposed. There is this. As a result, the user is not protected due to the video call, and the user is reluctant to use the service due to the burden of the video call.

Furthermore, considering the communication between users in a video call, if you want to give a laugh to the other user, to show a special video, to confess love, etc. There is an urgent need for a technology that allows users to communicate with each other so that more interactive communication can be achieved.

The present invention has been proposed to solve the above problems and to meet the above demands, and during a video call between users, the user of one side selects the multimedia content owned by the service provider instead of his or her own video. It is an object of the present invention to provide a method and a system for providing alternative multimedia content during a video call for sending to a user of.

The system of the present invention for achieving the above object is a terminal initiation protocol (SIP) -based video call service having a multi-session processing function, a multi-data processing function and a multi-screen processing function and In the system provided to the terminal B, the alternative multimedia content selection menu is provided to the terminal A, the alternative multimedia content ID (CID) selected by the user is transmitted to the terminal A or the application server, and the alternative multimedia content selected by the user. A content server that shares data with the media server; In a state where a video call session is established between the terminal A and the terminal B, upon receiving a request for transmission of an alternative multimedia content selected by the user from the terminal A, the terminal authenticates whether to subscribe to a service, and a media server for the alternative multimedia content selected by the user. Inquires about the corresponding contents information, informs the terminal B of the transmission of the alternative multimedia contents through the new session by using the checked contents information as a parameter, and with reference to the terminal information received from the terminal B as a result of the notification, The application server instructing the media server to determine suitable alternate multimedia content and transmit to the terminal B through a new session with the terminal B; And sharing the alternative multimedia content data selected by the user with the content server, providing the alternative multimedia content information selected by the user to the application server, and determining the content with reference to the terminal information of the terminal B received from the application server. And a media server that establishes a new session with the terminal B and transmits the replacement multimedia content to the terminal B according to the content transfer start command from the application server.

On the other hand, the method of the present invention, the terminal A and terminal B having a multi-session processing function, a multi-data processing function and a multi-screen processing function of the Session Initiation Protocol (SIP) based video call service in the application server The method of claim 1, further comprising: authenticating whether the terminal A subscribes to a service when the terminal A receives a request for transmission of an alternative multimedia content selected by the user while a video call session is established between the terminal A and the terminal B. step; A second step of inquiring a content selected by the user from a media server if the user is subscribed to the service as a result of the authentication; A third step of notifying the terminal B of an alternative multimedia content transmission schedule through a new session using the checked content information as a parameter; A fourth step of instructing the media server to determine an appropriate alternative multimedia content by referring to the terminal information received from the terminal B as a result of the third step; And a fifth step of instructing the media server to transmit the determined replacement multimedia content to the terminal B through a new session with the terminal B.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

1 is a configuration diagram of an alternative multimedia content providing system during a video call according to the present invention.

A communication network to which the present invention is applied is provided with a system (hereinafter, referred to as a "SIP system") for providing a video call service between terminals based on a Session Initiation Protocol (SIP). Those skilled in the art will readily understand that basic components, such as a SIP exchange processing a call and a location server that registers / provides location information (routing information) of the terminal and the like, are provided.

As shown in FIG. 1, the system for providing alternative multimedia contents during a video call according to the present invention performs call processing (message relay during a terminal period, service authentication, etc.) required for providing alternative multimedia contents to a counterpart terminal between terminals in video communication. SIP application server (SIP application server, hereinafter referred to as "application server") (10) to perform, subscriber DB (11), which stores subscriber information (terminal information, service subscription, etc.), user alternative multimedia content selection A content server 20 for providing a menu, a content DB 21 for storing multimedia content, and a media server 30 for transmitting a substitute multimedia content selected by one user to a terminal of the other user.

As in the existing video call service, the terminal used in the present invention includes a mobile communication terminal 40, an IP telephone 41, a computer 42, a notebook 43, a PDA 44, and the like. Preferably, the specification and support specifications of the terminal used in the present invention should be equipped with an Internet connection function and a multimedia content storage / playback function, a display capable of displaying the multimedia content playback result, a speaker or Earphones, handsets or headsets may be provided.

In particular, the terminal used in the present invention, preferably a terminal receiving (receiving) alternative multimedia content, should be equipped with a multi-session processing function.

In addition, the terminal receiving (receiving) the alternative multimedia content displays the data (the other user's video) received through the video call session established with the other terminal on the screen, and a new session is established with the media server. When receiving data (alternate multimedia content) through the data, the data processing function or screen processing function to prevent the data received through the video call session is displayed on the screen, and to display only the data received through the new session on the screen Alternatively, the session processing function is preferably mounted.

That is, when a new session is established during the video communication and receives the alternative multimedia content from the media server, the terminal should show the alternative terminal content to the user and then show only the alternative multimedia content to the user.

In this case, since the terminal only needs to show the alternative multimedia contents as a result, the terminal deactivates the window in which the video of the counterpart user is displayed and activates only the window in which the alternative multimedia contents are displayed or received through a video call session. Deactivate the video data of the other end user and pass the alternate multimedia content data received through the new session to be displayed on the screen or deactivate the video call session (where the session is not terminated but the session state remains intact). And a method of activating only a new session can be used.

In addition, the terminal displays each data (relative user image, alternative multimedia content) transmitted and received through each session with a picture in picture (PIP), a split screen function, or a multiple window. It is equipped with a function that can be displayed on, and through this screen processing function, the user can be recognized that the image of the counterpart user has been replaced by multimedia content.

In the present invention, during a video call between users of a terminal having a video call session established by a SIP system, a user of one side replaces his or her own video with a substitute multimedia content held by a service provider (preferably, the content server 20). Select it and provide it to the user on the other side. Here, the media type used as the alternative multimedia content may be anything that is displayed on the display of the terminal such as a video, a photo, a still image, an animated image, an emoticon, a wallpaper, an avatar, a flash, and the like.

On the other hand, in the present invention, in order to provide the user with the alternative multimedia content held in the service provider to the counterpart user, it is preferable to subscribe to a separate service, and the web (swapp) operated by the SIP system (or the application server 10). Register your terminal while subscribing to the alternative multimedia contents service through the site, customer center, etc.

In the SIP system, subscriber information is shared (subscriber) with the application server 10 when the user tries to send the alternative multimedia content to the counterpart user, that is, when the user connects to the content server 20 and selects a specific content from the content list. It is preferable to perform the service subscription authentication in the content server 20 through the subscriber / terminal information sharing of the DB (11). In addition, when the user requests the application server 10 to transmit the selected alternative multimedia content to the counterpart terminal, it is preferable that the application server 10 perform service authentication.

In addition, in a SIP system, since a request for a terminal is first received at a SIP exchange, the SIP system authenticates whether the SIP exchange receives a replacement multimedia content request from the terminal, and the SIP exchange applies an alternative multimedia content transmission request call of the terminal. It is preferable to route to the server 10 so that the service processing of the present invention can be performed in the application server 10.

Meanwhile, the content server 20 stores various multimedia contents in the content DB 21 and provides an alternative multimedia content selection menu to a user connected through the terminal. Here, the user checks the file name, type, detailed information, etc. of various multimedia contents, and selects contents to be sent to the counterpart user.

The content server 20 preferably authenticates whether the user is subscribed to the alternative multimedia content providing service. To this end, the content server 20 shares subscriber information of the subscriber DB 11 through interworking with the application server 10. Preferred (storing copies of subscriber information, etc.).

In addition, the content server 20 provides a content selection menu to the user and transmits a content ID (CID: Contents ID), not actual data of the content, to the user's terminal. Since the media server 30 should be transmitted to the counterpart user's terminal, all of the content data stored in the content DB 21 is stored in the media server 30 in a copy form, or at the time when the user's content selection is made. The content data is sent to the media server 30 to be stored.

Meanwhile, in the present invention, the media server 30 may include the functions of the content server 20 without having the content server 20. However, in reality, there are a number of content providers (CP; Contents Provider) in addition to the video call service provider, and has a specialized content for each content provider to provide a variety of content to the user, the media server 30 is replaced The intrinsic function of multimedia content transmission is implemented, and each content server 20 preferably provides a content selection menu to the user, and sends the content data selected by the user to the media server 30. In addition, it is preferable that a unique ID is assigned to each content in advance so that various contents provided by each content provider in the media server 30 can be identified.

As another example, the content server 20 transmits the content ID to the user's terminal when the user's content selection is made as described above, and the content server 20 sends the content ID selected by the user to the application server 10 afterwards. It may also request that the call is handled by notifying that there will be a request for providing alternative multimedia content from the user's terminal. At this time, it is preferable to notify in advance that the content sent to the terminal of the counterpart user corresponds to the above content ID. In this case, the terminal does not need to send the content ID to the application server 10 when the request for providing the alternative multimedia content.

Meanwhile, as described above, the media server 30 stores content data through interworking with the content server 20 (data sharing). When the media server 30 receives an inquiry of content information from the application server 10, the media server 30 receives the property information of the corresponding content ( Eg format information, playback codec, etc.) is returned. Accordingly, the application server 10 transmits the attribute of the returned content to the terminal to which the alternative multimedia content is to be provided and inquires whether it is a playable multimedia content. Forwards the command to determine the multimedia content suitable for the terminal and transmit the same to the terminal.

In particular, the media server 30 establishes a new session with the terminal to which the alternative multimedia content is to be provided according to the command of the application server 10 and transmits the multimedia content through the new session.

Hereinafter, referring to FIG. 2, a method of providing alternative multimedia contents during a video call of the present invention will be described in detail. A terminal A of two terminals receiving a video call service, that is, a video call session is established, has a reference numeral ". 50 "and the terminal B will be described with reference to" 60 ". In addition, it will be readily apparent to one skilled in the art that a terminal provided with alternative multimedia content during a video call may not be limited to one terminal but may be multiple terminals (eg, video conferencing, etc.).

2 is a flowchart illustrating a method of providing alternative multimedia content during a video call according to the present invention. On the other hand, the meaning of a SIP message, for example, an "in-byte message [INVITE (sdp # 1)]" means sdp (session description protocol) information called "# 1" in the body of the in-byte message [ie, a terminal. Media information (type) supported by A 50] is inserted, and "sdp # 2" means media information supported by the terminal B 60. In other words, terms shown in parentheses indicate session information, media information, commands, and the like, which are inserted into the body and header of a message. The invite message is a message used for negotiating a session when a session is to be created between terminals, and a by message [BYE] is a message used for session negotiation when terminating a session established between terminals.

First, a video call is made between a user in a state in which a video call session is established between the terminal A 50 and the terminal B 60 by the SIP system (200). Here, the users make a video call through a microphone, a speaker, or the like while showing their image taken by the camera of the terminal 50 or 60 or the surrounding image of the user side to the other party. At this time, video data and audio data between users are transmitted and received on a real-time transport protocol (RTP).

Additionally, a video call session is established between the terminal A 50 and the terminal B 60 as follows.

In order to request a video call connection to the terminal B 60, the terminal A 50 sends an invite message [INVITE (INVITE ()] to the SIP system with its media information (such as the media type supported by the terminal A 50) as a parameter. sdp # 1)], the SIP system relays the invite message [INVITE (sdp # 1)] to the terminal B 60 to inform that there is a video call connection request from the terminal A 50. Accordingly, the terminal B 60 rings a local ring in response to the reception of the invite message, notifying the user that a call has been made, and then sending a 180 ringing message to the SIP system using its sdp information (media information) as a parameter. (sdp # 2)]. In addition, the terminal B 60 may not ring the local ring in response to the reception of the invite message, and may then ring the local ring after transmitting and receiving the PRACK message and the 200 OK message. Here, the PRACK message is a message used as a temporary response to a reliable transmission as defined in SIP (provisional responses acknowlegde). Then, the SIP system relays the 180 ringing message (180 Ringing (sdp # 2)) inserted with the sdp information (sdp # 2) received from the terminal B 60 to the terminal A 50, and accordingly, a video call. A PRACK message and a 200 OK message are transmitted and received between the terminal A 50 and the terminal B 60 by the relaying of the SIP system, indicating that the preprocessing process for the session establishment is ready. Subsequently, when the user picks up the handset at the terminal B 60, the 200 OK message and the ACK message corresponding to the call answering fact are mutually transmitted and received, and then a video call session is established.

Subsequently, while making a video call between users while viewing each other's video, the user of one side (in the present invention, both the user making the video call call and the user receiving the video call call can send the alternative multimedia content of the present invention to the other party, In the following description, the terminal A user selects an alternative multimedia content owned by the service provider and sends it to the other party as an example), that is, the terminal A user uses the Internet access function of the terminal in order not to show his or her face to the other party. After accessing the content server 20 through the alternative multimedia content transmission menu, the alternative multimedia content to be sent to the counterpart is selected from among contents held by the service provider (201).

At this time, the content server 20 authenticates whether the terminal A user is subscribed to the service through sharing subscriber information with the application server 10 (storing a copy of subscriber / terminal information of the subscriber DB 11, etc.). You may. On the other hand, the terminal A (50) is connected to the content server (20) through a session separate from the existing video call session through a multi-session processing function, and at this time, the terminal A (50) and the terminal B (60). The existing video call session does not end.

Then, the content server 20 transmits the alternative multimedia content ID (CID) selected by the user of the terminal A to the terminal A 50 (202). Here, the content server 20 sending the content ID to the terminal A 50 means to send a message to the application server 10 to transmit the alternative multimedia content corresponding to the content ID to the terminal B 60. to be.

In particular, since the alternative multimedia content is transmitted from the media server 60 to the terminal B 60, the content server 20 corresponds to the content ID to the media server 30 at the time when the content ID is transmitted to the terminal A 50. Substantial content data is transmitted, so that the corresponding content data is stored in the media server 30 (202a). Meanwhile, the content ID and the content data may be shared between the content server 20 and the media server 30 in advance and stored in each DB.

Meanwhile, when the content server 20 selects the content of the user as described above, the content server 20 may transmit the content ID to the terminal A 50. In another example, the content server 20 may apply the content ID selected by the user. It may be sent to the server 10 to inform the application server 10 that there will be a request for providing alternative multimedia content from the terminal A (50) of the user later may request to perform the call processing. At this time, it is preferable to notify in advance that the content sent to the terminal B 60 corresponds to the above content ID. In this case, the terminal A 50 does not need to send the content ID to the application server 10 when the request for providing the alternative multimedia content.

Subsequently, the terminal A 50 transmits the alternative multimedia content corresponding to the above content ID to the terminal B 60 based on the content ID received from the content server 20. The content ID (CID) is loaded in the invite message [INVITE (CID)] and transmitted to the SIP system to request creation of a new session (203). Then, the SIP system determines the content ID of the invite message received from the terminal A 50 as a report replacement multimedia content providing call processing attempt, and sends a call processing request from the terminal A 50 to the application server 10. Routing allows the service to be processed. Here, the SIP system may authenticate whether the terminal A 50 subscribes to the alternative multimedia content providing service.

Accordingly, the application server 10 authenticates whether the terminal A 50 subscribes to the alternative multimedia content providing service, and if authentication succeeds as a result of the service subscription authentication (204), the service of the present invention for pre-processing alternative multimedia content providing. Perform the process.

That is, the application server 10 selects the content ID selected by the terminal A user (the content ID may be received from the terminal A 50 or may be received from the content server 20 as in the above two examples). On the basis of this, the media server 30 transmits an invite message [INVITE (CID)] in which the content ID is inserted, and inquires about the contents matter (sdp information such as format information and playback codec) corresponding to the above content ID. (205).

Then, the media server 30 responds to the application server 10 by loading the corresponding content attribute (format information, playback codec, etc.) and related media information in a 200 OK message [200 OK (sdp MM)] (206). ). Here, "MM" is an abbreviation of Media Mask and means substitute image information (media information). Meanwhile, when a service error occurs, such as when the content requested from the application server 10 does not exist, the media server 30 transmits the replacement multimedia content to the terminal A 50 in response to the fact that the application server 10 has failed. Be notified of the failure.

Then, the application server 10 applies a new session creation request process for relaying the invite message received from the terminal A 50 to the terminal B 60 in step 203, in step 206. The content attribute and the related media information (sdp MM) received from the media server 30 are loaded in the byte message [INVITE (sdp MM)] and transmitted to the terminal 60 to support this content along with the request for creating a new session. Inquire about whether it is possible (207).

In particular, the new invite message transmitted from the application server 10 to the terminal B 60 in step 207 may further include an identifier indicating that an alternative multimedia content is to be transmitted. That is, the terminal B 60 recognizes that a new session will be established later through a new invite message, and recognizes the function in advance by using a service identifier how to process data received through the new session. You are ready.

That is, the terminal B 60 prepares a session processing function, a screen processing function, or a data processing function in advance when receiving the substitute multimedia content transmission scheduled identifier. For example, a data session (relative user video) received through a video call session established with terminal A 50 later is displayed on the screen, and a new session is established with the media server 30. Multimedia content), the data received through the video call session is not displayed on the screen, and pre-processing to ensure that only the data received through the new session is displayed on the screen in advance.

In addition, some SIP-based terminals automatically reject an additional session setup request with a "486 Busy Response" to indicate that they are currently in a video call when they receive an additional session setup request (new invite message) other than the currently established session. However, it is preferable to prevent the terminal from denying the additional session establishment request with the above additional multimedia content transmission schedule identifier.

On the other hand, when the application server 10 makes a new session creation request for the transfer of the alternative multimedia content to the terminal B (60), the terminal A (50) in the state transitioned to SIP B2BUA (Back-to-Back User Agent) mode It is preferable to transmit a new invite message having a dialog different from the invite transaction received from the terminal B 60.

Then, when the terminal B 60 receives a new session creation request, that is, an invite message, as defined in the SIP, the terminal A 50 transmits a 180 ringing message [180 Ringing] to the application server 10. In the present invention, the terminal A (50) has requested a new session creation, but in reality, a 180 ringing message of the terminal B (60) is received since the request is actually a new session creation request between the media server (30) and the terminal B (60). It should not be transmitted to the terminal A (50).

Accordingly, in the present invention, local ring processing and tone signal output processing according to the reception of the 180 ringing message and the 180 ringing message are required in each terminal 50 and 60 (208, 209). 60 does not transmit the 180 ringing message to the application server 10 even if the new invite message is received or the 180 ringing message is received even if the application server 10 receives the 180 ringing message from the terminal B 60. Various methods may be used, such as a method of not relaying to the terminal A 50 or a method of not outputting its own tone signal even when the terminal A 50 receives the 180 ringing message. On the other hand, the process "208" and "209" on the drawing means that this manner is applied.

Subsequently, the terminal B 60 will accept a new session creation request for the replacement multimedia content in response to the new session creation request (content support query) in step 207 (and media supported by the terminal). Information will be sent to the application server 10 by loading its own media information (sdp # 2) in a 200 OK message (200 OK (sdp # 2)) (210). At this time, the terminal B (60) grasps the content attribute and the related media information received from the application server 10 to determine the terminal information {content support items (content support format, content support codec), IP address, port number, etc.} Capability information] is carried in a 200 OK message and sent to the application server 10 so that new session establishment can be processed through this terminal information.

Then, the application server 10 has to relay to the terminal A 50 a 200 OK message received from the terminal B 60 as a result of the new invite message transmission as defined in SIP. In the present invention, the terminal A 50 has requested the creation of a new session, but since the terminal A 50 is actually for establishing a new session between the media server 30 and the terminal B 60, the black hold setting matters to the terminal A 50. This inserted 200 OK message is sent to terminal A 50 to inform terminal B 60 that it has accepted the request for creating a new session (alternative multimedia content will be provided) and to not send any media through the new session. Command (211).

Then, the application server 10 receives the terminal information {content support items (content support format, content support codec), IP address, port number, etc.] [Capability information] of the terminal B 60 ACK message [ACK (sdp) # 2)] to be transmitted to the media server 30 so that the media server 30 determines the content that can be supported by the terminal B 60 (212). Accordingly, the media server 30 determines the most suitable multimedia content (playable in the terminal B 60) with reference to the content support items of the terminal B 60 and the like.

Meanwhile, the terminal A 50 receives the 200 OK message in the process “211”, recognizes that the new session creation preprocessing process is completed, and transmits an ACK message to the terminal B 60 through the relay of the application server 10. (213, 214).

Herein, the application server 10 recognizes that the new session creation negotiation process is completed through the relay of the ACK message, and transmits the replacement multimedia content to the terminal B 60. INFO (play req)] is transmitted to the media server 30 (215).

Then, after the media server 30 responds to the content transfer start command (216), it establishes a new session with the terminal B 60 and transfers the predetermined multimedia content previously determined through the new session in real time. (RTP; Real-time Transport Protocol) and the like to the terminal B (60) (217). Accordingly, when the terminal B 60 receives the alternative multimedia content through the new session, the terminal A user's image is not displayed on the screen by using the session processing function, the screen processing function, or the data processing function as described above. Only content is displayed on the screen. Here, the terminal B user makes a video call while viewing the terminal A user image and the video disappears while the video disappears and the alternative multimedia content is made.

Meanwhile, a process of a terminal A user making a video call while showing an alternative multimedia content held by a service provider instead of his video to the terminal B user and showing an original video (relative user video) is as follows.

First, the terminal A user makes a video call while sending an alternative multimedia content to the terminal B user, and selects an original video return request item (or an alternative multimedia content transmission stop item) through the terminal menu.

Accordingly, the terminal A 50 requests to stop the transmission of the replacement multimedia content in response to the user's request for returning the original video. In step 217, the terminal A 50 substitutes the multimedia content between the media server 30 and the terminal B 60. The new session information used in the transmission is loaded into the buy message [BYE] and transmitted to the application server 10 (250). Here, the new session information inserted into the by-message includes a call-ID uniquely representing a new session between the media server 30 and the terminal B 60 used to transmit the alternative multimedia content. Session information, such as the branch of via-header, is used. Similarly, in order to end the video call session, the video call session information may be transmitted in a buy message.

Then, the application server 10 recognizes the alternative multimedia transmission stop request of the terminal A (50) and sends a content transmission stop command to the media server (30) by sending a message to the media server (30) by sending a stop message (BYE (stop req)) Command 251 stops the transmission of the multimedia content that was being provided to B 60 (251).

Accordingly, the media server 30 stops the transmission of the alternative multimedia content that was provided to the terminal B 60 and transmits a 200 OK message to the application server 10 in response to the above message (252). Here too, the application server 10 preferably authenticates whether the terminal A 50 is subscribed to the service of the present invention when receiving a new session termination request from the terminal A 50 as in the step “204”.

Subsequently, the application server 10 recognizes that the content transmission from the media server 30 is stopped, and receives a buy message (ie, a new session termination request) received from the terminal A 50 in step “250”. It relays to B 60 and requests termination of a new session and notifies that transmission of the alternative multimedia content is stopped (253).

When the terminal B 60 receives the new session termination request, the terminal B 60 transmits a 200 OK message [200 OK] to the terminal A 50 through the relay of the application server 10 (254, 255). ). In this case, since the transfer of the alternative multimedia content from the media server 30 is stopped at the time when the terminal B 60 receives the request for ending the new session, it is preferable to close the screen used for displaying the alternative multimedia content while stopping the playback of the alternative multimedia content. In this case, it is preferable to terminate the new session established between the media servers 30.

Accordingly, the original video call session, which was originally established for the video transmission, between the terminal A 50 and the terminal B 60 is returned, and the terminal A 50 is transferred to the terminal B 60 on the video call session. The user A's image is transmitted, and the terminal B 60 transmits the image of the terminal B's user to the terminal A 50, and accordingly, the user makes a video call while watching each other's image (256).

While the content of the present invention has been described by way of examples, the embodiments of the present invention are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. Those skilled in the art to which the present invention pertains may modify or alter the present invention in various forms within the principles and scope described in the claims herein.

As described above, the present invention prevents the user's video from being exposed to the other party during the video call, thereby protecting the user's privacy and reducing the video call burden caused by the user's video exposure, thereby enabling the video call service to be activated. It is effective.

In addition, the present invention can send a variety of multimedia to the other party in place of the user's image there is an effect that the interactive (interactive) communication between the user can be made.

Claims (22)

A method for providing a terminal initiation protocol (SIP) based video call service to a terminal A and a terminal B having a multi-session processing function, a multi data processing function, and a multi screen processing function in an application server, A first step of authenticating whether or not the terminal A subscribes to a service when a video call session is established between the terminal A and the terminal B and a request for transmission of a substitute multimedia content selected by the user is received from the terminal A; A second step of inquiring a content selected by the user from a media server if the user is subscribed to the service as a result of the authentication; A third step of notifying the terminal B of an alternative multimedia content transmission schedule through a new session using the checked content information as a parameter; A fourth step of instructing the media server to determine an appropriate alternative multimedia content by referring to the terminal information received from the terminal B as a result of the third step; And A fifth step of instructing the media server to transmit the determined replacement multimedia content to the terminal B through a new session with the terminal B; Alternative multimedia content providing method during a video call comprising a. The method of claim 1, A sixth step of instructing the media server to stop transmitting the alternative multimedia content to the terminal B when a new session is established between the media server and the terminal B and receiving a request to stop transmitting the alternative multimedia content from the terminal A; And A seventh step of notifying the terminal B of the transmission of the alternative multimedia content upon receiving a response to the content transmission stop command from the media server; Alternative multimedia content providing method during a video call further comprising. The method of claim 2, In the first step of receiving the alternative multimedia content transmission request selected by the user from the terminal A, the user receives an invite message [INVITE (CID) inserted with the alternative multimedia content ID (CID) selected by the user from the terminal A; Method for providing alternative multimedia content during a video call. The method of claim 2, Receiving the alternative multimedia content transmission request selected by the user from the terminal A in the first step, receiving the alternative multimedia content ID (CID) selected by the user from a content server, corresponding to the request for creating a new session from the terminal A Method for providing alternative multimedia content during a video call, characterized in that receiving an invite message [INVITE]. The method according to claim 3 or 4, In the second step, the alternative multimedia content ID (CID) selected by the user is loaded in the invite message [INVITE (CID)] and transmitted to the media server, and as a result of response to the invite message from the media server. And a 200 OK message (200 OK (sdp MM)) in which substitute multimedia content information is inserted. The method of claim 5, In the third step, the service identifier and the replacement multimedia content information (sdp MM) are loaded into a new invite message [INVITE (sdp MM)] having a dialog different from the invite transaction received from the terminal A. Method for providing alternative multimedia content during a video call, characterized in that for transmitting to the terminal B. The method of claim 6, Discarding the 180 ringing message when receiving a 180 ringing message from the terminal B as a result of transmitting the new invite message [INVITE (sdp MM)] between the third step and the fourth step. Alternative multimedia content providing method during a video call, characterized in that it further comprises. The method of claim 6, Between the third step and the fourth step, a 200 OK message [200 OK (sdp) inserted with terminal information (sdp # 2) from the terminal B as a result of transmitting the new invite message [INVITE (sdp MM)]. # 2)], the method further comprising the step of relaying the terminal A by setting a black hold to the 200 OK message. The method of claim 6, In the sixth step, the receiving of the request for discontinuing the replacement multimedia content from the terminal A may include: a by message [BYE] in which new session information used to transmit the replacement multimedia content between the media server and the terminal B is inserted from the terminal A; Alternative multimedia content providing method during a video call, characterized in that receiving. The method of claim 9, In the step 7 of notifying the transmission of the alternative multimedia content to the terminal B, when receiving a 200 OK message [200 OK] for the command to stop the content transmission from the media server to receive the by-message received from the terminal A; Alternative multimedia content providing method during a video call, characterized in that the relay to the terminal B. A system for providing a terminal initiation protocol (SIP) based video call service to a terminal A and a terminal B having a multi-session processing function, a multi data processing function, and a multi screen processing function, A content server providing an alternative multimedia content selection menu to the terminal A, transmitting an alternative multimedia content ID (CID) selected by the user to the terminal A or an application server, and sharing the alternative multimedia content data selected by the user with a media server; ; In a state where a video call session is established between the terminal A and the terminal B, upon receiving a request for transmission of an alternative multimedia content selected by the user from the terminal A, the terminal authenticates whether to subscribe to a service, and a media server for the alternative multimedia content selected by the user. Inquires about the corresponding contents information, informs the terminal B of the transmission of the alternative multimedia contents through the new session by using the checked contents information as a parameter, and with reference to the terminal information received from the terminal B as a result of the notification, The application server instructing the media server to determine suitable alternate multimedia content and transmit to the terminal B through a new session with the terminal B; And Share the alternative multimedia content data selected by the user with the content server, provide alternative multimedia content information selected by the user to the application server, and determine content by referring to terminal information of the terminal B received from the application server; The media server establishes a new session with the terminal B according to the content transfer start command from the application server and transmits the replacement multimedia content to the terminal B. Alternative multimedia content providing system during a video call comprising a. The method of claim 11, The application server, In a state where a new session is established between the media server and the terminal B, upon receiving a request to stop the replacement multimedia content from the terminal A, the media server is instructed to stop transmitting the alternative multimedia content to the terminal B. And receiving a response to the content transmission stop command, further notifying the terminal B of the transmission of the alternative multimedia content. The method of claim 12, The application server, A new invite message with a dialog different from the invite transaction received from the terminal A with the service identifier and the replacement multimedia content information (sdp MM) in the state of transition to the B2BUA (Back-to-Back User Agent) mode. A system for providing alternative multimedia contents during a video call, characterized in that the mobile terminal transmits the information to the terminal B by being loaded on [INVITE (sdp MM)]. The method of claim 13, The terminal B, And discarding the 180 ringing message corresponding to the new invite message [INVITE (sdp MM)] received from the application server and not transmitting it to the application server. The method of claim 13, The application server, And upon receipt of a 180 ringing message from the terminal B as a result of transmitting the new invite message [INVITE (sdp MM)], discarding the 180 ringing message. The method of claim 13, The terminal A, And upon receipt of a 180 ringing message from the terminal B by relaying the application server, discarding the 180 ringing message. The method according to any one of claims 14 to 16, The application server, If a 200 OK message [200 OK (sdp # 2)] containing the terminal information (sdp # 2) is received from the terminal B as a result of the transmission of the new invite message [INVITE (sdp MM)], the 200 OK message is black. A system for providing alternative multimedia content during a video call, further comprising relaying to the terminal A by setting a black hold. The method of claim 17, The terminal A, Receiving a 200 OK message [200 OK (black hold)] in which a black hold is set from the application server, the media call is prevented from being transferred to a new session to be established for alternative multimedia content transmission. Multimedia content providing system. The method of claim 18, The terminal B, When a new session is established with the media server, the counterpart image received through the established video call session is not displayed on the screen, and the alternative multimedia content received through the new session is displayed on the screen. Alternative multimedia content providing system during video call. The method of claim 19, The terminal B, Receiving a buy message [BYE] in which the new session information is inserted from the application server, the new session is terminated, and the established video call session is returned to display the video of the other party on the screen. Of alternative multimedia content providing system. An application server for providing a terminal initiation protocol (SIP) -based video call service to terminals A and B having a multi-session processing function, a multi-data processing function, and a multi-screen processing function, A first step of authenticating whether or not the terminal A subscribes to a service when a video call session is established between the terminal A and the terminal B and a request for transmission of a substitute multimedia content selected by the user is received from the terminal A; A second step of inquiring a content selected by the user from a media server if the user is subscribed to the service as a result of the authentication; A third step of notifying the terminal B of an alternative multimedia content transmission schedule through a new session using the checked content information as a parameter; A fourth step of instructing the media server to determine an appropriate alternative multimedia content by referring to the terminal information received from the terminal B as a result of the third step; And A fifth step of instructing the media server to transmit the determined replacement multimedia content to the terminal B through a new session with the terminal B; A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 21, A sixth step of instructing the media server to stop transmitting the alternative multimedia content to the terminal B when a new session is established between the media server and the terminal B and receiving a request to stop transmitting the alternative multimedia content from the terminal A; And A seventh step of notifying the terminal B of the transmission of the alternative multimedia content upon receiving a response to the content transmission stop command from the media server; A computer-readable recording medium having recorded thereon a program for further realization.

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